CAJ | 학술논문

提出了长线互联电网可用输电能力(ATC)的新模型和快速求解方法.针对长线输电主要受稳定极限约束,基于功率圆推导出线路稳定阈值,有效而简洁地描述复杂稳定极限问题,从而建立了长线互联电网ATC模型.基于支路耗散功率转归分量算法,将可用输电能力模型中的稳定极限约束和线路安全约束转化为电源出力约束,使ATC模型成为一个简单的线性规划问题.运用单纯形法实现快速准确地求解.该方法完全基于电路理论,充分利用了电力系统的物理特性,弥补了传统直流潮流法只适用于线路两端相角差很小的缺陷.仿真结果表明,本文的模型和算法有效、可行.
제출료장선호련전망가용수전능력(ATC)적신모형화쾌속구해방법.침대장선수전주요수은정겁한약속,기우공솔원추도출선로은정역치,유효이간길지묘술복잡은정겁한문제,종이건립료장선호련전망ATC모형.기우지로모산공솔전귀분량산법,장가용수전능력모형중적은정겁한약속화선로안전약속전화위전원출력약속,사ATC모형성위일개간단적선성규화문제.운용단순형법실현쾌속준학지구해.해방법완전기우전로이론,충분이용료전력계통적물리특성,미보료전통직류조류법지괄용우선로량단상각차흔소적결함.방진결과표명,본문적모형화산법유효、가행.
This paper presented a new algorithm for the calculation of available transfer capability (ATC) of long transmission line interconnected power system. As the loadability of long lines is constrained by static stability limits of grid, this algorithm first deduces the line transfer stability limits in order to describe the problem of static stability limits efficiently and concisely and to set up a new ATC model of long transmission line interconnected power system. Based on the algorithm of imputation of an impedance-branch dissipation power, the static stability constraints and the line security constraints of ATC model are transferred into generator output constraints, which makes the ATC model a simple line programming problem. Through the use of simplex method, the ATC problem is solved rapidly. This new algorithm, which satisfies all circuit laws and considers the physical characteristics of the power system sufficiently, offsets the deficiency of traditional DC power flow method, which is suitable for the calculation of ATC only if the branch angle is reasonably small. Simulation results have shown that the proposed model and algorithm is effective and feasible.