Study of the power control ability of the distributed power flow controller

For the sake of researching the power control ability of the distributed power flow controller, we obtain the series-parallel equivalent model and present the control systems of the distributed power flow controller. The method of distributed static series compensator single phase equivalent voltage source modeling is adopted to construct the mathematic model of the distributed power flow controller, both for the fundamental harmonic and the triple frequency harmonic. The mathematic model of the DC capacitor and the triple frequency harmonic active power exchanged between the shunt and the series converter is established. The regulation scale of the maximum power of the distributed power flow controller is deduced. The series side controller is designed with the control variable of series side fundamental harmonic voltage and the control target of active or reactive circuit, and then a controller is designed with the triple frequency harmonic voltage as control variable, and the DC voltage as the control target. The dynamic and static simulation results verify the correctness of the mathematic model and the control system. This will be useful for the future research of the distributed power flow controller. This work is supported by National Natural Science Foundation of China (No. 51177114).