摘要
针对风电的波动性,建立了时序多状态风电功率输出模型。将投运风险度作为运行可靠性指标计入约束条件,建立了考虑运行可靠性的含风电电力系统优化调度模型,以抑制风电并网的负面影响。为突破当前国内外在运行可靠性应用方面还没有运行可靠性标准的局限,提出了含风电电力系统优化调度新策略,即在风电并入系统时,确保每一时段的运行可靠性至少不低于不含风电时该系统的最低可靠性指标。进而,提出了风电对传统机组的"替代效应"的概念,结合所提出的优化调度模型从运行可靠性的角度,分析了"替代效应"的负面影响。在求解模型时,先通过数学变换,将非凸高次混合整数规划(MIP)模型转化为凸二次MIP模型,然后运用优化软件Cplex中的MIP优化器求解。算例结果表明提出的优化调度模型及策略充分考虑了风电对优化调度影响,求解方法有效合理。
A new wind farm model——time sequential multi-state model is presented and the fluctuation and sequential characteristics of the wind power are fully taken into account in this model.The optimal dispatch model in the wind integrated power system considering operation reliability is built,which introduces unit commitment risk as the index of the operation reliability into the constraints.Furthermore,a new dispatch strategy involved integrating wind farm is proposed.In the new dispatch strategy,the lowest index of the unit commitment risk without wind power integration is chosen as the upper limit of the operation reliability constraint in the optimal dispatch model.Then,the concept of ＂substitution effect＂ is proposed to describe the effect of the wind farm integration,so the negative effect of the wind power integration can be easily analyzed in the view of operation reliability.The optimal model is solved by the programming tool Cplex and the nonconvex high order mixed integer programming（MIP） model should be converted to convex quadratic MIP model first.The results of the test system show that optimal model and new strategy proposed are correct,effective and the effect of wind power integration on the power system dispatch can be simulated practically.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第5期58-65,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51077108)
高等学校博士学科点专项科研基金课题(20090201110017)
国家电网公司科技项目的资助
关键词
风电
优化调度
混合整数规划算法
运行可靠性
投运风险度
Wind power
optimal dispatch
mixed integer programming
operation reliability
unit commitment risk
