Current loop alignment meter using current transformer

Abstract

The utility model discloses a current loop alignment meter using a current transformer, which relates to the field of secondary loop circuit alignment and comprises a shell, a controller, a circuit control module, a display module, a data transmission module, an alarm module and a power supply module. The controller receives the current sent by the circuit control module, obtains a wiring current characteristic value and displays a wiring result, and the alarm module sends an alarm signal when wiring is wrong; the circuit control module emits safe high-frequency current and monitors current frequency change. The display module displays a current wiring result and a working state; the data transmission module outputs the data; the power supply module is used for supplying power to the alignment meter; through the mutual cooperation of the modules, the secondary circuit alignment operation of the transformer substation current transformer is realized, the secondary circuit alignment efficiency is improved, the personal safety risk and the equipment manual operation risk are reduced, and the purposes of assisting in quality improvement and efficiency improvement of field debugging are achieved.

Description

Technical Field

[0001] The utility model relates to a current transformer wiring technology, in particular to a current loop wiring meter utilizing a current transformer, which is used for current transformer wiring operation in a transformer substation. Background Art

[0002] In the prior art, the current transformer alignment test of the substation usually uses the method of connecting the positive pole of the battery to the same-name terminal of the secondary winding of the GIS current transformer, and the negative pole to the other end of the winding column, and then connecting the DC meter to the current terminal block, and the positive pole of the red pen of the DC meter is connected to the secondary same-name terminal. When the circuit is connected, the primary current flows into the same-name terminal, and the secondary current flows out of the same-name terminal. The pointer swings to the right. After stabilization, when the circuit is disconnected, the pointer swings to the left, and the secondary same-name terminal is marked correctly. If the pointer swings in the opposite direction, the secondary same-name terminal should be at the other end. However, when conducting tests on GIS equipment, it is often necessary to disassemble the secondary line on the current transformer body side to carry out the alignment work due to limited space. There is no place to place the battery. After the alignment is completed, the connection is restored. If the battery falls into the gap between the GIS equipment, it is extremely difficult to pick up. The test is very inconvenient, affecting the efficiency of the debugging work. In addition, the pen tip of the test line can easily accidentally touch the battery and cause a short circuit, posing a safety risk.

[0003] At the same time, the traditional wiring method has the following problems: workers working at height to disconnect wires will result in long idle time and heavy workload. During the disconnection process, there are risks such as twisting off the terminal, screw stripping, loose wiring, and restoration errors. The terminals used in current transformers from different manufacturers are inconsistent, which increases the time required to prepare tools. Utility Model Content

[0004] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and disclose a current loop alignment table using a current transformer, which realizes the secondary loop alignment operation of the current transformer in the substation, improves the efficiency of the secondary current loop alignment, reduces the personal safety risks and the risks of human operation of the equipment, and helps to improve the quality and efficiency of on-site debugging.

[0005] The technical solution adopted by the utility model to solve the technical problem is a current loop alignment meter using a current transformer, comprising: a housing, a controller, a circuit control module, a display module, a data transmission module, an alarm module and a power supply module;

[0006] The controller receives the current sent by the circuit control module, processes the current to obtain a wiring current characteristic value, and displays the wiring result during wiring. At the same time, the wiring result is sent to the display module. If a wiring error occurs, an alarm signal is sent to the alarm module;

[0007] The circuit control module emits a safe high-frequency current and simultaneously monitors the frequency changes of the current in the circuit;

[0008] The display module displays the current wiring result and the working status of the wiring table;

[0009] The data transmission module outputs the current amount of the current connection result as data;

[0010] The alarm module sends out an alarm signal when a wiring error occurs;

[0011] The power supply module is used to provide power to the wiring table.

[0012] Further:

[0013] The circuit control module includes a high-frequency current unit and a current acquisition unit;

[0014] The high-frequency current unit is used to control the output of the high-frequency pulse signal;

[0015] The current acquisition unit is used to acquire the received current and output it to the controller. The controller determines the wiring logic according to the acquired current characteristics.

[0016] Further:

[0017] The display module includes a display screen, a charging port and a human-computer interaction unit;

[0018] The display screen is used to display the current working status in real time, including information such as safety protection, battery power, and test results;

[0019] The charging port is connected to the power module through wiring. The charging port uses a 5V type-c interface and is located in the lower left corner of the display screen;

[0020] The human-computer interaction unit includes a main switch, a test key and a connection port; the staff controls the wiring table through the keys in the human-computer interaction unit;

[0021] The main switch is located at the lower left corner of the display screen and to the right of the charging port, and the test button is to the right of the main switch;

[0022] The connection port is located on the right side of the display screen. The number of the connection ports is 8 and each connection port is a banana jack.

[0023] Further:

[0024] The data transmission module unit includes a table output, and the table output integrates the data into Excel and outputs it to a computer or a USB flash drive.

[0025] Further:

[0026] The power module is powered by a lithium battery unit, the voltage of which is 12V. The voltage is used for subsequent signal detection and amplification, and also provides stable power supply for the system.

[0027] Going further:

[0028] The alarm module includes an acousto-optic unit;

[0029] The sound and light unit is used to issue an alarm when the current characteristic values ​​received by the controller do not match.

[0030] Further:

[0031] The shell is made of insulating material with high strength and hardness.

[0032] Compared with the prior art, the utility model has the following advantages:

[0033] This solution solves the problem of disassembly under traditional wiring. It emits a safe high-frequency current through the circuit control module and utilizes the electrical characteristic of the inductor coil that "blocks high frequency". At the same time, it can monitor the current frequency changes in the device and send an alarm when a wiring error occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the module structure of the utility model;

[0035] Figure 2 This is a schematic diagram of the display screen of the present utility model;

[0036] Figure 3 This is a schematic diagram of the high-frequency current module of the utility model:

[0037] Figure 4 This is a circuit diagram of the current collection of the utility model. DETAILED DESCRIPTION

[0038] The following describes the specific implementation of the utility model with reference to the accompanying drawings and embodiments:

[0039] like Figures 1 to 4As shown, it shows a specific implementation of the present invention; it includes: a shell, a controller, a circuit control module, a display module, a data transmission module, an alarm module and a power supply module; the controller receives the current sent by the circuit control module, obtains the wiring current characteristic value by processing the current, and displays the wiring result during wiring. At the same time, the wiring result is sent to the display module. If a wiring error occurs, an alarm signal is sent to the alarm module; the circuit control module is used to emit a safe high-frequency current and monitor the current frequency change in the circuit; the display module is used to display the current wiring result and the working status of the wiring table; the data transmission module is used to output the current amount of the current result as data; the alarm module is used to send an alarm signal when the wiring is wrong; the power supply module is used to provide power to the wiring table; the circuit control module includes a high-frequency current unit and a current acquisition unit; the high-frequency current unit is used to control the output of a high-frequency pulse signal; the current acquisition unit is used to acquire the received current and output it to the controller, and the controller determines the wiring logic based on the acquired current characteristics.

[0040] Specifically, the display module includes a display screen, a charging port and a human-computer interaction unit;

[0041] The display screen is used to display the current working status in real time, including information such as safety protection, battery power, and test results;

[0042] Specifically, the charging port is connected to the power module through wiring, the charging port adopts a 5V type-c interface, and the charging port is located in the lower left corner of the display screen;

[0043] Specifically, the human-computer interaction unit includes a main switch, a test key and a connection port; the staff controls the wiring table through the keys in the human-computer interaction unit;

[0044] Specifically, the main switch is located in the lower left corner of the display screen and to the right of the charging port, and the test button is to the right of the main switch;

[0045] Specifically, the connection port is located on the right side of the display screen, and the number of the connection ports is 8;

[0046] The data transmission module unit includes a table output, and the table output integrates the data into Excel and outputs it to a computer or a USB flash drive.

[0047] Specifically, the power module is powered by a lithium battery unit, the voltage of which is 12V. The voltage is used for subsequent signal detection and amplification, and also provides stable power supply for the system.

[0048] The alarm module includes an acousto-optic unit;

[0049] Specifically, the sound and light unit is used to issue an alarm when the current characteristic value received by the controller does not match.

[0050] The shell is made of insulating material with high strength and hardness.

[0051] In the specific implementation, Figure 2 As shown, during work, the staff connects the circuit of the current transformer to the wiring ports 1-8. The wiring ports are designed in the form of banana sockets, which is convenient for the staff to perform plugging and unplugging and wiring operations.

[0052] After connecting the lines, the staff presses the main switch, and the display screen lights up. Then, they press the test button, and the display screen displays "Testing..." At this time, the circuit control module emits a high-frequency current, and the controller receives the high-frequency current to identify and calculate the characteristic value of the current pulse. After a few seconds, the display screen will correctly display the port group connection method; if there is an error in the wiring, the alarm module will emit an audible and visual prompt.

[0053] like Figure 3 , which shows a circuit diagram of the high-frequency current module of the utility model, wherein the high-frequency current unit mainly includes an input end, a diode D1, a resistor R1, a current limiting resistor F1, a filter capacitor C1, a full-bridge chip Q1, a sampling resistor and an output end.

[0054] The positive electrode of the input terminal is connected to the positive electrode of the diode D1, the negative electrode of the diode D1 is connected to one end of the current-limiting resistor F1, the negative electrode of the input terminal is connected to one end of the resistor R1, the other end of the resistor R1 is connected to one end of the filter capacitor C1, and the other end of the filter capacitor C1 is connected to the other end of the current-limiting resistor F1. The input terminal, the diode D1, the resistor R1, the current-limiting resistor F1 and the filter capacitor C1 together form an input high-current circuit. The full-bridge chip is connected to the input high-current circuit, and finally outputs a high-frequency current signal to the current acquisition module;

[0055] Among them, the input end is a 12V lithium battery tube, the diode D1 is used to prevent the load coil current from being coupled and inductively connected, resulting in current backflow; the current limiting resistor F1 is used to limit the current size when the current in the circuit is too large or short-circuited, to avoid burning the equipment and load; the filter capacitor C1 is used to make the output high-frequency current effect more stable; the full-bridge driver chip Q1 is used to output high-frequency current signals in forward and reverse directions.

[0056] The current acquisition circuit is used to receive the high-frequency current; Figure 4As shown, the current collection circuit is shown in the figure: one end of the resistor R1 is connected to one end of the resistor R3, the other end of the resistor R1 is connected to one end of the resistor R6, the negative electrode of the input end of the amplifier U1 is connected to one end of the resistor R2 and the other end of the resistor R3, the positive electrode of the input end of the amplifier U1 is connected to the other end of the resistor R6 and the resistor R4, the other end of the resistor R4 is grounded, the output end of the amplifier U1 is connected to one end of the resistor R5 and one end of the resistor R7, one end of the resistor R5 is connected to one end of the resistor R7, the negative electrode of the input end of the amplifier U2 is connected to the other end of the resistor R7 and the positive electrode of the input end of the amplifier U1 One end of the resistor R8 is connected, the positive input terminal of the amplifier U2 is connected to one end of the resistor R6, the other end of the resistor R6 is grounded, and the output terminal of the amplifier U2 is connected to the other end of the resistor R8, ultimately sending the current to the controller. The resistor R1 is used for current sampling. The current signal passes through the resistor R1 and is sent to the amplifiers U1 and U2 in sequence. The resistors R3, R4, R6, R5, and R7 are all used to protect the circuit from excessive current. The resistor Ref provides the initial voltage for the current acquisition circuit and simultaneously raises the current signal on the resistor R1. The current signal is amplified in two stages by the amplifiers U1 and U2, and the amplified current signal is ultimately sent to the controller.

[0057] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose that can be achieved by the present utility model.

[0058] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in this field without departing from the purpose of the present invention.

[0059] Many other changes and modifications can be made without departing from the concept and scope of the present invention. It should be understood that the present invention is not limited to specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A current loop alignment meter using a current transformer, Its characteristics are: It comprises a housing, a controller, a circuit control module, a display module, a data transmission module, an alarm module and a power module; the data transmission module is electrically connected to the controller, the power module is electrically connected to the controller, the display module is electrically connected to the controller, the alarm module is electrically connected to the controller, and the circuit control module is electrically connected to the controller; The controller receives the current sent by the circuit control module, obtains the wiring current characteristic value by processing the current, and displays the wiring result during wiring. At the same time, the wiring result is sent to the display module. If a wiring error occurs, an alarm signal is sent to the alarm module; The circuit control module emits a safe high-frequency current and simultaneously monitors the frequency changes of the current in the circuit; The display module displays the current wiring result and the working status of the wiring table; The data transmission module outputs the current amount of the current connection result as data; The alarm module sends out an alarm signal when a wiring error occurs; The power supply module is used to provide power to the wiring table.

2. A current loop alignment meter using a current transformer as claimed in claim 1, Its characteristics are: The circuit control module includes a high-frequency current unit and a current acquisition unit; The high-frequency current unit outputs a high-frequency pulse signal; The current acquisition unit acquires and receives the current and outputs it to the controller. The controller determines the wiring logic according to the acquired current characteristics.

3. A current loop alignment meter using a current transformer as claimed in claim 1, Its characteristics are: The display module includes a display screen, a charging port and a human-computer interaction unit; The display screen displays the current working status in real time, including safety protection, battery power, test results and other information; The charging port is connected to the power module through wiring. The charging port uses a 5V type-c interface and is located in the lower left corner of the display screen; The human-computer interaction unit includes a main switch, a test key and a connection port; the staff controls the wiring table through the keys in the human-computer interaction unit; The main switch is located at the lower left corner of the display screen and to the right of the charging port, and the test button is to the right of the main switch; The connection port is located on the right side of the display screen. The number of the connection ports is 8 and each connection port is a banana jack.

4. A current loop alignment meter using a current transformer as claimed in claim 1, Its characteristics are: The data transmission module unit includes a table output, and the table output integrates the data into Excel and outputs it to a computer or a USB flash drive.

5. A current loop alignment meter using a current transformer as claimed in claim 1, Its characteristics are: The power module is powered by a lithium battery unit, the voltage of which is 12V. The voltage is used for subsequent signal detection and amplification, and also provides stable power supply for the system.

6. A current loop alignment meter using a current transformer as claimed in claim 3, Its characteristics are: The alarm module includes an acousto-optic unit; The sound and light unit is used to issue an alarm when the current characteristic values ​​received by the controller do not match.

7. A current loop alignment meter using a current transformer as claimed in claim 1, Its characteristics are: The shell is made of insulating material with high strength and hardness.

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