摘要
重庆电网低谷时段的过剩无功致使220kV主网电压高达238kV以上,超过调度达标标准(235 4kV),并影响了下一级电网电压调整。针对此情况,通过计算、分析、试验等方法对重庆电网进行无功优化研究,提出几种方案,综合比较分析最终选取发电机进相为解决方案,并通过试验论证了发电机进相运行调控系统电压的可行性,通过对重庆电厂发电机的进相运行,使重庆220kV电网低谷电压控制在232kV以下,改善了重庆电网运行性能,加强了系统协调稳定,取得了一定的经济效益。
The surplus reactive power of Chongqing Electric Power Network causes the voltage of 220 kV main network to raise over 238 kV during low load running. The research on reactive power of the power network is presented based on analysis and experiments. Several optimizing schemes are put forward and compared. The feasibility that the system voltage could be adjusted when generator operating under excitation is demonstrated. The experiences of underexcitation operation of Chongqing power units indicate that the 220 kV system voltage is decreased to 232 kV and the running performance is improved.
出处
《电力科学与工程》
2003年第2期17-20,共4页
Electric Power Science and Engineering
关键词
电网
电力系统
无功功率
电压优化
重庆
Chongqing Power Network
voltage
reactive power optimization
generator operating under excitation
