Method and device for dynamic coordination control of avc and svg of new energy collection station

Abstract

The embodiment of the application provides a new energy collection station AVC and SVG dynamic coordination control method and device, which is applied to an SVG master control unit connected between an AVC system and SVG and a fixed capacitor in a new energy collection station, and the method comprises the following steps: judging the transient state of the current system according to the voltage upper and lower limit values issued by the AVC system; if it is judged that the current system is in a steady state, then the fixed capacitor and the SVG are distributed in reactive power according to the reactive power instruction issued by the AVC system and a preset coordination control rule; if it is judged that the current system is in a transient state, then the SVG is switched to local constant voltage control, and overload exception processing is performed according to the SVG control point voltage and current and a preset main ring auxiliary control rule; and the application can effectively improve the power limit of the new energy collection area.

Description

Technical Field

[0001] This application relates to the field of energy management, specifically to a method and device for dynamic coordinated control of AVC and SVG in a new energy collection station. Background Technology

[0002] Because renewable energy sources are highly volatile and reactive power and voltage are difficult to balance, and because renewable energy power generation equipment provides little or no reactive power, the voltage at the connection point is often too low, which greatly restricts the transmission capacity of renewable energy. Therefore, reactive power compensation equipment is widely used in renewable energy applications and plays an important role in reactive power and voltage balancing.

[0003] Generally, renewable energy collection stations are equipped with fixed-capacity reactive power compensation devices, such as capacitors and continuously adjustable static var generators (SVG). Fixed capacitors are low-cost, but their limited applicability due to their fixed capacity makes them unsuitable for transient situations. SVG, on the other hand, possesses strong computing power and millisecond-level control capabilities. It can dynamically compensate for rapidly changing instantaneous reactive power based on reactive power demand or voltage target values, achieving continuous reactive power regulation within the inductive to capacitive range of rated capacity. It can also rapidly generate reactive power to support grid voltage during large system disturbances.

[0004] However, in most renewable energy power plants, the reactive power compensation equipment is controlled by the substation AVC, which distributes reactive power to the SVG and fixed capacitors based on reactive power commands issued by the master station AVC. The capacitors are switched on and off according to the commands, and the SVG generates or absorbs reactive power accordingly. However, limited by the communication speed of the AVC system and the power flow calculation speed of the large power grid, the AVC master station typically issues commands to the AVC substations every 5 minutes, while the AVC substations typically issue commands to the SVG only on a second-by-second basis, severely limiting the SVG's millisecond-level control response capability. Furthermore, the SVG operates in a constant reactive power control mode, meaning it is only suitable for steady-state system operation and cannot respond to transient processes, making it difficult to fully utilize the SVG's dynamic reactive power response capability. When a large disturbance occurs in the system, the SVG continues to maintain the reactive power distribution control commands from the AVC, failing to respond promptly to voltage drops and generating more reactive power, and may even be in a reactive power absorption state, leading to a further drop in system voltage. Summary of the Invention

[0005] To address the problems in the prior art, this application provides a dynamic coordinated control method and device for AVC and SVG in a new energy collection station, which can effectively improve the power limit of the new energy collection area.

[0006] To solve at least one of the above problems, this application provides the following technical solution:

[0007] In a first aspect, this application provides a dynamic coordination control method for AVC and SVG in a new energy collection station, applied to the SVG master control unit in the new energy collection station that connects the AVC system, SVG, and fixed capacitors. The method includes:

[0008] Determine the current quasi-stable state of the system based on the upper and lower voltage limits issued by the AVC system;

[0009] If the current system is determined to be in a steady state, then reactive power is distributed to the fixed capacitor and SVG according to the reactive power command issued by the AVC system and the preset coordination control rules;

[0010] If the current system is determined to be in a transient state, the SVG is switched to local constant voltage control, and overload anomaly handling is performed according to the SVG control point voltage and current and the preset main loop auxiliary control rules.

[0011] Further, before determining the current system's metastable state based on the voltage upper and lower limits issued by the AVC system, the following steps are included:

[0012] The switching status of SVG and fixed capacitors and the reactive power output of SVG are sent to the AVC system so that the AVC system can generate and issue upper and lower voltage limits and reactive power command values ​​based on the switching status, reactive power output of SVG, local SVG and fixed capacitor parameter models, current system power flow, system voltage sensitivity and system reactive power demand.

[0013] Furthermore, determining the current system's metastable state based on the upper and lower voltage limits issued by the AVC system includes:

[0014] Determine whether the current voltage of the SVG constant voltage control point obtained from monitoring is within the range of the upper and lower voltage limits issued by the AVC system. If so, determine that the current system is in steady state; otherwise, determine that the current system is in transient state.

[0015] Furthermore, the reactive power allocation to the fixed capacitors and SVG according to the reactive power commands issued by the AVC system and the preset coordinated control rules includes:

[0016] The current nonfunctionality is determined based on the SVG and the voltage at the fixed capacitor connection point.

[0017] Based on the numerical comparison between the current reactive power capacity and the reactive power command, and according to the preset coordination control rules, reactive power allocation is performed on the fixed capacitor and SVG.

[0018] Further, the step of allocating reactive power to the fixed capacitor and SVG based on the numerical comparison between the current reactive power capacity and the reactive power command, and a preset coordination control rule, includes:

[0019] If the current reactive power value exceeds the set percentage of the reactive power command value, the transformer tap position is adjusted, and the SVG maintains a constant reactive power control state.

[0020] If the current reactive power value does not exceed the set percentage of the reactive power command value, then the number of fixed capacitor banks to be connected is determined according to the reactive power command value, and the difference between the total reactive power value of the fixed capacitor banks after determining the number of connected banks and the reactive power command value is determined as the reactive power target value of the SVG.

[0021] Furthermore, switching the SVG to local constant voltage control includes:

[0022] The SVG is controlled to absorb or generate reactive power according to a preset voltage target value.

[0023] Furthermore, the overload anomaly handling based on the SVG control point voltage and current and the preset main loop auxiliary control rules includes:

[0024] If the current at the SVG control point exceeds the preset rated current value, then a zero-current instruction is sent to the SVG based on the voltage change of the SVG control point voltage within a set time period.

[0025] Secondly, this application provides a dynamic coordination control device for AVC and SVG in a new energy collection station, applied to the SVG master control unit in the new energy collection station, which connects the AVC system, SVG, and fixed capacitors, and includes:

[0026] The system quasi-stable state determination module is used to determine the current quasi-stable state of the system based on the upper and lower voltage limits issued by the AVC system.

[0027] The steady-state reactive power distribution module is used to distribute reactive power to fixed capacitors and SVG according to the reactive power command issued by the AVC system and the preset coordination control rules if the current system is determined to be in a steady state.

[0028] The transient reactive power distribution module is used to switch the SVG to local constant voltage control if the current system is determined to be in a transient state, and to perform overload abnormality handling according to the voltage and current of the SVG control point and the preset main loop auxiliary control rules.

[0029] Furthermore, it also includes:

[0030] The AVC command determination unit is used to send the switching status of SVG and fixed capacitor and the reactive power output of SVG to the AVC system, so that the AVC system can generate and issue voltage upper and lower limits and reactive power command values ​​based on the switching status, reactive power output of SVG, local SVG and fixed capacitor parameter models, current system power flow, system voltage sensitivity and system reactive power demand.

[0031] Furthermore, the system transient stability determination module includes:

[0032] The control point voltage judgment unit is used to determine whether the current voltage of the SVG constant voltage control point obtained by monitoring is within the range of the upper and lower voltage limits issued by the AVC system. If so, the current system is determined to be in steady state; otherwise, the current system is determined to be in transient state.

[0033] Furthermore, the steady-state reactive power allocation module includes:

[0034] A non-functionality determination unit is used to determine the current non-functionality based on the SVG and the voltage at the fixed capacitor connection point.

[0035] The reactive power allocation unit is used to allocate reactive power to the fixed capacitor and SVG according to the numerical comparison relationship between the current reactive power capacity and the reactive power command and the preset coordination control rules.

[0036] Furthermore, the reactive power distribution unit includes:

[0037] The SVG constant reactive power control subunit is used to adjust the transformer tap position and maintain the constant reactive power control state if the current reactive power value exceeds a set percentage of the reactive power command value.

[0038] The fixed capacitor priority allocation subunit is used to determine the number of fixed capacitor banks to be put into operation based on the value of the reactive power command if the current reactive power value does not exceed a set percentage of the reactive power command value, and to determine the reactive power target value of the SVG as the difference between the total reactive power value of the fixed capacitor banks after determining the number of banks to be put into operation and the value of the reactive power command.

[0039] Furthermore, the transient reactive power allocation module includes:

[0040] The SVG local constant voltage control unit is used to control the SVG to absorb or generate reactive power according to a preset voltage target value.

[0041] Furthermore, the transient reactive power allocation module includes:

[0042] The main loop auxiliary control unit is used to send an inner loop current zeroing command to the SVG based on the voltage change value of the SVG control point voltage within a set time period if the current at the SVG control point exceeds the preset rated current value.

[0043] Thirdly, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the dynamic coordinated control method for the new energy collection station AVC and SVG.

[0044] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the dynamic coordination control method for the new energy collection station AVC and SVG.

[0045] Fifthly, this application provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the dynamic coordination control method for the new energy collection station AVC and SVG.

[0046] As can be seen from the above technical solution, this application provides a dynamic coordination control method and device for AVC and SVG in a new energy collection station. By receiving the voltage upper and lower limits and reactive power commands of the AVC from the SVG master control unit, the fixed capacitor and SVG can be flexibly controlled. This not only enables the fixed capacitor and SVG to coordinate and improve efficiency in steady state, but also fully utilizes the role of SVG in transient processes, thereby effectively improving the power limit of the new energy collection area. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is one of the flowcharts illustrating the dynamic coordination control method between AVC and SVG at the new energy collection station in this application embodiment;

[0049] Figure 2 This is the second flowchart illustrating the dynamic coordination control method between AVC and SVG at the new energy collection station in this application embodiment;

[0050] Figure 3 This is the third flowchart illustrating the dynamic coordination control method between AVC and SVG at the new energy collection station in this application embodiment;

[0051] Figure 4 This is one of the structural diagrams of the dynamic coordination control device between the new energy collection station AVC and SVG in the embodiments of this application;

[0052] Figure 5 This is the second structural diagram of the dynamic coordination control device between the new energy collection station AVC and SVG in the embodiments of this application;

[0053] Figure 6 This is the third structural diagram of the dynamic coordination control device for the new energy collection station AVC and SVG in the embodiments of this application;

[0054] Figure 7 This is the fourth structural diagram of the dynamic coordination control device for the new energy collection station AVC and SVG in the embodiments of this application;

[0055] Figure 8 This is the fifth structural diagram of the dynamic coordination control device between the new energy collection station AVC and SVG in the embodiments of this application;

[0056] Figure 9 This is the sixth structural diagram of the dynamic coordination control device for the new energy collection station AVC and SVG in the embodiments of this application;

[0057] Figure 10 This is a schematic diagram of the coordinated control of AVC and SVG in the prior art;

[0058] Figure 11 This is a schematic diagram of AVC and SVG coordinated control in a specific embodiment of this application;

[0059] Figure 12 This is a schematic diagram of the structure of the electronic device in the embodiments of this application. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] Considering the communication speed of the AVC system and the power flow calculation speed of the large power grid, the AVC master station typically issues commands to the AVC slave station once every 5 minutes, while the AVC slave station typically issues commands to the SVG on a second-by-second basis, greatly limiting the SVG's millisecond-level control response capability. Simultaneously, the SVG operates in a constant reactive power control mode, meaning it is only suitable for steady-state system operation and cannot respond to transient processes, making it difficult to fully utilize the SVG's dynamic reactive power response capability. When a large disturbance occurs in the system, the SVG continues to maintain the reactive power distribution control commands from the AVC, failing to respond promptly to voltage drops and reactive power generation, and may even be in a reactive power absorption state, leading to further voltage drops. This application provides a dynamic coordinated control method and device for AVC and SVG in a renewable energy aggregation station. By flexibly controlling the fixed capacitors and SVG through the voltage upper and lower limits and reactive power commands received from the AVC by the SVG master control unit, it not only enables the fixed capacitors and SVG to coordinate and improve efficiency in steady state but also fully utilizes the role of the SVG in transient processes, thereby effectively improving the power limit of the renewable energy aggregation area.

[0062] See Figure 10 In existing technologies, the coordinated control strategy of AVC (Power Grid Voltage Reactive Power Control System) and SVG (Static Var Generator) generally involves the master station AVC calculating the voltage sensitivity and required reactive power capacity of each station based on power flow information uploaded by each substation AVC, the capacity of each substation's reactive power compensation equipment, and its current output. Then, the substation AVC allocates reactive power commands to the SVG and fixed capacitors according to the master station's reactive power commands. The reactive power allocation method at the substations typically prioritizes allocating fixed capacitors based on their capacity margins and reactive power capacity requirements, with the remaining capacity allocated to the SVG.

[0063] However, limited by the communication speed of the AVC system and the power flow calculation speed of the large power grid, the master station AVC typically issues commands to the slave station AVC once every 5 minutes, while the slave station AVC typically issues commands to the SVG on a second-by-second basis, greatly limiting the SVG's millisecond-level control response capability. Simultaneously, the SVG operates in a constant reactive power control mode, meaning it is only suitable for steady-state system operation and cannot respond to transient processes, making it difficult to fully utilize the SVG's dynamic reactive power response capability. When a large disturbance occurs in the system, the SVG continues to maintain the reactive power distribution control commands from the AVC, failing to respond promptly to voltage drops and reactive power generation, and may even be in a reactive power absorption state, leading to a further drop in system voltage.

[0064] To effectively enhance the power limit of a renewable energy aggregation area, this application provides an embodiment of a dynamic coordinated control method for AVC and SVG at a renewable energy aggregation station. See [link to embodiment]. Figure 1The dynamic coordination control method for AVC and SVG at the new energy collection station specifically includes the following:

[0065] Step S101: Determine the current metastable state of the system based on the upper and lower voltage limits issued by the AVC system.

[0066] Optionally, this application adds an SVG master control unit connected between the AVC system, the SVG, and the fixed capacitor in the new energy collection station, and the method execution subject of this application is also the SVG master control unit.

[0067] Optionally, the AVC system described in this application includes an AVC master station and its subordinate AVC substations.

[0068] Optionally, this application can pre-configure the communication information between the AVC master station, AVC substation, SVG master control unit, fixed capacitor, and SVG using existing technologies.

[0069] Optionally, the AVC substation forwards the voltage upper and lower limits and reactive power command values ​​issued by the AVC master station to the SVG master control unit of this application. At the same time, the SVG master control unit of this application also sends the switching status of the SVG and fixed capacitor and the reactive power output of the SVG to the AVC substation.

[0070] Optionally, the SVG master control unit of this application is connected to the fixed capacitor and the SVG, and can determine the transient steady state of the system based on the received voltage upper and lower limits and reactive power commands of the AVC substation. In the steady state, reactive power commands are issued to the fixed capacitor and the SVG respectively. In the transient state, the SVG switches to constant voltage control. At the same time, the fixed capacitor and the SVG can also send their switching status and output reactive power to the SVG master control unit.

[0071] Understandably, the upper and lower voltage limits are generally relatively stable values, obtained by traversing all possible operating conditions to determine the system's annual operating mode.

[0072] Step S102: If the current system is determined to be in a steady state, then the fixed capacitor and SVG are reactively distributed according to the reactive power command issued by the AVC system and the preset coordinated control rules.

[0073] Optionally, if the SVG master control unit determines that the current control point voltage is within the upper and lower voltage limits issued by the AVC system, the SVG master control unit will perform reactive power distribution to the fixed capacitor and SVG according to the reactive power command issued by the AVC.

[0074] Specifically, the SVG master control unit calculates the current reactive power capacity based on the voltage of the SVG and capacitor connection point. If the current reactive power capacity is less than the set percentage of the reactive power command issued by the AVC (e.g., 80%), it indicates that the remaining reactive power capacity of the SVG master control unit is insufficient to compensate for the voltage. At this time, the transformer tap position can be adjusted, and the SVG maintains a constant reactive power control state.

[0075] Specifically, if the current reactive power is greater than the set percentage (e.g., 80%) of the reactive power command issued by AVC, then reactive power is allocated according to the expression shown in equation (1):

[0076] [Q AVC Q C ] = N

[0077] Q AVC -N*Q C =Q SVG (1)

[0078] That is, the required reactive power is preferentially allocated to fixed capacitors. N sets of capacitors are connected according to the reactive power command issued by AVC, and Q is issued to SVG at the same time. SVG The reactive power target value.

[0079] Step S103: If it is determined that the current system is in a transient state, switch the SVG to local constant voltage control and perform overload abnormality handling according to the voltage and current of the SVG control point and the preset main loop auxiliary control rules.

[0080] Optionally, if the SVG master control unit determines that the current control point voltage exceeds the upper and lower voltage limits issued by the AVC system, the SVG will automatically switch to local constant voltage control.

[0081] It is understandable that the constant voltage control target value is a target value given by the dispatcher at the beginning of the project commissioning, and the SVG absorbs or generates reactive power according to the voltage target value.

[0082] Optionally, since voltage exceeding the limit is often caused by large system disturbances, which are frequently accompanied by phase jumps, the phase-locked loop in the SVG control becomes inaccurate, leading to DC-side overvoltage or overcurrent, causing the SVG to lock up or damage some submodules. Therefore, an auxiliary control is added to the SVG voltage main loop control.

[0083] Specifically, when the current value of the SVG reaches 90% of the rated value, the change in the control point voltage is determined according to equation (2):

[0084]

[0085] In the formula, Un represents the per-unit value of the nth sampling point of the SVG control point voltage, and d represents the sampling point within one cycle. Formula (2) reflects the change of the current voltage compared to the voltage half a cycle ago. When the nth, n-1th and n-2th sampling points simultaneously satisfy the change amount greater than 0.1, that is, satisfy the relationship shown in the following formula (3), the inner current loop is directly set to 0, and the process lasts for 10ms.

[0086]

[0087] As can be seen from the above description, the dynamic coordination control method of AVC and SVG in the new energy collection station provided in this application embodiment can flexibly control the fixed capacitor and SVG through the voltage upper and lower limits and reactive power commands of the AVC received by the SVG master control unit. It can not only coordinate the fixed capacitor and SVG to improve efficiency in steady state, but also give full play to the role of SVG in transient process, thereby effectively improving the power limit of the new energy collection area.

[0088] In order to enable the AVC system to accurately generate voltage upper and lower limits and reactive power command values, in one embodiment of the dynamic coordination control method between AVC and SVG in the new energy collection station of this application, the following content may be included before the above step S101:

[0089] The switching status of SVG and fixed capacitors and the reactive power output of SVG are sent to the AVC system so that the AVC system can generate and issue upper and lower voltage limits and reactive power command values ​​based on the switching status, reactive power output of SVG, local SVG and fixed capacitor parameter models, current system power flow, system voltage sensitivity and system reactive power demand.

[0090] Optionally, the AVC master station is connected to the AVC substation. The AVC substation sends the switching status of the SVG and fixed capacitor and the reactive power output of the SVG to the AVC master station. The AVC master station can pre-add parameter models of the SVG and fixed capacitor and issue voltage upper and lower limits and reactive power command values ​​to the AVC substation according to the current system power flow, voltage sensitivity and reactive power demand.

[0091] In order to accurately determine the current transient steady state of the system, in one embodiment of the dynamic coordinated control method for AVC and SVG of the new energy collection station in this application, the above step S101 may further include the following:

[0092] Determine whether the current voltage of the SVG constant voltage control point obtained from monitoring is within the range of the upper and lower voltage limits issued by the AVC system. If so, determine that the current system is in steady state; otherwise, determine that the current system is in transient state.

[0093] Optionally, the SVG master control unit of this application is connected to the fixed capacitor and the SVG, and can determine the transient steady state of the system based on the received voltage upper and lower limits and reactive power commands of the AVC substation. In the steady state, reactive power commands are issued to the fixed capacitor and the SVG respectively. In the transient state, the SVG switches to constant voltage control. At the same time, the fixed capacitor and the SVG can also send their switching status and output reactive power to the SVG master control unit.

[0094] Understandably, the upper and lower voltage limits are generally relatively stable values, obtained by traversing all possible operating conditions to determine the system's annual operating mode.

[0095] To ensure accurate steady-state reactive power distribution, in one embodiment of the dynamic coordinated control method for AVC and SVG at the new energy collection station in this application, see [link to relevant documentation]. Figure 2 The above step S102 may also specifically include the following:

[0096] Step S201: Determine the current non-functionality based on the SVG and the voltage at the fixed capacitor connection point.

[0097] Step S202: Based on the numerical comparison between the current reactive power capacity and the reactive power command, and the preset coordination control rules, reactive power allocation is performed on the fixed capacitor and SVG.

[0098] To accurately perform steady-state reactive power distribution, in one embodiment of the dynamic coordinated control method for AVC and SVG in the new energy collection station of this application, see [link to relevant documentation]. Figure 3 The above step S202 may also specifically include the following:

[0099] Step S301: If the current reactive power value exceeds the set percentage of the reactive power command value, then adjust the transformer tap position and the SVG maintains constant reactive power control state.

[0100] Step S302: If the current reactive power value does not exceed the set percentage of the reactive power command value, then determine the number of fixed capacitor banks to be connected according to the reactive power command value, and determine the difference between the total reactive power value of the fixed capacitor banks after determining the number of connected banks and the reactive power command value as the reactive power target value of the SVG.

[0101] Specifically, the SVG master control unit calculates the current reactive power capacity based on the voltage of the SVG and capacitor connection point. If the current reactive power capacity is less than the set percentage of the reactive power command issued by the AVC (e.g., 80%), it indicates that the remaining reactive power capacity of the SVG master control unit is insufficient to compensate for the voltage. At this time, the transformer tap position can be adjusted, and the SVG maintains a constant reactive power control state.

[0102] Specifically, if the current reactive power is greater than the set percentage (e.g., 80%) of the reactive power command issued by AVC, then reactive power is allocated according to the expression shown in equation (1):

[0103] [Q AVC Q C ] = N

[0104] Q AVC -N*Q C =Q SVG (1)

[0105] That is, the required reactive power is preferentially allocated to fixed capacitors. N sets of capacitors are connected according to the reactive power command issued by AVC, and Q is issued to SVG at the same time. SVG The reactive power target value.

[0106] In order to accurately perform transient reactive power distribution, in one embodiment of the dynamic coordination control method for AVC and SVG of the new energy collection station in this application, the above step S103 may further include the following:

[0107] The SVG is controlled to absorb or generate reactive power according to a preset voltage target value.

[0108] Optionally, if the SVG master control unit determines that the current control point voltage exceeds the upper and lower voltage limits issued by the AVC system, the SVG will automatically switch to local constant voltage control.

[0109] It is understandable that the constant voltage control target value is a target value given by the dispatcher at the beginning of the project commissioning, and the SVG absorbs or generates reactive power according to the voltage target value.

[0110] In order to accurately perform transient reactive power distribution, in one embodiment of the dynamic coordination control method for AVC and SVG of the new energy collection station in this application, the above step S103 may further include the following:

[0111] If the current at the SVG control point exceeds the preset rated current value, then a zero-current instruction is sent to the SVG based on the voltage change of the SVG control point voltage within a set time period.

[0112] Optionally, since voltage exceeding the limit is often caused by large system disturbances, which are frequently accompanied by phase jumps, the phase-locked loop in the SVG control becomes inaccurate, leading to DC-side overvoltage or overcurrent, causing the SVG to lock up or damage some submodules. Therefore, an auxiliary control is added to the SVG voltage main loop control.

[0113] Specifically, when the current value of the SVG reaches 90% of the rated value, the change in the control point voltage is determined according to equation (2):

[0114]

[0115] In the formula, Un represents the per-unit value of the nth sampling point of the SVG control point voltage, and d represents the sampling point within one cycle. Formula (2) reflects the change of the current voltage compared to the voltage half a cycle ago. When the nth, n-1th and n-2th sampling points simultaneously satisfy the change amount greater than 0.1, that is, satisfy the relationship shown in the following formula (3), the inner current loop is directly set to 0, and the process lasts for 10ms.

[0116]

[0117] To effectively enhance the power limit of renewable energy aggregation areas, this application provides an embodiment of a renewable energy aggregation station AVC and SVG dynamic coordination control device for implementing all or part of the aforementioned renewable energy aggregation station AVC and SVG dynamic coordination control method. See [link to embodiment]. Figure 4 The dynamic coordination control device for the new energy collection station AVC and SVG specifically includes the following components:

[0118] The system quasi-stable state judgment module 10 is used to determine the current quasi-stable state of the system based on the upper and lower voltage limits issued by the AVC system.

[0119] The steady-state reactive power distribution module 20 is used to distribute reactive power to the fixed capacitor and SVG according to the reactive power command issued by the AVC system and the preset coordination control rules if the current system is determined to be in a steady state.

[0120] The transient reactive power distribution module 30 is used to switch the SVG to local constant voltage control if it is determined that the current system is in a transient state, and to perform overload abnormality handling according to the voltage and current of the SVG control point and the preset main loop auxiliary control rules.

[0121] As can be seen from the above description, the dynamic coordination control device for AVC and SVG of the new energy collection station provided in this application embodiment can flexibly control the fixed capacitor and SVG through the voltage upper and lower limits and reactive power commands of the AVC received by the SVG master control unit. It can not only coordinate the fixed capacitor and SVG to improve efficiency in steady state, but also give full play to the role of SVG in transient process, thereby effectively improving the power limit of the new energy collection area.

[0122] In order to enable the AVC system to accurately generate voltage upper and lower limits and reactive power command values, one embodiment of the dynamic coordination control device for AVC and SVG in the new energy collection station of this application further includes the following:

[0123] The AVC command determination unit is used to send the switching status of SVG and fixed capacitor and the reactive power output of SVG to the AVC system, so that the AVC system can generate and issue voltage upper and lower limits and reactive power command values ​​based on the switching status, reactive power output of SVG, local SVG and fixed capacitor parameter models, current system power flow, system voltage sensitivity and system reactive power demand.

[0124] In order to accurately determine the current transient steady state of the system, in one embodiment of the dynamic coordination control device for the new energy collection station AVC and SVG of this application, see [link to relevant documentation]. Figure 5 The system transient stability determination module 10 includes:

[0125] The control point voltage judgment unit 11 is used to determine whether the current voltage of the SVG constant voltage control point obtained by monitoring is within the range of the upper and lower voltage limits issued by the AVC system. If it is, the current system is determined to be in steady state; otherwise, the current system is determined to be in transient state.

[0126] In order to accurately perform steady-state reactive power distribution, in one embodiment of the dynamic coordination control device for AVC and SVG in the new energy collection station of this application, see [link to relevant documentation]. Figure 6 The steady-state reactive power distribution module 20 includes:

[0127] The non-functionality determination unit 21 is used to determine the current non-functionality based on the SVG and the voltage at the fixed capacitor connection point.

[0128] The reactive power allocation unit 22 is used to allocate reactive power to the fixed capacitor and SVG according to the numerical comparison relationship between the current reactive power capacity and the reactive power command and the preset coordination control rules.

[0129] In order to accurately perform steady-state reactive power distribution, in one embodiment of the dynamic coordination control device for AVC and SVG in the new energy collection station of this application, see [link to relevant documentation]. Figure 7 The reactive power distribution unit 22 includes:

[0130] The SVG constant reactive power control subunit 221 is used to adjust the transformer tap position so that the SVG is in a constant reactive power control state if the value of the current reactive power exceeds a set percentage of the value of the reactive power command.

[0131] The fixed capacitor priority allocation subunit 222 is used to determine the number of fixed capacitor banks to be put into operation based on the value of the reactive power command if the current reactive power value does not exceed a set percentage of the value of the reactive power command, and to determine the difference between the total reactive power value of the fixed capacitor banks after determining the number of banks to be put into operation and the value of the reactive power command as the reactive power target value of the SVG.

[0132] In order to accurately perform transient reactive power distribution, in one embodiment of the dynamic coordination control device for AVC and SVG in the new energy collection station of this application, see [link to relevant documentation]. Figure 8 The transient reactive power allocation module 30 includes:

[0133] The SVG local constant voltage control unit 31 is used to control the SVG to absorb or generate reactive power according to a preset voltage target value.

[0134] In order to accurately perform transient reactive power distribution, in one embodiment of the dynamic coordination control device for AVC and SVG in the new energy collection station of this application, see [link to relevant documentation]. Figure 9 The transient reactive power allocation module 30 includes:

[0135] The main loop auxiliary control unit 32 is used to send an inner loop current zeroing command to the SVG based on the voltage change value of the SVG control point voltage within a set time period if the current at the SVG control point exceeds the preset rated current value.

[0136] To further illustrate this solution, this application also provides a specific application example of the dynamic coordination control method for AVC and SVG at a new energy collection station, implemented using the aforementioned dynamic coordination control device for AVC and SVG at the new energy collection station. See [link to relevant documentation]. Figure 11 Specifically, it includes the following:

[0137] (1) Set the SVG master control unit to monitor the voltage of the SVG control point, control the switching of the fixed capacitor and SVG, the switching of the SVG control strategy and the SVG control command; the SVG master control unit sends the rated capacity, switching status and reactive power output of the SVG and fixed capacitor to the AVC system, and at the same time sets the SVG master control unit to receive the reactive power command value and the upper and lower limit values ​​of the control point voltage issued by the AVC system.

[0138] (2) The SVG central control unit determines the transient stable state of the system at this time based on the upper and lower voltage limits issued by the AVC system.

[0139] (3) In steady state, when the SVG control unit determines that the current control point voltage meets the upper and lower voltage limits issued by the AVC system, the SVG control unit performs reactive power distribution to the fixed capacitor and SVG according to the reactive power command issued by the AVC. At this time, the SVG is in constant reactive power control state.

[0140] (3.1) When the AVC system determines that the remaining reactive power capacity of the SVG main control unit is insufficient to compensate for the voltage, the AVC control changes the transformer tap.

[0141] (3.2) When the AVC system determines that the remaining reactive power capacity of the SVG master control unit meets the compensation voltage, the SVG master control unit allocates reactive power to the fixed capacitor and SVG according to the reactive power command issued by the AVC substation.

[0142] (4) In the transient state, when the SVG master control unit determines that the current control point voltage exceeds the upper and lower voltage limits issued by the AVC system, the SVG master control unit does not operate the fixed capacitor, switches the SVG to local constant voltage control, and the control target is the voltage curve issued by the dispatcher.

[0143] As can be seen from the above, this application flexibly controls the fixed capacitor and SVG by receiving the voltage upper and lower limits and reactive power commands of the AVC through the SVG master control unit. This not only enables the fixed capacitor and SVG to work together in a coordinated manner to improve efficiency in steady state, but also fully utilizes the role of the SVG in transient processes, effectively enhancing the power limit of the new energy gathering area.

[0144] From a hardware perspective, in order to effectively improve the power limit of the renewable energy collection area, this application provides an embodiment of an electronic device for implementing all or part of the dynamic coordinated control method of AVC and SVG in the renewable energy collection station. The electronic device specifically includes the following components:

[0145] The system comprises a processor, memory, a communications interface, and a bus; wherein the processor, memory, and communications interface communicate with each other via the bus; the communications interface is used to realize information transmission between the dynamic coordination control device for AVC and SVG at the new energy aggregation station and core business systems, user terminals, and related databases and other related equipment; the logic controller can be a desktop computer, tablet computer, or mobile terminal, etc., and this embodiment is not limited to these. In this embodiment, the logic controller can be implemented with reference to the embodiments of the dynamic coordination control method for AVC and SVG at the new energy aggregation station and the embodiments of the dynamic coordination control device for AVC and SVG at the new energy aggregation station, the contents of which are incorporated herein, and repeated details will not be described again.

[0146] It is understood that the user terminal may include smartphones, tablet computers, network set-top boxes, portable computers, desktop computers, personal digital assistants (PDAs), in-vehicle devices, smart wearable devices, etc. Among these, the smart wearable devices may include smart glasses, smartwatches, smart bracelets, etc.

[0147] In practical applications, some aspects of the dynamic coordination control method between AVC and SVG at the new energy collection station can be executed on the electronic device side as described above, or all operations can be completed in the client device. The choice can be made based on the processing power of the client device and the limitations of the user's usage scenario. This application does not impose any limitations on this. If all operations are completed in the client device, the client device may further include a processor.

[0148] The aforementioned client device may have a communication module (i.e., a communication unit) that can communicate with a remote server to achieve data transmission. The server may include a server on the task scheduling center side; in other implementation scenarios, it may also include a server on an intermediate platform, such as a server on a third-party server platform that has a communication link with the task scheduling center server. The server may include a single computer device, a server cluster consisting of multiple servers, or a distributed server structure.

[0149] Figure 12 This is a schematic block diagram illustrating the system configuration of the electronic device 9600 according to an embodiment of this application. Figure 12 As shown, the electronic device 9600 may include a central processing unit 9100 and a memory 9140; the memory 9140 is coupled to the central processing unit 9100. It is worth noting that... Figure 12 This is an example; other types of structures can also be used to supplement or replace this structure to achieve telecommunications functions or other functions.

[0150] In one embodiment, the dynamic coordination control method function between the new energy collection station AVC and SVG can be integrated into the central processing unit 9100. The central processing unit 9100 can be configured to perform the following control:

[0151] Step S101: Determine the current metastable state of the system based on the upper and lower voltage limits issued by the AVC system.

[0152] Step S102: If the current system is determined to be in a steady state, then the fixed capacitor and SVG are reactively distributed according to the reactive power command issued by the AVC system and the preset coordinated control rules.

[0153] Step S103: If it is determined that the current system is in a transient state, switch the SVG to local constant voltage control and perform overload abnormality handling according to the voltage and current of the SVG control point and the preset main loop auxiliary control rules.

[0154] As can be seen from the above description, the electronic device provided in this application embodiment can flexibly control the fixed capacitor and SVG through the voltage upper and lower limits and reactive power commands of the AVC received by the SVG master control unit. This not only enables the fixed capacitor and SVG to work together in a coordinated manner to improve efficiency in steady state, but also fully utilizes the role of SVG in transient processes, thereby effectively improving the power limit of the new energy gathering area.

[0155] In another embodiment, the dynamic coordination control device for the new energy collection station AVC and SVG can be configured separately from the central processing unit 9100. For example, the dynamic coordination control device for the new energy collection station AVC and SVG can be configured as a chip connected to the central processing unit 9100, and the function of the dynamic coordination control method for the new energy collection station AVC and SVG can be realized through the control of the central processing unit.

[0156] like Figure 12 As shown, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is worth noting that the electronic device 9600 does not necessarily need to include these components. Figure 12 All components shown; in addition, the electronic device 9600 may also include Figure 12 For components not shown, please refer to existing technologies.

[0157] like Figure 12 As shown, the central processing unit 9100, sometimes also referred to as a controller or operating control, may include a microprocessor or other processor device and / or logic device, which receives inputs and controls the operation of various components of the electronic device 9600.

[0158] The memory 9140 may be, for example, one or more of a cache, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable devices. It may store the aforementioned failure-related information, and also store a program for executing that information. The central processing unit 9100 may execute the program stored in the memory 9140 to perform information storage or processing, etc.

[0159] Input unit 9120 provides input to central processing unit 9100. Input unit 9120 may be, for example, a keypad or touch input device. Power supply 9170 provides power to electronic device 9600. Display 9160 displays images and text. Display may be, for example, an LCD display, but is not limited thereto.

[0160] The memory 9140 can be a solid-state memory, such as a read-only memory (ROM), random access memory (RAM), a SIM card, etc. It can also be a memory that retains information even when power is off, can be selectively erased, and contains more data; examples of this type of memory are sometimes referred to as EPROMs. The memory 9140 can also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application / function storage unit 9142 for storing application programs and function programs or processes for executing the operation of the electronic device 9600 via the central processing unit 9100.

[0161] The memory 9140 may also include a data storage unit 9143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 9144 of the memory 9140 may include various drivers for the electronic device's communication functions and / or for performing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0162] The communication module 9110 is a transmitter / receiver 9110 that transmits and receives signals via the antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processing unit 9100 to provide input signals and receive output signals, which can be the same as in a conventional mobile communication terminal.

[0163] Based on different communication technologies, multiple communication modules 9110 can be configured in the same electronic device, such as cellular network modules, Bluetooth modules, and / or wireless LAN modules. The communication module (transmitter / receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and receive audio input from the microphone 9132, thereby realizing typical telecommunications functions. The audio processor 9130 may include any suitable buffer, decoder, amplifier, etc. Additionally, the audio processor 9130 is coupled to a central processing unit 9100, enabling on-device recording via the microphone 9132 and on-device playback of stored sound via the speaker 9131.

[0164] Embodiments of this application also provide a computer-readable storage medium capable of implementing all steps of the dynamic coordination control method for AVC and SVG of a new energy collection station, where the execution subject is a server or client, as described in the above embodiments. The computer-readable storage medium stores a computer program that, when executed by a processor, implements all steps of the dynamic coordination control method for AVC and SVG of a new energy collection station, where the execution subject is a server or client, as described in the above embodiments. For example, when the processor executes the computer program, it implements the following steps:

[0165] Step S101: Determine the current metastable state of the system based on the upper and lower voltage limits issued by the AVC system.

[0166] Step S102: If the current system is determined to be in a steady state, then the fixed capacitor and SVG are reactively distributed according to the reactive power command issued by the AVC system and the preset coordinated control rules.

[0167] Step S103: If it is determined that the current system is in a transient state, switch the SVG to local constant voltage control and perform overload abnormality handling according to the voltage and current of the SVG control point and the preset main loop auxiliary control rules.

[0168] As can be seen from the above description, the computer-readable storage medium provided in this application embodiment can flexibly control the fixed capacitor and SVG through the voltage upper and lower limits and reactive power commands of the AVC received by the SVG master control unit. This not only enables the fixed capacitor and SVG to coordinate and improve efficiency in steady state, but also fully utilizes the role of SVG in transient processes, thereby effectively improving the power limit of the new energy gathering area.

[0169] Embodiments of this application also provide a computer program product capable of implementing all steps in the dynamic coordination control method for AVC and SVG of a new energy collection station, where the execution subject is a server or client, as described in the above embodiments. When executed by a processor, this computer program / instruction implements the steps of the dynamic coordination control method for AVC and SVG of a new energy collection station. For example, the computer program / instruction implements the following steps:

[0170] Step S101: Determine the current metastable state of the system based on the upper and lower voltage limits issued by the AVC system.

[0171] Step S102: If the current system is determined to be in a steady state, then the fixed capacitor and SVG are reactively distributed according to the reactive power command issued by the AVC system and the preset coordinated control rules.

[0172] Step S103: If it is determined that the current system is in a transient state, switch the SVG to local constant voltage control and perform overload abnormality handling according to the voltage and current of the SVG control point and the preset main loop auxiliary control rules.

[0173] As can be seen from the above description, the computer program product provided in this application embodiment can flexibly control the fixed capacitor and SVG through the voltage upper and lower limits and reactive power commands of the AVC received by the SVG master control unit. Not only can the fixed capacitor and SVG coordinate and improve efficiency in steady state, but it can also give full play to the role of SVG in transient process, thereby effectively improving the power limit of the new energy gathering area.

[0174] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0175] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0176] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0177] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0178] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A dynamic coordinated control method for AVC and SVG in a new energy collection station, characterized in that, An SVG central control unit is applied in a new energy aggregation station, connecting the AVC system, SVG, and fixed capacitors. The AVC system includes an AVC master station and its subordinate AVC substations. The AVC substations forward the voltage upper and lower limits and reactive power command values ​​issued by the AVC master station to the SVG central control unit. The method includes: Determine the current quasi-stable state of the system based on the upper and lower voltage limits issued by the AVC system; If the current system is determined to be in a steady state, then reactive power is distributed to the fixed capacitor and SVG according to the reactive power command issued by the AVC system and the preset coordination control rules; If the current system is determined to be in a transient state, the SVG is switched to local constant voltage control, and overload anomaly handling is performed according to the SVG control point voltage and current and the preset main loop auxiliary control rules. The step of determining the current system's transient stable state based on the upper and lower voltage limits issued by the AVC system includes: Determine whether the current voltage of the SVG constant voltage control point obtained from monitoring is within the range of the upper and lower voltage limits issued by the AVC system. If so, determine that the current system is in steady state; otherwise, determine that the current system is in transient state. The overload anomaly handling based on the SVG control point voltage and current and the preset main loop auxiliary control rules includes: If the current value reaches 90% of the rated value, and it is determined that the voltage change of the nth, n-1th and n-2th sampling points is greater than 0.1 half a cycle ago, then the inner current loop is set to 0 and the process lasts for 10ms; the voltage values ​​of the nth, n-1th and n-2th sampling points are per unit values. Before determining the current system's transient stable state based on the voltage upper and lower limits issued by the AVC system, the process further includes: The AVC substation sends the switching status of the SVG and fixed capacitors and the reactive power output of the SVG to the AVC master station. The AVC master station also pre-adds parameter models of the SVG and fixed capacitors and issues voltage upper and lower limits and reactive power commands to the AVC substation based on the current system power flow, voltage sensitivity and reactive power demand.

2. The dynamic coordinated control method for AVC and SVG in a new energy collection station according to claim 1, characterized in that, Before determining the current system's quasi-stable state based on the voltage upper and lower limits issued by the AVC system, the following steps are included: The switching status of SVG and fixed capacitors and the reactive power output of SVG are sent to the AVC system so that the AVC system can generate and issue upper and lower voltage limits and reactive power command values ​​based on the switching status, reactive power output of SVG, local SVG and fixed capacitor parameter models, current system power flow, system voltage sensitivity and system reactive power demand.

3. The dynamic coordinated control method for AVC and SVG in a new energy collection station according to claim 1, characterized in that, The reactive power distribution to fixed capacitors and SVG according to reactive power commands issued by the AVC system and preset coordination control rules includes: The current nonfunctionality is determined based on the SVG and the voltage at the fixed capacitor connection point. Based on the numerical comparison between the current reactive power capacity and the reactive power command, and according to the preset coordination control rules, reactive power allocation is performed on the fixed capacitor and SVG.

4. The dynamic coordinated control method for AVC and SVG in a new energy collection station according to claim 3, characterized in that, The step of allocating reactive power to the fixed capacitor and SVG based on the numerical comparison between the current reactive power capacity and the reactive power command, and according to preset coordination control rules, includes: If the current reactive power value does not exceed the set percentage of the reactive power command value, then adjust the transformer tap position and the SVG maintains constant reactive power control. If the current reactive power value exceeds a set percentage of the reactive power command value, then the number of fixed capacitor banks to be connected is determined according to the reactive power command value, and the difference between the total reactive power value of the fixed capacitor banks after determining the number of connected banks and the reactive power command value is determined as the reactive power target value of the SVG.

5. The dynamic coordinated control method for AVC and SVG in a new energy collection station according to claim 1, characterized in that, The step of switching the SVG to local constant voltage control includes: The SVG is controlled to absorb or generate reactive power according to a preset voltage target value.

6. A dynamic coordination control device for AVC and SVG in a new energy collection station, characterized in that, An SVG central control unit is used in new energy collection stations to connect the AVC system with the SVG and fixed capacitors. The AVC system includes an AVC master station and its subordinate AVC substations. The AVC substations forward the voltage upper and lower limits and reactive power command values ​​issued by the AVC master station to the SVG central control unit; including: The system quasi-stable state determination module is used to determine the current quasi-stable state of the system based on the upper and lower voltage limits issued by the AVC system. The steady-state reactive power distribution module is used to distribute reactive power to fixed capacitors and SVG according to the reactive power command issued by the AVC system and the preset coordination control rules if the current system is determined to be in a steady state. The transient reactive power distribution module is used to switch the SVG to local constant voltage control if the current system is determined to be in a transient state, and to perform overload abnormality handling according to the voltage and current of the SVG control point and the preset main loop auxiliary control rules. The system transient stability determination module includes: The control point voltage judgment unit is used to determine whether the current voltage of the SVG constant voltage control point obtained by monitoring is within the range of the upper and lower voltage limits issued by the AVC system. If it is, the current system is determined to be in steady state; otherwise, the current system is determined to be in transient state. The transient reactive power allocation module includes: The main loop auxiliary control unit is used to set the current inner loop to 0 and the process lasts for 10ms if it is determined that the voltage change of the nth, n-1th and n-2th sampling points is greater than 0.1 at the same time when the current value reaches 90% of the rated value; the voltage values ​​of the nth, n-1th and n-2th sampling points are per unit values. Before the system metastable state determination module determines the current system metastable state based on the upper and lower voltage limits issued by the AVC system, the following steps are also included: The AVC substation sends the switching status of the SVG and fixed capacitors and the reactive power output of the SVG to the AVC master station. The AVC master station also pre-adds parameter models of the SVG and fixed capacitors and issues voltage upper and lower limits and reactive power commands to the AVC substation based on the current system power flow, voltage sensitivity and reactive power demand.

7. The dynamic coordination control device for AVC and SVG in a new energy collection station according to claim 6, characterized in that, Also includes: The AVC command determination unit is used to send the switching status of SVG and fixed capacitor and the reactive power output of SVG to the AVC system, so that the AVC system can generate and issue voltage upper and lower limits and reactive power command values ​​based on the switching status, reactive power output of SVG, local SVG and fixed capacitor parameter models, current system power flow, system voltage sensitivity and system reactive power demand.

8. The dynamic coordination control device for AVC and SVG in a new energy collection station according to claim 6, characterized in that, The steady-state reactive power allocation module includes: A non-functionality determination unit is used to determine the current non-functionality based on the SVG and the voltage at the fixed capacitor connection point. The reactive power allocation unit is used to allocate reactive power to the fixed capacitor and SVG according to the numerical comparison relationship between the current reactive power capacity and the reactive power command and the preset coordination control rules.

9. The dynamic coordination control device for AVC and SVG in a new energy collection station according to claim 8, characterized in that, The reactive power distribution unit includes: The SVG constant reactive power control subunit is used to adjust the transformer tap position and maintain the constant reactive power control state if the current reactive power value exceeds a set percentage of the reactive power command value. The fixed capacitor priority allocation subunit is used to determine the number of fixed capacitor banks to be put into operation based on the value of the reactive power command if the current reactive power value does not exceed a set percentage of the reactive power command value, and to determine the reactive power target value of the SVG as the difference between the total reactive power value of the fixed capacitor banks after determining the number of banks to be put into operation and the value of the reactive power command.

10. The dynamic coordination control device for AVC and SVG at the new energy collection station according to claim 6, characterized in that, The transient reactive power allocation module includes: The SVG local constant voltage control unit is used to control the SVG to absorb or generate reactive power according to a preset voltage target value.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the dynamic coordination control method for AVC and SVG of the new energy collection station as described in any one of claims 1 to 5.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the dynamic coordination control method for AVC and SVG of the new energy collection station as described in any one of claims 1 to 5.

13. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by the processor, they implement the steps of the dynamic coordination control method for AVC and SVG of the new energy collection station as described in any one of claims 1 to 5.

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