Dispatching automation master station avc reactive power optimization control method and system for new energy access

Abstract

The application provides a dispatching automation master station AVC reactive power optimization control method and system for new energy access, relates to the technical field of new energy dispatching, and comprises the following steps: determining a target object and a target reactive power regulation amount, generating an expected electrical change direction and an allowed execution time window based on the target reactive power regulation amount, and constructing an AVC instruction state record; generating an actual electrical change direction, calculating a direction consistency degree and generating a repeated regulation risk coefficient, and generating an instruction risk constraint; obtaining a basic target reactive power regulation amount according to a preset AVC voltage reactive power control logic, calculating a constrained target reactive power regulation amount, generating a constrained AVC control instruction based on the target reactive power regulation amount; calculating an electrical response consistency degree of the constrained AVC control instruction, and generating a closed-loop optimization control result. Through the system, the safety, continuity and reactive power resource utilization efficiency of the AVC closed-loop reactive power optimization control in the new energy large-scale access scenario can be improved.

Description

Technical Field

[0001] This invention relates to the field of new energy dispatching technology, and more particularly to a reactive power optimization control method and system for a dispatching automation master station (AVC) for new energy access. Background Technology

[0002] With the continuous increase in the installed capacity of new energy sources such as wind power and photovoltaics, and after new energy power plants are connected to the grid through centralized collection lines, step-up substations, and high-proportion power electronic converters, the voltage and reactive power control objects and processes faced by the dispatch automation master station (AVC) have become more complex. The output of new energy sources is affected by wind speed, irradiance, cloud cover, power limiting strategies, and changes in short-circuit capacity at the grid connection point, exhibiting significant randomness and volatility. This can easily cause rapid voltage deviations at the grid connection point, frequent changes in the power flow direction of local lines, and repeated switching of the regional reactive power balance state. At the same time, target objects such as new energy inverters, SVG, SVC, capacitor reactors, and on-load tap-changing transformers all possess varying degrees of voltage and reactive power regulation capabilities, but their response speed, regulation margin, operating costs, and the direction of their impact on the grid connection point voltage are not consistent. Existing dispatch automation master stations (AVCs) typically generate reactive power control commands based on the voltage of new energy grid connection points, reactive power output of target objects, reactive power margin of target objects, and power flow status of relevant lines. These commands are then sent to new energy power station AVC substations, inverter group controllers, reactive power compensation device control units, or transformer tap changer control devices via the dispatch data network or the power station AVC communication interface to achieve voltage compliance and regional reactive power coordination at new energy power stations.

[0003] However, the control logic of existing master station AVCs typically treats control commands as one-time messages, focusing primarily on the current measurement status and the generation of current control quantities. It lacks continuous characterization of the effective time boundaries of issued commands, the expected direction of electrical changes, and the potential impact of old commands in the next control cycle. In actual engineering operations, communication links may be affected by factors such as network congestion, channel switching, message delays, packet loss, out-of-order delivery, duplicate uploads, inconsistent timestamps, and abnormal responses from the site-side interface, causing timing discrepancies between the measurement status, command issuance status, and execution receipt status seen by the master station. When the reactive power regulation command issued in the previous cycle has not yet formed a stable closed loop, if the master station continues to issue commands in the same direction to the same target object or the same voltage control area based solely on the current grid connection point voltage deviation, the old command, once it takes effect late, may overlap with the new command, causing over-adjustment of the grid connection point voltage, reverse reactive power flow, or repeated equipment operation. If the master station judges the control as complete based solely on the execution receipt, but the actual changes in the grid connection point voltage, reactive power output of the target object, and line power flow do not develop in the expected direction, it may lead to the master station misjudging that the voltage support has been in place, resulting in insufficient subsequent regulation. Existing communication security or anomaly detection measures mostly focus on communication message integrity, link availability, or measurement over-limit alarms, which are difficult to directly translate into control boundaries in AVC reactive power optimization. They also cannot answer engineering questions such as whether a certain issued AVC command is still in an effective stage in the current control cycle, whether it has shown the expected impact on electrical quantities, and whether the next round of regulation for the same target object should be limited or restored to normal.

[0004] Therefore, existing master station AVC technology still suffers from problems such as loss of electrical semantics of old instructions under uncertain communication conditions, difficulty in carrying out the potential effects of old instructions into the next round of optimization, high risk of repeated adjustment in the same direction under disturbance conditions, and insufficient closed-loop handling when the execution feedback is inconsistent with the actual electrical response. It is difficult to fully meet the requirements of voltage safety, reactive power utilization efficiency and closed-loop control reliability after a high proportion of new energy access. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a reactive power optimization control method and system for a dispatch automation master station (AVC) oriented towards new energy access.

[0006] To achieve the above objectives, this invention proposes a reactive power optimization control method for a dispatch automation master station (AVC) oriented towards new energy access, comprising: At the start of the AVC control cycle, the operating quantity data related to the current reactive power control is read. The target object is determined based on the comparison result between the operating quantity data and the AVC target voltage range. The target reactive power adjustment amount is determined based on the adjustment amount required for the current voltage deviation and the available reactive power margin of the target object. The expected electrical change direction is generated based on the target reactive power adjustment amount. The allowed execution time window of the AVC command is determined based on the type of the target object and the AVC control cycle. The AVC command status record is constructed based on the operating quantity data, the target reactive power adjustment amount, the expected electrical change direction, and the allowed execution time window. The AVC instruction status record is read, and the actual electrical change direction is generated within the current AVC control cycle. The direction consistency between the actual electrical change direction and the expected electrical change direction is calculated. Based on the direction consistency, combined with the time validity status of the old instruction and the available reactive power margin of the target object, a repeated adjustment risk coefficient is generated. The master station generates instruction risk constraints based on the repeated adjustment risk coefficient. Read the instruction risk constraint, and within the current AVC control cycle, obtain the basic target reactive power adjustment amount according to the preset AVC voltage reactive power control logic. Calculate the constrained target reactive power adjustment amount based on the basic target reactive power adjustment amount and the repeated adjustment risk coefficient, and generate a constrained AVC control instruction based on the constrained target reactive power adjustment amount. Calculate the electrical response consistency of the constrained AVC control command, and generate closed-loop optimized control results based on the electrical response consistency, the current voltage state of the new energy grid connection point, and the current reactive power margin of the target object.

[0007] In some embodiments, after obtaining the basic target reactive power regulation amount according to the preset AVC voltage reactive power control logic, the method further includes determining the current control strategy based on the constraint type. Specifically, determining the current control strategy based on the constraint type includes: When the constraint type is a repetitive adjustment constraint in the same direction, and the consistency between the current actual electrical change and the expected electrical change of the old instruction is greater than the threshold, the reactive power adjustment in the same direction is restricted from being issued to the same target object to suppress the superposition of new and old instructions. When the constraint type is old instruction affecting the release of constraint, the master station will restore the target object to the normal AVC regulation range and reallocate the control quantity according to the current voltage deviation of the new energy grid connection point and the current reactive power margin of the target object; When the constraint type is reverse offset constraint, the master station prioritizes maintaining the smooth movement of adjacent target objects and restricting large movements, and prioritizes allocating this round of adjustment to target objects that correspond to the voltage deviation of the current new energy grid connection point.

[0008] In some embodiments, before determining the control strategy for this round based on the constraint type, the method further includes: When the old instruction is within the allowed execution time window and the directional consistency is higher than the preset threshold, the constraint type is the same-direction repeated adjustment constraint; When an old instruction exceeds the allowed execution time window, the constraint type is "Old Instruction Affects Constraint Removal"; When the actual electrical change direction is opposite to the expected direction, the constraint type is reverse cancellation constraint.

[0009] In some embodiments, when the constraint type is a repetitive adjustment constraint in the same direction, and the consistency between the current actual electrical change and the expected electrical change of the old instruction is greater than a threshold, restricting the continued issuance of reactive power adjustment in the same direction to the same target object to suppress the superposition of new and old instructions, further includes: When the constraint type is a repetitive adjustment constraint in the same direction and the basic target reactive power adjustment amount belongs to the restricted adjustment direction, risk reduction is performed. When the basic target reactive power adjustment is opposite to the restricted adjustment direction, the basic target reactive power adjustment is used as a correction candidate and the adjustment range is restricted.

[0010] In some embodiments, the target object is determined based on a comparison between the operational data and the AVC target voltage range, specifically including: If the voltage at the grid connection point of the new energy source is within the AVC target voltage range and does not show a trend of approaching the boundary of the AVC target voltage range, then the current target object will be maintained. If the voltage at the new energy grid connection point is lower than or continuously close to the lower boundary of the target range, then a target object with positive reactive power support capability shall be selected first; if the current voltage at the new energy grid connection point is higher than or continuously close to the upper boundary of the target range, then a target object that can reduce reactive power support or absorb reactive power shall be selected. If the adjustability of new energy inverters and reactive power compensation devices is insufficient, then transformer tap changers should be included as the target.

[0011] In some embodiments, the operational data includes at least: voltage at the new energy grid connection point, reactive power output of the target object, reactive power margin of the target object, and power flow trend of related lines.

[0012] In some embodiments, the instruction risk constraint includes a restricted target object, a restricted adjustment direction, a restricted adjustment range, and a constraint type.

[0013] In some embodiments, the actual electrical change direction includes the actual change direction of the voltage at the new energy grid connection point, the actual change direction of the reactive power output of the target object, and the actual change direction of the power flow of related lines. The actual change direction of the voltage at the new energy grid connection point is obtained by comparing the grid connection point voltage within the observation period after the dispatch automation master station issues the command with the grid connection point voltage before the issuance of the command. The actual change direction of the reactive power output of the target object is determined by the reactive power output change of the target object transmitted by the control interface of the substation AVC substation, the substation monitoring system, or the reactive power compensation device. The actual change direction of the power flow of related lines is obtained by comparing the power flow change trend of related lines in the voltage control area to which the target object belongs before and after the issuance of the command.

[0014] In some embodiments, after calculating the electrical response consistency of the constrained AVC control commands, the method further includes: When the electrical response consistency is in a high consistency state and the voltage at the new energy grid connection point recovers to the target range, the constrained AVC control command is confirmed. When the electrical response consistency is in an intermediate state, the target object is marked as a limiting call object; When the electrical response consistency is in a low consistency state and there is a risk of exceeding the limit at the grid connection point voltage, a new constrained AVC control command is generated.

[0015] To achieve the above objectives, another aspect of the present invention proposes a dispatch automation master station AVC reactive power optimization control system for new energy access, comprising: The instruction record construction module is used to read the operating quantity data related to the current reactive power control at the beginning of the AVC control cycle, determine the target object based on the comparison result between the operating quantity data and the AVC target voltage range, determine the target reactive power adjustment amount based on the adjustment amount required for the current voltage deviation and the available reactive power margin of the target object, generate the expected electrical change direction based on the target reactive power adjustment amount, determine the allowable execution time window of the AVC instruction based on the type of the target object and the AVC control cycle, and construct the AVC instruction status record based on the operating quantity data, the target reactive power adjustment amount, the expected electrical change direction and the allowable execution time window. The risk constraint construction module is used to read the AVC instruction status record, generate the actual electrical change direction within the current AVC control cycle, calculate the direction consistency between the actual electrical change direction and the expected electrical change direction, and generate a repeated adjustment risk coefficient based on the direction consistency, combined with the time validity status of the old instruction and the available reactive power margin of the target object. The main station generates instruction risk constraints based on the repeated adjustment risk coefficient. The control instruction construction module is used to read the instruction risk constraints, and within the current AVC control cycle, obtain the basic target reactive power adjustment amount according to the preset AVC voltage reactive power control logic, calculate the constrained target reactive power adjustment amount based on the basic target reactive power adjustment amount and the repeated adjustment risk coefficient, and generate constrained AVC control instructions based on the constrained target reactive power adjustment amount. The optimization control module is used to calculate the electrical response consistency of the constrained AVC control command, and generate closed-loop optimization control results based on the electrical response consistency, the current voltage state of the new energy grid connection point, and the current reactive power margin of the target object.

[0016] The beneficial effects of this invention are as follows: By integrating the old command status under uncertain communication conditions, the current voltage recovery requirements, and the actual electrical response into the rolling control process of the dispatch automation master station AVC, the master station can form a continuous closed-loop control around the voltage of the new energy grid connection point, the reactive power output of the target object, the reactive power margin of the target object, and the power flow change trend of related lines. When the master station generates AVC reactive power control commands, it simultaneously creates an AVC command status record containing the command number, target object, target reactive power adjustment amount, issuance time, allowed execution time window, and expected electrical change direction. The expected electrical change direction incorporates the voltage change direction of the renewable energy grid connection point, the reactive power change direction of the target object, and the power flow change direction of the relevant lines into the same control semantics, ensuring that each command can still be identified and used in subsequent control cycles even under conditions of communication delay, packet loss, or out-of-order delivery. In the next control cycle, the master station compares the AVC command status record with the current actual electrical change direction and generates command risk constraints based on the allowed execution time window and the reactive power margin occupancy of the target object. This transforms the possibility of old commands still having an effect into a restricted target object, restricted adjustment direction, restricted adjustment range, and constraint type, allowing the potential delayed effect of old commands to directly enter the next round of AVC reactive power optimization. When generating the current round of control commands, the master station embeds the risk constraints of the command into the calculation of coordinated control quantities for new energy inverters, reactive power compensation devices, and transformer tap changes. By combining risk reduction, voltage urgency protection, and limited adjustment range boundaries, the constrained target reactive power adjustment quantity is determined, ensuring that the grid connection point voltage retains the necessary voltage recovery capability when it approaches the safety boundary, while suppressing the superposition of old and new commands in the same direction. After the constrained AVC control command is issued, the master station forms the actual electrical change direction within the allowed execution time window based on the grid connection point voltage, the reactive power output of the target object, and the power flow trend of related lines. It then makes a consistency judgment with the expected electrical change direction of the command, and accordingly completes closed-loop confirmation, target object limit call, adjustment task transfer, or reissues a new constrained AVC control command.

[0017] Through the above method, this invention connects "electrical semantic recording during instruction generation, generation of risk constraints for old instructions, issuance of constrained control instructions, and closed-loop handling of actual electrical responses" into a continuous control chain. This enables the dispatch automation master station AVC to no longer rely solely on a single execution receipt to determine the control state under communication disruption conditions. Instead, it utilizes existing equipment-level electrical measurement data from the master station to absorb and correct the potential impact of old instructions and the current control effect at the control level. This allows for risk-aware coordinated control of new energy inverters, reactive power compensation devices, and transformer tap changes based on the existing master station AVC architecture. This reduces the risks of overlapping, redundant adjustments, and reverse cancellation of old and new instructions caused by communication delays and out-of-order communication, and also reduces insufficient voltage recovery caused by inconsistencies between execution receipts and actual electrical responses. As a result, it improves the safety, continuity, and reactive power resource utilization efficiency of AVC closed-loop reactive power optimization control in scenarios of large-scale new energy access. Attached Figure Description

[0018] Figure 1 A flowchart of a reactive power optimization control method for a dispatch automation master station (AVC) for new energy access, provided in a specific embodiment of the present invention; Figure 2 Voltage distribution diagrams of nodes under different scenarios provided for specific embodiments of the present invention; Figure 3 The block diagram of the AVC reactive power optimization control system for dispatch automation master station for new energy access provided in a specific embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example refer to Figure 1 As shown in the figure, this embodiment of the invention proposes a reactive power optimization control method for a dispatch automation master station (AVC) oriented towards new energy access, including: S1: At the start of the AVC control cycle, read the operating data related to the current reactive power control. Determine the target object based on the comparison between the operating data and the AVC target voltage range. Determine the target reactive power adjustment amount based on the required adjustment amount for the current voltage deviation and the available reactive power margin of the target object. Generate the expected electrical change direction based on the target reactive power adjustment amount. Determine the allowable execution time window for the AVC command based on the type of the target object and the AVC control cycle. Construct an AVC command status record based on the operating data, target reactive power adjustment amount, expected electrical change direction, and allowable execution time window, specifically including: In this step, the voltage, reactive power, and power flow data calculated and recorded by the master station all use the same time and data references within the same dispatch automation system. The voltage at the grid connection point of new energy sources can use primary, secondary, or per-unit values, but it should be unified to the same voltage reference within the same control area.

[0021] S11: At the beginning of an AVC control cycle, the dispatch automation master station reads the operational data directly related to the current reactive power control, including the voltage of the renewable energy grid connection point, the reactive power output of the target object, the reactive power margin of the target object, and the power flow trend of related lines. The voltage of the renewable energy grid connection point is obtained by the master station through the SCADA telemetry channel, the substation remote control interface, or the upload channel of the renewable energy plant AVC substation; the reactive power output of the target object is obtained by the substation AVC substation, the substation monitoring system, or the control interface of the reactive power compensation device. Among them, the reactive power output of the renewable energy inverter, SVG, SVC, and capacitor reactor is its current actual reactive power output. The reactive power output of the transformer tap is converted into the equivalent reactive power regulation state according to the correspondence between tap position, voltage regulation, and equivalent reactive power regulation pre-configured in the master station AVC parameter table.

[0022] The reactive power margin of the target object is determined by the current reactive power output of the target object and its operating boundary. The reactive power margin of the new energy inverter is calculated by the AVC substation of the power station based on the inverter's current active power output, capacity constraints and operating limits and then sent up. The reactive power margin of the SVG, SVC or capacitor reactor is given by its control unit based on the current switching or adjustment status. The reactive power margin of the transformer tap is the equivalent reactive power adjustment margin after the available tap positions are converted according to the above correspondence. The trend of power flow change of the relevant lines is obtained by the master station reading the power flow of the lines directly related to the voltage control area where the target object is located and comparing the direction of power flow change in adjacent AVC control cycles.

[0023] S12: After reading the voltage at the renewable energy grid connection point, the master station compares it with the AVC target voltage range. If the grid connection point voltage is within the target range and does not show a trend of approaching the boundary, the master station maintains the current control state. If the grid connection point voltage is lower than the lower boundary of the target range or continuously approaches the lower boundary, the master station prioritizes selecting target objects from renewable energy inverters or reactive power compensation devices that still have positive reactive power support capabilities. If the grid connection point voltage is higher than the upper boundary of the target range or continuously approaches the upper boundary, the master station prioritizes selecting target objects that can reduce reactive power support or absorb reactive power. If the adjustability of the renewable energy inverter and reactive power compensation device is insufficient and the voltage deviation persists, the master station then includes the transformer tap changer as a target object. Thus, the master station completes the target object screening before generating the AVC command and matches the target object selection with the direction of the renewable energy grid connection point voltage deviation, the reactive power margin of the target object, and the power flow change trend of the relevant lines.

[0024] S13: After the target object is determined, the master station generates the target reactive power regulation amount. This target reactive power regulation amount is determined between the regulation amount required for the current voltage deviation and the available reactive power margin of the target object, so that the regulation amount in this round matches the current voltage control demand and reserves regulation margin for subsequent control cycles. This process is derived from the classic sensitivity approach in voltage-reactive power control, that is, within the local voltage control area, there is a pre-tunable correspondence between the voltage change direction of the new energy grid connection point and the reactive power change direction of the target object. This directional relationship is written into the AVC command status record, so that the command has verifiable electrical semantics in subsequent steps. The expected electrical change direction is formed by the following formula: ; in, Indicates the first The expected electrical change direction of an AVC instruction consists of three directional quantities, which respectively represent the expected voltage change direction at the grid connection point, the expected reactive power change direction of the target object, and the expected power flow change direction of the line. This indicates the AVC instruction number, which is assigned by the scheduling automation master station according to the order in which the instructions are generated. Indicates the first The target reactive power regulation of the AVC command, for new energy inverters, SVG, SVC, or capacitor reactors, For transformer tap changes, the actual reactive power regulation of the target object is... The equivalent reactive power regulation amount is calculated based on the AVC parameter table of the main station for the tap changer's voltage regulation function. This indicates the correspondence between the reactive power change of the target object and the voltage change direction at the grid connection point, derived from the adjustment direction configuration of the voltage control area to which the target object belongs in the master station AVC parameter table; This indicates the correspondence between the reactive power change of the target object and the power flow change direction of the related lines, which comes from the association configuration of the target object and related lines in the master station; This indicates the direction sign is to be taken, and the direction code is added as follows: No significant change was coded as Reduce directional coding .

[0025] In the formula and The directional relationship is derived from the AVC configured in the dispatch automation master station during project commissioning or setting. Based on the influence relationship between the reactive power change of the target object and the voltage change of the grid connection point and the power flow change of related lines, the positive, negative or no obvious correlation state is taken. Before participating in the calculation, the master station processes it according to the unified positive direction convention of AVC.

[0026] In a typical photovoltaic grid-connected scenario, the master station detects a low voltage at the grid connection point of the photovoltaic power plant during a certain control cycle. The inverter group transmitted from the power plant's AVC substation still has a positive reactive power support margin. The master station selects this inverter group as the target and generates an AVC command to increase reactive power support. At this time, the... 1 instruction Take the positive direction; the increase in reactive power in this inverter group will raise the grid connection voltage, so The positive direction is taken; the power flow of the sending line corresponding to the target object changes positively with the reactive power adjustment in the master station's associated configuration, therefore... Take the positive direction. Substitute it into the above equation, The results obtained are: "Expected increase in grid connection point voltage, expected increase in reactive power output of the target object, and expected positive trend in line power flow." In another scenario, if the voltage at the renewable energy grid connection point is too high, and the main station requires a certain SVG to absorb reactive power, then... The direction of absorption is recorded as reverse; if the reactive power absorption of the SVG will reduce the grid connection voltage, then the first direction is the reduction; the second direction is the reactive power absorption direction; the third direction is determined according to the associated configuration of the line to which the SVG belongs. In this way, the master station obtains the expected electrical direction that can be verified at the same time as generating the command, so that subsequent steps can determine whether the old command may still be effective based on the actual grid connection voltage, the reactive power output of the target object, and the trend of line power flow changes.

[0027] S14: The master station then determines the permissible execution time window for the AVC command. The permissible execution time window is written once during command generation and is determined by the master station based on the AVC control cycle and the type of target object: For renewable energy inverters and dynamic reactive power compensation devices, which respond quickly, the time window is set to a shorter control cycle range; for capacitors, reactors, and transformer tap changes involving switching, mechanical actions, or interlocking judgments, the time window is set to a relatively longer control cycle range. This time window indicates how long the command can still represent the master station's current control intent. After forming the target object, target reactive power adjustment amount, permissible execution time window, and expected electrical change direction, the master station writes this information into the AVC command status record. This record includes the command number, target object, target reactive power adjustment amount, issuance time, permissible execution time window, and expected electrical change direction.

[0028] The instruction number is generated by the master station; the target object is selected by the master station based on the voltage deviation direction and reactive power margin; the target reactive power adjustment amount is jointly limited by the voltage regulation demand and the reactive power margin of the target object; the issuance time is written by the master station's unified clock; the allowed execution time window is determined by the target object type and AVC control cycle configuration; the expected electrical change direction is obtained from the above formula. This AVC instruction status record is synchronously stored in the master station's AVC instruction status cache along with the upcoming AVC control instruction, serving as input for generating instruction risk constraints in step S2. Step S2 uses the allowed execution time window to determine whether the old instruction may still be in effect, uses the expected electrical change direction to determine whether the current grid connection point voltage, target object reactive power output, and line power flow change trends may be caused by the old instruction, and uses the target object and target reactive power adjustment amount to form the basis for restricting repeated adjustments in the same direction. Through this process, the master station establishes traceable electrical semantics for each AVC instruction before communication delays, packet loss, or out-of-order events occur, enabling subsequent AVC reactive power optimization to constrain and control around the potential impact of the old instruction.

[0029] In one implementation, the master station AVC control cycle can adopt the cycle already configured in the engineering system, for example, on the order of several seconds to tens of seconds. The allowable execution time window for fast and continuous adjustment objects such as new energy inverters, SVG, or SVC can be set to one to two AVC control cycles, while the allowable execution time window for slower objects such as capacitor and reactor switching or transformer tapping operations can be set to two to five AVC control cycles. The aforementioned time windows do not require all engineering systems to have the same fixed value, but they must be pre-configured in the master station AVC parameter table and consistent with the actual response time, latch-up time, and communication delay tolerance range of the target object, so that step S2 can determine whether the old command may still be effective according to a clear time boundary.

[0030] S2: Read the AVC instruction status record and generate the actual electrical change direction within the current AVC control cycle. Calculate the directional consistency between the actual electrical change direction and the expected electrical change direction. Based on the directional consistency, combined with the time validity status of the old instruction and the available reactive power margin of the target object, generate a repetitive adjustment risk coefficient. The main station generates instruction risk constraints based on the repetitive adjustment risk coefficient, specifically including: S21: Receive the AVC command status record output from step S1 and convert it into command risk constraints that can be directly used in the next round of AVC reactive power optimization. The AVC command status record output from step S1 includes command number, target object, target reactive power adjustment amount, issuance time, allowed execution time window, and expected electrical change direction.

[0031] This step uses the above content item by item: the instruction number is used to lock the old AVC instruction to be judged; the target object is used to determine which renewable energy inverter, transformer tap, or reactive power compensation device the constraint is applied to; the target reactive power adjustment is used to determine the constraint direction and the degree of adjustment occupancy; the issuance time and the allowed execution time window are used to determine whether the old instruction is still in the effective stage; the expected electrical change direction is used to compare the direction consistency with the current actual electrical change. The dispatch automation master station reads the renewable energy grid connection point voltage, target object reactive power output, and related line power flow change trends within the current AVC control cycle, and forms the actual electrical change direction according to the same positive direction convention in step S1. .in, With step S1 They have the same ternary structure, which sequentially represents the current actual grid connection point voltage change direction, the current actual target object reactive power change direction, and the current actual line power flow change direction. Indicates the first The expected electrical semantics written during the generation of the old AVC instructions. This indicates the actual electrical semantics observed by the master station in the current control cycle. The two are compared under the same target object, the same line association, and the same positive direction convention.

[0032] The main site will first and The directional quantities in the code are uniformly encoded into three states: increasing direction, no significant change, and decreasing direction. The increasing direction is encoded as follows: No significant change was coded as Reduce directional coding For the voltage direction at the grid connection point, the master station compares the voltage changes at the renewable energy grid connection point between the current control cycle and the previous control cycle. For the reactive power direction of the target object, the master station compares the reactive power output changes of the target object between the current control cycle and the previous control cycle. For the power flow direction of the lines, the master station compares the power flow trends of the relevant lines in adjacent control cycles. If the change falls within the engineering dead zone range configured by the master station's AVC, the corresponding directional amount is recorded as... directional consistency The formation of this formula originates from the mathematical concept of weighted vector inner product, where the product of corresponding directional components represents the consistency or opposition of two sets of directions, and the weights reflect the importance of different components in AVC control. Since the primary control objective of this invention is to maintain stable voltage at the renewable energy grid connection point, the voltage direction at the grid connection point is given higher weight, while the reactive power direction and line power flow direction are used as auxiliary directions in the judgment. The calculation formula is as follows: ; in, Indicates the first The directional consistency of the old AVC directive is used to characterize the degree of closeness between the current actual electrical change direction and the expected electrical change direction of the old directive; , , These represent the outputs of step S1, respectively. The voltage direction of the new energy grid connection point, the reactive power direction of the target object, and the power flow direction of the line are obtained from the expected electrical change direction in the AVC command status record; , , These represent the formation of the current cycle. The voltage direction at the new energy grid connection point, the reactive power direction of the target object, and the power flow direction of the lines are obtained by the dispatch automation master station based on the changes in the grid connection point voltage, the reactive power output of the target object, and the power flow trends of the relevant lines in the current cycle and the previous cycle. The coefficients in the numerator... The denominator indicates the priority weight of the voltage direction at the grid connection point of new energy sources in AVC risk assessment. This is the sum of the weights of the three directions. This formula is derived from the similarity of ordinary vector inner products. In this application, the continuous amplitude component in the ordinary inner product is replaced with three types of directional components: voltage, reactive power, and power flow. The voltage direction at the grid connection point of new energy sources is weighted, making it applicable to the determination of the electrical action direction of the old AVC command under conditions of communication interference.

[0033] S22: After establishing directional consistency, the master station further combines the time validity status of the old instructions with the current available reactive power margin of the target object to generate a risk coefficient for repeated adjustments. This calculation originates from the gating and resource utilization ratio concepts in control engineering: time gating is used to determine whether old commands are still within the effective range recognized by the master station; directional consistency is used to determine whether the expected electrical changes of old commands have been reflected in the current power grid measurements; and the regulation utilization ratio reflects the degree to which the target regulation of the old command is utilized relative to the current available reactive power margin of the target object. The following calculation formula is derived from this: ; in, Indicates the first The risk factor of the old AVC instruction for the next round of AVC adjustment in the same direction; Indicates the first The validity period identifier for an old AVC instruction is determined by the master station based on the current control cycle time, the issuance time in the instruction's status record, and the allowed execution time window. The current cycle must be within the allowed execution time window. When the current cycle exceeds the allowed execution time window ; This indicates the degree of directional consistency obtained from the previous equation; Following the meaning of step S1, it indicates the first The target reactive power regulation of each AVC instruction is the equivalent reactive power regulation after conversion for transformer taps. This represents the available reactive power margin of the target object in the current control cycle. For new energy inverters, SVG, SVC, or capacitor reactors, it is the actual available reactive power margin; for transformer taps, it is the equivalent reactive power adjustment margin calculated according to the master station AVC parameter table for the available tap position. In the formula... Convert the directional consistency into a non-negative proportional factor; This indicates the extent to which the target adjustment amount of the old instruction occupies the currently available adjustment margin. This formula combines the timeliness of the old instruction, electrical direction consistency, and reactive power margin occupancy into a single risk coefficient, allowing step S3 to be directly based on... Limit the amplitude of unidirectional adjustments to the same target object or the same voltage control area.

[0034] In a photovoltaic (PV) power grid connection scenario, assuming step S1 generates a reactive power AVC command targeting the PV inverter group, the target object in the command status record is the inverter group, and the target reactive power regulation is... For positive regulation, the execution time window is allowed to cover the current control cycle, and the direction of electrical change is expected. The expected increase is due to "a rise in voltage at the new energy grid connection point, a rise in reactive power output from the target inverter group, and a positive trend in power flow across the lines." Within the current cycle, the main station reads that the voltage at the new energy grid connection point is rising towards the target range, the reactive power output of the inverter group is increasing, and the power flow trend of the relevant lines has not yet shown significant changes. Therefore, a positive trend can be formed. , , ,as well as , , Substituting into the formula for calculating directional consistency, we obtain... If the old instruction is still within the allowed execution window, then If the target reactive power adjustment of the old instruction is The current inverter group has a reactive power margin of [missing information]. The risk coefficient is The results indicate that the old reactive power increase command has a strong effect in both voltage and reactive power direction, and the target adjustment amount of the old command accounts for a relatively high proportion of the remaining margin. In step S3, the master station limits the reactive power increase adjustment in the same direction of the inverter group and prioritizes small corrections or calls target objects with lower risk coefficients and still reactive power margins in the same area.

[0035] In another SVG voltage regulation scenario, step S1 generates an AVC instruction to absorb reactive power. This indicates that "the grid connection point voltage is expected to decrease, the reactive power output of the target object enters the absorption direction, and the line power flow changes according to the configured direction." If, during the current cycle, the master station reads that the voltage at the renewable energy grid connection point continues to rise, the SVG reactive power output does not enter the absorption direction, and the line power flow changes do not develop in the expected direction, then... Entering a low-consistency or reverse state. If the instruction is still within the allowed execution time window, the master station converts the old instruction into an observational limiting constraint, that is, step S3 applies a small correction to the adjacent target object in the SVG or electrical coupling area and restricts the immediate triggering of a large-scale opposite direction action; if the instruction has already exceeded the allowed execution time window, then... , No longer imposing continuous restrictions on the next round of directional adjustments, step S3 can reselect the target object based on the current grid connection point voltage, the reactive power margin of the target object, and the trend of line power flow changes. For old instructions involving transformer tap changers, the master station determines the execution time window according to its longer allowable time window. The main criteria for judgment are the direction of voltage at the grid connection point and the trend of power flow changes in the line. The available tap margin is converted into an equivalent reactive power regulation margin and then used as the basis for judgment. Input, thereby forming a risk coefficient applicable to the tap changer's action characteristics.

[0036] S23: Main site according to Generate instruction risk constraints. These constraints consist of a restricted target object, a restricted adjustment direction, a restricted adjustment range, and a constraint type. The restricted target object is obtained from the target object recorded in the AVC instruction status in step S1; the restricted adjustment direction is determined by… The direction is obtained; the limited adjustment range is denoted as ,in This indicates the upper limit of the current-round limiting that can be directly used in step S3, determined by the main station based on the current available reactive power margin of the target object. The single-cycle adjustment limit of the target object and the constraint type are jointly determined; the constraint type is determined by... and The combined state is determined. When the old instruction is within the allowed execution time window and the direction consistency is high, the constraint type is same-direction repeated adjustment constraint; when the old instruction exceeds the allowed execution time window and the direction consistency is low, the constraint type is old instruction influence release constraint; when the actual electrical change direction is opposite to the expected direction, the constraint type is reverse cancellation constraint. For the case where there are multiple unclosed AVC instruction state records for the same target object within multiple consecutive control cycles, the master station calculates them one by one according to the instruction number. And will still be within the valid time range and The highest constraint is used as the primary constraint for the next round of AVC optimization of the target object, while the remaining constraints are reserved as auxiliary states for subsequent closed-loop processing.

[0037] This step outputs an instruction risk constraint. This instruction risk constraint directly proceeds to step S3, which is used to generate constrained AVC control instructions. Step S3 reads the constrained target objects to determine which new energy inverters, transformer taps, or reactive power compensation devices need to be limited; reads the constrained adjustment directions to determine which directions of reactive power adjustment need to be suppressed; and reads the constrained adjustment range. The process involves determining a new upper limit for reactive power control; reading the constraint type; and determining whether to adopt unidirectional limiting, minor correction, reselecting the target object, or removing the influence of the old instruction. Through this process, the AVC instruction status record established in step S1 is transformed into an executable control boundary, enabling the potential effects of the old instructions under conditions of communication delay, packet loss, or out-of-order delivery to participate in the next round of AVC reactive power optimization.

[0038] In this step, all directional quantities are dimensionless coded quantities. and All results are dimensionless proportional. It is a binary identifier. It is a non-negative reactive power margin, and and Using the same reactive power unit; when When the value is zero or the target object is in an uncontrollable, locked, or exited operating state, the master station does not generate a risk amplification result in the same direction for that object. Instead, it marks the old instruction as unexecutable or pending manual review and prioritizes other controllable target objects within the same voltage control area. The thresholds used to determine "higher consistency," "intermediate consistency," and "lower consistency" are pre-configured as dimensionless thresholds in the master station's AVC parameter table. Typically, the high consistency threshold is higher than the intermediate threshold, and the low consistency threshold is lower than the intermediate threshold, and is adjusted according to the control area, voltage level, and target object type. For example, in one implementation, the threshold can be... Not less than As a high degree of consistency, Greater than But lower As a middle ground, Not higher than This represents a lower consistency or reverse state. The above values ​​are only one possible tuning method; in engineering applications, they are fixed by the master station parameter table. Therefore, this step does not rely on temporary experience to determine the constraint type.

[0039] S3: Read the instruction risk constraint, and within the current AVC control cycle, obtain the basic target reactive power regulation amount according to the preset AVC voltage reactive power control logic. Calculate the constrained target reactive power regulation amount based on the basic target reactive power regulation amount and the repetitive adjustment risk coefficient. Generate a constrained AVC control instruction based on the constrained target reactive power regulation amount, specifically including: S31: Receive the command risk constraints output from S2 and convert them into the constrained AVC control commands actually issued in this round. The command risk constraints output from step S2 include the constrained target object, constrained adjustment direction, constrained adjustment range, and constraint type. They also include a repeated adjustment risk coefficient formed by the timeliness of the old AVC commands, electrical direction consistency, and the reactive power margin occupancy of the target object. .

[0040] This step uses the above content item by item: The restricted target object is used to determine the renewable energy inverters, transformer taps, or reactive power compensation devices that require limiting in this round; the restricted adjustment direction is used to determine whether the current basic target reactive power adjustment has a risk of overlapping with the old instructions in the same direction; the restricted adjustment range is used to limit the upper limit of the same-direction adjustment in this round; the constraint type is used to determine whether to adopt same-direction limiting, minor correction, removal of historical restrictions, or suppression of reverse cancellation actions in this round. The dispatch automation master station reads the renewable energy grid connection point voltage, target object reactive power output, target object reactive power margin, and related line power flow trends within the current AVC control cycle, and first obtains the basic target reactive power adjustment according to the existing AVC voltage reactive power control logic. Then, the risk constraint of the instruction output in step S2 is embedded into the adjustment quantity generation process to obtain the constrained target reactive power adjustment quantity that can be actually issued in this round. Therefore, the risk boundary formed in step S2 is implemented in step S31 in terms of the selection of the control object, the adjustment direction, and the adjustment range, so that the potential delay effect of the old instructions directly participates in the generation of the current AVC instructions.

[0041] S32: When formulating the constrained target reactive power regulation for this round, the master station adopts a calculation method combining "risk reduction, voltage urgency guarantee, and limited amplitude boundary". The initial sources for this method include classic amplitude limiting control and saturation control: amplitude limiting control ensures the control quantity falls within the allowable range of the executed object, while saturation control prevents the control quantity from exceeding the object's capacity boundary; based on this, the repeated regulation risk coefficient obtained in step S2 is... The introduction of a reduction mechanism for adjustment amounts means that the higher the risk of older directives, the smaller the adjustment amount in the same direction in this round; simultaneously, the urgency of the current renewable energy grid connection voltage is taken into account. This ensures that the voltage at the new energy grid connection point remains sufficient to maintain necessary voltage recovery capability when it approaches the safety boundary; and limits the adjustment range output in step S2. This serves as the final amplitude limit. Its calculation formula is as follows: ; in, This round indicates that the target is the first The constrained target reactive power regulation amount generated by the old AVC instruction corresponding to the constrained target object is used to write the constrained AVC control instruction in this round. This means that the basic target reactive power regulation amount obtained by the master station based on the current voltage deviation of the new energy grid connection point, the reactive power output of the target object, the reactive power margin of the target object and the power flow change trend of the relevant lines is calculated by the existing AVC control logic of the dispatch automation master station within the current control cycle. The repeated adjustment risk coefficient output in step S2 is formed by the time validity status of the old AVC instruction, the direction consistency, and the degree of reactive power margin occupancy of the target object. This indicates the urgency of the current grid connection point voltage, which is determined by the dispatch automation master station based on the position of the new energy grid connection point voltage relative to the AVC target range. When the new energy grid connection point voltage is in the middle of the target range, it is in a low urgency state; when the new energy grid connection point voltage is close to the boundary of the target range, it is in a medium urgency state; and when the new energy grid connection point voltage has exceeded the limit or continues to be close to the boundary, it is in a high urgency state. This indicates the limited adjustment range of the S2 output. The positive upper bound is determined by the main station based on the target object's current available reactive power margin, the target object's single-cycle adjustment upper limit, and the constraint type; This indicates a limiting process, which restricts the target reactive power regulation amount, after risk reduction and voltage urgency correction, to the limited regulation range given in step S2.

[0042] The derivation of this formula is as follows: First, the desired adjustment amount is obtained from the basic AVC control logic. Subsequently, based on the risk coefficient formed in step S2 Compress the repeated adjustments in the same direction; then through The compression level is adjusted so that the control quantity is retained at a higher proportion as the voltage approaches the safety boundary; finally, the output from step S2... A final limit is applied to ensure that the control quantity in this round falls within the executable boundary. In the formula... , and For the same type of reactive power regulation, the equivalent reactive power regulation after conversion is used for transformer tap changes. and This is a proportional control quantity; the value in parentheses is the adjustment proportional factor. To prevent the adjustment direction from being changed by the risk reduction item, and The engineering values ​​are configured within a closed interval, so that... It remains a non-negative proportion.

[0043] In a typical photovoltaic power plant scenario, the risk constraint of the command output in step S2 indicates that the reactive power increase AVC command issued to a certain photovoltaic inverter group in the previous cycle is still within the allowable execution time window, and the current grid connection point voltage and the reactive power output of the inverter group have both changed in the expected direction, thus reducing the risk factor of repeated adjustment. for The current cycle master station obtains the basic target reactive power regulation of the inverter group based on the low voltage at the new energy grid connection point. positive The limited adjustment range output in step S2 is: ,Right now The voltage at the new energy grid connection point is close to the lower boundary of the target range but has not yet exceeded the limit. The main station will adjust the voltage urgency. Take as Substituting into the above formula, the proportionality factor after the combined effect of risk and urgency is: The adjustment amount after risk reduction is This value is located at Within the range, therefore, the final result is Based on this, the main station issues a small reactive power correction command to the inverter group and allocates the remaining reactive power regulation demand to SVG or other inverter groups with lower risk coefficients and still having reactive power margins within the same voltage control area. If the voltage at the renewable energy grid connection point has already exceeded the limit in the same scenario, Under high urgency conditions, the proportional factor increases accordingly, allowing the constrained control command to retain more voltage recovery capability; if the voltage at the new energy grid connection point is in the middle of the target range, Taking a low-urgency state, the risk of old instructions has a stronger compression effect on the current round of same-direction adjustment. This calculation process incorporates the risk of old instructions taking effect late, the current voltage safety urgency, and the limited adjustment range output from step S2 into the generation of the current round of control quantities simultaneously.

[0044] S33: The master station determines the control strategy for this round based on the constraint type. When the constraint type is a repetitive adjustment constraint in the same direction, it indicates that the old AVC command is still within the allowed execution time window, and step S2 determines that the current actual electrical change and the expected electrical change of the old command have a high degree of consistency. In this case, continuing to issue reactive power adjustment in the same direction to the same target object in this round is likely to result in the superposition of old and new commands. The master station includes the target object in the same direction limited object and identifies the current basic target reactive power adjustment amount according to the restricted adjustment direction in step S2. If the direction is restricted, risk reduction is applied. If the current basic adjustment demand is opposite to the restricted direction, it is considered a candidate for minor correction, and the adjustment range is limited based on the constraint type to ensure smooth control changes during the period when the old command may still be in effect. When the constraint type is the release of the constraint due to the old command, the master station restores the target object to the normal AVC adjustment range and reallocates the control quantity according to the current grid connection point voltage deviation and reactive power margin. When the constraint type is a reverse cancellation constraint, the master station prioritizes maintaining smooth actions of adjacent target objects, restricts large actions in opposite directions within the electrical coupling area, and prioritizes allocating the current round of adjustment to target objects that have a more direct relationship with the grid connection point voltage deviation, sufficient reactive power margin, and lower risk coefficient. For new energy inverters and dynamic reactive power compensation devices, the master station prioritizes continuous adjustment; for capacitor reactors and transformer taps, the master station generates action commands when the voltage deviation persists and the rapid reactive power resource adjustment margin is insufficient, so that target objects with different response speeds form hierarchical coordination within the same AVC control cycle.

[0045] For the removal of constraints caused by old commands, the master station reads the restricted target object, restricted adjustment direction, and restricted adjustment range output in step S2, removes the historical limit on the target object in the corresponding direction, and generates a new AVC control command according to the current basic target reactive power adjustment and the current available reactive power margin. For reverse cancellation constraints, the master station includes other target objects with strong electrical coupling to the restricted target object in the same voltage control area as small correction objects, and makes their adjustment direction consistent with the current grid connection point voltage recovery direction. For example, if a reactive power absorption command was issued to a certain SVG in the previous cycle, and the grid connection point voltage continues to rise in the current cycle and the reactive power output of the SVG has not entered the absorption direction, then step S2 forms a reverse cancellation constraint; step S3 controls the switching action amplitude of adjacent capacitor banks accordingly, prioritizing the SVG to continue small correction or selecting a group of inverters in the same area with reactive power absorption capabilities to undertake part of the adjustment, so that the control chain remains continuous. For transformer taps, step S3 treats the tap action as a slow voltage regulation object. When the voltage recovery requirement cannot be met after the fast reactive power resources have been limited, a tap control command is generated and written with an allowable execution time window and the corresponding expected electrical change direction that match the mechanical action process, so that step S4 can make a closed-loop judgment according to the tap action characteristics.

[0046] When multiple candidate target objects exist within the same voltage control region, the master station determines the allocation of regulation based on both risk constraints and reactive power margin. The master station first iterates through the command risk constraints output in step S2 to identify whether each candidate target object is a restricted target object; for restricted target objects, it determines the allocation based on constraint type, restricted regulation direction, and... calculate For unrestricted target objects, the remaining regulation is handled according to the current reactive power margin and basic AVC control requirements. If multiple target objects can handle the remaining demand, the master station prioritizes target objects with sufficient reactive power margin, whose voltage regulation direction aligns with the target grid connection point, and which are not under high-risk constraints. If the combined regulation by the renewable energy inverter and reactive power compensation device is still insufficient to bring the grid connection point voltage back to the target range, the master station generates a transformer tap control command. Thus, the constrained AVC control command in this round completes the risk-aware reactive power redistribution among the renewable energy inverter, reactive power compensation device, and transformer tap.

[0047] S34: When the master station generates constrained AVC control commands, it simultaneously writes the target object, target reactive power regulation, issuance time, allowed execution time window, and expected electrical change direction into the issuance record. The target object is determined by the AVC optimization results after this round of risk constraint processing; the target reactive power regulation is determined by the basic target reactive power regulation after risk reduction, voltage urgency correction, and limitation of the restricted regulation range; the issuance time is written by the master station's unified clock; the allowed execution time window is determined according to the target object type and AVC control cycle configuration; the expected electrical change direction follows the formation method of step S1, and is obtained based on the target reactive power regulation, the voltage regulation direction relationship of the target object, and the line correlation direction relationship. The master station issues the constrained AVC control commands to the corresponding new energy plant AVC substations, inverter group controllers, reactive power compensation device control units, or transformer tap changer control devices through the dispatch data network or the plant AVC communication interface, and simultaneously saves the issuance record in the master station's AVC command status cache. The issued record is consistent with the AVC instruction status record structure in step S1, enabling step S4 to directly read the allowed execution time window and expected electrical change direction of the current instruction.

[0048] This step outputs a result: the constrained AVC control command and its issuance record. This output includes the actual target object issued in this round, the target reactive power regulation, the issuance time, the allowed execution time window, the expected electrical change direction, and the corresponding issuance record. Step S4 directly reads the constrained AVC control command and its issuance record, collects the voltage at the renewable energy grid connection point, the reactive power output of the target object, and the power flow trends of related lines within the allowed execution time window, and judges the consistency between the actual electrical change direction and the expected electrical change direction in the command. Through this step, the command risk constraint formed in step S2 is transformed into the actual issued control action, allowing the potential delay effect of the old AVC command under communication interference conditions to enter the reactive power optimization process in this round. Furthermore, through risk reduction and voltage urgency-based control quantity generation, it balances the suppression of the superposition of old and new commands and the recovery of the renewable energy grid connection point voltage.

[0049] In this step, The voltage urgency is a dimensionless value, obtained by the master station from a parameter table based on the position of the grid connection point voltage relative to the target voltage range and the safety boundary. For low urgency, a value close to zero can be used; for medium urgency, a value of a moderate proportion can be used; and for high urgency, a value close to one can be used. For example, in one implementation, when the grid connection point voltage is located in the middle of the target range... Desirable When approaching the boundary of the target interval but not yet exceeding the limit Desirable When the limit has been exceeded or the safety boundary has been continuously approached. Desirable to The above values ​​should be fixed in the setpoint table and maintained uniformly with the control area for the same project. , and All with Using the same reactive power unit, where The executable boundary shall not exceed the current available reactive power margin of the target object and the maximum allowable adjustment limit per single cycle; Only the amplitude is limited, without changing the unit or direction of the control quantity. If the constraints output in step S2 contain a missing measurement flag, an object lockout flag, or a low communication quality confidence flag, the master station will prioritize reducing the single-cycle adjustment amplitude of that target object in this step, and allocate the remaining adjustment requirements to other target objects with valid data quality and sufficient reactive power margin.

[0050] It should be noted that, Target object reactive power output, target object reactive power margin , , , All data use the same reactive power unit, typically Mvar or per-unit values ​​under a unified reactive power benchmark. Power flow trends are used only for directional coding; the original dimensions of MW, Mvar, or MVA are not directly substituted into directional consistency calculations. If telemetry data for a particular line is missing, the timestamp exceeds the master station's allowable deviation, or the quality bit is marked as invalid, the master station will not use the missing data to generate a strong control direction. Instead, it will set the corresponding directional quantity to show no significant change and write a missing measurement flag in the command status record. Subsequent steps will handle this using low confidence or amplitude limiting methods to avoid erroneous control due to unclear data sources.

[0051] S4: Calculate the electrical response consistency of the constrained AVC control command, and generate closed-loop optimized control results based on the electrical response consistency, the current voltage state of the new energy grid connection point, and the current reactive power margin of the target object. Specifically, this includes: S41: Receive the constrained AVC control command and its issuance record output from step S3, and complete the closed-loop processing based on the actual electrical changes caused by the command within the allowed execution time window. The constrained AVC control command and its issuance record output from step S3 include the target object and the target reactive power regulation. The issuance time, the allowed execution time window, and the expected direction of electrical change.

[0052] This step uses these elements item by item: the target object is used to determine the new energy inverter, transformer tap changer, or reactive power compensation device to be observed; the target reactive power regulation is... The control is used to determine whether the actual reactive power change in this round is consistent with the adjustment direction of the constrained command; the issuance time and the allowed execution time window are used to limit the observation range of the actual electrical response; the expected electrical change direction is used to determine its consistency with the actual grid connection point voltage, the reactive power output of the target object, and the power flow trend of the line. Within this allowed execution time window, the dispatch automation master station reads the new energy grid connection point voltage, the reactive power output of the target object, and the power flow trend of the relevant line, and forms the actual electrical change direction according to the same positive direction convention in steps S1 to S3. Therefore, the constrained AVC control command given in step S3 is further used in this step for electrical response verification and action generation, so that this round of control does not stop at issuing commands, but forms a closed-loop optimized control result for the next round of AVC.

[0053] When the master station forms the actual electrical change direction within the allowed execution time window, it takes the issuance time in step S3 as the starting point and the allowed execution time window as the observation boundary. For new energy inverters and dynamic reactive power compensation devices, the master station reads the reactive power output change of the target object and the voltage change of the new energy grid connection point within a shorter control cycle; for capacitor reactors and transformer taps, the master station observes the voltage change and line power flow change after their operation according to a longer allowed execution time window.

[0054] The actual electrical change direction consists of three parts: the actual change direction of the voltage at the new energy grid connection point, the actual change direction of the reactive power output of the target object, and the actual change direction of the power flow of related lines. The actual change direction of the voltage at the new energy grid connection point is obtained by comparing the grid connection point voltage within the observation period after the command is issued with the grid connection point voltage before the command is issued by the dispatch automation master station. The actual change direction of the reactive power output of the target object is obtained by the reactive power output change transmitted from the power station AVC substation, substation monitoring system, or reactive power compensation device control interface. The actual change direction of the power flow of related lines is obtained by comparing the power flow change trend of related lines in the voltage control area of ​​the target object before and after the command is issued by the master station. If a certain direction fluctuates within the engineering dead zone, the master station records that direction as having no significant change, so that short-term measurement jitter will not be mistaken for an effective control response.

[0055] This step uses electrical response consistency. This step determines whether the constrained AVC control commands in this round have produced the expected electrical response. The initial sources for this calculation are the weighted inner product similarity in mathematics and the response verification method in control engineering: the weighted inner product is used to compare whether two sets of directional quantities are consistent, and the response verification method is used to determine whether the system output changes in the expected direction after the control command is issued. In S2, directional consistency is used to determine whether the old command might create risk in the next round; in this step, the comparison of the same type of direction is derived as a closed-loop handling indicator to determine whether the constrained AVC control commands actually issued in S3 have produced the expected electrical response. Since the core control objective of AVC is the voltage at the new energy grid connection point, the voltage direction is given higher weight in the consistency calculation; since the directional inner product has a positive and negative range, this step shifts and normalizes the weighted inner product result into a proportional result that is easier for engineering judgment. The calculation formula is as follows: ; in, Indicates the first The electrical response consistency of a constrained AVC control command is used to determine the degree to which the actual electrical response of the command conforms to the expected direction of electrical change. , , These represent the expected direction of voltage change at the grid connection point, the expected direction of reactive power change of the target object, and the expected direction of power flow change in the constrained AVC control command output by S3, respectively, which are obtained from the expected electrical change direction in the issued record; , , These represent the actual grid-connected point voltage change direction, the actual target reactive power change direction, and the actual line power flow change direction within the allowed execution time window, respectively. They are obtained by the dispatch automation master station based on the grid-connected point voltage, target reactive power output, and related line power flow trends before and after the instruction is issued. Each vector is encoded according to increase, no significant change, and decrease, and processed according to the master station's unified positive direction convention. The coefficients in the numerator... Indicates the priority weight of the voltage direction at the grid connection point in the closed-loop processing; constant term Translate the weighted inverse product result to the non-negative range; denominator The corresponding value span after translation makes This becomes a proportional consistency degree. All terms in the formula are either directional coding quantities or proportional quantities, and the output is also a proportional result, making it suitable for determining the level of closed-loop processing.

[0056] In a grid-connected photovoltaic (PV) scenario, step S3 sends a constrained reactive power increase AVC control command to a PV inverter group, with a target reactive power regulation amount. For positive regulation, the expected electrical change direction in the issued record is "increase in grid connection point voltage, increase in reactive power output of the target device, and positive trend in line power flow." Within the allowed execution time window, if the master station reads that the grid connection point voltage is rising from a low level towards the target range, the reactive power output of the inverter group is increasing, and the power flow trend of the relevant lines has not yet changed significantly, then a positive trend can be formed. , , ,as well as , , Substituting into the above equation, we get... The results show that the constrained AVC control commands in this round are consistent with expectations in both the voltage and reactive power directions. Although the line power flow direction did not change significantly, the overall electrical response maintained a high degree of consistency with the command expectations. Based on this, the master station records the command as closed-loop completion and maintains the normal operation state of the inverter group in the next round of control. In another scenario, if step S3 issues a reactive power absorption command to an SVG, with the expected electrical change direction being "grid point voltage decreases, target reactive power output enters the absorption direction, and line power flow changes according to the configured direction," but the master station observes within the allowed execution time window that the grid point voltage continues to rise, the SVG reactive power output does not enter the absorption direction, and the line power flow direction is also opposite to expectations, then... Upon entering a low consistency state, the master station transfers the target object to a limit call state and recalculates new constrained AVC control commands when there is a risk of exceeding the current voltage limit.

[0057] S42: The master station bases its electrical response consistency. The current voltage status of the new energy grid connection point and the reactive power margin of the target object are processed in a closed loop. When the system is in a high consistency state and the voltage at the renewable energy grid connection point has recovered to the target range, the master station confirms that the constrained AVC control command of this round has completed the closed loop, maintains the target object within the normal AVC call range, and writes the record of this round's issuance, the actual electrical response direction, and the closed loop confirmation result into the master station's AVC command status cache. This process allows the next round of step S1 to continue using this target object as a normal candidate object and generate a new AVC command status record based on the current reactive power margin. When When the target object is in an intermediate state and the grid connection point voltage is still within the allowable range, the master station marks the target object as a limited-response object. In the next round of control, the reactive power regulation amplitude of the target object in the same direction is reduced, and priority is given to calling target objects within the same voltage control area that still have reactive power margin and high electrical response consistency. This approach is suitable for scenarios where the communication link has a short-term delay, the target object's response has not yet fully manifested, or the line power flow changes are not obvious. When the grid connection point voltage of the new energy source is in a low consistency state and there is a risk of exceeding the limit, the master station immediately recalculates a new constrained AVC control command based on the current grid connection point voltage, the reactive power margin of the target object, and the trend of line power flow changes. The adjustment task is then transferred to the new energy inverter or reactive power compensation device in the same area with sufficient available reactive power margin and a more direct response direction. When the reactive power resources are insufficient, the master station generates a transformer tap control command and writes an allowable execution time window and expected electrical change direction suitable for slow operation into it.

[0058] When multiple target objects within the same voltage control area participate in control simultaneously, the master station calculates the electrical response consistency line by line according to the issued records. The closed-loop optimization control results are then incorporated into the basis for the next round of AVC control. If multiple new energy inverter groups exhibit a high consistency state, the master station will continue to share the regulation demand according to their reactive power margin in the next round of control. If a target object continuously exhibits an intermediate consistency state, the master station will reduce its single regulation amplitude and allocate the remaining regulation demand to reactive power compensation devices with more stable responses in the same area. If a target object exhibits a low consistency state and the grid connection point voltage exceeds the limit, the master station will reduce its dependence on that target object and issue new constrained AVC control commands within the current control cycle. For transformer taps, the master station will focus on observing the grid connection point voltage direction and line power flow change trends within its allowed execution time window. The closed-loop optimization control results are used to determine whether the taps will continue to participate in voltage regulation in the next round, or whether the reactive power regulation task will be preferentially transferred to new energy inverters and reactive power compensation devices.

[0059] This step outputs a result: the closed-loop optimized control result. This result includes the closed-loop confirmation result of the constrained AVC control commands in this round, the target object's next round call status, the next round's allowed adjustment range status, and the new constrained AVC control commands reissued when there is a risk of voltage exceeding limits. The closed-loop confirmation result is determined by... The target object's next call status is determined jointly by the grid connection point voltage recovery status; the target object's next call status is determined by the handling result of high consistency, intermediate consistency, or low consistency; the next round's allowable adjustment range status is determined jointly by the target object's current response performance and reactive power margin; new constrained AVC control commands are regenerated and issued by the master station in accordance with method S3 when low consistency and voltage exceeds limits. This closed-loop optimized control result returns to the next round's step S1, serving as the basis for selecting the target object, determining the target reactive power adjustment amount, and setting the allowable execution time window when generating the AVC command status record in the next round. Through this process, the constrained AVC control commands issued in step S3 are confirmed by the electrical response and transformed into actual handling actions in step S4, enabling the dispatch automation master station to complete the AVC closed-loop reactive power optimization control of new energy inverters, transformer taps, and reactive power compensation devices even under communication delays, packet loss, or out-of-order conditions.

[0060] In this step, For dimensionless proportional consistency, the system is divided into high consistency, intermediate, and low consistency states according to the preset high and low consistency thresholds in the main station's AVC parameter table. These thresholds use the same directional encoding logic as the consistency thresholds in step S2, but can be individually adjusted based on the degree of conservatism in the closed-loop confirmation. For example, in one implementation, the system can... Not less than As a highly consistent state, Greater than or equal to And lower than As an intermediate state, Below As a low consistency state, if any key data in the grid connection point voltage, target reactive power output, or related line power flow is missing within the allowed execution time window, the master station will not assume the missing direction is in line with expectations, but will instead record the direction as having no significant change and lower the closed-loop confirmation level. If the grid connection point voltage data is missing or the quality bit is invalid, the closed-loop completion will not be confirmed; only the issued record will be retained and the system will be switched to amplitude-limited observation or manual review to avoid erroneous closed-loop conclusions due to missing measurements.

[0061] It should be noted that this invention does not simply detect communication link anomalies, nor does it merely mathematically limit the reactive power regulation of conventional AVC targets. Instead, it retains "AVC commands that have been issued but not yet confirmed for closed-loop operation" as control objects with electrical semantics on the master station side. The time validity, expected electrical direction, current actual response direction, and available reactive power margin of the target object of these old commands are collectively converted into executable constraints for the next round of AVC optimization. Therefore, communication delays, packet loss, out-of-order delivery, or inconsistent execution receipts do not remain merely as alarm information at the monitoring layer, but rather enter the processes of target object selection, regulation direction limitation, regulation amplitude reduction, and closed-loop handling action generation, thus forming a master station AVC control method for new energy access scenarios.

[0062] The present invention will now be described with reference to specific embodiments: To further illustrate how the above method suppresses the superposition of old and new commands in the same direction under communication interference conditions while still retaining the necessary voltage recovery capability, this embodiment uses a publicly available distribution network example for recalculation. The example is sourced from case33bw.m in the MATPOWER project, and can be downloaded from the following address: The file https: / / raw.githubusercontent.com / MATPOWER / matpower / master / data / case33bw.m describes it as power flow data for the Baran-Wu 33-node radial distribution system. The original data corresponds to the publicly available paper "Distribution Network Reconfiguration and Load Balancing Research" published by MEBaran and FFWu in 1989, DOI 10.1109 / 61.25627. Node loads are given in kW and kVAr in the source file, and line impedances are given in ohms, converted in the MATPOWER file according to a 12.66kV and 10MVA benchmark. The source file SHA256 used in this embodiment is B40831EEB444669AE876E2996F0DDA9F05CD83E81B314B8DFCA51E4890CCA95D. It should be noted that the publicly disclosed example provides recalcifiable basic data such as grid node load, line impedance, and voltage reference. The old AVC command delay, basic new AVC command, and constrained AVC command in this embodiment are control quantities set according to the steps of this invention and are not described as actual field measurement and scheduling records.

[0063] In this embodiment, node 18 from the publicly available example is selected as the target node where the new energy grid connection point is located, and the target object is equivalent to the new energy inverter group or dynamic reactive power compensation device connected to this node. The script first parses the node load and line impedance data in case33bw.m, and uses radial distribution network forward-backward power flow calculation to calculate the node voltage; then, it sets the old instructions and the current control quantity according to the control logic of S1 to S3. In the publicly available example, the total reactive load of the entire network is 2.30 Mvar. In this embodiment, the old reactive power increase instructions that took effect late in the previous cycle are taken as 10% of this value, i.e., 0.23 Mvar; the current cycle basic AVC same-direction increase adjustment is taken as 8% of this value, i.e., 0.184 Mvar; and the current available reactive power margin of the target object is... The value is set to 0.161 Mvar. Since the grid connection point voltage and the reactive power direction of the target object are consistent with expectations after the old instruction takes effect, and the power flow direction of the line does not change significantly, S2 obtains the directional consistency. The risk coefficient for the old instruction is 0.75. The voltage urgency is 0.514706; when the grid connection point voltage is close to the target range boundary but has not yet exceeded the limit. Taking 0.3, S3 calculates that the constrained new reactive power regulation in this round is 0.117706 Mvar.

[0064] Based on the above-mentioned publicly available calculation examples and control settings, the recalculated voltage of node 18 and the minimum voltage of the entire network are shown in Table 1 below. The results in the table show that the voltage of node 18 under the baseline state is 0.913090 pu; when the old command from the previous cycle takes effect late, the voltage of node 18 rises to 0.927543 pu; if the master station continues to issue the complete same-direction basic adjustment in the conventional manner, the voltage of node 18 further rises to 0.938564 pu; after adopting the risk constraint of this invention, the newly added adjustment in this round is reduced from 0.184 Mvar to 0.117706 Mvar, and the voltage of node 18 rises to 0.934646 pu. Compared with conventional repeated adjustment, this invention reduces the additional same-direction voltage rise by approximately 35.6% after the old command has already taken effect, while still increasing the voltage of node 18 by approximately 0.0071 pu relative to the scenario where the old command only takes effect late. This indicates that it does not simply prohibit adjustment, but rather makes a compromise between the risk of the old command and the voltage recovery requirement.

[0065] Table 1. Voltage of Node 18 and Minimum Voltage of the Entire Network

[0066] refer to Figure 2 As shown, the voltage distribution of 33 nodes under the above four scenarios is presented. This figure was obtained from the same publicly available example using the same power flow calculation script. The vertical axis represents the per-unit voltage value of the nodes, and the horizontal axis represents the node number. It can be seen that after the old command takes effect late, the voltage has already increased relative to the baseline state. Regular repeated adjustments will continue to expand the adjustment amplitude in the same direction. However, the constrained AVC adjustment curve of this invention is located between "old command takes effect late" and "regular repeated adjustments", which shows that the risk constraint of the old command generated in step S2 has entered the control quantity generation process in step S3. This embodiment also corresponds to the closed-loop handling in step S4: if the actual voltage and reactive power direction continue to be consistent within the subsequent allowed execution time window, the master station can confirm that the closed loop of this round of constrained commands is completed; if the actual direction is opposite to the expectation or key measurements are missing, the master station will switch to amplitude limiting observation, task transfer, or reissue new constrained AVC commands according to the aforementioned low consistency or missing measurement logic.

[0067] refer to Figure 3 As shown, in another aspect of the embodiments of this application, a dispatch automation master station AVC reactive power optimization control system for new energy access is also proposed, including: The instruction record construction module is used to read the operating quantity data related to the current reactive power control at the beginning of the AVC control cycle, determine the target object based on the comparison result between the operating quantity data and the AVC target voltage range, determine the target reactive power adjustment amount based on the adjustment amount required for the current voltage deviation and the available reactive power margin of the target object, generate the expected electrical change direction based on the target reactive power adjustment amount, determine the allowed execution time window of the AVC instruction based on the type of the target object and the AVC control cycle, and construct the AVC instruction status record based on the operating quantity data, the target reactive power adjustment amount, the expected electrical change direction and the allowed execution time window. The risk constraint construction module is used to read the AVC instruction status record, generate the actual electrical change direction within the current AVC control cycle, calculate the direction consistency between the actual electrical change direction and the expected electrical change direction, and generate a repeated adjustment risk coefficient based on the direction consistency, combined with the time validity status of the old instruction and the available reactive power margin of the target object. The main station generates instruction risk constraints based on the repeated adjustment risk coefficient. The control instruction construction module is used to read instruction risk constraints, obtain the basic target reactive power regulation amount according to the preset AVC voltage reactive power control logic within the current AVC control cycle, calculate the constrained target reactive power regulation amount based on the basic target reactive power regulation amount and the repeated adjustment risk coefficient, and generate constrained AVC control instructions based on the constrained target reactive power regulation amount. The optimization control module is used to calculate the electrical response consistency of the constrained AVC control command, and generate closed-loop optimization control results based on the electrical response consistency, the current voltage state of the new energy grid connection point, and the current reactive power margin of the target object.

[0068] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A reactive power optimization control method for a dispatch automation master station (AVC) oriented towards new energy access, characterized in that, include: At the start of the AVC control cycle, the operating quantity data related to the current reactive power control is read. The target object is determined based on the comparison result between the operating quantity data and the AVC target voltage range. The target reactive power adjustment amount is determined based on the adjustment amount required for the current voltage deviation and the available reactive power margin of the target object. The expected electrical change direction is generated based on the target reactive power adjustment amount. The allowed execution time window of the AVC command is determined based on the type of the target object and the AVC control cycle. The AVC command status record is constructed based on the operating quantity data, the target reactive power adjustment amount, the expected electrical change direction, and the allowed execution time window. The AVC instruction status record is read, and the actual electrical change direction is generated within the current AVC control cycle. The direction consistency between the actual electrical change direction and the expected electrical change direction is calculated. Based on the direction consistency, combined with the time validity status of the old instruction and the available reactive power margin of the target object, a repeated adjustment risk coefficient is generated. The master station generates instruction risk constraints based on the repeated adjustment risk coefficient. Read the instruction risk constraint, and within the current AVC control cycle, obtain the basic target reactive power adjustment amount according to the preset AVC voltage reactive power control logic. Calculate the constrained target reactive power adjustment amount based on the basic target reactive power adjustment amount and the repeated adjustment risk coefficient, and generate a constrained AVC control instruction based on the constrained target reactive power adjustment amount. Calculate the electrical response consistency of the constrained AVC control command, and generate closed-loop optimized control results based on the electrical response consistency, the current voltage state of the new energy grid connection point, and the current reactive power margin of the target object.

2. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 1, characterized in that, After obtaining the basic target reactive power regulation amount according to the preset AVC voltage reactive power control logic, the method further includes determining the control strategy for this round based on the constraint type. Specifically, determining the control strategy for this round based on the constraint type includes: When the constraint type is a repetitive adjustment constraint in the same direction, and the consistency between the current actual electrical change and the expected electrical change of the old instruction is greater than the threshold, the reactive power adjustment in the same direction is restricted from being issued to the same target object to suppress the superposition of new and old instructions. When the constraint type is old instruction affecting the release of constraint, the master station will restore the target object to the normal AVC regulation range and reallocate the control quantity according to the current voltage deviation of the new energy grid connection point and the current reactive power margin of the target object; When the constraint type is reverse offset constraint, the master station prioritizes maintaining the smooth movement of adjacent target objects and restricting large movements, and prioritizes allocating this round of adjustment to target objects that correspond to the voltage deviation of the current new energy grid connection point.

3. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 2, characterized in that, Before determining the control strategy for this round based on the constraint type, the process also includes: When the old instruction is within the allowed execution time window and the direction consistency is higher than the preset threshold, the constraint type is the same direction repeated adjustment constraint. When an old instruction exceeds the allowed execution time window, the constraint type is "Old Instruction Affects Constraint Removal"; When the actual electrical change direction is opposite to the expected direction, the constraint type is reverse cancellation constraint.

4. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 2, characterized in that, When the constraint type is a repetitive adjustment constraint in the same direction, and the consistency between the current actual electrical change and the expected electrical change of the old instruction is greater than a threshold, the restriction on continuing to issue reactive power adjustments in the same direction to the same target object is included to suppress the superposition of new and old instructions. When the constraint type is a repetitive adjustment constraint in the same direction and the basic target reactive power adjustment amount belongs to the restricted adjustment direction, risk reduction is performed. When the basic target reactive power adjustment is opposite to the restricted adjustment direction, the basic target reactive power adjustment is used as a correction candidate and the adjustment range is restricted.

5. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 1, characterized in that, The target object is determined based on the comparison between the operational data and the AVC target voltage range, specifically including: If the voltage at the grid connection point of the new energy source is within the AVC target voltage range and does not show a trend of approaching the boundary of the AVC target voltage range, then the current target object will be maintained. If the voltage at the new energy grid connection point is lower than or continuously close to the lower boundary of the target range, then a target object with positive reactive power support capability shall be selected first; if the current voltage at the new energy grid connection point is higher than or continuously close to the upper boundary of the target range, then a target object that can reduce reactive power support or absorb reactive power shall be selected. If the adjustability of new energy inverters and reactive power compensation devices is insufficient, then transformer tap changers should be included as the target.

6. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 1, characterized in that, The operational data includes at least: voltage at the new energy grid connection point, reactive power output of the target object, reactive power margin of the target object, and power flow trends of related lines.

7. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 1, characterized in that, The risk constraints of the instructions include the restricted target object, the restricted adjustment direction, the restricted adjustment range, and the constraint type.

8. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 1, characterized in that, The actual electrical change direction includes the actual change direction of the voltage at the new energy grid connection point, the actual change direction of the reactive power output of the target object, and the actual change direction of the power flow of related lines. The actual change direction of the voltage at the new energy grid connection point is obtained by comparing the grid connection point voltage within the observation period after the dispatch automation master station issues the command with the grid connection point voltage before the issuance. The actual change direction of the reactive power output of the target object is determined by the reactive power output change of the target object transmitted by the control interface of the substation AVC substation, substation monitoring system, or reactive power compensation device. The actual change direction of the power flow of related lines is obtained by comparing the power flow change trend of related lines in the voltage control area to which the target object belongs before and after the issuance of the command.

9. The reactive power optimization control method of the dispatch automation master station AVC for new energy access according to claim 1, characterized in that, After calculating the electrical response consistency of the constrained AVC control commands, the method further includes: When the electrical response consistency is in a high consistency state and the voltage at the new energy grid connection point recovers to the target range, the constrained AVC control command is confirmed. When the electrical response consistency is in an intermediate state, the target object is marked as a limiting call object; When the electrical response consistency is in a low consistency state and there is a risk of exceeding the limit at the grid connection point voltage, a new constrained AVC control command is generated.

10. A dispatch automation master station AVC reactive power optimization control system for new energy access, characterized in that, include: The instruction record construction module is used to read the operating quantity data related to the current reactive power control at the beginning of the AVC control cycle, determine the target object based on the comparison result between the operating quantity data and the AVC target voltage range, determine the target reactive power adjustment amount based on the adjustment amount required for the current voltage deviation and the available reactive power margin of the target object, generate the expected electrical change direction based on the target reactive power adjustment amount, determine the allowable execution time window of the AVC instruction based on the type of the target object and the AVC control cycle, and construct the AVC instruction status record based on the operating quantity data, the target reactive power adjustment amount, the expected electrical change direction and the allowable execution time window. The risk constraint construction module is used to read the AVC instruction status record, generate the actual electrical change direction within the current AVC control cycle, calculate the direction consistency between the actual electrical change direction and the expected electrical change direction, and generate a repeated adjustment risk coefficient based on the direction consistency, combined with the time validity status of the old instruction and the available reactive power margin of the target object. The main station generates instruction risk constraints based on the repeated adjustment risk coefficient. The control instruction construction module is used to read the instruction risk constraints, and within the current AVC control cycle, obtain the basic target reactive power adjustment amount according to the preset AVC voltage reactive power control logic, calculate the constrained target reactive power adjustment amount based on the basic target reactive power adjustment amount and the repeated adjustment risk coefficient, and generate constrained AVC control instructions based on the constrained target reactive power adjustment amount. The optimization control module is used to calculate the electrical response consistency of the constrained AVC control command, and generate closed-loop optimization control results based on the electrical response consistency, the current voltage state of the new energy grid connection point, and the current reactive power margin of the target object.

Images