The Parallel Part Design Of Unified Power Flow Controller With Dual Sources

Whether the power supply reliability is the basis of measuring electric energy fundamental indicators. Traditional focus on the power supply reliability of the power only for long time, but with the development of the digital economy, Short time power outages have getting more and more people’s attention. On some sensitive load for a short period of time may bring serious loss, Using different ring bus bar substation power supply or dual power supply can solve the short-term power outages. But the power supply voltage is different, and the line impedance is different, when we connect the two power may face so many problems. Using the UPFC to control distribution network trend. To solve the problems encountered by double power supply loop network.We chose unified power flow controller, because it can control the active power and reactive power quickly and independently. There is no coupling problem. It also can improve the stability of the system and controllability of the systemThis article first illustrates the basic principle of UPFC. When we use UPFC to achieve a variety of control functions. Then expounds the mechanism of regulating control. According to the role of UPFC parallel units using the instantaneous reactive power decoupling of the double loop control strategy, the two loops are inner current loop and outer voltage loop. Analyze and design the transfer function of the voltage loop controller and current loop controller.Established the mathematical model of UPFC parallel unit. Design UPFC parallel unit and component parameter, instructions on UPFC parallel unit parameter is set the basis for selection in detail. Based the selected parameters to simulation, the results show that the model is correct and reasonable, can meet expected requirementsChoose the TMS320LF2407A DSP as the core CPU,and design the control system, logic circuits of the pulse output and the power-protect circuits of the system. Based what we want it to be,The implementation of the control algorithm is designed program and the program flow chart. According to the functions, design control algorithm of implement procedures. Relying on the Shandong university off science and technology of intelligent power distribution network fault seamless self-healing control experimental platform, it can achieve control targets, Proved the feasibility and effectiveness of the control strategy and design device, show that the UPFC has strong control ability to trend.