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电网技术  2012 

三绕组变压器低压侧直供负荷对中压配电网技术经济性的影响

, PP. 129-134

Keywords: 直供负荷,三绕组变压器,中压配电网

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Abstract:

现有高、中压网络规模估算模型通常假设高压变电站主变为双绕组变压器,但220kV变电站主变多为三绕组变压器,其低压侧直供负荷会影响110kV变电站的布局和规模,为此建立了计及三绕组变压器低压侧直供负荷影响的高、中压网络规模估算模型。在此基础上,针对城市新建区和城市改造区分别分析了220/110/10(20)kV三绕组变压器低压侧直供负荷对220/110/10、220/110/20、220/20kV方案技术经济性的影响。分析结果表明,对于城市改造区,不考虑主变低压侧负荷直供情况下得到的发展20kV技术经济性最优结论,在主变低压侧有直供负荷时可能不再成立。

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