Droop Coefficient Modification Method for DFIG Based on Low-order System Frequency Response Model

被引：0
|
作者：
Quan R. [1 ]
Pan W. [1 ,2 ]
Liu M. [1 ]
机构：
[1] College of Energy and Electrical Engineering, Hohai University, Nanjing
[2] Research Center for Renewable Energy Generation Engineering of Ministry of Education, Hohai University, Nanjing
来源：
Pan, Wenxia (pwxhh@hhu.edu.cn) | 2018年 / Automation of Electric Power Systems Press卷 / 42期
基金：
中国国家自然科学基金;
关键词：
Doubly-fed induction generators (DFIG); Droop coefficient; Low-order system frequency response model; Primary frequency control ability; Quasi-steady-state frequency deviation; Small signal analysis;
D O I：
10.7500/AEPS20170410001
中图分类号：
学科分类号：
摘要：
Owing to the fact that the operating point on the de-loading power curve will shift when the actual rotor speed changed during the frequency droop control, doubly-fed induction generators (DFIG) cannot provide the desired primary frequency control ability. To solve this problem, firstly a novel low-order system frequency response model is established for distributed systems including DFIG and thermal generation unit based on the small signal analysis theory. And then the quantified formulas of the actual and desired primary frequency control abilities of DFIG are derived by using the proposed model. According to the derivation, this paper proposes that DFIG provide the desired primary frequency control ability after multiplying a reduction factor for the original set of droop coefficients. Finally, the capability of the proposed droop coefficient modification method is tested on an actual distributed system. The simulation results show that, with the proposed method, not only has the system quasi-steady-state frequency deviation reached the expectation level, but also the system maximum frequency deviation has further improved. © 2018 Automation of Electric Power Systems Press.
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页码：68 / 73and90
页数：7322
相关论文
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