CAJ | 학술논문

直流电压是直流电网运行中重要的状态变量。文章针对由多种微电源及就地负载组成的直流微电网系统，以之作为研究对象，利用阻抗比例判据判别直流微电网电压的稳定性。该方法通过将电源子系统的总输出阻抗对负载子系统的总输入阻抗的比值看作一个等效回路增益，再用 Nyquist稳定性判据分析系统的稳定性。仿真结果表明了直流微电网母线电压稳定性与各参数之间的关系。
직류전압시직류전망운행중중요적상태변량。문장침대유다충미전원급취지부재조성적직류미전망계통，이지작위연구대상，이용조항비례판거판별직류미전망전압적은정성。해방법통과장전원자계통적총수출조항대부재자계통적총수입조항적비치간작일개등효회로증익，재용 Nyquist은정성판거분석계통적은정성。방진결과표명료직류미전망모선전압은정성여각삼수지간적관계。
DC voltage is an important state variable in the operation of DC power grid.The research obj ect of this man-uscript is the DC microgrid which is composed of various micro powers and on-site load,and distinguishes the stability of the DC microgrid voltage .Using impedance ratio criterion,the ratio of total output impedance to the power subsystem and total input to the load subsystem is implemented as the equivalent loop gain,the stability of the system is vindicated using Nyquist stability.The simulation results show the relationship of bus voltage stability in the DC microgrid and various pa-rameters.