CN104201921A - 一种新型逆变系统中死区补偿控制方法 - Google Patents

一种新型逆变系统中死区补偿控制方法 Download PDF

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CN104201921A
CN104201921A CN201410508830.5A CN201410508830A CN104201921A CN 104201921 A CN104201921 A CN 104201921A CN 201410508830 A CN201410508830 A CN 201410508830A CN 104201921 A CN104201921 A CN 104201921A
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current
voltage
output voltage
control method
electric current
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CN104201921B (zh
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张海波
刘俊岭
孙邦伍
王兆明
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NANJING GUANYA POWER EQUIPMENT CO Ltd
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NANJING GUANYA POWER EQUIPMENT CO Ltd
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Abstract

本发明公开了一种新型逆变系统中死区补偿控制方法,通过构建内在模型对电压、电流指令进行修正以得到期望的电压电流幅值及波形,其流程为:首先构建内在模型R(K),电压或电流给定初始指令R(K1),经闭环PI调节,实际输出电压或电流R(K2);然后判断实际输出电压或电流R(K2)是否与构建模型R(K)相同;若此二者不同,则对其误差再次调节,将调节结果记录至指定数组en,并将en对应叠加于电压或电流指令R(K1),如此反复,逐周期对误差进行调节,则最终将输出稳定于内在模型R(K);若R(K)为一标准正弦波,则可消除输出电压或电流R(K2)的死区。

Description

一种新型逆变系统中死区补偿控制方法
技术领域
本发明涉及一种电力电子技术及控制的交叉学科领域,尤其涉及一种新型逆变系统中死区补偿控制方法。
背景技术
随着电力电子技术的迅速发展,SPWM逆变器已在UPS、光伏逆变器、变频器等系统中得到广泛应用。为达到效率高、体积小、成本低廉等要求,主电路的开关频率越来越高,在理论上,逆变器输出电压、电流应与给定指令相同,但在实际应用中,由于死区时间的设置和开关器件固有特性的影响,给输出电压造成了严重的波形畸变和基波电压损失,基于上述因素,死区补偿技术得到了很好的发展与应用。
发明内容
针对现有技术中存在的问题,本发明提供了一种新型逆变系统中死区补偿控制方法,来满足输出电压、电流减小畸变的影响。
本发明的技术解决方案是:一种新型逆变系统中死区补偿控制方法,通过构建内在模型对电压、电流指令进行修正以得到期望的电压电流幅值及波形。
本发明流程为:首先构建内在模型R(K),电压或电流给定初始指令R(K1),经闭环PI调节,实际输出电压或电流R(K2);然后判断实际输出电压或电流R(K2)是否与构建模型R(K)相同;若此二者不同,则对其误差再次调节,将调节结果记录至指定数组en,并将en对应叠加于电压或电流指令R(K1),如此反复,逐周期对误差进行调节,则最终将输出稳定于内在模型R(K);若R(K)为一标准正弦波,则可消除输出电压或电流R(K2)的死区。
本发明基于DSP实现。
本发明的有益效果是:本发明与传统方法和一般方法相比,具有快速性、准确性以及通用性的特点,能够快速准确消除逆变过程中的PWM死区,适用于各种功率、单相、三相逆变器。
附图说明
图1为本发明逆变器系统死区补偿控制流程图。
具体实施方式
以下结合附图和具体实施例对本发明技术方案作进一步的详细说明。
如图1所示,图1为本发明逆变器系统死区补偿控制流程图。
一种新型逆变系统中死区补偿控制方法,通过构建内在模型对电压、电流指令进行修正以得到期望的电压电流幅值及波形。
本发明流程为:首先构建内在模型R(K),电压或电流给定初始指令R(K1),经闭环PI调节,实际输出电压或电流R(K2);然后判断实际输出电压或电流R(K2)是否与构建模型R(K)相同;若此二者不同,则对其误差再次调节,将调节结果记录至指定数组en,并将en对应叠加于电压或电流指令R(K1),如此反复,逐周期对误差进行调节,则最终将输出稳定于内在模型R(K);若R(K)为一标准正弦波,则可消除输出电压或电流R(K2)的死区。
本发明基于DSP实现。
本发明与传统方法和一般方法相比,具有快速性、准确性以及通用性的特点,能够快速准确消除逆变过程中的PWM死区,适用于各种功率、单相、三相逆变器。
虽然本发明已以较佳实施例公开如上,但它们并不是用来限定本发明,任何熟习此技艺者,在不脱离本发明之精神和范围内,自当可作各种变化或润饰,但同样在本发明的保护范围之内。

Claims (3)

1.一种新型逆变系统中死区补偿控制方法,其特征在于:通过构建内在模型对电压、电流指令进行修正以得到期望的电压电流幅值及波形。
2.根据权利要求1所述的死区补偿控制方法,其特征在于:其流程为:
首先构建内在模型R(K),电压或电流给定初始指令R(K1),经闭环PI调节,实际输出电压或电流R(K2);然后判断实际输出电压或电流R(K2)是否与构建模型R(K)相同;若此二者不同,则对其误差再次调节,将调节结果记录至指定数组en,并将en对应叠加于电压或电流指令R(K1),如此反复,逐周期对误差进行调节,则最终将输出稳定于内在模型R(K);若R(K)为一标准正弦波,则可消除输出电压或电流R(K2)的死区。
3.根据权利要求2所述的死区补偿控制方法,其特征在于:本方法基于DSP实现。
CN201410508830.5A 2014-09-28 2014-09-28 一种逆变系统中死区补偿控制方法 Expired - Fee Related CN104201921B (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110273914A1 (en) * 2010-05-06 2011-11-10 Lsis Co., Ltd. Output current distortion compensating apparatus in inverter
CN102624276A (zh) * 2012-04-25 2012-08-01 杭州电子科技大学 一种新颖的交流伺服逆变器死区效应补偿的方法
CN102647141A (zh) * 2011-12-26 2012-08-22 东方日立(成都)电控设备有限公司 电压矢量闭环补偿
CN103401450A (zh) * 2013-07-30 2013-11-20 中国西电电气股份有限公司 一种死区补偿的方法
CN104037768A (zh) * 2014-06-25 2014-09-10 哈尔滨同为电气股份有限公司 H桥级联statcom自适应死区补偿方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110273914A1 (en) * 2010-05-06 2011-11-10 Lsis Co., Ltd. Output current distortion compensating apparatus in inverter
CN102647141A (zh) * 2011-12-26 2012-08-22 东方日立(成都)电控设备有限公司 电压矢量闭环补偿
CN102624276A (zh) * 2012-04-25 2012-08-01 杭州电子科技大学 一种新颖的交流伺服逆变器死区效应补偿的方法
CN103401450A (zh) * 2013-07-30 2013-11-20 中国西电电气股份有限公司 一种死区补偿的方法
CN104037768A (zh) * 2014-06-25 2014-09-10 哈尔滨同为电气股份有限公司 H桥级联statcom自适应死区补偿方法

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