调速器附加控制对孤立电网频率稳定的作用

摘要

Simple frequency feedback control is unable to balance the power,leaving the system frequency vulnerable to large offset and surging.Although power-frequency electric-hydraulic governor can control the power,it has adverse effect on primary frequency modulation.Therefore,this paper introduces the additional control of speed governor： with power deviation as feedback,three additional controllers have been designed — the proportion type,optimal PID type,and fuzzy type.An isolated grid simulation verifies the effect of the three types of additional speed control on the isolated grid.%单纯的频率反馈控制无法及时进行功率平衡,易使系统频率发生较大偏移和振荡;功频电液调速器虽然能够对功率进行控制,但对一次调频却有反作用。针对上述问题介绍了调速附加控制,将功率偏差作为反馈量,设计了包括比例式、最优PID式、模糊式3种附加控制器,通过孤立电网的仿真验证了这3种调速附加控制在孤网中的效果。