Active power control strategy for energy storage power supply and clean energy networking

Abstract

This invention discloses an active power control strategy for interconnecting energy storage power and clean energy sources. The strategy coordinates the control of energy storage power and clean energy through a complementary integrated power control center. This center comprises a complementary integration unit, an energy storage power unit, and a clean energy unit. The complementary integration unit sends instructions to the energy storage power unit and the clean energy unit, including instructions to allocate target active power values ​​for the energy storage power unit and to generate start-up and shutdown operation suggestions for the clean energy power units. This satisfies the total active power setpoint of the complementary integrated power system (comprising energy storage and clean energy) and the regulation requirements of primary frequency regulation, as well as the charging and discharging requirements of the energy storage power battery. This invention introduces adjustments to the battery state parameters of each energy storage power unit and suppresses the overall sensitivity of the control strategy, achieving good economic efficiency and stability in the combination of clean energy and energy storage power.

Description

Technical Field

[0001] This invention belongs to the field of power system automation control technology, and relates to an active power control strategy for connecting energy storage power sources and clean energy sources. Background Technology

[0002] With the implementation of the new energy strategy, the proportion of clean energy in China's power grid is constantly increasing. However, clean energy power plants, which are mainly composed of photovoltaic power generation and wind power generation, are "dependent on the weather." Their power generation capacity is heavily dependent on non-adjustable and non-storable meteorological resources, exhibiting strong randomness and volatility, which seriously threatens the safety of the power grid. In particular, wind power, due to its reverse peak-shaving characteristic where the peak generation and peak consumption are completely opposite, is even referred to as "garbage electricity" in some cases.

[0003] Unlike conventional and clean energy sources, energy storage power sources do not have the ability to generate electricity (i.e., generate electricity independently). Instead, they rely on battery storage systems and the control of charging and discharging of these systems to provide additional power storage and bidirectional (charge and discharge) regulation capabilities to the power system, in addition to conventional and clean energy sources. Although they cannot generate electricity, thanks to their mechanisms and characteristics, energy storage power sources have unparalleled technical advantages over conventional and clean energy sources in terms of active power regulation delay, regulation rate, and regulation accuracy. They can simultaneously meet the regulation requirements of primary and secondary frequency regulation of the power system, greatly enhancing the dynamic balance between power consumption and supply. Therefore, despite limitations in chemical battery technology, such as cost, lifespan, and footprint, energy storage power source frequency regulation projects have continued to flourish in recent years.

[0004] By coordinating the active power control of clean energy and energy storage as an organic whole, with clean energy power generation and energy storage power handling primary and secondary frequency regulation, the advantages are that it solves the problems of clean energy lacking regulation capabilities and energy storage power lacking generation capabilities. Because energy storage power has extremely low regulation delay, extremely high regulation rate, and extremely high regulation accuracy, it can largely compensate for the random fluctuations in the output power of clean energy in a short period of time. However, due to the limitations of current electrochemical energy storage technology, energy storage power cannot yet achieve true power storage and can only serve as an auxiliary regulation means, still constrained by the fact that clean energy is not readily available for storage due to meteorological resources. Summary of the Invention

[0005] The technical problem solved by this invention is to provide an active power control strategy for connecting energy storage power sources and clean energy sources in a network. This strategy introduces the battery state parameters of each unit of the energy storage power source for adjustment, thereby enabling the energy storage power source to compensate for the power generation of clean energy sources and adjust the primary frequency regulation target, thus improving the economy and stability of clean energy power generation.

[0006] This invention is achieved through the following technical solution:

[0007] An active power control strategy for interconnecting energy storage power sources and clean energy sources involves coordinated control of the energy storage power sources and clean energy sources through a complementary integrated power control center.

[0008] The complementary integrated power supply control center is equipped with a complementary integration unit, an energy storage power supply unit, and a clean energy unit. The complementary integration unit sends instructions to the energy storage power supply unit and the clean energy unit, including instructions to allocate the target value of the unit active power of the energy storage power supply unit and to generate start-up and shutdown operation suggestions for the clean energy power supply unit. This is to meet the regulation requirements of the total active power set value of the complementary integrated power supply composed of the energy storage power supply and the clean energy supply, as well as the charging and discharging requirements of the energy storage power supply battery.

[0009] The complementary integrated unit allocates the target active power value of the energy storage power unit as follows:

[0010] The active power output deviation of the clean energy power supply unit is obtained by adding the total active power setpoint of the complementary integrated power supply to the unit primary frequency regulation target adjustment of the clean energy power supply unit, and then subtracting the actual active power output of the clean energy power supply unit.

[0011] The compensation adjustment amount of the energy storage power unit is updated according to the active power output deviation at a fixed period; the target value of the active power of the energy storage power unit is equal to the compensation adjustment amount after dead zone processing minus the charge and discharge correction power of the energy storage power unit.

[0012] The charge / discharge correction power is calculated periodically by the energy storage power unit based on the ideal rated charge / discharge power, battery capacity, and battery charge / discharge threshold, and then sent to the complementary integration unit.

[0013] The complementary integration unit generates start-up and shutdown operation suggestions for clean energy units based on the possible fluctuation range of active power corresponding to the start-up and shutdown sequence of clean energy units in the future period and the quantified value of the mismatch between the total active power setting value of the complementary integrated power supply.

[0014] The energy storage power unit obtains intermediate control parameters of the energy storage power based on the basic parameters of the energy storage power and sends them to the complementary integration unit. It also performs unit-level AGC allocation of the energy storage power and closed-loop regulation of the unit's active power based on the received active power target value.

[0015] The clean energy unit obtains intermediate parameters for clean energy power supply control based on clean energy sources, including wind power and photovoltaic power generation, and sends them to the complementary integration unit; it also sends start-up and shutdown operation suggestions for wind power and photovoltaic generator sets.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] This invention uses the target value of the active power of the unit as the adjustment target and delineation point for the new energy power unit and the energy storage power unit, thereby facilitating the mechanism analysis and control of the combination of functional blocks. For clean energy power sources that do not have primary frequency regulation function but must undertake primary frequency regulation obligations as power generation power sources, a control strategy is adopted to transfer their primary frequency regulation task to the energy storage power source. Furthermore, the charging and discharging correction power is introduced into the target value of the active power of the energy storage power unit, at the cost of the overall output error of the integrated power source within the tolerance range of the grid, so that the grid is used as the charging and discharging source of the energy storage power battery.

[0018] This invention focuses on the issue of shallow charging and discharging of batteries in energy storage power supplies. On the one hand, it incorporates the battery state parameters of each unit into the calculation of the adjustment coefficient of the energy storage unit. On the other hand, it designs a control strategy to prevent drastic changes in the adjustment coefficients of each energy storage unit, so as to simultaneously take into account the need for balanced battery state of each unit and the need for dynamic stability of active power during the adjustment process. Furthermore, to address the non-ideal nature of the adjustment process and results caused by issues such as delay and accuracy in power regulation, it introduces a large number of parameters such as computational dead zone into the active power control strategy to suppress the overall sensitivity of the control strategy and prevent problems such as excessive calculation frequency, frequent changes in adjustment targets, and overcompensation. Thus, it achieves good economy and stability in the combination of clean energy and energy storage power supply. Attached Figure Description

[0019] Figure 1 This is a diagram of the calculation and control logic framework of the energy storage power unit of the present invention;

[0020] Figure 2 This is a logic flowchart for calculating the adjustment coefficients of each energy storage unit in the energy storage power unit according to the present invention.

[0021] Figure 3 This is a schematic diagram showing the relationship between the effective threshold parameters for upward and downward adjustment of each energy storage unit of the present invention and the battery state-of-charge capacity ratio.

[0022] Figure 4 This is a simulation model diagram of the complementary integrated power supply of "clean energy + energy storage power supply" of the present invention;

[0023] Figure 5 This is a diagram illustrating the adjustment effect of the complementary integrated power supply of "clean energy + energy storage power" of the present invention.

[0024] Figure 6 This diagram illustrates the adjustment effect of shallow charging and discharging of the energy storage battery in the complementary integrated power supply of "clean energy + energy storage power" of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to embodiments. These descriptions are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] An active power control strategy for interconnecting energy storage power sources and clean energy sources involves coordinated control of the energy storage power sources and clean energy sources through a complementary integrated power control center.

[0027] The complementary integrated power supply control center is equipped with a complementary integration unit, an energy storage power supply unit, and a clean energy unit. The complementary integration unit sends instructions to the energy storage power supply unit and the clean energy unit, including instructions to allocate the target value of the unit active power of the energy storage power supply unit and to generate start-up and shutdown operation suggestions for the clean energy power supply unit. This is to meet the regulation requirements of the total active power set value of the complementary integrated power supply composed of the energy storage power supply and the clean energy supply, as well as the charging and discharging requirements of the energy storage power supply battery.

[0028] The complementary integrated unit allocates the target active power value of the energy storage power unit as follows:

[0029] The active power output deviation of the clean energy power supply unit is obtained by adding the total active power setpoint of the complementary integrated power supply to the unit primary frequency regulation target adjustment of the clean energy power supply unit, and then subtracting the actual active power output of the clean energy power supply unit.

[0030] The compensation adjustment amount of the energy storage power unit is updated according to the active power output deviation at a fixed period; the target value of the active power of the energy storage power unit is equal to the compensation adjustment amount after dead zone processing minus the charge and discharge correction power of the energy storage power unit.

[0031] The charge / discharge correction power is calculated periodically by the energy storage power unit based on the ideal rated charge / discharge power, battery capacity, and battery charge / discharge threshold, and then sent to the complementary integration unit.

[0032] The complementary integration unit generates start-up and shutdown operation suggestions for clean energy units based on the possible fluctuation range of active power corresponding to the start-up and shutdown sequence of clean energy units in the future period and the quantified value of the mismatch between the total active power setting value of the complementary integrated power supply.

[0033] The energy storage power unit obtains intermediate control parameters of the energy storage power based on the basic parameters of the energy storage power and sends them to the complementary integration unit. It also performs unit-level AGC allocation of the energy storage power and closed-loop regulation of the unit's active power based on the received active power target value.

[0034] The clean energy unit obtains intermediate parameters for clean energy power supply control based on clean energy sources, including wind power and photovoltaic power generation, and sends them to the complementary integration unit; it also sends start-up and shutdown operation suggestions for wind power and photovoltaic generator sets.

[0035] The operation of the complementary integration unit includes:

[0036] Parameters input by S1100:

[0037] S1111) The total active power setting value of the complementary integrated power supply directly input;

[0038] S1112) Rated active power capacity of each type of power unit, wherein the rated active power capacity of clean energy power supply is equal to the sum of the rated active power capacity of a single wind turbine or photovoltaic unit that is generating electricity, and the rated active power capacity of energy storage power supply depends on the rated capacity of each energy storage unit and the state of charge of the battery.

[0039] S1113) The actual active power generated by the unit, wherein the actual active power generated by the unit of the clean energy unit is the sum of the actual active power generated by each unit of the clean energy power supply unit, and the actual active power generated by the unit of the energy storage power supply unit is the sum of the actual active power generated by each unit of the energy storage power supply unit.

[0040] Parameters sent by the S1120 energy storage power unit:

[0041] S1121) The charge and discharge correction power of the energy storage power unit is calculated by the energy storage power unit based on parameters such as the battery status of each energy storage unit.

[0042] S1122) The active power regulation dead zone of the energy storage power unit is equal to the sum of the active power regulation dead zones of the single unit of the operating unit.

[0043] Input parameters sent by the S1130 clean energy power supply unit:

[0044] S1131) The actual active power output of the unit of the clean energy power supply unit is included in the calculation. It is calculated by the clean energy power supply unit based on the actual active power output of the unit and the dead zone of each clean energy unit.

[0045] S1132) The actual active power output of the unit of the clean energy power supply unit is used as a filter value for calculation. It is calculated by the clean energy power supply unit based on the actual active power output of the unit and the dead zone of each clean energy unit.

[0046] S1133) The possible fluctuation range of active power of clean energy power supply unit is the prediction result of the fluctuation range of active power of clean energy power supply unit within a certain period of time in the future.

[0047] S1134) The start-up sequence and shutdown sequence of the clean energy power supply unit, and their corresponding active power fluctuation range sequences, are used to generate start-up and shutdown operation suggestions for the clean energy unit.

[0048] The primary frequency regulation target adjustment of the clean energy power supply unit (S1135) is equal to the sum of the primary frequency regulation target adjustment of the single unit of the wind power and photovoltaic power generation units that are currently generating electricity.

[0049] The following is a detailed description of each unit.

[0050] like Figure 1 As shown, the S2000 energy storage power unit performs unit-level AGC allocation of the energy storage power and closed-loop regulation of the unit's active power, and calculates various intermediate parameters used by the complementary integrated unit, specifically including:

[0051] S2100) Calculates the capacity ratio of each energy storage unit's battery charge and the overall capacity ratio of the energy storage unit's battery charge:

[0052] S2110) Calculate the battery charge ratio of each energy storage unit. In the formula r i The state-of-charge (SOC) ratio of the batteries in energy storage unit i. i The state of charge of the battery in energy storage unit i. and These represent the maximum and minimum battery charge values ​​for energy storage unit i, respectively; for example, when the SOC of a certain energy storage unit is... i =50, and If they are 100 and 10 respectively, then

[0053] S2120) Calculate the overall capacity ratio of the battery charge in the energy storage power unit. In the formula, r represents the overall capacity ratio of the battery charge of the energy storage power unit; for example, an energy storage power unit contains 3 energy storage units with battery states of charge (SOCs) of 40%, 50%, and 60%, respectively, maximum SOCs of 100%, 110%, and 120%, and minimum SOCs of 0%, 5%, and 10%, respectively.

[0054] S2200) Set the judgment threshold R1'~R6' for the overall capacity ratio of the battery state of charge of the energy storage power unit. The setting principle includes: S2210) 0<R1'<R2'<R3'<R4'<R5'<R6'<1;

[0055] S2220)R1'+R6'=1;

[0056] S2230)R2'+R5'=1;

[0057] S2230)R3'+R4'=1.

[0058] In this embodiment, R1' to R6' are set to 20%, 30%, 45%, 55%, 70%, and 80%, respectively.

[0059] S2300) determines the overall battery state of the energy storage power unit, including:

[0060] S2310) When the overall capacity ratio of the energy storage power unit battery charge obtained in S2120 is 0 ≤ r When <R1', the battery of the energy storage power unit is in an extremely low charge state;

[0061] S2320) When R1'≤ r When <R2', the batteries in the energy storage power unit are generally in a low charge state;

[0062] S2330) When R2'≤ r <R3' or R4' < r When R5' is less than or equal to 5', the batteries in the energy storage power unit are generally in a relatively ideal charge state.

[0063] S2340) When R3'≤ r When R4' is less than or equal to 0, the battery of the energy storage power unit is in an ideal state of charge.

[0064] S2350) When R5' < r When R6' is less than or equal to 6, the batteries in the energy storage power unit are generally in a high charge state.

[0065] S2360) When R6' < r When the value is ≤1, the battery of the energy storage power unit is in an extremely high charge state.

[0066] S2400) Set the threshold values ​​R1 to R4 for judging the state-of-charge capacity ratio of the energy storage unit's battery. The setting principle is as follows:

[0067] S2210)0<R1<R2<R3<R4<1;

[0068] S2220)R1+R4=1;

[0069] S2230)R2+R3=1.

[0070] In this embodiment, R1 to R4 are set to 20%, 40%, 60%, and 80%, respectively.

[0071] S2500) sets auxiliary calculation parameters for the regulation coefficients of each energy storage unit in the energy storage power unit, including:

[0072] S2510) Set four threshold parameters K1, K2, K3, and K4, where 0 < K1 < K2 < K3 < K4. In this embodiment, K1 to K4 are set to 0.5, 1, 1.5, and 2, respectively.

[0073] S2520) Set the gradient parameter ΔK for the change of the energy storage unit's regulation coefficient, 0 < ΔK < min[K1,K2-K1,K3-K2,K4-K3], where min[] is the minimum value function. The purpose of setting ΔK is to prevent the dynamic stability of the unit's actual active power from decreasing due to the excessive change of the energy storage unit's regulation coefficient during the regulation process. In this embodiment, ΔK is set to 0.1.

[0074] S2600) calculates the adjustment coefficients of each energy storage unit in the energy storage power unit, such as Figure 2 As shown, it specifically includes:

[0075] S2610) Calculate the upward adjustment coefficient of each energy storage unit in the energy storage power unit:

[0076] S2611) Initialize and set the upward adjustment coefficient of each energy storage unit in the energy storage power unit. In the formula For energy storage unit i, the upward adjustment coefficient is denoted as .

[0077] S2612) The upward adjustment coefficient of each energy storage unit is corrected according to a fixed cycle, that is, the subsequent steps are continuously cyclically run according to a fixed cycle.

[0078] S2613) Calculate the effective threshold parameters for upward adjustment of each energy storage unit. When 0≤r i <R1 time When R1≤r i <R2 When R2≤r i When ≤R3 When R3 < r i When ≤R4 When R4 < r i ≤1

[0079] S2614) Comparison and When the absolute value of the difference between the two is less than or equal to ΔK When the absolute value of the difference between the two is greater than ΔK and hour When the absolute value of the difference between the two is greater than ΔK and hour For example, a certain energy storage unit and Originally, both values ​​were equal to 1. During discharge, the battery's charge capacity ratio decreased to between R1 and R2, therefore... It then decreased to 0.5, and so in the following several cycles, They were revised to 0.9, 0.8, 0.7, 0.6, and 0.5 respectively.

[0080] S2620) Calculate the downward adjustment coefficient of each energy storage unit in the energy storage power unit, including:

[0081] S2621) Initialize and set the downward adjustment coefficient of each energy storage unit in the energy storage power unit. In the formula is the downward adjustment coefficient for energy storage unit i;

[0082] S2622) The downward adjustment coefficient of each energy storage unit is corrected according to a fixed cycle, that is, the subsequent steps are continuously cyclically run according to a fixed cycle.

[0083] S2623) Calculate the effective threshold parameters for downward adjustment of each energy storage unit. k i When 0≤r i <R1 time k i =K4, when R1≤r i <R2 k i =K3, when R2≤r i When ≤R3 k i =K2, when R3 < r i When ≤R4 k i =K1, when R4 < r i ≤1 k i =0;

[0084] S2624) Comparison and k i When the absolute value of the difference between the two is less than or equal to ΔK When the absolute value of the difference between the two is greater than ΔK and hour When the absolute value of the difference between the two is greater than ΔK and hour

[0085] In the above embodiments, the effective threshold parameters for upward and downward adjustment of each energy storage unit are based on the battery state-of-charge capacity ratio ri. k i Each as Figure 3As shown, with the increase of the battery's state of charge (SOC) ratio, the upward adjustment threshold parameter of the energy storage unit increases, while the downward adjustment threshold parameter decreases. Since the upward and downward adjustment coefficients of the energy storage unit tend to change with the changes in the upward and downward adjustment threshold parameters, the upward and downward adjustment coefficients of the energy storage unit also increase and decrease with the increase of the battery's SOC ratio, respectively.

[0086] S2700 performs unit-level AGC allocation of the target active power value of the energy storage power unit, including:

[0087] S2710) When the target value of the active power of the energy storage power unit is equal to 0, the set value of the active power of each energy storage unit is equal to 0.

[0088] (S2720) When the target active power of the energy storage power unit is greater than 0, the setpoint of the single active power of each energy storage unit is allocated according to the ratio of the product of the upward adjustment coefficient of each energy storage unit and the battery capacity. That is, the setpoint of the single active power of the energy storage unit is equal to... In the formula The target active power of the energy storage power unit is set as follows: If the calculated result is greater than the rated active power capacity of the energy storage unit's forward single unit, then the rated active power capacity of the energy storage unit's forward single unit is used as the set value for the single unit's active power. Assuming the target active power of the energy storage power unit is 300MW and there are 3 energy storage units... The battery capacities are 0.5, 1, and 1.5 respectively. With capacities of 200, 150, and 220 MW respectively, the setpoint active power of each of the three energy storage units is as follows:

[0089] (S2730) When the target active power of the energy storage power unit is less than 0, the setpoint of the single active power of each energy storage unit is allocated according to the ratio of the product of the downward adjustment coefficient of each energy storage unit and the battery capacity, that is, the setpoint of the single active power of the energy storage unit is equal to... If the calculated result is less than the rated negative active power capacity of a single energy storage unit, then the rated negative active power capacity of a single energy storage unit will be used as the setpoint for the active power of a single unit. Assuming the target active power of the energy storage power unit is -300MW, and there are 3 energy storage units... The battery capacities are 0.5, 1, and 1.5 respectively. With values ​​of 200, 150, and 220MW respectively, the active power settings for the three energy storage units are -51.7, -77.6, and -170.7MW respectively.

[0090] As described in S2600, the upward adjustment coefficient and downward adjustment coefficient of the energy storage unit increase and decrease respectively as the battery state-of-charge capacity ratio increases. Therefore, according to the calculation methods in S2720 and S2730, when the active power target value of the energy storage unit is greater than 0, that is, when the energy storage unit is generally in a discharging state, the energy storage unit with a higher battery state-of-charge capacity ratio tends to discharge. When the active power target value of the energy storage unit is less than 0, that is, when the energy storage unit is generally in a charging state, the energy storage unit with a lower battery state-of-charge capacity ratio tends to charge. This ensures that the state-of-charge capacity ratio of each energy storage unit remains consistent, so as to avoid overcharging or over-discharging of one or several energy storage units compared to other energy storage units.

[0091] The S2800 energy storage power unit controls the active power of each energy storage unit. Taking the set value of the active power of a single unit as the target, it calculates the deviation between the actual active power generated by a single unit and the set value of the active power of a single unit, and outputs a continuous signal based on the calculation result to adjust the actual active power generated by the single unit of the energy storage unit, so that the actual active power generated by the single unit of the energy storage unit tends to the set value of the active power of the single unit, and finally stabilizes within the adjustment dead zone range of the set value of the active power of the single unit.

[0092] S2900) Calculate the rated active power capacity of the energy storage power unit:

[0093] S2910) Calculate the upward regulation capability of each energy storage unit in the energy storage power unit, including:

[0094] S2911) When the energy storage unit calculates the effective threshold parameter for upward adjustment as in S2613 At that time, the upward adjustment capability of the unit is equal to the rated active power capacity of the unit in the positive direction.

[0095] S2912) When the energy storage unit calculates the effective threshold parameter for upward adjustment as in S2613 At that time, the upward adjustment capacity of the unit is the rated positive single-unit active power capacity of the unit multiplied by . Divide by K2 again;

[0096] For example, when the rated active power capacity of a single generating unit is 50MW, if K2 = 1, then when When the values ​​are 1.5, 1, and 0.5 respectively, the upward adjustment capacity of the unit is 50, 50, and 25 MW respectively.

[0097] S2920) The upward adjustment energy of each energy storage unit obtained in S2910 is accumulated to obtain the rated active power capacity of the forward unit of the energy storage power unit.

[0098] S2930) Calculate the downregulation capability of each energy storage unit in the energy storage power unit, including:

[0099] S2931) When the energy storage unit calculates the effective threshold parameter for downward adjustment as in S2623 k i When K2 is greater than or equal to K2, the downward adjustment capability of the unit is equal to the rated capacity of the negative single unit active power.

[0100] S2932) When the energy storage unit calculates the effective threshold parameter for downward adjustment as in S2623 k i When K2 < K2, the downward regulation capacity of the unit is the rated negative single-unit active power capacity multiplied by 1 / 2. k i Then divide by K2.

[0101] S2940) The downward regulation energy of each energy storage unit obtained in S2930 is accumulated to obtain the rated capacity of the negative unit active power of the energy storage power unit.

[0102] The following is a description of the clean energy unit.

[0103] The operation of the S3000 clean energy unit is as follows:

[0104] S3100) If the clean energy unit is equipped with a power prediction system, the possible fluctuation range of the active power of each clean energy unit in the future time T1 is output using the power prediction function.

[0105] If a power prediction system is not deployed, the following method is used:

[0106] S3121) For clean energy generating units, the current power multiplied by the upper limit prediction parameter is used as the upper limit of the possible fluctuation range of active power in the future time T1, and the current power multiplied by the lower limit prediction parameter is used as the lower limit of the possible fluctuation range of active power, where the upper limit prediction parameter > 1 > the lower limit prediction parameter > 0; the upper limit prediction parameter and the lower limit prediction parameter adopt fixed values ​​or set dynamic parameters according to prior experience.

[0107] S3122) For clean energy units that do not generate electricity, the possible fluctuation range of active power in the future T1 time period of a generator unit with the same or similar performance is used as the possible fluctuation range of active power in the future T1 time period of the unit.

[0108] S3130) Calculate the possible fluctuation range of the active power of the clean energy power supply unit in the future time T1: sum up the upper limits of the possible fluctuation range of the active power of all generator sets of the clean energy power supply unit in the future time T1, and use it as the upper limit of the possible fluctuation range; sum up the lower limits of the possible fluctuation range of the active power of all generator sets of the clean energy power supply unit in the future time T1, and use it as the lower limit of the possible fluctuation range.

[0109] S3200 generates start-up and shutdown sequences for photovoltaic units and wind turbine units respectively, including:

[0110] S3210) Generates a shutdown sequence for photovoltaic power generation units and wind turbine units. The priority is calculated based on the duration of the unit being in power generation mode. The longer the duration of power generation mode, the higher the priority.

[0111] S3220) Generates a startup sequence of available but non-generating photovoltaic and wind turbine units. The priority is calculated based on the duration of the unit's non-generating state. The longer the non-generating state lasts, the higher the priority.

[0112] S3300 generates active power fluctuation range sequences corresponding to start-up and shutdown sequences for photovoltaic units and wind turbine units, including:

[0113] S3310) Generate active power fluctuation range sequences corresponding to the start-up sequences for photovoltaic units and wind turbine units respectively:

[0114] S3311) Set variable u1, with an initial value of 1;

[0115] S3312) The possible fluctuation range of active power of the clean energy power supply unit is added to the possible fluctuation range of active power of the unit ranked u1 in the wind power or photovoltaic start-up sequence to obtain the range of ranked u1 in the possible fluctuation range sequence of active power corresponding to the wind power or photovoltaic start-up sequence. The upper limit of the range of ranked u1 is equal to the upper limit of the possible fluctuation range of active power of the clean energy power supply unit plus the upper limit of the possible fluctuation range of active power of the unit ranked u1 in the wind power or photovoltaic start-up sequence. The lower limit of the range of ranked u1 is equal to the lower limit of the possible fluctuation range of active power of the clean energy power supply unit plus the lower limit of the possible fluctuation range of active power of the unit ranked u1 in the wind power or photovoltaic start-up sequence.

[0116] S3313) Determine whether u1 is equal to the wind power or photovoltaic start-up sequence length. If u1 is equal to the wind power or photovoltaic start-up sequence length, terminate step S3310. Otherwise, execute u1 = u1 + 1 and then continue with the subsequent steps.

[0117] S3314) The range of sorted u1-1 in the active power possible fluctuation range sequence corresponding to the wind power or photovoltaic start-up sequence is added to the active power possible fluctuation range of the wind power or photovoltaic unit sorted u1 in the wind power or photovoltaic start-up sequence to obtain the range of sorted u1 in the active power possible fluctuation range sequence corresponding to the wind power or photovoltaic start-up sequence. The upper limit of the range of sorted u1 is equal to the upper limit of the range of sorted u1-1 plus the upper limit of the active power possible fluctuation range of the unit sorted u1 in the wind power or photovoltaic start-up sequence, and the lower limit of the range of sorted u1 is equal to the lower limit of the range of sorted u1-1 plus the lower limit of the active power possible fluctuation range of the unit sorted u1 in the wind power or photovoltaic start-up sequence.

[0118] (S3315) Jump to step S3313 until u1 equals the length of the wind power or photovoltaic start-up sequence and ends;

[0119] S3320) generates active power fluctuation range sequences corresponding to shutdown sequences for photovoltaic units and wind turbine units, including:

[0120] S3321) Set variable u2, with an initial value of 1;

[0121] S3322) Subtract the possible fluctuation range of the active power of the unit ranked u2 in the wind power or photovoltaic shutdown sequence from the possible fluctuation range of the active power of the clean energy power supply unit to obtain the range of the unit ranked u2 in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic shutdown sequence. The upper limit of the range of the unit ranked u2 is equal to the upper limit of the possible fluctuation range of the active power of the clean energy power supply unit minus the upper limit of the possible fluctuation range of the active power of the unit ranked u2 in the wind power or photovoltaic shutdown sequence. The lower limit of the range of the unit ranked u2 is equal to the lower limit of the possible fluctuation range of the active power of the clean energy power supply unit minus the lower limit of the possible fluctuation range of the active power of the unit ranked u2 in the wind power or photovoltaic shutdown sequence.

[0122] S3323) Determine whether u2 is equal to the length of the wind power or solar power shutdown sequence. If u2 is equal to the length of the wind power or solar power shutdown sequence, terminate step S3320. Otherwise, execute u2 = u2 + 1 and then continue with the subsequent steps.

[0123] (S3324) Subtract the range of active power fluctuation of unit u2 in the sequence of possible fluctuation range of active power corresponding to the wind power or photovoltaic shutdown sequence from the range of unit u2 in the sequence of possible fluctuation range of active power corresponding to the wind power or photovoltaic shutdown sequence, to obtain the range of unit u2 in the sequence of possible fluctuation range of active power corresponding to the wind power or photovoltaic shutdown sequence. The upper limit of the range of unit u2 is equal to the upper limit of the range of unit u2-1 minus the upper limit of the possible fluctuation range of active power of unit u2 in the sequence of possible fluctuation range of active power, and the lower limit of the range of unit u2 is equal to the lower limit of the range of unit u2-1 minus the lower limit of the possible fluctuation range of active power of unit u2 in the sequence of possible fluctuation range of active power.

[0124] (S3325) Jump to step S3323 until u2 equals the length of the wind power or photovoltaic shutdown sequence and ends;

[0125] The S3400 calculation involves the following quantities: the actual active power generated by the clean energy power supply unit.

[0126] S3410) The active power output of the clean energy power supply unit is initially set to be equal to the active power output of the unit in the calculation.

[0127] S3420) Set the output dead zone of each unit of the clean energy power supply unit and accumulate them to obtain the unit output dead zone of the clean energy power supply unit.

[0128] S3430) Compare the actual active power generated by clean energy power supply units with the actual active power generated by clean energy power supply units in the current period according to a fixed period:

[0129] S3431) If the absolute value of the difference between the two is less than or equal to the output dead zone of the clean energy power supply unit, the actual active power generated by the clean energy power supply unit remains unchanged in the calculation.

[0130] S3432) If the absolute value of the difference between the two is greater than the dead zone of the clean energy power supply unit, then the actual active power generated by the clean energy power supply unit is included in the calculation and is equal to the actual active power generated by the clean energy power supply unit in the current period.

[0131] The filter value used in the calculation of the actual active power generated by the S3500 clean energy power supply unit is:

[0132] S3510) The filter value for the active power generated by the clean energy power supply unit is initially set to be equal to the active power generated by the unit.

[0133] S3520) Calculates the filtering threshold for the actual active power output of clean energy power supply units, including:

[0134] S3521) Set the scaling factor λ, where λ > 1;

[0135] S3522) The filtering threshold of the actual active power output of the clean energy power supply unit is equal to the dead zone of the unit output described in S3420 multiplied by λ.

[0136] S3530) Compares the filtered value of the actual active power generated by the clean energy power supply unit with the actual active power generated by the clean energy power supply unit in the current period according to a fixed period:

[0137] S3531) If the absolute value of the difference between the two is less than or equal to the filtering threshold obtained in S3522, the actual active power generated by the clean energy power supply unit remains unchanged in the calculation of the filtered value.

[0138] S3532) If the absolute value of the difference between the two is greater than the filtering threshold obtained in S3522, then the filtered value of the active power generated by the clean energy power supply unit is equal to the active power generated by the clean energy power supply unit in the current period.

[0139] The target adjustment amount for the primary frequency regulation of the S3600 clean energy power supply unit is:

[0140] S3610) The grid frequency deviation is equal to the grid rated frequency minus the grid real-time frequency.

[0141] S3620) If the absolute value of the grid frequency deviation is less than or equal to the primary frequency regulation threshold, then the unit primary frequency regulation target adjustment of the clean energy power supply unit is equal to 0.

[0142] (S3630) If the absolute value of the grid frequency deviation is greater than the primary frequency regulation threshold, the target adjustment amount of the primary frequency regulation of the clean energy power supply unit is equal to the actual value of the active power generated by the clean energy power supply unit multiplied by the grid frequency deviation and then multiplied by the primary frequency regulation coefficient of the clean energy given by the grid.

[0143] The following is a detailed description of the complementary integrated unit.

[0144] The S4000 complementary integrated unit allocates the target active power value of the energy storage power unit and calculates start-up and shutdown operation suggestions for the clean energy power unit to meet the total active power setpoint of the complementary integrated power supply, the regulation requirements of primary frequency regulation, and the charging and discharging requirements of the energy storage power battery. The control model is as follows: Figure 4 As shown, to visually demonstrate the adjustment effect, the influence of primary frequency regulation is excluded in the control model. However, those skilled in the art will readily understand that even if the primary frequency regulation response of the energy storage power supply to the clean energy power supply is introduced, it will not affect the implementation effect of the method of this invention. Specifically, it includes:

[0145] S4100) Calculates the active power capacity range of the clean energy power supply unit within the future time period T1, where T1 is the artificially set parameter mentioned in S3100, including:

[0146] S4110) Calculate the lower limit of the active power capacity of the clean energy power supply unit at each time point in the future time period T1, including:

[0147] S4111) If the dispatcher issues the active power plan curve of the complementary integrated power supply in advance, the positive unit active power rated capacity of the energy storage power unit obtained by subtracting the total active power set value of the complementary integrated power supply at each time point in the future T1 time period from the positive unit active power rated capacity of the energy storage power unit obtained by S2920 is the lower limit of the unit active power tolerance range of the clean energy power supply unit at each time point in the future T1 time period.

[0148] S4112) If the dispatcher does not issue the active power plan curve of the complementary integrated power source in advance, the positive unit active power rated capacity of the energy storage power unit obtained by subtracting the current total active power set value of the complementary integrated power source from the positive unit active power rated capacity of the energy storage power unit obtained by S2920 will be used as the lower limit of the unit active power capacity of the clean energy power unit at each time point in the future T1 time period.

[0149] S4120) Calculate the upper limit of the active power capacity of the clean energy power supply unit at each time point in the future time period T1, including:

[0150] S4121) If the dispatcher issues the active power plan curve of the complementary integrated power supply in advance, the negative unit active power rated capacity of the energy storage power unit obtained by subtracting the total active power set value of the complementary integrated power supply at each time point in the future T1 time period from the negative unit active power rated capacity of the energy storage power unit obtained by S2940 is the upper limit of the unit active power capacity of the clean energy power supply unit at each time point in the future T1 time period.

[0151] S4122) If the dispatcher does not issue the active power plan curve of the complementary integrated power source in advance, the negative unit active power rated capacity of the energy storage power unit obtained by subtracting the current total active power set value of the complementary integrated power source from the negative unit active power rated capacity of the energy storage power unit obtained by S2940 will be used as the upper limit of the unit active power capacity of the clean energy power unit at each time point in the future T1 time period.

[0152] (S4130) The active power capacity of a clean energy power supply unit within the future time period T1 is the intersection of the active power capacity of the clean energy power supply unit at each time point within the future time period T1. That is, the upper limit of the active power capacity of the clean energy power supply unit within the future time period T1 is equal to the minimum value of the upper limit of the capacity at each time point, and the lower limit of the active power capacity of the clean energy power supply unit within the future time period T1 is equal to the maximum value of the lower limit of the capacity at each time point. Assuming that the total active power setpoint gradually decreases from 200MW to 150MW and then gradually increases to 250MW within the future time period T1, with the total active power setpoints at certain time points being 200, 170, 150, 210, and 250MW respectively, and the total upward adjustment capacity of the energy storage power supply unit is 50MW and the total downward adjustment capacity is -100MW, then... The lower limit of the unit active power capacity range corresponding to each time point obtained from S4110 is 200-50=150, 170-50=120, 150-50=100, 210-50=160, 250-50=200MW. The upper limit of the unit active power capacity range corresponding to each time point obtained from S4120 is 200+100=300, 170+100=270, 150+100=250, 210+100=310, 250+100=350MW. The capacity ranges corresponding to each time point are (150,300), (120,270), (100,250), (160,310), and (200,350), respectively. The intersection of these values ​​yields the unit active power capacity range of the clean energy power supply unit in the future time period T1, which is (200,250).

[0153] S4200) calculates the matching degree between the total active power setpoint of the complementary integrated power supply and the start-up and shutdown status of the clean energy power unit, and determines whether start-up and shutdown operations of the clean energy power unit are required. This step, together with the subsequent S4300 and S4400 steps for finding start-up and shutdown operation suggestions, specifically includes:

[0154] S4210) Manually set the threshold parameters for suggesting start-up and shutdown operations;

[0155] S4220) Calculates the quantified value of the mismatch between the current clean energy power unit's start-up / shutdown status and the setpoint of the total active power of the complementary integrated power supply within the future time T1, including:

[0156] S4221) Calculate the upper limit mismatch degree of the range. Subtract the upper limit of the active power tolerance range of the clean energy power supply unit in the future T1 time period obtained by S3131 from the upper limit of the possible fluctuation range of the active power of the clean energy power supply unit in the future T1 time period obtained by S4130, and judge the calculation result. If it is greater than 0, the upper limit mismatch degree of the range is equal to the calculation result; otherwise, the upper limit mismatch degree of the range is equal to 0.

[0157] S4222) Calculate the range lower limit mismatch degree. Subtract the lower limit of the active power capacity range of the clean energy power supply unit in the future T1 time period obtained from S4130 from the lower limit of the active power capacity range of the clean energy power supply unit in the future T1 time period obtained from S3132, and judge the calculation result. If it is greater than 0, the range lower limit mismatch degree is equal to the calculation result; otherwise, the range lower limit mismatch degree is equal to 0.

[0158] S4223) Subtract the lower limit mismatch degree obtained from S4222 from the upper limit mismatch degree of S4221 to obtain the quantified value of the mismatch between the current start-up and shutdown status of the clean energy power unit and the set value of the total active power of the complementary integrated power supply in the future time T1. For example, if the active power capacity range of the clean energy power unit in the future time T1 is (200, 250) obtained from S4130, then when the active power of the clean energy power unit may fluctuate within the range of (100, 130), the mismatch degree of the upper limit is max[0, 130-250] = 0, and the mismatch degree of the lower limit is max[0, 200-100] = 100. Therefore, the quantified value of the mismatch is 0-100 = -100, where max[] is the function for finding the maximum value.

[0159] S4230) Compare the absolute value of the quantified value of the mismatch obtained in S4223 with the judgment threshold parameter set in S4210. If the former is less than the latter, terminate step S4200; otherwise, proceed to the following steps to improve the matching degree between the start-up and shutdown status of the clean energy power unit and the set value of the total active power of the complementary integrated power supply within the future time T1, including:

[0160] S4231) If the quantified value of the mismatch obtained in S4223 is greater than 0, then proceed to step S4300 to find operation suggestions for shutting down the wind turbine generating power and the photovoltaic generating power, respectively.

[0161] S4232) If the quantified value of the mismatch obtained in S4223 is less than 0, then proceed to step S4400 to find operation suggestions for starting up unpowered but usable wind turbine units and unpowered but usable photovoltaic units respectively. According to the example in S4223, the active power capacity range of the clean energy power unit in the future time T1 is (200, 250), and the possible fluctuation range of the active power of the clean energy power unit is (100, 130). The quantified value of the mismatch is -100. Obviously, operation suggestions for starting up unpowered but usable units should be found.

[0162] (S4300) Seeking operational recommendations for shutting down wind turbine generators and photovoltaic generators;

[0163] Taking wind power as an example, it specifically includes:

[0164] S4310) Set variable v1, with an initial value of 1;

[0165] S4320) If v1 is less than or equal to the length of the wind power shutdown sequence, then set the original mismatch metric variable, which is equal to the absolute value of the mismatch metric obtained in S4223; otherwise, proceed to step S4350.

[0166] S4330) Calculates the quantified value of the mismatch between the range of sorted v1 in the sequence of possible active power fluctuations corresponding to the wind power outage sequence and the setpoint of the total active power of the complementary integrated power source within the future time T1, including:

[0167] S4331) Calculate the upper limit mismatch degree of the range. Subtract the upper limit of the unit active power capacity range of the clean energy power supply unit obtained in S4130 in the upper limit of the range of the possible fluctuation range of active power in the sequence corresponding to the wind power shutdown sequence from the upper limit of the range of sorted v1. Then judge the calculation result. If it is greater than 0, the upper limit mismatch degree of the range is equal to the calculation result; otherwise, the upper limit mismatch degree of the range is equal to 0.

[0168] S4332) Calculate the range lower limit mismatch degree. Subtract the lower limit of the range of sorted v1 in the possible fluctuation range sequence of active power of the clean energy power supply unit obtained in S4130 within the future T1 time from the lower limit of the unit active power capacity range of the wind power shutdown sequence. Then judge the calculation result. If it is greater than 0, the range lower limit mismatch degree is equal to the calculation result; otherwise, the range lower limit mismatch degree is equal to 0.

[0169] S4333) Subtract the lower limit mismatch degree from the upper limit mismatch degree obtained in S4332 to obtain the quantified value of the mismatch between the range of sorted v1 in the active power possible fluctuation range sequence corresponding to the wind power shutdown sequence and the set value of the total active power of the complementary integrated power supply in the future time T1.

[0170] S4340) Subtract the absolute value of the mismatched metric obtained by S4333 from the original mismatched metric variable, and perform the following operations based on the calculation result:

[0171] S4341) If the calculation result is greater than or equal to the judgment threshold parameter set in S4210, then v1 = v1 + 1. If v1 is greater than the length of the wind power shutdown sequence at this time, then jump to step S4350. Otherwise, update the original mismatch quantified value variable to the absolute value of the mismatch quantified value obtained in S4333, and jump to step S4330 to continue execution.

[0172] S4342) If the calculation result is less than the judgment threshold parameter set in S4210, then jump to step S4350 to continue execution.

[0173] S4350) Generates operation suggestions based on the value of variable v1, including:

[0174] S4351) If v1 = 1, no operation suggestions are generated;

[0175] S4352) If v1 > 1, then generate a shutdown operation suggestion, suggesting that the wind turbine units corresponding to sequence 1 to v1-1 in the wind power shutdown sequence be shut down.

[0176] S4400) provides operational recommendations for starting up available but not generating wind turbine units and for starting up available but not generating photovoltaic units. Taking photovoltaic units as an example, this includes:

[0177] S4410) Set variable v2, with an initial value of 1;

[0178] S4420) If v2 is less than or equal to the length of the photovoltaic start-up sequence, then set the original mismatch metric variable, which is equal to the absolute value of the mismatch metric obtained in S4223; otherwise, jump to step S4450.

[0179] S4430) Calculates the quantified value of the mismatch between the range of sorted v2 in the sequence of possible fluctuations in active power corresponding to the photovoltaic start-up sequence and the setpoint of the total active power of the complementary integrated power supply within the future time T1, including:

[0180] S4431) Calculate the upper limit mismatch degree of the range. Subtract the upper limit of the unit active power capacity range of the clean energy power supply unit obtained in S4130 within the future T1 time from the upper limit of the range of the active power possible fluctuation range sequence corresponding to the photovoltaic start-up sequence of sorted v2. Then judge the calculation result. If it is greater than 0, the upper limit mismatch degree of the range is equal to the calculation result; otherwise, the upper limit mismatch degree of the range is equal to 0.

[0181] S4432) Calculate the range lower limit mismatch degree. Subtract the lower limit of the range of sorted v2 in the active power fluctuation range sequence corresponding to the photovoltaic start-up sequence from the unit active power capacity range of the clean energy power supply unit obtained in S4130 within the future T1 time. Then judge the calculation result. If it is greater than 0, the range lower limit mismatch degree is equal to the calculation result; otherwise, the range lower limit mismatch degree is equal to 0.

[0182] S4433) Subtract the lower limit mismatch degree from the upper limit mismatch degree obtained in S4431 to obtain the quantified value of the mismatch between the range of sorted v2 in the active power possible fluctuation range sequence corresponding to the photovoltaic start-up sequence and the set value of the total active power of the complementary integrated power supply in the future time T1.

[0183] S4440) Subtract the absolute value of the mismatched metric obtained by S4433 from the original mismatched metric variable, and perform the following operations based on the calculation result:

[0184] S4441) If the calculation result is greater than or equal to the judgment threshold parameter set in S4210, then v2 = v2 + 1. If v2 is greater than the length of the photovoltaic start-up sequence at this time, then jump to step S4450. Otherwise, update the original mismatch metric variable to the absolute value of the mismatch metric obtained in S4433, and jump to step S4430 to continue execution.

[0185] S4442) If the calculation result is less than the judgment threshold parameter set in S4210, then proceed to step S4450 to continue execution.

[0186] S4450) Generates operation suggestions based on the value of variable v2, including:

[0187] S4451) If v2 = 1, no operation suggestions are generated;

[0188] S4452) If v2 > 1, then generate a startup operation suggestion, suggesting that the photovoltaic units corresponding to sequence 1 to v2-1 in the photovoltaic startup sequence be started up.

[0189] S4500) calculates the charge / discharge correction power of the energy storage power unit:

[0190] S4510) Calculate the rated charge and discharge power of the energy storage power unit:

[0191] S4511) Manually set the proportional parameters w1, w2 and the dead zone for charging and discharging power changes;

[0192] S4512) Calculate the ideal rated charge / discharge power of the energy storage power unit. Ideal rated charge / discharge power = min[ The actual active power generated by the w2× clean energy power supply unit is calculated as follows: [where min[] is the function for finding the minimum value]. This step will... The actual active power of the unit and the W2× clean energy power unit are used as the upper limit of the constraint. The former is to avoid the charging and discharging power of the energy storage power supply exceeding the actual charging and discharging demand of the battery, and the latter is to suppress the interference caused by the charging and discharging of the energy storage power supply battery on the stability of the total active power of the complementary integrated power supply.

[0193] S4513) Set the actual rated charge and discharge power of the energy storage power unit according to the ideal rated charge and discharge power obtained in S4512. Compare the actual rated charge and discharge power of the energy storage power unit with the ideal rated charge and discharge power of the current period at a fixed period. When the absolute value of the difference between the two is less than the dead zone of charge and discharge power change set in S4511, the actual rated charge and discharge power remains unchanged; otherwise, update the actual rated charge and discharge power to the ideal rated charge and discharge power of the current period.

[0194] S4520) calculates the battery charge / discharge threshold values ​​for the energy storage power unit, including:

[0195] S4521) When the total battery capacity is in an ideal state, the charge / discharge threshold value is a very small negative number to prevent the battery from being charged and discharged. In this embodiment, it is assumed that this charge / discharge threshold value is -20Hz.

[0196] S4522) When the total battery charge is in a low or high charge state, the charge / discharge threshold value is 0;

[0197] S4523) When the total battery charge is in a state of extremely low or extremely high charge, the charging and discharging threshold value is β, where β is a manually set value between 0 and the primary frequency regulation threshold (scheduling given) of the complementary integrated power supply. In this embodiment, β is assumed to be 0.02Hz.

[0198] S4524) When the total battery capacity is in a relatively ideal state, the charge / discharge threshold value remains unchanged. This step makes the relatively ideal state of the total battery capacity a buffer for changes in charge / discharge state, so as to prevent frequent changes in charge / discharge correction power. That is, the charge / discharge threshold value of the relatively ideal state of capacity is determined by the previous total battery capacity state. When the total battery capacity changes from an extremely ideal state of capacity to a relatively ideal state of capacity, the charge / discharge threshold value is -20Hz. When the total battery capacity changes from a low or high state of capacity to a relatively ideal state of capacity, the charge / discharge threshold value is 0.

[0199] Because different charging and discharging thresholds are set, when the total battery charge is at an extremely high or low level, the power grid can provide reverse compensation to the battery charge with higher priority than when the total battery charge is at a relatively high or low level, thereby allowing the total battery charge to be restored to a shallow charging and discharging state as quickly as possible.

[0200] (S4530) When the overall capacity ratio r of the energy storage power unit battery charge obtained in S2120 is less than 50%, the calculation steps for the charge / discharge correction power include:

[0201] S4531) When the actual grid frequency is less than or equal to the grid rated frequency minus the battery charging and discharging threshold value obtained by S4520, the charging and discharging correction power is 0.

[0202] (S4532) When the actual frequency of the power grid is greater than the rated frequency of the power grid minus the battery charging and discharging threshold value obtained in S4520, the charging and discharging correction power is the actual rated charging and discharging power obtained in S4513.

[0203] Continuing with the example of S4520, when the total battery charge is less than 50% but in an ideal charge state, the battery will only be charged when the actual grid frequency is greater than 50 - (-20) = 70Hz. Since the grid frequency cannot exceed 70Hz, the battery will not actually be charged when the total battery charge is in an ideal charge state. When the total battery charge is less than 50% and in a low charge state, the battery will only be charged when the actual grid frequency is greater than 50 - 0 = 50Hz. When the total battery charge is less than 50% and in a very low charge state, the battery will be charged when the actual grid frequency is greater than 50 - 0.02 = 49.98Hz. When the total battery charge is less than 50% and in a relatively ideal charge state, whether or not to charge depends on the previous total battery charge state, as mentioned above.

[0204] (S4540) When the overall capacity ratio r of the energy storage power unit battery charge obtained in S2120 is greater than 50%, the calculation steps for the charge / discharge correction power include:

[0205] S4541) When the actual frequency of the power grid is greater than or equal to the rated frequency of the power grid plus the battery charging and discharging threshold value obtained by S4520, the charging and discharging correction power is 0.

[0206] (S4542) When the actual frequency of the power grid is less than the rated frequency of the power grid plus the battery charging and discharging threshold value obtained by S4520, the charging and discharging correction power is the negative value of the actual rated charging and discharging power obtained by S4513.

[0207] Continuing with the S4520 example, when the battery total capacity is >50% but in an ideal charge state, battery discharge only occurs when the actual grid frequency is less than 50 + (-20) = 30Hz. Since the grid operating frequency cannot be less than 30Hz, battery discharge does not actually occur when the battery total capacity is in an ideal charge state. When the battery total capacity is >50% and in a relatively high charge state, battery discharge only occurs when the actual grid frequency is less than 50 + 0 = 50Hz. When the battery total capacity is >50% and in a very high charge state, battery discharge occurs when the actual grid frequency is less than 50 + 0.02 = 50.02Hz. When the battery total capacity is >50% and in a relatively ideal charge state, whether or not discharge occurs depends on the previous battery total capacity state. By setting different charge and discharge thresholds, when the battery total capacity is in a very high or very low state, the grid can provide higher priority reverse compensation to the battery capacity compared to when the battery total capacity is in a relatively high or low state, thereby allowing the battery total capacity to recover to a shallow charge and discharge state as quickly as possible.

[0208] The S4600 complementary integrated unit calculates the target active power value of the energy storage power unit, including:

[0209] S4610) Add the total active power set value of the complementary integrated power supply to the unit primary frequency regulation target adjustment amount of the clean energy power supply unit obtained in S3600, and then subtract the actual active power output value of the clean energy power supply unit to obtain the active power output deviation of the clean energy power supply unit.

[0210] S4620) Based on the active power output deviation of the clean energy power supply unit obtained in S4610, the compensation adjustment amount is set, and the compensation adjustment amount and active power output deviation of the clean energy power supply unit are compared at fixed intervals, including:

[0211] S4621) When the absolute value of the difference between the two is greater than the dead zone of the active power regulation of the energy storage power unit, the compensation regulation amount of the energy storage power unit is equal to the active power output deviation of the clean energy power unit in the current period.

[0212] (S4622) When the absolute value of the difference between the two is less than or equal to the dead zone of the active power regulation of the energy storage power unit, the compensation regulation amount of the energy storage power unit remains unchanged.

[0213] S4630) performs dead-zone processing on the compensation adjustment of the energy storage power unit, including:

[0214] S4631) Manually set the timer and time parameter T3;

[0215] S4632) When the absolute value of the active power output deviation of the clean energy power supply unit is less than or equal to the unit output dead zone of the clean energy power supply unit, the timer set in S4631 starts counting.

[0216] S4633) When the absolute value of the active power output deviation of the clean energy power supply unit is greater than the dead zone of the unit output of the clean energy power supply unit, the timer set in S4631 is reset to zero.

[0217] S4634) When the timer time is less than the time parameter T3, the processed energy storage power unit compensation adjustment amount is equal to the energy storage power unit compensation adjustment amount obtained in S4620.

[0218] (S4635) When the timer time is greater than or equal to the time parameter T3, the compensation adjustment amount of the processed energy storage power unit is equal to 0.

[0219] The target value of the active power of the energy storage power unit (S4640) is equal to the compensation adjustment amount of the energy storage power unit obtained in S4630 minus the charge and discharge correction power of the energy storage power unit obtained in S4500.

[0220] The S4700 energy storage power unit performs unit-level AGC allocation of the unit active power target value obtained in S4640 according to the S2000 method, and adjusts the active power of each energy storage unit.

[0221] Assuming the total active power setpoint of the complementary integrated power source remains at 300MW, and the rated active power capacity of the energy storage unit is ±150MW, the charge / discharge correction power is 80MW during the period from 10s to 30s because the battery needs to be charged and the grid frequency reaches the charging threshold; the charge / discharge correction power is 0MW at other times. Figure 4 The regulation effect of the complementary integrated power supply in the control model shown is as follows: Figure 5 As shown in the diagram, it is easy to see that:

[0222] 1. Energy storage power supplies can effectively compensate for the random fluctuations in output power caused by the randomness and intermittency of clean energy power supplies within a certain deviation range (such as 0-120s), which helps to maintain the stability of the actual total active power of the complementary integrated power supply.

[0223] 2. The charging and discharging of the energy storage battery in the complementary integrated power supply of "clean energy + energy storage power" requires the deviation of the actual value of the total active power of the complementary integrated power supply, which is reflected in the concave curve of the actual value of the total active power in 10 to 30 seconds.

[0224] 3. Due to limitations in rated capacity and battery capacity, when the actual active power output of the clean energy power supply deviates significantly from the total active power setpoint of the complementary integrated power supply (e.g., within 160-200 seconds) or deviates for an extended period from the total active power setpoint of the complementary integrated power supply, the auxiliary regulation function of the energy storage power supply is greatly reduced. This indicates that the energy storage power supply cannot play a significant role in improving the peak-valley response performance of the clean energy power supply. Furthermore, since the regulation resources of the energy storage power supply are exhausted at this time (reaching the upper limit of regulation capacity), the compensation effect of the energy storage power supply on the random fluctuations of the actual active power output of the clean energy power supply also disappears.

[0225] S4800) To further demonstrate the "shallow charge and shallow discharge" characteristic of the energy storage power unit battery in the method of the present invention, further utilize... Figure 4 The control model shown is used for simulation. The control model sets up three energy storage units in the energy storage power unit, with a battery capacity ratio of 5:8:10. The relationships between the integrated power supply's total active power setpoint, the integrated power supply's actual total active power, the clean energy unit's actual active power, each unit's actual active power, each unit's battery state of charge, each unit's battery capacity ratio, the total battery capacity ratio of the energy storage unit, and the energy storage unit's charge / discharge correction power are shown in the following diagrams. Figure 6 As shown, from Figure 6The adjustment effect can be seen in:

[0226] 1) The adjustment range of the active power regulation of the energy storage unit is related to the battery capacity and the battery state of charge. Although the battery capacity of energy storage unit 3 is twice that of energy storage unit 1, the initial charge capacity ratio of the battery of energy storage unit 3 is much lower than that of energy storage unit 1, which results in the discharge range of energy storage unit 3 being smaller than that of energy storage unit 1.

[0227] 2) Since the clean energy unit has no regulation capability, according to the method of the present invention, the calculation of the charge and discharge correction power needs to take into account the grid frequency. Only when the grid frequency is higher than a certain value can the energy storage battery enter the charging state, and conversely, only when the grid frequency is lower than a certain value can the energy storage battery enter the discharging state.

[0228] 3) Although the battery charge capacity ratios of the three energy storage units were artificially set to be significantly different in the initial stage of the simulation, under the control of the "shallow charge and shallow discharge" strategy of this invention, the battery charge capacity ratios of all energy storage units gradually tend to be consistent. At the same time, as mentioned above, since the charging and discharging strategy of this invention can maintain a good balance of the total charge capacity of the energy storage unit cells, the batteries of all energy storage units are naturally in a relatively balanced state (neither overcharged nor over-discharged).

[0229] The embodiments given above are preferred examples for implementing the present invention, and the present invention is not limited to the above embodiments. Any non-essential additions or substitutions made by those skilled in the art based on the technical features of the present invention are within the protection scope of the present invention.

Claims

1. An active power control strategy for connecting energy storage power sources to clean energy sources, characterized in that, The complementary integrated power control center coordinates and controls energy storage power and clean energy sources. The complementary integrated power supply control center is equipped with a complementary integration unit, an energy storage power supply unit, and a clean energy unit. The complementary integration unit sends instructions to the energy storage power supply unit and the clean energy unit, including instructions to allocate the target value of the unit active power of the energy storage power supply unit and to generate start-up and shutdown operation suggestions for the clean energy power supply unit. This is to meet the regulation requirements of the total active power set value of the complementary integrated power supply composed of the energy storage power supply and the clean energy supply, as well as the charging and discharging requirements of the energy storage power supply battery. The complementary integrated unit allocates the target active power value of the energy storage power unit as follows: The active power output deviation of the clean energy power supply unit is obtained by adding the total active power setpoint of the complementary integrated power supply to the unit primary frequency regulation target adjustment of the clean energy power supply unit, and then subtracting the actual active power output of the clean energy power supply unit. The compensation adjustment amount of the energy storage power unit is updated according to the active power output deviation at a fixed period; the target value of the active power of the energy storage power unit is equal to the compensation adjustment amount after dead zone processing minus the charge and discharge correction power of the energy storage power unit. The charge / discharge correction power is updated periodically by the energy storage power unit based on the ideal rated charge / discharge power, battery capacity, and battery charge / discharge threshold, and then sent to the complementary integration unit. The complementary integration unit generates start-up and shutdown operation suggestions for clean energy units based on the possible fluctuation range of active power corresponding to the start-up and shutdown sequence of clean energy units in the future period and the quantified value of the mismatch between the total active power setting value of the complementary integrated power supply. The energy storage power unit obtains intermediate control parameters of the energy storage power based on the basic parameters of the energy storage power and sends them to the complementary integration unit. It also performs unit-level AGC allocation of the energy storage power and closed-loop regulation of the unit's active power based on the received active power target value. The clean energy unit obtains intermediate parameters for clean energy power supply control based on clean energy sources, including wind power and photovoltaic power generation, and sends them to the complementary integration unit; it also sends start-up and shutdown operation suggestions for wind power and photovoltaic generator sets.

2. The active power control strategy for connecting energy storage power sources and clean energy sources to the network as described in claim 1, characterized in that, The parameters acquired by the complementary integration unit include: Parameters input to the complementary integrated unit (S1100): S1111) Total active power setting value of complementary integrated power supply; S1112) Rated active power capacity of unit, wherein the rated active power capacity of unit of clean energy power supply is equal to the sum of the rated active power capacity of a single unit of wind power and photovoltaic power generation unit, and the rated active power capacity of unit of energy storage power supply is updated according to the rated capacity of each energy storage unit and the state of charge of the battery. S1113) The actual active power generated by the unit, wherein the actual active power generated by the clean energy unit is equal to the sum of the actual active power generated by each unit of the clean energy power supply unit, and the actual active power generated by the energy storage power supply unit is equal to the sum of the actual active power generated by each unit of the energy storage power supply unit. Parameters sent by the S1120 energy storage power unit: S1122) The active power regulation dead zone of the energy storage power unit is equal to the sum of the active power regulation dead zones of the single unit of the operating energy storage unit. Parameters sent by the S1130 clean energy power supply unit: S1131) The actual active power output of the unit of the clean energy power supply unit is included in the calculation. The clean energy power supply unit updates the actual active power output of the unit and the dead zone of each clean energy unit at a fixed cycle. S1132) The actual active power output of the unit of the clean energy power supply unit is used as a filter value in the calculation. The filter value is updated by the clean energy power supply unit according to the actual active power output of the unit, the scaling factor and the dead zone of each clean energy unit at a fixed period. S1133) The possible fluctuation range of active power of clean energy power supply unit is a prediction result of the fluctuation range of active power of clean energy power supply unit within a certain period of time in the future. S1134) The start-up sequence and shutdown sequence of the clean energy power supply unit, and the corresponding active power fluctuation range sequence respectively; The primary frequency regulation target adjustment of a clean energy power unit (S1135) is equal to the sum of the primary frequency regulation target adjustment of a single wind turbine or photovoltaic unit that is currently generating electricity.

3. The active power control strategy for connecting energy storage power sources and clean energy sources to the network as described in claim 1, characterized in that, The operation of the energy storage power unit includes: S2100) Calculate the capacity ratio r of the battery charge of each energy storage unit in the energy storage power unit. i , and the overall capacity ratio r of the energy storage power unit battery charge; S2200) Set the judgment threshold R1'~R6' for the overall capacity ratio of the battery state of charge of the energy storage power unit; where 0<R1'<R2'<R3'<R4'<R5'<R6'<1、R1'+R6'=1、R2'+R5'=1、R3'+R4'=1; S2300) Determines the overall battery charge status of the energy storage power unit based on the judgment threshold; S2400) Set the threshold values ​​R1~R4 for judging the state of charge capacity ratio of the battery of the energy storage unit; where 0 < R1 < R2 < R3 < R4 < 1, R1 + R4 = 1, and R2 + R3 = 1; S2500) Set auxiliary calculation parameters for the adjustment coefficient of each energy storage unit in the energy storage power unit: S2510) Set four threshold parameters K1, K2, K3, K4, where 0 < K1 < K2 < K3 < K4; S2520) Set the gradient parameter ΔK for the change of the adjustment coefficient of the energy storage unit, where 0 < ΔK < min[K1, K2 - K1, K3 - K2, K4 - K3], where min[] is the minimum value function. ΔK is set to prevent the adjustment coefficient of the energy storage unit from changing too drastically during the adjustment process; S2600) Calculates the adjustment coefficient of each energy storage unit in the energy storage power unit, including calculating the upward adjustment coefficient of each energy storage unit in the energy storage power unit and calculating the downward adjustment coefficient of each energy storage unit in the energy storage power unit. S2700 performs unit-level AGC allocation of the target active power value of the energy storage power unit: S2710) When the target value of the active power of the energy storage power unit is equal to 0, the set value of the active power of each energy storage unit is equal to 0. (S2720) When the target value of the active power of the energy storage power unit is greater than 0, the set value of the single active power of each energy storage unit is allocated according to the ratio of the product of the upward adjustment coefficient of each energy storage unit and the battery capacity. If the calculation result is greater than the rated capacity of the positive single active power of the energy storage unit, the rated capacity of the positive single active power of the energy storage unit is used as the set value of the single active power. (S2730) When the target value of the active power of the energy storage power unit is less than 0, the set value of the single active power of each energy storage unit is allocated according to the ratio of the product of the downward adjustment coefficient of each energy storage unit and the battery capacity; if the calculation result is less than the rated capacity of the negative single active power of the energy storage unit, the rated capacity of the negative single active power of the energy storage unit is used as the set value of the single active power. The active power control of each energy storage unit in the S2800 energy storage power unit is based on the set value of the active power of a single unit. According to the deviation between the actual active power generated by a single unit and the set value of the active power of a single unit, a continuous signal is output to adjust the actual active power generated by the single unit, so that the actual active power generated by the single unit tends to the set value of the active power of the single unit, and finally stabilizes within the adjustment dead zone range of the set value of the active power of the single unit.

4. The active power control strategy for connecting energy storage power sources and clean energy sources in claim 3, characterized in that, The parameter calculations involved in the energy storage power unit include: S2100) Energy storage unit battery charge ratio r i for: In the formula r i The state-of-charge (SOC) ratio of the batteries in energy storage unit i. i The state of charge of the battery in energy storage unit i. and These are the maximum and minimum battery charge values ​​for energy storage unit i, respectively. The overall capacity ratio r of the energy storage power unit battery charge is: ; Overall battery status of the energy storage power unit: S2310) When the overall capacity ratio of the battery charge of the energy storage power unit is 0≤r<R1', the battery of the energy storage power unit is in an extremely low charge state. (S2320) When R1'≤r<R2', the battery of the energy storage power unit is generally in a low charge state; (S2330) When R2'≤r<R3' or R4'<r≤R5', the battery of the energy storage power unit is in a relatively ideal state of charge. (S2340) When R3'≤r≤R4', the battery of the energy storage power unit is in an ideal state of charge. (S2350) When R5'<r≤R6', the battery of the energy storage power unit is generally in a high charge state; (S2360) When R6'<r≤1, the battery of the energy storage power unit is in an extremely high charge state. The adjustment coefficients of each energy storage unit in the energy storage power unit include: S2610) Upward adjustment coefficient for each energy storage unit in the energy storage power unit: S2611) Initialize and set the upward adjustment coefficient of each energy storage unit in the energy storage power unit. In the formula For energy storage unit i, the upward adjustment coefficient is denoted as . S2612) The upward adjustment coefficient of each energy storage unit is corrected according to a fixed cycle, that is, the subsequent steps are continuously cyclically run according to a fixed cycle. S2613) Calculate the effective threshold parameters for upward adjustment of each energy storage unit. When 0≤r i <R1 time =0, when R1≤r i <R2 =K1, when R2≤r i When ≤R3 =K2, when R3 < r i When ≤R4 =K3, when R4<r i ≤1 =K4; S2614) Comparison and When the absolute value of the difference between the two is less than or equal to ΔK When the absolute value of the difference between the two is greater than ΔK and hour When the absolute value of the difference between the two is greater than ΔK and hour ; S2620) Downward adjustment coefficient for each energy storage unit in the energy storage power unit: S2621) Initialize and set the downward adjustment coefficient of each energy storage unit in the energy storage power unit. In the formula is the downward adjustment coefficient for energy storage unit i; S2622) The downward adjustment coefficient of each energy storage unit is corrected according to a fixed cycle, that is, the subsequent steps are continuously cyclically run according to a fixed cycle. S2623) Calculate the effective threshold parameters for downward adjustment of each energy storage unit. When 0≤r i <R1 time =K4, when R1≤r i <R2 =K3, when R2≤r i When ≤R3 =K2, when R3 < r i When ≤R4 =K1, when R4 < r i ≤1 =0; S2624) Comparison and When the absolute value of the difference between the two is less than or equal to ΔK When the absolute value of the difference between the two is greater than ΔK and hour When the absolute value of the difference between the two is greater than ΔK and hour .

5. The active power control strategy for connecting energy storage power sources and clean energy sources in the network as described in claim 3, characterized in that, The target active power value of the energy storage power unit is allocated at the unit level using AGC, including the following operations: S2710) When the target value of the active power of the energy storage power unit is equal to 0, the set value of the active power of each energy storage unit is equal to 0. (S2720) When the target active power value of the energy storage power unit is greater than 0, the setpoint of the single active power of the energy storage unit is equal to... In the formula: The target value of the active power of the energy storage power unit is used; if the calculated result is greater than the rated capacity of the active power of a single unit of the energy storage unit, then the rated capacity of the active power of a single unit of the energy storage unit is used as the set value of the active power of a single unit. Let be the upward adjustment coefficient for energy storage unit i. and These are the maximum and minimum battery charge values ​​for energy storage unit i, respectively. (S2730) When the target active power value of the energy storage power unit is less than 0, the setpoint of the single active power of the energy storage unit is equal to... ; If the calculated result is less than the rated capacity of the negative single-unit active power of the energy storage unit, then the rated capacity of the negative single-unit active power of the energy storage unit shall be used as the set value of the single-unit active power; where: is the downward adjustment coefficient for energy storage unit i; The energy storage power unit also calculates the rated active power capacity of the energy storage power unit, including: S2910) Calculate the upregulation capability of each energy storage unit in the energy storage power unit: S2911) When the upward adjustment of the energy storage unit takes effect, the threshold parameter becomes effective. When K2 is greater than or equal to K2, the upward adjustment capability of the unit is equal to the rated active power capacity of the unit in the positive direction. S2912) When the upward adjustment of the energy storage unit takes effect, the threshold parameter becomes effective. When K2 < K2, the upward regulation capacity of the unit is the rated positive single-unit active power capacity of the unit multiplied by K2. Divide by K2 again; S2920) The upward adjustment energy of each energy storage unit is accumulated to obtain the rated active power capacity of the forward unit of the energy storage power supply unit; (S2930) Calculate the downregulation capability of each energy storage unit in the energy storage power unit: S2931) When the downward adjustment of the energy storage unit takes effect, the threshold parameter becomes effective. When K2 is greater than or equal to K2, the downward adjustment capability of the unit is equal to the rated capacity of the negative single unit active power. S2932) When the downward adjustment of the energy storage unit takes effect, the threshold parameter becomes effective. When K2 < K2, the downward regulation capacity of the unit is the rated negative single-unit active power capacity multiplied by 1 / 2. Divide by K2 again; S2940) The downward adjustment energy of each energy storage unit is accumulated to obtain the rated capacity of the negative unit active power of the energy storage power unit.

6. The active power control strategy for connecting energy storage power sources and clean energy sources in the network as described in claim 1, characterized in that, The operation of the clean energy unit includes: S3100 generates the possible fluctuation range of active power for each clean energy unit within the future time period T1, and calculates the possible fluctuation range of active power of the clean energy power supply unit, where T1 is a parameter set to reserve sufficient time for possible start-up and shutdown operations of the clean energy unit: S3200 generates start-up and shutdown sequences for photovoltaic units and wind turbine units respectively: S3210) Generate shutdown sequences for photovoltaic and wind turbine generators that generate electricity respectively. The priority is calculated based on the duration of the generator in the power generation state. The longer the duration of the power generation state, the higher the priority. S3220) Generate the start-up sequence of available but non-generating photovoltaic units and wind turbine units respectively. The priority is calculated based on the duration of the unit being in a non-generating state. The longer the duration of the non-generating state, the higher the priority. S3300) generates sequences of possible active power fluctuation ranges corresponding to the start-up and shutdown sequences of photovoltaic units and wind turbine units respectively: S3310) Generate active power fluctuation range sequences corresponding to the start-up sequences for photovoltaic units and wind turbine units respectively; S3320) generates active power fluctuation range sequences corresponding to the shutdown sequences of photovoltaic units and wind turbine units, respectively; S3400) The actual active power generated by the unit of the clean energy power supply unit is included in the calculation. S3500) Calculates the actual active power generated by the clean energy power supply unit, and includes the filtered values ​​in the calculation: S3600) Calculates the primary frequency regulation target adjustment of the clean energy power supply unit: S3610) Calculate the power grid frequency deviation; S3620) If the absolute value of the grid frequency deviation is less than or equal to the given primary frequency regulation threshold, then the unit primary frequency regulation target adjustment of the clean energy power supply unit is equal to 0. (S3630) If the absolute value of the grid frequency deviation is greater than the primary frequency regulation threshold, the target adjustment amount of the primary frequency regulation of the clean energy power supply unit is equal to the actual value of the active power generated by the clean energy power supply unit multiplied by the grid frequency deviation and then multiplied by the given clean energy primary frequency regulation coefficient.

7. The active power control strategy for connecting energy storage power sources and clean energy sources in the network as described in claim 6, characterized in that, The operation of the clean energy unit is as follows: The calculation of the possible fluctuation range of active power within the future time period T1 (S3100) is as follows: If a power prediction system is deployed in the clean energy unit, the possible fluctuation range of the active power of each clean energy unit in the future time T1 is output using the power prediction function. If a power prediction system is not deployed, the following method will be used: S3121) For clean energy generating units, the current power multiplied by the upper limit prediction parameter is used as the upper limit of the possible fluctuation range of active power in the future time T1, and the current power multiplied by the lower limit prediction parameter is used as the lower limit of the possible fluctuation range of active power, where the upper limit prediction parameter > 1 > the lower limit prediction parameter > 0; the upper limit prediction parameter and the lower limit prediction parameter adopt fixed values ​​or set dynamic parameters according to prior experience. S3122) For clean energy units that do not generate electricity, the possible fluctuation range of active power in the future T1 time period of a generator unit with the same or similar performance is used as the possible fluctuation range of active power in the future T1 time period of the unit. S3130) Calculate the possible fluctuation range of the active power of the clean energy power supply unit in the future time T1: sum up the upper limits of the possible fluctuation range of the active power of all generator sets of the clean energy power supply unit in the future time T1, and use it as the upper limit of the possible fluctuation range; sum up the lower limits of the possible fluctuation range of the active power of all generator sets of the clean energy power supply unit in the future time T1, and use it as the lower limit of the possible fluctuation range. S3200 generates start-up and shutdown sequences for photovoltaic units and wind turbine units respectively, including: S3210) Generates a shutdown sequence for photovoltaic power generation units and wind turbine units. The priority is calculated based on the duration of the unit being in power generation mode. The longer the duration of power generation mode, the higher the priority. S3220) Generates a startup sequence of available but non-generating photovoltaic and wind turbine units. The priority is calculated based on the duration of the unit's non-generating state. The longer the non-generating state lasts, the higher the priority. S3300 generates active power fluctuation range sequences corresponding to start-up and shutdown sequences for photovoltaic units and wind turbine units, including: S3310) Generate active power fluctuation range sequences corresponding to the start-up sequences for photovoltaic units and wind turbine units respectively: S3311) Set variable u1, with an initial value of 1; S3312) The possible fluctuation range of active power of the clean energy power supply unit is added to the possible fluctuation range of active power of the unit ranked u1 in the wind power or photovoltaic start-up sequence to obtain the range of ranked u1 in the possible fluctuation range sequence of active power corresponding to the wind power or photovoltaic start-up sequence. The upper limit of the range of ranked u1 is equal to the upper limit of the possible fluctuation range of active power of the clean energy power supply unit plus the upper limit of the possible fluctuation range of active power of the unit ranked u1 in the wind power or photovoltaic start-up sequence. The lower limit of the range of ranked u1 is equal to the lower limit of the possible fluctuation range of active power of the clean energy power supply unit plus the lower limit of the possible fluctuation range of active power of the unit ranked u1 in the wind power or photovoltaic start-up sequence. S3313) Determine whether u1 is equal to the wind power or photovoltaic start-up sequence length. If u1 is equal to the wind power or photovoltaic start-up sequence length, terminate step S3310. Otherwise, execute u1 = u1 + 1 and then continue with the subsequent steps. (S3314) The range of sorted u1-1 in the active power possible fluctuation range sequence corresponding to the wind power or photovoltaic start-up sequence is added to the active power possible fluctuation range of the wind power or photovoltaic unit sorted u1 in the wind power or photovoltaic start-up sequence to obtain the range of sorted u1 in the active power possible fluctuation range sequence corresponding to the wind power or photovoltaic start-up sequence. The upper limit of the range of sorted u1 is equal to the upper limit of the range of sorted u1-1 plus the upper limit of the active power possible fluctuation range of the unit sorted u1 in the wind power or photovoltaic start-up sequence, and the lower limit of the range of sorted u1 is equal to the lower limit of the range of sorted u1-1 plus the lower limit of the active power possible fluctuation range of the unit sorted u1 in the wind power or photovoltaic start-up sequence. (S3315) Jump to step S3313 until u1 equals the length of the wind power or photovoltaic start-up sequence and ends; S3320) generates active power fluctuation range sequences corresponding to shutdown sequences for photovoltaic units and wind turbine units, including: S3321) Set variable u2, with an initial value of 1; (S3322) Subtract the possible fluctuation range of the active power of the unit ranked u2 in the wind power or photovoltaic shutdown sequence from the possible fluctuation range of the active power of the clean energy power supply unit, to obtain the range of the unit ranked u2 in the sequence of possible fluctuation range of active power corresponding to the wind power or photovoltaic shutdown sequence. The upper limit of the range of ranked u2 is equal to the upper limit of the possible fluctuation range of the active power of the clean energy power supply unit minus the upper limit of the possible fluctuation range of the active power of the unit ranked u2 in the wind power or photovoltaic shutdown sequence, and the lower limit of the range of ranked u2 is equal to the lower limit of the possible fluctuation range of the active power of the clean energy power supply unit minus the lower limit of the possible fluctuation range of the active power of the unit ranked u2 in the wind power or photovoltaic shutdown sequence. S3323) Determine whether u2 is equal to the length of the wind power or solar power shutdown sequence. If u2 is equal to the length of the wind power or solar power shutdown sequence, terminate step S3320. Otherwise, execute u2 = u2 + 1 and then continue with the subsequent steps. (S3324) Subtract the range of active power fluctuation of unit u2 in the sequence of possible fluctuation range of active power corresponding to the wind power or photovoltaic shutdown sequence from the range of unit u2 in the sequence of possible fluctuation range of active power corresponding to the wind power or photovoltaic shutdown sequence, to obtain the range of unit u2 in the sequence of possible fluctuation range of active power corresponding to the wind power or photovoltaic shutdown sequence. The upper limit of the range of unit u2 is equal to the upper limit of the range of unit u2-1 minus the upper limit of the range of possible fluctuation range of active power of unit u2 in the sequence of possible fluctuation range of active power, and the lower limit of the range of unit u2 is equal to the lower limit of the range of unit u2-1 minus the lower limit of the range of possible fluctuation range of active power of unit u2 in the sequence of possible fluctuation range of active power. (S3325) Jump to step S3323 until u2 equals the length of the wind power or photovoltaic shutdown sequence and ends; S3400) Calculates the actual active power generated by the clean energy power supply unit as a calculation factor: S3410) The active power output of the clean energy power supply unit is initially set to be equal to the active power output of the unit in the calculation. S3420) The output dead zones of each unit in the clean energy power supply unit are summed to obtain the unit output dead zone of the clean energy power supply unit. S3430) Compare the actual active power generated by clean energy power supply units in the calculation with the actual active power generated by clean energy power supply units in the current period according to a fixed period: S3431) If the absolute value of the difference between the two is less than or equal to the output dead zone of the clean energy power supply unit, the actual active power generated by the clean energy power supply unit remains unchanged in the calculation. S3432) If the absolute value of the difference between the two is greater than the output dead zone of the clean energy power supply unit, then the actual active power generated by the clean energy power supply unit is included in the calculation and is equal to the actual active power generated by the clean energy power supply unit in the current period. The filter value for calculating the actual active power generated by the clean energy power supply unit (S3500) is as follows: S3510) The filter value for the active power of the clean energy power supply unit is initially set to be equal to the active power of the unit. S3520) Calculates the filtering threshold for the actual active power output of clean energy power supply units, including: S3521) Set the scaling factor λ, where λ > 1; S3522) The filtering threshold of the actual active power output of the clean energy power supply unit is equal to the dead zone of the unit output multiplied by λ. S3530) Compares the filtered value of the actual active power generated by the clean energy power supply unit with the actual active power generated by the clean energy power supply unit in the current period according to a fixed period: S3531) If the absolute value of the difference between the two is less than or equal to the filtering threshold obtained in S3522, the actual active power generated by the clean energy power supply unit remains unchanged in the calculation of the filtered value. (S3532) If the absolute value of the difference between the two is greater than the filtering threshold obtained in S3522, then the filtered value of the active power generated by the clean energy power supply unit is equal to the active power generated by the clean energy power supply unit in the current period. The target adjustment amount for the primary frequency regulation of the S3600 clean energy power supply unit is: S3610) The grid frequency deviation is equal to the grid rated frequency minus the grid real-time frequency; S3620) If the absolute value of the grid frequency deviation is less than or equal to the primary frequency regulation threshold, then the unit primary frequency regulation target adjustment of the clean energy power supply unit is equal to 0. (S3630) If the absolute value of the grid frequency deviation is greater than the primary frequency regulation threshold, the target adjustment amount of the primary frequency regulation of the clean energy power supply unit is equal to the actual value of the active power generated by the clean energy power supply unit multiplied by the grid frequency deviation and then multiplied by the primary frequency regulation coefficient of the clean energy given by the grid.

8. The active power control strategy for connecting energy storage power sources and clean energy sources in a network as described in claim 1, characterized in that, The regulation of the clean energy unit by the complementary integrated unit includes: S4100) calculates the active power capacity range of the clean energy power supply unit within the future time T1, including the lower limit of the active power capacity range and the upper limit of the active power capacity range. The S4200 calculates the matching degree between the total active power setpoint of the complementary integrated power supply and the start-up and shutdown status of the clean energy power unit, and determines whether start-up and shutdown operations of the clean energy power unit are required. (S4300) If the non-matching quantification value is greater than 0, then find the operation suggestion to shut down the generating wind turbine and the operation suggestion to shut down the generating photovoltaic unit. (S4400) If the mismatch quantification value is less than 0, then find operational suggestions to start up available but not generating wind turbine units, and find operational suggestions to start up available but not generating photovoltaic units. The regulation of the energy storage power unit by the complementary integrated unit includes: S4500) calculates the charge / discharge correction power of the energy storage power unit: S4510) Periodically update the actual rated charge and discharge power of the energy storage power unit according to the ideal rated charge and discharge power of the energy storage power unit; S4520) Sets the battery charge and discharge threshold values ​​for the energy storage power unit; S4530) calculates the charge and discharge correction power when the overall capacity ratio of the cell charge r is less than 50%; S4540) calculates the charge / discharge correction power when the overall capacity ratio of the cell charge r > 50%; The target active power value of the energy storage power unit calculated by the S4600 complementary integrated unit includes: S4610) Add the total active power setpoint of the complementary integrated power supply to the unit primary frequency regulation target adjustment of the clean energy power supply unit, and then subtract the actual active power output value of the clean energy power supply unit to obtain the active power output deviation of the clean energy power supply unit. S4620) initializes the compensation adjustment amount of the energy storage power unit to the active power output deviation of the clean energy power unit, and then compares the compensation adjustment amount with the current active power output deviation at a fixed period: S4621) When the absolute value of the difference between the two is greater than the dead zone of the active power regulation of the energy storage power unit, the compensation regulation amount of the energy storage power unit is equal to the current active power output deviation. S4622) When the absolute value of the difference between the two is less than or equal to the dead zone of the active power regulation of the energy storage power unit, the compensation regulation amount of the energy storage power unit remains unchanged. S4630) performs dead-zone processing on the compensation adjustment of the energy storage power unit; The target value of the active power of the energy storage power unit (S4640) is equal to the compensation adjustment amount of the energy storage power unit after dead zone processing minus the charge and discharge correction power of the energy storage power unit. The S4700 complementary integrated unit sends the unit's active power target value to the energy storage power unit; The energy storage power unit performs unit-level AGC allocation on the obtained unit active power target value and adjusts the active power of each energy storage unit.

9. The active power control strategy for connecting energy storage power sources and clean energy sources in a network as described in claim 8, characterized in that, The specific steps for the complementary integrated unit to adjust the clean energy unit are as follows: S4100) Calculates the active power capacity of the clean energy power supply unit within the future time period T1: S4110) Calculate the lower limit of the active power capacity of the clean energy power supply unit at each time point in the future time T1: S4111) If the power grid dispatching has issued the active power plan curve of the complementary integrated power source in advance, then the total active power set value of the complementary integrated power source at each time point in the future T1 time period is subtracted from the rated capacity of the positive unit active power of the energy storage power source unit to obtain the lower limit of the unit active power capacity of the clean energy power source unit at each time point in the future T1 time period. S4112) If the grid dispatch does not issue the active power plan curve of the complementary integrated power source in advance, the total active power set value of the current complementary integrated power source is reduced by the rated active power capacity of the forward unit of the energy storage power source unit, which is used as the lower limit of the unit active power capacity of the clean energy power source unit at each time point in the future T1 time period. S4120) Calculate the upper limit of the active power capacity of the clean energy power supply unit at each time point in the future time T1: S4121) If the power grid dispatching has issued the active power plan curve of the complementary integrated power source in advance, then the total active power set value of the complementary integrated power source at each time point in the future T1 time period is subtracted from the negative unit active power rated capacity of the energy storage power unit to obtain the upper limit of the unit active power capacity of the clean energy power source unit at each time point in the future T1 time period. S4122) If the grid dispatch does not issue the active power plan curve of the complementary integrated power source in advance, the total active power set value of the current complementary integrated power source is subtracted from the negative unit active power rated capacity of the energy storage power unit to obtain the upper limit of the unit active power capacity of the clean energy power source unit at each time point in the future T1 time period. S4130) The active power capacity of the clean energy power supply unit in the future time T1 is the intersection of the active power capacity of the clean energy power supply unit at each time point in the future time T1. The S4200 calculates the matching degree between the total active power setpoint of the complementary integrated power supply and the start-up and shutdown status of the clean energy power unit, and determines whether start-up and shutdown operations of the clean energy power unit are required. S4210) Set the threshold parameter for suggesting start-up and shutdown operations; S4220) Calculates the quantified value of the mismatch between the current start-up and shutdown status of the clean energy power unit and the setpoint of the total active power of the complementary integrated power supply within the future time T1: S4221) Calculate the upper limit mismatch degree of the range. Subtract the upper limit of the active power tolerance range of the clean energy power supply unit within the future T1 time from the upper limit of the possible fluctuation range of the active power of the clean energy power supply unit within the future T1 time. Then judge the calculation result. If it is greater than 0, the upper limit mismatch degree of the range is equal to the calculation result; otherwise, the upper limit mismatch degree of the range is equal to 0. S4222) Calculate the range lower limit mismatch degree by subtracting the lower limit of the active power capacity range of the clean energy power supply unit in the future T1 time from the lower limit of the active power capacity range of the clean energy power supply unit in the future T1 time, and judge the calculation result. If it is greater than 0, the range lower limit mismatch degree is equal to the calculation result; otherwise, the range lower limit mismatch degree is equal to 0. S4223) Subtract the lower limit mismatch from the upper limit mismatch to obtain the quantitative value of the mismatch between the current clean energy power unit's start-up and shutdown status and the set value of the total active power of the complementary integrated power supply in the future time T1. (S4230) Compare the absolute value of the mismatch quantification with the judgment threshold parameter. If the former is less than the latter, terminate step S4200; otherwise, proceed to the following steps to improve the matching degree between the clean energy power unit's start-up and shutdown status and the setpoint value of the total active power of the complementary integrated power supply within the future time T1: S4231) If the quantified value is not matched, proceed to step S4300 to find operation suggestions for shutting down the wind turbine generator and the photovoltaic generator, respectively. S4232) If the quantified value is not matched, proceed to step S4400 to find operation suggestions for starting up unpowered but usable wind turbine units and operation suggestions for starting up unpowered but usable photovoltaic units respectively. S4300) Seeking operational recommendations for shutting down power-generating wind turbines and power-generating photovoltaic units, including: S4310) Set variable v1, with an initial value of 1; S4320) If v1 is less than or equal to the length of the clean energy unit shutdown sequence, then set the original mismatched metric variable, and the original mismatched metric variable is equal to the absolute value of the mismatched metric obtained in S4223; otherwise, jump to step S4350. S4330) Calculate the quantified value of the mismatch between the range of sorted v1 in the sequence of possible fluctuations of active power corresponding to the shutdown sequence of clean energy units and the set value of the total active power of complementary integrated power supply in the future T1 time: S4331) Subtract the upper limit of the range of sorted v1 in the sequence of possible fluctuations of active power corresponding to the shutdown sequence of clean energy units from the upper limit of the unit active power capacity range of clean energy power supply units in the future T1 time, and judge the calculation result. If it is greater than 0, the mismatch degree of the upper limit of the range is equal to the calculation result; otherwise, the mismatch degree of the upper limit of the range is equal to 0. S4332) Subtract the lower limit of the active power capacity range of the clean energy power supply unit within the future time T1 from the lower limit of the range of sorted v1 in the active power fluctuation range sequence corresponding to the shutdown sequence of the clean energy unit, and judge the calculation result. If it is greater than 0, the lower limit mismatch degree is equal to the calculation result; otherwise, the lower limit mismatch degree is equal to 0. S4333) Subtract the lower limit mismatch degree from the upper limit mismatch degree obtained in S4332 to obtain the quantified value of the mismatch between the range of sorted v1 in the active power possible fluctuation range sequence corresponding to the shutdown sequence of clean energy units and the set value of the total active power of complementary integrated power supply in the future time T1. S4340) Subtract the absolute value of the mismatched metric obtained in S4333 from the original mismatched metric variable, and perform the following operations based on the calculation result: S4341) If the calculation result is greater than or equal to the judgment threshold parameter set in S4210, then v1 = v1 + 1. If v1 is greater than the clean energy unit shutdown sequence length at this time, then jump to step S4350; otherwise, update the original mismatched metric variable to the absolute value of the mismatched metric obtained in S4333, and jump to step S4330 to continue execution; S4342) If the calculation result is less than the judgment threshold parameter set in S4210, then jump to step S4350 to continue execution; S4350) Generate operation suggestions based on the value of variable v1: S4351) If v1=1, no operation suggestions are generated; S4352) If v1 > 1, then generate a shutdown operation suggestion, suggesting that shutdown operations be performed on the clean energy units corresponding to sequence 1 to v1-1 in the clean energy unit shutdown sequence; S4400) Recommendations for starting up available but not generating wind turbine units and for starting up available but not generating photovoltaic units are as follows: S4410) Set variable v2, with an initial value of 1; (S4420) If v2 is less than or equal to the clean energy unit start-up sequence length, then set the original mismatched metric variable, which is equal to the absolute value of the mismatched metric obtained in S4223; otherwise, proceed to step S4450. S4430) Calculates the quantified value of the mismatch between the range of sorted v2 in the sequence of possible active power fluctuations corresponding to the start-up sequence of clean energy units and the setpoint of the total active power of the complementary integrated power supply within the future time T1: S4431) Subtract the upper limit of the active power tolerance range of the clean energy power supply unit in the sequence of possible fluctuations in active power corresponding to the start-up sequence of the clean energy unit from the upper limit of the range of sorted v2 in the sequence of possible fluctuations in active power corresponding to the start-up sequence of the clean energy unit, obtained by S4130, and judge the calculation result. If it is greater than 0, the mismatch degree of the upper limit of the range is equal to the calculation result; otherwise, the mismatch degree of the upper limit of the range is equal to 0. S4432) Subtract the lower limit of the range of sorted v2 in the sequence of possible fluctuations in active power corresponding to the start-up sequence of the clean energy unit from the lower limit of the active power tolerance range of the clean energy power supply unit in the sequence of possible fluctuations in active power corresponding to the start-up sequence of the clean energy unit, and judge the calculation result. If it is greater than 0, the mismatch degree of the lower limit of the range is equal to the calculation result; otherwise, the mismatch degree of the lower limit of the range is equal to 0. S4433) Subtract the lower limit mismatch degree from the upper limit mismatch degree obtained in S4432 to obtain the quantified value of the mismatch between the range of sorted v2 in the active power possible fluctuation range sequence corresponding to the clean energy unit start-up sequence and the set value of the total active power of the complementary integrated power supply in the future T1 time. S4440) Subtract the absolute value of the mismatched metric obtained by S4433 from the original mismatched metric variable, and perform the following operations based on the calculation result: S4441) If the calculation result is greater than or equal to the judgment threshold parameter set in S4210, then v2 = v2 + 1. If v2 is greater than the start-up sequence length of the clean energy unit at this time, then jump to step S4450. Otherwise, update the original mismatch quantified value variable to the absolute value of the mismatch quantified value obtained in S4433, and jump to step S4430 to continue execution. S4442) If the calculation result is less than the judgment threshold parameter set in S4210, then proceed to step S4450 to continue execution; S4450) Generate operation suggestions based on the value of variable v2: S4451) If v2=1, no operation suggestions are generated; S4452) If v2 > 1, then generate a startup operation suggestion, suggesting that startup operations be performed on the clean energy units corresponding to sequence 1 to v2-1 in the clean energy unit startup sequence.

10. The active power control strategy for connecting energy storage power sources and clean energy sources in the network as described in claim 8, characterized in that, The complementary integrated unit calculates the charge / discharge correction power of the energy storage power unit as follows: S4510) Calculate the actual rated charge and discharge power of the energy storage power unit, including: S4511) Input the preset proportional parameters w1, w2 and the dead zone for charging and discharging power changes; S4512) Calculate the ideal rated charge / discharge power of the energy storage power unit, ideal rated charge / discharge power = min[ , w2× clean energy power supply unit's actual active power output], where min[] is the function for finding the minimum value; where: and These are the maximum and minimum battery charge values ​​for energy storage unit i, respectively. S4513) Initially, the actual rated charge and discharge power of the energy storage power unit is set to the ideal rated charge and discharge power, and the actual rated charge and discharge power is compared with the ideal rated charge and discharge power at a fixed period: When the absolute value of the difference between the two is less than the preset dead zone of the charge and discharge power change, the actual rated charge and discharge power remains unchanged; otherwise, the actual rated charge and discharge power is updated to the current ideal rated charge and discharge power. The battery charge / discharge threshold values ​​for the S4520 energy storage power unit are set as follows: S4521) When the total battery capacity is in an ideal state, the charge / discharge threshold value is negative to prevent the battery from being charged or discharged. S4522) When the total battery charge is at a low or high charge level, the charge / discharge threshold value is 0; S4523) When the total battery charge is in a state of extremely low or extremely high charge, the charge / discharge threshold value is β, where β is a parameter set between 0 and the primary frequency modulation threshold of the complementary integrated power supply. S4524) When the total battery charge is in a relatively ideal state, the charging and discharging threshold value remains unchanged. S4530) Calculate the charge / discharge correction power when the overall capacity ratio of the cell charge r < 50%: S4531) When the actual frequency of the power grid is less than or equal to the rated frequency of the power grid minus the battery charging and discharging threshold, the charging and discharging correction power is 0. S4532) When the actual frequency of the power grid is greater than the rated frequency of the power grid minus the battery charging and discharging threshold, the charging and discharging correction power is the actual rated charging and discharging power. S4540) Calculates the charge / discharge correction power when the overall capacity ratio r of the cell charge is greater than 50%: S4541) When the actual frequency of the power grid is greater than or equal to the rated frequency of the power grid plus the battery charging and discharging threshold, the charging and discharging correction power is 0. S4542) When the actual frequency of the power grid is less than the rated frequency of the power grid plus the battery charging and discharging threshold, the charging and discharging correction power is the negative value of the actual rated charging and discharging power obtained in S4513. The complementary integration unit performs dead-zone processing on the compensation adjustment amount as follows: S4631) Set the timer and time parameter T3; S4632) When the absolute value of the active power output deviation of the clean energy power supply unit is less than or equal to the unit output dead zone of the clean energy power supply unit, the timer starts counting. S4633) When the absolute value of the active power output deviation of the clean energy power supply unit is greater than the dead zone of the unit output of the clean energy power supply unit, the timer is reset to zero. (S4634) When the timer time is less than the time parameter T3, the compensation adjustment amount of the energy storage power unit is equal to the compensation adjustment amount of the energy storage power unit obtained in S4620. (S4635) When the timer time is greater than or equal to the time parameter T3, the compensation adjustment amount of the energy storage power unit is equal to 0.

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