CN102564493B - Online monitoring system for galloping of overhead power transmission line - Google Patents
Online monitoring system for galloping of overhead power transmission line Download PDFInfo
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Abstract
The invention belongs to the technical field of power transmission line state monitoring, and discloses an online monitoring system for galloping of an overhead power transmission line. The online monitoring system is characterized in that the online monitoring system for the line of each span consists of a plurality of monitoring substations, two monitoring master stations and a background monitoring upper computer, wherein the monitoring substations are arranged on the transmission line; the two monitoring master stations are arranged on towers respectively; the background monitoring upper computer is arranged in a monitoring center; the two master stations and the plurality of substations monitor the galloping state of the line of each span; the substations accurately position the galloping of the line by utilizing acceleration sensors, and upload positioning data to the master stations through short-range radio frequency; each master station receives galloping monitoring data from four nearby substations, and uploads the monitoring data and environmental meteorological data to the background monitoring upper computer through a general packet radio service (GPRS); and when each master station synchronizes a clock through a global positioning system (GPS) module, the synchronism of the uploaded data is ensured. The online monitoring system has a small volume, low influence on mechanical properties of the line, high dynamic performance and high data monitoring accuracy, is low in cost, and can work round the clock.
Description
Technical field
The invention belongs to power transmission state monitoring technical field, relate to a kind of overhead transmission line galloping on-line monitoring system, be specially one and wave on-line monitoring system based on the overhead transmission line of short range radio frequency/acceleration transducer/GPS.
Background technology
The reliability of grid power transmission depends on the reliability of Research Work of Power Transmission Line state to a great extent.Overhead transmission line long-time running is under open-air condition, and the effect of natural conditions such as wind-engaging, rain, ice, thunder and lightning are comparatively large, and its duty can not be guaranteed.Especially when windage yaw occurring and the abnormality such as waving, may there is flashover, tripping operation in circuit, even the accident such as tower.
China is vast in territory, climate variability, windage yaw and wave abnormality pests occurrence rule and inherent mechanism different.Especially in recent years, affect by global climate environmental change, the rainfall of coastland weather, intensity of sunshine, the weather conditions such as wind direction and humiture and hinterland climate difference strengthen year by year, and the windage yaw of coastland circuit, the performance degree of waving state and probability of happening cannot with reference to hinterland related datas.In order to the economic loss of inquiring about culprit quickly and efficiently, reduction line accident causes, accurately early warning, the full and accurate science data and the theoretical foundation that provide Transmission Line Design and technological transformation are carried out to accident, be necessary that the cause-effect relationship corresponding to coastland circuit unusual condition and various environment, weather data is launched to study, and look for windage yaw and reason that state of waving occurs and rule.The typhoon climate central wind of coastal uniqueness can reach more than 17 grades, the basic reason occurred in order to more deep analysis coastland circuit windage yaw and state of waving and rule, also need studying without the windage yaw of ice circuit, the state such as to wave of bringing out under high wind conditions.
Since 2000, domestic electrical network occur much because of power transmission line windage yaw, the accident that abnormality causes such as to wave, therefore each research institution has carried out large quantity research for the exploitation of transmission line status analysis theories and monitoring system.Application publication number is the Chinese invention patent " transmission conductor waving monitoring system and monitoring method based on GPS " of " CN 101975565A ", disclose a kind of transmission conductor waving monitoring system based on GPS and monitoring method, but its positioning error is comparatively large, is generally 1 to 10 meter.The Chinese invention patent " transmission line wire based on differential GPS is waved and windage yaw on-line monitoring system " that application publication number is " CN 101986100A ", disclose a kind of power transmission circuit caused by windage based on differential GPS, wave on-line monitoring system, although its location is comparatively accurate, but need to set up differential GPS base station, high cost.Application publication number is the Chinese invention patent " the transmission line galloping on-line monitoring system based on acceleration transducer " of " CN 101571413A ", disclose a kind of transmission line galloping on-line monitoring system based on acceleration transducer, a line span is equipped with a main website and a plurality of substation, substation and main website distant, substation data need be uploaded to main website by high-power RF, high-power RF module volume is large, cost is high, line oscillation mechanical characteristic can be affected, potential threat is caused to line oscillation.The present invention is open a kind of waves on-line monitoring system based on the overhead transmission line of short range radio frequency/acceleration transducer/GPS, and system bulk is little, little on the impact of circuit mechanical characteristic, dynamic property good, data monitoring precision is high, with low cost, can all weather operations.
Summary of the invention
Technical matters to be solved by this invention is for the deficiencies in the prior art, there is provided a kind of rational in infrastructure, easy to use, can the scene temperature of circuit in on-line monitoring high-voltage operation, humidity, wind speed, wind direction, intensity of sunshine and conductor temperature, gravity, the isoparametric a kind of transmission line galloping on-line monitoring system of amplitude of waving.
For achieving the above object, the present invention adopts following technical scheme: the present invention is a kind of overhead transmission line galloping on-line monitoring system, is characterized in: the on-line monitoring system of each span circuit is arranged on two monitoring main websites on shaft tower and the background monitoring host computer that is arranged on Surveillance center forms by several monitoring sub-stations be arranged on transmission line of electricity, respectively;
Described monitoring sub-station comprises STM32 single-chip microcomputer, and STM32 single-chip microcomputer is connected with intelligent protection CT power supply, wire temperature sensor, acceleration transducer and RF radio-frequency module; Wire temperature sensor is connected with the AD pin of described STM32 single-chip microcomputer; The I of acceleration transducer and described STM32 single-chip microcomputer
2c pin is connected; RF radio-frequency module is connected with the UART pin of described STM32 single-chip microcomputer; Monitoring sub-station utilizes acceleration transducer accurately to locate line oscillation, and locator data is uploaded to by RF radio-frequency module and more closely monitors main website;
Described monitoring main website comprises STM32 single-chip microcomputer main website control system, supply module, GPRS module, RF radio-frequency module, GPS module, environment humidity sensor, wind speed wind direction sensor, solar radiation sensor and rain sensor; GPRS module, RF radio-frequency module, GPS module are connected with the UART pin of described STM32 single-chip microcomputer main website control system; Environment humidity sensor is connected with the SPI pin of STM32 single-chip microcomputer main website control system; Wind speed wind direction sensor, solar radiation sensor and rain sensor are connected with the AD pin of STM32 single-chip microcomputer main website control system; Described supply module comprises photo-voltaic power supply, and photo-voltaic power supply is connected with control module, more in parallel with accumulator, last and load in series;
What each monitoring main website received nearlyer monitoring sub-station waves Monitoring Data, by GPRS module by Monitoring Data and environment weather data upload to background monitoring host computer; When to be undertaken pair by GPS module, ensure the synchronism of uploading data.
In overhead transmission line galloping on-line monitoring system of the present invention: described intelligent protection CT power supply can use conventional intelligent power or CT power supply disclosed in prior art, and preferred intelligent protection CT power supply comprises electricity-fetching module, electric energy conditioning module, intelligent protection module;
Described electricity-fetching module is containing bus, current transformer core, secondary coil, sample resistance, a single-pole double-throw relay; A bus is through described current transformer core; Secondary coil is around on current transformer core, and in parallel with sample resistance, then connects with single-pole double-throw relay;
Described electric energy conditioning module, containing rectification circuit, most advanced and sophisticated leadage circuit, ripple filtering electric capacity, mu balanced circuit, is sequentially connected in series between each circuit; Described most advanced and sophisticated leadage circuit comprises stabilivolt, stabilivolt is connected with stabilivolt current-limiting resistance afterwards and the direct current output-parallel of rectifier bridge, another current-limiting resistance in parallel in the middle of it, this current-limiting resistance is connected with power tube gate pole, to control the voltage of power tube conducting or shutoff;
Described intelligent protection circuit comprises STM8 single-chip microcomputer, RF radio-frequency module and super capacitor; RF radio-frequency module is connected with the UART pin of described STM8 single-chip microcomputer; Super capacitor is connected in parallel on the feeder ear of described STM8 single-chip microcomputer.
In overhead transmission line galloping on-line monitoring system technical scheme of the present invention, each components and parts, module and control system if no special instructions, all can use disclosed in prior art and be applicable to components and parts of the present invention, module and control system.
The number of the monitoring sub-station in the present invention on each span circuit sets on demand, presses the length of circuit during setting, and the monitoring sub-station generally on each span circuit is about 8.
Background monitoring host computer of the present invention can install analysis expert software; Be preferably with following functions: display, storage Monitoring Data, for dispatcher provides defeated various parameter to understand line security, maintenance in time and control.
Described monitoring sub-station adopts intelligent protection CT power supply to power, and monitoring main website adopts supply module to power, and described background monitoring host computer can by mains-supplied.433MHz short distance RF technical communication can be adopted between described monitoring sub-station and monitoring main website, between described monitoring main website and monitoring host computer, adopt the technical communication of GPRS long distance wireless.When high-pressure side line current is excessive, unnecessary induction electric energy is converted to heat energy and releases by described most advanced and sophisticated leadage circuit.When protection circuit temperature rise of releasing is too high, described intelligent protection module will cut off current supply circuit, until power source temperature is reduced to permission working temperature.
Compared with prior art, present system volume of the present invention little, on circuit mechanical characteristic impact little, dynamic property good, data monitoring precision is high, with low cost, can all weather operations.Owing to adopting acceleration transducer/GPS combination, can accurately locate and can ensure the synchronism of uploading data, and cost comparatively to build differential GPS base station much lower.Application of the present invention can save human and material resources and time, can avoid causing large face power outage, for safety power transmission provides effective measure, can be widely used on ultra-high-tension power transmission line.
Accompanying drawing explanation
Fig. 1 is that one of the present invention arranges schematic diagram;
Fig. 2 is the structured flowchart of monitoring sub-station of the present invention;
Fig. 3 is intelligent protection CT power supply architecture schematic block diagram of the present invention;
Fig. 4 is the structured flowchart of monitoring main website of the present invention;
Fig. 5 is the structural schematic block diagram of supply module of the present invention.
Embodiment
Referring to accompanying drawing, further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, with reference to Fig. 1-5, a kind of overhead transmission line galloping on-line monitoring system, be distributed in and need to wave on the transmission line of electricity of monitoring, as shown in Figure 1, the on-line monitoring system in each line span is made up of eight monitoring sub-stations 1 be arranged on transmission line of electricity, the monitoring host computer 3 that is arranged on shaft tower two monitoring main websites 2 and is arranged on Surveillance center.Wherein communicated by short distance RF technology between monitoring sub-station 1 and nearer monitoring main website 2; Communicated by GPRS technology between monitoring main website 2 with monitoring host computer 3.
As shown in Figure 2, described monitoring sub-station 1 comprises STM32 single-chip microcomputer 11, intelligent protection CT power supply 12, wire temperature sensor 13, acceleration transducer 14, RF radio-frequency module 15.Wire temperature sensor 13(can use thermistor MF52) and acceleration transducer 14(MMA7455) by the conductor temperature recorded and wave parameter and deposit in STM32 single-chip microcomputer 11, by RF radio-frequency module 15(Si4432) send the data to monitoring main website 2.In operational process, monitoring sub-station 1 is powered by intelligent protection CT power supply 12.
As shown in Figure 3, described intelligent protection CT power supply 12 comprises electricity-fetching module 121, electric energy conditioning module 122, intelligent protection module 123;
Described electricity-fetching module is containing bus 1211, current transformer core 1212, secondary coil 1213, sample resistance 1214, a single-pole double-throw relay 1215; A bus 1211 is through described current transformer core 1212; Secondary coil 1213 is around on current transformer core 1212, and in parallel with sample resistance 1214, then connects with single-pole double-throw relay 1215;
Described electric energy conditioning module is containing rectification circuit 1221, most advanced and sophisticated leadage circuit 1222, ripple filtering electric capacity 1223, mu balanced circuit 1224; Be sequentially connected in series between each circuit; Described most advanced and sophisticated leadage circuit 1222 comprises stabilivolt, stabilivolt is connected with stabilivolt current-limiting resistance afterwards and the direct current output-parallel of rectifier bridge, another current-limiting resistance in parallel in the middle of it, this current-limiting resistance is connected with power tube gate pole, to control the voltage of power tube conducting or shutoff
Described intelligent protection module is containing STM8 single-chip microcomputer 1231, RF radio-frequency module 15 and super capacitor.RF radio-frequency module 15 is connected with the UART pin of described STM8 single-chip microcomputer 1231; Super capacitor is connected in parallel on the feeder ear of described STM8 single-chip microcomputer 1231.
A described bus 1211 is connected with the alternating current of constant amplitude, will produces alternating magnetic field around circuit, and produce the magnetic flux of alternation on described iron core 1212, this magnetic flux will induce the induction current of alternation on described inductive coil 1213.Induction current becomes electromotive force and exports on described sample resistance 1214.At described single-pole double-throw relay 1215(JQC-3F) under closed condition, described induction electromotive force becomes pulsating dc voltage after rectification circuit 1221 rectification.The spike energy of pulsating direct current, after described most advanced and sophisticated leadage circuit 1222, is released by pulsating dc voltage, then can by larger voltage ripple filtering through described filter capacitor 1223.Finally, this voltage is down to 5.5V after mu balanced circuit 1224, for use.
In whole circuit operational process, described single chip control module 1231, can monitor the working temperature of most advanced and sophisticated leadage circuit 1222, and preset temperature exceeds standard threshold value, recover threshold value and the duration that exceeds standard.After working temperature exceeds standard, described single chip control module 1231 disconnects feed circuit by described single-pole double-throw relay 1215, recover after threshold value until the working temperature of described most advanced and sophisticated leadage circuit 1222 enters, described single-pole double-throw relay 1215 accesses feed circuit again.After power supply disconnects, described single chip control module 1231 is by interior super capacitances to supply power.When exceeding standard in duration default, when the working temperature of described most advanced and sophisticated leadage circuit 1222 can not enter and recover threshold value, described RF radio-frequency module 15 starts, and issues the order of supply unit fault.
As shown in Figure 4, described monitoring main website 2 comprises STM32 single-chip microcomputer main website control system 21, supply module 22, GPRS module 23, RF radio-frequency module 15, GPS module 25, environment humidity sensor 26, wind speed wind direction sensor 27, solar radiation sensor 28, rain sensor 29.Environment humidity sensor 26(SHT71), wind speed wind direction sensor 27(BCQ-FS-BA), solar radiation sensor 28(GZD system), the environmental parameter recorded deposits in STM32 single-chip computer control system 21, by GPRS module 23(EM310 by rain sensor (WD211)) by these data and by RF radio-frequency module 15(Si4432) in the monitoring sub-station 1 that receives survey data and send to Surveillance center 3 in the lump.In operational process, supply module 22 is powered to monitoring main website 2; GPS module 25(EM310) when to carry out pair, ensure the synchronism of uploading data.
As shown in Figure 5, described supply module 22, is made up of solar photovoltaic power 221, accumulator 222 and control module 223.Photo-voltaic power supply 221 carries out electric energy conditioning by control module, and accumulators 222 charges, then by accumulator to rear load supplying.
The monitoring substation of the present embodiment utilizes acceleration transducer accurately to locate line oscillation, locator data is uploaded to master station by short range radio frequency, each master station receive four more closely monitor substation wave Monitoring Data, by GPRS by Monitoring Data and environment weather data upload to background monitoring host computer.When each master station to be undertaken pair by GPS module, ensure the synchronism of uploading data.
Claims (1)
1. an overhead transmission line galloping on-line monitoring system, is characterized in that: the on-line monitoring system of each span circuit is arranged on two monitoring main websites on shaft tower and the background monitoring host computer that is arranged on Surveillance center forms by several monitoring sub-stations be arranged on transmission line of electricity, respectively;
Described monitoring sub-station comprises STM32 single-chip microcomputer, and STM32 single-chip microcomputer is connected with intelligent protection CT power supply, wire temperature sensor, acceleration transducer and RF radio-frequency module; Wire temperature sensor is connected with the AD pin of described STM32 single-chip microcomputer; The I of acceleration transducer and described STM32 single-chip microcomputer
2c pin is connected; RF radio-frequency module is connected with the UART pin of described STM32 single-chip microcomputer; Monitoring sub-station utilizes acceleration transducer accurately to locate line oscillation, and locator data is uploaded to by RF radio-frequency module and more closely monitors main website;
Described monitoring main website comprises STM32 single-chip microcomputer main website control system, supply module, GPRS module, RF radio-frequency module, GPS module, environment humidity sensor, wind speed wind direction sensor, solar radiation sensor and rain sensor; GPRS module, RF radio-frequency module, GPS module are connected with the UART pin of described STM32 single-chip microcomputer main website control system; Environment humidity sensor is connected with the SPI pin of STM32 single-chip microcomputer main website control system; Wind speed wind direction sensor, solar radiation sensor and rain sensor are connected with the AD pin of STM32 single-chip microcomputer main website control system; Described supply module comprises photo-voltaic power supply, and photo-voltaic power supply is connected with control module, more in parallel with accumulator, last and load in series;
What each monitoring main website received nearlyer monitoring sub-station waves Monitoring Data, by GPRS module by Monitoring Data and environment weather data upload to background monitoring host computer; When to be undertaken pair by GPS module, ensure the synchronism of uploading data;
Wherein, described intelligent protection CT power supply comprises electricity-fetching module, electric energy conditioning module, intelligent protection module; Described electricity-fetching module is containing bus, current transformer core, secondary coil, sample resistance, a single-pole double-throw relay; A bus is through described current transformer core; Secondary coil is around on current transformer core, and in parallel with sample resistance, then connects with single-pole double-throw relay; Described electric energy conditioning module, containing rectification circuit, most advanced and sophisticated leadage circuit, ripple filtering electric capacity, mu balanced circuit, is sequentially connected in series between each circuit; Described most advanced and sophisticated leadage circuit comprises stabilivolt, stabilivolt is connected with stabilivolt current-limiting resistance afterwards and the direct current output-parallel of rectifier bridge, another current-limiting resistance in parallel in the middle of it, this current-limiting resistance is connected with power tube gate pole, to control the voltage of power tube conducting or shutoff; Described intelligent protection circuit comprises STM8 single-chip microcomputer, RF radio-frequency module and super capacitor; RF radio-frequency module is connected with the UART pin of described STM8 single-chip microcomputer; Super capacitor is connected in parallel on the feeder ear of described STM8 single-chip microcomputer.
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