基于MPC的主动配电网多级电压控制
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摘要
随着光伏高渗透率接入不同电压等级配电网,各电压等级配电网之间相互影响更加复杂,实现运行控制策略的经济性和安全性是一个极大的挑战。文中以中压配电网为控制对象,计及不同电压等级配电网间的交互影响,提出了基于模型预测控制(MPC)的主动配电网多级电压控制方法。中高压配电网控制中,考虑高压配电网所控制的有载调压变压器(OLTC)/并联电容器组(CB)的未来时刻动作计划,建立中高压关联模型,协调控制中压配电网连续型设备与高压配电网离散型设备;中低压配电网控制中,计及中低压配电网间的不确定性交换功率及其相互影响,构建中低压关联模型,实现中压配电网对低压配电网的支撑。最后,在Matlab中进行仿真分析,验证所提多级电压控制的可行性和有效性。
With more and more photovoltaic generations integrated into different voltage level distribution networks,the interaction between the various voltage levels of the distribution network is more complicated. It is a great challenge for the active distribution network to improve of system security and economy capacities. Considering the effect between different voltage levels,a multi-level voltage interaction control method for active distribution network based on model predictive control( MPC) is proposed in the paper. Considering on-load tap changers( OLTC) and shunt capacitor banks( CB) future-time action plan,a medium-high voltage association model is established. Coordinated control of continuous equipment in medium voltage distribution network and discrete equipment in high voltage distribution network is achieved. In the medium and low voltage distribution network,taking into account the uncertainty exchange power and their mutual influence,a low-middle voltage association model is established. It can realize the support of medium voltage distribution network to low voltage distribution network. Finally,a case study is carried out in Matlab and the results verify the effectiveness and feasibility of the proposed approach.
With more and more photovoltaic generations integrated into different voltage level distribution networks,the interaction between the various voltage levels of the distribution network is more complicated. It is a great challenge for the active distribution network to improve of system security and economy capacities. Considering the effect between different voltage levels,a multi-level voltage interaction control method for active distribution network based on model predictive control( MPC) is proposed in the paper. Considering on-load tap changers( OLTC) and shunt capacitor banks( CB) future-time action plan,a medium-high voltage association model is established. Coordinated control of continuous equipment in medium voltage distribution network and discrete equipment in high voltage distribution network is achieved. In the medium and low voltage distribution network,taking into account the uncertainty exchange power and their mutual influence,a low-middle voltage association model is established. It can realize the support of medium voltage distribution network to low voltage distribution network. Finally,a case study is carried out in Matlab and the results verify the effectiveness and feasibility of the proposed approach.
引文
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[18]张颖,季宇,唐云峰.基于MPC含分布式光伏配电网有功功率-无功功率协调控制[J].电力系统自动化,2017(21):140-146.ZHANG Ying,JI Yu,TANG Yunfeng.Coordinated control of active and reactive power for distribution network with distributed photovoltaic based on model predictive control[J].Automation of Electric Power Systems,2017,41(21):140-146.
[19]任佳依,顾伟,王勇,等.基于模型预测控制的主动配电网多时间尺度有功无功协调调度[J].中国电机工程学报,2018,38(5):1397-1407.REN Jiayi,GU Wei,WANG Yong,et al.Multi-timescale active and reactive power coordinated optimal dispatch in active distribution network based on model predictive control[J].Proceedings of the CSEE,2018,38(5):1397-1407.
[20]刘一兵,吴文传,张伯明,等.基于有功无功协调优化的主动配电网过电压预防控制方法[J].电力系统自动化,2014,38(9):184-191.LIU Yibing,WU Wenchuan,ZHANG Boming,et al.Over voltage preventive control method based on active and reactive power coordinated optimization in active distribution network[J].Automation of Electric Power System,2014,38(9):184-191.
[21]蒋建民,冯志勇,刘美仪.电力网电压无功功率自动控制系统[M].北京:辽宁科学技术出版社,2010.JIANG Jianmin,FENG Zhiyong,LIU Meiyi.Automatic voltage control in power grid[M].Beijing:Liaoning Science and Technology Press,2010.
[22]LOFBERG J Y.A toolbox for modeling and optimization in Matlab[C]∥2004 IEEE International Symposium on Computer Aided Control Systems Design.Taipei,China,2004:284-289.
[23]光伏电站接入电网技术规定:Q/GDW 617-2011[S].北京:中国电力出版社,2011.Technical rule for photovoltaic power station connected to power grid:Q/GDW 617-2011[S].Beijing:China Electric Power Press,2011.
[2]LIN Chenhui,WU Wenchuan,ZHANG Boming.Decentralized reactive power optimization method for transmission and distribution networks accommodating large-scale DG integration[J].IEEE Transactions on Sustainable Energy,2017,8(1):363-373.
[3]傅旭,苗淼,李富春,等.青海电网光伏接纳能力研究[J].陕西电力,2017,45(4):21-25.FU Xu,MIAO Miao,LI Fuchun,et al.Study on photovoltaic acceptance ability in qinghai power grid[J].Shaanxi Electric Power,2017,45(4):21-25.
[4]赵伟然,汪海蛟,李光辉,等.等分布式光伏并网电压和功率因数协调控制策略[J].电力工程技术,2017,36(6):20-26.ZHAO Weiran,WANG Haijiao,LI Guanghui,et al.Voltage and power factor coordination control for distributed photovoltaic integration[J].Electric Power Engineering Technology,2017,36(6):20-26.
[5]雷涛,曹勇,孙晓静,等.计及可控负荷及分布式电源接入的配电网网架布局规划方法[J].陕西电力,2017,45(1):17-21.LEI Tao,CAO Yong,SUN Xiaojing,et al.Planning method for distribution network with controllable load and distributed generation[J].Shaanxi Electric Power,2017,45(1):17-21.
[6]怀全,候小虎,何良策,等.一种含分布式电源的中低压配电网状态估计方法研究[J].电力系统保护与控制,2018,46(21):69-85.HUAI Quan,HOU Xiaohu,HE Liangce,et al.A method of state estimation for middle voltage and low voltage distribution network with distributed generations[J].Power System Protection and Control,2018,46(21):69-85.
[7]付英杰,汪沨,陈春,等.考虑分布式电源的配电网电压控制新方法[J].电力系统及自动化学报,2015,27(5):26-31.FU Yingjie,WANG Feng,CHEN Chun,et al.New method of voltage control considering distribution network containing distributed generation[J].Proceedings of the CSU-EPSA,2015,27(5):26-31.
[8]陈飞,刘东,陈云辉.主动配电网电压分层协调控制策略[J].电力系统自动化,2015,39(9):61-67.CHEN Fei,LIU Dong,CHEN Yunhui.Hierarchically distributed voltage control strategy for active distribution network[J].Automation of Electric Power Systems,2015,39(9):61-67.
[9]刘双,张建周,王汉林,等.考虑多无功源的光伏电站两阶段无功电压协调控制策略[J].电力系统自动化,2017,41(11):120-125.LIU Shuang,ZHANG Jianzhou,WANG Hanlin.et al.Twostage reactive power and voltage coordinated control strategy for photovoltaic station considering multiple reactive power sources[J].Automation of Electric Power Systems,2017,41(11):120-125.
[10]季玉琦,耿光飞,温渤婴,等.基于最优分割法的含DG配电网动态无功优化[J].电网技术,2017,41(8):2585-2593.JI Yuqi,GENG Guangfei,WEN Boying,et al.Dynamic reactive power optimization in distribution network with DGbased on optimal partition[J].Power System Technology,2017,41(8):2585-2593.
[11]CHEN S,HU W,SU C,et al.Optimal reactive power and voltage control in distribution networks with distributed generators by fuzzy adaptive hybrid particle swarm optimisation method[J].Iet Generation Transmission&Distribution,2015,9(11):1096-1103.
[12]KIM Y J,KIRTLEY J L,NORFORD L K.Reactive power ancillary service of synchronous DGs in coordination with voltage control devices[J].IEEE Transactions on Smart Grid,2015,8(2):515-527.
[13]蔡宇,林今,宋永华,等.基于模型预测控制的主动配电网电压控制[J].电工技术学报,2015,30(23):42-49.CAI Yu,LIN Jin,SONG Yonghua,et al.Model predictive control-based voltage control strategy in active distribution network[J].Transaction of China Electrotechnical Society,2015,30(23):42-29.
[14]VALVERDE G,CUTSEM T V.Model predictive control of voltages in active distribution networks[J].IEEE Transactions on Smart Grid,2013,4(4):2152-2161.
[15]ZHAO H,WU Q,GUO Q,et al.Coordinated voltage control of a wind farm based on model predictive control[J].IEEETransactions on Sustainable Energy,2016,7(4):1440-1451.
[16]SU Wencong,WANG Jinhui,ZHANG Kuilin,et al.Model predictive control-based power dispatch for distribution system considering plug-in electric vehicle uncertainty[J].Electric Power Systems Research,2014,106:29-35.
[17]董雷,陈卉,蒲天骄,等.基于模型预测控制的主动配电网多时间尺度动态优化调度[J].中国电机工程学报,2016,36(17):4609-4617.DONG Lei,CHEN Hui,PU Tianjia,et al.Muti-time scale dynamic optimal dispatch in active distribution network based on model predictive control[J].Proceedings of the CSEE,2016,36(17):4609-4617.
[18]张颖,季宇,唐云峰.基于MPC含分布式光伏配电网有功功率-无功功率协调控制[J].电力系统自动化,2017(21):140-146.ZHANG Ying,JI Yu,TANG Yunfeng.Coordinated control of active and reactive power for distribution network with distributed photovoltaic based on model predictive control[J].Automation of Electric Power Systems,2017,41(21):140-146.
[19]任佳依,顾伟,王勇,等.基于模型预测控制的主动配电网多时间尺度有功无功协调调度[J].中国电机工程学报,2018,38(5):1397-1407.REN Jiayi,GU Wei,WANG Yong,et al.Multi-timescale active and reactive power coordinated optimal dispatch in active distribution network based on model predictive control[J].Proceedings of the CSEE,2018,38(5):1397-1407.
[20]刘一兵,吴文传,张伯明,等.基于有功无功协调优化的主动配电网过电压预防控制方法[J].电力系统自动化,2014,38(9):184-191.LIU Yibing,WU Wenchuan,ZHANG Boming,et al.Over voltage preventive control method based on active and reactive power coordinated optimization in active distribution network[J].Automation of Electric Power System,2014,38(9):184-191.
[21]蒋建民,冯志勇,刘美仪.电力网电压无功功率自动控制系统[M].北京:辽宁科学技术出版社,2010.JIANG Jianmin,FENG Zhiyong,LIU Meiyi.Automatic voltage control in power grid[M].Beijing:Liaoning Science and Technology Press,2010.
[22]LOFBERG J Y.A toolbox for modeling and optimization in Matlab[C]∥2004 IEEE International Symposium on Computer Aided Control Systems Design.Taipei,China,2004:284-289.
[23]光伏电站接入电网技术规定:Q/GDW 617-2011[S].北京:中国电力出版社,2011.Technical rule for photovoltaic power station connected to power grid:Q/GDW 617-2011[S].Beijing:China Electric Power Press,2011.