| 引用本文: | 张保会,李光辉,王 进,郝治国,张金华,黄仁谋,王小立.（二）双馈式风电场电磁暂态等值建模研究[J].电力自动化设备,2016,36(8): |
| ZHANG Baohui,LI Guanghui,WANG Jin,HAO Zhiguo,ZHANG Jinhua,HUANG Renmou,WANG Xiaoli.Impact of wind farm integration on relay protection（2）：DFIG-based wind farm electromagnetic transient equivalent model[J].Electric Power Automation Equipment,2016,36(8): |
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| 摘要: |
| 提出建立双馈式感应发电机（DFIG）风电场多机等值方案。考虑到DFIG风机短路故障条件下投入转子Crowbar保护后，短路电流与转子实时转速相关的特点，提出以短路故障前瞬间的风机转子转速值作为DFIG风机分群的指标，以准则函数E收敛后得到的值最小为分群标准，采用K-means算法将具有相近指标的机组分到同一机群中。针对单个机群中可能存在多种型号DFIG风机的情况，采用基于容量加权的参数聚合法，计算等值风电机组转子运动方程参数、阻抗参数、变流器及其控制环节参数和箱式变压器参数。在PSCAD／EMTDC平台上建立DFIG风电场详细模型及其等值模型，仿真结果表明在相同故障条件下，风电场等值模型的故障电流能够很好地拟合详细模型。（详见2013年第33卷第2期） |
| 关键词: DFIG 风电场 模型 电磁暂态等值 继电保护 短路电流 风电 |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目（2012-AA050201） |
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| Impact of wind farm integration on relay protection（2）：DFIG-based wind farm electromagnetic transient equivalent model |
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ZHANG Baohui1, LI Guanghui1, WANG Jin1, HAO Zhiguo1, ZHANG Jinhua1, HUANG Renmou2, WANG Xiaoli1,3
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1.School of Electrical Engineering，Xi’an Jiaotong University，Xi’an 710049，China;2.Hainan Power Grid Corporation，Haikou 570100，China;3.Dispatching Center of Ningxia Electric Power Company，Yinchuan 750001，China
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| Abstract: |
| A multi-machine equivalence scheme is proposed for the electromagnetic transient numerical simulation of large-scale DFIG-based wind farm. Since the short circuit current is related to the real-time rotor speed after the rotor Crowbar protection is put into operation during the short circuit fault of DFIG -based wind generator，it is proposed that，the rotor speed just before the short circuit fault is taken as the classification index of DFIG-based wind generators. With the minimum value of the criterion function E after convergence as the criterion，the K-means clustering algorithm is applied to classify the generators with similar index. As there may be several types of DFIG-based wind generator in a group，the capacity-weighted aggregation is applied to calculate the parameters of the equivalent wind power generators，i.e. the parameters of rotor motion equation，impedance，converter and its controller，and box-type transformer. The detailed model of a DFIG-based wind farm and its equivalent model are established on PSCAD／EMTDC platform and the simulative results show that，under the same fault condition，the fault current of equivalent model fits well that of the detailed model. |
| Key words: DFIG wind farms models electromagnetic transient equivalence relay protection short circuit currents wind power |
