CAJ | 학술논문

针对现有算法不能有效地对电网戴维南等值参数变化进行实时跟踪的问题，提出一种微小扰动状况下的戴维南等值参数辨识方法。该方法利用端口微小扰动信号中的暂态电量信息求解与之匹配的微分方程线性系数，然后再将微分方程线性系数与电网戴维南等值模型参数在稳态状态下关联起来，随之求出等值参数。辨识方法基于电力系统中常见的微小扰动信号辨识等值参数，以单相简单系统和3机9节点系统作为算例，通过与现有算法进行比较，验证了所提方法对戴维南等值参数进行实时跟踪辨识的可行性和有效性。
침대현유산법불능유효지대전망대유남등치삼수변화진행실시근종적문제，제출일충미소우동상황하적대유남등치삼수변식방법。해방법이용단구미소우동신호중적잠태전량신식구해여지필배적미분방정선성계수，연후재장미분방정선성계수여전망대유남등치모형삼수재은태상태하관련기래，수지구출등치삼수。변식방법기우전력계통중상견적미소우동신호변식등치삼수，이단상간단계통화3궤9절점계통작위산례，통과여현유산법진행비교，험증료소제방법대대유남등치삼수진행실시근종변식적가행성화유효성。
The identification method for Thevenin equivalent parameters under tiny disturbance conditions was proposed in consideration that the existing algorithms cannot effectively real-time track the Thevenin equivalent parameters in the power system. The equivalent parameters were identified by solving coefficients of the matching differential equation through using transient information of the tiny disturbance signals, then being correlated with the equivalent parameters under steady state. This method identifies the Thevenin equivalent parameters based on common tiny disturbance signals. Testing results on simple single phase system and 3-machine 9-node system validate the feasibility and effectiveness of the proposed method for parameters’ real-time tracking and identification in comparison with existing algorithms.