An energy-saving and convenient aging monitoring system of a bidirectional inverter

Abstract

The utility model relates to two -way inverter test field provides an energy -conserving convenient two -way inverter's ageing monitoring system, including computer terminal, DC direct current source and multiple monitoring module, each monitoring module includes a communication control panel and two two -way inverters to be measured, two two -way inverters to be measured are respectively first inverter and second inverter, in each monitoring module, the communication control panel's 3 communication ports are connected with the communication port of computer terminal, first inverter and second inverter respectively, and the DC port of DC direct current source is connected with first inverter and second inverter respectively, the AC input port of first inverter is connected with the AC output port of second inverter, and the AC input port of second inverter is connected with the AC output port of first inverter, the utility model can realize energy recycling, and multiple inverters are monitored simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of bidirectional inverter testing, and more specifically, to an energy-saving and convenient aging monitoring system for bidirectional inverters. Background Technology

[0002] A bidirectional inverter is a power conversion device that can convert direct current (DC) power to alternating current (AC) power, and vice versa. It plays an important role in many applications.

[0003] For bidirectional energy storage inverters, aging tests during mass production can detect potential issues such as poor soldering, component parameter deviations, and unreliable wiring connections. This ensures the bidirectional inverter maintains stable performance during continuous operation, with parameters such as output voltage fluctuations, conversion efficiency, and charge / discharge efficiency meeting requirements. Aging is crucial for assessing and improving the inverter's reliability, stability, and lifespan.

[0004] Currently, the following methods are used for aging tests of bidirectional inverters: Each inverter has its DC input connected to a DC power source and its AC output connected to a load for inverter discharge aging tests; the AC input is connected to mains or an AC power source, and the DC output is connected to a load for charging aging tests. This method not only requires configuring a DC power source, AC power source, and load for each unit, but also results in significant energy losses and high costs.

[0005] Connect the AC output of inverter A to the AC input of inverter B, connect the AC output of inverter B to the AC input of inverter C, and finally connect the AC output of inverter C to the load. This method allows multiple inverters to age simultaneously, but the power of each inverter will decrease progressively, resulting in insufficient power for subsequent aging tests. Utility Model Content

[0006] The problem solved by this invention is how to provide an aging monitoring system for bidirectional inverters that enables energy recycling, simultaneous operation of multiple inverters, and visualization of data from each inverter during operation.

[0007] To address the aforementioned problems, this utility model provides an energy-saving and convenient aging monitoring system for bidirectional inverters, comprising: a computer terminal, a DC power supply, and multiple monitoring modules. Each monitoring module includes a communication control board and two bidirectional inverters under test, namely a first inverter and a second inverter. In each monitoring module, the three communication ports of the communication control board are respectively connected to the communication ports of the computer terminal, the first inverter, and the second inverter to receive instructions from the computer terminal, control the operation of the first inverter and the second inverter, and transmit the detection information of the first inverter and the second inverter to the computer terminal. The DC power supply is connected to the DC ports of the first inverter and the second inverter respectively. The AC input port of the first inverter is connected to the AC output port of the second inverter, and the AC input port of the second inverter is connected to the AC output port of the first inverter.

[0008] Furthermore, the DC power supply is an AC-DC converter.

[0009] Furthermore, the communication control board includes a control module and three RS485 communication modules connected to the control module. The first RS485 communication module is connected to the communication port of the computer terminal, and the second and third RS485 communication modules are respectively connected to the RS485 communication ports of the first inverter and the second inverter.

[0010] Furthermore, the communication control board also includes two DIP switches, which are respectively installed on the second RS485 communication module and the third RS485 communication module to provide communication addresses for the corresponding inverters.

[0011] Furthermore, the computer terminal is equipped with an RS422 to RS485 converter module.

[0012] Compared with the prior art, the beneficial effects of this utility model are: Through the communication control board and 485 communication commands, the two inverters in the same monitoring module can switch between charging and inversion states during testing. When one inverter is inverting, the other inverter is charging. The monitoring information is transmitted to the computer via the communication control board, realizing energy recycling. The system only has energy loss of the inverter and no other losses. The data of each inverter can be monitored on the computer terminal, and the charging and discharging states of the inverter can be controlled and adjusted. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall principle structure of an embodiment of the present utility model; Figure 2This is a schematic diagram of the computer terminal display interface during the operation of an embodiment of this utility model. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative embodiment of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0017] like Figure 1 As shown, this utility model provides an energy-saving and convenient aging monitoring system for bidirectional inverters, including: a computer terminal, a DC power supply, several inverters under test and several communication control boards. Each communication control board is connected to two inverters under test to form a monitoring module. Figure 1 The document presents the structure of a set of monitoring modules. When multiple monitoring modules are used, the communication lines between each monitoring module and the computer terminal can be connected in parallel to the communication bus of the computer terminal to realize the control and monitoring of the inverters in multiple monitoring modules.

[0018] The DC power supply is an AC-DC converter, and the DC output port is connected to the DC port of each inverter.

[0019] The communication control board includes a main control module and is configured with three RS485 communication modules A, B, and C connected to the main control module, as well as two communication address DIP switches. RS485 communication module A is connected to the computer terminal communication bus, while RS485 communication modules B and C are connected to the communication ports of two inverters respectively. The DIP switches provide a communication address for each inverter.

[0020] The computer terminal is a Windows computer, equipped with an RS422 to RS485 converter module, with RS485 serving as the communication bus for the computer terminal.

[0021] The bidirectional inverters under test are all of the same type, each equipped with an AC input port, an AC output port, a DC port, and an RS485 communication port. Within each group, one inverter is designated as the first inverter, and the other as the second inverter. (Refer to...) Figure 1 The AC input of the first inverter is connected to the AC output of the second inverter in the same group, and the AC input of the second inverter is connected to the AC output of the first inverter. A typical bidirectional inverter generally includes a controller, a bidirectional inverter circuit, and a voltage and current detection circuit. The bidirectional inverter circuit usually adopts an H-bridge circuit topology (such as a full-bridge inverter circuit, which consists of four IGBT / MOSFET switches and anti-parallel diodes forming an H-bridge structure to achieve DC-AC bidirectional conversion). By controlling the switching devices, bidirectional energy flow is achieved. During charging, AC power enters through the AC input port, is converted into DC power by the bidirectional inverter circuit, and is output through the DC port. During inversion, DC power enters through the DC port, is inverted into AC power by the bidirectional inverter circuit, and is output through the AC output port. The controller is used to control the switching of the MOSFETs in the H-bridge circuit topology to achieve charging and inversion control. The voltage and current detection circuit collects voltage and current information at the AC input port, AC output port, and DC port and feeds it back to the controller. In this system, the bidirectional inverter under test also has an internal 485 communication module connected to the controller and connected to the inverter's 485 port for data exchange with the communication control board.

[0022] During the aging test, parameters are set on the computer terminal, including aging time, switching voltage, and power. After the aging test begins, the communication control board receives the parameter information and sends control commands to the corresponding inverters. In each group, one inverter starts inversion, and the other starts charging. After the switching time is reached, the inverter that was inverting switches to charging, and the inverter that was charging switches to inversion. After the aging time is reached, all inverters stop working. Throughout the aging process, the voltage and current detection information inside the inverters is transmitted to the communication control board via RS-485 communication and uploaded to the computer terminal. The real-time operating status information of each inverter is displayed on the computer terminal screen. The computer terminal screen display interface can be found for reference. Figure 2 .

[0023] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. An energy-saving and convenient aging monitoring system for a bidirectional inverter, characterized in that, include: The system includes a computer terminal, a DC power supply, and multiple monitoring modules. Each monitoring module comprises a communication control board and two bidirectional inverters under test (BTs), designated as a first inverter and a second inverter. In each monitoring module, the three communication ports of the communication control board are connected to the communication ports of the computer terminal, the first inverter, and the second inverter, respectively, to receive commands from the computer terminal, control the operation of the first and second inverters, and transmit the detection information of the first and second inverters to the computer terminal. The DC power supply is connected to the DC ports of the first and second inverters, respectively. The AC input port of the first inverter is connected to the AC output port of the second inverter, and the AC input port of the second inverter is connected to the AC output port of the first inverter.

2. The energy-saving and convenient aging monitoring system for bidirectional inverters according to claim 1, characterized in that, The DC power supply is an AC-DC converter.

3. The energy-saving and convenient aging monitoring system for bidirectional inverters according to claim 1, characterized in that, The communication control board includes a control module and three RS485 communication modules connected to the control module. The first RS485 communication module is connected to the communication port of the computer terminal, and the second and third RS485 communication modules are respectively connected to the RS485 communication ports of the first inverter and the second inverter.

4. The energy-saving and convenient aging monitoring system for bidirectional inverters according to claim 3, characterized in that, The communication control board also includes two DIP switches, which are respectively set on the second RS485 communication module and the third RS485 communication module to provide communication addresses for the corresponding inverters.

5. The energy-saving and convenient aging monitoring system for bidirectional inverters according to claim 3, characterized in that, The computer terminal is equipped with an RS422 to RS485 converter module.

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