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智 能 电 气 技 术 与 安 全                                                              基 础 研 究



                            考虑经济性与可靠性的煤层气微电网运行优化技术研究




                                                     李岩，康忠健

                                （中国石油大学（华东）电气工程系，山东省青岛市，266580）


               摘要：配电网网架结构优化规划是在已确定配电网络中变电站的布点及其用电负荷的情况下，求解配
               电线路的拓扑结构和线型，使网络在保证供电质量的前提下，线路投资建设费用最小。某煤层气微电
               网的线路结构已基本确定，增减线路难度较大，不符合实际，所以只在现有网架结构的基础上进行运
               行方式的优化，降低网络损耗和提高可靠性。在潮流分析基础上，以系统网损成本和系统停电损失费
               用为综合优化目标函数，以配电网潮流方程为等式约束，以网络连通性、辐射性、线路传输功率限制
               和电压限制为不等式约束，建立煤层气微电网配网运行优化模型。利用电力系统动态模拟软件的开关
               优化功能对模型进行优化，给出优化方案，并对优化前后网损和可靠性做对比分析，证明优化方案的
               有效性。
               关键词：煤层气微电网；运行优化；网损；可靠性指标


                          Study on Operation Optimization Technology of Coalbed Methane Micro – grid
                                            Based on Economy and Reliability
                                                    Li Yan, Kang Zhongjian
                    (Department of electrical engineering, China University of Petroleum (East China),
                                                  Qingdao 266580, China)

               Abstract: Distribution network grid structure optimization is to solve the distribution line
               topology and linear, while the substation distribution point and its electricity load case
               are determined, so that the line investment and construction costs can be the least under
               the premise of the quality of power supply. The construction of a coalbed methane microgrid
               has been basically determined. The increase and decrease of the line is difficult and
               unrealistic. Therefore, only the operation mode is optimized on the basis of the existing
               grid structure, which reduces the network loss and improves the reliability. The optimization
               model of distribution network structure of coalbed methane microgrid is established，based
               on the analysis of the current flow, the network loss and the system power loss are combined
               to serve as the optimization objective function. The power flow equation is equality
               constrained, and the network connectivity, radiation, line transmission power limit and
               voltage limit are inequality constrained. The optimization scheme of the model is given by
               using the switching optimization function of the dynamic simulation software. The
               effectiveness of the optimization scheme is proved by comparing the network loss and
               reliability before and after the optimization.
               Keywords: Coalbed methane microgrid; operation optimization; network loss; reliability
               index
               0 引言

                   当前全球能源日益紧缺的背景下，作为大电网的有效补充和分布式能源的有效利用形式，微电网
               已引起世界各国的广泛关注和重视，微电网的发展可以提高系统运行的效率，降低发电成本，节能减
               排等 。由于微电网采用了先进的现代电力技术，能够独立可控运行，减少了供电区域对大电网的依
                    [1]
               赖性，在主电网受到大的故障甚至崩溃时供电范围内的重要负载仍然能够连续供电，这对保证生产稳
                                                       [2]
               定、人民生活和国家安全有很大的战略意义 。
                   煤层气田非常规资源勘探开发是中国石化上游板块新建产能的重要战略举措。该工程具有起点
               高、技术含量高、开发投入大、地形地貌复杂、生产环境差、施工难度大等特点，对供配电系统安全
               可靠性要求极高。研究开发煤层气田微电网运行优化技术，对提高煤层气田微电网的稳定性和可靠性、
               降低网络损耗有非常重要的意义。


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