| 引用本文: | 张仰飞,王伟胜,郝思鹏.基于测试数据的直驱永磁风电机组简化等值建模和参数辨识[J].电力自动化设备,2012,32(12): |
| ZHANG Yangfei,WANG Weisheng,HAO Sipeng.Simplified modeling and parameter identification based on test data for direct drive permanent magnet wind generator[J].Electric Power Automation Equipment,2012,32(12): |
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| 摘要: |
| 风电机组工作状态可以分为正常、故障和故障恢复过程，故障期间和故障恢复过程中变流器的控制策略会改变。分析直驱永磁风电机组电压跌落测试数据，机组外特性存在逻辑判断、限幅等强非线性环节，难以进行机理建模。对机组进行非机理建模，根据机组输出的外特性构建其简化模型，其中阻抗反映机组短路电流特性，电流源控制回路反映机组功率输出特性。电流源控制回路根据直驱永磁风电机组定功率、定电压的控制特性构建，其考虑了控制目标、时间常数、限幅以及逻辑等环节。简化模型中的参数通过电压跌落实测数据辨识获得。仿真结果表明所提模型能准确反映机组在电压跌落过程中的特性，满足暂态稳定分析的要求。 |
| 关键词: 参数辨识 永磁风电机组 模型 风电 |
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| 基金项目:国家自然科学基金资助项目（51077068）；江苏省教育厅自然科学基金资助项目（10KJB470005） |
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| Simplified modeling and parameter identification based on test data for direct drive permanent magnet wind generator |
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ZHANG Yangfei1,2, WANG Weisheng1, HAO Sipeng2
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1.Institute of New Energy，China Electric Power Research Institute，Beijing 100192，China;2.School of Electrical Power，Nanjing Institute of Technology，Nanjing 211167，China
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| Abstract: |
| Wind turbine works in three states：normal，fault and fault recovery，and the control strategy of converter changes during the fault and recovery periods. The test data of voltage dip for direct drive permanent magnet wind generator are analyzed. There are logic judgment，amplitude limit and other strong nonlinearities in the external characteristics of wind generator，which is hard to model mechanically. A simplified nonmechanical model of wind generator is constructed based on its external characteristics，in which，the impedance reflects its short circuit current characteristics and the control loop of current source reflects its power output characteristics. The control loop of current source is constructed based on the control characteristics of direct drive permanent magnet wind generator：fixed active power and voltage，with the consideration of control target，time constant，amplitude limit and logic. The parameters of the simplified model are obtained by identifying the test data of voltage dip. Simulative results show that，the proposed model accurately reflects the characteristics of wind generator during voltage dip period，satisfying the requirement of transient stability analysis. |
| Key words: parameter identification permanent magnet wind generator models wind power |
