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CN111478567B - 一种级联h桥整流器偏置分量和基波分量注入均压方法 - Google Patents

一种级联h桥整流器偏置分量和基波分量注入均压方法 Download PDF

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CN111478567B
CN111478567B CN202010169760.0A CN202010169760A CN111478567B CN 111478567 B CN111478567 B CN 111478567B CN 202010169760 A CN202010169760 A CN 202010169760A CN 111478567 B CN111478567 B CN 111478567B
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李金玉
龚春英
陈杰
邰伟宇
袁牧琳
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Nanjing University of Aeronautics and Astronautics
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/25—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in series, e.g. for multiplication of voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters

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Abstract

本发明公开了一种级联H桥整流器偏置分量和基波分量注入均压方法，该方法包括：采样输入电压电流；计算偏置电压；计算基波分量；计算偏置分量和基波分量之差；计算调制波均压分量。该方法可以在级联H桥每个模块功率较大不平衡时仍能保持各路电压均压，轻载情况下能够可克服基波平衡法在特殊情况下无法均压的缺点，调节速度快，误差小，调制比越高，该方法的优点越突出。该控制方法在级联模块数较多时，即使有一个模块输出空载也可以实现电容电压平衡，具有容错的特点，新方法有助于提高系统的可靠性，可以使用模拟电路实现。

Description

一种级联H桥整流器偏置分量和基波分量注入均压方法
技术领域
本发明涉及级联H桥整流器技术领域，具体涉及一种级联H桥整流器偏置分量和基波分量注入均压方法。
背景技术
电力电子技术的应用可大大提高电能变换装置功率密度，减小体积和重量。随着多电和全电飞机的发展，飞机用电量不断增加，机载电力电子设备越来越多，因此对机载电力电子变换装置的可靠性、可维护性及可测试性提出了更高的要求。级联H桥整流器可应用于航空整流器或电力电子变压器中。级联H桥整流器每个模块之间需要均压控制，当出现过压问题时，会烧坏功率器件，所以本文提出一种均压方法。
发明内容
本发明的目的在于提出一种一种级联H桥整流器偏置分量和基波分量注入均压方法，该方法能够更好的使级联H桥整流器输出电压均压。
本发明为解决上述技术问题采用以下技术方案：
一种级联H桥整流器偏置分量和基波分量注入均压方法，包括以下步骤：
A.采样输入电压；
B.计算偏置电压分量；
C.计算正弦基波分量；
D.计算偏置分量和基波分量之差；
E.计算调制波均压分量。
进一步的，步骤B中所述偏置电压ofs的计算公式如下：
Figure BDA0002408775490000011
ui为输入电压，Um为额定输入电压峰值，k为偏置调节系数，2<k<5。
进一步的，步骤C中所述正弦基波分量sw为输入电压和所有模块输出直流电压总和给定值的比值，sw＝ui/Udc *，Udc *为输出电压给定值。
进一步的，步骤C中所述正弦基波分量osw的计算公式为：osw＝osf–sw。
进一步的，步骤E中计算调制波均压分量的步骤包括：
步骤1：计算每个H桥调制波中的均压分量Δui
Figure BDA0002408775490000021
ubi为均压环的输出值，Δui为每个H桥调制波中的均压分量；
步骤2：Δui和电流环输出的总调制波相加后得到各个模块的调制波。
本发明采用以上技术方案与现有技术相比，具有以下技术优点：轻载时候具有较好的平衡能力和保护能力，电压平衡范围得到扩大，调节速度快，调节误差小，在多模块工作中当某一路没有负载时，新方法依然能够工作，实现无载容错控制，本方法不仅可以使用数字控制实现，而且可以使用模拟电路实现。基于这些优点，新方法能够提高系统安全性。
附图说明
图1级联H桥整流器示意图；
图2本均压方法控制框图；
图3本均压方法实现流程图；
其中：ui—交流输入电压，L、Rs—交流电感和等效串联电阻，uL—电感电压；udc1，udc2，…，udcn—直流侧n个独立的直流输出电压，Ti1～Ti4—第i个H桥单元的4个开关管，Ci、Ri—第i个单元的输出电容和负载电阻，ofs—偏置电压，Udc *—输出电压给定值，sw(sine wave)—输入电压和输出电压的比值，ubi—均压环的输出值，Δui—每个H桥调制波中的均压分量。
图1所示为级联H桥电路，级联H桥可以适用于整流、固态变压器、级联光伏逆变等场合。单H桥的组成为：Ti1、Ti3漏极连接形成单模块直流端口A，Ti2、Ti3源极连接形成单模块直流端口B，Ti1的源极和Ti2的漏极连接形成单模块交流流端口C，Ti3源极和Ti4漏极连接形成单模块交流端口D。级联H桥直流端口相互独立，交流端口相互串联，形成n个直流端口和一个交流端，在整流电路中，交流端口和电感、交流输入电压依次串联。每个模块的电容、负载、直流端口并联连接。
具体实施方式
本发明提供一种级联H桥整流器偏置分量和基波分量注入均压方法，为使本发明的目的，技术方案及效果更加清楚，明确，以及参照附图并举实例对本发明进一步详细说明。应当理解，此处所描述的具体实施仅用以解释本发明，并不用于限定本发明。
工作流程的详细说明如下。
一种级联H桥整流器偏置分量和基波分量注入均压方法，该方法包括以下步骤：
第一步，数据采集；
第二步，计算偏置电压；
第三步，计算基波分量；
第四步，计算偏置分量和基波分量之差；
第五步，计算调制波均压分量。
在图3中，ui为输入电压，Um为额定输入电压峰值，ofs为偏置电压。Udc为输出电压,Udc *为输出电压给定值。sw为输入电压和所有模块输出直流电压总和给定值的比值，osf减去sw得到含有偏置电压分量和正弦基波分量的osw(offset and sine wave)。
Figure BDA0002408775490000031
在ofs中，2<k<5，这里取典型值3。
sw＝ui/Udc *；
osw＝osf–sw；
如图2所示，udci的平均值和udci做差经过PI调节后求得ubi，作为均压环的幅值，ubi和osw相乘以后得到均压分量，Δui为每个H桥调制波中的均压分量。
Figure BDA0002408775490000032
Δui和电流内环的总调制波(共同调制波)相加后得到各个模块的调制波。最后一个模块的均压分量为前n-1个模块的均压分量总和的相反数。
在级联整流器(如固态变压器)的控制中，电压外环控制直流电压，电流内环控制电感电流，使得电感电流和输入电压同频同相，变换器工作在单位功率因素，电压外环得到电流幅值给定值，电流内环负责电感电流控制，这样可以得到共用的调制波。共同的调制波并不能控制直流电压的均衡，而是需要叠加一个均压分量，本文提出的均压分量求解方法能够提高均压范围或有功功率重新分配能力。

Claims (1)

1.一种级联H桥整流器偏置分量和基波分量注入均压方法，其特征在于，包括以下步骤：
A.采样输入电压；
B.计算偏置电压分量；
C.计算正弦基波分量；
D.计算偏置分量和基波分量之差；
E.计算调制波均压分量；
步骤B中所述偏置电压ofs的计算方法如下：
Figure FDA0003527313560000011
ui为输入电压，Um为额定输入电压峰值，k为偏置调节系数；
2<k<5；
步骤C中所述正弦基波分量sw为输入电压和输出电压给定值的比值，sw＝ui/Udc *，Udc *为输出电压给定值；
步骤D中所述偏置分量和基波分量之差osw的计算公式为：osw＝osf–sw；
步骤E中计算调制波均压分量的步骤包括：
步骤1：计算每个H桥调制波中的均压分量Δui
Figure FDA0003527313560000012
ubi为均压环的输出值，Δui为每个H桥调制波中的均压分量，n为H桥的数目；
步骤2：Δui和电流环输出的总调制波相加后得到各个H桥的调制波。
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CN101741274A (zh) * 2009-12-15 2010-06-16 哈尔滨工业大学 单元矢量延时叠加多电平空间矢量的调制方法及实现电路
CN103929045A (zh) * 2013-01-16 2014-07-16 通用电气能源电能变换科技有限公司 变换器装置，驱动单元和相关方法
CN108768191A (zh) * 2018-07-10 2018-11-06 南京工业大学 一种单相多模块级联固态变压器整流级均压的控制方法

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CN101741274A (zh) * 2009-12-15 2010-06-16 哈尔滨工业大学 单元矢量延时叠加多电平空间矢量的调制方法及实现电路
CN103929045A (zh) * 2013-01-16 2014-07-16 通用电气能源电能变换科技有限公司 变换器装置，驱动单元和相关方法
CN108768191A (zh) * 2018-07-10 2018-11-06 南京工业大学 一种单相多模块级联固态变压器整流级均压的控制方法

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