恒无功功率附加控制对PSS阻尼影响分析  

Influence of Supplementary Constant Reactive Power Control on PSS Damping

作　　者：张俊峰 陈蔓[2] ZHANG Junfeng;CHEN Man(Electric Power Research Institute,Guangdong Power Grid Corporation,Guangzhou 510080,China;China Electric Power Research Institute,Wuhan 430074,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广州510080 [2]中国电力科学研究院,武汉430074

出　　处：《电力系统及其自动化学报》2019年第5期137-142,共6页Proceedings of the CSU-EPSA

摘　　要：当前电网电力系统稳定器PSS的参数整定是在励磁系统自动方式下完成的,当切换到恒无功功率附加控制后,PSS能否发挥正常的阻尼作用需要研究。将恒无功功率控制模型环扩展到Phillips-Heffron模型中,采用叠加原理的思想,逐个分析恒无功功率闭环控制中的比例P、积分I、微分D控制参数影响PSS的空间力矩矢量机理。研究表明,恒无功功率附加控制中的积分I和微分D控制参数对PSS阻尼效果影响较大,存在颠覆PSS阻尼极性的风险。结合具体案例证明了理论分析的正确性。At present,the parameter setting of a power system stabilizer(PSS)is completed in excitation system automatic mode. When switching to the supplementary constant reactive power control,it is necessary to determine whether the PSS still plays a normal damping role. In this paper,the model of constant reactive power control is extended to the Phillips-Heffron model. Based on the superposition principle,the influences of control parameters(e.g.,proportional P,integral I,and differential D)in the constant reactive power closed-loop control on the space torque vector of PSS are analyzed one by one. The research result shows that integral I and differential D have greater influences on the PSS damping effect,thus there is a risk of overturning the PSS damping polarity. In addition,the correctness of theoretical analysis is proved with the combination of a specific case study.

关 键 词：无功功率附加控制 电力系统稳定器 发电机无补偿特性 空间力矩矢量 低频振荡 

分 类 号：TM761[电气工程—电力系统及自动化] TM712