Study on Sub-synchronous Oscillation Mechanism and Suppression Measures for Direct Drive Generators in Direct-current Vicinity

QIU Haifeng; DING Xinjun; LI Ziming; WANG Weiqing

doi:10.14044/j.1674-1757.pcrpc.2018.03.028

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Study on Sub-synchronous Oscillation Mechanism and Suppression Measures for Direct Drive Generators in Direct-current Vicinity

更新时间：2024-09-14

- Study on Sub-synchronous Oscillation Mechanism and Suppression Measures for Direct Drive Generators in Direct-current Vicinity
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 3, Pages: 149-155(2018)
- 作者机构：
  
  1. 中国石化西北油田分公司石油工程技术研究院
  2. 国网浙江桐乡市供电公司
  3. 新疆大学电气工程学院可再生能源发电与并网技术教育部工程研究中心
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.03.028
  CLC： TM712
- Published：2018，
- 稿件说明：
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[1]邱海峰,丁新军,李自明,王维庆.直流近区含直驱机组的次同步振荡机理研究及抑制措施[J].电力电容器与无功补偿,2018,39(03):149-155.

QIU HAIFENG, DING XINJUN, LI ZIMING, et al. Study on Sub-synchronous Oscillation Mechanism and Suppression Measures for Direct Drive Generators in Direct-current Vicinity. [J]. Power capacitor & reactive power compensation, 2018, 39(3): 149-155.
[1]邱海峰,丁新军,李自明,王维庆.直流近区含直驱机组的次同步振荡机理研究及抑制措施[J].电力电容器与无功补偿,2018,39(03):149-155. DOI： 10.14044/j.1674-1757.pcrpc.2018.03.028.

QIU HAIFENG, DING XINJUN, LI ZIMING, et al. Study on Sub-synchronous Oscillation Mechanism and Suppression Measures for Direct Drive Generators in Direct-current Vicinity. [J]. Power capacitor & reactive power compensation, 2018, 39(3): 149-155. DOI： 10.14044/j.1674-1757.pcrpc.2018.03.028.

摘要

针对哈密直流近区直驱风电场送端并网时频繁出现的次同步振荡现象

文中建立了含多直驱风电机组风电场并网等值模型

并就等值模型以及永磁直驱风电机组控制系统对次同步振荡机理进行研究

接着用特征值分析法研究直驱风电机组与弱交流系统互作用引发的次同步振荡问题。其次就系统阻抗、风电出力、开机台数以及系统强度与直驱永磁风电机组控制参数等因素对风电次同步振荡特性作以仿真分析。仿真结果表明:直驱风电机组通过弱联送出线路并网时

其与弱交系统的互作用产生一对弱阻尼的特征根

特征根实部为正

表明了次同步振荡模态不稳定;众多影响因素对风电次同步振荡特性均有不同程度的影响。最后通过实时数字仿真实验初步验证了SVG附加阻尼控制对次同步谐波的抑制效果。

Abstract

For the frequent sub-synchronous oscillation（SSO）phenomena in the grid connection from the transmission end of direct drive permanent magnet wind turbine generators（D-PMSGs）based wind farms in direct-current vicinity of Hami area

in this paper

the equivalent model of wind power interconnection including multiple direct drive permanent magnet wind turbine generators（D-PMSGs）is set up

the equivalent model and mechanism of the D-PMSGs to the sub-synchronous oscillation are studied.Then

the issue of sub synchronous oscillation due to interaction of both D-PMSGs and weak AC system is studied by the use of eigenvalue analysis method.After that

the influence of such factors as system impedance

wind power output

number and control parameters of D-PMSGs etc.

on the feature of wind power sub synchronous oscillation is simulated and analyzed.It is shown by the simulation result that in case of interconnection of the D-PMSGs by the weak transmission line

its ineraction with the weak AC system generates a pair of characteristic root with weak impedance

of which the real part is positive

showing that sub-synchronous oscillation mode is instable.Multiple influence factors have different effects on the SSO characteristics of wind farm.Finally

the suppression effect of SVG additional damping control on sub-synchronous harmonic is preliminarily verified by real time digital simulation experiment.

关键词

直流近区直驱风电次同步振荡附加阻尼控制特征值分析法

Keywords

direct-current vicinitydirect drive wind powersub-synchronous oscillationadditional damping controleigenvalue analysis method

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