CN114744689B - Reactive power coordination control method and system for new energy station with distributed phase modulators - Google Patents

Abstract

The invention relates to a reactive power coordination control method and a system for a new energy station with a distributed phase modulator, wherein the reactive power coordination control method comprises the following steps: determining a steady-state reactive power output range of the distributed phase modulator under different gears of a boost variable tap switch of the distributed phase modulator so as to determine the phase advancing/phase delaying capability of the distributed phase modulator; considering the phase advancing/delaying capability and the steady-state operation mode of the distributed phase modulator, and selecting the gear of the boost variable-speed tap changer of the distributed phase modulator; and judging whether the communication between the local control AVC substation of the new energy field station and the AVC main station of the system is smooth or not, and performing coordination control on the steady-state reactive output of the reactive power regulation equipment containing the distributed phase modulator according to the judgment result. The invention can ensure the reactive output capability of the distributed phase modulator, and can effectively suppress the transient overvoltage of a sending end system while meeting the reactive balance requirement of a new energy power generation system. The invention can be applied to the field of power transmission and distribution of power systems.

Description

Reactive power coordination control method and system of new energy power station with distributed camera

technical field

The invention relates to the technical field of power transmission and distribution in power systems, in particular to a method and system for coordinated control of reactive power in a new energy field station with distributed controllers.

Background technique

With the rapid development of new energy sources, the conventional power supply at the transmission end of UHVDC is gradually replaced by new energy sources, the voltage support capacity of the power system is reduced, and the transient overvoltage problem of the transmission end system is prominent. Studies have shown that only configuring large-capacity condensers in the converter station has limited effect on suppressing the transient overvoltage on the new energy side. The configuration of the distributed camera on the new energy side is more helpful to suppress the transient overvoltage of the system and prevent the high voltage of the new energy from being disconnected from the grid.

Different from the large-capacity condenser connected to the converter station, the distributed condenser connected to the new energy side will also participate in the steady-state reactive power balance of the system, that is, to compensate for the reactive power loss of the new energy collection system. At present, the distributed inverter has not been connected to the dispatching automatic voltage control system, and the distributed inverter lacks coordination with other reactive power regulation equipment in the new energy station. Existing researches on reactive power coordination control are mostly aimed at large-capacity inverters and other reactive power compensation equipment in converter stations, or SVC, SVG and static reactive power compensation equipment in new energy power generation systems, but have not dealt with the stabilization of distributed inverters. The coordinated control strategy of multi-type reactive power regulation equipment in distributed power generation system and distributed power generation system.

Therefore, there is an urgent need to carry out research on the reactive power coordination control method of new energy stations with distributed controllers. While taking into account the transient overvoltage suppression requirements of the sending-end system, it is necessary to ensure that distributed controllers and other power generation systems in the new energy power generation system. The reactive power adjustment equipment shall output reasonably according to the operating conditions of the system.

SUMMARY OF THE INVENTION

In view of the above-mentioned problems, the purpose of the present invention is to provide a method and system for coordinated control of reactive power in a new energy field station with distributed controllers, which can ensure the reactive power output capability of the distributed controllers, and meet the requirements of the new energy power generation system. At the same time, it realizes the effective suppression of the transient overvoltage of the sending end system.

In order to achieve the above purpose, the present invention adopts the following technical solutions: a method for coordinated control of reactive power in a new energy field station with distributed control cameras, which includes: The steady-state reactive power output range of the distributed camera is used to determine the phase advance/delay capability of the distributed camera; considering the phase advance/delay capability and steady-state operation mode of the distributed Distributed camera booster change tap changer gear; determine whether the communication between the local control AVC sub-station of the new energy station and the system AVC master station is smooth, and according to the judgment result, the stability of the reactive power regulating equipment containing the distributed camera is determined. state reactive power output for coordinated control.

为：Further, the steady-state reactive power output of the distributed camera

for:

为分布式调相机的机端电压标幺值；

为网侧电压标幺值；

为分布式调相机升压变导纳标幺值；

为升压变压器变比标幺值。In the formula,

is the per-unit value of the terminal voltage of the distributed camera;

is the grid-side voltage per unit value;

is the per-unit value of the boost variable admittance of the distributed camera;

is the per-unit value of the step-up transformer ratio.

Further, taking into account the phase advance/delay capability and steady-state operation mode of the distributed camera, the method for selecting the step-up tap-changer of the distributed camera includes:

的分接开关档位，

为分布式调相机额定容量；Within the steady-state operating range of the terminal voltage of the distributed camera and the operating range of the grid-side steady-state voltage, the reactive output of the distributed camera can be selected to achieve ±

position of the tap changer,

Rated capacity for distributed camera;

If there are multiple tap-changer positions that meet the requirements, the safe operation and system requirements of the distributed camera shall be comprehensively considered, and then the corresponding tap-changer position shall be selected.

Further, the local control AVC sub-station of the new energy field station communicates smoothly with the system AVC main station, and the method for coordinating and controlling the steady-state reactive power output of the reactive power regulating equipment containing the distributed camera controller includes:

An AVC control sub-module targeting transient overvoltage control is set, and the output result of the AVC control sub-module is used as a constraint condition of the steady-state voltage control model in the automatic voltage control system;

The automatic voltage control system sends an instruction to the reactive power regulating equipment including the distributed camera, new energy unit, power electronic dynamic reactive power compensation equipment, and low-voltage capacitors, and comprehensively selects the combination of reactive power regulating equipment.

Further, the AVC control sub-module analyzes the transient overvoltage response characteristics of different combinations of reactive power regulation equipment under typical faults through transient overvoltage calculation according to the operation of the new energy source, and obtains the response characteristics of each reactive power regulation equipment to the transient overvoltage. The voltage response factor, based on the response factor of each element to the transient overvoltage, determines the combination of reactive power regulation equipment that can improve the transient voltage safety of the power grid after the fault.

Further, the automatic voltage control system sends an instruction to the reactive power adjustment equipment including the distributed phase conditioner, new energy unit, power electronic dynamic reactive power compensation equipment, and low-voltage capacitor, and comprehensively selects the combination of reactive power adjustment equipment. ,include:

Priority is given to using the reactive power supply capability of the distributed camera, followed by the reactive power supply capability of the new energy unit. When the new energy unit is in full force and the system reactive power is insufficient, the power electronic dynamic reactive power compensation equipment is put into use, and finally used low voltage capacitors.

Further, the communication between the local control AVC sub-station of the new energy field station and the system AVC main station is not smooth, and the method for coordinating and controlling the steady-state reactive power output of the reactive power regulating equipment containing the distributed camera controller includes:

The reactive power output of the distributed inverter is calculated according to the active power output of the new energy source, and the sum of the reactive power reference value of the distributed inverter and the reactive power output of other types of reactive power equipment is equal to the reactive power loss of the new energy source.

A reactive power coordination control system for a new energy power generation system including a distributed camera, comprising: a first processing module for determining the steady state of a distributed camera under different gears of a step-up tap changer of the distributed camera The reactive power output range is used to determine the phase advance/delay capability of the distributed camera; the second processing module, taking into account the phase advance/delay capability and steady-state operation mode of the distributed camera, selects the The step-up switch of the camera adjusts the position of the tap changer; the coordination control module determines whether the communication between the local control AVC sub-station of the new energy station and the system AVC master station is smooth, and according to the judgment result, the reactive power adjustment equipment containing the distributed camera is adjusted. The steady-state reactive power output is coordinated and controlled.

A computer-readable storage medium storing one or more programs comprising instructions that, when executed by a computing device, cause the computing device to perform any of the above methods.

A computing device comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the The one or more programs include instructions for performing any of the above-described methods.

The present invention has the following advantages due to taking the above technical solutions:

The invention ensures the reactive power output capability of the distributed camera by rationally setting the step-up switch of the distributed camera, and realizes the transient state of the sending-end system while meeting the reactive power balance requirement of the new energy power generation system. The effective suppression of overvoltage can provide a reference for the dispatching operation of the actual power grid.

Description of drawings

FIG. 1 is a schematic overall flow diagram of a method for coordinated control of reactive power in a new energy field station with distributed cameras according to an embodiment of the present invention;

2 is a detailed flowchart of a coordinated control method in an embodiment of the present invention;

FIG. 3 is a schematic diagram of the steady-state reactive power output capability of a distributed camera in an embodiment of the present invention;

4 is a schematic diagram of reactive power consumed by new energy sources in an embodiment of the present invention;

5 is a schematic diagram of the influence of a low-voltage capacitor reactive power output of 50 Mvar on transient overvoltage in an embodiment of the present invention;

6 is a schematic diagram illustrating the influence of a new energy reactive power output of 50 Mvar on transient overvoltage in an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating the influence of a reactive power output of 50 Mvar of a distributed camera on transient overvoltage in an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The method and system for coordinating reactive power of a new energy power generation system with a distributed camera provided by the present invention include: determining the steady-state reactive power of the distributed camera under different gears of the step-up tap changer of the distributed camera. Output range to determine the phase advance/delay capability of the distributed camera; taking into account the phase advance/delay capability of the distributed camera and the steady-state operation mode, select the step-up tap changer gear of the distributed camera; Determine whether the communication between the local control AVC sub-station of the new energy station and the system AVC master station is smooth, and coordinate the control of the steady-state reactive power output of the reactive power regulating equipment with distributed cameras according to the judgment result. The invention can ensure the reactive power output capability of the distributed camera, and realize the effective suppression of the transient overvoltage of the sending end system while meeting the reactive power balance requirement of the new energy power generation system.

In an embodiment of the present invention, a method for coordinating reactive power control of a new energy field station with distributed controllers is provided. In this embodiment, the method is applied to a terminal for illustration. It can be understood that this method can also Applied to the server, it can also be applied to the system including the terminal and the server, and is realized through the interaction between the terminal and the server. The new energy power generation system in this embodiment includes, but is not limited to, a new energy field station, a new energy collection station, and a reactive power adjustment device thereof. In this embodiment, as shown in Figure 1 and Figure 2, the method includes the following steps:

1) Determine the steady-state reactive power output range of the distributed camera under different gears of the step-up tap-changer of the distributed camera to determine the phase advance/delay capability of the distributed camera;

2) Considering the phase advance/delay capability and steady-state operation mode of the distributed camera, select the step-up tap-changer gear of the distributed camera;

3) Determine whether the communication between the local control AVC sub-station of the new energy station and the system AVC main station is smooth, and coordinate the control of the steady-state reactive power output of the reactive power regulation equipment containing the distributed camera according to the judgment result.

为：In the above step 1), the steady-state reactive power output of the distributed control camera under different gears of the step-up tap-changer of the distributed control camera is calculated respectively, and then the steady-state reactive power output range is determined. Among them, the steady-state reactive power output of the distributed camera

for:

（1）

(1)

为分布式调相机的机端电压标幺值，稳态运行范围为0.925~1.075；

为网侧电压标幺值，稳态运行范围为0.97~1.07；

为分布式调相机升压变导纳标幺值；

为升压变压器变比标幺值，

数值为1表示运行在额定档位。In the formula,

is the per-unit value of the terminal voltage of the distributed camera, and the steady-state operating range is 0.925~1.075;

is the grid-side voltage per unit value, and the steady-state operating range is 0.97~1.07;

is the per-unit value of the boost variable admittance of the distributed camera;

is the per-unit value of the step-up transformer transformation ratio,

A value of 1 means running at the rated gear.

In the above step 2), taking into account the phase advance/delay capability and steady-state operation mode of the distributed camera, the method for selecting the step-up tap-changer of the distributed camera includes the following steps:

的分接开关档位，

为分布式调相机额定容量；2.1) Within the steady-state operating range of the terminal voltage of the distributed camera and the steady-state voltage operating range of the grid side, the reactive output of the distributed camera is selected to achieve ±

position of the tap changer,

Rated capacity for distributed camera;

2.2) If there are multiple tap-changer positions that meet the requirements, comprehensively consider the safe operation of the distributed camera and system requirements, and then select the corresponding tap-changer position.

In the above step 3), if the communication between the local control AVC sub-station of the new energy field station and the system AVC main station is smooth, the method for coordinating and controlling the steady-state reactive power output of the reactive power regulating equipment including the distributed camera controller includes the following steps:

3.1) Set the AVC control sub-module aiming at transient overvoltage control, and the output result of the AVC control sub-module is used as the constraint condition of the steady-state voltage control model in the automatic voltage control system;

3.2) The automatic voltage control system sends instructions to the reactive power adjustment equipment including distributed phase conditioners, new energy units, power electronic dynamic reactive power compensation equipment, and low-voltage capacitors, and comprehensively selects the combination of reactive power adjustment equipment.

Among them, the AVC control sub-module analyzes the transient overvoltage response characteristics of different reactive power regulating equipment combinations under typical faults through transient overvoltage calculation according to the operation of new energy sources, and obtains the response characteristics of each reactive power regulating equipment to transient overvoltage. Response factor: Based on the response factor of each element to transient overvoltage, determine the combination of reactive power regulation equipment that can improve the transient voltage safety of the power grid after a fault.

In this embodiment, preferably, the automatic voltage control system sends an instruction to the reactive power adjustment equipment including the distributed inverter, the new energy unit, the power electronic dynamic reactive power compensation equipment, and the low-voltage capacitor, and comprehensively selects the reactive power adjustment equipment. The specific combination is as follows: firstly use the reactive power supply capability of distributed cameras, and secondly use the reactive power supply capability of new energy units. Finally, use a low-voltage capacitor.

In the above step 3), if the communication between the local control AVC sub-station of the new energy station and the system AVC master station is not smooth, the method of coordinating the control of the steady-state reactive power output of the reactive power regulating equipment including the distributed camera is: according to the following steps: The active power output of new energy is used to calculate the reactive power output of the distributed inverter. The sum of the reactive power reference value of the distributed inverter and the reactive output of other types of reactive equipment is equal to the reactive power loss of the new energy collection.

Example

The above method of the present invention is further described by taking the reactive power coordinated operation control performed by a new energy power generation system A supporting a DC project in Northwest China as an example. The new energy power generation system A is connected to 1200MW photovoltaic, and 5 sets of 330kV collecting transformers are configured in the collecting station. The main transformer collects 240MW of photovoltaic power generation, and at the same time, the 35kV side of each main transformer is equipped with a 50Mvar controller and a 45Mvar capacitor. The short-circuit impedance of the step-up transformer of the distributed control camera is 11%, the rated capacity is 60MVA, and the step-up transformation ratio is 37±2×2.50%/10.5kV.

According to formula (1), the steady-state reactive power output capacity of the distributed inverter is calculated, and the steady-state reactive power output capacity of the 50Mvar distributed inverter in the new energy power generation system A is shown in Figure 3. In the steady-state voltage operating range of the system (35.89kV~39.59kV), the reactive power output of the distributed power conditioner is limited by two factors: the system voltage and the machine terminal voltage. As shown in Figure 3, the step-up transformation ratio is 1.025, and the reactive power output range of the camera is the part between line ③ (limited by the terminal voltage of 1.075p.u.) and line ④ (limited by the terminal voltage of 0.925p.u.). If it is necessary to increase the reactive power output within this range, the taps can be adjusted appropriately to increase the step-up transformation ratio (as shown by the transformation ratio 1.05 ① line in Figure 3). Similarly, the reactive power output of the camera can also be reduced by reducing the transformation ratio.

During steady-state operation, the phase-delaying operating voltage of the distributed inverter cannot be higher than 11.2875kV, and the phase-advancing operating voltage cannot be lower than 9.7125kV. At the same time, the actual steady-state operating voltage of the distributed inverter booster is about 37kV. In order to take into account the phase advance capability of the camera and the steady-state operation mode, through the simulation calculation, it is recommended that the step-up transformer of the distributed camera operates at 37.925kV, which is the first gear (transformation ratio 1.025).

First of all, when the high-voltage bus voltage of the distributed camera is running at the minimum steady-state operating voltage of 35.89kV, and the rated gear (1) is adopted, it is limited by the steady-state operating range of the terminal voltage of 9.7125~11.2875kV, and the steady-state reactive power output of the camera is limited. The capacity is -23Mvar~50Mvar; when the positive 1st gear (1.025), the steady-state reactive power output range is -11Mvar~50Mvar; when the positive 2nd gear (1.05), the steady-state reactive power output range is 1Mvar~50Mvar; while the negative 1st gear (0.975), the steady-state reactive power output range is -35Mvar~47Mvar, and the rated hysteresis capability cannot be guaranteed. Secondly, when the high-voltage bus voltage of the distributed camera is running at the maximum steady-state operating voltage of 39.59kV, and the rated gear (1) is adopted, it is limited by the steady-state operating range of the terminal voltage of 9.7125~11.2875kV, and the steady-state reactive power output of the camera is limited. The capacity is -50Mvar~3Mvar; when the positive 1st gear (1.025), the steady-state reactive power output range is -50Mvar~18Mvar; when the positive 2nd gear (1.05), the steady-state reactive power output range is -47Mvar~33Mvar, and the rated power cannot be guaranteed. Phase advancement capability.

Both the rated gear and the positive first gear can meet the stable operation requirements of the distributed camera in the range of -50Mvar~50Mvar. However, according to the needs of the system, the steady-state output range of the camera is usually between the small output of the advanced phase and the large output of the delayed phase. Taking into account the safe operation and system requirements of the distributed inverter, the main requirement of the new energy collection station for the distributed inverter is that it has a strong ability to suppress overvoltage when the voltage of the booster-to-high voltage bus is suddenly increased. Therefore, in the existing Under the calculation parameters, the tap changer of the step-up transformer of the distributed inverter is selected as the positive 1st gear (37.925kV). Scheduling can be flexibly adjusted during operation according to actual system requirements and operating parameters.

Distributed condensers and capacitors should be reasonably adjusted according to the needs of the system, especially the power changes of new energy stations, to meet the needs of reactive power balance. According to the calculation, the reactive power consumed by the new energy collection system is shown in Figure 4. Considering the steady state of the new energy power generation system, the reactive power of the system can be balanced by the distributed condenser, the low-voltage capacitor and the new energy station itself.

If the communication between the local control AVC sub-station of the new energy station and the system AVC main station is smooth, the system AVC system should reasonably issue the instruction of switching capacitors according to the output of the new energy and the operating conditions of the system, and at the same time issue the reactive power of the distributed camera. Control command (increase and decrease magnetic command). As shown in Figures 5 to 7, the simulation calculation shows that the method of "distributed camera with large reactive power output + less capacitor input" is better than the "priority new energy reactive output" method and the "distributed camera with small reactive power output + more input" method. The transient overvoltage level of the "low-voltage capacitor" method is slightly lower, which verifies the effectiveness of the proposed method. According to the simulation calculation, in steady-state operation, the AVC system can send commands to the distributed camera, new energy, and low-capacity switching according to the operation of the new energy. The ability to provide energy reactive power, and finally use low-voltage capacitors when the new energy is developed and the system reactive power is insufficient.

If the communication between the local control AVC substation of the new energy field station and the system AVC main station is not smooth, control each group of 330kV transformers individually, and according to step 3), calculate the reactive power output that the distributed power conditioner should have according to the active power output of the new energy source. When the active power is greater than 180MW, the low-voltage capacitor bank is put in. When the active power is less than 160MW, the capacitor bank is cut off. The sum of the reactive power reference value of the distributed condenser and the reactive power value of the capacitor is equal to the reactive power loss of the new energy collection.

To sum up, the present invention ensures the reactive power output capability of the distributed camera by reasonably setting the step-up switch of the distributed camera, and ensures the reactive power of the new energy power generation system by coordinating various types of reactive power adjustment equipment. At the same time of balance, the effective suppression of the transient overvoltage of the sending-end system is realized, which can provide a reference for the dispatching operation of the actual power grid, and has high practical value.

In one embodiment of the present invention, there is provided a reactive power coordination control system for a new energy power generation system including distributed inverters, which includes:

The first processing module determines the steady-state reactive power output range of the distributed camera under different gears of the step-up tap-changer of the distributed camera, so as to determine the phase advance/delay capability of the distributed camera;

The second processing module, taking into account the phase advance/delay capability and steady-state operation mode of the distributed camera, selects the step-up tap-changer gear of the distributed camera;

The coordination control module determines whether the communication between the local control AVC sub-station of the new energy station and the system AVC master station is smooth, and according to the determination result, it coordinates and controls the steady-state reactive power output of the reactive power regulating equipment including the distributed camera.

The system provided in this embodiment is used to execute the foregoing method embodiments. For specific processes and details, please refer to the foregoing embodiments, which will not be repeated here.

In the computing device structure provided in an embodiment of the present invention, the computing device may be a terminal, which may include: a processor (processor), a communications interface (Communications Interface), a memory (memory), a display screen, and an input device. Among them, the processor, the communication interface and the memory complete the communication with each other through the communication bus. The processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. When the computer program is executed by the processor, a new energy station including a distributed camera is realized. A reactive power coordination control method; the internal memory provides an environment for the operation of an operating system and a computer program in a non-volatile storage medium. The communication interface is used for wired or wireless communication with an external terminal, and the wireless communication can be realized by WIFI, a management network, NFC (Near Field Communication) or other technologies. The display screen may be a liquid crystal display screen or an electronic ink display screen, and the input device may be a touch layer covered on the display screen, a button, a trackball or a touchpad set on the casing of the computing device, or an external Keyboard, trackpad or mouse, etc. The processor can call the logic instructions in the memory to execute the following method: determine the steady-state reactive power output range of the distributed camera under different gears of the step-up tap-changer of the distributed camera, so as to determine the distributed camera The phase advancing/delaying capability of the distributed camera is selected; considering the phase advancing/delaying capability of the distributed camera and the steady-state operation mode, the step-up tap-changer position of the distributed camera is selected; Whether the communication between the station and the system AVC master station is smooth, according to the judgment result, the steady-state reactive power output of the reactive power regulating equipment including the distributed condenser is coordinated and controlled.

In addition, the above-mentioned logic instructions in the memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

Those skilled in the art can understand that the structure of the above-mentioned computing device is only a partial structure related to the solution of the present application, and does not constitute a limitation on the computing device to which the solution of the present application is applied, and the specific computing device may include more or Fewer components, or some components are combined, or have a different arrangement of components.

In one embodiment of the present invention, there is provided a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, when the program instructions When executed by the computer, the computer can execute the methods provided by the above method embodiments, for example, including: determining the steady-state reactive power output range of the distributed camera under different gears of the step-up tap-changer of the distributed camera, Determine the phase advance/delay capability of the distributed camera; take into account the phase advance/delay capability and steady-state operation mode of the distributed camera, select the step-up tap-changer gear of the distributed camera; determine the new energy The station locally controls whether the communication between the AVC sub-station and the system AVC master station is smooth, and according to the judgment result, the steady-state reactive power output of the reactive power regulating equipment including the distributed camera is coordinated and controlled.

In one embodiment of the present invention, a non-transitory computer-readable storage medium is provided, where the non-transitory computer-readable storage medium stores server instructions, the computer instructions cause a computer to execute the methods provided in the above embodiments, for example, including : Determine the steady-state reactive power output range of the distributed camera under different gears of the step-up tap-changer of the distributed camera to determine the phase advance/delay capability of the distributed camera; take into account the distributed camera To determine whether the communication between the local control AVC sub-station of the new energy station and the system AVC master station is smooth, according to the judgment result, the Coordinated control of steady-state reactive power output of reactive power conditioning equipment with distributed cameras.

The implementation principle and technical effect of the computer-readable storage medium provided by the above-mentioned embodiments are similar to those of the above-mentioned method embodiments, and details are not described herein again.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowcharts and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in one or more of the flowcharts and/or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions An apparatus implements the functions specified in a flow or flows of the flowcharts and/or a block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in one or more of the flowcharts and/or one or more blocks of the block diagrams.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. a new energy field station reactive power coordination control method containing distributed camera, is characterized in that, comprises: Determine the steady-state reactive power output range of the distributed camera under different gears of the step-up tap-changer of the distributed camera to determine the phase-advance or phase-delay capability of the distributed camera; Taking into account the phase advance or phase delay capability and steady-state operation mode of the distributed camera, select the step-up tap-changer gear of the distributed camera; Determine whether the communication between the local control AVC sub-station of the new energy field station and the system AVC main station is smooth, and coordinately control the steady-state reactive power output of the reactive power regulating equipment containing the distributed camera according to the judgment result; The steady-state reactive power output of the distributed camera

for:

In the formula,

is the per-unit value of the terminal voltage of the distributed camera;

is the grid-side voltage per unit value;

is the per-unit value of the boost variable admittance of the distributed camera;

is the per-unit value of the step-up transformer transformation ratio; The method for selecting the step-up tap-changer position of the distributed camera, taking into account the phase-advance or phase-delay capability and the steady-state operation mode of the distributed camera, includes: Within the steady-state operating range of the terminal voltage of the distributed camera and the operating range of the grid-side steady-state voltage, the reactive output of the distributed camera can be selected to achieve ±

position of the tap changer,

Rated capacity for distributed camera; If there are multiple tap-changer positions that meet the requirements, comprehensively consider the safe operation of the distributed camera and system requirements, and then select the corresponding tap-changer position; The local control AVC sub-station of the new energy field station communicates smoothly with the system AVC main station, and the method for coordinating and controlling the steady-state reactive power output of the reactive power regulating equipment containing the distributed control camera includes: An AVC control sub-module targeting transient overvoltage control is set, and the output result of the AVC control sub-module is used as a constraint condition of the steady-state voltage control model in the automatic voltage control system; Sending instructions from the automatic voltage control system to the reactive power regulating equipment including the distributed phase conditioner, new energy unit, power electronic dynamic reactive power compensation equipment, and low-voltage capacitors, and comprehensively selects the combination of reactive power regulating equipment; The local control AVC sub-station of the new energy field station cannot communicate well with the system AVC main station, and the method for coordinating and controlling the steady-state reactive power output of the reactive power regulating equipment containing the distributed camera controller includes: The reactive power output of the distributed inverter is calculated according to the active power output of the new energy source, and the sum of the reactive power reference value of the distributed inverter and the reactive power output of other types of reactive power equipment is equal to the reactive power loss of the new energy source. 2. The method for coordinating reactive power control of a new energy field station with distributed cameras as claimed in claim 1, wherein the AVC control sub-module calculates the power consumption under typical fault conditions through transient overvoltage calculation according to the operation of the new energy source. The transient overvoltage response characteristics of different combinations of reactive power regulating equipment are analyzed, and the response factors of each reactive power regulating equipment to transient overvoltage are obtained. A combination of reactive power regulation equipment for state voltage safety. 3. The method for coordinating reactive power control of a new energy field station containing a distributed power conditioner according to claim 1, wherein the automatic voltage control system to the control method containing the distributed power conditioner, the new energy unit, Power electronic dynamic reactive power compensation equipment and reactive power adjustment equipment of low-voltage capacitors send commands to comprehensively select the combination of reactive power adjustment equipment, including: Priority is given to using the reactive power supply capability of the distributed camera, followed by the reactive power supply capability of the new energy unit. When the new energy unit is in full force and the system reactive power is insufficient, the power electronic dynamic reactive power compensation equipment is put into use, and finally used low voltage capacitors. 4. A reactive power coordination control system for a new energy power generation system containing distributed cameras, characterized in that it comprises: The first processing module determines the steady-state reactive power output range of the distributed camera under different gears of the step-up tap-changer of the distributed camera, so as to determine the phase-advance or phase-delay capability of the distributed camera; The second processing module, taking into account the phase-advance or phase-delay capability and steady-state operation mode of the distributed camera, selects the step-up tap-changer gear of the distributed camera; The coordination control module determines whether the communication between the local control AVC sub-station of the new energy station and the system AVC master station is smooth, and according to the determination result, performs coordinated control on the steady-state reactive power output of the reactive power regulating equipment containing the distributed camera; The steady-state reactive power output of the distributed camera

for:

In the formula,

is the per-unit value of the terminal voltage of the distributed camera;

is the grid-side voltage per unit value;

is the per-unit value of the boost variable admittance of the distributed camera;

is the per-unit value of the step-up transformer transformation ratio; The method for selecting the step-up tap-changer position of the distributed camera, taking into account the phase-advance or phase-delay capability and the steady-state operation mode of the distributed camera, includes: Within the steady-state operating range of the terminal voltage of the distributed camera and the operating range of the grid-side steady-state voltage, the reactive output of the distributed camera can be selected to achieve ±

position of the tap changer,

Rated capacity for distributed camera; If there are multiple tap-changer positions that meet the requirements, comprehensively consider the safe operation of the distributed camera and system requirements, and then select the corresponding tap-changer position; The local control AVC sub-station of the new energy field station communicates smoothly with the system AVC main station, and the method for coordinating and controlling the steady-state reactive power output of the reactive power regulating equipment containing the distributed control camera includes: An AVC control sub-module targeting transient overvoltage control is set, and the output result of the AVC control sub-module is used as a constraint condition of the steady-state voltage control model in the automatic voltage control system; Sending instructions from the automatic voltage control system to the reactive power regulating equipment including the distributed phase conditioner, new energy unit, power electronic dynamic reactive power compensation equipment, and low-voltage capacitors, and comprehensively selects the combination of reactive power regulating equipment; The local control AVC sub-station of the new energy field station cannot communicate well with the system AVC main station, and the method for coordinating and controlling the steady-state reactive power output of the reactive power regulating equipment containing the distributed camera controller includes: The reactive power output of the distributed inverter is calculated according to the active power output of the new energy source, and the sum of the reactive power reference value of the distributed inverter and the reactive power output of other types of reactive power equipment is equal to the reactive power loss of the new energy source. 5. A computer-readable storage medium storing one or more programs, characterized in that the one or more programs comprise instructions that, when executed by a computing device, cause the computing device to perform as claimed in the claims Any of the methods described in 1 to 3. 6. A computing device, comprising: one or more processors, a memory, and one or more programs, wherein one or more programs are stored in the memory and configured as the one or more programs A processor executes the one or more programs comprising instructions for performing any of the methods of claims 1 to 3.

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