| 引用本文: | 刘英培,张腊,梁海平,赵玮,宋文乐,刘翔宇.适用于风电并网的VSC-HVDC系统模型预测控制[J].电力自动化设备,2019,39(6): |
| LIU Yingpei,ZHANG La,LIANG Haiping,ZHAO Wei,SONG Wenle,LIU Xiangyu.Model predictive control of VSC-HVDC system for wind power integration[J].Electric Power Automation Equipment,2019,39(6): |
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| 摘要: |
| 针对风电并网的电压源换流器高压直流输电(VSC-HVDC)系统的传统双闭环控制策略存在控制结构复杂、PI参数较多且难以整定、响应速度慢等问题，提出适用于风电并网的VSC-HVDC系统模型预测控制策略。为了提高风电场母线交流电压的控制精度，风电场侧换流器(WFVSC)采用基于优化模型预测的定交流电压控制，提出滞后补偿两步预测法，并将模型预测控制与脉宽调制(PWM)技术相结合，求取2个控制周期内调制波的最优解，然后经过调制单元生成开关信号作用于WFVSC。网侧换流器(GSVSC)采用有限控制集模型预测功率控制，基于GSVSC的离散数学模型，利用代价函数遍历寻优找出使代价函数最小的开关状态组合作用于GSVSC。基于所提模型预测控制的VSC-HVDC系统具有良好的稳态性能、动态性能和故障恢复性能，能为风电场提供稳定的交流电压。仿真结果验证了所提控制策略的可行性和有效性。 |
| 关键词: 风电并网 VSC-HVDC 模型预测控制 滞后补偿两步预测法 脉宽调制 |
| DOI：10.16081/j.issn.1006-6047.2019.06.015 |
| 分类号:TM614;TM721 |
| 基金项目:国家自然科学基金资助项目(51607069)；中央高校基本科研业务费专项资金资助项目(2016MS88,2017MS091) |
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| Model predictive control of VSC-HVDC system for wind power integration |
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LIU Yingpei1, ZHANG La1, LIANG Haiping1, ZHAO Wei2, SONG Wenle2, LIU Xiangyu2
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1.School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China;2.Cangzhou Electric Power Supply Company, State Grid Hebei Electric Power Supply Co.,Ltd.,Cangzhou 061001, China
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| Abstract: |
| The traditional double-closed-loop control strategy of VSC-HVDC(Voltage Source Converter based High Voltage Direct Current) system with wind power integration has many problems, such as complex control structure, many PI parameters which are difficult to be set, slow response speed, and so on. In order to solve the above pro-blems, a model predictive control strategy of VSC-HVDC system for wind power integration is proposed. To improve the control precision of AC voltage of wind farm bus, WFVSC(Wind Farm VSC) adopts the constant AC voltage control based on the optimized model predictive control and a two-step prediction method with time-delay compensation is proposed. The model predictive control is combined with PWM(Pulse Width Modulation) technology to obtain the optimal solution of modulating wave in two control cycles, and then the switching signal is generated by the modulating unit to act on the WFVSC. GSVSC(Grid Side VSC) adopts the finite control set model predictive power control. Based on the discrete mathematical model of GSVSC, the switching state combination which minimizes the cost function is found to act on GSVSC by cost function ergodic optimization. The VSC-HVDC system based on the proposed model predictive control has good steady-state performance, dynamic performance and fault recovery performance, and can provide stable AC voltage for wind farm. Simulative results verify the feasibility and effectiveness of the proposed control strategy. |
| Key words: wind power integration VSC-HVDC model predictive control two-step prediction method with time-delay compensation pulse width modulation |
