CN105137286A - Power transmission line lightning stroke monitoring device and lightning protection level assessment method - Google Patents
Power transmission line lightning stroke monitoring device and lightning protection level assessment method Download PDFInfo
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- CN105137286A CN105137286A CN201510549919.0A CN201510549919A CN105137286A CN 105137286 A CN105137286 A CN 105137286A CN 201510549919 A CN201510549919 A CN 201510549919A CN 105137286 A CN105137286 A CN 105137286A
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Abstract
The invention relates to the technical field of power transmission line lightning stroke monitoring and lightning protection level assessment, especially a power transmission line lightning stroke monitoring device and lightning protection level assessment method. The device comprises a data collection host, a data collection extension unit, a server, and a monitoring center. The data collection host collects a lightning current passing through a power transmission line when lightning stroke happens to the power transmission line, and carries out data interaction with the data collection extension set. The data collection extension set collects the lightning current passing through a lightning conductor when lightning stroke happens to the lightning conductor, and carries out data interaction with the data collection host. The monitoring center achieves the remote access to the server through the Internet, so as to obtain the analysis result of the lightning current information of the power transmission line from the server. The device can effectively guide the lightning protection construction of a conventional line, enables lightning protection to be concentrated on a line weak link, improves the lightning resistance performance of the whole line, improves the efficiency of accident inspection, guarantees the safe and stable operation of the power transmission line, and effectively improves the power supply reliability of a power system.
Description
Technical field
The present invention relates to transmission line lightning stroke monitoring and lightning protection proficiency assessment technical field, is a kind of method of transmission line lightning stroke monitoring device and lightning protection proficiency assessment.
Background technology
Existing lightning strike accident occupies significant proportion in transmission line of electricity line fault, and for reducing lightening hazard, transmission line of electricity lightning Protection Design often adopts zinc oxide surge arresters, reduces stake resistance, sets up the lightning protection measures such as lightning conducter.Assess transmission line of electricity lightning protection level is the important technical instructing transmission line of electricity lightning Protection Design, transformation Lightning stroke Protection Measures for Over-Head Lines.
At present, in the appraisal procedure of existing transmission line of electricity lightning protection level, generally with amplitude of lightning current probability distribution and CG lightning density for parameter calculates, the Thunderstorm Day reckoning that the acquisition of CG lightning density generally counts according to meteorological department's artificial observation draws or adopts the large regions CG lightning density that lightning location system Monitoring Data counts, both all lack specific aim to transmission line of electricity, error is comparatively large, cannot assess the lightning protection level of transmission line of electricity exactly.Also the important parameter of scholar using transmission line lightning stroke trip-out rate as line thunder protection proficiency assessment is had, tripping rate with lightning strike usual rule of thumb formula or realistic model calculate, such as regular method, electromagnetic transient state procedure (EMTP) method and Monte Carlo (MonteCarlo) method.
Lightening activity situation is changeable and complicated, and transmission line lightning stroke tripping operation exists larger randomness, and the same area different times, contemporaneity zones of different are all widely different.Tripping rate with lightning strike computing method traditionally carry out assessment to transmission line of electricity lightning protection level, and to there is error comparatively large, so still take the unified rectification scheme of indifference for the Lightning Transformation of transmission line of electricity, and cost of investment is comparatively large, shortage economy and rationality.
In sum, current power transmission line thunder protection level is generally according to factors such as line corridor lightening activity situation, circuit topography and landform character, line construction, insulation configuration, lightning protection measures, by setting up realistic model or assessing according to relevant code experimental formula, relate to correlative factor more, error is larger.Up to now, still lack a kind of directly by carrying out the means of on-line monitoring to transmission line of electricity and lightning conducter, carry out the method for lightning protection proficiency assessment targetedly according to circuit lightning current information, instruct operational management unit to carry out differentiated lightning protection technological transformation to transmission line of electricity.
Summary of the invention
The invention provides a kind of method of transmission line lightning stroke monitoring device and lightning protection proficiency assessment, overcome the deficiency of above-mentioned prior art, it effectively can solve in prior art to lack and directly carry out the equipment of monitoring by transmission line of electricity and lightning conducter and carry out lightning protection level evaluation method, and existing embodiment cost of investment is large, lack economy and rational problem.
One of technical scheme of the present invention is realized by following measures: a kind of transmission line lightning stroke monitoring device, comprises the data collection host be installed on transmission line of electricity three-phase conducting wire, the data acquisition extension set be installed on electric power line pole tower, server and Surveillance center; Communicated to connect by wireless communication module between data collection host and data acquisition extension set, data collection host is connected with the communication port radio communication of server, by real-time performance data communication between server and control center; Described data collection host comprises Sensor Measurement Unit, data processing unit and wireless communication unit, the output terminal of Sensor Measurement Unit is electrically connected by wire with the input end of data processing unit, and data processing unit is connected with wireless communication unit two-way communication; Described data acquisition extension set comprises the data acquisition extension set Sensor Measurement Unit be arranged on lightning conducter, data acquisition extension set data processing unit and data acquisition extension set wireless transport module, the output terminal of data acquisition extension set Sensor Measurement Unit is electrically connected by wire with the input end of data acquisition extension set data processing unit, and data acquisition extension set data processing unit is connected with wireless transport module two-way communication.
Here is the further optimization and/or improvements to one of foregoing invention technical scheme:
The sensor measuring unit comprises Luo-coil; Or/and described data processing unit is single-chip microcomputer or dsp chip.
Above-mentioned wireless communication unit comprises GPRSDTU module and wireless transport module.
Above-mentioned data collection host also comprises induction energy fetching power module, induction energy fetching power module comprises electromagnetic induction device, overvoltage protection device, rectifier filer, DC/DC converter, controller and energy-storage module, for powering to data collection host and charging to energy-storage module, the output terminal of electromagnetic induction device is electrically connected by wire with the input end of overvoltage protection device, the output terminal of overvoltage protection device is electrically connected by wire with the input end of rectifier filer, the output terminal of rectifier filer is electrically connected by wire with the input end of DC/DC converter, the output terminal of DC/DC converter is electrically connected by wire with the input end of controller, the output terminal of controller is electrically connected by wire with the input end of energy-storage module and data collection host respectively, or/and, data acquisition extension set also comprises solar-electricity source module, and the output terminal of solar-electricity source module is electrically connected by wire with the input end of data acquisition extension set Sensor Measurement Unit, the input end of data acquisition extension set data processing unit and the input end of wireless transport module respectively.
Two of technical scheme of the present invention is realized by following measures, and a kind of method of lightning protection proficiency assessment, comprises the following steps:
Step one: server based on data gathers the latitude and longitude information of main frame mounting points, and the weather information of Real-time Obtaining locality, sends to described data collection host; Data collection host, according to the weather information received, selects the mode of operation of described data acquisition extension set, according to local future weather, if thunderstorm weather, then sends and wakes instruction up, enter step 2 afterwards; If local future weather is non-thunderstorm weather, then sends dormancy instruction, enter step 3 afterwards;
Step 2: data acquisition extension set receives and wakes mode of operation steering order up, namely select to wake mode of operation up, open thunderbolt lightning conducter lightning current high speed acquisition passage and analyzing and processing is carried out to image data, lightning current data after process are sent to data collection host by wireless transport module, enters step 4 afterwards;
Step 3: data acquisition extension set receives dormancy mode of operation steering order, namely selects dormancy mode of operation, closes thunderbolt lightning conducter lightning current high speed acquisition passage; In dormancy mode of operation, to set up with data collection host every 30 seconds and be once connected, receive mode of operation control information next time, wake mode of operation steering order up when receiving, then enter step 2; If receive dormancy mode of operation steering order, Posterior circle perform step 3;
Step 4: the time period of specifying transmission line of electricity lightning protection proficiency assessment, the shielding counterattack type of each transmission line of lightning strike, thunderbolt shaft tower, the amplitude of lightning current of thunderbolt lightning conducter, thunderbolt point and lightning strike accident tripping operation is obtained in this time period from server, statistics causes the amplitude of lightning current of transmission line of electricity emergency stop valve trip, thunderbolt point and type of being struck by lightning, and enters step 5 afterwards;
Step 5: set up two-dimensional coordinate system according to transmission line of electricity overhead line structures coordinate to be assessed, numbering and amplitude of lightning current, draw transmission line of electricity thunderbolt Amplitude density figure, divide section, calculate the lightning strike density of each section at the appointed time in section and thunderbolt intensity, draw and easily hit section;
Lightning strike density:
Thunderbolt intensity:
In formula:
thunderbolt number of times in-the i-th section;
-
ithe line length of individual section, unit kilometer;
-specify evaluation time section, unit year;
-circuit to be assessed divides section complete cross section number;
thunderbolt total degree in-the i-th section;
-kth time amplitude of lightning current maximal value, unit kA;
Wherein, lightning strike density characterizes the probability that this section is struck by lightning, and unit is time/Gong Li ˙, and thunderbolt intensity characterizes the size that this section institute suffers thunderbolt intensity, and unit is kA/ Gong Li ˙, enters step 6 afterwards;
Step 6: set up two-dimensional coordinate system according to transmission line tower coordinate to be assessed, numbering and amplitude of lightning current, according to the section that step 5 divides, draw transmission line of electricity emergency stop valve trip Amplitude density figure, calculate the thunderbolt shielding failure rate of each section at the appointed time in section, counterattack failure rate and total lightning fault rate, draw and easily dodge section; Wherein, the shielding failure rate=shielding number of stoppages/thunderbolt number of times, the counterattack failure rate=counterattack number of stoppages/thunderbolt number of times, total lightning fault rate equal shielding failure rate and counterattack failure rate sum, enter step 7 afterwards;
Step 7: according to each section of step 6 total lightning fault rate result of calculation, grade classification is carried out to transmission line of electricity to be assessed each section lightning protection level.
Here is the further optimization and/or improvements to foregoing invention technical scheme two:
The method of above-mentioned transmission line of electricity thunderbolt point location sets burst length between two monitoring points as L, and when transmission line of lightning strike occurs in the A point between two monitoring points, namely A point is thunderbolt point, and A point is L apart from the distance of monitoring point 1
1, A point is L apart from the distance of monitoring point 2
2, there is moment GPS information by lightning current and know that the time monitoring travelling wave current to monitoring point 1 and monitoring point 2 from thunderbolt point is respectively t
1, t
2, lightning wave velocity of propagation is in the line light velocity V, then can obtain thunderbolt point and be respectively apart from the distance of monitoring point 1 and the distance of thunderbolt point distance monitoring point 2:
(1)
(2)。
The above-mentioned division employing halving method carrying out transmission line of electricity section to be assessed according to shaft tower coordinate and numbering, section length=total line length/hop count.
Above-mentioned division employing process of iteration of carrying out transmission line of electricity section to be assessed according to shaft tower coordinate and numbering, first the hop count be divided into needed for transmission line of electricity is determined, then distance parameter is set, counting from first order shaft tower is the first section, if adjacent twice thunderbolt point range difference is less than distance parameter, is then judged to be same section, otherwise be different section, adjacent two different sections with shaft tower numbering the maximum between twice thunderbolt point for separation, the like, calculate sector number; The hop count be divided into needed for being greater than when segments result of calculation, then adjust distance parameter, finally, and the hop count be divided into needed for segments result of calculation equals.
The invention provides a kind of method of transmission line lightning stroke monitoring device and lightning protection proficiency assessment, for the Lightning Transformation instructing existing line, make lightning protection concentrate on circuit weak link, guarantee economy, effectively improve the Lightning performance of whole piece circuit; Effective lifting accident investigation efficiency, has ensured the safe and stable operation of transmission line of electricity, has improve the power supply reliability of electric system.
Accompanying drawing explanation
Fig. 1 is the transmission line lightning stroke monitoring device theory of constitution figure of embodiment one.
Fig. 2 is the transmission line of electricity thunderbolt point location schematic diagram of embodiment three.
Fig. 3 is the data collection host structural drawing of embodiment one.
Fig. 4 is the induction energy fetching power module schematic diagram of embodiment one.
Fig. 5 is the data acquisition extension set structural drawing of embodiment one.
Fig. 6 is the data acquisition extension set in-site installation schematic diagram of embodiment one.
Fig. 7 is data collection host and the extension set data interaction process flow diagram of embodiment one.
Fig. 8 is the lightning protection level evaluation method process flow diagram of embodiment two.
Fig. 9 is the transmission line of electricity thunderbolt Amplitude density schematic diagram of embodiment two.
Figure 10 is the transmission line of electricity section partition process flow diagram of embodiment four.
Figure 11 is the transmission line of electricity emergency stop valve trip Amplitude density schematic diagram of embodiment four.
Coding in accompanying drawing is respectively: 1 is data collection host, 2 is data acquisition extension set, 3 is server, 4 is Surveillance center, 301 is Sensor Measurement Unit, 302 is data processing unit, 303 is wireless communication unit, 304 is induction energy fetching power module, 401 is transmission line of alternation current power frequency load current, 402 is induction energy fetching iron core, 403 is induction energy fetching coil, 404 is overvoltage protection device, 405 is rectifier filer, 406 is DC/DC converter, 407 is controller, 408 is energy-storage module, 501 is data acquisition extension set Sensor Measurement Unit, 502 is data acquisition extension set data processing unit, 503 is wireless transport module, 504 is solar-electricity source module.
Embodiment
The present invention by the restriction of following embodiment, can not determine concrete embodiment according to technical scheme of the present invention and actual conditions.
In the present invention, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of upper and lower, left and right etc. determines according to the Butut direction of Figure of description.
Below in conjunction with embodiment and accompanying drawing, the invention will be further described:
Embodiment one: as shown in accompanying drawing 1,3,5,6, this transmission line lightning stroke monitoring device comprises the data collection host 1 be installed on transmission line of electricity three-phase conducting wire, the data acquisition extension set 2 be installed on electric power line pole tower, server 3 and Surveillance center 4; Communicated to connect by wireless transport module between data collection host 1 and data acquisition extension set 2, data collection host 1 is connected with the communication port radio communication of server 3, by real-time performance data communication between server 3 and control center 4; Described data collection host 1 comprises Sensor Measurement Unit 301, data processing unit 302 and wireless communication unit 303, the output terminal of Sensor Measurement Unit 301 is electrically connected by wire with the input end of data processing unit 302, and data processing unit 302 is connected with wireless communication unit 303 two-way communication; Described data acquisition extension set 2 comprises the data acquisition extension set Sensor Measurement Unit 501 be arranged on lightning conducter, data acquisition extension set data processing unit 502 and wireless transport module 503, the output terminal of data acquisition extension set Sensor Measurement Unit 501 is electrically connected by wire with the input end of data acquisition extension set data processing unit 502, and data acquisition extension set data processing unit 502 is connected with wireless transport module 503 two-way communication.In use, data collection host 1 is for gathering the lightning current flow through when transmission line of electricity is struck by lightning on transmission line of electricity, and carry out data interaction with data acquisition extension set 2, the lightning current information collected when receiving the thunderbolt lightning conducter of data acquisition extension set 2 transmission, then the lightning current information collected is uploaded to described server 3; Data acquisition extension set 2 flows through the lightning current on lightning conducter when lightning conducter is struck by lightning for gathering and carries out data interaction with data collection host 1, the lightning current information of collection is sent to server 3 by data collection host 1, server 3 is for the lightning current information that receives data collection host 1 and upload and carry out information analysis, Surveillance center 4 for by internet remote access server 3 to obtain the analysis result of server 3 pairs of power transmission line lightning shielding stream informations; Data collection host 1 is installed on the three-phase conducting wire that closes near electric power line pole tower, and data acquisition extension set 2 is installed on electric power line pole tower top; When transmission line of lightning strike three-phase conducting wire or lightning conducter, the gps time information of lightning current and correspondence is uploaded onto the server 3 by the mode of wireless transmission by data collection host 1.Server 3 receives the lightning current information that data collection host 1 is uploaded, and to lightning current data analysis and diagnosis, be specially: the both-end localization method utilizing theory of travelling wave, the lightning current wave graphic data uploaded according to thunderbolt thunderbolt point two ends data collection host 1 and corresponding gps time data, calculate thunderbolt point position, carry out trouble spot to the transmission line of electricity tripping fault caused because suffering to be struck by lightning accurately to locate, and carry out the lightning fault reason identification of shielding and counterattack according to lightning current waveform transient characteristic; Finally, according to diagnostic result, transmission line of electricity lightning protection level is assessed.The Sensor Measurement Unit 501 of data acquisition extension set 2 be installed on close on shaft tower position lightning conducter on, for gathering the lightning current flow through when lightning conducter is struck by lightning on lightning conducter; The agent structure of data acquisition extension set 2 is installed on electric power line pole tower, sensor signal extension line is connected along shaft tower with data acquisition extension set 2 agent structure, and the agent structure of data acquisition extension set 2 makes data acquisition extension set data processing unit 502, wireless transport module 503 is integrated in metal cabinet.Wireless transport module 503 also selects micropower wireless transport module, it possesses low in energy consumption, and data transmission credibility is high, is applicable to short range wireless transmission, carry out data interaction for same data collection host 1, send the lightning current of the thunderbolt lightning conducter of collection to server 3 by data collection host 1.
According to actual needs, above-mentioned transmission line lightning stroke monitoring device can be made further optimization and/or improvements:
As shown in accompanying drawing 1,3,5, Sensor Measurement Unit 301 comprises Luo-coil; Or/and described data processing unit 302 is single-chip microcomputer or dsp chip.Sensor Measurement Unit 301 is mainly used in measuring the three-phase lightning current on transmission line of electricity, because amplitude of lightning current is comparatively large, therefore adopts Luo-coil to measure.Luo-coil can adopt open type or flexible back bone type, so that install on transmission line wire.Because Luo-coil response band is wider, power transmission line power frequency load current can be sensed, therefore usually add the Hz noise component of a high-pass filtering circuit for filtering 50Hz at Luo-coil output terminal.The Sensor Measurement Unit 501 of data acquisition extension set, compared with the Sensor Measurement Unit 301 of data collection host 1, because lightning conducter does not have power frequency load current, does not therefore add high-pass filtering circuit at the output terminal of Luo-coil.Data processing unit 302 carries out data sampling and processing, storage for the lightning current waveform information exported Sensor Measurement Unit 301, and sends to wireless communication unit 303 by serial line interface.
As shown in accompanying drawing 1,3,4,5,7, wireless communication unit 303 comprises GPRSDTU module and wireless transport module, data collection host 1 sends communication data or received communication data by GPRSDTU module to server 3, and wireless transport module is used for carrying out data interaction with data acquisition extension set 2.In use, wireless transport module selects micropower wireless transport module, and sighting distance is reliable, transmission range is 800m, adopts the modulation system of GFSK, the optional 433MHz ~ 915MHz of carrier frequency or ISM band, power consumption is less than 100mW, for carrying out data interaction with data acquisition extension set 2.
As accompanying drawing 1, 3, 4, shown in 7, this data collection host also comprises induction energy fetching power module 304, induction energy fetching power module 304 comprises electromagnetic induction device, overvoltage protection device 404, rectifier filer 405, DC/DC converter 406, controller 407 and energy-storage module 408, power for giving data collection host 1 and charge to energy-storage module 408, the output terminal of electromagnetic induction device is electrically connected by wire with the input end of overvoltage protection device 404, the output terminal of overvoltage protection device 404 is electrically connected by wire with the input end of rectifier filer 405, the output terminal of rectifier filer 405 is electrically connected by wire with the input end of DC/DC converter 406, the output terminal of DC/DC converter 406 is electrically connected by wire with the input end of controller 407, the output terminal of controller 407 is electrically connected by wire with the input end of energy-storage module 408 and data collection host 1 respectively, or/and, data acquisition extension set 2 also comprises solar-electricity source module 504, and the output terminal of solar-electricity source module 504 is electrically connected by wire with the input end of data acquisition extension set Sensor Measurement Unit 501, the input end of data acquisition extension set data processing unit 502 and the input end of wireless transport module 503 respectively.In actual use, electromagnetic induction device comprises transmission line of alternation current power frequency load current 401, induction energy fetching iron core 402 and induction energy fetching coil 403, transmission line of alternation current power frequency load current 401 can produce the electromagnetic field of alternation, magnetic field energy around transmission line of alternation current is converted to electric energy according to electromagnetic induction principle by induction energy fetching iron core 402, the alternating voltage that induction energy fetching coil 403 exports is through overvoltage protection device 404, rectifier filer 405, DC/DC converter 406, output voltage is converted to data collection host 1 to work required voltage, the discharge and recharge of accumulator or lithium battery energy storage battery module 408 is responsible for by controller 407, and connection data gathers main frame 1 power supply passage, when induction energy fetching exports energy abundance, powered by induction energy fetching coil channel, when transmission line of electricity has a power failure, powered for data collection host 1 by battery energy storage module 408.The solar panel of solar-electricity source module 504 is installed on shaft tower top, when abundance at sunshine, can provide electric energy by solar-electricity source module 504 to each unit of data acquisition extension set 2; When solar-electricity source module electricity deficiency, powered to each unit by the accumulator arranged in data acquisition extension set or lithium battery energy storage battery module.
Embodiment two: as shown in accompanying drawing 1,8,9,10,11, this lightning protection level evaluation method comprises the following steps:
Step one: server based on data gathers the latitude and longitude information of main frame mounting points, and the weather information of Real-time Obtaining locality, sends to described data collection host; Data collection host, according to the weather information received, selects the mode of operation of described data acquisition extension set, according to local future weather, if thunderstorm weather, then sends and wakes instruction up, enter step 2 afterwards; If local future weather is non-thunderstorm weather, then sends dormancy instruction, enter step 3 afterwards;
Step 2: data acquisition extension set receives and wakes mode of operation steering order up, namely select to wake mode of operation up, open thunderbolt lightning conducter lightning current high speed acquisition passage and analyzing and processing is carried out to image data, lightning current data after process are sent to data collection host by wireless transport module, enters step 4 afterwards;
Step 3: data acquisition extension set receives dormancy mode of operation steering order, namely selects dormancy mode of operation, closes thunderbolt lightning conducter lightning current high speed acquisition passage; In dormancy mode of operation, to set up with data collection host every 30 seconds and be once connected, receive mode of operation control information next time, wake mode of operation steering order up when receiving, then enter step 2; When receiving dormancy mode of operation steering order, then circulation performs step 3;
Step 4: the time period of specifying transmission line of electricity lightning protection proficiency assessment, the shielding counterattack type of each transmission line of lightning strike, thunderbolt shaft tower, the amplitude of lightning current of thunderbolt lightning conducter, thunderbolt point and lightning strike accident tripping operation is obtained in this time period from server, statistics causes the amplitude of lightning current of transmission line of electricity emergency stop valve trip, thunderbolt point and type of being struck by lightning, and enters step 5 afterwards;
Step 5: set up two-dimensional coordinate system according to transmission line of electricity overhead line structures coordinate to be assessed, numbering and amplitude of lightning current, draw transmission line of electricity thunderbolt Amplitude density figure, divide section, calculate the lightning strike density of each section at the appointed time in section and thunderbolt intensity, draw and easily hit section;
Lightning strike density:
Thunderbolt intensity:
In formula:
thunderbolt number of times in-the i-th section;
-
ithe line length of individual section, unit kilometer;
-specify evaluation time section, unit year;
-circuit to be assessed divides section complete cross section number;
thunderbolt total degree in-the i-th section;
-kth time amplitude of lightning current maximal value, unit kA;
Wherein, lightning strike density characterizes the probability that this section is struck by lightning, and unit is time/Gong Li ˙, and thunderbolt intensity characterizes the size that this section institute suffers thunderbolt intensity, and unit is kA/ Gong Li ˙, enters step 6 afterwards;
Step 6: set up two-dimensional coordinate system according to transmission line tower coordinate to be assessed, numbering and amplitude of lightning current, according to the section that step 5 divides, draw transmission line of electricity emergency stop valve trip Amplitude density figure, calculate the thunderbolt shielding failure rate of each section at the appointed time in section, counterattack failure rate and total lightning fault rate, draw and easily dodge section; Wherein, the shielding failure rate=shielding number of stoppages/thunderbolt number of times, the counterattack failure rate=counterattack number of stoppages/thunderbolt number of times, total lightning fault rate equal shielding failure rate and counterattack failure rate sum, enter step 7 afterwards;
Step 7: according to each section of step 6 total lightning fault rate result of calculation, grade classification is carried out to transmission line of electricity to be assessed each section lightning protection level.
In use, when carrying out the collection of lightning current data high frequency, system power dissipation is higher, and solar-electricity source module battery life used is relevant with discharge and recharge number of times, data acquisition extension set 2 adopts selects whether carry out lightning current collection according to thunderstorm meteorologic parameter, effectively can extend battery, improve the reliability of data acquisition extension set 2 system works.
Embodiment three: the invention provides transmission line of electricity thunderbolt independent positioning method, as shown in Figure 2, if the burst length between two monitoring points is L, when transmission line of lightning strike occurs in the A point between two monitoring points, namely A point is thunderbolt point, and A point is L apart from the distance of monitoring point 1
1, A point is L apart from the distance of monitoring point 2
2, there is moment GPS information by lightning current and know that the time monitoring travelling wave current to monitoring point 1 and monitoring point 2 from thunderbolt point is respectively t
1, t
2, lightning wave velocity of propagation is in the line light velocity V, then, can obtain thunderbolt point and be respectively apart from the distance of monitoring point 1 and the distance of thunderbolt point distance monitoring point 2:
(1)
(2)。
Surveillance center 4 is connected by internet and server 3, and operational management unit can pass through Surveillance center 4 remote access server 3, thus can obtain the relevant information such as transmission line lightning stroke position of failure point, lightning protection proficiency assessment result.
Embodiment four: the invention provides transmission line of electricity section partition method:
As shown in accompanying drawing 1,9,10,11, the division methods of carrying out transmission line of electricity section to be assessed according to shaft tower coordinate and numbering adopts halving method, section length=total line length/hop count.
As shown in accompanying drawing 1,9,10,11, the division methods of carrying out transmission line of electricity section to be assessed according to shaft tower coordinate and numbering adopts process of iteration, first the hop count be divided into needed for transmission line of electricity is determined, then distance parameter is set, counting from first order shaft tower is the first section, if adjacent twice thunderbolt point range difference is less than distance parameter, then be judged to be same section, otherwise be different section, adjacent two different sections with shaft tower numbering the maximum between twice thunderbolt point for separation, the like, calculate sector number; The hop count be divided into needed for being greater than when segments result of calculation, then adjust distance parameter, finally, and the hop count be divided into needed for segments result of calculation equals.In use, first the hop count M be divided into needed for transmission line of electricity is determined, distance parameter D is then set, counting from first order shaft tower is the first section, if adjacent twice thunderbolt point range difference is less than distance parameter D, is then judged to be same section, otherwise be different section, adjacent two different sections with shaft tower numbering the maximum between twice thunderbolt point for separation, the like, calculate segments; As the hop count M be divided into needed for segments result of calculation section is greater than, then adjust distance D, till finally making segments result of calculation equal with the required hop count M be divided into; Finally, two-dimensional coordinate system is set up according to transmission line of electricity overhead line structures coordinate to be assessed, numbering and amplitude of lightning current, according to the section of above-mentioned division, draw transmission line of electricity emergency stop valve trip Amplitude density figure, calculate the thunderbolt shielding failure rate of each section at the appointed time in section, counterattack failure rate and total lightning fault rate, draw and easily hit section.
Emergency stop valve trip Amplitude density figure can reflect the probability that can have an accident after each section is struck by lightning, and further illustrates the height of lightning protection level.Shielding failure rate=shielding the number of stoppages/thunderbolt number of times, the counterattack failure rate=counterattack number of stoppages/thunderbolt number of times, total lightning fault rate equal shielding failure rate and counterattack failure rate sum.Shielding failure rate and counterattack failure rate can facilitate operational management unit for different lightning fault types, analyze culprit, thus formulate effective lightning protection measures.
Above technical characteristic constitutes embodiments of the invention, and it has stronger adaptability and implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (9)
1. a transmission line lightning stroke monitoring device, is characterized in that comprising the data collection host be installed on transmission line of electricity three-phase conducting wire, the data acquisition extension set be installed on electric power line pole tower, server and Surveillance center; Communicated to connect by wireless transport module between data collection host and data acquisition extension set, data collection host is connected with the communication port radio communication of server, by real-time performance data communication between server and control center; Described data collection host comprises Sensor Measurement Unit, data processing unit and wireless communication unit, the output terminal of Sensor Measurement Unit is electrically connected by wire with the input end of data processing unit, and data processing unit is connected with wireless communication unit two-way communication; Described data acquisition extension set comprises the data acquisition extension set Sensor Measurement Unit, data acquisition extension set data processing unit and the wireless transport module that are arranged on lightning conducter, the output terminal of data acquisition extension set Sensor Measurement Unit is electrically connected by wire with the input end of data acquisition extension set data processing unit, and data acquisition extension set data processing unit is connected with wireless transport module two-way communication.
2. transmission line lightning stroke monitoring device according to claim 1, is characterized in that described Sensor Measurement Unit comprises Luo-coil; Or/and described data processing unit is single-chip microcomputer or dsp chip.
3. transmission line lightning stroke monitoring device according to claim 1 and 2, is characterized in that wireless communication unit comprises GPRSDTU module and wireless transport module.
4. transmission line lightning stroke monitoring device according to claim 1 and 2, it is characterized in that data collection host also comprises induction energy fetching power module, described induction energy fetching power module comprises electromagnetic induction device, overvoltage protection device, rectifier filer, DC/DC converter, controller and energy-storage module, for powering to data collection host and charging to energy-storage module, the output terminal of electromagnetic induction device is electrically connected by wire with the input end of overvoltage protection device, the output terminal of overvoltage protection device is electrically connected by wire with the input end of rectifier filer, the output terminal of rectifier filer is electrically connected by wire with the input end of DC/DC converter, the output terminal of DC/DC converter is electrically connected by wire with the input end of controller, the output terminal of controller is electrically connected by wire with the input end of energy-storage module and data collection host respectively, or/and, data acquisition extension set also comprises solar-electricity source module, and the output terminal of solar-electricity source module is electrically connected by wire with the input end of data acquisition extension set Sensor Measurement Unit, the input end of data acquisition extension set data processing unit and the input end of wireless transport module respectively.
5. transmission line lightning stroke monitoring device according to claim 3, it is characterized in that data collection host also comprises induction energy fetching power module, described induction energy fetching power module comprises electromagnetic induction device, overvoltage protection device, rectifier filer, DC/DC converter, controller and energy-storage module, for powering to data collection host and charging to energy-storage module, the output terminal of electromagnetic induction device is electrically connected by wire with the input end of overvoltage protection device, the output terminal of overvoltage protection device is electrically connected by wire with the input end of rectifier filer, the output terminal of rectifier filer is electrically connected by wire with the input end of DC/DC converter, the output terminal of DC/DC converter is electrically connected by wire with the input end of controller, the output terminal of controller is electrically connected by wire with the input end of energy-storage module and data collection host respectively, or/and, data acquisition extension set also comprises solar-electricity source module, and the output terminal of solar-electricity source module is electrically connected by wire with the input end of data acquisition extension set Sensor Measurement Unit, the input end of data acquisition extension set data processing unit and the input end of wireless transport module respectively.
6. use a method for the lightning protection proficiency assessment of transmission line lightning stroke monitoring device described in any one of claim 1 to 5, it is characterized in that comprising the following steps:
Step one: server based on data gathers the latitude and longitude information of main frame mounting points, and the weather information of Real-time Obtaining locality, sends to described data collection host; Data collection host, according to the weather information received, selects the mode of operation of described data acquisition extension set, according to local future weather, if thunderstorm weather, then sends and wakes instruction up, enter step 2 afterwards; If local future weather is non-thunderstorm weather, then sends dormancy instruction, enter step 3 afterwards;
Step 2: data acquisition extension set receives and wakes mode of operation steering order up, namely select to wake mode of operation up, open thunderbolt lightning conducter lightning current high speed acquisition passage and analyzing and processing is carried out to image data, lightning current data after process are sent to data collection host by wireless transport module, enters step 4 afterwards;
Step 3: data acquisition extension set receives dormancy mode of operation steering order, namely selects dormancy mode of operation, closes thunderbolt lightning conducter lightning current high speed acquisition passage; In dormancy mode of operation, to set up with data collection host every 30 seconds and be once connected, receive mode of operation control information next time, wake mode of operation steering order up when receiving, then enter step 2; When receiving dormancy mode of operation steering order, then continue to perform step 3;
Step 4: the time period of specifying transmission line of electricity lightning protection proficiency assessment, the shielding counterattack type of each transmission line of lightning strike, thunderbolt shaft tower, the amplitude of lightning current of thunderbolt lightning conducter, thunderbolt point and lightning strike accident tripping operation is obtained in this time period from server, statistics causes the amplitude of lightning current of transmission line of electricity emergency stop valve trip, thunderbolt point and type of being struck by lightning, and enters step 5 afterwards;
Step 5: set up two-dimensional coordinate system according to transmission line of electricity overhead line structures coordinate to be assessed, numbering and amplitude of lightning current, draw transmission line of electricity thunderbolt Amplitude density figure, divide section, calculate the lightning strike density of each section at the appointed time in section and thunderbolt intensity, draw and easily hit section;
Lightning strike density:
Thunderbolt intensity:
In formula:
thunderbolt number of times in-the i-th section;
-
ithe line length of individual section, unit kilometer;
-specify evaluation time section, unit year;
-circuit to be assessed divides section complete cross section number;
thunderbolt total degree in-the i-th section;
-kth time amplitude of lightning current maximal value, unit kA;
Wherein, lightning strike density characterizes the probability that this section is struck by lightning, and unit is time/Gong Li ˙, and thunderbolt intensity characterizes the size that this section institute suffers thunderbolt intensity, and unit is kA/ Gong Li ˙, enters step 6 afterwards;
Step 6: set up two-dimensional coordinate system according to transmission line tower coordinate to be assessed, numbering and amplitude of lightning current, according to the section that step 5 divides, draw transmission line of electricity emergency stop valve trip Amplitude density figure, calculate the thunderbolt shielding failure rate of each section at the appointed time in section, counterattack failure rate and total lightning fault rate, draw and easily dodge section; Wherein, the shielding failure rate=shielding number of stoppages/thunderbolt number of times, the counterattack failure rate=counterattack number of stoppages/thunderbolt number of times, total lightning fault rate equal shielding failure rate and counterattack failure rate sum, enter step 7 afterwards;
Step 7: according to each section of step 6 total lightning fault rate result of calculation, grade classification is carried out to transmission line of electricity to be assessed each section lightning protection level.
7. the appraisal procedure of lightning protection level according to claim 6, it is characterized in that the method for transmission line of electricity thunderbolt point location sets burst length between two monitoring points as L, when transmission line of lightning strike occurs in the A point between two monitoring points, namely A point is thunderbolt point, and A point is L apart from the distance of monitoring point 1
1, A point is L apart from the distance of monitoring point 2
2, there is moment GPS information by lightning current and know that the time monitoring travelling wave current to monitoring point 1 and monitoring point 2 from thunderbolt point is respectively t
1, t
2, lightning wave velocity of propagation is in the line light velocity V, then can obtain thunderbolt point and be respectively apart from the distance of monitoring point 1 and the distance of thunderbolt point distance monitoring point 2:
(1)
(2)。
8. the method for lightning protection proficiency assessment according to claim 6 or 7, is characterized in that the division carrying out transmission line of electricity section to be assessed according to shaft tower coordinate and numbering adopts halving method, section length=total line length/hop count.
9. the method for lightning protection proficiency assessment according to claim 6 or 7, is characterized in that the division carrying out transmission line of electricity section to be assessed according to shaft tower coordinate and numbering adopts process of iteration; First the hop count be divided into needed for transmission line of electricity is determined, then distance parameter is set, counting from first order shaft tower is the first section, if adjacent twice thunderbolt point range difference is less than distance parameter, then be judged to be same section, otherwise be different section, adjacent two different sections with shaft tower numbering the maximum between twice thunderbolt point for separation, the like, calculate sector number; The hop count be divided into needed for being greater than when segments result of calculation, then adjust distance parameter, finally, and the hop count be divided into needed for segments result of calculation equals.
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