CN102288909A - Portable breaker state monitor - Google Patents
Portable breaker state monitor Download PDFInfo
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- CN102288909A CN102288909A CN2011102075884A CN201110207588A CN102288909A CN 102288909 A CN102288909 A CN 102288909A CN 2011102075884 A CN2011102075884 A CN 2011102075884A CN 201110207588 A CN201110207588 A CN 201110207588A CN 102288909 A CN102288909 A CN 102288909A
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Abstract
The invention relates to a portable breaker state monitor. The portable monitor consists of a device box, a clamp sensor, a power supply module and a hardware circuit module, wherein the power supply module and the internal hardware circuit module are arranged in the device box; the clamp sensor is arranged outside the device box; the power supply module, the clamp sensor, the hardware circuit module, and the power supply module are connected with one another through a signal interface formed on a front panel of the device box; and the signal direction is as follows: the clamp sensor directly clamps a measurement position of a breaker to be tested and sends an acquired signal to the internal hardware circuit through the signal interface on the front panel of the device box, the signal is subjected to electromagnetic interference suppression and amplified by an amplification circuit to a voltage range which can be accepted by a digital signal processor, an analog-to-digital (AD) conversion module arranged in the digital signal processor saves the acquired signal in a high-capacity flash memory, and the acquired signal is displayed by a liquid crystal display installed on the upper panel of the device box in real time or displayed on an upper computer through a communication interface of the front panel of the device box. The portable breaker state monitor is flexible and portable and has wide application prospect in the field of automation of electrical power systems.
Description
Technical field
The present invention relates to a kind of portable beaker state monitor, belong to power system automatic field, this device can be used for monitoring the running status of multiple model isolating switch, thereby determines whether isolating switch needs maintenance, overhaul which parts and content, with the development trend of prediction concealment.
Background technology
Isolating switch is transformer station's machinery and the most frequent equipment of electrical action.But in the frequent operational process isolating switch or its parts because of be heated, the strain of electricity and the mechanical strain or the influence of environment, performance is deterioration gradually, finally cause fault, cause the damage of other power equipment (capacitor, transformer etc.) or the power failure of electric system, all considerably beyond the value of isolating switch itself.Therefore its functional reliability has crucial meaning to the safe operation of electric system.
To the maintenance of isolating switch, traditional pattern is the cycled recondition based on the time.The actual state of this no matter isolating switch, time between overhauls(TBO) in accordance with regulations and overhauling project carry out large and small mode of repairing and have the following disadvantages without exception: (1) off-line testing need have a power failure and carry out, and the back circuit-breaker status and in servicely be not inconsistent of having a power failure influences the accuracy of judgement degree; (2) owing to periodically make regular check on, be not to monitor at any time continuously, isolating switch still may break down during intertrial interval, causes maintenance untimely; (3) exist maintenance superfluous, operation is frequent, certainly will increase the probability of isolating switch misoperation.
Because the prophylactic repair technology exists above not enough, each transformer station of electric system wishes to have a kind of system of monitoring breaker running status in real time, to improve reliability of operation, guarantee safe operation of power system, the status monitoring research of therefore carrying out isolating switch is very important.
The existing circuit breaker status monitoring mainly is to adopt on-line monitoring, promptly under the normal operation of circuit breaker situation, truly reflect the duty of isolating switch under the high voltage situation, and from test result, analyze the abort situation of isolating switch, be convenient to electric power overhaul personnel quick lock in fault target.This monitoring device compare with the off-line monitoring device real-time good, contain much information, and can reflect location of fault, but usually need be on isolating switch sensor installation and transmission equipment.In addition, because the model and the characterisitic parameter of isolating switch are more, the conventional online monitoring system mostly is to monitor at the performance parameter of the isolating switch of a certain model, does not have versatility.
Make a general survey of the research and the application feature of domestic and international electrical equipment status monitoring, there are the following problems for state monitoring apparatus that has come into operation or system:
(1) monitoring device needs the position of fixation of sensor and transmission equipment before operation, so not only loses time and manpower, and cause inconvenience in the process of carrying.
(2) can not take into account the monitoring of various model isolating switchs, existing monitoring device can only be realized the monitoring of a certain model circuit breaker parameters, or can only realize the on-line monitoring of a certain parameter of multiple model isolating switch.
(3) can not reflect the running status of isolating switch in real time neatly, most monitoring devices with the information stores of gathering in storer, and then transmit the data of collection by the mode of communicating by letter with host computer, thereby further analyze the ruuning situation of isolating switch, this can not reflect the status information of isolating switch effectively in time.
Summary of the invention
The present invention is for solving the above-mentioned problems in the prior art, a kind of miniaturization characteristics, easy to carry that have are provided, can in time understanding the monitoring device of multiple model working state of circuit breaker.
The technical problem to be solved in the present invention: the problem that needs different monitoring device monitorings and sensor installation at the isolating switch of different model, a kind of portable beaker state monitor is provided, status information with record isolating switch each parameter in operational process, and rely on digital signal processor (DSP) and jumbo flash memory (K9K1G08U0M FLASH) to realize information acquisition and storage, at last by the liquid crystal display of graphical dots configuration, to determine isolating switch is in operation whether there is fault, the hidden danger that may exist is in time got rid of, minimizing accident to greatest extent and loss.
Technical solution of the present invention: based on portable consideration, designed device, and provide two kinds of power supply powering modes so that experiment with miniaturization characteristics; Install and general consideration based on convenient, the source of selecting for use clamp sensor to obtain as information, the signal that sensor is obtained is nursed one's health then, adopt DSP to realize the collection and the processing of signal, with the information stores of gathering in jumbo flash memory, with graphical dots configuration liquid crystal display waveform, conveniently circuit-breaker status is carried out real-time analysis and processing on the spot at last.
A kind of portable beaker state monitor of the present invention is made up of device case, clamp sensor, power module and hardware circuit module.Position annexation therebetween is: power module and internal hardware circuit module place in the device case, and clamp sensor places outside the device case; They connect by the signaling interface that device case front panel is provided with each other.Its signal trend by: clamp sensor is directly clamped and is surveyed a certain measuring position of isolating switch, the signal that obtains is sent to the internal hardware circuit through the signaling interface of device case front panel, signal is amplified to it by amplifying circuit in the voltage range of DSP acceptance after electromagnetic interference (EMI) suppresses then, then DSP inside carries AD signals collecting is stored in the jumbo flash memory, the signal of Cai Jiing can show in real time by the liquid crystal that is installed on the device case top panel at last, or shows on host computer by the communication interface of device case front panel.
Described device case is interior short side shape casing, is that galvanized steel plain sheet is made, and is combined by front panel, rear panel, top panel, lower panel, left plate and right plate.The front panel of device case is provided with power supply selector button, charging inlet, signaling interface and communication interface with pc; The device case top panel be provided with the groove that keyboard and LCDs are installed; The rear panel two ends of device case are provided with handle, make things convenient for lab assistant to carry.The inside of device case is provided with a plurality of screws, is convenient to fixedly mount hardware circuit board, rechargeable battery and Switching Power Supply.Wherein the charging inlet of front panel design is for making things convenient for battery charge design in the monitor; Signaling interface is to make things convenient for the signal of clamp sensor collection to be sent to the internal hardware circuit module; Reservation is to make things convenient for the maintainer after having gathered the parameter of isolating switch with the communication interface of host computer, by the runnability of this interface reading of data with further analysis isolating switch; Keyboard Designing on the top panel of device case, is conveniently controlled the operation of whole monitor; LCDs is the running status of monitoring breaker in real time, to reach the purpose of on-site-inspection.The size of said apparatus case and the design of each panel have highlighted portable and general consideration.
Described clamp sensor is a clamp current transformer.This clamp sensor is connected with the front panel signaling interface of device case.Owing to comprise direct current signal and AC signal in the circuit breaker parameters of the present invention's monitoring, therefore the clamp sensor of selecting for use is the AC/DC current transformer, select for use this clamp sensor need not cut off the power supply, need not tear open under the situation of pulling out the circuit of isolating switch, direct and circuit breaker current is carried out message exchange, and such selection highlights the portable and general characteristics of monitor more.
Described power module is to be the operation of whole device power supply, comprises the 220V Alternating Current Power Supply and carries powered battery, and the selection of the front panel button by the device case can be provided with power supply mode.This design makes things convenient for experimenter's autonomous required power supply mode of selection under different environment.
Described internal hardware circuit module, comprise signal Processing and memory module, waveform display module two parts, relation is therebetween: signal after signal Processing and memory module with data storage in flash memory, liquid crystal or host computer can be from flash memory reading of data and display waveform; The function of this signal Processing and memory module comprises the storage of amplification, AD conversion and the data of inhibition, the signal of electromagnetic interference (EMI), relation is therebetween: the signal of clamp sensor collection is sent to amplifying circuit after the inhibition of electromagnetic interference (EMI), signal is amplified in the voltage range that DSP accepts, and is that digital signal is stored in the flash memory by the AD that DSP inside carries with analog signal conversion; The inhibition of this electromagnetic interference (EMI) is: the mode that adopts voltage dependent resistor (VDR) and TVS parallel connection is to suppress electromagnetic interference (EMI), and wherein voltage dependent resistor (VDR) can absorb a large amount of surge voltages, and TVS tube reaction speed is very fast, can in time play inhibiting effect to electromagnetic interference (EMI); The amplification of this signal is: adopt the mode of difference input to suppress the interference of common-mode signal to signal, and signal is amplified in the voltage range of DSP acceptance; This AD conversion is: adopt that DSP carries the ADC module, the 16 passage analog-digital converters that this module is one 12 bit resolution, have pipeline organization, built-in two sampling-retainer can reach 25MHZ fast switching time, and maximum provides 16 automatic A/D conversions in the single time period.Adopt the purpose of this AD modular converter to be, when adopting DSP to build data acquisition system (DAS), needn't external ADC, avoided the complicated hardware design; The storage of these data is: flash memory directly links to each other with the pin of DSP, and after AD converts, data will be sent in the flash memory.Chip is sent into by multiplexing 8 I/O in the address of flash memory.Such design has significantly reduced the number of pins of chip, for the upgrading of system has brought convenience, and has overcome RAM, E
2The shortcoming of PROM, writing speed reach μ s level, and be erasable at least more than 10000 times, realizes online programming.Because the running environment of isolating switch is subject to the influence of various electromagnetic interference (EMI), therefore signal inhibition through electromagnetic interference (EMI) earlier before amplifying is handled, difference is amplified in the voltage range of DSP permission again, at last signal is stored in the jumbo flash memory after the AD conversion.
This waveform display module has liquid crystal display of graphical dots configuration and host computer to show dual mode.Requirement according to display waveform and a plurality of parameters, select 320 * 240 graphical dots configuration Liquid Crystal Module for use, after data acquisition is finished, the relevant parameter waveform that can show isolating switch in real time by the control of keyboard, wherein because the time of motor energy storage current acquisition is longer, liquid crystal display can't be finished demonstration by a screen, therefore adopts the mode that dynamically shows to observe the running status of isolating switch on the spot to make things convenient for the maintainer, this display mode flexibly, intuitively can reach the purpose of on-site-inspection.Be reserved with the interface with upper machine communication on the front panel of device case, make things convenient for the maintainer further to analyze isolating switch and whether have potential faults.
Wherein, the physical dimension of this device case is 39cm * 34cm * 14.7cm;
Wherein, the model of this clamp sensor is APPA30T;
Wherein, the model of this power module is FYS-14.8V/8.8Ah;
Wherein, this keyboard is selected 4 * 4 Keysheet modules for use.
The principle of work flow process of this device is as follows: the internal hardware circuit that the breaker signal of clamp sensor collection is sent to monitor by the signaling interface in the front panel of device case, signal is after conditioning, amplifying, adopt DSP to finish the collection and the processing of signal, and with the signal storage after the AD conversion in flash memory, finally realize the demonstration and the analysis of waveform by the real-time display waveform of graphical dots configuration liquid crystal or with upper machine communication.
The present invention's advantage compared with prior art is:
1) have the monitoring device miniaturization, be convenient to install the characteristics of carrying;
2) acquired signal adopts DSP and the jumbo flash memory that travelling speed is fast, arithmetic capability is strong to handle and store after the overvoltage overcurrent protection, to satisfy the collection of multiple model isolating switch different parameters, has realized the characteristics of device versatility;
3) adopt liquid crystal display to reach the purpose of monitoring on the spot, be convenient to the duty that the monitoring personnel in time understand and grasp isolating switch, analyze it and whether have potential faults, reduce unnecessary loss as much as possible.
Description of drawings
Fig. 1 is a monitor one-piece construction block diagram.
Fig. 2 is a monitor overall work process flow diagram.
Fig. 3 is a signal over-voltage over-current protection theory diagram.
Embodiment
A kind of portable beaker state monitor of the present invention is made up of device case, clamp sensor, power module and internal hardware circuit module.Position annexation therebetween is: power module and internal hardware circuit module place in the device case, and clamp sensor places outside the device case; They connect by the signaling interface that device case front panel is provided with each other.Its signal trend by: clamp sensor is directly clamped and is surveyed a certain measuring position of isolating switch, the signal that obtains is sent to the internal hardware circuit module through the signaling interface of device case front panel, signal is amplified to it by the amplifying circuit in the internal hardware circuit module in the voltage range of DSP acceptance after electromagnetic interference (EMI) suppresses then, then DSP inside carries AD signals collecting is stored in the jumbo flash memory, the signal of Cai Jiing can show in real time by the liquid crystal that is installed on the device case top panel at last, or shows on host computer by the communication interface of device case front panel.
Fig. 1 is a monitor one-piece construction block diagram.This monitor is made up of device case, clamp sensor, power module and internal hardware circuit module.Power module and internal hardware circuit module place in the device case, and clamp sensor places outside the device case.Clamp sensor is sent to hardware circuit module with the signal of gathering by the signaling interface that installs the setting of case front panel.Power module is the operation power supply of whole device.Device internal hardware circuit is fast with execution speed, and the DSP that arithmetic capability is strong is a core, has finished the collection of signal, has been connected with jumbo flash memory and has realized the storage of data, communicates by letter with host computer or liquid crystal and has realized the demonstration of data waveform.This monitor can be monitored the isolating switch of multiple model, and monitoring parameter is many, and it is many that function realizes, the program complexity, and space able to programme is big, instruction execution speed is fast, arithmetic capability is strong so primary processor is selected for use, carry the DSP F2812 of 12 AD.The signal that gather on each road is sent into AD translation interface among the DSP by corresponding signal conditioning circuit and excess voltage protection, and DSP carries out collection, analysis and the processing of data.According to design objective, the circuit breaker parameters that monitor is gathered a kind of model approximately needs the storage space of 1.8022K, with 15 kinds of model isolating switchs is example, Cun Chu data are 15 * 1802.2=27033K altogether, the AD conversion that DSP inside carries is 12, is converted to 16 during storage, so memory capacity is 27033 * 16/8=54066KB ≈ 53MB, therefore, selecting capacity for use is that the K9K1G08U0M flash memory of 128MB is as storage chip.
Wherein, the physical dimension of this device case is 39cm * 34cm * 14.7cm;
Wherein, the model of this clamp sensor is APPA30T;
Wherein, the model of this power module is FYS-14.8V/8.8Ah;
Wherein, this keyboard is selected 4 * 4 Keysheet modules for use.
Figure 2 shows that the overall system workflow diagram.After finishing DSP, liquid crystal and flash memory initialization, by button model, sampling time and the sampling threshold of isolating switch are set, begin to start the AD conversion then, until having sampled, wait for next step operational order, to determine the continuation sampling or to carry out the demonstration of data waveform.When select adopting liquid crystal display, select the different parameters of different model isolating switch by button, behind parameter setting, the DSP primary processor reads the sampled data of corresponding parameter from the corresponding flash memory storage area, thus on module display waveform.When communicating by letter with host computer, select the data of respective model to be sent out by button, upper computer software begins to receive data simultaneously, handles data archiving and display waveform through data separating then.After a flow process is finished, can repeat said process.
Figure 3 shows that signal over-voltage over-current protection theory diagram.This part belongs to the internal hardware circuit of monitor.Circuit breakers monitoring device is subjected to the influence of various electromagnetic interference (EMI) in actual motion, and signal input channel is the main path of electromagnetic interference (EMI) access to plant, after electromagnetic interference (EMI) is amplified through signal, the reliability service of monitoring device has been caused great threat.Therefore, should before amplifying, take signal corresponding measure to suppress electromagnetic interference (EMI).Tackling the effective method of electromagnetic disturbance is to adopt transition harassing and wrecking absorbers, comprises voltage dependent resistor (VDR), TVS and gas-discharge tube.When electromagnetic interference (EMI) is accompanied by the analog acquisition signal and enters the amplifier front end, voltage dependent resistor (VDR) has absorbed a large amount of surges and has disturbed, simultaneously for to guarantee that superpotential amplitude is clamped in the maximum working voltage scope of amplifier fully, added stabilivolt in the voltage dependent resistor (VDR) back, the effect of resistance and inductance is a current limliting, to guarantee that diode can not damage owing to electric current is excessive.
Claims (5)
1. portable beaker state monitor, it is characterized in that: it is made up of device case, clamp sensor, power module and hardware circuit module, power module and internal hardware circuit module place in the device case, clamp sensor places outside the device case, and they connect by the signaling interface that device case front panel is provided with each other; Its signal trend by: clamp sensor is directly clamped and is surveyed a certain measuring position of isolating switch, the signal that obtains is sent to the internal hardware circuit through the signaling interface of device case front panel, signal is amplified to it by amplifying circuit in the voltage range of digital signal processor acceptance after electromagnetic interference (EMI) suppresses then, then digital signal processor inside carries AD signals collecting is stored in the jumbo flash memory, the signal of Cai Jiing shows in real time by the liquid crystal that is installed on the device case top panel at last, or shows on host computer by the communication interface of device case front panel;
Described device case is interior short side shape casing, is that galvanized steel plain sheet is made, and is combined by front panel, rear panel, top panel, lower panel, left plate and right plate; The front panel of device case is provided with power supply selector button, charging inlet, signaling interface and communication interface with pc; The device case top panel be provided with the groove that keyboard and LCDs are installed; The rear panel two ends of device case are provided with handle, make things convenient for lab assistant to carry, and the inside of device case is provided with a plurality of screws, is convenient to fixedly mount hardware circuit board, rechargeable battery and Switching Power Supply; Wherein the charging inlet of front panel design is for making things convenient for battery charge design in the monitor; Signaling interface is to make things convenient for the signal of clamp sensor collection to be sent to the internal hardware circuit module; Reservation is to make things convenient for the maintainer after having gathered the parameter of isolating switch with the communication interface of host computer, by the runnability of this interface reading of data with further analysis isolating switch; Keyboard Designing on the top panel of device case, is conveniently controlled the operation of whole monitor; The running status of the real-time monitoring breaker of LCDs is to reach the purpose of on-site-inspection;
Described clamp sensor is a clamp current transformer, and this clamp sensor is connected with the front panel signaling interface of device case; Owing to comprise direct current signal and AC signal in the circuit breaker parameters of monitoring, therefore the clamp sensor of selecting for use is the AC/DC current transformer;
Described power module is to be the operation of whole device power supply, comprises the 220V Alternating Current Power Supply and carries powered battery, and the selection of the front panel button by the device case is provided with power supply mode;
Described internal hardware circuit module comprises signal Processing and memory module, waveform display module two parts, signal after signal Processing and memory module with data storage in flash memory, liquid crystal or host computer can be from flash memory reading of data and display waveform; The function of this signal Processing and memory module comprises the storage of amplification, AD conversion and the data of inhibition, the signal of electromagnetic interference (EMI), relation is therebetween: the signal of clamp sensor collection is sent to amplifying circuit after the inhibition of electromagnetic interference (EMI), signal is amplified in the voltage range that digital signal processor accepts, and is that digital signal is stored in the flash memory by the AD that digital signal processor inside carries with analog signal conversion; The inhibition of this electromagnetic interference (EMI) is: the mode that adopts voltage dependent resistor (VDR) and TVS parallel connection is to suppress electromagnetic interference (EMI), and wherein voltage dependent resistor (VDR) absorbs a large amount of surge voltages, and TVS tube reaction speed is fast, in time electromagnetic interference (EMI) is played inhibiting effect; The amplification of this signal is: adopt the mode of difference input to suppress the interference of common-mode signal to signal, and signal is amplified in the voltage range of digital signal processor acceptance; This AD conversion is: adopt that digital signal processor carries the ADC module, the 16 passage analog-digital converters that this module is one 12 bit resolution, have pipeline organization, built-in two sampling-retainer, can reach 25MHZ switching time fast, maximum provides 16 automatic A/D conversions in the single time period; The storage of these data is: flash memory directly links to each other with the pin of digital signal processor, and after AD converts, data will be sent in the flash memory; Chip is sent into by multiplexing 8 I/O in the address of flash memory; Because the running environment of isolating switch is subject to the influence of various electromagnetic interference (EMI), therefore signal inhibition through electromagnetic interference (EMI) earlier before amplifying is handled, difference is amplified in the voltage range of digital signal processor permission again, at last signal is stored in the jumbo flash memory after the AD conversion;
This waveform display module has liquid crystal display of graphical dots configuration and host computer to show dual mode.According to the requirement of display waveform and a plurality of parameters, select 320 * 240 graphical dots configuration Liquid Crystal Module for use, after data acquisition is finished, show the relevant parameter waveform of isolating switch in real time by the control of keyboard.
2. a kind of portable beaker state monitor according to claim 1 is characterized in that: the physical dimension of this device case is 39cm * 34cm * 14.7cm.
3. a kind of portable beaker state monitor according to claim 1 is characterized in that: the model of this clamp sensor is APPA30T.
4. a kind of portable beaker state monitor according to claim 1, it is characterized in that: the model of this power module is FYS-14.8V/8.8Ah.
5. a kind of portable beaker state monitor according to claim 1, it is characterized in that: this keyboard is selected 4 * 4 Keysheet modules for use.
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| CN201110207588.4A CN102288909B (en) | 2011-07-23 | 2011-07-23 | Portable breaker state monitor |
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| CN201110207588.4A CN102288909B (en) | 2011-07-23 | 2011-07-23 | Portable breaker state monitor |
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| CN103064018A (en) * | 2012-12-27 | 2013-04-24 | 江苏省电力公司电力科学研究院 | Vehicle-mounted circuit resistance integrated test system for switch dynamic characteristics |
| CN105679570A (en) * | 2016-02-26 | 2016-06-15 | 电卫士智能电器（北京）有限公司 | Circuit breaker monitoring device, circuit breaker and circuit breaker monitoring method |
| CN106771998A (en) * | 2016-11-22 | 2017-05-31 | 国网山东省电力公司东营供电公司 | A kind of tester for testing RCCB |
| CN107910960A (en) * | 2017-12-20 | 2018-04-13 | 天津瑞能电气有限公司 | A kind of load condition monitoring device micro-capacitance sensor early period |
| CN108205107A (en) * | 2016-12-16 | 2018-06-26 | 陈锡瑜 | Make and break contact state examines showing device and method |
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| CN103064018A (en) * | 2012-12-27 | 2013-04-24 | 江苏省电力公司电力科学研究院 | Vehicle-mounted circuit resistance integrated test system for switch dynamic characteristics |
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| CN108205107A (en) * | 2016-12-16 | 2018-06-26 | 陈锡瑜 | Make and break contact state examines showing device and method |
| CN107910960A (en) * | 2017-12-20 | 2018-04-13 | 天津瑞能电气有限公司 | A kind of load condition monitoring device micro-capacitance sensor early period |
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| Publication number | Publication date |
|---|---|
| CN102288909B (en) | 2014-08-20 |
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