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基于电压应力分析的柔性直流换流站故障限流阻抗参数优化
作者:
作者单位:

输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市 400044

摘要:

故障限流器(FCL)能在柔性直流电网短路故障识别后快速投入限流,以降低对直流断路器(DCCB)的要求。首先,通过分析FCL的工作原理,获取故障下含FCL的柔性直流换流站等效电路;计算不同阻抗类型的FCL故障电流和电压应力,分析其随故障限流阻抗参数变化的特征,提出理想限流阻抗并分析其特征。然后,提出以DCCB分断电流和FCL成本为优化目标的限流阻抗参数优化方法。在PSCAD/EMTDC中进行仿真对比,验证了电压应力计算和优化模型的正确性。

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基金项目:

国家重点研发计划资助项目(2018YFB0904600);国家自然科学基金资助项目(51707027)。

通信作者:

作者简介:

魏能峤(1990—),男,博士研究生,主要研究方向:高压柔性直流输电。E-mail:weinengqiao@163.com
周念成(1969—),男,教授,博士生导师,主要研究方向:电力系统保护与控制、微网运行与控制。E-mail:cee_nczhou@cqu.edu.cn
罗永捷(1988—),男,通信作者,副教授,博士生导师,主要研究方向:柔性直流输电和直流电网技术。E-mail:luoyj@ cqu.edu.cn


Parameter Optimization for Fault Current Limiting Impedance of Flexible DC Converter Station Based on Voltage Stress Analysis
Author:
Affiliation:

State Key Laboratory of Power Transmission Equipment & System Security and New Technology

Abstract:

Fault current limiter (FCL) could retrain fault current after identifying the short-circuit fault of the flexible DC grid to reduce the DC circuit breaker (DCCB) requirements. By analyzing the working principle of FCL, the equivalent circuit of flexible DC converter station including FCL with a fault is obtained. For the calculation of fault current and voltage stress of FCL with different impedance types, the characteristics of fault current limiting impedance parameters are analyzed, and the ideal current limiting impedance is proposed and its characteristics are analyzed. To optimize the DCCB breaking current and FCL cost, an optimization method for current limiting impedance parameter is proposed. Based on simulation in PSCAD/EMTDC, the correctness of the voltage stress calculation and optimization model is verified.

Keywords:

Foundation:
This work is supported by National Key R&D Program of China (No. 2018YFB0904600) and National Natural Science Foundation of China (No. 51707027).
引用本文
[1]魏能峤,周念成,罗永捷,等.基于电压应力分析的柔性直流换流站故障限流阻抗参数优化[J].电力系统自动化,2020,44(5):14-22. DOI:10.7500/AEPS20190626004.
WEI Nengqiao, ZHOU Niancheng, LUO Yongjie, et al. Parameter Optimization for Fault Current Limiting Impedance of Flexible DC Converter Station Based on Voltage Stress Analysis[J]. Automation of Electric Power Systems, 2020, 44(5):14-22. DOI:10.7500/AEPS20190626004.
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  • 收稿日期:2019-06-26
  • 最后修改日期:2019-09-29
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  • 在线发布日期: 2020-03-08
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