【作者】 戴博；

【导师】 张建华；

【作者基本信息】 华北电力（北京）大学 ， 电力系统及其自动化， 2002， 硕士

【摘要】 改善用户供电连续性及提高系统运行可靠性是当今供电公司的主要任务。城市配电系统供电能力评估及可靠性(充裕性)评估作为其工作的一个重要方面广泛用于电力系统规划和运行。本论文根据北京城区配电供电网现状，应用模糊数学的方法，对影响配电网的供电能力的各个因素：线路负载率、电压偏移、网损和N-1校验分析进行了评估，得到了北京城区配电网的负荷分布情况和整个北京城区配电网供电能力的模糊水平。在供电能力评估的基础上，本文着重的论述了配电系统可靠性的建模和评估方法。介绍了复杂的配电系统可靠性的概念以及统计评估和预测评估的异同。根据实际配电网的运行情况，建立了分析其可靠性的统计和预测指标；讨论了适用于配电网可靠性分析的潮流计算方法；提出了双层树结构的配电网络简化方法，并应用于故障模式后果分析法中，提高了应用故障模式后果分析法分析配电网可靠性的效率。本文所提出的适于配电网络可靠性分析的新算法以实际的北京城区供电网运行数据为基础，考虑到相邻线路容量裕度限制及线路末端电压偏移的限制。该算法普遍适用于网状结线，开环运行的辐射状、具有分支线结构复杂配电网。经过实际的算例证明了其有效性。同时，本文对配电自动化在配电网中的实施以及提高供电能力对系统可靠性的影响作出了较为详细的分析。更多还原

【Abstract】 How to improve the distribution power service and enhance thereliability of the power system is a most important task for utilities.Evaluation of distribution power system caPability and reliability iswidely used in the system planning and operation. In this dissertation,the Beijing downtown area distribution system capability is evaIuatedbased on fuzzy theory according to the present condition of Beijingdistribution system. Factors considered in this dissertation affecting thecapability are including as follows: feeder load rate, voltage offset,network 1oss and N-l analysis. The load allocation in Beijingdistribution system of downtown area is got, and conclusion of thewhole fuzzy distribution caPability is reached.On the basis of the distribution caPability assessment, emphasisis fOcused on the discussion of the reliability modeling and evaluationof distribution system with series and mesh configuration employingtechniques applied in practice. The concept of complex distributionsystem is introduced and the difference between statistic evaluationand predict evaluation is compared. Indices are established for bothstatistic and predict reliability evaluation. In this thesis, load flowalgorithm for radial distribution networks is also discussed. A newalternate iterating algorithm is adopted which shows its efficiency indistribution reliability evaluation. A new algorithm of double --layertree structure to simplify the complex distribution network is proposed,which is used in FMEA to improve the efficiency of distributionreliability evaluation.The new algorithm proposed in this thesis to evaluate thedistribution system reliability is based on the practical operationcondition of Bejing downtown area distriblltion system, consideringthe constraints of neighbor feeds’ circuit caPacity margin and voltageoffset at the feeder’s terminal. This algorithm is aPplicable for complexradial networks. Its efficiency has been tested in practical distributionsystem. There is also detailed analysis in this thesis about the effect ofdistribution automation aPpliance and distribution system capability onthe reliability of distribution system.更多还原