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基于电力系统电压调节器(PSVR)控制原理,分析了PSVR对发电机升压变压器阻抗的补偿作用,给出了PSVR与自动无功电压控制的配合关系。在紧水滩水电厂发电机励磁调节器改造中首次实现了PSVR功能,给出了动模试验和现场试验结果。试验表明:PSVR能提高发电机无功响应速度,使暂态电压恢复更快,尤其在系统故障情况下,PSVR能充分利用发电机潜在的无功容量,提高机组对电力系统的动态无功支撑力度。
Based on the control principle of PSVR, the compensation effect of PSVR on the impedance of generator step-up transformer is analyzed, and the cooperation between PSVR and automatic reactive power voltage control is given. The PSVR function was first realized in the generator excitation regulator of Jishuitan Hydropower Plant, and the results of dynamic mode test and field test were given. The experimental results show that PSVR can improve the reactive power response and make the transient voltage recover faster. Especially in the case of system failure, PSVR can make full use of the generator’s potential reactive capacity and improve the unit’s dynamic and reactive power support Strength.