| 微网中三相逆变器类功率下垂控制和并联系统小信号建模与分析 |
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| 引用本文： | 张纯江,王晓寰,薛海芬,阚志忠,邬伟扬.微网中三相逆变器类功率下垂控制和并联系统小信号建模与分析[J].电工技术学报,2012(1):32-39. |
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| 作者姓名： | 张纯江 王晓寰 薛海芬 阚志忠 邬伟扬 |
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| 作者单位： | 燕山大学电力电子节能与传动控制河北省重点实验室 |
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| 基金项目： | 国家自然科学基金重点项目(50837003,51077113);河北省重点实验室开放基金(dldz201002)资助 |
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| 摘 要： | 基于公共节点电压的逆变器并联功率理论在微电网系统应用中存在局限性,本文以逆变器输出端电压为切入点重新推导了并联功率理论,提出一种基于＂类功率＂的无互联线并联下垂控制策略。依据＂类功率＂定义,建立了新型控制策略下的并联系统小信号数学模型。通过数学模型建立系统传递函数,依据自动控制原理分析下垂参数的变化对三相逆变器并联系统...
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| 关 键 词： | 下垂控制 类功率 三相逆变器 并联 微电网 |
A Quasi-Power Droop Control of Three-Phase Inverters and Small Signal Modeling and Analysis of Parallel System in Micro-Grid |
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| Zhang Chunjiang Wang Xiaohuan Xue Haifen Kan Zhizhong Wu Weiyang.A Quasi-Power Droop Control of Three-Phase Inverters and Small Signal Modeling and Analysis of Parallel System in Micro-Grid[J].Transactions of China Electrotechnical Society,2012(1):32-39. |
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| Authors: | Zhang Chunjiang Wang Xiaohuan Xue Haifen Kan Zhizhong Wu Weiyang |
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| Affiliation: | Zhang Chunjiang Wang Xiaohuan Xue Haifen Kan Zhizhong Wu Weiyang(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province Yanshan University QinHuangdao 066004 China) |
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| Abstract: | There is limitation of traditional power theory of parallel operation of inverters based on the voltage of point of common coupling(PCC) in micro-grid system.An improved power theory of parallel system is deduced based on output terminal voltage of an inverter from a viewpoint of micro-grid autonomy operation.The "quasi power" variables are defined by linear combination and quasi active power and quasi reactive power are only related to the phase and amplitude difference respectively.A quasi-power droop control method for parallel connected inverters is proposed based on the improved power theory.The small-signal mathematical model of the parallel system is derived in a novel droop control scheme,which provides a theoretical basis for the parallel system performance analysis and droop coefficient design.The experiments were studied in the PV platform formed by two parallel connected three-phase inverters and the experimental results verify the correctness and feasibility of the proposed method. |
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| Keywords: | Droop control Quasi-power three-phase inverter parallel micro-grid |
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