大型发电机自并励励磁系统多功率柜自动均流控制  

Automatic current sharing control for multi power units of self-shunting excitation system for large generators

作　　者：杜乐丁[1] 黎雄[1] 孙元章[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电力自动化设备》2005年第3期5-8,共4页Electric Power Automation Equipment

摘　　要：开关电源并联系统常用的自动均流控制方法在自动电压调节器AVR(Automatic Voltage Regulator)开环模式下会大幅改变励磁电流静态值,故只能安全用于AVR闭环模式下。提出一种可在AVR开环模式下使用的均流控制器,通过重新选择平均电流法均流控制系统状态方程的输出向量,提高了平均电流法的稳定性。通过仿真实验和其他均流控制进行对比,结果表明:该控制器能降低对机端电压的静态和动态影响,并提高多功率柜励磁系统稳定性。In AVR(Automatic Voltage Regulator)open-loop mode,the common automatic current sharing control of parallel switching power supply system may change the static excitation current greatly. It can only be used safely in AVR close-loop mode. An automatic current sharing controller is provided,which can be used in AVR open-loop mode. A new set of output vectors is selected in the state equations of current sharing control system to improve the stability of average current value method. Compared with some other current sharing controllers,the simulative results indicate that the proposed controller decreases the static and dynamic influence on generator voltage and increases the stability of multi-power-unit excitation system.

关 键 词：均流 平均 并联 励磁 功率柜 

分 类 号：TM761[电气工程—电力系统及自动化]