整流侧直流分压器故障对受端电网影响的建模与仿真  

The modeling and simulation for the influence of HVDC voltage measuring fault on the inversion side grid

作　　者：齐一[1] 周孝法[2] 范雄斌 陈陈[1] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海市电力公司检修公司,上海200063 [3]万源市经济和信息化局,四川万源636350

出　　处：《华东电力》2012年第11期1952-1955,共4页East China Electric Power

摘　　要：某大功率直流输电工程曾几次发生因直流分压器故障导致输送功率异常波动导致受端系统直流落点附近燃气机组发生的功率转速振荡,应用EMTDC/PSCAD软件建立了直流输电系统、受端交/直流电网、整流侧直流分压器等详细模型,模拟分压器内部发生的放电故障时仿真交/直流系统的动态过程,验证了系统建模和仿真的可信度。分析表明:当整流侧直流分压器内部发生放电故障导致输送功率异常波动时,由于无功控制的延时,受端交直流系统产生无功交换,直流馈入点附近电压产生波动,邻近燃气发电机组励磁系统随之进行调节,造成机组振荡,频率为1 Hz左右。As the Ultra HVDC transmission system established, DC power declined several times abnormally, which brought about obvious effects on inversion side AC/DC grid, especially the generators nearby. In order to validate the simulation and system modeling the fault is analyzed in detail. DC system with real control blocks, as well as the inversion side 525/230 kV AC system models are built on EMTDC/PSCAD platform, and at the rectification side, the discharge transient process of DC voltage divider in measuring unit is simulated. The results of simulation is well coincide with the fault recording, which shows the accuracy of electromagnetic simulation and system modeling.

关 键 词：高压直流 电磁暂态仿真 测量用直流分压器 励磁调节 机组振荡 

分 类 号：TM74[电气工程—电力系统及自动化]