Plant A has built A 110kV total drop substation,which is powered by 110kV substation B once and again with a 110kV power supply line with a line length of about 100km. Due to the long line,and the power load of factory A is far lower than the initial estimated and planned value,the transmission line is in the state of light load operation for a long time,resulting in the"capacity rise effect"in the operation of the transmission line. Since the project has been put into operation,the 110kVtotal reduced variable power factor can not meet the requirement of power factor ≥0.9 of the national power grid,and the power quality is poor,so it has been penalized by the power grid company. This paper analyzes the reasons of low power factor caused by long lines and low load,and designs a scheme to improve the power factor to more than 0.9.
关键词
功率因数/无功补偿/长线路/低负荷
Key words
Power factor/Reactive power compensation/Long line/Low load
维普
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