分布式电源对配网的影响分析研究综述

随着传统化石能源的日渐枯竭，新能源需求十分迫切。基于新能源及可再生能源的分布式电源（DG）不仅可以作为传统供电模式的重要补充，还将在能源综合利用上占有重要地位。大力发展以以分布式利用为主的新能源，符合国家能源战略。但随着DG在电力系统中所占比例越来越大，对传统的电力系统安全稳定提出了挑战。为研究分布式电源并网对配网影响及改进措施，文中介绍了分布式电源的概念、分类及特点，论述了DG并网对配网的影响及改进的研究现状。从分布式电源并网后对配网规划、电能质量、继电保护等方面总结了DG并网对配网的影响及其改进措施。论述了含DG的配网故障后的孤岛问题及微网的相关研究。展望了未来DG在电网中高比例发展高情况下的研究方向

Overview of the Influence of Distributed Generation on Distribution Network

With the depletion of traditional fossil energy, the demand for new energy is very urgent.Distributed power (DG) based on new energy and renewable energy can not only be an important supplement to the traditional power supply mode, but also occupy an important position in the comprehensive utilization of energy.It is in line with the national energy strategy to develop vigorously new energy with distributed utilization. However, with the increasing proportion of DG in power system, it challenges the safety and stability of traditional power system.In order to study the influence of distributed power supply grid-connected on distribution network and improvement measures, the concept, classification and characteristics of distributed power supply are introduced in this paper.The influence of DG grid-connected network on distribution network and the research status of improvement are discussed.After the distributed power supply is connected to the network, the effects of DG grid-connected network on the distribution network and its improvement measures are summarized in terms of distribution network planning, power quality and relay protection.The islanding problem after the fault of the distribution network containing DG and the related research of the microgrid are discussed.The future research direction of DG in the high proportion of power grid development is prospected.