CN103760489B - Intelligent detection device for high-voltage circuit breaker - Google Patents

Abstract

An intelligent detection device for a high-voltage circuit breaker, which includes a CPU module connected to a special aviation plug through a sampling conversion module, and the special aviation plug is connected with the secondary plug-in of the circuit breaker, and one end includes two circuits respectively passing through a resistor The measurement module, the circuit connected between the power conversion module and the power output module and one circuit directly connected to the power output module, and the resistance measurement module tests the circuit breaker secondary circuit resistance, and the power conversion module converts the AC 220V voltage of the power output module 220V and 110V two kinds of DC power output are used as the opening and closing DC power supply of the circuit breaker; the CPU module is output to the power supply output module through the power conversion module to the opening and closing power supply of the circuit breaker through the special aviation plug Control and detect and control the current of the energy storage motor through the sampling transformation module to test the energy storage time of the motor, and at the same time calculate the secondary circuit resistance of the circuit breaker tested by the resistance measurement module through the special aviation plug; it has a simple structure , Easy to carry, easy to operate, strong versatility and so on.

Description

A high-voltage circuit breaker intelligent detection device

technical field

The invention relates to an intelligent detection device for a high-voltage circuit breaker, which belongs to the field of electric equipment tools.

Background technique

With the rapid development of the power grid, how to ensure the safety and efficiency of the maintenance test work under the new test environment, test method and test mode has become an urgent issue to be solved. At present, tasks such as installation, commissioning, commissioning, pre-test, overhaul, and defect elimination of high-voltage circuit breakers occupy a large part of the daily equipment maintenance and overhaul work, and in any of the above tasks, it is necessary to The auxiliary contacts and circuits of the device are tested one by one; however, the existing traditional manual one-by-one detection method has the following problems:

1) When installing, debugging, putting into production, pre-testing, overhauling, and eliminating defects, high-voltage circuit breakers need to check auxiliary contacts, electrical circuits, limit positions, opening coils, closing coils, electrical locking coils, and circuit breaker energy storage motors. Electrical components are tested and inspected one by one. The current traditional detection method requires maintenance personnel to carry out circuit breaker schematic wiring diagrams and use tools such as alignment lights or multimeters to test high-voltage circuit breakers one by one, which is labor-intensive and time-consuming;

2) With the improvement of power reliability requirements, it is required to shorten the working time of faulty equipment elimination and maintenance test as much as possible to restore power transmission as soon as possible. Therefore, the overall rapid inspection and centralized maintenance of substations are often used. Due to negligence in the manual inspection process and errors caused by manual long-term work fatigue, the detection accuracy will be reduced; in addition, because manual operation is easy to damage the secondary plug-in pins of the high-voltage circuit breaker, it will cause damage to the equipment and cause related accidents.

3) Different manufacturers and different models of high-voltage circuit breakers have different parameters. Every time for the testing and testing of high-voltage circuit breakers and the elimination of equipment defects, it is necessary to test and check one by one with reference to the electrical schematic diagrams, wiring diagrams and various parameters specified by the manufacturers, and the work efficiency is low.

To sum up, the current high-voltage circuit breaker detection method not only has a large workload, but also consumes a lot of manpower, energy and time, and it is inevitable that there will be incomplete detection, missing detection items, and inaccurate detection results during the operation process, which is prone to errors. , and the test process may cause damage to the secondary plug-in pins of the circuit breaker, which directly affects the stable operation of the power grid and the reliability of power supply.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings, and provide a high-voltage circuit breaker with simple structure, easy portability, convenient operation, strong versatility, fast and accurate detection of circuit breaker auxiliary contacts and circuits, and improved power supply reliability. Intelligent detection device.

The present invention is achieved through the following technical solutions: the intelligent detection device of the high-voltage circuit breaker, which includes a CPU module connected with a special aviation plug through a sampling transformation module, and the special aviation plug is connected with the secondary plug-in of the circuit breaker Together, one end includes two loops respectively connected to the power output module through a resistance measurement module, the power conversion module and a loop directly connected to the power output module, and the resistance measurement module tests the secondary circuit resistance of the circuit breaker. The power conversion module converts the AC 220V voltage of the power output module into two kinds of DC power outputs, 220V and 110V, as the DC power supply for opening and closing of the circuit breaker.

The CPU module adopts the U2STM32F103RBT6 type ARM chip, which controls the power output of the power output module through the power conversion module to the breaker and the power output of the circuit breaker through the special aviation plug and controls the energy storage motor current through the sampling conversion module. Detection and control, while calculating the secondary circuit resistance of the circuit breaker tested by the resistance measurement module through the special aviation plug; the CPU module is connected with an alarm module, a printer module and a liquid crystal keyboard module.

The resistance measurement module is a constant-voltage current-limiting type resistance measurement module for testing the secondary circuit resistance of the circuit breaker; the AC-DC power conversion module is a full-bridge conversion circuit through AC-DC-AC-DC conversion; The printer module is a SEM480 thermal fast printer; the alarm module is a buzzer and a light emitting diode; the LCD keyboard module is a SDW6448-057-NN01W color LCD module.

The system bus of the CPU module is connected with a device interface module composed of a USB interface, having an 8-bit data bus, a read-write chip selection control line and an interrupt output.

The sampling conversion module includes an OP777ARZ operational amplifier that can amplify the collected voltage and current signals, an AD7920BRM chip that can convert analog-to-digital signals, and an ADuM2402BRWZ isolation chip that isolates a pair of signals.

The invention connects the secondary plug-in of the tested high-voltage circuit breaker through a special aviation plug, simulates the actual operating state of the circuit breaker, sets relevant parameters through the LCD keyboard module, and performs output control, and controls 220V AC output and 220/110V DC through the CPU module output to realize the control of the switch opening and closing of the high voltage circuit breaker and the energy storage motor;

The invention can automatically and quickly test the parameters such as the secondary circuit resistance and auxiliary contacts of the high-voltage circuit breaker, and can calculate the energy storage time of the energy storage motor. All the test results can be displayed on the liquid crystal display and can be printed by a printer , when the detection result does not match the set parameter value, a buzzer and light alarm will be given;

The invention can also be connected with an external computer through a USB interface to output test results, and can perform online debugging on the device to realize system update and upgrade.

It has the characteristics of simple structure, easy to carry, convenient operation, and strong versatility. Circuit breaker detection test efficiency.

Description of drawings

Fig. 1 is a block diagram of the overall structure of the present invention.

detailed description

The present invention will be described in detail below in conjunction with accompanying drawing: As shown in Fig. 1, the present invention comprises a CPU module 1 that is connected with special-purpose aviation plug 10 by sampling transformation module 3, described special-purpose aviation plug 10 and circuit breaker secondary plug-in connected together, one end of which includes two loops connected to the power output module 9 through a resistance measurement module 2 and the power conversion module 4 and a loop directly connected to the power output module 9, and is sampled by the resistance measurement module 2 The conversion module 3 tests the secondary circuit resistance of the circuit breaker, and the power conversion module 4 converts the AC 220V voltage of the power output module 9 into two kinds of DC power supplies, 220V and 110V, and outputs them as the opening and closing DC power supply of the circuit breaker.

The CPU module 1 of the present invention adopts the U2STM32F103RBT6 type ARM chip, which controls the power output of the power output module 9 through the power conversion module 4 to the opening and closing of the circuit breaker through the special aviation plug 10 and through the sampling conversion module 3. Detect and control the current of the energy storage motor, and calculate the secondary circuit resistance of the circuit breaker tested by the resistance measurement module 2 and the sampling transformation module 3 through the special aviation plug 10; the CPU module 1 is also connected with an alarm Module 8, printer module 5 and LCD keyboard module 7.

The resistance measurement module 2 of the present invention is a constant-voltage current-limiting type resistance measurement module for testing the secondary circuit resistance of a circuit breaker; the power conversion module 4 is a full-bridge conversion through AC-DC-AC-DC conversion circuit; the printer module 5 is a SEM480 thermal fast printer; the alarm module 8 is a buzzer and a light-emitting diode; the LCD keyboard module 6 is a SDW6448-057-NN01W color liquid crystal Display modules.

The system bus of the CPU module 1 is connected with a device interface module 7 composed of a USB interface, having an 8-bit data bus, a read-write chip select control line and an interrupt output.

The sampling transformation module 3 includes an OP777ARZ operational amplifier capable of amplifying the collected voltage and current signals, an AD7920BRM chip capable of converting analog-to-digital signals, and an ADuM2402BRWZ isolation chip capable of isolating a pair of signals.

Embodiment: As shown in Fig. 1, the present invention mainly comprises: CPU module 1, resistance measurement module 2, sampling conversion module 3, power conversion module 4, printer module 5, liquid crystal keyboard module 6, equipment interface module 7, alarm module 8, 220V AC power output module 9, special aviation plug 10.

CPU module 1 is the control center of the whole device. It adopts U2STM32F103RBT6 ARM chip. It controls the output of AC and DC power supply to realize the opening and closing of the circuit breaker and the detection of the energy storage current of the energy storage motor, and simultaneously tests and calculates the secondary circuit resistance. At the same time, the alarm module is controlled by the CPU, and when the secondary resistance of the test control circuit is abnormal, the buzzer and warning light are driven to remind the test personnel to pay attention. In addition, the CPU drives the LCD module, responds to the keyboard input and displays the setting items and test results, and the specific test parameters are placed in the EEPROM.

Resistance measurement module 2 is a constant-voltage current-limiting resistance measurement module, which uses an OP07CP operational amplifier to test the circuit breaker secondary circuit resistance. When the resistance is large, keep the constant voltage, and calculate the secondary circuit resistance of the circuit breaker in the closed state by measuring the sampling current; when the resistance is small, pass a current limiting resistor to keep the current at a constant value of 0.5A, and measure Voltage, calculate the secondary circuit resistance of the circuit breaker open state.

Sampling conversion module 3 uses OP777ARZ operational amplifier to amplify the collected voltage and current signals and converts analog-to-digital signals through AD7920BRM, and finally isolates signals through ADuM2402BRWZ isolation chip.

The AC-DC power conversion module 4 is a full-bridge conversion circuit, through AC-DC-AC-DC conversion, the ripple of the power transmission power is small, the voltage is stable, and the power is relatively large. The module converts the AC 220V voltage and outputs two kinds of DC power supplies, 220V and 110V, to meet the requirements of opening and closing DC power supplies for different types of high-voltage circuit breakers.

The printer module 5 is a SEM480 thermal fast printer. It is connected to the CPU through 26 pins, and the data interaction is connected through an 8-bit data line. The transmission speed is fast. The printing driver circuit is provided by the printer, and it can be used immediately after installation.

The liquid crystal keyboard module 6 is a SDW6448-057-NN01W type color liquid crystal display module. The drive circuit is provided by the module without further design; the design of the control circuit and the interface circuit with the CPU is completed through the CPU enabling, reading and writing, realizing parameter setting, output control, and display of test results.

The device interface module 7 is a USB interface, adopts CH375 chip, has 8 data buses, read, write, chip select control lines and interrupt output, and is connected to the system bus of the CPU to realize data transmission and debugging functions.

The alarm module 8 is a buzzer and a light-emitting diode flashing prompt alarm. When there is an abnormality, the CPU outputs a control signal, and amplifies the current through the ULN2003AD module to drive the buzzer and the warning light to realize the alarm.

The 220V AC power output module 9 is a pin-type 220V AC power output port. The pin-type 220V AC power supply is connected to the secondary plug-in of the circuit breaker through the aviation socket to provide power for the energy storage motor of the circuit breaker.

The device is connected to the secondary plug-in of the circuit breaker through a special aviation plug to simulate the actual operating state of the circuit breaker, and has 220V AC and 220V, 110V DC output to realize the opening and closing operation of the circuit breaker and the energy storage motor during the test. control. The device can automatically and quickly test the secondary circuit, auxiliary contacts and electrical components, and can use the AC and DC power output from the device to calculate the energy storage time of the energy storage motor through the CPU. All test results can be displayed on the LCD On the display, when the detection result does not match the set parameters, a buzzer and light alarm will be given. The test parameters can also be output through the USB interface module and the device can be debugged.

The present invention has following several characteristics:

1) Simulate the actual operating state of the aviation plug of the circuit breaker; the invention connects the special aviation plug and the secondary plug-in of the tested product, completely simulates the actual operating state of the circuit breaker, and avoids the use of a multimeter on the basis of improving the accuracy of the detection data Occurrence of missed detection, damaged pins, etc. during manual inspection of equipment;

2) The work efficiency is greatly improved; the present invention automatically and quickly tests the secondary circuit, auxiliary contacts and electrical components through the program set by the CPU and the LCD keyboard module, and compares the test results with the set parameters to compare Compared with traditional manual inspection, the work efficiency is greatly improved;

3) The system can be upgraded and updated; the invention can meet the detection needs of different manufacturers and different types of equipment by changing different types of aviation plugs and setting internal programs; for the newly added new circuit breakers in the system, it can also be set Parameters of new high-voltage circuit breakers to enable detection of new circuit breakers with scalability.

Claims (4)

1. a kind of intelligent detection device of primary cut-out, it is connected with general aviation plug including one by sampling transformation module CPU modules, it is characterised in that described general aviation plug links together with breaker secondary inserting piece, and its one end has two Road is connected by a resistance measuring module and power conversion module with power supply output module respectively, the general aviation plug it is same One end also has and is directly connected with power supply output module all the way, and tests secondary loop of breaker resistance by resistance measuring module, by Power conversion module makees the alternating current 220V voltage transformation of power supply output module into two kinds of dc source outputs of 220V and 110V For breaker point, combined floodgate dc source；

Described CPU modules use U2STM32F103RBT6 type ARM chips, and it is by the general aviation plug to power supply Output module is exported to the power supply for dividing, closing a floodgate of breaker by power conversion module and is controlled and by sampling transformation mould Block carries out detection control to energy storage motor electric current, while by breaking that the general aviation plug is tested resistance measuring module Road device secondary circuit resistance is calculated；Described CPU modules are connected with alarm module, printer module and liquid crystal keyboard Module.

2. the intelligent detection device of primary cut-out according to claim 1, it is characterised in that described resistance measurement mould Block is a constant voltage and current limiting type resistance measuring module for test secondary loop of breaker resistance；Described power conversion module is one The full-bridge circuit converted by AC-DC-AC-DC；Described printer module is a SEM480 temperature-sensitive rapid printers； Described liquid crystal Keysheet module is a SDW6448-057-NN01W type colorized lcd display models；Described alarm module is one Buzzing generator and a light emitting diode.

3. the intelligent detection device of primary cut-out according to claim 1, it is characterised in that the CPU modules are System bus on be mounted with one be made up of USB interfaces, with 8 bit data bus and read-write piece select control line and interrupt output Device interface module.

4. the intelligent detection device of primary cut-out according to claim 1, it is characterised in that the sampling transformation module Including the OP777ARZ operational amplifiers that the voltage that will can collect, current signal are amplified, one can be simulated numeral The AD7920BRM chips of signal conversion, and the ADuM2402BRWZ isolating chips that a pair of signals are isolated.