Power system control method based on reactive power support capability commutation failure prediction

Abstract

The invention belongs to the field of power system control, and particularly relates to a power system control method based on reactive power support capability commutation failure prediction. According to the method, the reactive compensation capability of each loop is considered during commutation failure prediction control, and the voltage support capability of each loop is reflected in parameter setting of commutation failure prediction control. A commutation failure voltage drop setting value is corrected based on reactive power compensation, the commutation failure risk of each loop canbe effectively balanced, reactive power absorbed by a direct current system after an inversion side arc extinguishing angle is increased can be reduced, the reactive power is more suitable for a lineoperation state, the commutation failure risk can be more rapidly and effectively reduced when a fault occurs. And the ripple coefficient of reactive power of each direct-current loop is reduced. Therefore, by adopting the power system control method provided by the invention, the reactive power change of the line is smoother, the burden on the voltage caused by reactive power impact brought by commutation failure prediction control of the power system is reduced, and the operation of the power system is safer and more stable.

Description

technical field [0001] The invention belongs to the field of power system control, in particular to a power system control method based on reactive power support capability commutation failure prediction. Background technique [0002] my country is a country with a serious mismatch between power load and power production. With the continuous innovation and progress of my country's power technology, the advantages of long-distance high-voltage DC transmission are gradually emerging, and the power system has changed from an AC interconnected system to an AC-DC hybrid system. , my country has built the world's largest AC-DC hybrid system. However, when the AC measurement fails or experiences large disturbances, commutation failures will inevitably occur on the inverter side of traditional HVDC transmission, especially when multi-circuit DC projects are fed into the AC system, a more complex system is formed, which affects the power grid. The safe operation of the system has bro...

AI Technical Summary

Problems solved by technology

However, as a commutation predictive control method in the optimization of DC system control and protection, there is a complex coupling relationship in the multi-circuit DC project feeding into the AC grid. If only a single-circuit DC line is considered, it will cause the interaction of multiple DC lines. Therefore, It is urgent to optimize the commutation failure prediction control method for multi-channel DC projects fed into the AC grid

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