直驱风电场单机等值模型下次/超同步振荡模式特征的准确度分析与评价  

Accuracy Analysis and Evaluation of Sub/Super-Synchronous Oscillation Mode Characteristics of PMSG-Based Wind Farm Single-Machine Equivalent Models

作　　者：郭孟杰 杜文娟 王海风 GUO Mengjie;DU Wenjuan;WANG Haifeng(School of Electric Engineering,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]四川大学电气工程学院,四川成都610065

出　　处：《电网与清洁能源》2024年第9期105-113,共9页Power System and Clean Energy

基　　金：国家自然科学基金资助项目(52077144)。

摘　　要：由于详细模型的复杂性,并网风电场稳定性分析通常采用单机等值模型(SEM)。然而,SEM对于并网风电场系统的小干扰稳定性分析的适用性仍然不确定。提出了从数值和趋势两方面综合评价的方法比较等值前后振荡模式特征的准确度,分析说明了SEM的充分性。通过两种常见的单机等值方法对并网风电场进行单机等值建模;研究了在永磁同步发电机(PMSG)参数以及风电场结构变化的条件下单机等值模型与全阶模型次同步振荡模式的准确度。结果表明,单机等值会降低小干扰振荡模式的准确度,不同等值方法的适用场景不同。Due to the complexity of detailed modeling,the stability analysis of grid-connected wind farms usually adopts the single-machine equivalent model(SEM).However,the applicability of SEM for small disturbance stability analysis of grid-connected wind farm systems is still uncertain.Therefore,this paper proposes a comprehensive evaluation method from both numerical and trend aspects to compare the accuracy of the oscillation pattern characteristics before and after the equipartition,and analytically illustrates the adequacy of SEM.First,the grid-connected wind farms are modeled with two common single-machine equivalence methods for single-machine equivalence;second,the accuracy of the single-machine-equivalent model and the full-order model subsynchronous oscillation pattern of the wind farm under the conditions of permanent magnet synchronous generator(PMSG)parameters and the variation of the wind farm structure is investigated.The results show that the single-machine equivalence reduces the accuracy of the sub-synchronous oscillation mode,and the applicable scenarios of different equivalence methods are different.

关 键 词：等值准确度 风电场单机等值 次同步振荡 数值与趋势评价 小干扰稳定性 

分 类 号：TM74[电气工程—电力系统及自动化]