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电网技术  2006 

±800kV云广直流输电工程对南方电网安全稳定的影响

, PP. 5-12

Keywords: ±800,kV云广直流工程,安全稳定,南方电网,电力系统

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Abstract:

南方电网将于2010年建成投产±800kV云南—广东直流输电工程,潮流稳定计算结果表明,南方电网规划的输电网络可满足2010年贵州送广东8GW、云南送广东7.8GW的要求,并有约10%的送电裕度。通过研究电网接线、旋转备用、开机方式、云南大型水电站接入系统方式、动态无功补偿装置、直流调制、直流运行方式等因素对云南送电广东极限的影响,发现交直流系统并联运行时,影响云电外送极限的主要因素是昆明、广西电网电压支持能力不足。提出了提高云南送电广东极限的措施,包括增加楚雄换流站的电容器组2′160Mvar、增加云南东部火电开机和广东东部开机、云南大型水电分散接入电网等措施。云广直流孤岛运行方式,可提高云电外送极限3GW,建议云广直流的工程设计应能满足直流孤岛运行及交直流并联运行方式的要求。

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