摘要
火电厂关键负荷控制电源稳定性与机组安全运行密切相关。围绕故障案例实际,模拟得到了故障期间母线各相电压值,与实际值相吻合。基于此,分析提出了一种结合控制电源直流改造和变频器低电压穿越的解决策略,将能够有效避免厂内低电压事故引起的控制电源失电,保证机组安全运行。
The stability of control power supply for essential load in thermal power plant is closely relatedto the safe operation of the unit.In accordance with a case of fault,the voltage value of each phase issimulated and proved consistent with the actual value,and based on which,a resolution strategy is carriedout through combination of reformation on DC control power supply and cut across on low voltage ofconverter,aiming to effectively avoid the control power loss caused by the low voltage,which will furtherguarantee the normal operation of the unit.
作者
孔永科
薛立军
王立超
石山
KONG Yong-ke;XUE Li-jun;WANG Li-chao;SHI Shan(Zhuhai Power Plant, Guangdong Yuedian Group Co., Ltd., Zhuhai, Guangdong, 519050, China)
出处
《工业技术创新》
2016年第6期1155-1159,共5页
Industrial Technology Innovation
关键词
火电厂
数值模拟
直流改造
低电压穿越
Thermal Power Plant
Numerical Simulation
DC Reformation
Cut Across on Low Voltage
