发电技术 ›› 2022, Vol. 43 ›› Issue (6): 880-891.DOI: 10.12096/j.2096-4528.pgt.21121

• 新能源 • 上一篇    下一篇

风电场次同步振荡等值建模方法研究

康佳乐1, 余浩2, 段瑶2, 陈武晖1, 王丹辉3   

  1. 1.太原理工大学电气与动力工程学院,山西省 太原市 030024
    2.广东电网有限责任公司电网规划研究中心,广东省 广州市 510080
    3.江苏大学电气信息工程学院,江苏省 镇江市 212013
  • 收稿日期:2021-12-25 出版日期:2022-12-31 发布日期:2023-01-03
  • 作者简介:康佳乐(1998),男,硕士研究生,研究方向为电力系统稳定控制,kangjiale159@163.com
    陈武晖(1974),男,博士,教授,研究方向为电力系统分析与控制,本文通信作者,chenwuhui@tyut.edu.cn
  • 基金资助:
    国家自然科学基金项目(51977098);南方电网公司科技项目(037700KK52190012(GDKJXM20198282)

Equivalent Modeling Method of Sub-synchronous Oscillation in Wind Farm

Jiale KANG1, Hao YU2, Yao DUAN2, Wuhui CHEN1, Danhui WANG3   

  1. 1.College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, China
    2.Grid Planning & Research Center, Guangdong Power Grid Co. , Ltd. , Guangzhou 510080, Guangdong Province, China
    3.School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China
  • Received:2021-12-25 Published:2022-12-31 Online:2023-01-03
  • Supported by:
    National Natural Science Foundation of China(51977098);Science and Technology Project of China Southern Power Grid Corporation(037700KK52190012┣GDKJXM20198282)

摘要:

风电场中风机数量大并且处于不同的运行风速,建立包含每台风机详细的次同步振荡研究模型非常复杂,而且应用该模型进行次同步振荡研究计算耗时长。因此,需要建立保留风电场与接入系统相互作用的次同步振荡特性的风电场等值模型,简化次同步振荡研究的复杂程度。计及风机不同运行风速区间的不同控制策略对次同步振荡模式的影响,采用基于风速指标K-means算法聚类风机,考虑各台风电机组出线端的电流幅值和相位不同的影响,提出基于功率等值的集电系统简化建模方法,在PSCAD/EMTDC中搭建相关风电场仿真模型,并对等值前后次同步振荡模态进行了对比,用以验证该等值方法的合理性。

关键词: 风电场, 集电系统, 次同步振荡, 功率等值

Abstract:

The number of turbines in the actual wind farm is large and at different operating wind speeds. It is very complicated to build a sub-synchronous oscillation study model that includes a detailed model of each turbine. Furthermore, it is time-consuming and computationally intensive to apply the model to the sub-synchronous oscillation study. Therefore, it is necessary to simplify the complexity of the sub-synchronous oscillation study by establishing a wind farm equivalent model that retains the sub-synchronous oscillation characteristics of the interaction between the wind farm and the interconnected system. In this paper, the effect of different control strategies on the sub-synchronous oscillation model in different operating wind speed intervals of wind turbines was taken into account, and the wind turbines were clustered using the K-means algorithm based on wind speed indexes. Considering the effects of different current amplitude and phase at the terminal of each wind turbine, a simplified modeling method of the collector system based on power equivalence was proposed. And the relevant wind farm simulation model was built in PSCAD/EMTDC, and the sub-synchronous oscillation modes before and after the equivalence were used to verify the rationality of this equivalence method.

Key words: wind farm, collector system, sub-synchronous oscillation, power equivalence

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