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新疆大学电气工程学院,新疆维吾尔自治区乌鲁木齐市 830047
Received:25 September 2020,
Revised:2020-10-20,
Published Online:05 January 2021,
Published:10 March 2021
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周博昊,李凤婷,尹纯亚.高压直流输电系统后续换相失败风险评估及抑制方法[J].电力系统自动化,2021,45(5):143-151.
ZHOU Bohao,LI Fengting,YIN Chunya.Risk Evaluation and Suppression Methods for Subsequent Commutation Failure of HVDC Transmission System[J].Automation of Electric Power Systems,2021,45(5):143-151.
周博昊,李凤婷,尹纯亚.高压直流输电系统后续换相失败风险评估及抑制方法[J].电力系统自动化,2021,45(5):143-151. DOI: 10.7500/AEPS20200925006.
ZHOU Bohao,LI Fengting,YIN Chunya.Risk Evaluation and Suppression Methods for Subsequent Commutation Failure of HVDC Transmission System[J].Automation of Electric Power Systems,2021,45(5):143-151. DOI: 10.7500/AEPS20200925006.
若引发首次换相失败的交流系统故障未及时清除或恢复阶段控制不当,在直流系统恢复过程中就有可能发生后续换相失败。文中基于换相电压时间面积,分析了导致后续换相失败的直接、间接影响因素,明确了后续换相失败发生机理。为定量评估系统后续换相失败风险,提出了后续换相失败风险指标(SCFRI),并提出了根据风险程度自适应调节触发角的基于SCFRI的附加控制策略。为避免附加控制调节范围受限等问题,提出了基于SCFRI的协调限流策略。两种策略相互配合有效抑制了后续换相失败的发生。以国际大电网会议(CIGRE)直流输电标准模型为测试算例,验证了所提SCFRI与抑制策略的有效性。
If the AC system fault causing the first commutation failure is not cleared or improper control is adopted during the fault recovery stage
the subsequent commutation failure may occur in the recovery process of the DC system. Based on the commutation voltage-time area
this paper analyzes the direct and indirect influencing factors leading to the subsequent commutation failure
and clarifies the mechanism of subsequent commutation failure. In order to quantitatively evaluate the risk of subsequent commutation failure
the subsequent commutation failure risk index (SCFRI) is proposed
and an additional control strategy based on SCFRI is proposed to adaptively adjust the triggering angle according to the risk degree. In order to avoid the limitation of additional control range
a coordinated current limiting strategy based on SCFRI is proposed. The two strategies cooperate with each other to effectively suppress the subsequent commutation failure. Taking the CIGRE DC transmission standard model as a testing example
the effectiveness of the proposed SCFRI and suppression strategies is verified.
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