Reactive power regulation method and device for new energy station phase modifier

Abstract

The invention provides a reactive power regulation method and device for a phase modifier of a new energy station, and the method comprises the steps: collecting reactive power instructions corresponding to a plurality of devices in a target new energy station, the plurality of devices comprising a new energy cluster, a static var generator and a phase modifier; acquiring main power transformation gas volume data and boost power transformation gas volume data of the target new energy station and current reactive power of each device; determining the terminal voltage variation of the phase modifier according to the main power transformation gas volume data, the boost power transformation gas volume data and the current reactive power and reactive power instruction of each piece of equipment; and completing reactive power regulation of the phase modifier according to the terminal voltage variation. According to the invention, on the basis of realizing constant voltage control of the phase modifier, reactive power shunting at the phase modifier side is effectively inhibited, reactive power regulation of the phase modifier is realized, and the AVC regulation efficiency can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of power system automation, and in particular to a reactive power regulation method and device for a phase regulator in a new energy station. Background Art

[0002] There is a lack of supporting power sources near most new energy bases, and the transmission capacity is severely limited. Deploying distributed phase-shifting machines at new energy stations is an economical and effective measure to improve the short-circuit ratio of multiple new energy stations, which can greatly increase the transmission limit of new energy stations and has broad prospects.

[0003] When the phase regulator adopts voltage control, after the automatic voltage control system (AVC) of the new energy station has adjusted the reactive power of other equipment (such as new energy clusters and static VAR generators SVG) in the new energy station, the phase regulator, as a voltage source node, i.e., a PV node, will maintain its terminal voltage constant. In order to maintain the constant terminal voltage of the phase regulator, the phase regulator will have reactive power reverse flow and maintain, causing the reactive power emitted / absorbed by other equipment to be diverted on the phase regulator side, rather than all injected into / from the station grid connection point. In other words, the reverse reactive power regulation of the phase regulator may offset the reactive power regulation effect of other equipment and reduce the AVC regulation efficiency.

[0004] When the phase regulator adopts the fixed reactive power control mode, it can follow the AVC to issue reactive power instructions and maintain them, but it is necessary to assume that the operating conditions of the system remain unchanged within each AVC regulation instruction cycle. Under conditions such as changes in the active output of new energy or system failures, as long as the AVC cannot collect extreme blocking conditions such as bus voltage exceeding the limit, the phase regulator still receives the previous instructions of the AVC through the reactive outer loop for regulation, resulting in excessive intervention of the AVC in the phase regulator's own regulation. The phase regulator may be regulated according to outdated or inaccurate instructions, resulting in its inability to effectively respond to actual voltage regulation needs, which restricts the voltage source characteristics of the phase regulator throughout the process, and is contrary to the original intention of deploying the phase regulator to provide voltage support. Summary of the invention

[0005] In response to at least one problem in the prior art, the present application proposes a reactive power regulation method and device for a phase regulator in a new energy station, which can effectively suppress reactive power diversion on the phase regulator side on the basis of achieving constant voltage control of the phase regulator, thereby achieving reactive power regulation of the phase regulator and ensuring the regulation efficiency of AVC.

[0006] In order to solve the above technical problems, this application provides the following technical solutions:

[0007] In a first aspect, the present application provides a reactive power regulation method for a phase regulator of a new energy station, comprising:

[0008] Collect reactive power instructions corresponding to a plurality of devices in a target new energy station, wherein the plurality of devices include: a new energy cluster, a static VAR generator and a phase regulator;

[0009] Obtaining the main transformer electrical quantity data, step-up transformer electrical quantity data and current reactive power of each of the devices of the target new energy station;

[0010] According to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device, the terminal voltage change of the phase modulator is determined; according to the terminal voltage change, the reactive power regulation of the phase modulator is completed.

[0011] In one embodiment, the main transformer electrical quantity data includes: the reactive power on the low voltage side of the main transformer, the active power on the low voltage side of the main transformer and the reactive power on the high voltage side of the main transformer; the boost transformer electrical quantity data includes: the reactive power on the high voltage side of the boost transformer and the reactive power on the low voltage side of the boost transformer.

[0012] In one embodiment, the determining the terminal voltage change of the phase regulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each of the devices includes:

[0013] According to the reactive power command corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power command, the reactive power on the high-voltage side of the boost transformer, the reactive power on the low-voltage side of the boost transformer, the reactive power command of the phase regulator and the reactive power on the low-voltage side of the main transformer, the reactive power estimation value on the low-voltage side of the main transformer is obtained;

[0014] Obtaining a reactive power estimate value of the main transformer high-voltage side according to the active power of the main transformer low-voltage side, the reactive power of the main transformer low-voltage side, the reactive power of the main transformer high-voltage side, and the reactive power estimate value of the main transformer low-voltage side;

[0015] Determine the voltage estimate of the main transformer high-voltage side bus according to the estimated reactive power value on the main transformer high-voltage side, the reactive power on the main transformer high-voltage side, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage;

[0016] The estimated value of the machine-end voltage of the phase regulator is obtained based on the estimated voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer; the change of the machine-end voltage of the phase regulator is determined based on the estimated value of the machine-end voltage of the phase regulator, the pre-acquired upper and lower limits of the machine-end voltage and the maximum adjustment step.

[0017] In one embodiment, the reactive power command corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power command, the high-voltage side reactive power of the boost transformer, the low-voltage side reactive power of the boost transformer, the reactive power command of the phase regulator and the low-voltage side reactive power of the main transformer are used to obtain the reactive power estimation value of the low-voltage side of the main transformer, including:

[0018] According to the reactive power instruction of the new energy cluster, the current reactive power and the pre-acquired installed capacity under the main transformer, the reactive power change value of the new energy cluster regulating the reactive power corresponding to the low-voltage side reactive power of the main transformer is obtained;

[0019] According to the current reactive power and reactive power command of the static VAR generator, a change value of the reactive power of the static VAR generator corresponding to the reactive power of the main transformer low voltage side is obtained;

[0020] According to the reactive power instruction of the phase regulator, the reactive power on the high-voltage side of the boost transformer and the reactive power on the low-voltage side of the boost transformer, a change value of the reactive power adjusted by the phase regulator corresponding to the reactive power on the low-voltage side of the main transformer is obtained;

[0021] According to the reactive power on the low-voltage side of the main transformer, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the new energy cluster, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the static VAR generator, and the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the phase regulator, an estimated value of the reactive power on the low-voltage side of the main transformer is obtained.

[0022] In one embodiment, obtaining the estimated reactive power value of the main transformer high-voltage side according to the active power of the main transformer low-voltage side, the reactive power of the main transformer low-voltage side, the reactive power of the main transformer high-voltage side and the estimated reactive power value of the main transformer low-voltage side includes:

[0023] Obtain an estimated value of reactive power loss on the high-voltage side of the main transformer according to the active power on the low-voltage side of the main transformer, the reactive power on the low-voltage side of the main transformer, the reactive power on the high-voltage side of the main transformer, and the estimated value of reactive power on the low-voltage side of the main transformer;

[0024] The estimated reactive power value on the high-voltage side of the main transformer is obtained according to the estimated reactive power loss value on the high-voltage side of the main transformer and the reactive power on the low-voltage side of the main transformer.

[0025] In one embodiment, obtaining the estimated terminal voltage of the phase regulator according to the estimated voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer includes:

[0026] Determine an estimated voltage value of the main transformer low-voltage side busbar according to an estimated voltage value of the main transformer high-voltage side busbar and a pre-acquired real-time transformation ratio of the main transformer;

[0027] According to the estimated voltage value of the low-voltage side busbar of the main transformer and the pre-acquired real-time transformation ratio of the boost transformer, the estimated voltage value of the low-voltage side busbar of the boost transformer is determined as the estimated terminal voltage value of the phase regulator.

[0028] In one embodiment, determining the change in the terminal voltage of the phase regulator according to the estimated terminal voltage of the phase regulator, the pre-acquired upper and lower limits of the terminal voltage, and the maximum adjustment step size includes:

[0029] Determining an initial terminal voltage setting value of the phase modulator according to the estimated terminal voltage of the phase modulator and the pre-acquired upper and lower limits of the terminal voltage;

[0030] Collecting the current terminal voltage of the phase regulator, and determining the terminal voltage setting value of the phase regulator according to the maximum adjustment step, the initial terminal voltage setting value and the current terminal voltage;

[0031] The change in the machine terminal voltage of the phase modulator is determined according to the current machine terminal voltage and the machine terminal voltage setting value.

[0032] In one embodiment, before determining the voltage estimate of the main transformer high-voltage side bus according to the main transformer high-voltage side reactive power estimate, the main transformer high-voltage side reactive power, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage, the method further includes:

[0033] When the new energy cluster or static reactive generator in the target new energy station emits or absorbs reactive power alone, the voltage change and reactive power change of the busbar on the high-voltage side of the main transformer are obtained;

[0034] The voltage sensitivity of the main transformer high-voltage side bus is obtained according to the voltage change and reactive power change of the main transformer high-voltage side bus.

[0035] In one embodiment, the reactive power regulation of the phase regulator is completed according to the terminal voltage variation, including:

[0036] The machine-end voltage variation is added to the machine-end voltage control loop to complete the reactive power regulation of the phase regulator.

[0037] In a second aspect, the present application provides a reactive power regulation device for a phase regulator of a new energy station, comprising:

[0038] A collection module, used to collect reactive power instructions corresponding to multiple devices in a target new energy station, wherein the multiple devices include: a new energy cluster, a static reactive power generator and a phase regulator;

[0039] An acquisition module, used to acquire the main transformer electrical quantity data, boost transformer electrical quantity data and current reactive power of each of the devices of the target new energy site;

[0040] The reactive power regulation module is used to determine the terminal voltage change of the phase regulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device; and complete the reactive power regulation of the phase regulator according to the terminal voltage change.

[0041] In one embodiment, the main transformer electrical quantity data includes: the reactive power on the low voltage side of the main transformer, the active power on the low voltage side of the main transformer and the reactive power on the high voltage side of the main transformer; the boost transformer electrical quantity data includes: the reactive power on the high voltage side of the boost transformer and the reactive power on the low voltage side of the boost transformer.

[0042] In one embodiment, the reactive power regulation module includes:

[0043] The first reactive power estimation unit is used to obtain the reactive power estimation value of the low-voltage side of the main transformer according to the reactive power command corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power command, the reactive power of the high-voltage side of the boost transformer, the reactive power of the low-voltage side of the boost transformer, the reactive power command of the phase regulator and the reactive power of the low-voltage side of the main transformer;

[0044] A second reactive power estimation unit is used to obtain a reactive power estimation value of the main transformer high-voltage side according to the active power of the main transformer low-voltage side, the reactive power of the main transformer low-voltage side, the reactive power of the main transformer high-voltage side and the reactive power estimation value of the main transformer low-voltage side;

[0045] A first determining unit is used to determine an estimated voltage value of the main transformer high-voltage side bus according to the estimated reactive power value on the main transformer high-voltage side, the reactive power on the main transformer high-voltage side, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage;

[0046] The second determination unit is used to obtain the estimated value of the machine-end voltage of the phase modulator according to the estimated value of the voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer; and determine the machine-end voltage change of the phase modulator according to the estimated value of the machine-end voltage of the phase modulator, the pre-acquired upper and lower limits of the machine-end voltage and the maximum adjustment step.

[0047] In one embodiment, the first reactive power estimation unit is configured to perform:

[0048] According to the reactive power instruction of the new energy cluster, the current reactive power and the pre-acquired installed capacity under the main transformer, the reactive power change value of the new energy cluster regulating the reactive power corresponding to the low-voltage side reactive power of the main transformer is obtained;

[0049] According to the current reactive power and reactive power command of the static VAR generator, a change value of the reactive power of the static VAR generator corresponding to the reactive power of the main transformer low voltage side is obtained;

[0050] According to the reactive power instruction of the phase regulator, the reactive power on the high-voltage side of the boost transformer and the reactive power on the low-voltage side of the boost transformer, a change value of the reactive power adjusted by the phase regulator corresponding to the reactive power on the low-voltage side of the main transformer is obtained;

[0051] According to the reactive power on the low-voltage side of the main transformer, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the new energy cluster, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the static VAR generator, and the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the phase regulator, an estimated value of the reactive power on the low-voltage side of the main transformer is obtained.

[0052] In one embodiment, the second reactive power estimation unit is configured to perform:

[0053] Obtain an estimated value of reactive power loss on the high-voltage side of the main transformer according to the active power on the low-voltage side of the main transformer, the reactive power on the low-voltage side of the main transformer, the reactive power on the high-voltage side of the main transformer, and the estimated value of reactive power on the low-voltage side of the main transformer;

[0054] The estimated reactive power value on the high-voltage side of the main transformer is obtained according to the estimated reactive power loss value on the high-voltage side of the main transformer and the reactive power on the low-voltage side of the main transformer.

[0055] In one embodiment, the second determining unit is configured to perform:

[0056] Determine an estimated voltage value of the main transformer low-voltage side busbar according to an estimated voltage value of the main transformer high-voltage side busbar and a pre-acquired real-time transformation ratio of the main transformer;

[0057] According to the estimated voltage value of the low-voltage side busbar of the main transformer and the pre-acquired real-time transformation ratio of the boost transformer, the estimated voltage value of the low-voltage side busbar of the boost transformer is determined as the estimated terminal voltage value of the phase regulator.

[0058] In one embodiment, the second determining unit is configured to perform:

[0059] Determining an initial terminal voltage setting value of the phase modulator according to the estimated terminal voltage of the phase modulator and the pre-acquired upper and lower limits of the terminal voltage;

[0060] Collecting the current terminal voltage of the phase regulator, and determining the terminal voltage setting value of the phase regulator according to the maximum adjustment step, the initial terminal voltage setting value and the current terminal voltage;

[0061] The change in the machine terminal voltage of the phase modulator is determined according to the current machine terminal voltage and the machine terminal voltage setting value.

[0062] In one embodiment, the reactive power regulation device of the phase regulator of the new energy station further includes:

[0063] A variation acquisition module is used to acquire the voltage variation and reactive power variation of the main transformer high-voltage side bus when the new energy cluster or static reactive generator in the target new energy station emits or absorbs reactive power alone;

[0064] The sensitivity determination module is used to obtain the voltage sensitivity of the main transformer high-voltage side bus according to the voltage change and reactive power change of the main transformer high-voltage side bus.

[0065] In one embodiment, the reactive power regulation module includes:

[0066] The superposition unit is used to superimpose the machine-end voltage variation onto the machine-end voltage control loop to complete the reactive power regulation of the phase regulator.

[0067] In a third aspect, the present 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 implements the reactive power regulation method of the phase regulator of the new energy station when executing the program.

[0068] In a fourth aspect, the present application provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the reactive power regulation method of the phase regulator in a new energy station.

[0069] It can be seen from the above technical scheme that the present application provides a reactive power regulation method and device for a phase regulator in a new energy station. The method includes: collecting reactive power instructions corresponding to multiple devices in the target new energy station, the multiple devices including: a new energy cluster, a static reactive generator and a phase regulator; obtaining the main transformer electrical quantity data, the step-up transformer electrical quantity data and the current reactive power of each of the devices in the target new energy station; determining the machine-end voltage change of the phase regulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each of the devices; completing the reactive power regulation of the phase regulator according to the machine-end voltage change, which can effectively suppress reactive power shunting on the phase regulator side on the basis of realizing constant voltage control of the phase regulator, realize reactive power regulation of the phase regulator, and thus guarantee the regulation efficiency of AVC; specifically, it can guarantee the voltage source characteristics of the phase regulator at all time scales while effectively suppressing reactive power shunting, guarantee the regulation efficiency of AVC, and maximize the voltage support and regulation function of the distributed phase regulator in the new energy station. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0071] Figure 1 It is a first flow chart of the reactive power regulation method of the phase regulator of the new energy station in the embodiment of the present application;

[0072] Figure 2 It is a topological diagram of a new energy station in an embodiment of the present application;

[0073] Figure 3 It is a second flow chart of the reactive power regulation method of the phase regulator of the new energy station in the embodiment of the present application;

[0074] Figure 4 This is a schematic diagram of a machine-end voltage change amount superimposed on a machine-end voltage control loop in an example of the present application;

[0075] Figure 5 It is a flow chart of a reactive power regulation method of a phase regulator in a new energy station in an application example of the present application;

[0076] Figure 6 It is a schematic diagram of a transformer real-time ratio calculation model in an application example of the present application;

[0077] Figure 7 It is a comparative schematic diagram of the bus voltage on the high-voltage side of the main transformer and the reactive response characteristics of each device in an example of the present application;

[0078] Figure 8 It is a structural schematic diagram of a reactive power regulation device of a phase regulator of a new energy station in an embodiment of the present application;

[0079] Fig. 9 It is a schematic block diagram of the system structure of the electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0080] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0081] New energy stations are different from UHV DC converter stations. New energy stations include a variety of different types of equipment, such as new energy clusters, SVGs, and phase regulators. The following problems were found in the AVC strategy verification test of phase regulators connected to new energy stations:

[0082] (1) Under steady-state operation, the phase regulator is in reactive closed-loop regulation, which weakens the "voltage source" characteristic and reduces the suppression effect of station bus voltage fluctuations caused by rapid changes in wind turbine output. However, this solution can cancel the reactive closed-loop, and the phase regulator can achieve full-time constant voltage control.

[0083] (2) During the system fault recovery process, the reactive outer loop of the phase regulator still receives the previous cycle command of the AVC substation (the cycle is generally 15-30s) to participate in the regulation and no longer maintains constant voltage control. In severe cases, it may induce repeated low voltage penetration of the new energy cluster.

[0084] (3) When the phase regulator adopts voltage control, after other equipment in the station adjusts reactive power, the phase regulator, as a PV node, will reversely adjust reactive power and maintain it in order to maintain constant voltage at the machine end, causing reactive power emitted / absorbed by other equipment to be diverted at the phase regulator side, and not all injected into / from the grid connection point of the station, reducing the AVC adjustment speed. While this scheme adopts constant voltage control, it can calculate the change of phase regulator terminal voltage when other equipment or the phase regulator itself needs to adjust reactive power through power flow calculation, and make corresponding machine end voltage adjustment, which can realize reactive power diversion and reactive power adjustment of the phase regulator itself.

[0085] In order to solve at least one of the problems in the above-mentioned prior art, the embodiment of the present application provides a reactive power regulation method and device for a phase regulator in a new energy station. First, the AVC substation measures the reactive voltage sensitivity on the high-voltage side of the main transformer of the new energy station, receives the bus voltage control target on the high-voltage side of the main transformer issued by the AVC main station, and distributes reactive power instructions to the wind turbine, SVG, and phase regulator; secondly, the AVC substation collects electrical quantity data such as active power, reactive power, and bus voltage of the main transformer and phase regulator step-up transformer of the new energy station, and calculates the real-time transformation ratio of each transformer in combination with the nameplate parameters of each transformer and the equivalent model; then, the reactive power instructions and reactive current values ​​of the wind turbine, SVG, and phase regulator are used to calculate the reactive power of each device The reactive power change corresponds to the reactive power change on the low-voltage side of the main transformer. The estimated bus voltage on the high-voltage and low-voltage sides of the main transformer is calculated based on the electrical quantity data on the high-voltage side of the main transformer, the reactive voltage sensitivity, and the real-time transformation ratio of the main transformer. Finally, the voltage change of the phase-shifting machine end is converted by each transformer, and the superposition method of the voltage change of the phase-shifting machine end is determined by combining the upper and lower limits of the phase-shifting machine end voltage and the adjustment step size. The phase-shifting machine end voltage closed-loop mode is used to connect the phase-shifting machine end voltage to the station AVC system for regulation, which can ensure the voltage source characteristics of the phase-shifting machine at all time scales while effectively suppressing reactive shunts and ensuring the regulation efficiency of AVC, providing a solution for giving full play to the voltage support and regulation role of distributed phase-shifting machines in new energy stations. Phase-shifting machines can not only give full play to the characteristics of "voltage source", but also coordinate with other reactive equipment. In view of the problems in the prior art that the reactive circulating current caused by voltage control reduces the efficiency of AVC on the one hand, and the fixed reactive power control restricts the voltage source characteristics of the phase-shifting machine on the other hand, affecting its reactive voltage support capacity. This solution can not only realize the constant voltage operation of the phase-shifting machine, but also consider the coordination with AVC, solving the above two problems. In addition, this solution uses the topological parameters of the new energy station and the real-time collected electrical quantities to perform power flow calculations, which can directly obtain the change in the voltage at the machine end of the phase-shifting machine when any reactive device responds to the AVC reactive command, thereby directly compensating for the change, and realizing the reactive current shunt suppression and self-reactive regulation of the phase-shifting machine. The method of obtaining the change in the machine end voltage in this solution has a better theoretical basis. When the system structure and operating status change, this solution can take into account the topological structure of the new energy station and the real-time parameters of the electrical quantities, which has a wider applicability and a smaller adjustment error.

[0086] The details are described through the following embodiments.

[0087] In order to effectively suppress reactive power shunting on the phase regulator side on the basis of realizing constant voltage control of the phase regulator, realize reactive power regulation of the phase regulator, and thus ensure the regulation efficiency of AVC, this embodiment provides a reactive power regulation method of a phase regulator in a new energy field station, the reactive power regulation device of the phase regulator in the new energy field station including but not limited to a server, such as Figure 1 As shown, the method specifically includes the following contents:

[0088] Step 100: Collect reactive power instructions corresponding to a plurality of devices in a target new energy station, wherein the plurality of devices include: a new energy cluster, a static VAR generator and a phase regulator.

[0089] Specifically, the AVC substation can receive the voltage control target of the main transformer high-voltage side bus sent by the AVC master station, and determine the reactive power instructions of each of the devices according to the voltage control target and the preset allocation strategy, and the preset allocation strategy can be a priority or reactive power margin priority strategy. The reactive power instructions of each of the devices can be collected from the AVC substation. The phase regulator can be a distributed phase regulator.

[0090] Specifically, Figure 2 As shown, the new energy station may include: a new energy cluster 1, a static VAR generator 3, a phase regulator 2, a main transformer T2, a boost transformer T1, a main transformer high voltage side bus 5 and a main transformer low voltage side bus 6; the main transformer high voltage side is connected to the main transformer high voltage side bus, the main transformer low voltage side is connected to the new energy cluster, the static VAR generator and the boost transformer high voltage side via the main transformer low voltage side bus, and the boost transformer low voltage side is connected to the phase regulator. The main transformer high voltage side bus can be used to connect to the infinite system 4. The target new energy station may be a wind farm, and the new energy cluster may be a wind turbine cluster.

[0091] Step 200: Obtain the main transformer electrical quantity data, step-up transformer electrical quantity data and current reactive power of each of the devices of the target new energy station.

[0092] Specifically, the main transformer electrical quantity data may include: reactive power on the low voltage side of the main transformer, active power on the low voltage side of the main transformer, and reactive power on the high voltage side of the main transformer; the boost transformer electrical quantity data includes: reactive power on the high voltage side of the boost transformer and reactive power on the low voltage side of the boost transformer.

[0093] Step 300: Determine the terminal voltage change of the phase modulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device; and complete reactive power regulation of the phase modulator according to the terminal voltage change.

[0094] Specifically, the machine-end voltage variation may represent the machine-end voltage variation of the phase modulator caused by reactive power changes of the phase modulator, the new energy cluster and the static VAR generator.

[0095] Furthermore, before completing the reactive power regulation of the phase regulator according to the voltage change at the machine end, it can also be determined whether the voltage regulation direction of the busbar on the high-voltage side of the main transformer is consistent with the zeroing direction of the static VAR generator. If so, the reactive power of the static VAR generator is adjusted to zero; the reactive power of the new energy unit is adjusted to its corresponding reactive power instruction to complete the reactive power regulation of the new energy unit; the reactive power of the static VAR generator is adjusted to its corresponding reactive power instruction to complete the reactive power regulation of the static VAR generator.

[0096] From the above description, it can be seen that the reactive power regulation method of the phase regulator in the new energy station provided in this embodiment can effectively suppress the reactive power diversion on the phase regulator side on the basis of realizing the constant voltage control of the phase regulator, realize the reactive power regulation of the phase regulator, and further ensure the regulation efficiency of AVC; when the new energy cluster and the static reactive power generator adjust the reactive power, the phase regulator can perform corresponding reactive power compensation through the change of the machine-end voltage, suppress the reactive circulation, and at the same time can normally execute its own reactive power instructions, thereby improving the overall regulation speed of AVC.

[0097] In order to improve the reliability of determining the terminal voltage change of the phase regulator, such as Figure 3 As shown, in one embodiment, the step 300 of determining the terminal voltage change of the phase regulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each of the devices includes:

[0098] Step 301: Obtain an estimated reactive power value on the low-voltage side of the main transformer according to the reactive power command corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power command, the reactive power on the high-voltage side of the boost transformer, the reactive power on the low-voltage side of the boost transformer, the reactive power command of the phase regulator and the reactive power on the low-voltage side of the main transformer.

[0099] Specifically, the installed capacity of the new energy cluster under the main transformer may be obtained before step 301 .

[0100] Step 302: Obtain an estimated reactive power value on the high-voltage side of the main transformer according to the active power on the low-voltage side of the main transformer, the reactive power on the low-voltage side of the main transformer, the reactive power on the high-voltage side of the main transformer, and the estimated reactive power value on the low-voltage side of the main transformer.

[0101] Step 303: Determine the voltage estimate of the main transformer high-voltage side bus according to the estimated reactive power of the main transformer high-voltage side, the reactive power of the main transformer high-voltage side, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage.

[0102] Specifically, the voltage sensitivity and current voltage of the main transformer high-voltage side busbar can be obtained, and the voltage estimation value of the main transformer high-voltage side busbar can be determined according to the main transformer high-voltage side reactive power estimation value, the main transformer high-voltage side reactive power, the voltage sensitivity and current voltage of the main transformer high-voltage side busbar; the voltage estimation value U of the main transformer high-voltage side busbar can be obtained according to the following formula: the :

[0103] U the =U th +ΔU th

[0104] ΔU th =ΔQ th ×K QU220

[0105] ΔQ th =(Q the -Q th )×(-1.0)

[0106] Among them, Q the is the estimated reactive power value on the high voltage side of the main transformer, Q th is the reactive power on the high voltage side of the main transformer, K QU220 is the voltage sensitivity of the main transformer high voltage side bus, U th The current voltage of the busbar on the high-voltage side of the main transformer.

[0107] Step 304: Obtain an estimated value of the machine-end voltage of the phase regulator according to the estimated value of the voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer; determine the machine-end voltage change of the phase regulator according to the estimated value of the machine-end voltage of the phase regulator, the pre-acquired upper and lower limits of the machine-end voltage and the maximum adjustment step.

[0108] Specifically, the pre-acquired upper and lower limits of the machine-end voltage include: the machine-end voltage upper limit and the machine-end voltage upper limit, which can be set in advance according to the actual situation, and the present application does not limit this; the maximum adjustment step can be set in advance according to the actual situation, and the present application does not limit this. Further, the real-time transformation ratio of the main transformer and the real-time transformation ratio of the boost transformer can be obtained before step 304, and the real-time transformation ratio k of the transformer T can be determined specifically according to the following formula:

[0109]

[0110] Among them, P1 is the active power on the high-voltage side of the transformer, Q1 is the reactive power on the high-voltage side of the transformer, U1 is the voltage on the high-voltage side of the transformer without considering the loss, U2 is the voltage on the low-voltage side of the transformer, R is the transformer resistance, X is the transformer reactance, G T is the transformer conductance, B Tis the transformer susceptance, U1′ is the voltage on the high-voltage side of the transformer after losses are taken into account; the transformer T can be a main transformer or a step-up transformer.

[0111] In order to improve the reliability of the reactive power estimation value at the low voltage side of the main transformer, in one embodiment, step 301 includes:

[0112] Step 3011: according to the reactive power instruction of the new energy cluster, the current reactive power and the pre-acquired installed capacity under the main transformer, obtain the reactive power change value of the main transformer low-voltage side corresponding to the reactive power of the new energy cluster.

[0113] Specifically, the change value of the reactive power of the new energy cluster corresponding to the reactive power of the main transformer low-voltage side can represent the reactive power change value of the main transformer low-voltage side caused by the reactive power of the new energy cluster. The change value ΔQ of the reactive power of the new energy cluster corresponding to the reactive power of the main transformer low-voltage side can be determined according to the following formula w :

[0114]

[0115] Among them, Q wref It is the reactive power instruction of the new energy cluster, which can be equivalent to the reactive power setting value of the new energy cluster issued by AVC; Q w is the current reactive power of the new energy cluster, P wT It is the installed capacity of the new energy cluster under the main transformer, which can be equivalent to the total installed capacity of the new energy cluster after conversion by the main transformer capacity.

[0116] Step 3012: According to the current reactive power and reactive power command of the static VAR generator, a change value of the reactive power of the static VAR generator corresponding to the reactive power of the main transformer low voltage side is obtained.

[0117] Specifically, the change value of the reactive power of the main transformer low-voltage side corresponding to the reactive power of the static VAR generator can represent the reactive power change value of the main transformer low-voltage side caused by the static VAR generator adjusting the reactive power. The change value ΔQ of the reactive power of the main transformer low-voltage side corresponding to the reactive power of the static VAR generator adjusting the reactive power can be determined according to the following formula s :

[0118] ΔQ s =Q sref -Q s

[0119] Among them, Q sref is the reactive power instruction of the static VAR generator, which can be equivalent to the reactive power setting value of the static VAR generator issued by AVC; Q s is the current reactive power of the static VAR generator.

[0120] Step 3013: According to the reactive power instruction of the phase regulator, the reactive power on the high voltage side of the boost transformer and the reactive power on the low voltage side of the boost transformer, the change value of the reactive power adjusted by the phase regulator corresponding to the reactive power on the low voltage side of the main transformer is obtained.

[0121] Specifically, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power of the phase regulator can represent the change value of the reactive power on the low-voltage side of the main transformer caused by the phase regulator adjusting the reactive power. The change value ΔQ of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power of the phase regulator adjusting the reactive power can be determined according to the following formula g :

[0122] ΔQ g =(Q gthe -Q gth )×(-1.0)

[0123] Q gthe =(Q gref -Q gloss )×(-1.0)

[0124] Q gloss =Q gth +Q gtl

[0125] Among them, Q gth The high voltage side of the boost converter is reactive, Q gtl The step-up to low voltage side reactive power, Q gref It is the reactive power instruction of the phase regulator, which can be equivalent to the reactive power setting value of the phase regulator issued by AVC.

[0126] Step 3014: Obtain an estimated value of the reactive power on the low-voltage side of the main transformer according to the reactive power on the low-voltage side of the main transformer, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the new energy cluster, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the static reactive generator, and the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the phase regulator.

[0127] Specifically, the estimated reactive power value Q on the low-voltage side of the main transformer can be obtained according to the following formula: tle :

[0128] Q tle =Q tl +ΔQ tl

[0129] ΔQ tl =ΔQ w +ΔQ s +ΔQ g

[0130] Among them, Q tl The reactive power on the low voltage side of the main transformer, ΔQ w The reactive power of the new energy cluster corresponds to the reactive power change value of the low-voltage side of the main transformer, ΔQ sThe static reactive generator adjusts the reactive power corresponding to the change in reactive power on the low-voltage side of the main transformer, ΔQ g The reactive power of the phase regulator is adjusted to correspond to the change in reactive power on the low-voltage side of the main transformer.

[0131] In order to improve the reliability of the reactive power estimation value on the high-voltage side of the main transformer, in one embodiment, step 302 includes:

[0132] Step 3021: Obtain an estimated value of reactive power loss on the high-voltage side of the main transformer according to the active power on the low-voltage side of the main transformer, the reactive power on the low-voltage side of the main transformer, the reactive power on the high-voltage side of the main transformer, and the estimated value of reactive power on the low-voltage side of the main transformer.

[0133] Specifically, the estimated reactive power loss Q on the high-voltage side of the main transformer can be obtained according to the following formula: tlosse :

[0134]

[0135] Q tloss =Q th +Q tl

[0136] Among them, Q th is the reactive power on the high voltage side of the main transformer, Q tl The reactive power on the low voltage side of the main transformer, P tl The active power on the low voltage side of the main transformer, Q tle Estimated reactive power value on the low-voltage side of the main transformer.

[0137] Step 3022: Obtain an estimated reactive power value on the high-voltage side of the main transformer according to the estimated reactive power loss value on the high-voltage side of the main transformer and the reactive power value on the low-voltage side of the main transformer.

[0138] Specifically, the estimated reactive power value Q on the high-voltage side of the main transformer can be obtained according to the following formula: the :

[0139] Q the =(Q tl -Q tlosse )×(-1.0)

[0140] Among them, P tl The active power on the low voltage side of the main transformer, Q tlosse Estimated reactive power loss on the high-voltage side of the main transformer.

[0141] In order to ensure the reliability of the estimated value of the terminal voltage of the phase regulator, in one embodiment, the step 304 of obtaining the estimated value of the terminal voltage of the phase regulator according to the estimated value of the voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer includes:

[0142] Step 3041: Determine an estimated voltage value of the busbar on the low-voltage side of the main transformer according to the estimated voltage value of the busbar on the high-voltage side of the main transformer and the pre-acquired real-time transformation ratio of the main transformer.

[0143] Specifically, the estimated voltage value U of the low-voltage side busbar of the main transformer can be determined according to the following formula: tle :

[0144]

[0145] Among them, U the is the estimated voltage of the busbar on the high-voltage side of the main transformer, k t Real-time ratio of the main variable.

[0146] Step 3042: According to the estimated voltage value of the low-voltage side bus of the main transformer and the pre-acquired real-time transformation ratio of the boost transformer, determine the estimated voltage value of the low-voltage side bus of the boost transformer as the estimated terminal voltage value of the phase regulator.

[0147] Specifically, the estimated terminal voltage U of the phase regulator can be determined according to the following formula: ge :

[0148] U ge =U gtle

[0149]

[0150] Among them, U tle is the estimated voltage of the busbar on the low-voltage side of the main transformer, k gt is the real-time ratio of the step-up transformer, U gtle It is the estimated voltage of the busbar on the low voltage side of the step-up transformer.

[0151] In order to improve the reliability of the terminal voltage variation of the phase regulator, in one embodiment, the step 304 of determining the terminal voltage variation of the phase regulator according to the estimated terminal voltage of the phase regulator, the pre-acquired upper and lower limits of the terminal voltage and the maximum adjustment step size includes:

[0152] Step 3043: Determine the initial generator terminal voltage setting value of the phase modulator according to the estimated value of the generator terminal voltage of the phase modulator and the pre-acquired upper and lower limits of the generator terminal voltage.

[0153] Specifically, if the estimated value of the machine-end voltage is greater than the upper limit of the machine-end voltage, the initial machine-end voltage setting value of the phase regulator is determined to be the upper limit of the machine-end voltage; if the estimated value of the machine-end voltage is less than the lower limit of the machine-end voltage, the initial machine-end voltage setting value of the phase regulator is determined to be the lower limit of the machine-end voltage; if the estimated value of the machine-end voltage is greater than or equal to the lower limit of the machine-end voltage and less than or equal to the upper limit of the machine-end voltage, the initial machine-end voltage setting value is determined to be the estimated value of the machine-end voltage of the phase regulator.

[0154] Step 3044: Collect the current terminal voltage of the phase modulator, and determine the terminal voltage setting value of the phase modulator according to the maximum adjustment step, the initial terminal voltage setting value and the current terminal voltage.

[0155] Specifically, the terminal voltage setting value U can be determined according to the following formula: gref1 :

[0156] When|U gref -U g |>U gstep hour, When|U gref -U g |≤U gstep When U gref1 =U gref Among them, U gref is the initial terminal voltage setting value, U g is the current terminal voltage, U gstep is the maximum adjustment step length.

[0157] Step 3045: Determine the change in the generator terminal voltage of the phase modulator according to the current generator terminal voltage and the generator terminal voltage setting value.

[0158] Specifically, the terminal voltage change ΔU can be calculated according to the following formula: g :

[0159] ΔU g =U gref1 -U g

[0160] Among them, U gref1 is the terminal voltage setting value, U g is the current terminal voltage.

[0161] In order to improve the reliability of the voltage sensitivity of the busbar on the high-voltage side of the main transformer, in one embodiment, before step 303, the following steps are further included:

[0162] Step 001: When a new energy cluster or a static VAR generator in the target new energy station emits or absorbs reactive power alone, a voltage change and a reactive power change of a main transformer high-voltage side bus are obtained.

[0163] Step 002: Obtain the voltage sensitivity of the main transformer high-voltage side bus according to the voltage change and reactive power change of the main transformer high-voltage side bus.

[0164] Specifically, the AVC substation switches to manual mode, controls the fan / SVG to generate or absorb a certain amount of reactive power, and records the voltage change ΔU of the main transformer high-voltage side busbar. 220 and reactive power change ΔQ220 The voltage sensitivity K of the main transformer high-voltage side bus can be calculated by the following formula: QU220 :

[0165] K QU220 =ΔU 220 / ΔQ 220

[0166] According to the on-site conditions, the voltage sensitivity of the N-th main transformer high-voltage side busbar KQU2201, KQU2202...KQU220N can be calculated, and the final voltage sensitivity of the main transformer high-voltage side busbar can be obtained by averaging.

[0167] In order to avoid the problem of reactive circulating current between various devices in the new energy station, while ensuring that the phase regulator can exert the voltage source characteristics, the reliability of reactive regulation of the phase regulator is improved. In one embodiment, the reactive regulation of the phase regulator according to the change in the terminal voltage in step 300 includes:

[0168] Step 305: superimposing the machine-end voltage variation to the machine-end voltage control loop to complete reactive power regulation of the phase regulator.

[0169] Specifically, the excitation voltage of the phase regulator can be obtained according to the machine-end voltage variation, the machine-end voltage set value of the phase regulator excitation device, the machine-end voltage measurement value and the excitation main loop control parameter; and the reactive power regulation of the phase regulator can be completed according to the excitation voltage of the phase regulator; Figure 4 This is a schematic diagram of an example in which the machine-end voltage variation is superimposed on the machine-end voltage control loop. Figure 4 The dashed box 7 in the figure represents the terminal voltage control loop, U ref is the given value of the terminal voltage of the phase condenser excitation device, U t is the measured value of the terminal voltage, ΔU g is the change of terminal voltage, PID is the excitation main loop control parameter, E f is the excitation voltage, and the measured value of the terminal voltage can be equivalent to the current terminal voltage U g .

[0170] To further illustrate the present solution, the present application provides an application example of a reactive power regulation method for a phase regulator in a new energy station. In this application example, the new energy cluster is a wind turbine cluster. The AVC substation calculates the phase regulator machine-end voltage change caused by reactive power changes in the phase regulator and other equipment, and superimposes it on the machine-end voltage control loop to achieve reactive power regulation of the phase regulator itself and reactive current shunt suppression in the station. It can correctly execute the regulation instructions issued by the AVC while ensuring that the phase regulator exerts its voltage source characteristics, and does not cause reactive circulation problems between the equipment in the station. It can ensure the regulation efficiency of the AVC and improve the voltage stability level of the new energy station. Figure 5 The method is described in detail as follows:

[0171] Step 11: The AVC substation measures the reactive voltage sensitivity on the high-voltage side of the station main transformer. That is, the AVC substation switches to manual mode, controls the fan / SVG to emit or absorb a certain amount of reactive power, and records the bus voltage change ΔU on the high-voltage side of the station main transformer. 220 and reactive power change ΔQ 220 , can be obtained by formula K QU220 =ΔU 220 / ΔQ 220 Calculate the 220kV bus voltage sensitivity K QU220 .

[0172] According to the on-site conditions, calculate the N-times 220kV bus voltage sensitivity K QU2201 , K QU2202 ...K QU220N , and then average to get the final K QU220 .

[0173] Step 12: The AVC substation allocates reactive power commands to the wind turbine, SVG, and phase regulator according to the main transformer high-voltage side bus voltage control target issued by the AVC master station. That is, the AVC substation allocates reactive power commands to the wind turbine, SVG, and phase regulator according to the main transformer high-voltage side bus voltage control target issued by the AVC master station, combined with the 220kV bus voltage sensitivity K QU220 Calculate the required reactive power change, and then assign reactive power commands to wind turbines, SVGs, and phase regulators according to a certain strategy (priority or reactive power margin priority). Among them, wind turbines and SVGs are reactive power closed-loop controlled, and can be adjusted directly according to the command. The following steps will analyze how the phase regulator of voltage closed-loop control responds to AVC commands in the whole process while avoiding reactive power diversion caused by other devices adjusting reactive power.

[0174] Among them, the priority strategy is to adjust the reactive power of wind turbines, SVG, and phase regulators in sequence according to the set priority; the reactive margin priority is as follows. Taking the SVG reactive margin priority as an example, when the 220kV bus voltage adjustment direction is consistent with the SVG reactive zeroing direction, the SVG reactive power will be adjusted to zero first, and then adjusted according to the set priority.

[0175] Step 13: The AVC substation collects the active power, reactive power, bus voltage and other electrical quantity data of the main transformer and the phase-shifting step-up transformer of the new energy station, and calculates the real-time transformation ratio of each transformer by combining the nameplate parameters of each transformer and the equivalent model. The nameplate parameters of the transformer include: the resistance, reactance, conductance and susceptance of the transformer. The real-time transformation ratio of the transformer is the actual transformation ratio after considering the transformer loss under the current working conditions. The calculation model is as follows: Figure 6 As shown,

[0176] P1 is the active power on the high voltage side, Q1 is the reactive power on the high voltage side, U1 is the voltage on the high voltage side without considering the loss, U2 is the voltage on the low voltage side, R is the resistance, X is the reactance, G T is the conductivity, B T is the susceptance, U1′ is the voltage on the high voltage side after losses are taken into account, and k is the real-time transformation ratio of the transformer.

[0177] Step 14: Through the reactive power instructions and current values ​​of the fans, SVGs, and phase regulators, combined with the active and reactive power data of the high and low voltage sides of each transformer, the reactive power adjustment of each device corresponds to the reactive power change of the low voltage side of the main transformer. That is, through the reactive power instructions and current values ​​of the fans, SVGs, and phase regulators, combined with the real-time transformation ratio of each transformer and the reactive power voltage sensitivity of the high voltage side of the main transformer, the reactive power adjustment of each device corresponds to the reactive power change of the low voltage side of the main transformer, and the reactive power estimation value of the low voltage side of the main transformer is calculated. The specific calculation method is as follows.

[0178] (1) Changes in reactive power of wind turbine cluster corresponding to the reactive power of the main transformer low voltage side

[0179] It can be estimated that the change in reactive power on the low-voltage side of the main transformer corresponding to the regulation of the wind turbine cluster is:

[0180]

[0181] Among them, Q w is the current reactive power of the wind turbine cluster, Q wref is the reactive power setting value issued by AVC, P wT is the installed capacity of the wind turbine cluster under the main transformer, and the current reactive power of the wind turbine cluster can represent the reactive power of the wind turbine cluster before reactive power regulation.

[0182] (2) The reactive power of SVG equipment corresponds to the change of reactive power on the low voltage side of the main transformer

[0183] It can be estimated that the change in reactive power on the low-voltage side of the main transformer corresponding to the regulation of the SVG equipment is:

[0184] ΔQ s =Q sref -Q s

[0185] Among them, Q s is the current reactive power of the SVG device, Q sref The current reactive power of the SVG device can represent the reactive power before the static VAR generator is adjusted, which is the calculated reactive power setpoint.

[0186] (3) The reactive power of the phase regulator corresponds to the change of reactive power on the low voltage side of the main transformer

[0187] Q g is the current reactive power of the phase regulator, Q grefThe reactive power setting value calculated for the AVC substation. The phase regulator is connected to the low-voltage side of the main transformer through the step-up transformer. The reactive power Q on the high-voltage side of the step-up transformer needs to be collected. gth , low voltage side reactive power Q gtl , then the loss value can be obtained as Q gloss =Q gth +Q gtl The estimated reactive power on the high-voltage side of the phase-shifting step-up transformer is Q gthe =(Q gref -Q gloss )×(-1.0), the corresponding reactive power change on the low-voltage side of the main transformer is:

[0188] ΔQ g =(Q gthe -Q gth )×(-1.0)

[0189] (4) The total reactive power change on the low-voltage side of the main transformer when all devices are regulating reactive power

[0190] The reactive power on the low voltage side of the main transformer is recorded as Q tl , the merit is recorded as P tl , the estimated reactive power on the low voltage side is recorded as Q tle From (1)-(3), we can get the reactive power change value of the low-voltage side of the main transformer as follows:

[0191] ΔQ tl =ΔQ w +ΔQ s +ΔQ g

[0192] Then the estimated reactive power value of the low voltage side of the main transformer is:

[0193] Q tle =Q tl +ΔQ tl

[0194] Step 15: Calculate the estimated active and reactive power values ​​on the high-voltage side of the main transformer according to the electrical quantity data on the high-voltage side of the main transformer, and then calculate the estimated bus voltage values ​​on the high-voltage and low-voltage sides of the main transformer according to the reactive voltage sensitivity and real-time transformation ratio on the high-voltage side of the main transformer.

[0195] (1) Estimation of active and reactive power values ​​on the high voltage side of the main transformer

[0196] The active power on the high voltage side of the main transformer is recorded as P th , the reactive power is recorded as Q th , the estimated active power on the high voltage side is recorded as P the , the estimated reactive power is recorded as Q the The above values ​​are normalized. The current reactive power loss of the main transformer is Q tloss =Q th +Q tl, the active power loss is P tloss =P th +P tl , the estimated active power loss of all equipment after reactive power adjustment is:

[0197]

[0198] The reactive power loss is:

[0199]

[0200] Then the estimated active power on the high-voltage side of the main transformer can be obtained as P the =(P tl -P tlosse )×(-1.0), the reactive power estimation value is Q the =(Q tl -Q tlosse )×(-1.0)

[0202] (2) Estimation of bus voltage value on the high-voltage side of the main transformer

[0203] The total reactive power change of the busbar on the high voltage side of the main transformer is ΔQ th =(Q the -Q th )×(-1.0). From step 11, the sensitivity of bus reactive power injection to voltage is K QU220 , then the voltage change of the main transformer high voltage side bus is ΔU th =ΔQ th ×K QU220 . Assume that the current value of bus voltage is U th , we can get the estimated voltage of the main transformer high voltage side busbar as U the =U th +ΔU th .

[0204] (3) Estimation of bus voltage value on the low-voltage side of the main transformer

[0205] According to the calculation method in step 13 and the estimated value of the main transformer electrical quantity, the real-time transformation ratio of the main transformer can be obtained as k t The estimated bus voltage on the low-voltage side of the main transformer is

[0206] Step 16: The voltage change at the machine end of the phase modulator is calculated by converting the real-time transformation ratio of each transformer. The voltage change at the machine end of the phase modulator and the superposition method are confirmed by combining the upper and lower limits of the voltage at the machine end of the phase modulator and the adjustment step size, so as to realize the phase modulator participating in AVC regulation by adopting the closed-loop method of the machine end voltage.

[0207] (1) Estimated voltage at the phase-modulating machine terminal

[0208] For the phase regulator connected to the low-voltage side of the main transformer through the step-up transformer, the estimated reactive power on the high-voltage side of the step-up transformer is Q gthe , the active value is P gthe According to the calculation method in step 13 and the estimated value of the main transformer electrical quantity, the real-time transformation ratio of the step-up transformer can be obtained as k gt The estimated bus voltage on the low voltage side of the step-up transformer is The estimated terminal voltage of the phase regulator is U ge =U gtle

[0210] (2) Calculation of the voltage variation at the machine end of the phase regulator

[0211] When U ge >U ghl When U gref =U ghl ; when U ge <U gll When U gref =U gll ; when U gll ≤U ge ≤U ghl When U gref =U ge .

[0212] When|U gref -U g |>U gstep hour, When|U gref -U g |≤U gstep When U gref1 =U gref Finally, we get ΔU g =U gref1 -U g .

[0213] Among them, U g is the current terminal voltage of the phase regulator, U ge is the estimated terminal voltage of the phase regulator, U ghl is the upper limit of the voltage regulation of the phase regulator, U gll U is the lower limit of the condenser adjustment. gstep is the maximum adjustment step of the phase regulator. gref is the initial value of the terminal voltage setting value, U gref1 is the terminal voltage setting value calculated by AVC, ΔU g It is the change of the voltage at the machine end, that is, the voltage increment value at the machine end.

[0214] (3) Phase Regulator Voltage Command Superposition

[0215] While issuing reactive power commands to wind turbines and SVGs, AVC can also issue the calculated voltage change command at the phase-modulating machine end to the phase-modulating machine excitation system and superimpose it on the voltage main loop to realize the response of AVC command.

[0216] In order to further illustrate this solution, this application provides an example of a reactive power regulation method for a phase regulator in a new energy station, which is specifically described as follows:

[0217] The simulation model is built according to the actual parameters of a certain wind farm: the rated bus voltage of the wind farm system is 230kV; the installed capacity of the wind turbine is 60MW; the rated capacity of the SVG is 25Mvar; the rated capacity of the phase regulator is 10MVar, the rated voltage is 10.5kV; the capacity of the phase regulator transformer is 12.5MVA, the voltage ratio is 37kV / 10.5kV, and the short-circuit impedance is 5.99%; the capacity of the main transformer of the whole field is 75MVA, the voltage ratio is 230kV / 37kV, and the short-circuit impedance is 13.57%. The topology diagram can be as follows Figure 2 shown.

[0218] The AVC system has completed program upgrades and transformations, and has associated wind farm transformers and other equipment and line electrical parameters with the AVC substation system. Wind turbines, SVGs, and phase regulators have been put into operation, with the adjustment priority being wind turbines>SVG>phase regulators. The reactive power adjustment range of wind turbines, SVGs, and phase regulators has been temporarily modified to ±3Mvar, ±4Mvar, and ±10Mvar. A bus voltage command of 230.2→232.7kV is issued, and the reactive power response characteristics of each device are as follows: Figure 7 shown.

[0219] Depend on Figure 7 It can be concluded that after the bus voltage command of 230.2→232.7kV is issued, the reactive power is adjusted according to the priority of the wind turbine, SVG and phase regulator. When the wind turbine and SVG adjust the reactive power, the phase regulator performs corresponding reactive power compensation through voltage increment superposition, which suppresses the reactive circulating current. At the same time, it can execute its own reactive power command normally. The overall adjustment speed of AVC meets the standard requirements.

[0220] From the above description, it can be seen that in this application example, the phase regulator can be connected to the AVC control operation in a machine-side voltage closed-loop mode. The AVC substation calculates the phase regulator machine-side voltage change caused by the reactive power change of the phase regulator and other equipment through the new energy station topology structure and electrical quantity data, and superimposes it on the machine-side voltage control loop to realize the reactive power regulation of the phase regulator itself and the reactive current shunt suppression in the station. While ensuring that the phase regulator can exert its voltage source characteristics, the regulation instructions issued by the AVC are correctly executed without causing reactive circulation problems between the equipment in the station. This can ensure the regulation efficiency of the AVC and improve the voltage stability level of the new energy station.

[0221] From the software level, in order to effectively suppress reactive power shunting on the phase regulator side on the basis of realizing constant voltage control of the phase regulator, realize reactive power regulation of the phase regulator, and thus ensure the regulation efficiency of AVC, the present application provides an embodiment of a reactive power regulation device for a phase regulator in a new energy field station for realizing all or part of the contents of the reactive power regulation method for the phase regulator in the new energy field station, see Figure 8 The reactive power regulation device of the phase regulator of the new energy station specifically includes the following contents:

[0222] The acquisition module 01 is used to acquire reactive power instructions corresponding to multiple devices in the target new energy station, wherein the multiple devices include: a new energy cluster, a static reactive power generator and a phase regulator;

[0223] Acquisition module 02, used to acquire the main transformer electrical quantity data, boost transformer electrical quantity data and current reactive power of each of the devices of the target new energy station;

[0224] The reactive power regulation module 03 is used to determine the terminal voltage change of the phase modulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device; and complete the reactive power regulation of the phase modulator according to the terminal voltage change.

[0225] In one embodiment, the main transformer electrical quantity data includes: the reactive power on the low voltage side of the main transformer, the active power on the low voltage side of the main transformer and the reactive power on the high voltage side of the main transformer; the boost transformer electrical quantity data includes: the reactive power on the high voltage side of the boost transformer and the reactive power on the low voltage side of the boost transformer.

[0226] In one embodiment, the reactive power regulation module includes:

[0227] The first reactive power estimation unit is used to obtain the reactive power estimation value of the low-voltage side of the main transformer according to the reactive power command corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power command, the reactive power of the high-voltage side of the boost transformer, the reactive power of the low-voltage side of the boost transformer, the reactive power command of the phase regulator and the reactive power of the low-voltage side of the main transformer;

[0228] A second reactive power estimation unit is used to obtain a reactive power estimation value of the main transformer high-voltage side according to the active power of the main transformer low-voltage side, the reactive power of the main transformer low-voltage side, the reactive power of the main transformer high-voltage side and the reactive power estimation value of the main transformer low-voltage side;

[0229] A first determining unit is used to determine an estimated voltage value of the main transformer high-voltage side bus according to the estimated reactive power value on the main transformer high-voltage side, the reactive power on the main transformer high-voltage side, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage;

[0230] The second determination unit is used to obtain the estimated value of the machine-end voltage of the phase modulator according to the estimated value of the voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer; and determine the machine-end voltage change of the phase modulator according to the estimated value of the machine-end voltage of the phase modulator, the pre-acquired upper and lower limits of the machine-end voltage and the maximum adjustment step.

[0231] In one embodiment, the first reactive power estimation unit is configured to perform:

[0232] According to the reactive power instruction of the new energy cluster, the current reactive power and the pre-acquired installed capacity under the main transformer, the reactive power change value of the new energy cluster regulating the reactive power corresponding to the low-voltage side reactive power of the main transformer is obtained;

[0233] According to the current reactive power and reactive power command of the static VAR generator, a change value of the reactive power of the static VAR generator corresponding to the reactive power of the main transformer low voltage side is obtained;

[0234] According to the reactive power instruction of the phase regulator, the reactive power on the high-voltage side of the boost transformer and the reactive power on the low-voltage side of the boost transformer, a change value of the reactive power adjusted by the phase regulator corresponding to the reactive power on the low-voltage side of the main transformer is obtained;

[0235] According to the reactive power on the low-voltage side of the main transformer, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the new energy cluster, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the static VAR generator, and the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the phase regulator, an estimated value of the reactive power on the low-voltage side of the main transformer is obtained.

[0236] In one embodiment, the second reactive power estimation unit is configured to perform:

[0237] Obtain an estimated value of reactive power loss on the high-voltage side of the main transformer according to the active power on the low-voltage side of the main transformer, the reactive power on the low-voltage side of the main transformer, the reactive power on the high-voltage side of the main transformer, and the estimated value of reactive power on the low-voltage side of the main transformer;

[0238] The estimated reactive power value on the high-voltage side of the main transformer is obtained according to the estimated reactive power loss value on the high-voltage side of the main transformer and the reactive power on the low-voltage side of the main transformer.

[0239] In one embodiment, the second determining unit is configured to perform:

[0240] Determine an estimated voltage value of the main transformer low-voltage side busbar according to an estimated voltage value of the main transformer high-voltage side busbar and a pre-acquired real-time transformation ratio of the main transformer;

[0241] According to the estimated voltage value of the low-voltage side busbar of the main transformer and the pre-acquired real-time transformation ratio of the boost transformer, the estimated voltage value of the low-voltage side busbar of the boost transformer is determined as the estimated terminal voltage value of the phase regulator.

[0242] In one embodiment, the second determining unit is configured to perform:

[0243] Determining an initial terminal voltage setting value of the phase modulator according to the estimated terminal voltage of the phase modulator and the pre-acquired upper and lower limits of the terminal voltage;

[0244] Collecting the current terminal voltage of the phase regulator, and determining the terminal voltage setting value of the phase regulator according to the maximum adjustment step, the initial terminal voltage setting value and the current terminal voltage;

[0245] The change in the machine terminal voltage of the phase modulator is determined according to the current machine terminal voltage and the machine terminal voltage setting value.

[0246] In one embodiment, the reactive power regulation device of the phase regulator of the new energy station further includes:

[0247] A variation acquisition module is used to acquire the voltage variation and reactive power variation of the main transformer high-voltage side bus when the new energy cluster or static reactive generator in the target new energy station emits or absorbs reactive power alone;

[0248] The sensitivity determination module is used to obtain the voltage sensitivity of the main transformer high-voltage side bus according to the voltage change and reactive power change of the main transformer high-voltage side bus.

[0249] In one embodiment, the reactive power regulation module includes:

[0250] The superposition unit is used to superimpose the machine-end voltage variation onto the machine-end voltage control loop to complete the reactive power regulation of the phase regulator.

[0251] The embodiment of the reactive power regulation device for the phase regulator of a new energy station provided in this specification can be specifically used to execute the processing flow of the embodiment of the reactive power regulation method for the phase regulator of a new energy station mentioned above. Its functions will not be repeated here, and reference can be made to the detailed description of the embodiment of the reactive power regulation method for the phase regulator of a new energy station mentioned above.

[0252] Fig. 9 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention, such as Fig. 9 As shown, the electronic device includes: a memory 901, a processor 902, and a computer program stored in the memory 901 and executable on the processor 902. When the processor 902 executes the computer program, the following method is implemented:

[0253] Collect reactive power instructions corresponding to a plurality of devices in a target new energy station, wherein the plurality of devices include: a new energy cluster, a static VAR generator and a phase regulator;

[0254] Obtaining the main transformer electrical quantity data, step-up transformer electrical quantity data and current reactive power of each of the devices of the target new energy station;

[0255] According to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device, the terminal voltage change of the phase modulator is determined; according to the terminal voltage change, the reactive power regulation of the phase modulator is completed.

[0256] This embodiment discloses a computer program product, the computer program product including a computer program, and when the computer program is executed by a processor, the following method is implemented:

[0257] Collect reactive power instructions corresponding to a plurality of devices in a target new energy station, wherein the plurality of devices include: a new energy cluster, a static VAR generator and a phase regulator;

[0258] Obtaining the main transformer electrical quantity data, step-up transformer electrical quantity data and current reactive power of each of the devices of the target new energy station;

[0259] According to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device, the terminal voltage change of the phase modulator is determined; according to the terminal voltage change, the reactive power regulation of the phase modulator is completed.

[0260] This embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following method is implemented:

[0261] Collect reactive power instructions corresponding to a plurality of devices in a target new energy station, wherein the plurality of devices include: a new energy cluster, a static VAR generator and a phase regulator;

[0262] Obtaining the main transformer electrical quantity data, step-up transformer electrical quantity data and current reactive power of each of the devices of the target new energy station;

[0263] According to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device, the terminal voltage change of the phase modulator is determined; according to the terminal voltage change, the reactive power regulation of the phase modulator is completed.

[0264] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented 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.

[0265] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0266] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0267] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0268] In the description of this specification, the description with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0269] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reactive power regulation method for a phase regulator in a new energy station, characterized in that: include: Collect reactive power instructions corresponding to a plurality of devices in a target new energy station, wherein the plurality of devices include: a new energy cluster, a static VAR generator and a phase regulator; Obtaining the main transformer electrical quantity data, step-up transformer electrical quantity data and current reactive power of each of the devices of the target new energy station; According to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device, the terminal voltage change of the phase modulator is determined; according to the terminal voltage change, the reactive power regulation of the phase modulator is completed.

2. The reactive power regulation method of the phase regulator of the new energy station according to claim 1 is characterized in that: The main transformer electrical quantity data includes: the reactive power on the low voltage side of the main transformer, the active power on the low voltage side of the main transformer and the reactive power on the high voltage side of the main transformer; the boost transformer electrical quantity data includes: the reactive power on the high voltage side of the boost transformer and the reactive power on the low voltage side of the boost transformer.

3. The reactive power regulation method of the phase regulator of the new energy station according to claim 2 is characterized in that: Determining the terminal voltage change of the phase regulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device includes: According to the reactive power command corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power command, the reactive power on the high-voltage side of the boost transformer, the reactive power on the low-voltage side of the boost transformer, the reactive power command of the phase regulator and the reactive power on the low-voltage side of the main transformer, the reactive power estimation value on the low-voltage side of the main transformer is obtained; Obtaining a reactive power estimate value of the main transformer high-voltage side according to the active power of the main transformer low-voltage side, the reactive power of the main transformer low-voltage side, the reactive power of the main transformer high-voltage side, and the reactive power estimate value of the main transformer low-voltage side; Determine the voltage estimate of the main transformer high-voltage side bus according to the estimated reactive power value on the main transformer high-voltage side, the reactive power on the main transformer high-voltage side, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage; The estimated value of the machine-end voltage of the phase regulator is obtained based on the estimated voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer; the change of the machine-end voltage of the phase regulator is determined based on the estimated value of the machine-end voltage of the phase regulator, the pre-acquired upper and lower limits of the machine-end voltage and the maximum adjustment step.

4. The reactive power regulation method of the phase regulator of the new energy station according to claim 3 is characterized in that: The method of obtaining the reactive power estimation value of the low-voltage side of the main transformer according to the reactive power instruction corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power instruction, the reactive power of the high-voltage side of the boost transformer, the reactive power of the low-voltage side of the boost transformer, the reactive power instruction of the phase regulator and the reactive power of the low-voltage side of the main transformer includes: According to the reactive power instruction of the new energy cluster, the current reactive power and the pre-acquired installed capacity under the main transformer, the reactive power change value of the new energy cluster regulating the reactive power corresponding to the low-voltage side reactive power of the main transformer is obtained; According to the current reactive power and reactive power command of the static VAR generator, a change value of the reactive power of the static VAR generator corresponding to the reactive power of the main transformer low voltage side is obtained; According to the reactive power instruction of the phase regulator, the reactive power on the high-voltage side of the boost transformer and the reactive power on the low-voltage side of the boost transformer, a change value of the reactive power adjusted by the phase regulator corresponding to the reactive power on the low-voltage side of the main transformer is obtained; According to the reactive power on the low-voltage side of the main transformer, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the new energy cluster, the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the static VAR generator, and the change value of the reactive power on the low-voltage side of the main transformer corresponding to the reactive power adjusted by the phase regulator, an estimated value of the reactive power on the low-voltage side of the main transformer is obtained.

5. The reactive power regulation method of the phase regulator of the new energy station according to claim 3 is characterized in that: The step of obtaining a reactive power estimation value of the main transformer high-voltage side according to the active power of the main transformer low-voltage side, the reactive power of the main transformer low-voltage side, the reactive power of the main transformer high-voltage side and the reactive power estimation value of the main transformer low-voltage side comprises: Obtain an estimated value of reactive power loss on the high-voltage side of the main transformer according to the active power on the low-voltage side of the main transformer, the reactive power on the low-voltage side of the main transformer, the reactive power on the high-voltage side of the main transformer, and the estimated value of reactive power on the low-voltage side of the main transformer; The estimated reactive power value on the high-voltage side of the main transformer is obtained according to the estimated reactive power loss value on the high-voltage side of the main transformer and the reactive power on the low-voltage side of the main transformer.

6. The reactive power regulation method of the phase regulator of the new energy station according to claim 3 is characterized in that: The method of obtaining the estimated terminal voltage of the phase regulator according to the estimated voltage of the high-voltage side busbar of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer comprises: Determine an estimated voltage value of the main transformer low-voltage side busbar according to an estimated voltage value of the main transformer high-voltage side busbar and a pre-acquired real-time transformation ratio of the main transformer; According to the estimated voltage value of the low-voltage side bus of the main transformer and the pre-acquired real-time transformation ratio of the boost transformer, the estimated voltage value of the low-voltage side bus of the boost transformer is determined as the estimated terminal voltage value of the phase regulator.

7. The reactive power regulation method of the phase regulator of the new energy station according to claim 3 is characterized in that: The step of determining the amount of change in the terminal voltage of the phase regulator according to the estimated terminal voltage of the phase regulator, the pre-acquired upper and lower limits of the terminal voltage, and the maximum adjustment step length includes: Determining an initial terminal voltage setting value of the phase modulator according to the estimated terminal voltage of the phase modulator and the pre-acquired upper and lower limits of the terminal voltage; Collecting the current terminal voltage of the phase regulator, and determining the terminal voltage setting value of the phase regulator according to the maximum adjustment step, the initial terminal voltage setting value and the current terminal voltage; The change in the machine terminal voltage of the phase modulator is determined according to the current machine terminal voltage and the machine terminal voltage setting value.

8. The reactive power regulation method of the phase regulator of the new energy station according to claim 3 is characterized in that: Before determining the voltage estimate of the main transformer high-voltage side bus according to the estimated reactive power estimate of the main transformer high-voltage side, the reactive power of the main transformer high-voltage side, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage, the method further includes: When the new energy cluster or static reactive generator in the target new energy station emits or absorbs reactive power alone, the voltage change and reactive power change of the busbar on the high-voltage side of the main transformer are obtained; The voltage sensitivity of the main transformer high-voltage side bus is obtained according to the voltage change and reactive power change of the main transformer high-voltage side bus.

9. The reactive power regulation method of the phase regulator of the new energy station according to claim 1 is characterized in that: The method of completing reactive power regulation of the phase regulator according to the terminal voltage variation comprises: The machine-end voltage variation is added to the machine-end voltage control loop to complete the reactive power regulation of the phase regulator.

10. A reactive power regulation device for a phase regulator in a new energy station, characterized in that: include: A collection module, used to collect reactive power instructions corresponding to multiple devices in a target new energy station, wherein the multiple devices include: a new energy cluster, a static reactive power generator and a phase regulator; An acquisition module, used to acquire the main transformer electrical quantity data, boost transformer electrical quantity data and current reactive power of each of the devices of the target new energy site; The reactive power regulation module is used to determine the terminal voltage change of the phase regulator according to the main transformer electrical quantity data, the step-up transformer electrical quantity data, the current reactive power and reactive power instructions of each device; and complete the reactive power regulation of the phase regulator according to the terminal voltage change.

11. The reactive power regulation device for phase regulators in new energy stations according to claim 10, characterized in that: The main transformer electrical quantity data includes: the reactive power on the low voltage side of the main transformer, the active power on the low voltage side of the main transformer and the reactive power on the high voltage side of the main transformer; the boost transformer electrical quantity data includes: the reactive power on the high voltage side of the boost transformer and the reactive power on the low voltage side of the boost transformer.

12. The reactive power regulation device for phase regulators in new energy stations according to claim 11, characterized in that: The reactive power regulation module comprises: The first reactive power estimation unit is used to obtain the reactive power estimation value of the low-voltage side of the main transformer according to the reactive power command corresponding to the new energy cluster, the current reactive power, the pre-acquired installed capacity under the main transformer, the current reactive power of the static reactive generator, the reactive power command, the reactive power of the high-voltage side of the boost transformer, the reactive power of the low-voltage side of the boost transformer, the reactive power command of the phase regulator and the reactive power of the low-voltage side of the main transformer; A second reactive power estimation unit is used to obtain a reactive power estimation value of the main transformer high-voltage side according to the active power of the main transformer low-voltage side, the reactive power of the main transformer low-voltage side, the reactive power of the main transformer high-voltage side and the reactive power estimation value of the main transformer low-voltage side; A first determining unit is used to determine an estimated voltage value of the main transformer high-voltage side bus according to the estimated reactive power value on the main transformer high-voltage side, the reactive power on the main transformer high-voltage side, the pre-acquired voltage sensitivity of the main transformer high-voltage side bus and the current voltage; The second determination unit is used to obtain the estimated value of the machine-end voltage of the phase modulator according to the estimated value of the voltage of the high-voltage side bus of the main transformer, the pre-acquired real-time transformation ratio of the main transformer and the real-time transformation ratio of the step-up transformer; and determine the machine-end voltage change of the phase modulator according to the estimated value of the machine-end voltage of the phase modulator, the pre-acquired upper and lower limits of the machine-end voltage and the maximum adjustment step.

13. 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, the reactive power regulation method of the phase regulator in the new energy station is implemented as described in any one of claims 1 to 9.

14. A computer-readable storage medium having computer instructions stored thereon, characterized in that: When the instruction is executed by the processor, the reactive power regulation method of the phase regulator of the new energy station described in any one of claims 1 to 9 is implemented.

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