Transformer power detection device

Abstract

The utility model discloses a transformer power detection device which comprises an electric energy meter, a micro-grid controller, a switching power supply and an independent switch, the electric energy meter is connected with a power supply through a three-phase four-wire electric wire and is connected with a communication signal port of the micro-grid controller through a signal wire, and the micro-grid controller is connected with an anode and a cathode of the switching power supply through electric wires; the switching power supply is connected with anodes and cathodes of the independent switches through wires; the independent switches are connected with a power supply through wires; wherein the electric energy meter is a secondary mutual inductance meter and is used for acquiring electricity utilization power data of the transformer. The electric energy meter adopting the secondary mutual inductance meter can acquire the electricity utilization power data of the transformer, the acquired electricity utilization power data is transmitted to the micro-grid controller, and the secondary mutual inductance meter and the advanced micro-grid controller are designed and used, so that the detected and acquired data has high accuracy and authenticity.

Description

Technical Field

[0001] This utility model relates to the field of electrical power detection technology, specifically to a transformer power detection device. Background Technology

[0002] Traditional power grid data collection typically involves power grid workers installing meters, resulting in generalized data that lacks precision down to the power consumption of each transformer, leading to significant errors and poor observability. Currently, there is a lack of commercially available testing devices capable of remotely viewing transformer power consumption curves. Therefore, there is an urgent need for a simple, low-cost, and highly adaptable transformer power detection device to address the information error issues of traditional data and achieve more refined and precise data. Utility Model Content

[0003] The purpose of this invention is to provide a transformer power detection device to solve the problems of inaccurate data and inability to remotely view data in the prior art.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A transformer power detection device includes an energy meter, a microgrid controller, a switching power supply, and an independent switch. The energy meter is connected to the power supply via a three-phase four-wire cable and to the communication signal port of the microgrid controller via a signal line. The microgrid controller is connected to the positive and negative terminals of the switching power supply via wires. The switching power supply is connected to the positive and negative terminals of the independent switch via wires. The independent switch is connected to the power supply via wires.

[0006] The energy meter is a secondary mutual inductance meter used to collect power consumption data of the transformer.

[0007] As a further embodiment of this utility model: the energy meter includes a secondary current transformer, and the current transformer circuit of the transformer main cabinet is connected to the secondary current transformer via a snap-fit ​​connection.

[0008] As a further embodiment of this utility model: the energy meter has a built-in programmable memory that stores a unique device address and transformer ratio parameters. The ratio parameters are used to proportionally correct the current / voltage signals collected by the secondary transformer and output a standard metering value.

[0009] As a further embodiment of this utility model: the microgrid controller is based on the Allwinner A40 i processor and has at least one of RS485, CAN, Ethernet, 4G, USB, and input / output interfaces.

[0010] As a further embodiment of this utility model: the switching power supply is an NKY2 series DIN rail type DC power supply.

[0011] As a further aspect of this invention: the signal line is used to transmit data signals between the energy meter and the advanced microgrid controller.

[0012] As a further aspect of this invention, the independent switch is used to control the power supply to and from the entire device.

[0013] As a further embodiment of this invention: the communication interface of the microgrid controller adopts an optocoupler isolation circuit, and the input and output terminals are equipped with TVS diode protection.

[0014] As a further embodiment of this invention, the device also includes a background data management system for remotely viewing the power consumption curve of the transformer.

[0015] As a further aspect of this utility model, the device is designed as a modular unit.

[0016] The beneficial effects of this utility model are:

[0017] (1) The energy meter using the secondary mutual inductance meter in this application can collect the power consumption data of the transformer. The collected power consumption data is transmitted to the microgrid controller. Through the design and use of the secondary mutual inductance meter and the advanced microgrid controller, the data obtained by detection has high accuracy and authenticity.

[0018] (2) The background data management system of this application communicates with the microgrid controller, which can support remote viewing of the power consumption curve in the background, facilitating data management and analysis;

[0019] (3) This application can adopt a modular design, which is highly adaptable and can be flexibly applied to different transformer testing needs. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the electrical principle of this utility model;

[0022] Figure 2 This is an example of the power curve interface of the background system of this utility model.

[0023] In the diagram: 10, electricity meter; 20, microgrid controller; 30, switching power supply; 40, independent switch; 50, power supply. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention / utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] Example 1

[0028] Please see Figure 1 As shown, this utility model is a transformer power detection device, including an energy meter 10, a microgrid controller 20, a switching power supply 30, and an independent switch 40. The energy meter 10 is connected to the power supply 50 via a three-phase four-wire cable and to the communication signal port of the microgrid controller 20 via a signal line. The microgrid controller 20 is connected to the positive and negative terminals of the switching power supply 30 via wires. The switching power supply 30 is connected to the positive and negative terminals of the independent switch 40 via wires. The independent switch 40 is connected to the power supply 50 via wires. The energy meter 10 is a secondary current transformer meter used to collect the power consumption data of the transformer.

[0029] In the process of using the device of this application, the wires (live wire and neutral wire) of the independent switch 40 are connected to the power supply 50; the three-phase four-wire wire of the energy meter 10 is connected to the power supply 50; the secondary current transformer clip is connected to the current transformer line of the transformer main cabinet; the energy meter 10 is connected to the microgrid controller 20 through the signal line; the microgrid controller 20 is connected to the switching power supply 30, and the switching power supply 30 is connected to the independent switch 40; so that the energy meter 10 using the secondary current transformer can collect the power consumption data of the transformer, and the collected power consumption data is transmitted to the microgrid controller 20. Through the design and use of the secondary current transformer and the advanced microgrid controller 20, the detected data has high accuracy and authenticity.

[0030] Example 2

[0031] The energy meter 10 includes a secondary current transformer and is connected to the transformer circuit of the main transformer cabinet via a secondary current transformer clip. The energy meter 10 has a built-in programmable memory that stores a unique device address and transformer ratio parameters. The ratio parameters are used to proportionally correct the current / voltage signals collected by the secondary current transformer and output standard metering values. The energy meter 10 collects the CT / PT signals of the main transformer cabinet through the secondary current transformer clip, converts them into measurable low voltage / current, and then calculates accurate electricity consumption data to ultimately achieve safe and efficient transformer power detection. The calculated electricity consumption data is output through the ratio parameters, thereby outputting standard metering values.

[0032] In this embodiment, the secondary transformer can use a spring clip (material: PA66) with an inner diameter of 8mm, which is compatible with standard CT secondary lines.

[0033] Example 3

[0034] The microgrid controller 20 is based on the Allwinner A40 i processor and has at least one of RS485, CAN, Ethernet, 4G, USB, and digital input / output interfaces; the switching power supply 30 is an NKY2 series DIN rail type DC power supply 50; the signal line is used to transmit data signals between the energy meter 10 and the advanced microgrid controller 20; the independent switch 40 is used to control the power supply 50 of the entire device; the communication interface of the microgrid controller 20 adopts an optocoupler isolation circuit, and the input and output terminals are equipped with TVS diode protection. In this embodiment, the microgrid controller 20 can automatically read the data of the energy meter 10 and can operate stably for a long time in harsh environments.

[0035] In this embodiment, the microgrid controller 20 uses an Allwinner A40 i industrial-grade processor (quad-core Cortex-A7, 1.2GHz), with a built-in hardware floating-point unit, supporting real-time data encryption; the switching power supply 30 can be an NKY2-24D05 DIN rail power supply, with an input of AC220V (±15%) and an output of DC24V / 5A (120W); conversion efficiency ≥85%, ripple noise <150mVp-p; signal cable type: RVVP 2×0.5mm 2 (Twisted pair shielded cable), used for RS485 communication.

[0036] Example 4

[0037] See Figure 2As shown, the device also includes a background data management system for remotely viewing the power consumption curve of the transformer. The microgrid controller 30 communicates with the remote server of the background data management system via a 4G module. The server is configured with a database and a Web interface to store and display the power consumption data uploaded by the energy meter 10 and generate a time-power curve. Therefore, after the microgrid controller 20 in this application automatically reads the data from the energy meter 10, it can upload it to the background data management system via a 4G module (model: EC20) to facilitate remote viewing of the power consumption curve of the transformer, thereby achieving the purpose of remote monitoring in this application. The 4G communication supports data upload once per second, and the background displays the power curve in real time.

[0038] Example 5

[0039] The device is modular in design, which facilitates installation and disassembly. In the modular design process, the energy meter 10, the advanced microgrid controller 20 and the switching power supply 30 can all adopt a rail mounting structure. The modules are connected by plug-in terminals, and the interface definition complies with the IEC 60715 standard. This application adopts a modular design, which has strong adaptability and can be flexibly applied to different transformer testing needs.

[0040] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A transformer power detection device, characterized in that, The system includes an electricity meter (10), a microgrid controller (20), a switching power supply (30), and an independent switch (40). The electricity meter (10) is connected to the power supply (50) via a three-phase four-wire cable and to the communication signal port of the microgrid controller (20) via a signal line. The microgrid controller (20) is connected to the positive and negative terminals of the switching power supply (30) via a wire. The switching power supply (30) is connected to the positive and negative terminals of the independent switch (40) via a wire. The independent switch (40) is connected to the power supply (50) via a wire. The electricity meter (10) is a secondary mutual inductance meter used to collect the power consumption data of the transformer.

2. The transformer power detection device according to claim 1, characterized in that, The electricity meter (10) includes a secondary transformer and is connected to the transformer main cabinet transformer line via the secondary transformer snap-fit.

3. The transformer power detection device according to claim 2, characterized in that, The energy meter (10) has a built-in programmable memory that stores a unique device address and transformer ratio parameters. The ratio parameters are used to proportionally correct the current / voltage signals collected by the secondary transformer and output standard metering values.

4. The transformer power detection device according to claim 1, characterized in that, The microgrid controller (20) is based on the Allwinner A40 i processor and has at least one of RS485, CAN, Ethernet, 4G, USB, and digital input / output interfaces.

5. The transformer power detection device according to claim 1, characterized in that, The switching power supply (30) is an NKY2 series DIN rail type DC power supply (50).

6. The transformer power detection device according to claim 1, characterized in that, The signal line is used to transmit data signals between the energy meter (10) and the advanced microgrid controller (20).

7. The transformer power detection device according to claim 1, characterized in that, The independent switch (40) is used to control the power supply (50) of the entire device.

8. The transformer power detection device according to claim 1, characterized in that, The communication interface of the microgrid controller (20) adopts an optocoupler isolation circuit, and the input and output terminals are protected by TVS diodes.

9. A transformer power detection device according to claim 1, characterized in that, The device also includes a background data management system for remotely viewing the power consumption curve of the transformer.

10. A transformer power detection device according to claim 1, characterized in that, The device is designed as a modular unit.

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