基于分频段辨识的永磁直驱风电场小信号等值方法  

Small Signal Equivalence Method for PMSG Wind Farm Based on Frequency Division Identification

作　　者：梅耀丹 梁新坤 刘泳含 赵浩然 王鹏[3] 刘天成 MEI Yaodan;LIANG Xinkun;LIU Yonghan;ZHAO Haoran;WANG Peng;LIU Tiancheng(CNPC Offshore Engineering Co.,Ltd.,Beijing 100176,China;Southern Petroleum Exploration and Development Co.,Ltd.,Haikou,Hainan 570312,China;School of Electrical Engineering,Shandong University,Jinan,Shandong 250002,China)

机构地区：[1]中国石油集团海洋工程有限公司,北京100176 [2]南方石油勘探开发有限责任公司,海南海口570312 [3]山东大学电气工程学院,山东济南250002

出　　处：《广东电力》2023年第10期77-83,共7页Guangdong Electric Power

基　　金：中国石油天然气集团有限公司科学研究与技术开发项目(2022DJ5408)。

摘　　要：随着风电渗透率不断增大,电力系统稳定性分析需要精确的风电场模型。鉴于精细风电场模型的复杂性,在保留所需精度水平的同时,建立对精细模型进行合理简化的等值模型是非常必要的。以等值前后风电场奈奎斯特特性一致为目标,提出一种适用于直驱风电场的小信号等值建模方法。通过直驱风电机组等值参数计算的并联原则,初步计算等值模型参数。结合粒子群优化算法对等值前后的系统奈奎斯特曲线进行分频段辨识,提升等值模型精确度。通过直驱风电机组四机支路等值建模算例对所提方法进行等值前后对比分析,结果表明所提出的小信号等值建模方法能够较好地反映等值前后时域、频域特性,等值效果良好。With the continuous increase of wind power penetration rate,accurate wind farm models are needed for power system stability analysis.Due to the complexity of elaborate wind farm models,it is necessary to establish an equivalent model that simplifies the acceptable model reasonably while retaining the required level of accuracy.This article proposes a small signal equivalent modeling method suitable for direct-driven permanent magnetic synchronous generator(PMSG)wind farms to achieve consistent Nyquist characteristics before and after equivalence.Based on the parallel principle of calculating equivalent parameters of PMSGs,preliminary calculations of equivalent model parameters are calculated out.Meanwhile,combining the particle swarm optimization(PSO)algorithm with the Nyquist curve of the actual system before and after the equivalence,frequency division identification is carried out to improve the accuracy of the calculated equivalence model.It also conducts a comparative analysis of the proposed method before and after equivalence through an example of equivalent modeling of the four branches of a direct drive fan.The results indicate that the small signal equivalent modeling method proposed can better reflect the time-domain and frequency-domain characteristics before and after equivalence,and the equivalence effect is good.

关 键 词：风电场等值 直驱风电机组 粒子群优化算法 小信号分析 

分 类 号：TM614[电气工程—电力系统及自动化]