摘要
针对特高压大功率直流馈入上海电网后可能带来的低谷时段调峰问题,结合上海电网自身网络结构特性和电源特性,以调峰盈余为目标,考虑500k V联变潮流及机组出力上下限约束,建立了低负荷运行方式下调峰优化的线性规划模型,计算得出上海电网2014年夏季低谷最小调峰缺口。同时提出"调峰阻塞"概念,以调停机组为手段,以减少"调峰阻塞"为目标,建立了基于混合整数规划的调峰优化模型,计算得出调停机组后的系统最大调峰能力。最后提出了特高压直流参与调峰及优化直流分电比例两个外部措施,并对包括调停机组在内的三种措施进行优劣对比,给出了提高上海电网调峰性能的建议。
In view of low peak regulation problem that may arise with the feed-in of high power UHV DC into Shanghai Grid,a linear programming model for peak regulating optimization under low-load operation scenario was developed considering Shanghai grid structural and power sources features and the target of peak shaving surplus,as well as the constraints of 500 k V transformer operation ratings and generator output limits. By this model the minimum peak regulation deficiency of Shanghai grid summer low-load scenario in 2014 was calculated. The concept of ' peak regulation congestion' is proposed and a mixed integer programming model is created to deal with peak regulation capacity reduction due to units shutdown. The optimal unit shutdown schedule is provided for the system to obtain the maximum peak regulating capability. Two other external alternatives which make the UHV DC participate peak regulation and optimize the ratio of DC power shared by Shanghai Grid are discussed. The two alternatives along with the unit shutdown scheme are compared to provide guidance for grid peak regulation.
出处
《华东电力》
北大核心
2014年第12期2758-2763,共6页
East China Electric Power
关键词
调峰阻塞
特高压直流
调峰能力
线性规划
混合整数规划
peak regulation congestion
UHV DC
peak regulating capacity
linear programming
mixed integer programming
