Line loss checking detector based on multiple users at tail end of transformer area

Abstract

The invention discloses a multi-user line loss checking detector based on a station area tail end, and the detector is characterized in that the left part of the top surface of an instrument body is provided with two groups of three-phase voltage sampling interfaces, the middle part of the top surface of the instrument body is provided with an antenna interface, and the right part of the top surface of the instrument body is sequentially provided with an RS485 interface and an infrared communication interface; a seven-path three-phase electric energy metering circuit and a three-path voltage sampling circuit are arranged in the instrument body, the opening mutual inductor interface is connected with the seven-path three-phase electric energy metering circuit arranged in the instrument body, current collection is carried out by arranging multiple paths of opening current transformers, installation is convenient, lines and wiring do not need to be changed, and the cost is reduced. According to the equipment, seven paths of three-phase electric energy metering are arranged in the instrument body, so that multi-user metering of the same equipment is realized, the size is small, and no space is occupied; a plurality of infrared communication heads of an infrared communication line are arranged to collect data of a user intelligent electric energy meter at regular time and store the data in the equipment; and reading all stored data through the RS485 to carry out line loss calculation.

Description

Technical Field

[0001] The invention relates to the field related to voltage measuring devices, and in particular to a multi-user line loss troubleshooting detector based on an end of an area. Background Art

[0002] With the progress and development of the information age, people's lives and the operation of enterprises are increasingly inseparable from electricity. People's livelihood issues are receiving more and more attention, and residents' requirements for electricity consumption are gradually increasing. The way of using electricity has changed, and the number of people using electricity is also increasing and changing. The low efficiency of electricity consumption has affected the profits of enterprises and the quality of people's lives. Therefore, many difficulties have also arisen in the process of electricity inspection. It is of utmost importance to provide effective and reasonable solutions to this situation.

[0003] In the electricity inspection work, there are two major operational difficulties in detecting the operating conditions of equipment or meters. First, opening the seal of the metering device for contact measurement may cause the evidence of electricity theft to be destroyed, affecting the validity of the evidence; second, the public line voltage measurement requires piercing and contacting the wires, which may cause a certain risk of electric shock. In the voltage monitoring of low-voltage distribution networks, the power line voltage is high and the voltage range is wide. The contact measurement method must destroy the external insulation layer to contact the internal wires for measurement. The instrument is only isolated by a transformer or an isolation chip. There is electrical contact between the power supply under test and the measuring device. In some high-voltage occasions, if the operation is wrong, it will cause damage to the equipment and testers on the circuit under test; in the process of destroying the insulation layer, the power must be cut off to ensure the safety of the operator. Power outage installation will also cause power outages for users, which brings inconvenience to construction deployment. Once the insulation layer of the transmission line is destroyed, the transmission line loses its integrity, posing a safety hazard. In addition, for some cable line nodes where it is not convenient to destroy the insulation layer, if the contact measurement method is used, the voltage value cannot be effectively obtained, and a separate current transformer is required to obtain the current value. Voltage and current cannot be obtained simultaneously by only one sensor. This method has a cumbersome operation process, great construction difficulty and low efficiency. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a multi-user line loss detection detector based on the terminal of the station area.

[0005] The present invention is implemented by constructing a multi-user line loss detection detector based on the terminal of the station area, and the device includes: The instrument body has two sets of three-phase voltage sampling interfaces on the left side of the top surface of the instrument body; An antenna interface is provided in the middle of the top surface of the instrument body, and an RS485 interface and an infrared communication interface are provided in sequence on the right side of the top surface of the instrument body, a liquid crystal display and a pulse light are provided on the left side of the front side of the instrument body, and a display switching button is provided on the right side of the front side of the liquid crystal display; An open transformer interface, an open transformer interface is provided at the bottom of the instrument body; The instrument body is equipped with 7-way three-phase electric energy metering and 3-way voltage sampling circuits, and the open transformer interface is connected to the 7-way three-phase electric energy metering circuits built into the instrument body.

[0006] Preferably, the infrared communication interface is connected to an infrared communication head circuit, and the infrared communication line is composed of a plurality of infrared communication heads connected in series.

[0007] Preferably, there are seven groups of open transformer interfaces arranged in parallel at the bottom of the instrument body.

[0008] Preferably, the seven groups of open current transformer interfaces are connected to a multi-channel open current transformer output connector circuit.

[0009] Preferably, the multi-channel open-type current transformer is composed of three open-type current transformers, and there are seven groups of the multi-channel open-type current transformers in total.

[0010] Preferably, the instrument body has a built-in MCU single-chip computer and a storage module, and the built-in MCU single-chip computer of the instrument body is connected to the storage module, the infrared communication interface and the liquid crystal display circuit.

[0011] The present invention has the following advantages: The present invention provides a multi-user line loss troubleshooting detector based on the terminal of the station area through improvement, which has the following improvements compared with the same type of equipment: The invention discloses a multi-user line loss troubleshooting detector based on the end of the substation, which collects current by setting up multiple open current transformers, is easy to install, and does not require line and wiring changes. The device has 7 built-in three-phase power metering channels in the instrument body to achieve multi-user metering on the same device, is small in size, and does not occupy space. It collects user smart power meter data at regular intervals by setting up multiple infrared communication heads of infrared communication lines and stores them in the device. It reads all stored data through RS485 to calculate line losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the bottom structure of the present invention; Figure 3 It is a schematic diagram of the top and infrared communication head structure of the present invention; Figure 4 It is a schematic diagram of the technical route structure of the present invention; Figure 5 It is a schematic diagram of the structure of the current sampling circuit of the present invention; Figure 6 This is a schematic diagram of the structure of the external 3X7=21-way open transformer interface of the present invention; Figure 7 It is a schematic diagram of the structure of a three-way voltage sampling circuit of the present invention.

[0013] Among them: instrument body-101, three-phase voltage sampling interface-102, antenna interface-103, RS485 interface-104, infrared communication interface-105, LCD display-106, pulse light-107, display switching button-108, open transformer interface-109, multi-channel open current transformer-110, infrared communication line-111. DETAILED DESCRIPTION

[0014] The following is combined with Figures 1 to 7 The principles and features of the present invention are described, and the examples are only used to explain the present invention and are not used to limit the scope of the present invention. In the following paragraphs, the present invention is described in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0015] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0017] See also Figure 1-7 The present invention provides a multi-user line loss detection detector based on the terminal of the station area, comprising: The instrument body 101 has two sets of three-phase voltage sampling interfaces 102 on the left side of the top surface of the instrument body 101. The voltage terminals of the three-phase voltage sampling interfaces 102 collect voltages in the range of 40-300V. The voltage is converted into a smaller voltage signal by using the principle of resistor voltage division and input into a dedicated metering circuit. The characteristics are as follows: An antenna interface 103 is provided in the middle of the top surface of the instrument body 101, and an RS485 interface 104 and an infrared communication interface 105 are provided in sequence on the right part of the top surface of the instrument body 101. A liquid crystal display screen 106 and a pulse light 107 are provided on the left part of the front side of the instrument body 101, and a display switching button 108 is provided on the right part of the front side of the liquid crystal display screen 106, which is convenient for operation and meter viewing; An open transformer interface 109 is provided at the bottom of the instrument body 101; The instrument body 101 has built-in 7-way three-phase power metering and 3-way voltage sampling circuits, and the 7-way three-phase power metering can also be replaced by 18-way single-phase power lines. The open transformer interface 109 is connected to the 7-way three-phase power metering circuit built into the instrument body 101, and the infrared communication interface 105 is connected to the infrared communication head 111 circuit, and the infrared communication line 111 is composed of a plurality of infrared communication heads connected in series. There are a total of seven groups of open transformer interfaces 109 arranged in parallel at the bottom of the instrument body 101, and the seven groups of open transformer interfaces 109 are connected to the multi-way open current transformers. 110 output connector circuit connection, the current collection range is 0-100A, using an open current transformer, a weak current signal is induced, converted into a voltage signal using a conversion circuit, and input into a dedicated metering circuit, the multi-channel open current transformer 110 is composed of three open current transformers, and there are seven groups of multi-channel open current transformers 110, the instrument body 101 has a built-in MCU microcontroller and a storage module, and the built-in MCU microcontroller of the instrument body 101 is connected to the storage module, the infrared communication interface 105 and the liquid crystal display 106 circuit.

[0018] Based on the above implementation, the working principle of a multi-user line loss detection detector based on the terminal of the station area is: Before on-site measurement, the conductor to be tested needs to be placed in the transformer cavity. The multi-user line loss troubleshooting detector at the end of the substation is connected to the on-site voltage line and then enters the dedicated metering circuit in the instrument. The voltage and current are effectively measured in the dedicated metering circuit, and the current voltage, current and corresponding phase angle collected are displayed on the LCD. The specific contents are as follows: a single open current transformer of the multi-channel open current transformer 110 is clamped into the power line, and the secondary side of the transformer outputs a mA-level signal current, which is converted into a voltage signal by a conversion circuit and sent to a dedicated metering circuit in the instrument body 101 for calculation, and finally the analog signal is converted into a digital signal and provided to the MCU, and the parameters such as electric energy, voltage, current, power, and power factor are directly displayed on the LCD screen 106; Supports 21-way open current transformer access to achieve multi-user simultaneous operation; Connect the ABCN lines to the voltage terminals of the three-phase voltage sampling interface 102 respectively, and send them to the dedicated metering circuit through the voltage sampling circuit inside the instrument body 101 to be converted into digital quantities; The instrument body 101 has 7 built-in three-phase dedicated metering circuits, which can simultaneously record the real-time power consumption data of 7 three-phase power lines; The infrared communication head of the external infrared communication line 111 collects and stores the electricity consumption data of the user's smart power meter in the distribution box in a non-contact manner. The data collection interval is 15 minutes. By comparing the 15-minute user meter electricity consumption data and clock, it is monitored whether the user meter measurement is accurate or whether there is any electricity theft, etc., thereby improving line losses.

[0019] The present invention provides an improved multi-user line loss inspection detector based on the end of the substation. By setting a multi-channel open current transformer 110 for current collection, it is easy to install without changing the line and wiring. The device has 7 built-in three-phase power metering in the instrument body 101 to achieve multi-user metering of the same device. It is small in size and does not take up space. By setting multiple infrared communication heads of the infrared communication line 111, the user's smart power meter data is collected regularly and stored in the device. All stored data are read through RS485 to calculate the line loss.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0021] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-user line loss detection detector based on the terminal of the station area, comprising: An instrument body (101), wherein two groups of three-phase voltage sampling interfaces (102) are provided on the left portion of the top surface of the instrument body (101); the characteristics are: An antenna interface (103) is provided in the middle of the top surface of the instrument body (101), and an RS485 interface (104) and an infrared communication interface (105) are provided in sequence on the right side of the top surface of the instrument body (101), a liquid crystal display (106) and a pulse light (107) are provided on the left side of the front side of the instrument body (101), and a display switching button (108) is provided on the right side of the front side of the liquid crystal display (106); An open transformer interface (109), wherein the bottom of the instrument body (101) is provided with an open transformer interface (109); The instrument body (101) has 7-way three-phase electric energy metering and 3-way voltage sampling circuits built in, and the open transformer interface (109) is connected to the 7-way three-phase electric energy metering circuits built in the instrument body (101).

2. According to claim 1, a multi-user line loss detection detector based on the terminal of the station area is characterized by: The infrared communication interface (105) is connected to an infrared communication head (111) circuit, and the infrared communication line (111) is composed of a plurality of infrared communication heads connected in series.

3. According to claim 2, a multi-user line loss detection detector based on the terminal of the station area is characterized by: There are seven groups of open transformer interfaces (109) arranged in parallel at the bottom of the instrument body (101).

4. According to claim 3, a multi-user line loss detection detector based on the terminal of the station area is characterized in that: The seven groups of open-ended current transformer interfaces (109) are connected to the output connector circuits of the multi-channel open-ended current transformers (110).

5. According to claim 4, a multi-user line loss detection detector based on the terminal of the station area is characterized in that: The multi-channel open-type current transformer (110) is composed of three open-type current transformers, and there are seven groups of the multi-channel open-type current transformers (110).

6. According to claim 5, a multi-user line loss detection detector based on the terminal of the station area is characterized in that: The instrument body (101) has an MCU single-chip computer and a storage module built in, and the MCU single-chip computer built in the instrument body (101) is connected to the storage module, the infrared communication interface (105) and the liquid crystal display screen (106) by circuit.

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