中压配电网中性点接地方式决策方法研究  

Neutral point grounding mode decision algorithm for medium-voltage distribution network

作　　者：熊小伏[1,2] 刘恒勇 欧阳金鑫[1,2] 恭秀芬[1,2] 谢莹华 李婧 

机构地区：[1]重庆大学电气工程学院,重庆400044 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [3]深圳供电局有限公司,广东深圳518000

出　　处：《重庆大学学报（自然科学版）》2014年第6期1-9,共9页Journal of Chongqing University

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA05A107)

摘　　要：不同中性点接地方式各具优缺点,中压配电网中性点接地方式决策需综合考虑供电可靠性、过电压与绝缘配合、继电保护、通讯系统干扰、电气安全以及接地装置等,涉及到电网可靠性、安全性及经济性等因素。文中提出了一种综合考虑可靠性、安全性及经济性因素的中性点接地方式决策方法用于配电网的规划。方法将不同中性点接地方式下配电网的可靠性评价及安全性防护与建设运行成本分析相结合,建立了计及可靠性因素的全寿命周期成本模型作为决策目标函数,通过全寿命周期成本与可靠性协调来实现中性点接地方式的决策,算例验证了该决策方法的可行性及有效性。Different neutral point grounding modes have their own advantages and disadvantages, and the decision-making of neutral point grounding mode for medium-voltage distribution network needs to consider the power supply reliability, overvoltage and insulation coordination, relay protection, communication system interference, electrical safety and grounding device, which relate to the electric network reliability, security and economy movement aspect. A neutral point grounding mode decision method which comprehensively considers the reliability, safety and economy factors is proposed. The method combines the reliability evaluation,safety protection, construction and operation cost with the realization of distribution network for different neutral point grounding modes, and makes the optimal decision of neutral point grounding mode by calculating life cycle cost of different neutral grounding modes and coordinating the reliability index. An example is used to verify the feasibility and effectiveness of the decision method.

关 键 词：配电网 中性点接地方式 可靠性 安全性 全寿命周期成本 

分 类 号：TM727.2[电气工程—电力系统及自动化]