多区域互联电力系统的自适应滑模负载频率控制.pdf
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1、本文研究了一类计及电动汽车的电力系统中的负荷频率控制问题.首先,文章将电动汽车模型与传统的负载频率控制模型相结合,在未知扰动波动范围的条件下设计了自适应滑模控制律.其次,本文分别考虑了电网调频中的匹配扰动和不匹配扰动问题,并利用李亚普诺夫稳定性理论导出了匹配和不匹配条件下的系统稳定的充分条件.最后,通过两个区域电力系统的仿真结果表明,电动汽车作为电源和负载都可以提高电网的频率稳定性,所设计的控制器可以有效地调节电网的频率波动.关键词:电力系统;自适应滑模控制;电动汽车;负荷频率控制引用格式:王志鹏,陈向勇,刘华伟,等.多区域互联电力系统的自适应滑模负载频率控制.控制理论与应用,2023,40(
2、7):1252 1260DOI:10.7641/CTA.2023.20341Adaptive sliding mode load frequency control formulti-area interconnected power systemsWANG Zhi-peng1,2,CHEN Xiang-yong1,2,LIU Hua-wei1,2,LIU Xue-qiang3,QIU Jian-long1,2(1.School of Automation and Electrical Engineering,Linyi University,Linyi Shandong 276005,Chi
3、na;2.Key Laboratory of Complex Systems and Intelligent Computing in Universities of Shandong,Linyi Shandong 276005,China;3.Linyi Power Supply Company,State Grid Shandong Electric Power Company,Linyi Shandong 276005,China.)Abstract:This paper studies the load frequency control(LFC)of power system wit
4、h electric vehicle(EV).Firstly,combining the EV model with the traditional load frequency control model,an adaptive sliding mode control law is de-signed under unknown disturbance fluctuation range.Secondly,the matched and unmatched disturbances in power networkfrequency modulation are considered,an
5、d the sufficient conditions for system stability under matched and unmatched con-ditions are derived using Lyapunov stability theory.Finally,the simulation results of two regional power systems show thatelectric vehicles can improve the frequency stability of the power grid as both power source and
6、load,and the designedcontroller can effectively adjust the frequency fluctuation of the power grid.Key words:power system;adaptive sliding mode control;electric vehicles;load frequency controlCitation:WANG Zhipeng,CHEN Xiangyong,LIU Huawei,et al.Adaptive sliding mode load frequency control formulti-
7、area interconnected power systems.Control Theory&Applications,2023,40(7):1252 12601IntroductionPower systems aim to be environmentally friendly,resulting in a rapid integration of new energy sourcesandsystems12.Inthefuture,fuelvehicleswilleven-tually be replaced by electric vehicles due to the g
8、row-ing popularity and demand of electric vehicles(EVs)in the market.EVs convert chemical energy to electricenergy,and their response speed is fast 3.EVs par-ticipating in load frequency control(LFC)of tradition-al power systems can improve the stability of load fre-quency.With the maturity of the v
9、ehicle-to-grid(V2G)technology,it can be used as a distributed power supplyand load 4.In the V2G technology,EVs are regardedas power sources,providing measurement to the grid,and realizing a two-way flow of energy between theEVs and the grid.Owing to the uncertainty of new en-ergy and the limitations
10、 of new energy generation tech-nology,it is necessary to use energy storage equipmen-Received 3 May 2022;accepted 21 April 2023.Corresponding author.E-mail:.Recommened by Associate Editor:LI Shi-hua.Supported by the National Natural Science Foundation of China(62173175,61877033)and the Natural Scien
11、ce Foundation of Shandong Province(ZR2019BF045,ZR2019MF021,ZR2019QF004).No.7WANG Zhi-peng et al:Adaptive sliding mode load frequency control for multi-area interconnected power systems1253t to store the electricity generated by the new energy,and EVs have been used as energy storage equipmentto stor
12、e the electricity,significantly lowering the con-struction and operating cost of the power grid.In thefuture,EVs in power grid frequency control will be in-evitable 5.With the promotion of low-carbon environmentalprotection and the green pollution-free concept,an in-creasing number of scholars and e
13、ngineers have studiedtheloadfrequencyofacombinednewenergyandpowersystem.In this study,the LFC of power grid with EVsand the uncertain mismatch of the power grid was in-vestigated.In 6,the design of reliable LFC for uncer-tain multi-area delayed power systems was studied.As-suming that the parameter
14、uncertainty is random,a setof lines were generated by constructing an appropriateLyapunov Krasovskii functional and combined it withWirtingers inequality to guarantee the stability andextended dissipation of multi-area power systems.Insome studies,various control methods and algorithmsfor frequency
15、regulation of power system have beenproposed,such as fuzzy proportional integral deriva-tive(PID)control,particle swarm optimization(PSO),adaptive control algorithm,reinforcement learning al-gorithm and so on due to the uncertainty and random-ness of new energy sources.With the new energy wasconnect
16、ed to the traditional power system,the operationof the power system will face great challenges.In 7,an adaptive fuzzy PID controller with filter based onPSO was proposed by using a new wind power gen-eration model.Differential evolution optimization wasused to optimize the controller parameters,it s
17、ignifi-cantly increased the cost of the system.According tothe characteristics of new energy uncertainty,a non-linear dynamic recognition learning model was devel-oped.Recent studies have also shown that combiningonline reinforcement and model predictive control canimprove the learning ability of mo
18、del and provide real-time control.However,the reward function must exact-lymatchthedesiredfunction,whichaddstothedifficul-ty of its implementation 8.In 9,a scheme based onload control was proposed to control systems that do nothavesufficientcontinuouscontrollableloadsbyline-by-line method.From 10,th
19、e traditional automatic gen-eration control system model was improved by a fuzzyproportional integral(PI)approach to adaptively adjustthe PI control parameters of the controller.A decentral-ized fuzzy logic approach was proposed for wind pow-er interconnected systems to reduce the frequency de-viati
20、on and power of the connected lines 11.In 12,an adaptive control law and parameter update algorithmwere established to interconnect LFC regions based onfuzzy logic.However,the design of fuzzy control lack-s systematicness and has no definite goal.From 13,LFCwasusedtostabilizethefrequencywithinthespe
21、c-ified range in the three-area power system.The problemof the LFC for power systems with communication de-lays was solved by a dynamic output feedback schemein 14.In the case of actuator failures and communi-cation delays,the LFC of multiarea power systems wasdiscussed based on an event-triggered m
22、echanism and afault-tolerant strategy in 15.Sliding mode control(SMC)is a control approachinpowergridsthatchangestheswitchingcharacteristicsof the system structure.Compared with the abovemeth-ods,it has the characteristics of fast response and no pa-rameter interference.This property enables the sys
23、temto perform a small,high-frequency motion along thestate trajectory without interference externally and fromthe system parameters.SMC improves the robustnessof the system.SMC can be divided into the followingthree steps:1)the existence of sliding modes;2)a pointoutside the switching plane reaches
24、the switching planein a finite time;3)to ensure the stability of sliding modemovement.In 16,an LFC method for single area pow-er system based on sliding mode control was presented.For an uncertain multi-area interconnected power sys-tem,appropriate switching surfaces were constructedfor each area,an
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- 区域 电力系统 自适应 负载 频率 控制
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