| 引用本文: | 李生虎,齐涛,张楠,赵慧洁,胡涛.DFIG风电场经交流/柔性直流并网系统最优潮流与灵敏度分析[J].电力自动化设备,2020,40(7): |
| LI Shenghu,QI Tao,ZHANG Nan,ZHAO Huijie,HU Tao.Optimal power flow and sensitivity analysis for power system with DFIG-wind farms integrated through AC/VSC-HVDC power transmission[J].Electric Power Automation Equipment,2020,40(7): |
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| 摘要: |
| 针对经交流和柔性直流(AC/VSC-HVDC)并网的双馈感应发电机(DFIG)风电场，考虑风速波动和电压源型换流器控制方式切换，引入直流潮流控制器，以交直流网损和直流电压偏移指标最小为目标，建立计及DFIG详细结构的最优潮流(OPF)模型，从而优化DFIG和VSC-HVDC控制变量。根据OPF拉格朗日乘子，建立目标函数对DFIG与VSC-HVDC控制变量约束灵敏度的解析表达式，以量化DFIG与VSC-HVDC潮流控制能力。给出IEEE 14节点系统的计算结果，验证了所提优化模型及其灵敏度分析的有效性和应用价值。 |
| 关键词: 双馈感应发电机 风电场 柔性直流输电 直流潮流控制器 最优潮流 灵敏度分析 |
| DOI：10.16081/j.epae.202006018 |
| 分类号:TM721.1;TM614 |
| 基金项目:国家自然科学基金资助项目(51877061) |
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| Optimal power flow and sensitivity analysis for power system with DFIG-wind farms integrated through AC/VSC-HVDC power transmission |
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LI Shenghu, QI Tao, ZHANG Nan, ZHAO Huijie, HU Tao
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School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
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| Abstract: |
| Considering wind speed fluctuation and switch of VSC(Voltage-Source Converter) control mode, the DCPFC(Direct-Current Power Flow Controller) is introduced to the power system with DFIG-wind farms integrated through AC/VSC-HVDC(AC/VSC-High Voltage Direct Current). An optimal power flow model that minimizes the power loss of AC/VSC-HVDC grid and the DC voltage deviation index is developed, which includes detailed configuration of DFIG, so as to optimize the control variables of DFIG and VSC-HVDC. The sensitivities of the objective function with respect to the constraints of DFIG and VSC-HVDC are derived based on Lagrange multipliers at the optimal solution. As a result, the power flow control capability of both DFIG and VSC-HVDC is evaluated. The effectiveness and potential applications of the proposed model and the sensitiveness analysis are validated by numerical results of IEEE 14-bus system. |
| Key words: doubly-fed induction generator wind farms VSC-HVDC power transmission DCPFC optimal po-wer flow sensitivity analysis |
