Voltage Stability Control Strategy of Wind-Thermal-Bundled Power Generation and DC Transmission System

doi:10.3969/j.issn.1000-7229.2020.04.015

Abstract

Abstract: In the wind-thermal-bundled power generation and DC transmission system， the voltage regulation capability of wind turbines， the reactive power-voltage characteristics of DC system and reactive power compensation equipment will affect the voltage stability of the system. To analyze the voltage stability of wind-thermal-bundled power generation and DC transmission system， it is necessary to consider the interaction among wind power， DC and AC systems comprehensively. With DC power adjustment or failure， DC system brings safety and stability problems to the whole system. This paper analyzes the causes of voltage spike after DC blocking， studies the mechanism of reactive power regulation of DC system and control for reactive power and voltage by wind power systems， and puts forward the coordinated control strategy for wind power generation and DC transmission. It takes Heilongjiang power grid as an example to simulate and verify， which has certain guiding significance for voltage stability control of wind-thermal-bundled power generation and DC transmission system.

Key words: wind-thermal-bundled system, HVDC, DC block, control strategy, voltage stability

CLC Number:

TM 72

JI Huizheng， ZHANG Fan， KANG Chunlei，HAN Minxiao. Voltage Stability Control Strategy of Wind-Thermal-Bundled Power Generation and DC Transmission System[J]. Electric Power Construction, 2020, 41(4): 126-132.

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