CN115102418A - 一种基于深度负反馈的大功率线性测试电源 - Google Patents

一种基于深度负反馈的大功率线性测试电源 Download PDF

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CN115102418A
CN115102418A CN202210693595.8A CN202210693595A CN115102418A CN 115102418 A CN115102418 A CN 115102418A CN 202210693595 A CN202210693595 A CN 202210693595A CN 115102418 A CN115102418 A CN 115102418A
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power supply
transformer
npn transistor
feedback
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刘召杰
戴人杰
卫思明
赵莹莹
江安烽
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Wuhan University WHU
State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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Wuhan University WHU
State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac 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
    • H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
    • 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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)

Abstract

本发明涉及一种基于深度负反馈的大功率线性测试电源，包括：直流电源，负载，全桥逆变模块，标准电流互感器，信号发生器，反馈补偿器，高速高比例放大器，变压器，其中，全桥逆变模块输入端连接直流电源，输出端连接负载，控制端连接变压器二次绕组，全桥逆变模块中的元器件均工作于线性区；标准电流互感器与负载串联，输出端与反馈补偿器输入端相连；反馈补偿器输出的负极与信号发生器的负极相连，正极与变压器一次绕组相连；信号发生器的正极依次连接高速高比例放大器和变压器一次绕组。与现有技术相比，本发明具有容量大、稳定性好、响应速度快、干扰小等优点。

Description

一种基于深度负反馈的大功率线性测试电源
技术领域
本发明涉及测试电源领域，尤其是涉及一种基于深度负反馈的大功率线性测试电源。
背景技术
电流互感器可以把数值较大的一次电流通过一定的变比转换为数值较小的二次电流，用来进行保护、测量等用途，既可以在正常工作电流范围内向测量、计量等装置提供电网的电流信息，又可以在电网故障状态下向继电保护等装置提供电网故障电流信息，因此得到了非常广泛的应用。
电流互感器的准确性直接影响到发、供、用电三方的经济利益及电网的稳定性，因此，对电流互感器的测试是电力系统中的重要课题。目前，用于电流互感器检验的测试电源主要为由NPN晶体管与PNP晶体管组成的的半桥结构的开关电源或开环线性电源。在低电压小容量且精度要求不高的应用场景下，半桥结构的开关电源可以满足测试需求。但由于PNP晶体管容量较小，半桥结构的直流侧需要两个电容器串联，工作时需要控制两个电容器电压的均衡，并且开关电源的输出也存在大量高次谐波和电磁干扰进而对测试对象产生较大的影响，因此半桥结构的开关电源不再适用于大容量高电压等级的电流互感器测试。开环线性电源的晶体管均工作于线性区，其输出波形较好，电磁干扰较小，但其输出的稳定性较差。因此，急需一种控制简单、能够应对大容量高电压等级、输出稳定性好、并且电磁干扰较小的测试电源。
发明内容
本发明的目的就是为了提供一种基于深度负反馈的大功率线性测试电源，提高测试电源的容量、输出稳定性与反馈响应速度，降低输出的谐波含量与电磁干扰。
本发明的目的可以通过以下技术方案来实现：
一种基于深度负反馈的大功率线性测试电源，包括：直流电源，负载，全桥逆变模块，标准电流互感器，信号发生器，反馈补偿器，高速高比例放大器，变压器，其中，全桥逆变模块输入端连接直流电源，输出端连接负载，控制端连接变压器二次绕组，全桥逆变模块中的元器件均工作于线性区；标准电流互感器与负载串联，输出端与反馈补偿器输入端相连；反馈补偿器输出的负极与信号发生器的负极相连，正极与变压器一次绕组相连；信号发生器的正极依次连接高速高比例放大器和变压器一次绕组。
所述全桥逆变模块由NPN晶体管以全桥结构构成。
所述全桥逆变模块包括第一NPN晶体管，第二NPN晶体管，第三NPN晶体管，第四NPN晶体管，其中，第一NPN晶体管和第二NPN晶体管控制端连接的变压器二次绕组同名端相同，第三NPN晶体管和第四NPN晶体管控制端连接的变压器二次绕组同名端相同，第一NPN晶体管和第三NPN晶体管控制端连接的变压器二次绕组同名端相反。
所述反馈补偿器对CT输出信号进行放大或缩小。
所述反馈补偿器的放大或缩小倍数基于负载的测试环境和测试要求确定。
与现有技术相比，本发明具有以下有益效果：
(1)本发明采用全桥结构，提高了测试电源的测试容量。
(2)本发明采用标准电流互感器对电流量进行检测，并基于反馈补偿器对电路进行负反馈，提高了测试电源的输出稳定性的同时提高了反馈响应速度，降低输出的谐波含量与电磁干扰。
附图说明
图1为本发明的拓扑图；
图2为本发明的控制逻辑图。
具体实施方式
下面结合附图和具体实施例对本发明进行详细说明。本实施例以本发明技术方案为前提进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于下述的实施例。
一种基于深度负反馈的大功率线性测试电源，如图1所示，建立全桥拓扑：以NPN晶体管为核心，将直流源DC、四组NPN晶体管T1～T4与负载R连接为全桥结构。四组NPN晶体管构成全桥逆变模块。电流互感器CT连接至负载回路中，用于测量负载支路的电流量，其输出作为反馈用于提高测试电源输出的稳定性。
如图2所示，建立控制逻辑策略：将连接在回路中的电流互感器的输出信号连接至反馈补偿器，将反馈补偿器输出信号连接在信号发生器与变压器之间。反馈补偿器对CT输出信号进行信号放大或缩小，其放大或缩小参数k根据测试要求确定。信号发生器的输出经高速高比例功率放大器处理后输出与反馈补偿器输出相减后输入至变压器，变压器包括一个一次绕组N1与四个二次绕组N21～N24，其中N21与N22为第一组、N23与N24为第二组。每组中的绕组同名端相同，组与组的同名端相反。N21用于驱动晶体管T1，N22用于驱动晶体管T2，N23用于驱动晶体管T3，N24用于驱动晶体管T4。晶体管T1～T4均工作于线性区。

Claims (5)

1.一种基于深度负反馈的大功率线性测试电源，包括：直流电源，负载，其特征在于，还包括全桥逆变模块，标准电流互感器，信号发生器，反馈补偿器，高速高比例放大器，变压器，其中，全桥逆变模块输入端连接直流电源，输出端连接负载，控制端连接变压器二次绕组，全桥逆变模块中的元器件均工作于线性区；标准电流互感器与负载串联，输出端与反馈补偿器输入端相连；反馈补偿器输出的负极与信号发生器的负极相连，正极与变压器一次绕组相连；信号发生器的正极依次连接高速高比例放大器和变压器一次绕组。
2.根据权利要求1所述的一种基于深度负反馈的大功率线性测试电源，其特征在于，所述全桥逆变模块由NPN晶体管以全桥结构构成。
3.根据权利要求2所述的一种基于深度负反馈的大功率线性测试电源，其特征在于，所述全桥逆变模块包括第一NPN晶体管，第二NPN晶体管，第三NPN晶体管，第四NPN晶体管，其中，第一NPN晶体管和第二NPN晶体管控制端连接的变压器二次绕组同名端相同，第三NPN晶体管和第四NPN晶体管控制端连接的变压器二次绕组同名端相同，第一NPN晶体管和第三NPN晶体管控制端连接的变压器二次绕组同名端相反。
4.根据权利要求1所述的一种基于深度负反馈的大功率线性测试电源，其特征在于，所述反馈补偿器对CT输出信号进行放大或缩小。
5.根据权利要求4所述的一种基于深度负反馈的大功率线性测试电源，其特征在于，所述反馈补偿器的放大或缩小倍数基于负载的测试环境和测试要求确定。
CN202210693595.8A 2022-06-17 2022-06-17 一种基于深度负反馈的大功率线性测试电源 Pending CN115102418A (zh)

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