10kV电缆超长距离供电的电压和无功补偿问题研究

Research on Voltage and Reactive Power Compensation of Supply Power by Super-long Distance 10kV Cable

针对10kV电缆超长距离为10kV箱式变电站负荷供电的特殊情况,分析了运行中存在的电压和无功补偿问题,得到重载情况下需要进行容性无功补偿、空载情况下不需要进行感性无功补偿的结论,并提出了在电缆线路末端补偿Q+R0/X0×P容性无功功率的最优无功补偿配置方法。应用于实际工程后证明,合理的无功功率配置可以保证10kV电缆超长距离供电的安全性和可靠性。

For the special situation of supply power by super-long distance 10 kV cable, this paper analyses the problems of voltage and reactive power compensation in operation, and it is concluded that capacitive reactive power compensation is necessary under heavy load and inductive reactive power compensalion is not necessary under no-load? and then an optimal reactive power compensation method is proposed to compensate Q+ R X, X P reactive power at the end of cable line. The research results in practical engineering shows that. reasonable reactive power compensation can ensure the security and reliability of supply power by super-long distance 10 kV cable.