市场环境下考虑风险成本的启发式输电网规划  

Research on Transmission Network Planning Model Based on Risk Cost under Market Environment

作　　者：娄素华[1] 王亚娟[2] 卢斯煜[1] 吴耀武[1] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074 [2]湖北省电力公司,湖北武汉430077

出　　处：《中国电力》2015年第7期76-81,共6页Electric Power

基　　金：国家电网公司大电网重大专项资助项目(SGCC-MPLG026-2012);国家自然科学基金资助项目(51207062)~~

摘　　要：市场经济环境下电网公司更加重视电网投资的经济性问题。提出了一种考虑风险成本的输电网规划模型,该模型以投资等额年值、运行成本和系统运行的过负荷风险最小作为目标函数。采用N-1故障情况下的过负荷风险成本对传统规划模型中的硬性安全约束进行软化,实现了输电网的经济效益需求与用户可靠性需求的有机结合。采用强迫切负荷经济损失最小为严重度函数,建立了一种与输电网规划问题相适宜的过负荷风险评估公式。采用改进的Garve6节点系统进行了算例测试,结果分析证明了模型的合理性。Under the market economy, more attention is paid to the economic efficiency of power grid investment by the power utility company. In this paper, a novel transmission network planning model is proposed with consideration of the risk cost, in which the equivalent annual value of investment, the operating cost and the minimum overload risk of system operation are taken as the objective functions. The imperative constraint condition, which is represented by ＂N-l＂ constraint in conventional model, is replaced by the overload risk cost of power system. Accordingly, the transmission company can make a compromise between the reliability and economics. In order to obtain the overload risk cost, an overload risk evaluation formula is given by calculating the minimal the economic cost of load shedding in case of the single failure of transmission network. Case studies on a Garve 6-bus system demonstrate the effectiveness of the proposed model.

关 键 词：输电网规划 风险评估 严重度函数 过负荷风险成本 市场环境 

分 类 号：TM715[电气工程—电力系统及自动化]