基于事件触发的DFIG次同步附加阻尼控制方法

doi:10.3969/j.issn.1000-7229.2017.09.015

电力建设 ›› 2017, Vol. 38 ›› Issue (9): 103-.doi: 10.3969/j.issn.1000-7229.2017.09.015

基于事件触发的DFIG次同步附加阻尼控制方法

曹澄沙1，肖湘宁1，张剑2

（1.华北电力大学电气与电子工程学院，北京市 102206;2. 电力规划设计总院，北京市 100120）

出版日期:2017-09-01
作者简介:曹澄沙（1993），女，硕士研究生，主要从事电力系统运行与控制、电力系统次同步振荡方面的研究工作分号肖湘宁（1953），男，教授，博士生导师，主要从事电力系统电能质量、现代电力电子技术应用等方面的研究教学工作分号张剑（1986），男，博士后，主要从事电力系统稳定、FACTS技术、次同步振荡分析与抑制等方面的研究工作。
基金资助:
基金项目：国家电网公司科技项目（SGXJ0000KXJS1500669）

Event-Triggered Based Sub-Synchronous Supplementary Damping Control Method of DFIG

CAO Chengsha1, XIAO Xiangning1, ZHANG Jian2

（1. School of Electrical & Electronic Engineering, North China Electric Power University, Beijing 102206, China;2. Electric Power Planning & Engineering Institute, Beijing 100120, China）

Online:2017-09-01
Supported by:

摘要/Abstract

摘要： 摘要：为快速、准确判断和有效抑制双馈感应发电机（double fed induction generator, DFIG）并网经串补输电系统送出发生的次同步控制互作用（sub-synchronous control interaction, SSCI）问题，首先分析了DFIG经串补送出系统SSCI的作用路径，并经数学推导给出了SSCI发生判据。然后，基于该判据，进一步提出了一种基于SSCI事件触发的DFIG次同步附加阻尼控制方法，提出了适用于快速检测需求的次同步频率提取方法；引入了迟滞环节来解决电机参数不确定导致的误判问题，提高方法的鲁棒性；设计了相频特性平滑的带通滤波器，增强了控制方法对频率变化SSCI问题的适用性。最后，进行PSCAD/EMTDC仿真验证，结果表明所提控制方法能够在风速变化、串补度变化及风机参数不确定情况下较好地阻尼SSCI，且由于引入了SSCI事件判断机制，附加控制在未出现SSCI风险时退出运行，不影响风机变流器的主控制功能。与已有的附加阻尼控制方法相比，所提控制方法在较高串补度下仍然具有较好的抑制效果。

关键词: 双馈感应发电机（DFIG）, 串补输电系统, 次同步控制互作用（SSCI）, 事件触发, 附加阻尼控制

Abstract: ABSTRACT： To fast and accurately estimate, and effectively mitigate sub-synchronous control interaction （SSCI） problems which occurs when the doubly-fed induction generator （DFIG） is connected to series compensation transmission system, this paper firstly analyzes the function path of SSCI and presents its occurrence criterion through the mathematical deduction. Then, based on this criterion, this paper puts forward a SSCI event-triggered based sub-synchronous supplementary damping control strategy of DFIG, and proposes the sub-synchronous frequency extraction method for rapid detection demand； adds hysteresis link to solve the misjudgment problems caused by generator parameter uncertainty and improve the robustness of the method； designs a band- pass filter for smoothing phase-frequency characteristics and improves the applicability of the control method to frequency varying SSCI problems. Finally, the simulation results from PSCAD/EMTDC indicate that the proposed control method still has good damping ability for SSCI when the wind speed or the series compensation degree changes, and even when the generator parameters are inaccurate. At the same time, when there is no SSCI risk, the supplementary damping control will quit operation according to the introduced SSCI event judging mechanism, so it will not influence the main control function of the DFIG inverter. Compared with the existing supplementary damping control methods, the proposed method still has better mitigation effect with higher compensation level.

Key words: double fed induction generator（DFIG）, series compensation transmission system, sub-synchronous control interaction（SSCI）, event-triggered, supplementary damping control

中图分类号:

TM 732

曹澄沙，肖湘宁，张剑. 基于事件触发的DFIG次同步附加阻尼控制方法[J]. 电力建设, 2017, 38(9): 103-.

CAO Chengsha, XIAO Xiangning, ZHANG Jian. Event-Triggered Based Sub-Synchronous Supplementary Damping Control Method of DFIG [J]. Electric Power Construction, 2017, 38(9): 103-.

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基于事件触发的DFIG次同步附加阻尼控制方法

Event-Triggered Based Sub-Synchronous Supplementary Damping Control Method of DFIG

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