| 引用本文: | 刘其辉,毛未,高瑜.提升无功调节能力的双馈式风力发电机转速变模式控制策略[J].电力自动化设备,2018,(9): |
| LIU Qihui,MAO Wei,GAO Yu.Variant mode control strategy of rotor speed for DFIG in promoting reactive power adjustment ability[J].Electric Power Automation Equipment,2018,(9): |
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| 摘要: |
| 分散式风电机组接入引起的配电网无功潮流变化易导致配电网出现电压偏差，由于配电网自身无功电压调节能力较弱，及时恢复母线电压到正常水平成为分散式风电机组的重要调节任务。提出一种以暂时牺牲最大风能追踪为代价的双馈式风电机组转速变模式控制策略。首先，以最大限度提高机组无功出力极限作为控制目标，寻求分散式风电机组向电网输送的无功功率最大值与风速、发电机转速间的关系，得到能使机组无功出力达到最大的发电机转速指令值；然后，根据控制目标及其他限制条件确定风电机组内部的无功分配方案；最后，结合传统控制算法制定双馈风力发电机转速变模式控制策略。PSCAD的仿真结果验证了所提控制策略的有效性。 |
| 关键词: 风电 双馈式风力发电机 转速控制 无功功率 最大化 |
| DOI：10.16081/j.issn.1006-6047.2018.09.013 |
| 分类号:TM614 |
| 基金项目: |
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| Variant mode control strategy of rotor speed for DFIG in promoting reactive power adjustment ability |
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LIU Qihui, MAO Wei, GAO Yu
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State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
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| Abstract: |
| The reactive power flow change of distribution network brought by the access of dispersed wind turbines may easily cause the voltage deviation, due to the weak reactive power and voltage adjustment ability of distribution network itself, it has become an important adjustment task for the dispersed wind turbines to restore the bus voltage to normal level in time. A variant mode control strategy of rotor speed for DFIG(Doubly-Fed Induction Generator) is proposed at the cost of temporary sacrifice of maximum wind power tracking. Firstly, taking the maximum reactive power limits of the units as the control objective, the relationship among the maximum reactive power transported to the power grid by the dispersed wind turbines, the wind speed and the rotor speed of the generators is searched to obtain the rotor speed instruction value. Then the reactive power allocation scheme among the wind turbines is determined according to the control objective and the other constraints. Finally, the control strategy is made with the combination of the traditional control algorithms. The simulative results of PSCAD verify the effectiveness of the proposed control strategy. |
| Key words: wind power DFIG rotor speed control reactive power maximization |
