秦山核电一线四机运行时的开关站电流分配研究

Research on Current Distribution of Switching Station for Qinshan Nuclear Power Plant Under One-line Four-unit Operating Condition

为分析秦山核电联合开关站一线四机运行时站内设备是否过载,采用理想电流源等效替代发电机和将运行的输电线路接地以构成闭合回路的方法,建立了开关站的电路仿真模型。仿真结果表明:在各支路的直流电阻不存在严重异常的情况下,仅有1回线路运行时开关站内各支路的电流都在限值以内,不影响4台机组满出力。

To check if the equipment of the joint switching station for Qinshan Nuclear Power Plant is overloaded under one-line four-unit operating condition,an electric circuit simulation model of the switching station is built by replacing generators with ideal current sources and grounding the running transmission line to form a closed loop.The simulation result shows that if the DC resistance of each branch has no serious abnormalities,the currents of all branches in the switching station are within the limits when only one line is running and it does not affect the full output of the four units.