The medium voltage distribution lines with long power supply radius and broad load fluctuations, because of the larger voltage loss in the line, often result in low voltage and voltage fluctuation in the load-side, which is difficult to meet the requirements of voltage quality. The compensation of capacitor is calculated precisely under different loads, and then the maximum transmission capacity of the medium voltage radial line with the series capacitance compensation can be gotten when the voltage of the end line is stable. Simulation using Matlab/Simulink is carried out and the results verify the correctness of this calculation. The series capacitance compensator is applied to 10 kV radiation line and its normal operation and stable load-side voltage verify the practicality of series capacitance compensation.%对于供电半径大、负荷波动较大的中压配电线路,由于线路中的电压损耗较大,常常造成负荷端的电压值偏低、电压波动大,难以满足电压质量要求.通过对不同负荷情况下,对补偿电容量的精确计算,得到中压辐射线路的在电容串联补偿下稳定末端电压的最大输送容量,并通过Matlab仿真验证.在某电力公司10 kV线路接上串联电容补偿器,其正常运行并且稳定负荷侧电压验证了串联电容补偿调压的实用性.
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