CAJ | 학술논문

为改善电力系统脆弱性并服务于电网规划和系统安全运行，从系统协同效应的角度探讨连锁故障的发生机理。基于复杂网络脆弱性理论，考虑电力系统的供电能力，采用最小失负荷率建立电力系统脆弱性模型。然后基于协同效应理论，考虑 N-k 故障情况，建立电力系统线路关键性模型，以分析影响脆弱性的关键线路。通过设置允许切负荷水平值，建立电力系统过负荷情况下的连锁故障模型。采用 IEEE39算例分析验证了所提方法的有效性。分析结果表明：电网结构的薄弱点及重负荷是诱发大规模连锁故障的主要原因；高脆弱线路能够直接导致大停电事故，而低脆弱线路能够导致大规模连锁故障的发生。
위개선전력계통취약성병복무우전망규화화계통안전운행，종계통협동효응적각도탐토련쇄고장적발생궤리。기우복잡망락취약성이론，고필전력계통적공전능력，채용최소실부하솔건립전력계통취약성모형。연후기우협동효응이론，고필 N-k 고장정황，건립전력계통선로관건성모형，이분석영향취약성적관건선로。통과설치윤허절부하수평치，건립전력계통과부하정황하적련쇄고장모형。채용 IEEE39산례분석험증료소제방법적유효성。분석결과표명：전망결구적박약점급중부하시유발대규모련쇄고장적주요원인；고취약선로능구직접도치대정전사고，이저취약선로능구도치대규모련쇄고장적발생。
This paper discusses the primary causes from the point of synergistic effects to improve power system vulnerability in the power system planning and safety operation. Based on the vulnerability conception in the complex network theory the vulnerability of the power system can be evaluated by the minimum load loss rate when considering power supply ability.Consequently according to the synergistic effect theory the critical line of the power system is defined by its influence on failure set vulnerability in N-k contingencies.The cascading failure modes are proposed based on the criterion whether the acceptable load curtailment level is below a preset value.Significant conclusions are revealed by results of IEEE 39 case analysis weak points of power networks and heavy load condition are the main causes of large-scale cascading failures damaging synergistic effects can result in partial failure developed into large-scale cascading failures vulnerable lines of power systems can directly lead the partial failure to deteriorate into a large blackout while less vulnerable lines can cause a large-scale cascading failure.