Active support coordination control method and system for new energy stations containing voltage controlled sources

Abstract

The present invention provides a method and system for active support and coordinated control of a new energy station containing a voltage controlled source. The method includes: obtaining an external characteristic working mode and a controlled target value of a new energy station according to scheduling and source-grid-load-storage operation and control instructions, setting internal parameters of a voltage controlled source and a current controlled source in the new energy station; monitoring the output state of a voltage source controlled unit and calculating a voltage source regulation margin; setting a multi-source coordinated control objective function and constraint conditions of power, inertia, and primary frequency regulation / voltage regulation of the new energy station based on the total target value of the external characteristic of the station, and obtaining a current source controlled distribution logic based on the multi-source coordinated control objective function and constraint conditions; setting a secondary control logic of each controlled unit and a distribution order strategy based on the voltage source regulation margin and the current source controlled distribution logic. The present invention can make the external characteristic of the new energy station characterized as a voltage source / current source type new energy station, and improve the active support capability of the new energy station.

Description

Technical Field

[0001] The present invention relates to the technical field of coordinated control of new energy stations, and in particular to an active support coordinated control method and system for a new energy station including a voltage controlled source. Background Art

[0002] New energy power stations include wind power, photovoltaic power, energy storage, SVG, etc., and are often composed of several manufacturers of different brands. As a result, the new energy stations have insufficient response time to changes in grid frequency and grid active power, which will lead to poor security and stability of the grid. This architecture highlights the following deficiencies:

[0003] 1. Each energy source's power control device can only independently adjust its own energy power, and does not consider the optimal power adjustment from the perspective of the entire site. If the active output of a single machine fluctuates due to weather or other reasons, this will inevitably cause the active power to be unable to effectively track the active AGC command value, resulting in a loss of power plant power generation, and more seriously, it will cause the power grid to assess the site;

[0004] 2. If the dead zone of the primary frequency regulation of the regional power grid is set too small, or the power grid frequency fluctuates too frequently, the unit will not be able to operate in the maximum power tracking state for a long time, and the equipment will be frequently operated for a long time, which will increase the wear of the equipment and reduce its reliability.

[0005] 3. When there is no power limit on the new energy station, when there is a low-frequency disturbance in the power grid, the new energy station cannot positively adjust the active power due to natural environmental factors. This means that in order to ensure that it can respond to the low-frequency disturbance of the power grid frequency, each new energy station needs to reduce its output, resulting in economic damage to the station;

[0006] 4. The existing new energy field equipment may not be able to perfectly reflect the frequency regulation effect even if it is transformed, because the original design and technology do not have the ability to quickly adjust the power output, so secondary transformation may occur;

[0007] 5. Active support capabilities of traditional new energy stations, such as AGC / AVC, primary frequency regulation, inertia support, and energy management platform, are completed independently by various devices, and the devices become data islands. Coordination between devices can only be carried out through communication, which affects the speed of frequency and voltage regulation and reduces the reliability of the system;

[0008] 6. Existing new energy stations often only contain current-controlled sources, and lack coordinated control methods and systems for new energy stations with voltage-controlled sources. With the advancement of my country's dual-carbon and new power system construction, systems powered by 100% new energy will continue to emerge, and the system often presents a low short-circuit ratio. Traditional new energy stations based on current-controlled sources will not be able to meet the system operation requirements. The external characteristics of its current source cannot independently establish voltage and frequency, and cannot meet the system requirements. Therefore, new energy stations with voltage-controlled sources can effectively provide voltage and frequency references to maintain the stability of the grid connection point and the entire power system, especially for systems that are 100% powered by new energy and have no large power grid support. Therefore, new energy stations with voltage sources can provide active support capabilities for the system and have broad prospects. However, the current station coordination control system mainly adopts the method of determining active and reactive power, which is only suitable for new energy stations containing only current sources. For new energy stations that contain both voltage sources and current sources, the voltage source cannot control the external active and reactive power. The traditional method of using active and reactive power distribution has major problems and cannot support the system's autonomous primary frequency regulation, voltage regulation, and inertia support. Summary of the invention

[0009] The purpose of the present invention is to propose an active support coordination control method and system for a new energy station containing a voltage controlled source, which can make the external characteristics of the new energy station be characterized as a voltage source / current source type new energy station, thereby improving the active support capability of the new energy station.

[0010] A method for active support coordination control of a new energy station including a voltage controlled source, characterized by comprising the following steps:

[0011] According to the dispatching and source-grid-load-storage operation and control instructions, the external characteristic working mode and the controlled target value of the new energy station are obtained, and the internal parameters of the voltage controlled source and the current controlled source in the new energy station are set according to the external characteristic working mode of the new energy station;

[0012] Monitor the output status of the voltage source controlled unit and calculate the voltage source regulation margin;

[0013] Based on the total target value of the external characteristics of the station, the multi-source coordinated control objective function and constraints of the power, inertia, and primary frequency / voltage regulation of the new energy station are set, and the current source controlled distribution logic is obtained according to the multi-source coordinated control objective function and constraints;

[0014] Based on the voltage source regulation margin and the current source controlled distribution logic, the secondary control logic of each controlled unit and its distribution priority strategy are set.

[0015] Furthermore, the internal parameters of the voltage controlled source and the current controlled source in the new energy station are set according to the external characteristic working mode of the new energy station, and the specific steps are as follows:

[0016] 1) The new energy station works in voltage source mode, and the external characteristics are voltage V / frequency f control mode. The current controlled source disables the phase-locked loop and uses the voltage source to generate the phase angle. The voltage controlled source sets the inertia and primary frequency regulation parameters. The voltage dead zone is ±0.02pu and the frequency regulation dead zone is ±0.05Hz.

[0017] 2) The new energy station works in the current source mode, and its external characteristics are fixed active and reactive power control. The primary frequency modulation function of the voltage controlled source is disabled, the active power is set to constant, the reactive power is set to constant voltage mode, the current source phase-locked loop function is turned on, and the phase angle generated by the large power grid is adopted.

[0018] Furthermore, the output state of the voltage source controlled unit specifically includes:

[0019] Active power, reactive power, voltage and power factor of the grid connection point;

[0020] Real-time active power, real-time reactive power, theoretically available power and status information of the wind turbine;

[0021] Real-time active power, real-time reactive power, theoretically available power and status information of the photovoltaic system;

[0022] The real-time active power of the energy storage system, the current capacity and status of the energy storage; and

[0023] Real-time reactive power, SVG port voltage and status information of dynamic reactive power compensation device SVG.

[0024] Furthermore, calculating the voltage source regulation margin specifically includes:

[0025] The active power regulation rate is calculated as formula (1), the reactive power regulation rate is calculated as formula (2), and the virtual inertia response time constant is calculated as formula (3):

[0026]

[0027]

[0028]

[0029] Where:

[0030] δ% is the active power adjustment rate, Δf is the difference between the current frequency and the rated frequency; P e is the target value of the output active power at the current frequency Δf; P0 is the initial value of the output active power; P N is the rated power of the power station; f d is the primary frequency modulation response dead zone Hz.

[0031] V% is the reactive power adjustment rate; U0 is the initial value of output voltage, U eis the current voltage value, ΔU is the difference between the current voltage and the rated voltage, U N is the nominal voltage, Q N is the rated reactive power;

[0032] T J is the virtual inertia response time constant of the new energy generator set; f, f N are the grid connection point frequency and rated frequency of the new energy generator set; ΔP, P N They are respectively the active power change and rated power of the new energy generator set.

[0033] Furthermore, the current source controlled distribution logic acquisition module is specifically used to set the multi-source coordinated control objective function and constraint conditions as shown below:

[0034]

[0035]

[0036] Wherein, formula (4) is the objective function of multi-source coordinated control, and formula (5) is the constraint condition;

[0037] min and max are the maximum and minimum values, P g and Q g The output of each current source active and reactive unit; f 1i and f 2i is the economic coefficient of cost and active and reactive power, i=1,2,3.....N; P gi and Q gi The output of each current source active and reactive unit; P di and Q di are the node active and reactive loads respectively; P i (θ,V) and Q i (θ, V) are the active and reactive unit outputs of the voltage source, θ and V are their power angle and phase, respectively; V gi is the voltage at the output port of the controlled source; P e and Q e The control target value calculated for the upper source grid load storage; δ i % is the primary frequency modulation coefficient, V i % is the primary voltage regulation coefficient, T i,j is the inertia coefficient.

[0038] Furthermore, the secondary control logic of each controlled unit and its allocation sequence strategy are set, including:

[0039] In the initial stage of primary frequency regulation and virtual inertia response, the energy storage system is used to bear the main primary frequency regulation and virtual inertia regulation, and gradually transitions to wind turbines and photovoltaics to bear the main active power regulation. The energy storage system supplements the output fluctuations caused by unstable wind and light power and overshoot of wind turbines and inverters.

[0040] In the initial stage of primary voltage regulation and reactive power rapid response, the SVG system takes on the main reactive power and primary voltage regulation, and gradually transitions to wind turbines and photovoltaics taking on the main reactive power and primary voltage regulation. The SVG system mainly supplements the reactive power fluctuations caused by unstable wind and light power and overshoot of wind turbines and inverters, thereby stably regulating the target power.

[0041] Furthermore, an active support coordination control system for a new energy station including a voltage controlled source is characterized by comprising:

[0042] The parameter setting module is used to obtain the external characteristic working mode and controlled target value of the new energy station according to the dispatch and source-grid-load-storage operation and control instructions, and set the internal parameters of the voltage-controlled source and current-controlled source in the new energy station;

[0043] A voltage source regulation margin calculation module is used to monitor the output state of the voltage source controlled unit and calculate the voltage source regulation margin;

[0044] The current source controlled distribution logic acquisition module is used to set the multi-source coordinated control objective function and constraint conditions of the power, inertia, and primary frequency / voltage regulation of the new energy station based on the total target value of the external characteristics of the station, and obtain the current source controlled distribution logic according to the multi-source coordinated control objective function and constraint conditions;

[0045] The allocation setting module is used to set the secondary control logic of each controlled unit and its allocation priority strategy based on the voltage source regulation margin and the current source controlled allocation logic.

[0046] Furthermore, the multi-source coordinated control objective function and constraints are as follows:

[0047]

[0048]

[0049] Wherein, formula (4) is the objective function of multi-source coordinated control, and formula (5) is the constraint condition;

[0050] min and max are the maximum and minimum values, P g and Q g The output of each current source active and reactive unit; f 1i and f 2i is the economic coefficient of cost and active and reactive power, i=1,2,3.....N; Pgi and Q gi The output of each current source active and reactive unit; P di and Q di are the node active and reactive loads respectively; P i (θ,V) and Q i (θ, V) are the active and reactive unit outputs of the voltage source, θ and V are their power angle and phase, respectively; V gi is the voltage at the output port of the controlled source; P e and Q e The control target value calculated for the upper source grid load storage; δ i % is the primary frequency modulation coefficient, V i % is the primary voltage regulation coefficient, T i,j is the inertia coefficient.

[0051] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the active support and coordination control method for a new energy station containing a voltage-controlled source as described above is implemented.

[0052] A non-transitory computer-readable storage medium stores a computer program, which, when executed by a processor, implements the active support and coordination control method for a new energy station containing a voltage-controlled source as described above.

[0053] The present invention coordinates the controlled units such as voltage source type new energy units, current source type new energy units, energy storage units, dynamic reactive power compensation SVG contained in the new energy station, so that the external characteristics of the new energy station can be characterized as a voltage source / current source type new energy station, thereby realizing the primary frequency regulation (with power increase capability), primary voltage regulation, inertia support, reactive power reverse absorption, low short-circuit ratio voltage support and other functions of the whole station, and can enhance the active support capability of the new energy station. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is the measurement and control logic diagram of the station system of the present invention;

[0055] Figure 2 It is a control logic block diagram of the station system of the present invention;

[0056] Figure 3 This is a field test diagram of the active control capability of the present invention;

[0057] Figure 4 This is a field test diagram of the reactive power control capability of the present invention;

[0058] Figure 5 This is a field test diagram of the primary frequency modulation control capability of the present invention;

[0059] Figure 6This is a field test diagram of the inertia adjustment control capability of the present invention;

[0060] Figure 7 This is the process intention of the active support and coordinated control method of the new energy station containing a voltage-controlled source in the present invention. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] See also Figure 7 The embodiment of the present invention provides a method for active support and coordinated control of a new energy station including a voltage-controlled source, comprising the following steps:

[0063] Step 1: According to the dispatching and source-grid-load-storage operation and control instructions, obtain the external characteristic working mode and controlled target value of the new energy station, and set the internal parameters of the voltage-controlled source and current-controlled source in the new energy station. The operation and control instructions include primary frequency regulation, primary voltage regulation (issued by the source-grid-load-storage system or dispatching) and active AGC / reactive AVC control instructions. The active AGC / reactive AVC control instructions are obtained from the dispatching master station by the station cooperative control device through telecontrol.

[0064] Among them, the internal parameters of the voltage controlled source and the current controlled source in the new energy station are set. The specific steps are as follows

[0065] 1) If the new energy station works in voltage source mode, the external characteristics are voltage V / frequency f control mode, the current source disables the phase-locked loop and uses the voltage source to generate the phase angle, the voltage source sets the inertia and primary frequency regulation parameters, the voltage dead zone is ±0.02pu, and the frequency regulation dead zone is ±0.05Hz;

[0066] 2) If the new energy station works in the current source mode, the external characteristics are fixed active and reactive power control, the primary frequency regulation function of the voltage controlled source is disabled, the active power is set to constant, the reactive power is set to constant voltage mode, the current source phase-locked loop function is turned on, and the phase angle generated by the large power grid is adopted.

[0067] Among them, the output voltage value of the voltage source and current source inverter can be set as needed. When the inverter port voltage deviates from the set voltage value, the inverter automatically adjusts the reactive output according to the droop curve to support the support voltage.

[0068] The voltage source inverter can set the rated frequency. When the port frequency of the voltage source inverter deviates from the set rated frequency, the voltage source inverter automatically adjusts the inverter output active power according to the droop curve to support the grid frequency.

[0069] When using a current source, the active power can directly set the active power limit value. When the limit value does not exceed the maximum output power of the inverter, the error between the actual output active power of the inverter and the power limit value is no more than ±1% of the national standard.

[0070] Step 2: Monitor the output status of the voltage source controlled unit and calculate the voltage source regulation margin.

[0071] The station cooperative control device includes a new energy active support module and an intelligent energy management module, wherein the new energy active support module collects voltage, current and frequency signals of the grid connection point and calculates active power, reactive power, voltage and power factor.

[0072] The station cooperative control device communicates with the wind turbine management platform using Modbus TCP or IEC104 as the communication protocol. The data uploaded by the wind turbine management platform include: real-time active power, real-time reactive power, theoretically transmittable power and status information, etc.; the data received by the wind turbine management platform include: active target value, reactive target value, start command, and stop command.

[0073] The communication protocol between the station cooperative control device and the photovoltaic system adopts Modbus TCP. The data uploaded by each inverter includes: real-time active power, real-time reactive power, theoretical transmittable power and status information, etc.; the data received by the inverter includes: active target value, reactive target value, start command and shutdown command.

[0074] The communication protocol between the station cooperative control device and the energy storage system adopts Modbus TCP. The data uploaded by the energy storage system includes: real-time active power, current energy storage capacity and status information, etc.; the data received by the energy storage system includes: active target value, start command, and shutdown command.

[0075] The communication protocol between the station cooperative control device and the dynamic reactive power compensation device SVG adopts Modbus TCP / RTU. The data uploaded by SVG include: real-time reactive power, SVG port voltage and status information, etc.; the data received by SVG include: reactive power target value.

[0076] The communication protocol between the station cooperative control device and AGC and AVC adopts IEC104, and the reference point table is as follows:

[0077] Table 1 AGC point table

[0078]

[0079]

[0080] Table 2 AGC point table

[0081]

[0082]

[0083] The voltage source regulation margin is calculated, including:

[0084] The relevant information of the booster station is obtained from the substation integrated automation system, where the active power regulation rate is calculated as shown in formula (1), the reactive power regulation rate is calculated as shown in formula (2), and the virtual inertia response time constant is calculated as shown in formula (3):

[0085]

[0086]

[0087]

[0088] Where:

[0089] δ%: Active power adjustment rate, Δf: The difference between the current frequency and the rated frequency; P e : The target value of the output active power at the current frequency Δf; P0: The initial value of the output active power; P N : rated power of power station; f d : Primary frequency modulation response dead zone Hz.

[0090] V%: reactive power regulation rate;

[0091] T J is the virtual inertia response time constant of the new energy generator set; f, f N They are the grid connection point frequency and rated frequency (50Hz) of the new energy generator set; ΔP, P N They are respectively the active power change and rated power of the new energy generator set (unit: kW).

[0092] Step 3: Based on the total target value of the external characteristics of the station, set the multi-source coordinated control objective function and constraints of the new energy station power, inertia, and primary frequency / voltage regulation, and obtain the current source controlled distribution logic according to the multi-source coordinated control objective function and constraints.

[0093] The multi-source coordinated control objective function and constraints are as follows:

[0094]

[0095]

[0096] Wherein, formula (4) is the objective function of multi-source coordinated control, and formula (5) is the constraint condition;

[0097] min and max are the maximum and minimum values, P g and Q g The output of each current source active and reactive unit; f 1i and f 2i is the economic coefficient of cost and active and reactive power, i=1,2,3.....N; P gi and Q gi The output of each current source active and reactive unit; P i (θ,V) and Q i (θ, V) are the active and reactive unit outputs of the voltage source, θ and V are their power angle and phase, respectively; V gi is the voltage at the output port of the controlled source; P e and Q e The control target value calculated for the upper source grid load storage; δ i % is the primary frequency modulation coefficient, V i % is the primary voltage regulation coefficient, T i,j is the inertia coefficient.

[0098] Step 4: Based on the voltage source regulation margin obtained in step 2 and the current source controlled allocation logic calculated in step 3, set the secondary control logic of each controlled unit and its allocation priority strategy.

[0099] The secondary control logic of the controlled unit and its allocation sequence strategy are as follows: Figure 2 As shown:

[0100] For primary frequency regulation and virtual inertia, due to the relatively fast response time requirements, the power regulation using wind turbines and photovoltaic voltage sources cannot meet the regulation rate requirements. Therefore, in the initial stage of primary frequency regulation and virtual inertia response, the energy storage system takes on the main primary frequency regulation and virtual inertia regulation by taking advantage of the fast charging and discharging rate of energy storage. As the wind turbine and photovoltaic power respond, the charging and discharging size of the energy storage system is dynamically adjusted, and the transition is gradually made to the wind turbine and photovoltaic taking on the main active power regulation. The energy storage unit mainly supplements the output fluctuations caused by the instability of wind and light power and the overshoot of wind turbines and inverters, thereby stabilizing the target power.

[0101] For primary voltage regulation and reactive power fast response control, the response time requirement is relatively fast, and the power regulation by wind turbine and photovoltaic voltage source cannot meet the regulation rate requirement. Therefore, in the initial stage of primary voltage regulation and reactive power fast response, the SVG system takes the main regulation amount by taking advantage of the fast reactive power charging and discharging rate of SVG. As the wind turbine and photovoltaic power respond, the charging and discharging size of the SVG system is dynamically adjusted, and the wind turbine and photovoltaic gradually take the main reactive power and primary voltage regulation amount. The SVG unit mainly supplements the reactive power output fluctuation caused by the unstable wind and light power and the overshoot of the wind turbine and inverter, so as to stabilize the target power. Figure 3-Figure 6 This is a diagram of the on-site measured effect of the regulation of the present invention.

[0102] The present invention also provides a new energy station active support coordination control system including a voltage controlled source, comprising:

[0103] The parameter setting module is used to obtain the external characteristic working mode and controlled target value of the new energy station according to the dispatch and source-grid-load-storage operation and control instructions, and set the internal parameters of the voltage-controlled source and current-controlled source in the new energy station;

[0104] A voltage source regulation margin calculation module is used to monitor the output state of the voltage source controlled unit and calculate the voltage source regulation margin;

[0105] The current source controlled distribution logic acquisition module is used to set the multi-source coordinated control objective function and constraint conditions of the power, inertia, and primary frequency / voltage regulation of the new energy station based on the total target value of the external characteristics of the station, and obtain the current source controlled distribution logic according to the multi-source coordinated control objective function and constraint conditions;

[0106] The allocation setting module is used to set the secondary control logic of each controlled unit and its allocation priority strategy based on the voltage source regulation margin and the current source controlled allocation logic.

[0107] The present invention coordinates the controlled units such as voltage source type new energy units, current source type new energy units, energy storage units, dynamic reactive power compensation SVG contained in the new energy station, so that the external characteristics of the new energy station can be characterized as a voltage source / current source type new energy station, thereby realizing the primary frequency regulation (with power increase capability), primary voltage regulation, inertia support, reactive power reverse absorption, low short-circuit ratio voltage support and other functions of the whole station, thereby improving the active support capability of the new energy station.

[0108] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0109] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0110] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0111] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0112] An embodiment of the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned active support and coordinated control method for a new energy station containing a voltage-controlled source is implemented.

[0113] An embodiment of the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for actively supporting and coordinating control of a new energy station containing a voltage-controlled source is implemented.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for active support and coordinated control of a new energy station containing a voltage controlled source, characterized in that The steps include: According to the dispatching and source-grid-load-storage operation and control instructions, the external characteristic working mode and the controlled target value of the new energy station are obtained, and the internal parameters of the voltage controlled source and the current controlled source in the new energy station are set according to the external characteristic working mode of the new energy station; Monitor the output status of the voltage source controlled unit and calculate the voltage source regulation margin; Based on the total target value of the external characteristics of the station, the multi-source coordinated control objective function and constraints of the power, inertia, and primary frequency / voltage regulation of the new energy station are set, and the current source controlled distribution logic is obtained according to the multi-source coordinated control objective function and constraints; Based on the voltage source regulation margin and the current source controlled allocation logic, setting the secondary control logic of each controlled unit and its allocation priority strategy; The multi-source coordinated control objective function and constraints are as follows: Wherein, formula (4) is the objective function of multi-source coordinated control, and formula (5) is the constraint condition; min and max are the maximum and minimum values, P g and Q g The output of each current source active and reactive unit; f 1i and f 2i is the economic coefficient of cost and active and reactive power, i = 1, 2, 3 ... N; P gi and Q gi The output of each current source active and reactive unit; P di and Q di are the node active and reactive loads respectively; P i (θ,V) and Q i (θ, V) are the active and reactive unit outputs of the voltage source, θ and V are their power angle and phase, respectively; V gi is the voltage at the output port of the controlled source; P e and Q e The control target value calculated for the upper source grid load storage; δ i % is the primary frequency modulation coefficient, V i % is the primary voltage regulation coefficient, T i,J is the inertia coefficient; Calculating the voltage source regulation margin specifically includes: The active power regulation rate is calculated as formula (1), the reactive power regulation rate is calculated as formula (2), and the virtual inertia response time constant is calculated as formula (3): Where: δ% is the active power adjustment rate, Δf is the difference between the current frequency and the rated frequency; P e is the target value of the output active power at the current frequency Δf; P0 is the initial value of the output active power; P N is the rated power of the power station; f d is the primary frequency modulation response dead zone Hz; V% is the reactive power adjustment rate; U0 is the initial value of output voltage, U e is the current voltage value, ΔU is the difference between the current voltage and the rated voltage, U N is the nominal voltage, Q N is the rated reactive power; T J is the virtual inertia response time constant of the new energy generator set; f, f N are the grid connection point frequency and rated frequency of the new energy generator set; ΔP, P N They are respectively the active power change and rated power of the new energy generator set.

2. The active support and coordination control method for a new energy station containing a voltage-controlled source according to claim 1, characterized in that: The internal parameters of the voltage controlled source and the current controlled source in the new energy station are set according to the external characteristic working mode of the new energy station. The specific steps are as follows: 1) The new energy station works in voltage source mode, and the external characteristics are voltage V / frequency f control mode. The current controlled source disables the phase-locked loop and uses the voltage source to generate the phase angle. The voltage controlled source sets the inertia and primary frequency regulation parameters. The voltage dead zone is ±0.02pu and the frequency regulation dead zone is ±0.05Hz. 2) The new energy station works in the current source mode, and its external characteristics are fixed active and reactive power control. The primary frequency modulation function of the voltage controlled source is disabled, the active power is set to constant, the reactive power is set to constant voltage mode, the current source phase-locked loop function is turned on, and the phase angle generated by the large power grid is adopted.

3. The active support and coordination control method for a new energy station containing a voltage controlled source according to claim 1, characterized in that: The output state of the voltage source controlled unit specifically includes: active power, reactive power, voltage and power factor of the grid connection point; Real-time active power, real-time reactive power, theoretically available power and status information of the wind turbine; Real-time active power, real-time reactive power, theoretically available power and status information of the photovoltaic system; The real-time active power of the energy storage system, the current capacity and status of the energy storage system; and Real-time reactive power, SVG port voltage and status information of dynamic reactive power compensation device SVG.

4. The active support and coordination control method for a new energy station containing a voltage controlled source according to claim 1, characterized in that: Set the secondary control logic of each controlled unit and its allocation priority strategy, including: In the initial stage of primary frequency regulation and virtual inertia response, the energy storage system is used to bear the main primary frequency regulation and virtual inertia regulation, and gradually transitions to wind turbines and photovoltaics to bear the main active power regulation. The energy storage system supplements the output fluctuations caused by unstable wind and light power and overshoot of wind turbines and inverters. In the initial stage of primary voltage regulation and reactive power rapid response, the SVG system takes on the main reactive power and primary voltage regulation, and gradually transitions to wind turbines and photovoltaics taking on the main reactive power and primary voltage regulation. The SVG system mainly supplements the reactive power fluctuations caused by unstable wind and light power and overshoot of wind turbines and inverters, thereby stably regulating the target power.

5. An active support and coordination control system for a new energy station containing a voltage controlled source, characterized in that: include: The parameter setting module is used to obtain the external characteristic working mode and controlled target value of the new energy station according to the dispatch and source-grid-load-storage operation and control instructions, and set the internal parameters of the voltage-controlled source and current-controlled source in the new energy station; A voltage source regulation margin calculation module is used to monitor the output state of the voltage source controlled unit and calculate the voltage source regulation margin; The current source controlled distribution logic acquisition module is used to set the multi-source coordinated control objective function and constraint conditions of the power, inertia, and primary frequency / voltage regulation of the new energy station based on the total target value of the external characteristics of the station, and obtain the current source controlled distribution logic according to the multi-source coordinated control objective function and constraint conditions; An allocation setting module is used to set the secondary control logic of each controlled unit and its allocation priority strategy based on the voltage source regulation margin and the current source controlled allocation logic; The current source controlled distribution logic acquisition module is specifically used to set the multi-source coordinated control objective function and constraint conditions as shown below: Wherein, formula (4) is the objective function of multi-source coordinated control, and formula (5) is the constraint condition; min and max are the maximum and minimum values, P g and Q g The output of each current source active and reactive unit; f 1i and f 2i is the economic coefficient of cost and active and reactive power, i = 1, 2, 3 ... N; P gi and Q gi The output of each current source active and reactive unit; P i (θ,V) and Q i (θ, V) are the active and reactive unit outputs of the voltage source, θ and V are their power angle and phase, respectively; V gi is the voltage at the output port of the controlled source; P e and Q e The control target value calculated for the upper source grid load storage; δ i % is the primary frequency modulation coefficient, V i % is the primary voltage regulation coefficient, T i,J is the inertia coefficient; Calculating the voltage source regulation margin specifically includes: The active power regulation rate is calculated as formula (1), the reactive power regulation rate is calculated as formula (2), and the virtual inertia response time constant is calculated as formula (3): Where: δ% is the active power adjustment rate, Δf is the difference between the current frequency and the rated frequency; P e is the target value of the output active power at the current frequency Δf; P0 is the initial value of the output active power; P N is the rated power of the power station; f d is the primary frequency modulation response dead zone Hz; V% is the reactive power adjustment rate; U0 is the initial value of output voltage, U e is the current voltage value, ΔU is the difference between the current voltage and the rated voltage, U N is the nominal voltage, Q N is the rated reactive power; T J is the virtual inertia response time constant of the new energy generator set; f, f N are the grid connection point frequency and rated frequency of the new energy generator set; ΔP, P N They are respectively the active power change and rated power of the new energy generator set.

6. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for active support and coordinated control of a new energy station containing a voltage-controlled source as described in any one of claims 1 to 4 is implemented.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the active support and coordinated control method for a new energy station containing a voltage-controlled source as described in any one of claims 1 to 4.

Images