考虑输电线路负载率约束和全规划周期柔性成本评估的电网规划方法  

A Power Grid Planning Method Considering Transmission Line Load Rate Constraint and Flexible Cost Evaluation Within Full Planning Cycle

作　　者：孙伟卿[1] 王承民[2] 张焰[2] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海市杨浦区200093 [2]上海交通大学电子信息与电气工程学院,上海市闵行区200240

出　　处：《电网技术》2013年第10期2985-2990,共6页Power System Technology

基　　金：国家863高技术基金重大项目(2011AA05AA103)~~

摘　　要：针对现有电网规划方法对未来不确定因素适应性较差的缺点,从加强系统自身鲁棒性的角度出发,通过对线路负载率约束进行柔性化表示,控制系统中最重载线路的负载率,从而在规划过程中保留部分系统潮流输送能力,为系统预留一定的运行安全裕度和对不确定因素的适应能力。同时,通过对电网投资成本、运行成本和可靠性收益在电网全规划周期内的成本评估,提出兼顾系统经济性、安全性和可靠性的电网规划模型,并用蚁群算法求解。Garver 6节点测试系统的算例表明,提出的电网规划方法有效可行,有利于提高线路负载率分布的均匀程度,降低系统进入自组织临界状态和发生大规模连锁故障的风险,同时也是对整个电网规划周期内系统资源的综合优化。In allusion to the poor adaptability of existing power grid planning methods to future uncertain factors and to enhance the robustness of power grid its own, through the flexible expression of load rate constraint of transmission line a part of power flow transmission capability is reserved during the planning to obligate a certain security margin and adaptive capacity for uncertain factors. Meanwhile, through the evaluation on power grid investment cost, operational cost and income from reliability within full planning cycle of power grid, a power grid planning model considering grid economy, security and reliability is proposed and solved by ant colony algorithm. Results of Graver 6-bus test system show that the proposed power grid planning method is effective and feasible, and is favorable to improve the uniform degree of line load rate distribution and reduce the risk of falling into self-organized critical state or occurring large-scale cascading failure, besides using the proposed power grid planning method grid resources can be optimized comprehensively during full power grid planning cycle.

关 键 词：不确定因素 负载率约束 全规划周期柔性成本 综合优化 

分 类 号：TM721[电气工程—电力系统及自动化]