CN205693571U - A single-phase multi-function multiplexing power electronic load - Google Patents
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Abstract
本实用新型公开了一种单相多功能复用型电力电子负载，它包括负载换流器，所述负载换流器与能馈换流器连接，在负载换流器与能馈换流器之间并联有直流电容器；解决了现有技术的电力电子负载都是针对单一类别电力电子负载的，功能相对单一，设备利用率偏低，应用范围较小等技术问题。
The utility model discloses a single-phase multifunctional reusable power electronic load, which comprises a load converter, the load converter is connected with an energy-feeding converter, and the load converter and the energy-feeding converter A DC capacitor is connected in parallel between them; it solves the technical problems that the power electronic loads in the prior art are all aimed at a single type of power electronic load, have relatively single functions, low equipment utilization rate, and small application range.
Description
技术领域technical field
本实用新型属于电力电子及电力系统应用技术领域，涉及一种单相多功能复用型电力电子负载。The utility model belongs to the technical field of power electronics and power system applications, and relates to a single-phase multifunctional multiplexing power electronic load.
背景技术Background technique
随着电力电子技术以及设备供电技术的不断发展，各式各样的电源被广泛应用于工业和民用的各行各业。如今，电源已经成为人们生产、生活中至关重要的一部分，一旦发生电源损坏或故障事件，将直接影响应用机器的正常运作，进而对日常生产、生活的正常进行造成巨大影响，甚至给国民经济带来巨大损失。由于电源设备的安全性以及稳定性极其重要，各种电源设备类的产品在正式投入使用前都要进行数十小时的试验。如可靠性试验、输出特性试验等，利用实验结果以检验技术指标和性能指标是否达标。传统的电源试验方法主要是采用耗能的电阻箱或水阻试验台作为负载进行试验，然而这种试验方法存在着很多缺陷，比如（1）电阻功率较小，并且在长时间的大电流工作条件下易出现电阻老化甚至损毁现象（2）由于电阻消耗大量的电能，并且还需要对试验过程中产生的多余热量进行散热处理，造成双重浪费。（3）一般负载只能采用有级调节，具有固定阻值或固定负载特性曲线，很难适应需要连续阻值调节的试验场合。（4）一般负载体积都较为庞大，需占用很大空间。With the continuous development of power electronics technology and equipment power supply technology, various power supplies are widely used in various industries and civilian industries. Nowadays, power supply has become a vital part of people's production and life. Once a power supply is damaged or fails, it will directly affect the normal operation of the application machine, which will have a huge impact on the normal operation of daily production and life, and even affect the national economy. cause huge losses. Because the safety and stability of power supply equipment are extremely important, all kinds of power supply equipment products must be tested for dozens of hours before they are officially put into use. Such as reliability test, output characteristic test, etc., use the experimental results to check whether the technical indicators and performance indicators are up to standard. The traditional power test method mainly uses an energy-consuming resistance box or a water resistance test bench as a load for testing. However, this test method has many defects, such as (1) the resistance power is small, and it works under long-term high current Resistance aging or even damage is easy to occur under certain conditions (2) Because the resistance consumes a large amount of electric energy, and it is necessary to dissipate the excess heat generated during the test process, resulting in double waste. (3) The general load can only be adjusted in stages, with fixed resistance or fixed load characteristic curve, it is difficult to adapt to the test occasions that require continuous resistance adjustment. (4) Generally, the load volume is relatively large and takes up a lot of space.
正是由于这些因素的影响，人们一直在寻找一种更为有效的电源试验装置来代替传统负载对电源进行放电试验。近些年来，越来越多的电力电子装置被广泛运用，国内外的学者开始研究各种电力电子负载来代替传统负载。随着PWM控制技术成功运用于整流、逆变的设计之中，可以实现网侧的单位功率因数和正弦波电流控制，实现电能的双向传输。然而目前有关电力电子负载的研究都是针对单一类别电力电子负载的，功能相对单一，设备利用率偏低，应用范围较小。It is because of the influence of these factors that people have been looking for a more effective power supply test device to replace the traditional load for the discharge test of the power supply. In recent years, more and more power electronic devices have been widely used, and scholars at home and abroad have begun to study various power electronic loads to replace traditional loads. With the successful application of PWM control technology in the design of rectification and inverter, the unit power factor and sine wave current control on the grid side can be realized, and the two-way transmission of electric energy can be realized. However, the current research on power electronic loads is all aimed at a single type of power electronic load, with relatively single functions, low equipment utilization, and a small range of applications.
实用新型内容：Utility model content:
本实用新型要解决的技术问题：提供一种单相多功能复用型电力电子负载，以解决现有技术的电力电子负载都是针对单一类别电力电子负载，存在功能相对单一、设备利用率偏低、应用范围较小等技术问题。The technical problem to be solved by the utility model is to provide a single-phase multi-functional reusable power electronic load to solve the problem that the power electronic loads in the prior art are all aimed at a single type of power electronic load, and have relatively single functions and biased equipment utilization. Low, small application range and other technical problems.
本实用新型技术方案：Technical scheme of the utility model:
一种单相多功能复用型电力电子负载，它包括负载换流器，所述负载换流器与能馈换流器连接，在负载换流器与能馈换流器之间并联有直流电容器。A single-phase multi-functional multiplexing type power electronic load, which includes a load converter, the load converter is connected to the energy-feeding converter, and a DC capacitor.
所述负载换流器为AC/DC型单相负载换流器，它包括四组反并联二极管的开关功率器件V1-V4和进线电抗器L1组成，进线电抗器L1一端与功率开关器件 V1和V2的中点相连接，功率开关器件 V3和V4中点由导线引出，功率开关器件 V1和V3位于上桥臂，功率开关器件 V2 和V4位于下桥臂；所述能馈换流器为DC/AC型单相能馈换流器，它包括四组反并联二极管的功率开关器件V5-V8和出线电抗器L2组成，出线电抗器L2一端与功率开关器件 V5和V6的中点相连接，功率开关器件 V7和V8中点由导线引出，功率开关器件 V5 和V7位于上桥臂，功率开关器件 V6 和V8位于下桥臂。The load converter is an AC/DC type single-phase load converter, which consists of four sets of anti-parallel diode switching power devices V 1 -V 4 and a line reactor L 1 , one end of the line reactor L 1 It is connected with the midpoint of the power switching devices V1 and V2 , the midpoint of the power switching devices V3 and V4 is led out by wires, the power switching devices V1 and V3 are located in the upper bridge arm, and the power switching devices V2 and V4 Located in the lower bridge arm; the energy-fed converter is a DC/AC single-phase energy-fed converter, which consists of four sets of anti-parallel diode power switching devices V 5 -V 8 and an outgoing line reactor L 2 , the outgoing line One end of the reactor L2 is connected to the midpoint of the power switching devices V5 and V6 , the midpoint of the power switching devices V7 and V8 is led out by a wire, the power switching devices V5 and V7 are located in the upper bridge arm, and the power switching devices V 6 and V 8 are located in the lower bridge arm.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V3关断，功率开关器件 V4导通，功率开关器件 V5关断，功率开关器件 V6导通，则成为DC/DC型负载换流器和DC/DC型能馈换流器。The power switch device V 3 of the AC/DC type single-phase load converter and the DC/AC type single-phase energy-fed converter is turned off, the power switch device V 4 is turned on, the power switch device V 5 is turned off, and the power When the switching device V 6 is turned on, it becomes a DC/DC type load converter and a DC/DC type regenerative converter.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V3关断，功率开关器件 V4导通，则成为DC/DC型负载换流器和DC/AC型单相能馈换流器。The power switching device V 3 of the AC/DC type single-phase load converter and the DC/AC type single-phase energy-feeding converter are turned off, and the power switching device V 4 is turned on, which becomes a DC/DC type load converter Converter and DC/AC single-phase energy-fed converter.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V7关断，功率开关器件 V8导通，则成为AC/DC型单相负载换流器和DC/DC型能馈换流器。The power switching device V 7 of the AC/DC single-phase load converter and the DC/AC single-phase energy-feeding converter is turned off, and the power switching device V 8 is turned on, which becomes an AC/DC single-phase load Inverter and DC/DC type energy-fed converter.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V3关断，功率开关器件 V4导通，则成为DC/DC型负载换流器和DC/AC型单相能馈换流器。The power switching device V 3 of the AC/DC type single-phase load converter and the DC/AC type single-phase energy-feeding converter are turned off, and the power switching device V 4 is turned on, which becomes a DC/DC type load converter Converter and DC/AC single-phase energy-fed converter.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V5关断，功率开关器件 V6导通，则成为AC/DC型单相负载换流器和DC/DC型能馈换流器。The AC/DC type single-phase load converter and the power switch device V5 of the DC/AC type single-phase energy-fed converter are turned off, and the power switch device V6 is turned on, which becomes an AC/DC type single-phase load Inverter and DC/DC type energy-fed converter.
本实用新型的有益效果：The beneficial effects of the utility model:
本实用新型构建了多种类型的负载结构，将能馈式和复用型电力电子负载系统结合起来，根据用户不同的需求，通过控制功率开关器件的导通和关断，将本实用新型的负载结构裂解为不同使用功能的电路系统，实现了在交流负载、直流负载、充电等不同工作模式下自由切换；解决了现有技术的电力电子负载都是针对单一类别电力电子负载，存在功能相对单一、设备利用率偏低、应用范围较小等技术问题。The utility model constructs various types of load structures, combines energy-feedback and multiplexing power electronic load systems, and controls the on and off of the power switching device according to different needs of users, and the utility model The load structure is split into circuit systems with different functions, which realizes free switching under different working modes such as AC load, DC load, and charging; solves the problem that the power electronic loads in the prior art are all aimed at a single type of power electronic load, and have relative functions. Technical problems such as singleness, low utilization rate of equipment, and small application range.
附图说明：Description of drawings:
图1 是本实用新型的AC/AC型带交流负载结构示意图；Fig. 1 is a structural schematic diagram of the AC/AC type belt AC load of the present utility model;
图2 是本实用新型的DC/DC型带直流负载与储能电池结构示意图；Fig. 2 is a schematic structural diagram of a DC/DC type with a DC load and an energy storage battery of the present invention;
图3 是本实用新型的DC/AC型带交流负载和直流负载结构示意图；Fig. 3 is a structural schematic diagram of the DC/AC type belt AC load and DC load of the present utility model;
图4 是本实用新型的AC/DC型带交流负载和直流负载结构示意图；Fig. 4 is the structure diagram of AC/DC type with AC load and DC load of the utility model;
图5 是本实用新型的DC/AC型带储能电池和交流负载结构示意图；Fig. 5 is a structural schematic diagram of a DC/AC type battery with energy storage and an AC load of the utility model;
图6 是本实用新型的AC/DC型带储能电池和交流负载结构示意图。Fig. 6 is a structural schematic diagram of an AC/DC battery with energy storage and an AC load of the utility model.
具体实施方式：detailed description:
一种单相多功能复用型电力电子负载，它包括负载换流器，所述负载换流器与能馈换流器连接，在负载换流器与能馈换流器之间并联有直流电容器。A single-phase multi-functional multiplexing type power electronic load, which includes a load converter, the load converter is connected to the energy-feeding converter, and a DC capacitor.
所述负载换流器为AC/DC型单相负载换流器，它包括四组反并联二极管的开关功率器件V1-V4和进线电抗器L1组成，进线电抗器L1一端与功率开关器件 V1和V2的中点相连接，功率开关器件 V3和V4中点由导线引出，功率开关器件 V1和V3位于上桥臂，功率开关器件 V2 和V4位于下桥臂；所述能馈换流器为DC/AC型单相能馈换流器，它包括四组反并联二极管的功率开关器件V5-V8和出线电抗器L2组成，出线电抗器L2一端与功率开关器件 V5和V6的中点相连接，功率开关器件 V7和V8中点由导线引出，功率开关器件 V5 和V7位于上桥臂，功率开关器件 V6 和V8位于下桥臂，系统可以实现一端模拟交流负载，一端实现能量回馈至电网，其具体实现方式见图1。交流负载端的两个接口分别连接交流电源和隔离变压器T1，隔离变压器T1上端接进线电抗器L1，L1与功率开关器件 V1与V2中点连接，隔离变压器下端与功率开关器件 V3与V4中点连接。功率开关器件 V1位于上桥臂，功率开关器件 V2位于下桥臂；功率开关器件 V3位于上桥臂，功率开关器件 V4位于下桥臂。直流电容器C并联接在AC/DC型单相负载换流器和DC/AC型单相能馈换流器的直流侧。能馈侧换流器通过出线电抗器L2及隔离变压器T2与交流电源连接；出线电抗L2的左侧与功率开关器件 V5与V6中点连接，出线电抗器L2的右侧与隔离变压器T2的上端连接；隔离变压器T2的下端端和功率开关器件 V7与V8中点连接；功率开关器件 V5位于上桥臂，功率开关器件 V6位于下桥臂；功率开关器件V7位于上桥臂，功率开关器件 V8位于下桥臂。系统可以实现通过负载换流器模拟交流负载，能馈换流器将剩余电能返回电网。The load converter is an AC/DC type single-phase load converter, which consists of four sets of anti-parallel diode switching power devices V 1 -V 4 and a line reactor L 1 , one end of the line reactor L 1 It is connected with the midpoint of the power switching devices V1 and V2 , the midpoint of the power switching devices V3 and V4 is led out by wires, the power switching devices V1 and V3 are located in the upper bridge arm, and the power switching devices V2 and V4 Located in the lower bridge arm; the energy-fed converter is a DC/AC single-phase energy-fed converter, which consists of four sets of anti-parallel diode power switching devices V 5 -V 8 and an outgoing line reactor L 2 , the outgoing line One end of the reactor L2 is connected to the midpoint of the power switching devices V5 and V6 , the midpoint of the power switching devices V7 and V8 is led out by a wire, the power switching devices V5 and V7 are located in the upper bridge arm, and the power switching devices V 6 and V 8 are located in the lower bridge arm. The system can simulate an AC load at one end and feed energy back to the grid at the other end. The specific implementation method is shown in Figure 1. The two interfaces on the AC load side are respectively connected to the AC power supply and the isolation transformer T 1 , the upper end of the isolation transformer T 1 is connected to the incoming line reactor L 1 , the L 1 is connected to the middle point of the power switching device V 1 and V 2 , the lower end of the isolation transformer is connected to the power switch Device V3 is midpoint connected to V4 . The power switching device V 1 is located in the upper bridge arm, the power switching device V 2 is located in the lower bridge arm; the power switching device V 3 is located in the upper bridge arm, and the power switching device V 4 is located in the lower bridge arm. The DC capacitor C is connected in parallel to the DC side of the AC/DC single-phase load converter and the DC/AC single-phase regenerative converter. The energy - feed side converter is connected to the AC power supply through the outgoing line reactor L2 and the isolation transformer T2 ; the left side of the outgoing line reactance L2 is connected to the midpoint of the power switching device V5 and V6 , and the right side of the outgoing line reactor L2 It is connected to the upper end of the isolation transformer T2 ; the lower end of the isolation transformer T2 is connected to the middle point of the power switching device V7 and V8 ; the power switching device V5 is located in the upper bridge arm, and the power switching device V6 is located in the lower bridge arm; the power switching device V7 is located in the upper bridge arm, and the power switching device V8 is located in the lower bridge arm. The system can realize the simulation of AC load through the load converter, and the energy-feeding converter returns the remaining electric energy to the grid.
D1-D8为反并联二极管。D1-D8 are anti-parallel diodes.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V3关断，功率开关器件 V4导通，功率开关器件 V5关断，功率开关器件 V6导通，则成为DC/DC型负载换流器和DC/DC型能馈换流器。The power switch device V 3 of the AC/DC type single-phase load converter and the DC/AC type single-phase energy-fed converter is turned off, the power switch device V 4 is turned on, the power switch device V 5 is turned off, and the power When the switching device V 6 is turned on, it becomes a DC/DC type load converter and a DC/DC type regenerative converter.
具体主电路图如附图2所示，该图为本实用新型DC/DC型带直流负载与储能电池结构示意图。直流负载的左侧的两个接口分别连接直流电源的两端，直流负载的右侧上端连接进线直流电抗器L1的左侧，直流负载右侧下端连接功率开关器件 V2与V6中点，电抗器L1的右侧和功率开关器件 V1与V2中点连接。功率开关器件V1位于上桥臂，功率开关器件 V2位于下桥臂。直流电容器C并连接在（DC/DC型）负载换流器和(DC/DC型)能馈换流器的直流侧。能馈换流器通过出线电抗器L2与直流电源连接；出线电抗器L2的左侧端与功率开关器件V7与V8中点连接，出线电抗器L2的右侧与直流电源相连；功率开关器件 V7位于上桥臂，功率开关器件 V8位于下桥臂。系统可以实现模拟直流负载的同时，能馈换流器将剩余电能返回电网。The specific main circuit diagram is shown in Figure 2, which is a structural schematic diagram of the DC/DC type with DC load and energy storage battery of the utility model. The two interfaces on the left side of the DC load are respectively connected to both ends of the DC power supply, the upper end on the right side of the DC load is connected to the left side of the incoming line DC reactor L1, and the lower end on the right side of the DC load is connected to the power switching devices V2 and V6 Point, the right side of the reactor L1 and the middle point of the power switching device V1 and V2 are connected. The power switching device V 1 is located in the upper bridge arm, and the power switching device V 2 is located in the lower bridge arm. The DC capacitor C is also connected to the DC side of the (DC/DC type) load converter and the (DC/DC type) energy-fed converter. The energy - fed converter is connected to the DC power supply through the outgoing line reactor L2 ; the left side of the outgoing line reactor L2 is connected to the midpoint of the power switching device V7 and V8, and the right side of the outgoing line reactor L2 is connected to the DC power supply ; The power switching device V 7 is located in the upper bridge arm, and the power switching device V 8 is located in the lower bridge arm. While the system can realize the simulation of DC load, the energy-fed converter returns the remaining electric energy to the grid.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V3关断，功率开关器件 V4导通，则成为DC/DC型负载换流器和DC/AC型单相能馈换流器。The power switching device V 3 of the AC/DC type single-phase load converter and the DC/AC type single-phase energy-feeding converter are turned off, and the power switching device V 4 is turned on, which becomes a DC/DC type load converter Converter and DC/AC single-phase energy-fed converter.
具体主电路图如附图3所示，该图为本实用新型DC/AC型带交流负载和直流负载结构示意图。直流负载的左侧的两个接口分别连接直流电源的两端，直流负载的右侧上端连接进线直流电抗器L1的左侧，直流负载右侧下端连接功率开关器件 V2与V6中点，电抗器L1的右侧和功率开关器件 V1与V2中点连接，功率开关器件V1位于上桥臂，功率开关器件 V2位于下桥臂。直流电容器C并连接在DC/DC型单相负载换流器和DC/AC型单相能馈换流器的直流侧。能馈侧换流器通过出线电抗器L2及隔离变压器T2与交流电源连接；出线电抗L2的左侧与功率开关器件 V5与V6中点连接，出线电抗器L2的右侧与隔离变压器T2的上端连接；隔离变压器T2的下端端和功率开关器件 V7与V8中点连接；功率开关器件 V5位于上桥臂，功率开关器件 V6位于下桥臂；功率开关器件 V7位于上桥臂，功率开关器件 V8位于下桥臂。系统可以实现通过负载换流器模拟直流负载，能馈换流器将剩余电能返回电网。The specific main circuit diagram is shown in accompanying drawing 3, which is a structural schematic diagram of the DC/AC type with AC load and DC load of the utility model. The two interfaces on the left side of the DC load are respectively connected to both ends of the DC power supply, the upper end on the right side of the DC load is connected to the left side of the incoming line DC reactor L1, and the lower end on the right side of the DC load is connected to the power switching devices V2 and V6 point, the right side of the reactor L1 is connected to the midpoint of the power switching devices V1 and V2, the power switching device V1 is located in the upper bridge arm, and the power switching device V2 is located in the lower bridge arm. The DC capacitor C is also connected to the DC side of the DC/DC single-phase load converter and the DC/AC single-phase regenerative converter. The energy - feed side converter is connected to the AC power supply through the outgoing line reactor L2 and the isolation transformer T2 ; the left side of the outgoing line reactance L2 is connected to the midpoint of the power switching device V5 and V6 , and the right side of the outgoing line reactor L2 It is connected to the upper end of the isolation transformer T2 ; the lower end of the isolation transformer T2 is connected to the middle point of the power switching device V7 and V8 ; the power switching device V5 is located in the upper bridge arm, and the power switching device V6 is located in the lower bridge arm ; the power The switching device V 7 is located in the upper bridge arm, and the power switching device V 8 is located in the lower bridge arm. The system can realize the simulation of DC load through the load converter, and the energy-feeding converter returns the remaining electric energy to the grid.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率The power of the AC/DC type single-phase load converter and the DC/AC type single-phase energy-fed converter
开关器件 V7关断，功率开关器件 V8导通，则成为AC/DC型单相负载换流器和DC/DC型能馈换流器。The switching device V 7 is turned off, and the power switching device V 8 is turned on, thus becoming an AC/DC type single-phase load converter and a DC/DC type regenerative converter.
具体主电路图如附图4所示，该图为本实用新型AC/DC型带交流负载和直流负载结构示意图。交流负载端的两个接口分别连接交流电源和隔离变压器T1，隔离变压器T1上端接进线电抗器L1，L1与功率开关器件 V1与V2中点连接，隔离变压器下端与功率开关器件 V3与V4中点连接。功率开关器件 V1位于上桥臂，功率开关器件 V2位于下桥臂；功率开关器件 V3位于上桥臂，功率开关器件 V4位于下桥臂。直流电容器C并联接在AC/DC型单相负载换流器和DC/DC型单相能馈换流器的直流侧。能馈换流器通过出线电抗器L2与直流电源连接；出线电抗器L2的左侧端与功率开关器件V7与V8中点连接，出线电抗器L2的右侧与直流电源相连；功率开关器件V7位于上桥臂，功率开关器件 V8位于下桥臂。系统可以实现通过负载换流器模拟交流负载，能馈换流器将剩余电能返回电网。The specific main circuit diagram is shown in accompanying drawing 4, which is a structural schematic diagram of the AC/DC type with AC load and DC load of the utility model. The two interfaces on the AC load side are respectively connected to the AC power supply and the isolation transformer T 1 , the upper end of the isolation transformer T 1 is connected to the incoming line reactor L 1 , the L 1 is connected to the middle point of the power switching device V 1 and V 2 , the lower end of the isolation transformer is connected to the power switch Device V3 is midpoint connected to V4 . The power switching device V 1 is located in the upper bridge arm, the power switching device V 2 is located in the lower bridge arm; the power switching device V 3 is located in the upper bridge arm, and the power switching device V 4 is located in the lower bridge arm. The DC capacitor C is connected in parallel to the DC side of the AC/DC single-phase load converter and the DC/DC single-phase regenerative converter. The energy - fed converter is connected to the DC power supply through the outgoing line reactor L2 ; the left side of the outgoing line reactor L2 is connected to the midpoint of the power switching device V7 and V8, and the right side of the outgoing line reactor L2 is connected to the DC power supply ; The power switching device V 7 is located in the upper bridge arm, and the power switching device V 8 is located in the lower bridge arm. The system can realize the simulation of AC load through the load converter, and the energy-feeding converter returns the remaining electric energy to the grid.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V3关断，功率开关器件 V4导通，则成为DC/DC型负载换流器和DC/AC型单相能馈换流器。The power switching device V 3 of the AC/DC type single-phase load converter and the DC/AC type single-phase energy-feeding converter are turned off, and the power switching device V 4 is turned on, which becomes a DC/DC type load converter Converter and DC/AC single-phase energy-fed converter.
具体主电路图如附图5所示，该图为本实用新型DC/AC型带储能电池和交流负载结构示意图。储能电池右侧上端连接进线电抗器L1的左端，储能电池右侧上端连接功率开关器件V1与V2中点，进线电抗器L1的右端连接功率开关器件V2与V6中点。功率开关器件 V1位于上桥臂，功率开关器件 V2位于下桥臂。直流电容器C并联接在DC/DC型负载换流器和DC/AC型单相能馈换流器的直流侧。能馈侧换流器通过出线电抗器L2及隔离变压器T2与交流电源连接；出线电抗L2的左侧与功率开关器件 V5与V6中点连接，出线电抗器L2的右侧与隔离变压器T2的上端连接；隔离变压器T2的下端端和功率开关器件 V7与V8中点连接；功率开关器件 V5位于上桥臂，功率开关器件 V6位于下桥臂；功率开关器件 V7位于上桥臂，功率开关器件 V8位于下桥臂。系统可以实现通过负载换流器对储能电池进行充电，能馈换流器将剩余电能返回电网。The specific main circuit diagram is shown in accompanying drawing 5, which is a structural schematic diagram of a DC/AC type with energy storage battery and an AC load of the utility model. The upper right end of the energy storage battery is connected to the left end of the line reactor L1, the upper right end of the energy storage battery is connected to the midpoint of the power switching devices V1 and V2, and the right end of the line reactor L1 is connected to the power switching devices V2 and V 6 midpoint. The power switching device V 1 is located in the upper bridge arm, and the power switching device V 2 is located in the lower bridge arm. The DC capacitor C is connected in parallel to the DC side of the DC/DC type load converter and the DC/AC type single-phase regenerative converter. The energy - feed side converter is connected to the AC power supply through the outgoing line reactor L2 and the isolation transformer T2 ; the left side of the outgoing line reactance L2 is connected to the midpoint of the power switching device V5 and V6 , and the right side of the outgoing line reactor L2 It is connected to the upper end of the isolation transformer T2 ; the lower end of the isolation transformer T2 is connected to the middle point of the power switching device V7 and V8 ; the power switching device V5 is located in the upper bridge arm, and the power switching device V6 is located in the lower bridge arm ; the power The switching device V 7 is located in the upper bridge arm, and the power switching device V 8 is located in the lower bridge arm. The system can realize the charging of the energy storage battery through the load converter, and the energy-feeding converter returns the remaining electric energy to the grid.
所述AC/DC型单相负载换流器和DC/AC型单相能馈换流器的功率开关器件 V5关断，功率开关器件 V6导通，则成为AC/DC型单相负载换流器和DC/DC型能馈换流器。The AC/DC type single-phase load converter and the power switch device V5 of the DC/AC type single-phase energy-fed converter are turned off, and the power switch device V6 is turned on, which becomes an AC/DC type single-phase load Inverter and DC/DC type energy-fed converter.
具体主电路图如附图6所示，该图为本实用新型AC/DC型带储能电池和交流负载结构示意图。交流负载端的两个接口分别连接交流电源和隔离变压器T1，隔离变压器T1上端接进线电抗器L1，L1与功率开关器件 V1与V2中点连接，隔离变压器下端与功率开关器件 V3与V4中点连接。功率开关器件 V1位于上桥臂，功率开关器件 V2位于下桥臂；功率开关器件 V3位于上桥臂，功率开关器件 V4位于下桥臂。直流电容器C并联接在AC/DC型单相负载换流器和DC/DC型单相能馈换流器的直流侧。能馈换流器通过出线电抗器L2与储能电池连接；出线电抗器L2的左侧端与功率开关器件V7与V8中点连接，出线电抗器L2的右侧与储能电池相连；功率开关器件 V7位于上桥臂，功率开关器件 V8位于下桥臂。系统可以在图5的基础上互换储能电池和交流负载位置，可以实现模拟交流负载的同时，实现对储能电池进行充电。The specific main circuit diagram is shown in accompanying drawing 6, which is a structural schematic diagram of an AC/DC type with energy storage battery and an AC load of the utility model. The two interfaces on the AC load side are respectively connected to the AC power supply and the isolation transformer T 1 , the upper end of the isolation transformer T 1 is connected to the incoming line reactor L 1 , the L 1 is connected to the middle point of the power switching device V 1 and V 2 , the lower end of the isolation transformer is connected to the power switch Device V3 is midpoint connected to V4 . The power switching device V 1 is located in the upper bridge arm, the power switching device V 2 is located in the lower bridge arm; the power switching device V 3 is located in the upper bridge arm, and the power switching device V 4 is located in the lower bridge arm. The DC capacitor C is connected in parallel to the DC side of the AC/DC single-phase load converter and the DC/DC single-phase regenerative converter. The energy - fed converter is connected to the energy storage battery through the outgoing line reactor L2 ; the left end of the outgoing line reactor L2 is connected to the midpoint of the power switching device V7 and V8, and the right side of the outgoing line reactor L2 is connected to the energy storage battery The batteries are connected; the power switching device V 7 is located in the upper bridge arm, and the power switching device V 8 is located in the lower bridge arm. The system can exchange the position of the energy storage battery and the AC load on the basis of Figure 5, and can realize the charging of the energy storage battery while simulating the AC load.
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