论文部分内容阅读
针对澜沧江上游梯级水电站500kV出线线路总长度较长,充电功率较多,但水电站出线长度普遍较短的情况,提出了3种梯级电站无功配置方案。通过电力系统潮流稳定计算分析软件BPA对3种无功配置方案下水电站附近区域电网电压进行仿真计算,结果表明若仅靠常规的线路高抗配置方案将可能导致系统电压偏高需要水电站进相,若采用短线路过补偿方式则可能引起的工频谐振过电压等问题,难以满足系统调压要求。推荐的无功配置方案考虑在合适的澜沧江梯级水电站母线侧装设500kV高压电抗器,高压电抗配置补偿率合理,能够较为合理地控制系统电压。
According to the situation that the total length of 500kV outgoing line of the upstream cascade hydropower station in Lancangjiang River is long and the charging power is relatively high, but the length of outlet of hydropower station is generally short, three reactive power allocation schemes for cascaded hydropower stations are proposed. The power system stability analysis software BPA is used to simulate the grid voltage near the hydropower station under three kinds of reactive power configuration schemes. The results show that the hydropower station phase-in may occur if the conventional high-line configuration scheme will lead to high system voltage. If the short-circuit compensation method may cause over-voltage power frequency resonance and other issues, it is difficult to meet the system voltage regulator requirements. Recommended Reactive Configuration Considerations Considering that a 500kV high-voltage reactor is installed at the appropriate bus bar of the Lancang cascade hydropower station, the high-voltage reactance configuration compensation rate is reasonable and the system voltage can be controlled more reasonably.