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换流变压器编组和受端电网结构对其直流偏磁的影响研究 被引量:27
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作者 刘连光 闫旭东 +2 位作者 马成廉 魏恺 张燕秉 《电网技术》 EI CSCD 北大核心 2016年第1期322-327,共6页
溪洛渡—浙西±800kV直流输电试运行期间,金华换流站的换流变压器发现了严重的直流偏磁问题。针对溪洛渡—浙西UHVDC的受端电网结构和金华换流站4组换流变,建立了考虑换流变编组和受端电网结构等影响因素的直流偏磁电流计算模型,运... 溪洛渡—浙西±800kV直流输电试运行期间,金华换流站的换流变压器发现了严重的直流偏磁问题。针对溪洛渡—浙西UHVDC的受端电网结构和金华换流站4组换流变,建立了考虑换流变编组和受端电网结构等影响因素的直流偏磁电流计算模型,运用比较分析法和节点电压法计算了换流变的直流偏磁电流,研究了换流变编组和受端电网结构对换流变直流偏磁的影响。研究的结果表明:当1/2单极大地满负荷运行时换流变的直流偏磁最严重,换流站500kV母线馈线长度、回路数及所连变电站距接地极的距离是影响换流变直流偏磁严重程度的主要因素,建议在UHVDC的受端电网构成和结构的规划与设计中考虑减小流入换流变直流电流的措施。 展开更多
关键词 换流变编组 受端电网结构 直流偏磁电流
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Specific Problems in the Planning and Development of Power Network in China
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作者 张运洲 《Electricity》 2003年第4期23-26,共4页
In light of the situation that the nationwide interconnection of power networks in China in the coming years will take shape, it is imperative to emphasize the importance of setting up rational power network configura... In light of the situation that the nationwide interconnection of power networks in China in the coming years will take shape, it is imperative to emphasize the importance of setting up rational power network configuration. Combined with the characteristics of regional power networks in China, problems in network planning that need to be solved are put forward in this paper, such as, the access of power plants to grid by layers and zones, the share of external power in the load of local network, the power network configuration study in-depth in planning and design stage, and enforcement of receiving-end power network trunk etc. The background of these problems and their countermeasures are also analyzed in the paper. 展开更多
关键词 power network planning power network configuration INTERCONNECTION
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