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| 电网电压不平衡时电压源换流器型直流输电的负序电压补偿控制 | |
| 引用本文： | 陈海荣,张静,屠卿瑞.电网电压不平衡时电压源换流器型直流输电的负序电压补偿控制[J].高电压技术,2011,37(10). |
| 作者姓名： | 陈海荣 张静 屠卿瑞 |
| 作者单位： | 1. 金华职业技术学院,金华,321017 2. 浙江省电力调度通信中心,杭州,310000 3. 浙江大学电气工程学院,杭州,310027 |
| 基金项目： | 浙江省自然科学基金(Y106164)~~ |
| 摘 要： | 电网电压不平衡或交流系统发生故障是电压源换流器型直流输电（VSC—HVDC）实际运行时不可避免的问题。针对这一问题，提出了一种基于负序电压实时补偿的控制策略。换流站控制系统采用该策略后，能够有效地抑制交流系统电压不对称引起的负序电流，实现限流控制，避免系统短路故障引起换流装置的过电流；同时为确保电网电压不平衡或交流系统故障时控制系统能正常运行，设计了正负序分量和同步相位检测环节。基于PSCAD／EMTDC的仿真结果表明，所设计的控制系统具有良好的动稳态性能，且结构简单，具有一定的工程应用价值。 |
| 关 键 词： | 高压直流输电 电压源型换流器(VSC) 电网电压不平衡 电流矢量控制 负序电压补偿 琐相环(PLL) |
Negative Voltage Compensating Control of Voltage Source Converter Based HVDC System Under Unbalanced Grid Conditions |
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| CHEN Hai-rong,ZHANG Jing,TU Qing-rui.Negative Voltage Compensating Control of Voltage Source Converter Based HVDC System Under Unbalanced Grid Conditions[J].High Voltage Engineering,2011,37(10). | |
| Authors: | CHEN Hai-rong ZHANG Jing TU Qing-rui |
| Affiliation: | CHEN Hai-rong1,ZHANG Jing2,TU Qing-rui3(1.Jinhua Polytechnic,Jinhua 321017,China,2.Zhejiang Telecommunication Center of Power Distribution,Hangzhou 310000,3.College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China) |
| Abstract: | When HVDC system based on voltage source converter is practically in operation,voltage unbalance and fault condition in AC system are inevitable conditions.Aiming at this problem,a control strategy of negative sequence voltage compensating is proposed.When voltage source converter applying this control strategy,negative sequence current can be suppressed effectively,and current limiting control of voltage source converter can be realized,then over-current of voltage source converter caused by short circuit ... |
| Keywords: | HVDC voltage source converter(VSC) unbalanced grid condition current vector control negative voltage compensate phase lock loop(PLL) |
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