An inverter detection device

Abstract

The utility model relates to inverter detection field discloses a device for inverter detection, including the connecting piece of Y type, and the both ends of connecting piece are provided as single line and double line respectively, and connecting piece includes positive connecting piece and negative connecting piece, and positive connecting piece and negative connecting piece connect the positive and negative pole of photovoltaic module and inverter respectively, wherein one end of single line is connected to photovoltaic module, and one end of double line is connected to inverter, and one end of double line of positive grade connecting piece has at least one current connecting component, and current connecting component is used for connecting with the current end of analysis appearance, and one end of double line of positive grade connecting piece and negative connecting piece has at least one voltage end between the selection connection of inverter and analysis appearance respectively. Avoid destroying the insulation layer access line of circuit, can avoid the electric shock of operator, and also do not need to turn off branch power supply, will not cause the loss of electric energy.

Description

Technical Field

[0001] This utility model relates to the field of inverter monitoring, and specifically to an inverter testing device. Background Technology

[0002] A photovoltaic module consists of several photovoltaic panels connected in series or in parallel. The positive and negative terminals of the photovoltaic module are connected to the inverter. The photovoltaic module absorbs solar energy and converts it into DC voltage and current. The photovoltaic module outputs DC power to the inverter. The inverter goes through steps such as DC boost, DC-AC inversion, voltage stabilization and filtering, and finally outputs the current to the power grid to meet the needs of the electrical equipment.

[0003] For power plants with complex installation environments, such as rooftop photovoltaic (PV) systems, there are various tilt angles for installation. Tilting installation can also cause buildings to cast shadows on the PV modules. In addition to these factors, it is necessary to regularly test the inverter's conversion efficiency and power quality. However, when regularly testing the inverter's conversion efficiency and power quality in a PV power plant, an analyzer needs to be connected between the inverter and the PV modules to test the inverter's efficiency and performance. During the test, the inverter's voltage circuit needs to be connected to the testing instrument.

[0004] Because the inverter testing interval is relatively long, the testing equipment is not permanently connected between the two. Instead, it is connected to the circuit only during testing. This requires connecting the inverter's current and voltage to the analyzer separately. When connecting the voltage, the insulation layer of the circuit is cut to connect the testing circuit. Both of these connection methods can cause electric shock accidents and are cumbersome to operate. Based on this, the following improvements are proposed. Utility Model Content

[0005] The present invention aims to provide an inverter testing device to solve the problems of branch power outage and line damage when connecting to the testing line in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an inverter testing device, comprising a Y-shaped connector, with one end of the connector configured as a single wire and the other as a double wire. The connector includes a positive terminal connector and a negative terminal connector, which respectively connect the positive and negative terminals of the photovoltaic module and the inverter. One end of the single wire is connected to the photovoltaic module, and one end of the double wire is connected to the inverter. At least one of the double wires at one end of the positive terminal connector is provided with a current connection component, which is used to connect to the current terminal of an analyzer. At least one of the double wires of the positive terminal connector is connected to the analyzer; at least one of the double wires of the negative terminal connector is also connected to the analyzer.

[0007] The beneficial effects of this solution are as follows: By connecting the analyzer to the inverter's current and voltage respectively, the active power on the inverter's DC side can be measured. By comparing this with the active power output on the inverter's AC side, the inverter's energy conversion efficiency can be measured. When connecting the analyzer to the inverter circuit, simply unplug one of the positive wires and one of the negative wires plugged into the inverter. Then, connect the unplugged positive and negative wires to the analyzer to measure the inverter's voltage. Compared with existing technologies, this design avoids damaging the insulation layer of the circuit, prevents electric shock to operators, and eliminates the need to turn off the branch power supply, thus preventing energy loss.

[0008] Preferably, as an improvement, it also includes a housing, the side walls of which are respectively provided with a plurality of first positive connectors and first negative connectors, the first positive connectors and first negative connectors being used to connect to the positive and negative terminals of the inverter, and the side walls of the housing are also provided with second positive connectors and second negative connectors, the second positive connectors and second negative connectors being used to connect to the positive and negative terminals of the analyzer voltage terminal, respectively.

[0009] Preferably, as an improvement, the positive electrode connector and the negative electrode connector are arranged in parallel on the housing, and at least one end of the two wires of the positive electrode connector is fixedly connected to the first positive connector, and at least one end is selectively connected to another first positive connector or a second positive connector.

[0010] The beneficial effects are as follows: there are several first positive terminals, and at least one positive terminal connector can be selectively connected to one of the positive terminals or the second positive terminal. That is, at least one end of the two wires of the positive terminal connector can be selectively connected to the inverter or the analyzer. The connected object can be controlled by adjustment. The operation is simple, efficient, and has a low risk of electric shock.

[0011] Preferably, as an improvement, at least one end of the two wires of the negative terminal connector is fixedly connected to the first negative terminal, and at least one end is selectively connected to another first negative terminal or a second negative terminal.

[0012] The beneficial effects are as follows: there are several first negative terminals, and at least one of the negative terminal connectors can be selectively connected to one of the negative terminals or the second negative terminal. That is, at least one end of the two wires of the negative terminal connector can be selectively connected to the inverter or the analyzer. The connected object can be controlled by adjustment. The operation is simple, efficient and has a low risk of electric shock.

[0013] Preferably, as an improvement, the first positive connector includes connector one and connector two, the first negative connector includes connector three and connector four, one end of the double wires of the positive electrode connector includes positive wire one and positive wire two, and one end of the double wires of the negative electrode connector includes negative wire one and negative wire two.

[0014] Preferably, as an improvement, positive wire 1 is fixedly connected to connector 1, and positive wire 2 is rotatably connected to a connecting rod 1, which is selectively connected to connector 2 or the second positive connector; negative wire 1 is rotatably connected to a connecting rod 2, which is selectively connected to connector 3 or the second negative connector, and negative wire 2 is fixedly connected to connector 4.

[0015] The beneficial effects are as follows: Connecting rod one and connecting rod two are respectively rotatably set on positive line two and negative line one. By adjusting, positive line two can be connected to connector two or positive line two to the second positive connector. Similarly, by adjusting, negative line one can be connected to connector three or negative line one to the second negative connector. The operation is convenient, efficient and reduces the risk of electric shock.

[0016] Preferably, as an improvement, the housing is equipped with a drive unit, which is used to simultaneously drive connecting rod one and connecting rod two to rotate.

[0017] The beneficial effects are: the driving component simultaneously drives both connecting rod one and connecting rod two to rotate, which saves operating steps and simplifies the operation process.

[0018] Preferably, as an improvement, the driving component is a motor, and the ends of connector two, connector three, the second positive connector, and the second negative connector are all provided with connecting grooves for the connecting rod to be inserted.

[0019] Preferably, as an improvement, the current connection assembly includes a current sensor, a positive current connector, and a negative current connector. The current sensor is sleeved on the outside of the positive wire, and the positive current connector, the negative current connector, and the current sensor are connected by a wire. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model applied between a photovoltaic module and an inverter; Figure 2 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model; Figure 3 This is a top cross-sectional view of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the internal structure of an embodiment of the present utility model; Figure 5 for Figure 4 A partial structural diagram of the motor driving the connecting rod to rotate at point A. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: housing 1, current assembly 11, current sensor 111, positive current connector 112, negative current connector 113, first positive connector 12, connector one 121, connector two 122, first negative connector 13, connector three 131, connector four 132, second positive connector 14, second negative connector 15, motor 16, positive terminal connector 2, positive wire one 21, positive wire two 22, connecting rod one 221, negative terminal connector 3, negative wire one 31, connecting rod two 311, negative wire two 32, photovoltaic module 4, inverter 5, power analyzer 6.

[0022] Example 1 like Figure 1 An inverter testing device is shown, comprising a connector connecting a photovoltaic module 4 and an inverter 5. The connector has a single-wire and a double-wire connection at both ends. One end of the single-wire connector is connected to the photovoltaic module 4, and the other end of the double-wire connector is connected to the inverter 5. In the prior art, the inverter 5 has multiple positive terminals connected in parallel, and multiple negative terminals also connected in parallel. The connector includes a positive terminal connector 2 and a negative terminal connector 3. One end of the single wire of the positive terminal connector 2 is connected to the DC positive terminal of the photovoltaic module 4. One end of the double wire of the 2 includes positive wire 1 21 and positive wire 22. The end of positive wire 1 21 is inserted into the positive interface of the inverter 5, and positive wire 22 is selectively inserted into the positive interface of the inverter 5 or the positive interface of the analyzer. One end of the single wire of the negative connector 3 is connected to the DC negative terminal of the photovoltaic panel. One end of the double wire of the negative connector 3 includes negative wire 1 31 and negative wire 2 32. The end of negative wire 1 31 is inserted into the negative interface of the inverter 5, and negative wire 2 32 is selectively inserted into the negative interface of the inverter 5 or the negative interface of the analyzer.

[0023] A current assembly 11 is provided between the positive line 21 of the positive connector 2 and the analyzer. The current assembly 11 includes a current sensor 111. The current sensor 111 is sleeved on the outer ring of the positive line 21 and is connected to the current terminal of the analyzer. The current sensor 111 is used to detect the magnitude of the current flowing into the inverter 5.

[0024] The specific implementation process is as follows: When the analyzer is connected to the inverter 5, the positive wire 22 and the negative wire 32 are disconnected from the inverter 5 and inserted into the positive and negative terminals of the analyzer respectively, thereby connecting the DC terminal voltage of the inverter 5 into the analyzer. The current at the DC terminal of the inverter 5 is connected to the analyzer through the current component 11. The analyzer calculates the active power at the DC terminal of the inverter 5 based on the current and voltage, and then compares it with the active power at the AC terminal of the inverter 5 to calculate the power conversion efficiency of the inverter 5.

[0025] Example 2 like Figure 2 , Figure 4 As shown, the difference between Embodiment 2 and Embodiment 1 is that: an inverter testing device further includes a housing 1, a positive terminal connector 2 and a negative terminal connector 3 mounted in parallel on the housing 1, wherein one end of each single wire of the connector passes through the side wall of the housing 1, a first positive connector 12 and a first negative connector 13 are fixedly installed on the side wall of the housing 1, and a second positive connector 14 and a second negative connector 15 are fixedly installed on the other side wall perpendicular to it. The first positive connector 12 and the first negative connector 13 are used to connect to the positive and negative terminals of the inverter 5, and the second positive connector 14 and the second negative connector 15 are used to connect to the positive and negative terminals of the analyzer, and the first positive connector 12, the first negative connector 13, the second positive connector 14, and the second negative connector 15 all penetrate through the side wall of the housing 1.

[0026] like Figures 2-4 As shown, the first positive connector 12 includes connector 121 and connector 122. The positive wire 21 of the positive electrode connector 2 and the end of connector 121 located inside the box are fixedly connected. The end of positive wire 22 is rotatably connected to connecting rod 221. Connector 222 and the second positive electrode are located at the same height inside the box 1, and the ends of both connectors inside the box are provided with connecting grooves for connecting rod 221 to be inserted. The width of the connecting grooves is equal to the width of connecting rod 221. The first negative connector 13 includes connector 311 and connector 42. The end of negative wire 31 of the negative electrode connector 3 is rotatably connected to connecting rod 311. Connector 311 and the second negative connector 15 are located at the same height inside the box 1, and the ends of both connectors inside the box 1 are provided with connecting grooves for connecting rod 311 to be inserted. The width of the connecting grooves is also equal to the width of connecting rod 311. The end of negative wire 32 of the negative electrode connector 3 and the end of connector 42 located inside the box 1 are fixedly connected.

[0027] like Figures 4-5 As shown, housing 1 is equipped with a mounting platform, on which a motor 16 is mounted. Both ends of the motor 16 have output shafts rotating in the same direction. The ends of the positive wire 22 and the negative wire 31 are each equipped with a rotating shaft. Connecting rod 221 and connecting rod 311 are fixed to their respective rotating shafts, thus driving rotation through the shafts. Both ends of the motor 16 are connected to the rotating shafts on the positive wire 22 and the negative wire 31, respectively, thereby driving the connecting rods 221 and 311 to rotate. The outer wall of housing 1 is provided with an opening... The switch contains a mainboard with a battery and a sensor, and a program is written into the mainboard. The mainboard is connected to the motor 16, and the switch controls the rotation of the motor 16 through the mainboard. The current sensor 111 is fixedly installed on the inner wall of the housing 1 and sleeved on the positive wire 21. The side wall of the housing 1 is also fixedly provided with a positive current connector 112 and a negative current connector 113. Both the positive current connector 112 and the negative current connector 113 are connected to the current sensor 111 through the circuit and are used to connect to the current terminal of the analyzer.

[0028] Its working principle is as follows: When the voltage of the analyzer needs to be connected to the inverter 5, press the power switch, the motor 16 rotates and drives the connecting rod 221 and the connecting rod 311 to rotate at the same time. Therefore, the branches of the positive terminal connector 2 and the negative terminal connector 3 are connected to the second positive terminal 14 and the second negative terminal 15 at the same time, which is simple and convenient to operate.

[0029] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An inverter testing device, characterized in that: The device includes a Y-shaped connector with a single wire at one end and a double wire at the other. The connector includes a positive terminal connector and a negative terminal connector, which connect the positive and negative terminals of the photovoltaic module and the inverter, respectively. One end of the single wire is connected to the photovoltaic module, and one end of the double wire is connected to the inverter. At least one of the double wires at one end of the positive terminal connector is equipped with a current connection component, which is used to connect to the current terminal of the analyzer. At least one of the double wires of the positive terminal connector is connected to the analyzer. At least one of the double wires of the negative terminal connector is also connected to the analyzer.

2. The inverter testing device according to claim 1, characterized in that: It also includes a housing, with several first positive and first negative connectors respectively provided on the side walls of the housing. The first positive and first negative connectors are used to connect to the positive and negative terminals of the inverter, respectively. The side walls of the housing are also provided with second positive and second negative connectors, which are used to connect to the positive and negative terminals of the analyzer voltage terminal, respectively.

3. The inverter testing device according to claim 2, characterized in that: The positive and negative terminals are arranged in parallel on the housing. At least one of the two wires of the positive terminal is fixedly connected to the first positive connector, and at least one is selectively connected to another first positive connector or a second positive connector.

4. The inverter testing device according to claim 3, characterized in that: At least one of the two wires of the negative terminal connector is fixedly connected to the first negative terminal, and at least one is selectively connected to another first negative terminal or a second negative terminal.

5. The inverter testing device according to claim 4, characterized in that: The first positive connector includes connector one and connector two; the first negative connector includes connector three and connector four; one end of the double wires of the positive electrode connector includes positive wire one and positive wire two; and one end of the double wires of the negative electrode connector includes negative wire one and negative wire two.

6. The inverter testing device according to claim 5, characterized in that: Positive wire 1 is fixedly connected to connector 1, and positive wire 2 is rotatably connected to connector 1. Connecting rod 1 can be connected to connector 2 or the second positive connector. Negative wire 1 is rotatably connected to connector 2. Connecting rod 2 can be connected to connector 3 or the second negative connector. Negative wire 2 is fixedly connected to connector 4.

7. The inverter testing device according to claim 6, characterized in that: The housing is equipped with a drive unit, which is used to simultaneously drive connecting rod one and connecting rod two to rotate.

8. The inverter testing device according to claim 7, characterized in that: The driving component is a motor, and the ends of connectors two, three, the second positive connector, and the second negative connector are all provided with connecting grooves for the connecting rod to be inserted.

9. The inverter testing device according to claim 5, characterized in that: The current connection assembly includes a current sensor, a positive current connector, and a negative current connector. The current sensor is sleeved on the outside of the positive line, and the positive current connector, the negative current connector, and the current sensor are connected by wires.

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