CN110940499A - High-voltage circuit breaker mechanical property detector - Google Patents

Abstract

The invention discloses a high-voltage circuit breaker mechanical performance detector, which relates to the technical field of high-voltage equipment and comprises a processor, a current signal sampling circuit, a displacement sensor sampling circuit, a memory, a liquid crystal screen, a printer, a USB interface and an RS485 interface, wherein the processor is respectively connected with the current signal sampling circuit, the displacement sensor sampling circuit, the memory, the liquid crystal screen and the printer, the processor is provided with the USB interface and the RS485 interface, the displacement sensor interface on the current signal sampling circuit is connected with a linear sensor directly acting on a moving contact and a static contact, the displacement sensor sampling circuit is provided with the displacement sensor interface, the displacement sensor interface is connected with a sensor socket on a rotary sensor through a connecting wire, and the rotary sensor is arranged on a leakage rotating shaft outside a switch; the breaker maintenance work is more economical and effective, the time and the maintenance cost of a maintenance management department can be saved, and the system has stronger self-improvement capacity.

Description

High-voltage circuit breaker mechanical property detector

Technical Field

The invention relates to the technical field of high-voltage equipment, in particular to a mechanical performance detector of a high-voltage circuit breaker.

Background

The circuit breaker is the most important switching device in the power system, and is not only used for switching on and off normal line work, but also used for automatically cutting off short-circuit current when the power system has short-circuit fault, so the quality of the operation condition of the circuit breaker directly affects the safe and stable operation of the power system, and the mechanical characteristic parameter is one of important parameters for judging the performance of the circuit breaker; no matter how the equipment running state and the damaged condition are, the equipment needs to be overhauled regularly, which influences the reliability of the power supply of the equipment to a great extent, the mechanical performance of the existing high-voltage circuit breaker is detected manually by maintenance personnel, the time is wasted, and the cost is higher.

Disclosure of Invention

The invention aims to solve the technical problem of providing the high-voltage circuit breaker mechanical performance detector which is economical, efficient, accurate in measured data, strong in anti-interference capability and capable of saving maintenance time and cost.

The technical scheme of the invention is as follows: the high-voltage circuit breaker mechanical performance detector comprises a processor, a current signal sampling circuit, a displacement sensor sampling circuit, a memory, a liquid crystal display, a printer, a USB interface and an RS485 interface; the processor is respectively connected with the current signal sampling circuit, the displacement sensor sampling circuit, the memory, the liquid crystal screen and the printer, and a USB interface and an RS485 interface are arranged on the processor; the data acquisition device of the current signal sampling circuit acquires induced current signals through the high-speed AD conversion module, performs frequency domain expansion analysis on the acquired induced current signals after digital filtering, analyzes and judges information to determine switching-on and switching-off time nodes, and a displacement sensor interface on the current signal sampling circuit is connected with a linear sensor directly acting on a moving contact and a static contact; the displacement sensor acquisition circuit is provided with a displacement sensor interface, the displacement sensor interface is connected with a sensor socket on a rotary sensor through a connecting wire, the rotary sensor is installed on a switch leakage rotating shaft, the left side of the rotary sensor is connected with a coupler, a fixed buckle sheet is arranged on the coupler, the left side of the fixed buckle sheet is a switch crank rotating shaft, and the fixed buckle sheet is fixedly connected with a positioning hole on the switch crank rotating shaft.

Preferably, the lower part of the rotation sensor is provided with a fixed seat connected with the universal bracket.

The invention has the beneficial effects that: the device is mainly used for testing the mechanical performance of the circuit breaker regularly, comprises opening and closing coil current, moving contact stroke characteristics and the like, provides basis for making more economic and effective circuit breaker maintenance plans, can save the time and maintenance cost of maintenance management departments, and has stronger adaptability and good expansion capability due to the characteristic value and the external hanging mode of a diagnosis algorithm, so that the system has stronger self-improvement capability.

Drawings

Fig. 1 is a schematic structural diagram of a mechanical performance detector of a high-voltage circuit breaker.

Fig. 2 is a current signal sampling circuit diagram of a high-voltage circuit breaker mechanical performance detector.

Fig. 3 is a flow chart of the opening and closing time testing of the high-voltage circuit breaker mechanical performance detector.

Fig. 4 is an internal collection schematic diagram of various high-voltage circuit breaker mechanical performance detectors.

Fig. 5 is a schematic diagram of a sampling mode of various high-voltage circuit breaker mechanical performance detectors.

Fig. 6 is a schematic view of a rotary leakage mounting of various high-voltage circuit breaker mechanical performance detectors.

Reference numerals: 1-a processor; 2-a current signal sampling circuit; 3-a displacement sensor sampling circuit; 4-a memory; 5-a liquid crystal screen; 6-a printer; 7-USB interface; 8-RS485 interface; 9-displacement sensor interface; 10-a data acquisition device; 11-a rotation sensor; 111-switch crank arm rotation axis; 112-fixing the cramp; 113-a coupling; 114-a sensor socket; 115-fixed seat.

Detailed Description

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

according to fig. 1 and 6, a mechanical performance detector for a high-voltage circuit breaker comprises a processor 1, a currentsignal sampling circuit 2, a displacement sensor sampling circuit 3, amemory 4, aliquid crystal display 5, aprinter 6, a USB interface 7 and an RS485 interface 8; the processor 1 is respectively connected with the currentsignal sampling circuit 2, the displacement sensor sampling circuit 3, thememory 4, theliquid crystal screen 5 and theprinter 6, thememory 4 is used for storing field test data and is convenient to archive and store, the processor 1 is provided with a USB interface 7 and an RS485 interface 8, the USB interface 7 is used for exporting the data to the USB interface memory, and the RS485 interface 8 is used for being operated online with a PC; thedata acquisition device 10 of the currentsignal sampling circuit 2 acquires induced current signals through a high-speed AD conversion module, performs frequency domain expansion analysis on the acquired induced current signals after digital filtering, analyzes and judges information to determine switching-on and switching-off time nodes, and adisplacement sensor interface 9 on the currentsignal sampling circuit 2 is connected with a linear sensor directly acting on a moving contact and a static contact; the displacement sensor acquisition circuit 3 is provided with adisplacement sensor interface 9, thedisplacement sensor interface 9 is connected with a sensor socket 114 on therotary sensor 11 through a connecting wire, therotary sensor 11 is installed on a switch leakage rotating shaft, a shaft of therotary sensor 11 is concentric with the switch rotating shaft, the left side of therotary sensor 11 is connected with acoupler 113, afixed buckle sheet 112 is arranged on thecoupler 113, the left side of the fixedbuckle sheet 112 is provided with a switchcrank rotating shaft 111, thefixed buckle sheet 112 is fixedly connected with a positioning hole on the switchcrank rotating shaft 111, the lower part of therotary sensor 11 is provided with a fixedseat 115 connected with a universal support, after the speed sampling calculation is completed, the digital signal quantity of therotary sensor 11 is sampled and then processed by a processor 1 to obtain a V-S curve, and corresponding information is displayed on the liquid.

The working principle of the invention is as follows: the test content is divided into conventional test and performance test; the conventional test comprises the on-off time, the bounce time and the synchronous time test of the breaker switch, and the speed conventional parameters of the switch, such as just on-off speed, maximum speed, average speed, opening distance, over travel and the like, are simultaneously calculated at a high speed; the performance test comprises a reclosing test and a low voltage test, wherein the reclosing test mainly tests time data and data waveforms of opening-closing, closing-opening and opening-closing-opening of the reclosing of the breaker switch; the low voltage test is to measure the voltage action values of the coil combining and separating and draw the action curve chart of the coil.

As shown in fig. 2, the closing and opening time test means that when the circuit breaker is operated in a state, the electricity on the closing (opening) coil is used as a timing starting point, the time to just closing (opening) the moving contact and the static contact is measured, a high-speed digital signal circuit is adopted for sampling detection and judgment in the aspect of time measurement, and after an external test circuit is connected as required, the opening (closing) operation is controlled in an internal triggering mode; the measurement principle adopts a double-end grounding network to realize signal detection, wherein a data acquisition device can generate alternating current signals with fz frequency and Vz amplitude, when a circuit breaker is closed, a current sampling part in thedata acquisition device 10 acquires semaphore with the same frequency, in the process, the time th1 of a closing signal is sent out to start recording and timing until the current acquisition device detects the signal time th2, the middle time of the two times is the closing action time, and the opening process is the opening time from the time of sending an opening signal to the time of not detecting a signal when the last contact is opened.

As shown in fig. 3, thedata acquisition device 10 acquires the induced current signal through the high-speed AD conversion module, performs digital filtering, performs FFT to perform frequency domain expansion analysis, and analyzes and determines the information to determine the switching-on/off time node.

As shown in fig. 4, the external trigger mode provides a more opening and closing brake coil working current through the inside, a high-precision and high-sensitivity acquisition CT sensor is integrated in the outside, a CT signal is processed and sent to the processor 1, the processor 1 performs algorithm quantitative analysis processing on the data, draws an output waveform point code, and uploads the output waveform point code to the server or the PC background terminal.

As shown in fig. 5, the circuit breaker is switched on and off by controlling the switching-on and switching-off coil of the circuit breaker, the interphase synchronism is calculated by recording the action time of corresponding contacts, the sampling resolution is 0.1ms, and the requirement of synchronous sampling can be completely met; the principle of synchronism between the same phases is similar.

As shown in fig. 1, in the high-voltage circuit breaker, a moving contact and a fixed contact are contacted to generate a bouncing phenomenon in a closing process, a bouncing time test is tested in a closing and opening process, equipment test field data is used for displaying a waveform through an upper computer, and the bouncing time and the bouncing times of each phase can be clearly found after amplification.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (2)

Translated fromChinese

1.一种高压断路器机械性能检测仪，包括处理器、电流信号采样电路、位移传感器采样电路、存储器、液晶屏、打印机、USB接口、RS485接口，其特征在于：所述的所述处理器分别与电流信号采样电路、位移传感器采样电路、存储器、液晶屏、打印机连接，处理器上有USB接口和RS485接口；所述的电流信号采样电路的数据采集装置通过高速AD转换模块采集感应电流信号，采集后经过数字滤波后进行FFT进行频域展开分析对信息进行分析判断确定合分闸时间节点，电流信号采样电路上的位移传感器接口与直接作用动静触头上的直线传感器连接；所述的位移传感器采集电路上有位移传感器接口，位移传感器接口通过连接线与旋转传感器上的传感器插口连接，旋转传感器安装在开关外漏旋转轴上，旋转传感器左侧连接有联轴器，联轴器上有固定扣片，固定扣片左侧是开关拐臂旋转轴，固定扣片与开关拐臂旋转轴上的定位孔固定连接。1. a high-voltage circuit breaker mechanical performance detector, comprising a processor, a current signal sampling circuit, a displacement sensor sampling circuit, a memory, a liquid crystal screen, a printer, a USB interface, an RS485 interface, and it is characterized in that: the described processor It is respectively connected with the current signal sampling circuit, the displacement sensor sampling circuit, the memory, the liquid crystal screen and the printer, and the processor has a USB interface and an RS485 interface; the data acquisition device of the current signal sampling circuit collects the induced current signal through a high-speed AD conversion module , after digital filtering, FFT is performed to perform frequency domain expansion analysis to analyze and judge the information to determine the closing and opening time nodes. The displacement sensor interface on the current signal sampling circuit is connected with the linear sensor on the direct-acting dynamic and static contacts; the described There is a displacement sensor interface on the displacement sensor acquisition circuit. The displacement sensor interface is connected with the sensor socket on the rotation sensor through a connecting wire. The rotation sensor is installed on the external leakage rotation shaft of the switch. The left side of the rotation sensor is connected with a coupling. There is a fixed buckle, the left side of the fixed buckle is the rotating shaft of the switch arm, and the fixed buckle is fixedly connected with the positioning hole on the rotating shaft of the switch arm.2.如权利要求1所述的高压断路器机械性能检测仪，其特征在于：所述的旋转传感器下部有与万能支架连接的固定座。2 . The high-voltage circuit breaker mechanical performance detector according to claim 1 , wherein the lower part of the rotation sensor has a fixed seat connected with the universal bracket. 3 .

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