中文摘要：

针对电力系统动态无功支撑能力不足导致的暂态电压稳定问题,研究了发电机励磁调差系数优化对改善机组动态无功响应,提高系统暂态电压稳定性的作用。首先介绍了励磁调差系数的概念,然后分析了调差系数设置对机组自身稳定性的影响,并提出了调差系数的建议调整范围。对广东电网典型方式的算例分析结果表明,广东电网内的发电机组励磁调差系数优化后,能够有效提高故障后系统电压的恢复能力。

英文摘要：

Lack of dynamic reactive power compensation result in power system transient voltage instability.To improve the transient voltage stability,this paper presents an optimization strategy for setting the excitation system difference coefficient of the generator. The concept of the excitation system difference coefficient is introduced.Then the impacts of difference coefficients of generator excitation system on generator stability are analyzed and adjustment range is proposed. The calculation results of Guangdong province system show that the transient voltage stability level is enhanced effectively after optimize the excitation system difference coefficient.