±800 kV换流站阀组触发角差异原因分析

Cause analysis and improvement measures of valve group trigger angle's difference in the ±800 kV Puer converter station

介绍某±800 kV换流站在无接地极运行期间,出现极2高低段阀组触发角差异较大情况,触发角差异较大情况导致直流电压出现异常,通过录波对直流运行参量的分析,以直流输电理论计算方法为基础,通过普侨和楚穗数据分析,并通过统计学方式进行多组数据对比,分析普侨直流在无接地极运行期间极2高低段阀组触发角差异较大原因为UdH和UdM存在异常,并以结论特点为基础,给出测量系统是否应该切换,以及是否能够继续运行的意见,减少异常情况的危害。

During the operation of the pole without ground pole, there is a great difference in the trigger angle of the P2G1 and P2G2 in the 800 kV pu’er converter station.DC voltage anomaly caused by different trigger angles. By the fault recording, it analysis of the DC operating parameters, and it is based on the direct current transmission theory calculation method .Through conpare Puqiao with Chusui project’s the data and Statistical analysis, it find the reason that UdH and UdM are abnormal, and it causes the difference between the trigger angle of P2G1 and P2G2 during the pole without ground pole operation.Based on the conclusion,it gives the opinion whether the measurement system should be switched and whether it can run continuously,and it reducing the harm of abnormal conditions.