COMPARISON AND EVALUATION OF CURRENT REFERENCE GENERATION STRATEGIES FOR ACTIVE POWER FILTERS IN THREE-PHASE FOUR-WIRE SYSTEMS

For three phase four-wire active power filters （APFs）, several typical power theories and corresponding current reference generation strategies are induced, p-q, d-q, unify power factor （UPF） and instantaneous active current （IAC） methods are analyzed and compared with each other. The interpretation of active and reactive currents in non-sinusoidal and unbalanced three-phase four-wire systems is given based on the generalized instantaneous reactive power theory. The performance and the characteristic are evaluated, and the application conditions of current reference generation strategies are concluded. Simulation results under different source voltages and loads verify the evaluation result.

10kV配电线路三相导线同步提升抱杆的研发及应用

10kV配电线路中直线杆横担及绝缘子损坏十分常见,及时更换隐患设备是增加供电可靠性的重要保障手段。目前上海市电力公司以绝缘高架车带电调换法为主,但仍有许多工作环境绝缘高架车无法胜任。介绍了一种新工具,能够在任意环境中进行直线杆横担及绝缘子调换。