电压型虚拟同步机控制策略下的双馈风电机组阻抗及次同步振荡特性

范丽霞1, 蔡瑞强1, 张欢畅1, 魏远1, 田恬2, 胡斌2

（1.西北电力设计院有限公司，陕西省西安市710075； 2.华北电力大学，北京市昌平区102206）

Impedance and Sub-Synchronous Oscillation Characteristics of DFIG with Voltage-Source Virtual Synchronous Control Strategy

FAN Lixia1, CAI Ruiqiang1, ZHANG Huanchang1, WEI Yuan1, TIAN Tian2, HU Bin1

(1. Northwest Electric Power Design Institute Co.，Ltd.，Xi’an 710075, Shaanxi Province, China; 2. North China Electric Power University, Changping District, Beijing 102206, China)

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摘要: 针对双馈风电机组(doubly-fed induction generators，DFIG)经串补送出系统存在次同步振荡(sub-synchronous oscillation，SSO)的问题，以电压型虚拟同步机(virtual synchronous generator，VSG)控制策略下的DFIG为研究对象，首先基于三相静止坐标系建立了其阻抗模型，推导了机组正、负序阻抗解析式；其次搭建了PSCAD/EMTDC模型，对理论推导阻抗特性和频率扫描结果进行了对比验证；最后基于奈奎斯特稳定判据定量分析了VSG控制策略下的DFIG经串补送出系统SSO特性，通过仿真验证了所建立模型和稳定性分析结论的正确性。研究结果为SSO的抑制提供了参考方向。

关键词 ：双馈风电机组, 电压型虚拟同步控制策略, 次同步振荡, 阻抗建模

Abstract：Sub-synchronous oscillation (SSO) is observed in doubly-fed induction generators (DFIG) connected to series-compensated transmission system. This paper focuses on the DFIG with voltage-source virtual synchronous control strategy ， and at first builds its impedance model based on three-phase stationary coordinate system. The positive and negative sequence impedance analytical formulas of DFIG are established. Then，the simulation model of the DFIG delivery system is built on PSCAD/EMTDC platform and the system impedance is validated. The results of theoretical deduction and simulation are verified by each other. Finally ， the influence of DFIG with voltage-source virtual synchronous control strategy on SSO is analyzed quantitatively based on Nyquist stability criterion. The correctness of the established model and stability analysis conclusion is verified by PSCAD/EMTDC simulation. Considering all the analysis ， this paper also guides the direction of the sub-synchronous suppression

Key words： doubly-fed induction generator (DFIG) control strategy of voltage virtual synchronous (VSG) sub-synchronous oscillation (SSO) impedance modeling ')" href="#">

impedance modeling

收稿日期: 2019-04-17

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引用本文:

范丽霞, 蔡瑞强, 张欢畅, 魏远, 田恬, 胡斌. 电压型虚拟同步机控制策略下的双馈风电机组阻抗及次同步振荡特性[J]. 发电技术, .
FAN Lixia, CAI Ruiqiang, ZHANG Huanchang, WEI Yuan, TIAN Tian, HU Bin. Impedance and Sub-Synchronous Oscillation Characteristics of DFIG with Voltage-Source Virtual Synchronous Control Strategy . Power Generation Technology, 0, (): 1-.

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http://www.pgtjournal.com/CN/ 或 http://www.pgtjournal.com/CN/Y0/V/I/1

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