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电网技术  2014 

特高压交流输电系统工频过电压差异性研究

DOI: 10.13335/j.1000-3673.pst.2014.07.008, PP. 1765-1771

Keywords: 特高压交流输电,工频过电压,差异性,网架结构,线路类型,串联补偿,开关站

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Abstract:

根据特高压电网特点,综合考虑系统结构、电源容量、输电潮流、线路参数、高抗补偿、串联补偿及线路开关站等诸多因素,研究了特高压交流输电系统工频过电压差异性。研究结果表明单回、同塔双回及单/双回混合3种架设方式的线路,单相接地甩负荷时变电站线路侧工频过电压存在差异,同塔双回架设时过电压水平最低,单/双回混合架设时过电压水平与混合比例有关。厂对网特高压同塔双回输电系统送电距离在300km以内,变电站母线侧和线路侧工频过电压水平一般不超1.2pu和1.3pu;300’600km内,过电压水平一般不超1.3pu和1.5pu。网对网特高压同塔双回输电系统过电压水平一般比厂对网结构要低,送电距离在400km

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