Research on Application of Controllable Phase Shifter Technology in 500kV Power Grid

Abstract

With the rapid changes in structure of grid and construction of UHV project, the grid control turn more complex. Using TCPST (controlled phase shifters) and other advanced load flow con-trol device to solve power system planning and operation problems has broad application pro-spects. In order study the influence of controlled phase shifter on the security and stability of power grid, basic principles and topologies of TCPST was studied. Steady-state model of TCPST was built in BPA software, the series and shunt transformer parameters were designed. Take Jiangsu power grid as background, TCPST was applied in two scenarios where near zone of Jinsu UHVDC and channel over the Yangtze river. Application effect of TCPST was ana-lyzed. Simulation results show: TCPST can increase section transmission capacity, solve the problem of DC power reject in small load mode also the DC power output in big load mode, reduce load losses after UHVDC bipolar blocking. For the protection of grid security and econ-omy has a positive effect.