A new energy station active power control method and system

Abstract

The application belongs to the field of automatic control of power systems, and discloses a new energy station active power control method, which comprises the following steps: obtaining power regulation speed and power regulation accuracy of each unit of the new energy station; when the power instruction regulation amount of the new energy station is less than a first power threshold, distributing the power of each unit according to the power regulation accuracy of each unit; when the power instruction regulation amount of the new energy station is greater than or equal to the first power threshold, distributing the power of each unit according to the comprehensive evaluation index of each unit; when the difference between the actual output power of the new energy station and the power instruction regulation amount of the new energy station is less than or equal to a second power threshold, and the power instruction regulation amount of the new energy station is less than a regulation amount threshold, adjusting the power of each unit to the average power. The new energy station active power control method of the embodiment can balance the active power regulation speed and regulation accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic control of power systems, and in particular to a new energy station active power control method and system. BACKGROUND

[0002] To achieve the double carbon goal, the installed capacity of wind power and photovoltaic power generation in China continues to increase. High proportion of new energy and high proportion of power electronic equipment have become key factors affecting the stability of the power system. The "GB 38755-2019 Power System Safety and Stability Guide" clearly states that all types of power sources should have primary frequency modulation capability. "GB / T 40289-2021 Photovoltaic Power Station Power Control System Technical Requirements" and "GB / T 19963.1-2021 Wind Power Plant Access to Power System Technical Regulations Part 1: Land-based Wind Power" respectively stipulate that the difference between the active power of the power control system of the photovoltaic power station and the wind power plant and the command value shall not exceed ±1% of the rated power of the power station.

[0003] In related technologies, the automatic generation control system (AGC) realizes differentiated active power control based on the characteristics of the unit, but the AGC response period is too long, generally 15 seconds; the fast frequency response device is affected by the communication channel blockage, and generally controls the active power of each unit according to the capacity of the unit, and the control accuracy is poor. Therefore, the existing automatic generation control system cannot balance the active power regulation speed and regulation accuracy.

[0004] How to provide a method that can balance the active power regulation accuracy and regulation speed of the new energy station is a problem to be solved at present. SUMMARY

[0005] The embodiments of the present application provide a new energy station active power control method and system to solve the problem that the existing automatic generation control system cannot balance the active power regulation speed and regulation accuracy. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This part is not a general review, nor is it intended to determine the key / important elements or delineate the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0006] According to a first aspect of the embodiments of the present application, a new energy station active power control method is provided.

[0007] In one embodiment, a new energy station active power control method comprises:

[0008] Obtaining the power regulation speed and power regulation accuracy of each unit of the new energy station;

[0009] when the power instruction adjustment amount of the new energy station is less than the first power threshold, distributing power of each unit according to an order of power adjustment accuracy of each unit;

[0010] when the power instruction adjustment amount of the new energy station is greater than or equal to the first power threshold, distributing power of each unit according to a comprehensive evaluation index of each unit, the comprehensive evaluation index of each unit being obtained according to the power instruction adjustment amount of the new energy station and power adjustment speed and power adjustment accuracy of each unit;

[0011] when a difference between actual output power of the new energy station and the power instruction adjustment amount of the new energy station is less than or equal to a second power threshold, and the power instruction adjustment amount of the new energy station is less than an adjustment amount threshold, adjusting power of each unit to average power.

[0012] Optionally, the step of distributing power of each unit according to an order of power adjustment accuracy of each unit specifically comprises:

[0013] sequentially distributing full adjustment power to each unit according to an order of power adjustment accuracy of each unit from high to low until the power instruction adjustment amount of the new energy station is distributed.

[0014] Optionally, the step of distributing power of each unit according to a comprehensive evaluation index of each unit comprises:

[0015] a distribution proportion of power of each unit is a proportion of the comprehensive evaluation index of the unit in a sum of comprehensive evaluation indexes of all units, and a formula is as follows:

[0016]

[0017] wherein, ΔP i is a single-unit power instruction adjustment amount, i represents a unit number, ΔP ins is the power instruction adjustment amount of the new energy station, R scre_i is a single-unit comprehensive evaluation index, ∑R scre_n is a sum of comprehensive evaluation indexes of all units.

[0018] Optionally, a calculation formula of the comprehensive evaluation index is as follows:

[0019]

[0020] wherein, K radio is an adjustment coefficient for balancing power adjustment speed and power adjustment accuracy, R scre_i is a single-unit comprehensive evaluation index, i represents a unit number, ΔP ins is the power instruction adjustment amount of the new energy station, K spd_i is a single-unit power adjustment speed, K dif_i is a single-unit power adjustment accuracy, and ΔPmax is the maximum limit value of active power regulation of all units.

[0021] Optionally, the single-unit power regulation accuracy K dif_i The calculation formula is as follows:

[0022]

[0023] ΔP act_i is the actual active power regulation amount of a single unit, ΔP i is the single-unit power instruction regulation amount, P N_i is the rated power of a single unit, and i represents the unit number.

[0024] Optionally, the single-unit power regulation speed K spd_i The calculation formula is as follows:

[0025]

[0026] ΔP act_i is the actual active power regulation amount of a single unit, t is time, and P N_i is the rated power of a single unit.

[0027] Optionally, the regulation coefficient K radio is set to be equal to the proportion of the power regulation speed of all units and the proportion of the power regulation accuracy of all units in the comprehensive evaluation index when ΔP ins is 50% ΔP max is 50% ΔP ins is the power instruction regulation amount of the new energy station, ΔP max is the maximum limit value of active power regulation of all units.

[0028] ΔP ins is the power instruction regulation amount of the new energy station, ΔP max is the maximum limit value of active power regulation of all units.

[0029] Optionally, the step of regulating the power of each unit to the average power specifically includes:

[0030] According to the total power of the new energy station and the number of units, the average power of each unit is obtained;

[0031] The power of each unit is regulated to the average power.

[0032] According to a second aspect of an embodiment of the present application, a new energy station active power control system is provided.

[0033] In one embodiment, the new energy station active power control system includes:

[0034] The acquisition module is configured to obtain the power regulation speed and the power regulation accuracy of each unit of the new energy station.

[0035] The first control module is configured to allocate power of each unit in order of power regulation accuracy of each unit when the power instruction adjustment amount of the new energy station is less than the first power threshold value.

[0036] The second control module is configured to allocate power of each unit according to a comprehensive evaluation index of each unit when the power instruction adjustment amount of the new energy station is greater than or equal to the first power threshold value, the comprehensive evaluation index of each unit being obtained according to the power instruction adjustment amount of the new energy station and power regulation speed and power regulation accuracy of each unit.

[0037] The third control module is configured to adjust the power of each unit to an average power when a difference between the actual output power of the new energy station and the power instruction adjustment amount of the new energy station is less than or equal to a second power threshold value, and the power instruction adjustment amount of the new energy station is less than an adjustment amount threshold value.

[0038] Optionally, the first control module allocates power of each unit in order of power regulation accuracy of each unit, and specifically includes:

[0039] The power of each unit is allocated in order of power regulation accuracy of each unit from high to low, and the full adjustment power is allocated to the current unit in sequence until the power instruction adjustment amount of the new energy station is allocated.

[0040] Optionally, the second control module allocates power of each unit according to a comprehensive evaluation index of each unit, and specifically includes:

[0041] The allocation proportion of the power of each unit is a proportion of the comprehensive evaluation index of the unit to a sum of comprehensive evaluation indexes of all units, and the formula is as follows:

[0042]

[0043] Wherein, ΔP i is the power instruction adjustment amount of a single unit, i represents a unit number, ΔP ins is the power instruction adjustment amount of the new energy station, R scre_i is the comprehensive evaluation index of a single unit, ∑R scre_n is a sum of comprehensive evaluation indexes of all units.

[0044] Optionally, the formula for calculating the comprehensive evaluation index of a single unit is as follows:

[0045]

[0046] Wherein, K radio is an adjustment coefficient for balancing power regulation speed and power regulation accuracy, R scre_i is the comprehensive evaluation index of a single unit, i represents a unit number, ΔP ins is the power instruction adjustment amount of the new energy station, K spd_i is the power regulation speed of a single unit, and Kdif_i ΔP max is the maximum limit value of active power regulation of all units.

[0047] Optionally, the single-unit power regulation accuracy K dif_i The calculation formula is as follows:

[0048]

[0049] ΔP act_i is the actual active power regulation amount of a single unit, ΔP i is the single-unit power instruction regulation amount, P N_i is the rated power of a single unit, and i represents the unit number.

[0050] Optionally, the single-unit power regulation speed K spd_i The calculation formula is as follows:

[0051]

[0052] ΔP act_i is the actual active power regulation amount of a single unit, t is time, and P N_i is the rated power of a single unit.

[0053] Optionally, the regulation coefficient K radio is set to be equal to the proportion of the power regulation speed of all units and the proportion of the power regulation accuracy of all units in the comprehensive evaluation index when ΔP ins is 50% ΔP max .

[0054] ΔP ins is the power instruction regulation amount of the new energy station, ΔP max is the maximum limit value of active power regulation of all units.

[0055] Optionally, the third control module adjusts the power of each unit to the average power, and specifically comprises:

[0056] According to the total power of the new energy station and the number of units, the average power of each unit is obtained.

[0057] The power of each unit is adjusted to the average power.

[0058] According to a third aspect of an embodiment of the present application, a computer device is provided.

[0059] In some embodiments, the computer device comprises a memory and a processor, the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0060] The technical scheme provided by the embodiment of the present application can include the following beneficial effects:

[0061] When the active power instruction adjustment amount of the new energy station is small, the load is distributed according to the adjustment accuracy of the unit, so that the unit with high adjustment accuracy responds to power adjustment, and the unit with low adjustment accuracy does not respond to power adjustment.

[0062] When the active power instruction adjustment amount of the new energy station is large, the unit power is distributed according to the comprehensive evaluation index, so that the adjustment speed and the adjustment accuracy are balanced; the larger the active power instruction adjustment amount, the more power is allocated to the unit with faster adjustment speed; the smaller the active power instruction adjustment amount, the more power is allocated to the unit with higher adjustment accuracy.

[0063] When the power of the new energy station is stable, the average power of the unit is calculated by dividing the total power of the new energy station by the number of units, and the unit with power higher than the average power and the unit with power lower than the average power are adjusted to the average power, so that the power output of the unit is balanced.

[0064] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0065] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0066] Figure 1 is a photovoltaic power station system diagram according to an exemplary embodiment;

[0067] Figure 2 is a wind power station system diagram according to an exemplary embodiment;

[0068] Figure 3 is a flowchart of a new energy station active power control method according to an exemplary embodiment;

[0069] Figure 4 is a 2%P N station active power response comparison diagram under the average distribution mode and the adjustment accuracy priority mode under the power adjustment instruction;

[0070] Figure 5 is a 5%P N station active power response comparison diagram under the average distribution mode and the comprehensive evaluation index distribution mode under the power adjustment instruction;

[0071] Figure 6 is a 9%P NThe active power response comparison chart of the substation under the average distribution mode of the power regulation instruction and the comprehensive evaluation index distribution mode;

[0072] Figure 7 It is a schematic diagram of a new energy substation active power control system according to an exemplary embodiment;

[0073] Figure 8 It is a structural schematic diagram of a computer device according to an exemplary embodiment. DETAILED DESCRIPTION

[0074] The following description and drawings are sufficient to enable one skilled in the art to practice the embodiments herein. Portions and features of some embodiments can be included in, or alternative to, portions and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims and all available equivalents of the claims. In this document, the terms "first," "second," etc. are used merely to distinguish one element from another, and do not require or imply any actual relationship or order between the elements. Indeed, the first element could be termed the second element without changing the meaning of the description, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a structure, device, or apparatus that comprises a list of elements is not necessarily limited to only those elements, but can include other elements not expressly listed or inherent to such structure, device, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the structure, device, or apparatus that includes the element. Various embodiments are described in progression, each having different, additional, or modified features. It is intended that each embodiment can be combined with any other embodiment or portion thereof.

[0075] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like in the description and the claims indicate relative positions and orientations of the device or element shown in the drawings, and are used merely for convenience and brevity to aid in the description of the present document and are not intended to limit or impose a particular orientation, configuration, or operation of the device or element, and thus should not be construed as limiting the scope of the present document. In the description of the present document, unless otherwise specified and limited, the terms "mounting," "connected," "connection" should be interpreted broadly, for example, can be mechanical connection or electrical connection, can be internal communication of two elements, can be direct connection, or indirect connection through intermediate medium, and the specific meaning of the above terms can be understood by the person skilled in the art according to the specific circumstances.

[0076] In this article, the term "a plurality of" means two or more, unless otherwise specified.

[0077] In this article, the character " / " represents the relationship between the front and rear objects is "or". For example, A / B means: A or B.

[0078] In this article, the term "and / or" is a description of the relationship between the objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, three relationships.

[0079] In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other.

[0080] As shown in Figure 1 , the photovoltaic station is generally a centralized or distributed scheme, and a plurality of photovoltaic arrays are connected to the DC input end of the inverter through the current combiner, and the inverter outputs AC through IGBT (Insulated Gate Bipolar Transistor) or field effect tube, and is connected to the 110kV grid-connected transformer (a small number of higher voltage grade transformers are used) through the 10kV transformer, and then the power is input to the grid through the grid-connected point.

[0081] As shown in Figure 2 , the wind power station generally has one 10kV transformer (a small number of higher voltage grade transformers are used) for each fan, which is connected to the 110kV grid-connected transformer (a small number of higher voltage grade transformers are used) through the 10kV transformer, and then the power is input to the grid through the grid-connected point.

[0082] At present, the conventional active power control of new energy station mainly uses the average distribution method, and the active power is evenly distributed to each inverter or fan to realize the cluster active power response. The existing method lacks intelligent distribution for the active power response characteristics of a single inverter or fan. The embodiment of the application discloses a new energy station active power control method, when the active power instruction regulation amount is small, the unit with high regulation accuracy is preferentially called, and the number of response units is reduced, and the regulation accuracy of the new energy station is improved; when the active power instruction regulation amount is large, the unit with fast regulation speed is preferentially called, and the regulation speed of the new energy station is improved.

[0083] Figure 3 An embodiment of the new energy station active power control method of the application is shown.

[0084] In this optional embodiment, the new energy station active power control method comprises the following steps:

[0085] Step S1, acquiring the power regulation speed and power regulation accuracy of each unit of the new energy station;

[0086] Step S2, when the power instruction adjustment amount of the new energy station is less than the first power threshold, distributing the power of each unit according to the order of the power adjustment accuracy of each unit;

[0087] When the power instruction adjustment amount of the new energy station is greater than or equal to the first power threshold, distributing the power of each unit according to the comprehensive evaluation index of each unit, and the comprehensive evaluation index of each unit is obtained according to the power instruction adjustment amount of the new energy station and the power adjustment speed and power adjustment accuracy of each unit;

[0088] When the difference between the actual output power of the new energy station and the power instruction adjustment amount of the new energy station is less than or equal to the second power threshold, and the power instruction adjustment amount of the new energy station is less than the adjustment amount threshold, adjusting the power of each unit to the average power. The actual output power of the new energy station is the actual output power of all units of the new energy station.

[0089] Unless otherwise specified, the power of each embodiment of the present application refers to active power, for example, the power instruction adjustment amount, the power adjustment speed and the power adjustment accuracy are active power instruction adjustment amount, active power adjustment speed and active power adjustment accuracy respectively.

[0090] Optionally, the first power threshold is 3% to 5% of the rated power of the new energy station.

[0091] Optionally, the second power threshold is 0.5% to 1% of the rated power of the new energy station.

[0092] Optionally, the adjustment amount threshold is 0.2% to 1% of the rated power of the new energy station.

[0093] For example, the method of the above embodiment, when the power instruction adjustment amount of the new energy station is less than 3% of the rated power of the new energy station, distributing the power of each unit according to the order of the power adjustment accuracy of each unit from high to low; when the power instruction adjustment amount of the new energy station is greater than or equal to 3% of the rated power of the new energy station, distributing the power of each unit according to the comprehensive evaluation index of each unit; when the difference between the actual output power of the new energy station and the power instruction adjustment amount of the new energy station is less than or equal to 1% of the rated power of the new energy station, and the power instruction adjustment amount of the new energy station is less than 0.5% of the rated power of the new energy station, adjusting the power of each unit to the average power.

[0094] Optionally, the step of distributing the power of each unit according to the order of the power adjustment accuracy of each unit specifically includes:

[0095] According to the order of the power adjustment accuracy of each unit from high to low, the full adjustment power is distributed to the current unit in turn until the power instruction adjustment amount ΔP of the new energy station is less than the first power threshold. ins After distribution, that is, when

[0096] ∑ΔP i = ΔPins

[0097] ΔP i is a power instruction adjustment amount of a single unit, i represents a unit number, and ΔP ins is an active power instruction adjustment amount of the new energy station.

[0098] When the power instruction adjustment amount of the new energy station is less than the first power threshold, the method of the embodiment gives more power to the unit with higher power adjustment precision, so that the unit with high power adjustment precision is allocated adjustment power and is allocated full adjustment power, and the unit with low power adjustment precision is not allocated adjustment power, thereby reducing the number of responding units and improving the adjustment precision of the station.

[0099] Optionally, the step of allocating power to each unit according to the comprehensive evaluation index of each unit comprises:

[0100] The allocation ratio of the power of each unit is the ratio of the comprehensive evaluation index of the unit to the sum of the comprehensive evaluation indexes of all units, and the formula is as follows:

[0101]

[0102] wherein, ΔP i is a power instruction adjustment amount of a single unit, i represents a unit number, and ΔP ins is an active power instruction adjustment amount of the new energy station, and R scre_i is a comprehensive evaluation index of a single unit, and ∑R scre_n is the sum of the comprehensive evaluation indexes of all units.

[0103] Optionally, the comprehensive evaluation index of each unit is obtained according to the power instruction adjustment amount and the power adjustment speed and power adjustment precision of each unit. A calculation formula of the comprehensive evaluation index is given below, and of course, the formula is only illustrative, and those skilled in the art can also obtain the comprehensive evaluation index of each unit according to other formulas.

[0104]

[0105] wherein, R scre_i is a comprehensive evaluation index of a single unit, i represents a unit number, and K radio is an adjustment coefficient for balancing the power adjustment speed and the power adjustment precision, and ΔP ins is an active power instruction adjustment amount of the new energy station, and K spd_i is a power adjustment speed of a single unit, and K dif_i is a power adjustment precision of a single unit, and ΔP max is the maximum limit value of the active power adjustment of all units.

[0106] In the above embodiments, the power regulation accuracy K of a single unit in a new energy power station is... dif_i The actual active power regulation ΔP of a single generating unit act_i Power command adjustment amount ΔP of a single unit i The difference between the rated power P of a single unit and the value of the difference between the two units is P. N_i The reciprocal of the absolute value of the ratio, that is:

[0107]

[0108] Here, different load conditions and power increase / decrease amounts can be set to achieve segmented command-load deviation rate assessment under different operating conditions, and obtain the power regulation accuracy K of a single unit in a new energy power station under different operating conditions and segments. dif .

[0109] In the above embodiments, the power regulation speed K of a single unit in a new energy power station is... spd_i The unit power regulation per unit time is equal to the unit's rated power P. N_i The ratio, that is:

[0110]

[0111] In the formula, ΔP act_i P represents the actual active power regulation of a single generating unit, where t is time. N_i This refers to the rated power of a single unit.

[0112] Optionally, the adjustment coefficient K radio Set as: when ΔP ins 50% ΔP max At that time, the weight of the power regulation speed of all units and the weight of the power regulation accuracy of all units in the comprehensive evaluation index are equal, that is:

[0113]

[0114] According to the calculation formula of the above comprehensive evaluation index, K radio The larger the value, the higher the evaluation index for units with high power regulation accuracy. radio The smaller the value, the higher the evaluation index for a unit with faster power regulation speed. Of course, those skilled in the art can also obtain comprehensive evaluation indexes for each unit using other formulas based on actual needs.

[0115] When the power instruction adjustment amount of the new energy station is greater than or equal to the first power threshold, that is, the active power instruction adjustment amount of the new energy station is relatively large, the method of the embodiment is used to distribute the power of the units according to the comprehensive evaluation index, to balance the power adjustment speed and the power adjustment accuracy through the comprehensive evaluation index, the greater the power instruction adjustment amount, the more power is distributed to the unit with faster adjustment speed, and the smaller the active power instruction adjustment amount, the more power is distributed to the unit with higher adjustment accuracy.

[0116] Optionally, the step of adjusting the power of each unit to the average power comprises: obtaining the average power of each unit according to the total power of the new energy station and the number of units; and adjusting the power of each unit to the average power. Specifically, the average power of each unit is calculated by dividing the total power of the new energy station by the number of units; and the units with power higher than the average power and the units with power lower than the average power are adjusted to the average power, so as to balance the power output of the units.

[0117] When the difference between the power of the new energy station and the power instruction of the new energy station is less than the second power threshold, and the power instruction adjustment amount of the new energy station is less than the adjustment amount threshold, the power of the new energy station is stable, the average power of each unit is calculated by dividing the total power of the new energy station by the number of units, and the units with power higher than the average power and the units with power lower than the average power are adjusted to the average power, so as to balance the power output of the units.

[0118] A specific embodiment of the new energy station power control method of the application is given below.

[0119] The embodiment is a centralized photovoltaic power station, 1 35kV single bus is arranged in the station, 5 photovoltaic incoming lines are used, the system inverter is boosted to 35kV and then flows into a 100MVA main transformer, and power is generated through 220kV voltage level grid connection. The photovoltaic component in the station is 100MW, and 1000 inverters are used, each inverter is provided with a 0.1MW photovoltaic array. Each inverter and the photovoltaic array connected to the inverter are a power generation unit. The adjustment speed of 1000 power generation units basically meets the average distribution of 1.0%P N / s-2.6%P N / s, and the adjustment accuracy meets the average distribution of-3%P N +3%P N .

[0120] The calculation formula of the comprehensive evaluation index of each unit in the embodiment is:

[0121]

[0122] K radio is an adjustment coefficient for balancing the power adjustment speed and the power adjustment accuracy, K radioΔP max is the maximum limit of all unit power regulation, in this embodiment, ΔP max is 10%P N , P N is the rated power of all units.

[0123] In this embodiment, the power instruction regulation amount of the new energy station is less than 3% of the rated capacity of the new energy station, the load is distributed according to the power regulation accuracy of the unit in order, and 8%P N is distributed in turn.

[0124] In a 2% rated capacity power regulation process of the new energy station, the theoretical regulation increment of the entire new energy station is 2MW, the power increment stable value of the average distribution method is 1.9060MW, and the power regulation accuracy of the new energy station is 4.7%; the power increment stable value of the control method of this embodiment is 2.0008MW, the power regulation accuracy of the new energy station is 0.04%, the number of responding units is reduced from 1000 to 250, and the regulation accuracy is improved by 2 orders of magnitude compared with the average distribution method, as shown in Figure 4 .

[0125] In this embodiment, the power instruction regulation amount of the new energy station is greater than or equal to 3% of the rated capacity of the new energy station, the load is distributed according to the comprehensive evaluation index of the unit, and the distribution proportion is the proportion of the comprehensive evaluation index of the unit in the sum of the comprehensive evaluation indexes of all units, that is, The power distribution is as follows:

[0126]

[0127] ΔP i is the power allocated to a single unit, and ΔP ins is the power instruction regulation amount of the entire new energy station.

[0128] In a 5% rated capacity power regulation process of the new energy station, the theoretical regulation increment of the entire new energy station is 5MW, the power increment stable value of the average distribution method is 4.9637MW, and the regulation time is 6.30s; the power increment stable value of the control method of this embodiment is 4.9637MW, the regulation time is 4.27s, and the regulation speed is improved by 2.03s compared with the average distribution method, as shown in Figure 5 .

[0129] In a 9% rated capacity power regulation process of the new energy station, the theoretical regulation increment of the entire new energy station is 9MW, the power increment stable value of the average distribution method is 8.9681MW, and the regulation time is 9.80s; the power increment stable value of the control method of this embodiment is 8.9681MW, the regulation time is 6.30s, and the regulation speed is improved by 3.50s compared with the average distribution method, asFigure 6 As shown.

[0130] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] In another embodiment, a power control system for a new energy power station is also disclosed, such as... Figure 7 As shown, the system includes: a data acquisition module for acquiring the power regulation speed and power regulation accuracy of each unit in the new energy power station; a first control module for allocating the power of each unit according to the power regulation accuracy order when the power command regulation amount of the new energy power station is less than a first power threshold; a second control module for allocating the power of each unit according to the comprehensive evaluation index of each unit when the power command regulation amount of the new energy power station is greater than or equal to the first power threshold, wherein the comprehensive evaluation index of each unit is obtained based on the power command regulation amount of the new energy power station and the power regulation speed and power regulation accuracy of each unit; and a third control module for adjusting the power of each unit to the average power when the difference between the power of the new energy power station and the power command regulation amount of the new energy power station is less than a second power threshold, and the power command regulation amount of the new energy power station is less than the regulation amount threshold.

[0132] The active power control system for new energy power plants disclosed in this embodiment is based on the same principle as the active power control methods for new energy power plants disclosed in the above embodiments, and will not be repeated here.

[0133] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 8 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores static and dynamic information data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps in the above method embodiments.

[0134] Those skilled in the art will understand that Figure 8The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0135] In one embodiment, a computer device is also provided, including a memory and a processor, the memory storing a computer program, and the processor implementing the steps in the above method embodiments when executing the computer program.

[0136] In one embodiment, a computer readable storage medium is provided, storing a computer program, and the computer program is executed by a processor to implement the steps in the above method embodiments.

[0137] A person of ordinary skill in the art can understand that all or part of the processes in the above method embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium and can include the processes of the above embodiments when executed. Any reference to memory, storage, database or other medium in the embodiments of the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM can be in various forms such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0138] The present application is not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A method for active power control of a new energy plant station, characterized in that, The method comprises: acquiring power regulation speed and power regulation accuracy of each unit of the new energy station; when the power instruction regulation amount of the new energy station is less than the first power threshold, assigning full regulation power to the current unit in turn according to the power regulation accuracy of each unit from high to low until the power instruction regulation amount of the new energy station is assigned completely; when the power instruction regulation amount of the new energy station is greater than or equal to the first power threshold, the distribution proportion of the power of each unit is the proportion of the comprehensive evaluation index of the unit in the sum of comprehensive evaluation indexes of all units, and the comprehensive evaluation index of each unit is obtained according to the power instruction regulation amount of the new energy station and the power regulation speed and power regulation accuracy of each unit; when the difference between the actual output power of the new energy station and the power instruction regulation amount of the new energy station is less than or equal to the second power threshold and the power instruction regulation amount of the new energy station is less than the regulation amount threshold, regulating the power of each unit to the average power; the calculation formula of the comprehensive evaluation index is: wherein K radio is a regulation coefficient for balancing the power regulation speed and the power regulation accuracy, R scre_i is a single unit comprehensive evaluation index, i represents the unit number, ΔP ins is a power instruction regulation amount of the new energy station, K spd_i is a single unit power regulation speed, K dif_i is a single unit power regulation accuracy, ΔP max is a maximum limit value of active power regulation of all units; The single unit power regulation accuracy K dif_i The calculation formula is as follows: ΔP act_i is the actual active power regulation amount of a single unit, ΔP i is the power instruction regulation amount of a single unit, P N_i is the rated power of a single unit, and i represents the unit number; The single unit power regulation speed K spd_i The calculation formula is as follows: ΔP act_i Pactis the actual active power regulation amount of a single unit, t is time, P N_i Pn is the rated power of a single unit.

2. The active power control method of the new energy station according to claim 1, characterized in that, the calculation formula of the distribution proportion of the power of each unit is as follows: Wherein, ΔP i is the power instruction adjustment amount of a single unit, i represents the unit number, ΔP ins is the power instruction adjustment amount of a new energy station, P scre_i is the comprehensive evaluation index of a single unit, and ∑R scre_n is the comprehensive evaluation index of all units.

3. The active power control method of the new energy station according to claim 1, characterized in that, The adjustment coefficient K radio is set as: when ΔP ins is 50% ΔP max , make the proportion of all unit power regulation speed and the proportion of all unit power regulation accuracy in the comprehensive evaluation index equal. ΔP ins is the power instruction adjustment quantity of the new energy station, ΔP max is the maximum limit of active power adjustment of all units.

4. The method of claim 1, wherein, the step of regulating the power of each unit to the average power specifically comprises: acquiring the average power of each unit according to the total power of the new energy station and the number of units; regulating the power of each unit to the average power.

5. A new energy plant active power control system, characterized in that, The system comprises: a collection module for acquiring power regulation speed and power regulation accuracy of each unit of the new energy station; a first control module for, when the power instruction regulation amount of the new energy station is less than the first power threshold, assigning full regulation power to the current unit in turn according to the power regulation accuracy of each unit from high to low until the power instruction regulation amount of the new energy station is assigned completely; a second control module for, when the power instruction regulation amount of the new energy station is greater than or equal to the first power threshold, obtaining the distribution proportion of the power of each unit as the proportion of the comprehensive evaluation index of the unit in the sum of comprehensive evaluation indexes of all units, and obtaining the comprehensive evaluation index of each unit according to the power instruction regulation amount of the new energy station and the power regulation speed and power regulation accuracy of each unit; a third control module for, when the difference between the actual output power of the new energy station and the power instruction regulation amount of the new energy station is less than or equal to the second power threshold and the power instruction regulation amount of the new energy station is less than the regulation amount threshold, regulating the power of each unit to the average power; the calculation formula of the comprehensive evaluation index is: wherein, K radio is an adjustment coefficient for balancing the power adjustment speed and the power adjustment accuracy, R scre_i is a single unit comprehensive evaluation index, i represents the unit number, ΔP ins is the power instruction adjustment amount of the new energy station, K spd_i is the power adjustment speed of a single unit, K dif_i is the power adjustment accuracy of a single unit, ΔP max is the maximum limit value of active power adjustment of all units; The single unit power regulation accuracy K dif_i The calculation formula is as follows: ΔP act_i is the actual active power regulation amount of a single unit, ΔP i is the power instruction regulation amount of a single unit, P N_i is the rated power of a single unit, and i represents the unit number; The single unit power regulation speed K spd_i The calculation formula is as follows: ΔP act_i Pact is the actual active power regulation amount of the single unit, t is time, P N_i Pn is the rated power of the single unit.

6. The new energy plant active power control system according to claim 5, characterized in that, the calculation formula of the distribution proportion of the power of each unit is as follows: Wherein, ΔP i is the power instruction adjustment amount of a single unit, i represents the unit number, ΔP ins is the power instruction adjustment amount of a new energy station, R scre_i is the comprehensive evaluation index of a single unit, and ∑R scre_n is the comprehensive evaluation index of all units.

7. The active power control system of the new energy station according to claim 5, characterized in that, The adjustment coefficient K radio is set to be: when ΔP ins is 50%ΔP max , make the proportion of all unit power regulation speed and the proportion of all unit power regulation accuracy in the comprehensive evaluation index equal. ΔP ins is the power instruction adjustment amount of the new energy station, ΔP max is the maximum limit of active power adjustment of all units.

8. The new energy plant active power control system according to claim 5, characterized in that, the third control module regulates the power of each unit to the average power, specifically comprising: acquiring the average power of each unit according to the total power of the new energy station and the number of units; regulating the power of each unit to the average power. 9.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-8 when the computer program is executed by the processor. The processor implements an active power control method of a new energy station when executing the computer program, and the method comprises: acquiring power regulation speed and power regulation accuracy of each unit of the new energy station; When the power instruction adjustment amount of the new energy station is less than the first power threshold, the current unit is allocated full adjustment power in turn according to the order from high to low of the power adjustment accuracy of each unit until the power instruction adjustment amount of the new energy station is allocated completely. When the power instruction adjustment amount of the new energy station is greater than or equal to the first power threshold, the distribution proportion of the power of each unit is the proportion of the comprehensive evaluation index of the unit in the sum of the comprehensive evaluation indexes of all units, and the comprehensive evaluation index of each unit is obtained according to the power instruction adjustment amount of the new energy station and the power adjustment speed and the power adjustment accuracy of each unit. When the difference between the actual output power of the new energy station and the power instruction adjustment amount of the new energy station is less than or equal to the second power threshold, and the power instruction adjustment amount of the new energy station is less than the adjustment amount threshold, the power of each unit is adjusted to the average power. The calculation formula of the comprehensive evaluation index is: wherein K radio is a regulation coefficient for balancing the power regulation speed and the power regulation accuracy, R scre_i is a single-unit comprehensive evaluation index, i represents the unit number, ΔP ins is a power instruction regulation amount of the new energy station, K spd_i is a single-unit power regulation speed, K dif_i is a single-unit power regulation accuracy, ΔP max is a maximum limit value of active power regulation of all units; The single unit power regulation accuracy K dif_i The calculation formula is as follows: ΔP act_i is the actual active power regulation amount of a single unit, ΔP i is the power instruction regulation amount of a single unit, P N_i is the rated power of a single unit, and i represents the unit number; The single unit power regulation speed K spd_i The calculation formula is as follows: ΔP act_i Pact is the actual active power regulation amount of the single unit, t is time, P N_i rat is the rated power of the single unit.

10. The computer device of claim 9, wherein, The calculation formula of the distribution proportion of the power of each unit is as follows: Wherein, ΔP i is the power instruction adjustment amount of a single unit, i represents the unit number, ΔP ins is the power instruction adjustment amount of a new energy station, R scre_i is the comprehensive evaluation index of a single unit, and ∑R scre_n is the comprehensive evaluation index of all units.

11. The computer device of claim 9, wherein, The adjustment coefficient K radio is set to be: when ΔP ins is 50% ΔP max , make the proportion of all unit power regulation speed and the proportion of all unit power regulation accuracy in the comprehensive evaluation index equal. ΔP ins is the power instruction adjustment amount of the new energy station, ΔP max is the maximum limit of active power adjustment of all units.

12. The computer device of claim 9, wherein, The step of adjusting the power of each unit to the average power specifically comprises: obtaining the average power of each unit according to the total power of the new energy station and the number of units; and adjusting the power of each unit to the average power.

13. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement a new energy station active power control method, and the method comprises: obtaining the power adjustment speed and the power adjustment accuracy of each unit of the new energy station; When the power instruction adjustment amount of the new energy station is less than the first power threshold, the current unit is allocated full adjustment power in turn according to the order from high to low of the power adjustment accuracy of each unit until the power instruction adjustment amount of the new energy station is allocated completely. When the power instruction adjustment amount of the new energy station is greater than or equal to the first power threshold, the distribution proportion of the power of each unit is the proportion of the comprehensive evaluation index of the unit in the sum of the comprehensive evaluation indexes of all units, and the comprehensive evaluation index of each unit is obtained according to the power instruction adjustment amount of the new energy station and the power adjustment speed and the power adjustment accuracy of each unit. When the difference between the actual output power of the new energy station and the power instruction adjustment amount of the new energy station is less than or equal to the second power threshold, and the power instruction adjustment amount of the new energy station is less than the adjustment amount threshold, the power of each unit is adjusted to the average power. The calculation formula of the comprehensive evaluation index is: wherein K radio is an adjustment coefficient for balancing the power adjustment speed and the power adjustment accuracy, R scre_i is a comprehensive evaluation index of a single unit, i represents a unit number, ΔP ins is a power instruction adjustment amount of a new energy station, K spd_i is a power adjustment speed of a single unit, K dif_i is a power adjustment accuracy of a single unit, ΔP max is a maximum limit value of active power adjustment of all units; The single unit power regulation accuracy K dif_i The calculation formula is as follows: ΔP act_i is the actual active power regulation amount of a single unit, ΔP i is the power instruction regulation amount of a single unit, P N_i is the rated power of a single unit, and i represents the unit number; The single unit power regulation speed K spd_i The calculation formula is as follows: ΔP act_i Pact is the actual active power regulation amount of the single unit, t is time, P N_i is the rated power of the single unit.

14. The computer readable storage medium of claim 13, wherein, The calculation formula of the distribution proportion of the power of each unit is as follows: Wherein, ΔP i is the power instruction adjustment amount of a single unit, i represents the unit number, ΔP ins is the power instruction adjustment amount of a new energy station, R scre_i is the comprehensive evaluation index of a single unit, and ∑R scre_n is the comprehensive evaluation index of all units.

15. The computer readable storage medium of claim 13, wherein, The adjustment coefficient K radio is set to be: when ΔP ins is 50% ΔP max , make the proportion of all unit power regulation speed and the proportion of all unit power regulation accuracy in the comprehensive evaluation index equal. ΔP ins is the power instruction adjustment amount of the new energy station, ΔP max is the maximum limit of active power adjustment of all units.

16. The computer-readable storage medium of claim 13, wherein, The step of adjusting the power of each unit to the average power specifically comprises: obtaining the average power of each unit according to the total power of the new energy station and the number of units; and adjusting the power of each unit to the average power.

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