直流电容储能反馈和负载功率前馈的PWM整流器控制策略

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摘要首先介绍了三相电压型PWM（pulse width modulation）整流器在dq轴系下的数学模型,分析了整流器的能量和功率交换关系。提出了一种电流内环、直流侧电容储能作为外环的电容储能反馈控制策略,并给出了环路设计方法。为了减小负载的不确定性对整流器系统的影响,引入了负载功率前馈估计算法。最后,实验比较了传统的电压、电流双闭环和本文所提出的控制策略的动、稳态特性。结果表明,本文所提出的控制策略能满足系统稳态时的控制要求,并且较传统的电压、电流双闭环控制策略具有更好的动态特性。

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	姜卫东
	李王敏
	佘阳阳
	吴志清
	胡杨

关键词 ： PWM整流器, 电网电压定向控制, 储能反馈, 双闭环, 负载功率前馈

Abstract：Firstly, the mathematical model of the three-phase voltage PWM rectifier in the dq coordinate system is introduced. The energy and power rectifier exchange relationship is analysed. A dual loop control strategy based on the inner loop for the current and the outer loop for the energy stored in capacitor is proposed, and the design method of the parameters of the control loop is given in this paper. To reduce the impact of uncertainty of the load on the rectifier, the load power feed-forward estimation algorithm is introduced. At last, the dynamic and steady state characteristics of rectifier under the traditional voltage and current double closed-loop control strategy and the strategy proposed in this paper are compared by using experiment. The experiment results show that the proposed control strategy can meet the control requirements of the system at steady state, and have better dynamic characteristics compared with the traditional voltage and current double closed-loop control strategy.

Key words： PWM rectifier grid voltage oriented control energy storage feedback double closed loop load power feed-forward

收稿日期: 2013-06-14 出版日期: 2015-05-25

PACS:

T461

基金资助:国家自然科学基金资助项目（51177037,51007018）

作者简介: 姜卫东男,1976年生,副教授,硕士生导师,主要研究方向为电力电子与电力传动,电气系统控制。李王敏女,1991年生,硕士研究生,主要研究方向为电力电子与电力传动。

引用本文:

姜卫东, 李王敏, 佘阳阳, 吴志清, 胡杨. 直流电容储能反馈和负载功率前馈的PWM整流器控制策略[J]. 电工技术学报, 2015, 30(8): 151-158. Jiang Weidong, Li Wangmin, She Yangyang, Wu Zhiqing, Hu Yang. Control Strategy for PWM Rectifier Based on Feedback of the Energy Stored in Capacitor and Load Power Feed-Forward. Transactions of China Electrotechnical Society, 2015, 30(8): 151-158.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I8/151

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