【作者】 马明；

【导师】 张俊芳；

【作者基本信息】 南京理工大学 ， 电力系统及其自动化， 2007， 硕士

【摘要】 分布式电源作为传统供电方式的一种补充，在电力系统中逐渐得到广泛的应用并扮演着越来越重要的角色。论文对现在几种分布式发电技术做了介绍，并简要介绍其优缺点。分布式电源的引入，使得配电网从无源网络转变为有源网络，不可避免地对配电网运行和安全产生一系列影响，论文对其中的网络损耗问题进行了重点的研究。通过对理想和实际两个配电网模型分析，针对分布式电源的相对容量、接入位置和功率因数三个因素，讨论了分布式电源对配电网网络损耗的影响，并得出影响规律的结论。其中为适应配电网的特殊性，应用PV节点灵敏度矩阵，对传统前推回代算法进行了改进。改进后的潮流算法具有计算速度快、精度高，可以处理PV节点的优势。分布式电源的引入可能增大也可能减少系统损耗，因此需要对分布式电源合理配置。论文针对三种静态负荷模型下单支路馈线配电网，考虑接入容量和位置两个因素，提出的配置策略可以最大程度地减少网络损耗。但对于网状配电网系统，情况要更复杂。论文针对这种情况下单分布式电源的配置问题，提出了一种新的基于节点有功功率网损灵敏度配置算法：经过IEEE-6母线系统和IEEE-30母线系统仿真计算，证明了该算法正确可行。更多还原

【Abstract】 As an aid for traditional power supply, DG is widely utilized and playing a more and more important role in power system. The author classifies and discusses several popular DG techniques, whose disadvantages and advantages are presented. The introduction of DG, by which the distribution system is changed into a source owned system, may cause series of influences on distribution system operation and security. Losses problem of distribution system is addressed in this paper. Based on ideal and practical models of distribution system, the author discusses and concludes the DG influence on power losses, considering three related factors: the relative magnitude between the DG and load, the location of DG and operating condition. Additionally to fulfill the special requirement of power solution in distribution system, the back/forward sweep algorithm is improved using PV nodal sensitivity matrix. The new algorithm is tested to be fast and available to handle PV node. DG either reduces or increases system loss, so it needs to be placed correctly. On a radial feeder under three static load models, a placement method is advanced analytically to minimum the loss by optimizing the size and location of DG. The situation is complicated as the distribution system is of network structure. According to the concept of nodal active-power loss sensitivity, a new approach for single DG placement is presented and tested.更多还原