CAJ | 학술논문

提出了一种基于同步电压源的不同时间尺度的分层控制策略。在一次控制中，分析了传统同步电压源控制存在的无功功率均分问题，采取增大下垂系数法提高功率均分的精度，这种方法适用于带本地和公共负载的各种拓扑结构的微电网；在二次电压和频率控制中，详细给出了下垂曲线二次调整量的计算方法，提高了系统的电压和频率质量；此外，在二次控制中，还提出了基于同步电压源的无缝切换和联络线功率控制方法，在微电网并网同期过程中能够维持各微源的功率均分关系，在微电网并网运行时能实现微电网和主网之间的联络线功率控制，并使各微源按比例均分负荷和联络线功率。最后，利用PSCAD/EMTDC仿真验证了所提出的控制策略的合理性。
제출료일충기우동보전압원적불동시간척도적분층공제책략。재일차공제중，분석료전통동보전압원공제존재적무공공솔균분문제，채취증대하수계수법제고공솔균분적정도，저충방법괄용우대본지화공공부재적각충탁복결구적미전망；재이차전압화빈솔공제중，상세급출료하수곡선이차조정량적계산방법，제고료계통적전압화빈솔질량；차외，재이차공제중，환제출료기우동보전압원적무봉절환화련락선공솔공제방법，재미전망병망동기과정중능구유지각미원적공솔균분관계，재미전망병망운행시능실현미전망화주망지간적련락선공솔공제，병사각미원안비례균분부하화련락선공솔。최후，이용PSCAD/EMTDC방진험증료소제출적공제책략적합이성。
A new hierarchical control strategy for the microgrid based on the synchronous voltage source converter on different time scales is proposed.In the primary control,the reactive power sharing problem of conventional synchronous voltage source converter control is analyzed.And the method of increasing the droop coefficient is adopted to improve the accuracy of power sharing.This method is suitable for the microgrid with various topologies involved in the local and public load.In the secondary voltage and frequency control,the calculating method of the droop curve adj ustment in the secondary control is elaborated in detail,improving the voltage and frequency quality of the power system.In addition,the seamless transition control between interconnection and islanding mode and the tie-line power control between microgrid and main grid are proposed in the secondary control.And power sharing can be maintained in mode transition while the tie-line power can be controlled in the interconnection mode.Finally,the rationality of the proposed control strategy is verified by simulation in PSCAD/EMTDC software environment.