基于特高压电网潜供电流的研究

Study on Potential Supply Current Based on UHV Electric Network

我国超高压线路一般都采用单相重合闸,以提高系统运行的稳定水平,降低单相重合闸的过电压。特高压线路也拟采用单相重合闸,但特高压线路的潜供电流大,恢复电压高,潜供电弧难以熄灭,可能影响单相重合闸的无电流间歇时间和成功率,针对此种情况,在探讨潜供电流产生机理的基础上研究了限制潜供电流和加快潜供电弧熄灭的措施。

In our country,single-phase reclosing is generally adopted in EHV lines to improve the system operation stability and reduce over-voltage of the single-phase reclosing.Single-phase reclosing is planned in UHV lines,but the potential supply current in EHV lines is high,recovery voltage is high,potential arc can hardly be quenched and it is possible to affect no-current intermittent time of the single-phase reclosing and probability of success.For this case,we develop how to limit measures of potential supply current and accelerating potentral arc extinction on the basis of disassing the mechanism by produced by potential current.