CAJ | 학술논문

根据多馈入短路比(multi-infeed short circuit ratio， MISCR)和多直流相互作用因子(multi-infeed interaction factor，MIIF)定义，考虑电力系统元件外特性影响，建立了仅包含换流母线电压变量的直流外特性模型。在此基础上，推导出考虑直流系统影响的交直流系统潮流雅可比矩阵修改元素解析函数。研究了直流系统外特性与电压扰动之间的关系，针对传统MISCR工程计算中面临实际问题，提出考虑直流系统外特性的MISCR实用计算方法，克服了传统计算方法难以适用于复杂大电网、并同时考虑电力系统元件特性影响的困难。研究算例比较表明，直流系统外特性对MISCR计算结果影响明显。
근거다궤입단로비(multi-infeed short circuit ratio， MISCR)화다직류상호작용인자(multi-infeed interaction factor，MIIF)정의，고필전력계통원건외특성영향，건립료부포함환류모선전압변량적직류외특성모형。재차기출상，추도출고필직류계통영향적교직류계통조류아가비구진수개원소해석함수。연구료직류계통외특성여전압우동지간적관계，침대전통MISCR공정계산중면림실제문제，제출고필직류계통외특성적MISCR실용계산방법，극복료전통계산방법난이괄용우복잡대전망、병동시고필전력계통원건특성영향적곤난。연구산례비교표명，직류계통외특성대MISCR계산결과영향명현。
ABSTRACT:According to the definitions of multi-infeed short circuit ratio (MISCR) and multi-infeed interaction factor (MIIF), with the influence of external characteristics of power system elements, the DC characteristics model which only contains converter bus voltage variables was established in this paper. Based on the model, the elements in power flow Jacobian matrix of AC/DC system influenced by DC system were deduced. The relationship between voltage disturbance and DC external characteristics was studied. Then, for the traditional MISCR calculation method, considering the characteristics of DC system, the practical calculation method for MISCR was proposed, which overcomes difficulties of the traditional method applying to the large scale complex power grid and considering the influence of power system elements. Research examples show that the external characteristic of DC system has significant effect on the MISCR results.