摘要
在放电线圈额定负载温升试验、额定电压二次短路温升试验、额定容量放电温升试验基础上,对比了3种工况下3种规格的放电线圈绕组温升的特点。理论计算分析了短路试验、放电试验时绕组的温升情况,计算结果与试验结果相吻合。此外,文章研究了放电线圈额定容量连续放电试验时绕组温升情况。研究结果表明,放电线圈绕组的瞬态温度在连续放电试验中不断升高、上升速度快,因此,变电所VQC控制并联电容器投切时,应控制对电容器组操作时间间隔,防止因连续投切电容器,放电线圈连续放电,进而导致绕组瞬态温度过高而损坏。
The temperature rise characteristics of three types of discharge coils under three conditions are compared based on the temperature rise tests discharge coils with rated load,temperature rise test of second short-circuit of rated voltage and temperature rise test of discharge of rated power.The temperature rise situation of coils in short circuit test and discharge test is analyzed by theoretical calculation,showing that the calculation and test results are in agreement.Moreover,the temperature rise status of coils at sustaining discharge test of rated power of the discharge coil is studied in this paper,showing in the result that the transient temperature of discharge coils rises with high speed in the sustaining discharge test.Therefore,in the control of shunt capacitor switching with VQC at substation,the time interval of operation of the capacitor bank should be controlled to prevent damage of coils due to excessive high transient temperature caused by sustaining switching of capacitor and sustaining discharge of discharge coils.
出处
《电力电容器与无功补偿》
2011年第1期45-49,53,共6页
Power Capacitor & Reactive Power Compensation
关键词
电容器
放电线圈
温升试验
瞬态温升
capacitor
discharge coils
temperature rise test
transient temperature rise
