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时间:2020-03-28
《基于改进对偶分解的智能电网快速实时定价方法.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第40卷第21期电力系统保护与控制Vl01.40NO.212012年11月1日PowerSystemProtectionandControlNOV.1,2012基于改进对偶分解的智能电网快速实时定价方法徐伟强,冯兆丽,黄炯,俞晴里,汪亚明,茅佳佳(浙江理工大学信息学院,浙江杭州310018)摘要:实时电价是需求侧管理策略的重要手段,是解决智能电网供需平衡的理想需求响应机制,能起到削峰填谷的作用。为此,为智能电网设计了一种分布式实时电价算法:基于改进对偶分解的近端中心算法,求解用户总效用与电能供应商成本之差最大的优化问题。在此算法中,对偶问题的拉格朗日乘子即
2、为实时电价,通过迭代更新拉格朗日乘子,形成电能供应商的实时电价与用户的实时能耗水平之间的互动,算法最终为每个用户找到最优的能耗水平(即用户的总效用最大化),同时使得电能供应商的成本最小化。所提算法既保留了问题的可分离性,又加快了收敛速度,克服了基于对偶分解的次梯度法求解该优化问题在用户规模较大时收敛慢甚至不收敛的缺点。仿真结果充分表明了所提算法具有快速收敛的特性。关键词:智能电网;需求侧管JE;削峰填谷;实时定价;次梯度算法;近端中心算法Fastreal-timepricingmethodbasedonimproveddualdecompositionfo
3、rsmartgridXUWei—qiang,FENGZhao—li,HUANGJiong,YUQing-Ii,WANGYa-ming,MAOJia-jia(SchoolofInformationScienceandTechnology,ZhejiangSci—TechUniversity,Hangzhou310018,China)Abstract:Real-timepricingschemeisanimportantmeansofdemandsidemanagementstrategiesandisanidealdemandresponsemechanis
4、mtoachievethesupplyanddemandbalanceinsmartgrid.Itcanbringoutpeakclippingandvalleyfilling.Thus,weproposeadistributedreal—timepricingalgorithmforthesmartgrid,thatis,proximalcenteralgorithmbasedonanimproveddualdecomposition,whichCansolvetheoptimizationproblemthatmaximizesthediference
5、betweentheutilitiesofallusers’andthecostoftheenergyprovider.Inthealgorithm,Lagrangianmultiplierofthedualproblemistheenergyprice.Throughupdatingthereal—timepricingtheinteractionsareactivatedbetweenreal-timepricingoftheenergyproviderandreal-timeenergyconsumptionofusers.Thealgorithmf
6、indstheoptimalenergyconsumptionlevelsforeachuser(themaximizationoftheusers’utilities),andmeanwhiletheminimumofthecostfortheenergyprovider.Itnotonlypreservestheseparabilityoftheproblembutalsoacceleratestheconvergencerate.Whenthenetworksystemislarge,thisalgorithmovercomestheweakness
7、ofthesubgradientalgorithmbasedondualdecomposition,whichisconvergentslowlyorevennot.Thesimulationresultstestifythequalityoffastconvergencefortheproposedalgorithm.ThisworkissupportedbyNationalNaturalScienceFoundationofChina(No.60702081andNo.61002016);theKeyProjectofChineseMinistryof
8、Education(No.212066);TheNaturalSc
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