电厂侧自动电压控制系统电压控制策略的改进  

Improvement on Voltage Control Strategy Used in Automatic Voltage Control System of Power Plant

作　　者：李志恒[1] 付红军[1] 孙建华[1] 胡扬宇[1] 孙冉[1] 张希全[1] 

机构地区：[1]河南省电力公司,河南省郑州市450052

出　　处：《电力系统自动化》2011年第9期95-99,共5页Automation of Electric Power Systems

摘　　要：自动电压控制(AVC)系统是提高电压管理水平、降低网损、保证系统安全稳定运行的重要手段。针对发电系统并网方式变化可能导致电压大幅波动的问题,提出了一种新的基于Boltzmann公式的自适应变步长电压控制方法,该方法根据目标电压与实际电压差值采用快速逼近的办法实现电压跟踪调节功能。从仿真计算结果可以看出,该方法兼备了电压调节的平滑性和稳定性,具备一定的纠错功能,可有效防止由于系统阻抗变化导致的电压波动事故的发生,避免了对发电设备的损害,提高了系统的安全稳定水平。The automatic voltage control（AVC） system is an important tool for improving the voltage management level,reducing network loss,and ensuring secure and stable operation of power system.To resolve the problem of great voltage fluctuation due to changes of the grid connection manner,a new adaptive variable step voltage control method based on the Boltzmann probability distribution formula is proposed,in which a fast approaching method is adopted according to the difference between the target and actual voltage to perform voltage regulation function.Simulation results show that with the proposed control method,the voltage is smooth and stable,the voltage error can be corrected to some extent,and the voltage fluctuation due to system impedance changes can be effectively prevented,thus avoiding the damage to the power equipment and improving the system＇s voltage stability level.

关 键 词：自动电压控制 系统阻抗 控制策略 Boltzmann公式 

分 类 号：TM761[电气工程—电力系统及自动化]