CAJ | 학술논문

微电网中形式各异的分布式电源使其在动态响应上体现为多时间尺度特征，其稳定性仿真算法在数值稳定性和计算效率方面需要满足更高的要求。本文提出一种基于投影积分算法的微电网稳定性仿真方法，每一个投影积分步由若干小步长积分步（内部积分器）和一个大步长积分步（外部积分器）组成，仿真步长及投影步长可根据系统快、慢动态响应的时间常数选取，可有效实现传统显式积分算法数值稳定性的提升，且为2阶精度算法。以一个低压微电网为例，通过与商业仿真软件的仿真结果进行比较，验证了算法的正确性和有效性。
미전망중형식각이적분포식전원사기재동태향응상체현위다시간척도특정，기은정성방진산법재수치은정성화계산효솔방면수요만족경고적요구。본문제출일충기우투영적분산법적미전망은정성방진방법，매일개투영적분보유약간소보장적분보（내부적분기）화일개대보장적분보（외부적분기）조성，방진보장급투영보장가근거계통쾌、만동태향응적시간상수선취，가유효실현전통현식적분산법수치은정성적제승，차위2계정도산법。이일개저압미전망위례，통과여상업방진연건적방진결과진행비교，험증료산법적정학성화유효성。
The increasing penetration of variety kinds of distributed generation (DG) results in the multiple time scale of the connected microgrid, which leads to a higher requirement on the numerical stability and calculation efficiency of the integration algorithms for microgrid stability simulation. This paper proposes an enhanced projective integration method for the stability simulation of microgrids. Each compound step of the method is combined with several small size steps (inner integrator) and a large one (outer integrator), the step sizes of which are selected based on the time constants of the fast and slow dynamic behaviors. The proposed method is consistent of order 2 and greatly improves the numerical stability of traditional numerical integration algorithms. Finally, some case studies are performed based on a low voltage microgrid and the accuracy and effectiveness of the proposed projective method is shown through comparing with the commercial software for the stability simulation of power systems.