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电容补偿在配电网电压调节中的应用
张先泰1, 蔡金锭1, 丁智华2, 陈廉青2
1.福州大学 电气工程与自动化学院,福建 福州 350108;2.宁德电业局,福建 宁德 352100
摘要:
针对某些配电网负荷电压水平不满足要求和电压波动较大的问题,提出基于串联电容补偿的配电网负荷电压调节与稳定方法。通过在配电线路上串入可调电容,根据电容电压损耗与线路原电感电压损耗极性相反的特征,在负荷波动的情况下利用电容电压抵偿线路电感电压即可调节和稳定负荷侧电压。通过实时采样负荷功率,计算补偿电路的晶闸管触发角,调节电容补偿量以稳定负荷侧电压。利用Matlab的PSB模块搭建了一条带有晶闸管控制串联电容补偿的配电线路,仿真结果验证了理论分析的正确性。
关键词:  配电网  串联电容补偿  调压  晶闸管  仿真
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Application of capacitance compensation in voltageadjustment of distribution power system
ZHANG Xiantai1, CAI Jinding1, DING Zhihua2, CHEN Lianqing2
1.College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;2.Ningde Electric Power Bureau,Ningde 352100,China
Abstract:
The series capacitance compensation is applied to realize the load voltage adjustment and stabilization for those distribution power systems which have large voltage fluctuation or could not meet the requirement of load voltage level. The adjustable capacitor is inserted into the distribution line and its voltage is used to compensate the line inductor voltage when load fluctuates,which could adjust and stabilize the voltage. The load power is sampled and the thyristor trigger angle of compensation circuit is calculated in real time to adjust the level of capacitance compensation. A distribution system model with series capacitance compensation is built with PSB module in Matlab and the simulative result verifies the correctness of the theoretical analysis.
Key words:  distribution power system  series capacitance compensation  voltage adjustment  thyristor  simulation

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