异步联网条件下低频振荡的电力系统稳定器优化方法

Power System Stabilizer Optimization Method Considering Low Frequency Oscillation under Asynchronous Networking Condition

为解决因电力系统动稳能力不足而导致局部电网电力外送受限问题,该文对电力系统稳定器(PSS)低频增益进行了研究,提出将系统所关注的振荡模式和本机振荡模式结合,把电力系统稳定器总体增益,按照相位补偿效果分解到角速度轴和功角轴的方法,提出了新的PSS综合增益系数计算方法,提高了系统在低频段的阻尼系数,通过实际现场试验验证了该优化方法的有效性,提高了实际系统的电力外送能力。

In order to solve the problem of local power grid transmission limitation due to insufficient power system stability.This paper studies the low frequency gain of power system stabilizer(PSS).It is proposed to combine the oscillation mode and the local oscillation mode that the system pays attention to.Method for decomposing the overall gain of a power system stabilizer into an angular velocity axis and a power angle axis according to a phase compensation effect.A new PSS comprehensive gain coefficient calculation method is proposed.ncreased damping coefficient of the system at low frequencies.The effectiveness of the optimization method is verified by actual field tests,and the power delivery capability of the actual system is improved.