电缆充电功率对轻负荷电网电压和无功平衡的影响分析

Analysis of the Influence of Cable Charging Power on the Voltage and Reactive Power Balance of Light-load Power Grid

相对架空线路,电缆有较大的对地电容效应,在交流电压作用下会产生较大的容性无功功率。在轻负荷方式下,线路产生的容性无功无法消纳,易造成电网电压抬升、甚至越限。以珠三角220 kV松朗站为例,分析轻负荷期间电缆高充电功率对电网的影响。

Compared with overhead lines,cables have a larger capacitance effect to the ground,and produce larger capacitive reactive power under the action of AC voltage.In the light load mode,the capacitive reactive power generated by the cables cannot be absorbed,which easily causes the grid voltage to rise or even exceed the limit.Taking 220 kV Songlang Station in the Pearl River Delta as an example,the impact of high cable charging power on the power grid during light load periods is analyzed.