A voltage-reactive power control method, device and medium based on centralized optimization

By introducing voltage regulation intervals and adaptive regulation mechanisms in voltage-reactive control, the problem of complex centralized optimization and lack of adaptive regulation in the prior art is solved, and flexible adaptation of the inverter and stable regulation of the grid voltage is achieved.

CN119362492BActive Publication Date: 2025-03-21ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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Patent Information

Application Number
CN202411884578.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-03-21
Estimated Expiration
2044-12-20

AI Technical Summary

Technical Problem

The existing technology is complex in centralized optimization and has high communication requirements. The plug-in control/inverter needs to be matched with centralized optimization and local control. However, local control lacks adaptive adjustment capabilities and only relies on the initial setting curve for regulation, and cannot be adjusted according to changes in the distribution network operation.

Method used

A voltage-reactive multi-mode optimization control method based on centralized optimization is provided. By detecting the upper layer optimization instructions, setting the voltage adjustment interval and the local voltage-reactive curve, outputting the reactive power reference value of the inverter, and adjusting it according to the real-time network connection point voltage until it is stable within the set voltage adjustment interval. If the voltage fluctuates greatly, the accumulated voltage difference is zeroed and re-adjusted.

Benefits of technology

It realizes the diverse adaptation of local voltage-reactive control and upper-layer centralized optimization instructions. The local control of the inverter has adaptive adjustment capabilities, effectively suppresses grid voltage fluctuations and cross-limits, and improves the inverter's voltage support capability and grid voltage quality.

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Abstract

The present application is a voltage-reactive control method, device and medium based on centralized optimization, which belongs to the field of power system. In view of the unreasonable problem of existing optimization methods, the present application provides a voltage-reactive multi-mode optimization control method based on centralized optimization, including: detecting and identifying the instructions issued by the upper layer optimization; setting the voltage adjustment interval, and setting the local voltage-reactive curve according to the instruction result; outputting the reactive power reference value of the inverter according to the local voltage-reactive curve; regulating the reactive power of the inverter according to the reactive power reference value of the inverter, and adjusting the grid connection point voltage until it is stable; judging whether the stable grid connection point voltage is within the voltage adjustment interval; periodically detecting the grid connection point voltage value, and judging whether the detected grid connection point voltage fluctuates greatly. The present invention improves the compatibility of the inverter with the upper layer optimization, effectively suppresses the voltage fluctuation and over-limit of the power grid, and improves the voltage support capacity of the inverter, the quality of the power grid voltage, and the reliability of the power grid operation.
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