CN104698278B - A kind of alternating current circuit alternating-current lightning arrestor electrification detection system and method - Google Patents
A kind of alternating current circuit alternating-current lightning arrestor electrification detection system and method Download PDFInfo
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- CN104698278B CN104698278B CN201510087628.4A CN201510087628A CN104698278B CN 104698278 B CN104698278 B CN 104698278B CN 201510087628 A CN201510087628 A CN 201510087628A CN 104698278 B CN104698278 B CN 104698278B
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Abstract
The invention discloses a kind of alternating current circuit alternating-current lightning arrestor electrification detection system, it includes high voltage AC bus, shaft tower, alternating-current lightning arrestor, bus-bar potential transformer, current sample module, voltage sample module, alternating current circuit resistance measuring module, busbar current transformer and processing module, processing module receives current sample module, voltage sample module passes through alternating-current lightning arrestor respectively, bus-bar potential transformer, the current data sequence of busbar current transformer extraction, the AC line current value of voltage data sequence and bus current data sequence and alternating current circuit resistance measuring module is simultaneously calculated them, to judge the reliability of alternating-current lightning arrestor.The invention also discloses a kind of method that reliability detection is carried out using above-mentioned electrification detection system.The adverse effect of the factor to alternating-current lightning arrestor such as made moist The present invention reduces aging, improve the security of AC system operation.
Description
Technical field
The present invention relates to AC system detection technique field, and in particular to a kind of online inspection of alternating current circuit alternating-current lightning arrestor
Examining system and the method that reliability detection is carried out using the system.
Background technology
With the rapid development of Chinese society's economy and the continuous progress of science and technology, entire society is increasing to the demand of electric energy,
Therefore power network scale constantly expands.But serious asymmetric problem be present in Chinese energy distribution and economic development, east and
The economically developed energy in south is few, and Western Energy Resources are abundant but economy relatively falls behind, thus Western Energy Resources are effectively transported to east and
South, contribute to the sustainable development of national economy.High voltage UHV AC transmission technique advantage in short distance power Transmission because of it
Substantially, put into operation in the big existing a plurality of super ultra-high voltage AC transmission systems of 10kV~1000kV on the ground of China.
In order to improve transmission line of electricity operational reliability, particularly super (spy) high pressure to the safe and stable operation of whole power network extremely
Close important.To from 1980, foreign countries propose installs leakage conductor to reduce line tripping accident, the U.S. on transmission line of electricity
Successively successfully leakage conductor is applied on transmission line of electricity with Japanese, the country is also largely installing and using in recent years.However,
Alternating current circuit arrester is installed among transmission line of electricity, and the supply due to a lack of maintenance power supply can not carry out the year preventative examination of prevention
The working condition for judging AC line arrester is tested, also the live monitoring of alternating-current lightning arrestor is not carried out by the method for on-line monitoring
And on-line monitoring, the at present judgement to alternating current circuit arrester state can only carry out 1mA canonical references by self-powered device
The measurement of voltage and the leakage current under 0.75 reference voltage, but current method instrument is heavy, and transmission line of electricity passes through high mountain more
Area, blackouts monitoring method is difficult big at present or can not implement.Therefore, a kind of alternating current circuit arrester on-line checking system is developed
System, the impedance threshold of alternating current circuit arrester can be determined in real time, have to the safe and stable operation of AC electric power systems important
Meaning, have important technical support to power supply guarantee, while bring great economic benefit.
The content of the invention
It is an object of the invention to for above-mentioned alternating current circuit arrester feature, there is provided a kind of stability is good, reliability is high
Alternating current circuit arrester on-line detecting system and using the system carry out reliability detection method, for determining that exchange is kept away
The running status of thunder device.
To realize object above, this invention takes following technical scheme：
A kind of alternating current circuit alternating-current lightning arrestor electrification detection system, it includes：
High voltage AC bus, for producing ac voltage signal；
Wire is exchanged, for connecting high voltage AC bus and shaft tower, realizes electrical energy transportation；
Shaft tower, for carrying out base support to exchange wire；
Bus-bar potential transformer, primary side and the high voltage AC bus of the bus-bar potential transformer are electrically connected with, are used for
The ac voltage signal is converted, the alternating voltage output signal after the secondary side of bus-bar potential transformer produces a conversion；
Alternating-current lightning arrestor, the shaft tower side being installed on, the primary side of the alternating-current lightning arrestor is electrically connected with exchanging wire,
Current signal measurement point is formed, after the ac voltage signal flows through alternating-current lightning arrestor by exchanging wire, in alternating-current lightning arrestor
Ground side produce an ac current signal；
Voltage sample module, the input of the voltage sample module and the secondary side of bus-bar potential transformer electrically connect
Connect, for carrying out multiple repairing weld to the alternating voltage output signal, obtain the voltage data sequence of sampling；
Current sample module, the input of the current sample module and the earth-return circuit of alternating-current lightning arrestor are electrically connected with,
For carrying out multiple repairing weld to the ac current signal, obtain the current data sequence of sampling, the current data sequence and
The quantity of voltage data sequence is equal；
Conductor impedance parameters measurement module is exchanged, for measuring the current vector and voltage vector of exchange wire, to obtain
Exchange the impedance parameter of wire；
Busbar current transformer, primary side and the high voltage AC bus of the busbar current transformer are electrically connected with, are used for
A bus current signal is produced in the secondary side of busbar current transformer；
Processing module, for receiving the current data sequence, voltage data sequence, the current vector and electricity for exchanging wire
The amount of pressing to and bus current signal are simultaneously calculated it, to judge the reliability of alternating-current lightning arrestor.
The current sample module includes the first current sensor, the first a/d conversion device, the first central processing unit and the
One wireless transceiver terminal, the sampling probe of first current sensor are serially connected in the earth-return circuit of alternating-current lightning arrestor, institute
The output end for stating the first current sensor is connected by the first a/d conversion device with the input of the first central processing unit, for inciting somebody to action
The current data sequence that first current sensor carries out multiple repairing weld acquisition to the ac current signal passes after analog-to-digital conversion
The first central processing unit is delivered to, the input of the output end of first central processing unit and the first wireless transceiver terminal is electrical
Connection, processing mould is sent to for the current data sequence after the analog-to-digital conversion by acquisition by the first wireless transceiver terminal
Block.
The voltage sample module includes voltage sensor, the second a/d conversion device, the second central processing unit and the second nothing
Line transceiver terminal, the sampling probe of the voltage sensor are serially connected in the secondary side of bus-bar potential transformer, the voltage
The output end of sensor is connected by the second a/d conversion device with the input of the second central processing unit, for by voltage sensor
The voltage data sequence that multiple repairing weld acquisition is carried out to the alternating voltage output signal is sent in second after analog-to-digital conversion
Central processor, the input of the output end of second central processing unit and the second wireless transceiver terminal are electrically connected with, are used for
Voltage data sequence after the analog-to-digital conversion of acquisition is sent to processing module by the second wireless transceiver terminal.
The exchange wire includes A phase conductors, B phase conductors and C phase conductors, wherein, A phase conductors, B phase conductors are led with C phases
The disconnected chalaza that line is formed with high voltage AC bus respectively is designated as D points, E points and F points respectively, the primary side of the alternating-current lightning arrestor with
Exchange X points, Y points and Z points that the current signal measurement point that wire is formed is located on A phase conductors, B phase conductors and C phase conductors respectively；
Be respectively equipped with disconnected conjunction between the A phase conductors, B phase conductors and C phase conductors and high voltage AC bus switch K1, switch K2 and
K3 is switched, exchanging between the X points, Y points and Z points and shaft tower is respectively equipped with switch K4, switch K5 and switch K6 on wire.
The exchange conductor impedance parameters measurement module includes measurement power supply, current measuring device, voltage measuring apparatus, connect
Ground device, the 3rd a/d conversion device, the 3rd wireless transceiver terminal；Wherein, the three-phase output end for measuring power supply passes through three couplings
Line is respectively connecting to D points, E points and F points, and current measuring device and voltage measuring apparatus are connected with three phase terminal；It is described
The one end of earthing or grounding means including switch K7, switch K8, switch K9 and K10, the switch K9, switch K8, switch K7 connects respectively
To X points, Y points and Z points, the other end of three is by switching K10 ground connection；The current measuring device and voltage measuring apparatus
The two is measured current vector and voltage by output end respectively by the 3rd a/d conversion device via the 3rd wireless transceiver terminal
Vector is sent to processing module.
The processing module includes：
Wireless transceiver master station, the input of the wireless transceiver master station respectively with the first wireless transceiver terminal,
The output end wireless connection of two wireless transceiver terminals and the 3rd wireless transceiver terminal, the output of the wireless transceiver master station
End be connected with server, for establishing between current sample module and server, between voltage sample module and server and
Exchange the communication between conductor impedance parameters measurement module and server；
Server, for receiving the current data sequence from wireless transceiver master station, voltage data sequence, exchange wire
Current vector and voltage vector and bus current signal, and pass through calculate judge alternating-current lightning arrestor reliability.
The wireless transceiver master station, the first wireless transceiver terminal, the second wireless transceiver terminal and the 3rd are wireless to receive
It is wireless router to send out device terminal.
The secondary side of the busbar current transformer is connected to the input of one second current sensor, the second current sense
After the output end of device carries out analog-to-digital conversion by one the 4th a/d conversion device, by one the 4th central processing unit by the bus current
Signal is sent to processing module by the 4th wireless transceiver terminal.
A kind of alternating current circuit alternating-current lightning arrestor live detection method, it comprises the following steps：
Step 1, the survey by exchanging conductor impedance parameters measurement module progress AC line voltage vector sum current vector
Amount, and exchange conductor impedance parameter is calculated, the exchange conductor impedance parameter is high voltage AC bus and current signal measurement point
Between alternating current circuit impedance parameter；The current signal measurement point is that the primary side of the alternating-current lightning arrestor positioned at shaft tower side connects
The contact being connected on alternating current circuit；The exchange wire includes A phase conductors, B phase conductors and C phase conductors, wherein, A phase conductors, B
The disconnected chalaza that phase conductor and C phase conductors are formed with high voltage AC bus respectively is designated as D points, E points and F points, alternating-current lightning arrestor respectively
Primary side with exchanging the current signal measurement point of the wire formation X on A phase conductors, B phase conductors and the C phase conductors respectively
Point, Y points and Z points；It is respectively equipped with out at disconnected conjunction between the A phase conductors, B phase conductors and C phase conductors and high voltage AC bus
K1, switch K2 and switch K3 are closed, exchanging between the X points, Y points and Z points and shaft tower is respectively equipped with switch K4, switch on wire
K5 and switch K6；The exchange conductor impedance parameters measurement module includes measurement power supply, current measuring device, voltage measurement dress
Put, earthing or grounding means；Wherein, the three-phase output end for measuring power supply is respectively connecting to D points, E points and F points by three phase terminals, described
Current measuring device and voltage measuring apparatus are connected with three phase terminals；The earthing or grounding means includes switch K7, switch K8, switch
K9 and K10, the switch K9, switch K8, switch K7 one end are respectively connecting to X points, Y points and Z points, and the other end of three is logical
Cross switch K10 ground connection；
The step 1 comprises the following steps：
Step 11, switch K1, K2, K3, K4, K5, K6, K7, K8, K9 and K10 are disconnected, electricity is obtained by current measuring device
Flow vectorVoltage vector is obtained by voltage measuring apparatusNow impedance Z is calculated according to formula (1)1：
Step 12, switch K1, K2, K3, K4, K5 and K6 are disconnected, closure switch K7, K8, K9 and K10, pass through current measurement
Device obtains current vectorVoltage vector is obtained by voltage measuring apparatusNow impedance Z is calculated according to formula (2)0：
Step 2, alternating current is taken to believe from the earth-return circuit of alternating-current lightning arrestor the sampling probe of the first current sensor
Number, after analog-to-digital conversion, form current data sequence I (k)；By the sampling probe of voltage sensor from bus-bar potential transformer
Secondary side takes alternating voltage output signal, after analog-to-digital conversion, forms voltage data sequence U (k)；By the second current sense
The sampling probe of device takes bus ac current signal from busbar current transformer secondary side, after analog-to-digital conversion, is formed female
Line current data sequence I1(k)；The sampling probe and voltage of the sampling probe of first current sensor, the second current sensor
The sample frequency of the sampling probe of sensor is 500Hz, and the sampling number of three is 500, wherein, k value is 0,1,
2…499；
Step 3, by formula (3)-(5), respectively to the current data sequence I (k), voltage data sequence U (k), bus
Current data sequence I1(k) arrange respectively, form new current data sequence I0(k), voltage data sequence U0(k) and bus is electric
Flow data sequence
Voltage data sequence U in step 4, formula (4)0(k) for high voltage AC bus side magnitude of voltage, it is necessary to be converted into bar
The alternating current circuit arrester magnitude of voltage of tower side, shown in reduction formula such as formula (6)：
In formula (6), sinh is hyperbolic sine function, coth-1For the inverse function of hyperbolic cosine；
Step 5, based on formula (2)-(6), extract 50Hz, 100Hz, 150Hz, 200Hz, the 250Hz of alternating-current lightning arrestor,
300Hz, 350Hz, 400Hz, 450Hz impedance value and angle, respectively as shown in formula (7) and formula (8)：
In formula (7) and formula (8), l takes 50,100,150,200,250,300,350,400 and 450Hz respectively；
Step 6, the reliability for judging alternating-current lightning arrestor, the method for judgement：
When meeting following condition for the moment, have a power failure the replacing alternating-current lightning arrestor：
50Hz current value I0(50) it is more than 50mA；
The 50Hz of alternating-current lightning arrestor impedance value Z between adjacent live detection twice50Rate of change be more than 100%；
When meeting following condition for the moment, cycle of the adjacent secondary live detection of reduction alternating-current lightning arrestor is to strengthen monitoring：
The 50Hz of alternating-current lightning arrestor impedance value Z between adjacent live detection twice50Rate of change be more than and 50% and be less than
70%；
Between adjacent live detection twice 50Hz, 100Hz, 150Hz, 200Hz, 250Hz, 300Hz, 350Hz, 400Hz and
The change of 450Hz angle is all higher than 10 °.
If the 50Hz of alternating-current lightning arrestor, 100Hz, 150Hz, 200Hz, 250Hz, 300Hz, 350Hz, 400Hz, 450Hz
Impedance value and angle for measure first when, then only consider 50Hz current value I0(50) whether it is more than 50mA.
The present invention compared with prior art, has the following advantages that：The present invention compared with prior art, has the following advantages that：
The present invention is using alternating current circuit arrester as subjects, with high voltage AC bus, bus-bar potential transformer, current sensor, electricity
Pressure sensor, a/d conversion device, central processing unit, wireless transceiver terminal, wireless transceiver master station and server are hardware bar
Part, the current sequence signal in arrester ground loop and voltage sampling apparatus is taken to take busbar voltage by current sampling device
Sequence signal, 50Hz, 100Hz, 150Hz, the 200Hz of server progress alternating-current lightning arrestor are sent to after processing by wireless telecommunications,
250Hz, 300Hz, 350Hz, 400Hz, 450Hz impedance value and angle, judge the running status of alternating-current lightning arrestor.So as to ensure
Effective protective effect of alternating-current lightning arrestor, there is the characteristics of directly perceived, quick, safety etc. are advanced, reduce aging and the factor such as make moist
To the adverse effect of alternating-current lightning arrestor.
Brief description of the drawings
Fig. 1 is a kind of structure principle chart of alternating current circuit alternating-current lightning arrestor electrification detection system of the present invention；
Fig. 2 is the circuit theory diagrams of exchange conductor impedance parameters measurement module；
Fig. 3 is the schematic diagram of measuring state in Fig. 2.
Wherein：1st, high voltage AC bus；2nd, shaft tower；3rd, bus-bar potential transformer；4th, alternating-current lightning arrestor；5th, voltage sample mould
Block；51st, voltage sensor；52nd, the second a/d conversion device；53rd, the second central processing unit；54th, the second wireless transceiver terminal；6、
Current sample module；61st, the first current sensor；62nd, the first a/d conversion device；63rd, the first central processing unit；64th, the first nothing
Line transceiver terminal；7th, conductor impedance parameters measurement module is exchanged；71st, wire is exchanged；72nd, power supply is measured；73rd, current measurement fills
Put；74th, voltage measuring apparatus；75th, earthing or grounding means；76th, the 3rd a/d conversion device；77th, the 3rd wireless transceiver terminal；8th, it is wireless
Transceiver master station；9th, server；10th, busbar current transformer；101st, the second current sensor；102nd, the 4th a/d conversion device；
103rd, the 4th central processing unit；104th, the 4th wireless transceiver terminal.
Embodiment
Present disclosure is described in further details with reference to the accompanying drawings and detailed description.
Embodiment：
It refer to shown in Fig. 1, a kind of alternating current circuit alternating-current lightning arrestor electrification detection system, suitable for the property of leakage conductor
It can test, to prevent it from breaking down in use.The electrification detection system includes：For providing ac voltage signal to divide
The high voltage AC bus 1 of analysis, the alternating-current lightning arrestor of connection are used to provide the shaft tower 2 of ac current signal, for converting alternating current
Pressure takes the bus-bar potential transformer 3 of data so as to voltage sensor 51, the ac current signal of arrester is flowed through for providing
The alternating-current lightning arrestor 4 analyzed with doing, for take voltage transformer secondary side (for current transformer, voltage transformer and
For alternating-current lightning arrestor, in the present invention, primary side refers both to first winding side i.e. high-pressure side, and secondary side refers both to secondary winding side i.e.
Low-pressure side) ac voltage signal and be AD converted processing etc. voltage sample module 5, for taking alternating-current lightning arrestor 4 to connect
The current signal of ground side is simultaneously AD converted the current sample module 6 of processing, for measuring from voltage signal measurement point and electric current
The exchange conductor impedance parameters measurement module 7 of alternating current circuit resistance between signal measurement point；One end respectively with voltage sample mould
Block 5, current sample module 6 are connected, and the other end is connected with server 9, for realizing between voltage sample module 5 and server 9,
Between current sample module 6 and server 9, between busbar current transformer 10 and server 9 and exchange conductor impedance parameter
Measurement module 7 and the wireless transceiver master station 8 of the communication of server 9, receive what is come for handling from wireless transceiver master station 8
Voltage x current data-signal simultaneously carries out the corresponding server 9 for calculating processing.
Current sample module 6 includes the first current sensor 61, the first a/d conversion device 62, the and of the first central processing unit 63
First wireless transceiver terminal 64, the sampling probe of the first current sensor 61 are serially connected in the earth-return circuit of alternating-current lightning arrestor 4,
The output end of first current sensor 61 is connected by the first a/d conversion device 62 with the input of the first central processing unit 63, is used
In by the first current sensor 61 to ac current signal carry out multiple repairing weld acquisition current data sequence after analog-to-digital conversion
It is sent to the first central processing unit 63, the input of the output end of the first central processing unit 63 and the first wireless transceiver terminal 64
It is electrically connected with, place is sent to by the first wireless transceiver terminal 64 for the current data sequence after the analog-to-digital conversion by acquisition
Manage module.
Voltage sample module 5 includes voltage sensor 51, the second a/d conversion device 52, the second central processing unit 53 and second
Wireless transceiver terminal 54, the sampling probe of voltage sensor 51 are serially connected in bus-bar potential transformer secondary side, second voltage
The output end of sensor 51 is connected by the second a/d conversion device 52 with the input of the second central processing unit 53, for by voltage
The voltage data sequence that sensor 51 carries out multiple repairing weld acquisition to alternating voltage output signal is sent to the after analog-to-digital conversion
Two central processing units 53, the input of the output end of the second central processing unit 53 and the second wireless transceiver terminal 54 electrically connect
Connect, processing mould is sent to by the second wireless transceiver terminal 54 for the voltage data sequence after the analog-to-digital conversion by acquisition
Block.
The primary side of busbar current transformer 10 is connected with high voltage AC bus 1, for gathering the mother of high voltage AC bus 1
Line current signal, its secondary side connects the sampling probe of the second current sensor 101, right by second current sensor 101
The bus current signal of high voltage AC bus 1 carries out multi collect, forms bus current data sequence, then the bus current number
After carrying out digital-to-analogue conversion by the 4th a/d conversion device 102 according to sequence, by the 4th central processing unit 103 via the 4th wireless receipts
Hair device terminal 104 is sent to processing module.
Refer to shown in Fig. 2, exchange conductor impedance parameters measurement module 7 include measurement power supply 72 (three-phase alternating-current supply),
Current measuring device 73 (three-phase alternating current flow table), voltage measuring apparatus 74 (three phase current AC voltmeter), earthing or grounding means the 75, the 3rd
A/d conversion device 76, the 3rd wireless transceiver terminal 77, the resistance of exchange wire 71 is the target of measurement, and exchanging wire 71 includes
A phase conductors, B phase conductors and C phase conductors, wherein, A phase conductors, B phase conductors and C phase conductors are formed with high voltage AC bus 1 respectively
Disconnected chalaza be designated as D points, E points and F points respectively, the primary side of alternating-current lightning arrestor 4 and exchange the current signal of the formation of wire 71 and survey
Amount point is located at X points, Y points and Z points on A phase conductors, B phase conductors and C phase conductors respectively；A phase conductors, B phase conductors and C phase conductors
Switch K1, switch K2 and switch K3, X points, Y points and Z points and shaft tower 2 are respectively equipped with disconnected conjunction between high voltage AC bus 1
Between exchange wire 71 on be respectively equipped with switch K4, switch K5 and switch K6.The three-phase output end of measurement power supply 72 passes through three
Phase terminal is respectively connecting to D points, E points and F points, and current measuring device 73 and voltage measuring apparatus 74 are connected with three phase terminals；
Earthing or grounding means 75 includes switching K7, switch K8, switch K9 and K10, and switch K9, switch K8, switch K7 one end are respectively connecting to X
Point, Y points and Z points, the other end of three is by switching K10 ground connection；Current measuring device 73 and voltage measuring apparatus 74 it is defeated
Go out end and three is measured by current vector and electricity by the 3rd a/d conversion device 76 respectively via the 3rd wireless transceiver terminal 77
The amount of pressing to is sent to processing module.It should be noted that the exchange conductor impedance parameters measurement module 7 only need to be in alternating-current lightning arrestor
One-shot measurement is carried out before live detection, later without measuring again.
The one end of wireless transceiver master station 8 is connected with server 9, and the other end then passes through wireless network and voltage, current sample
The second wireless transceiver terminal in module 5,6 and exchange conductor impedance parameters measurement module 7 and busbar current transformer 10
54th, connected realize of the first wireless transceiver terminal 64, the 3rd wireless transceiver terminal 77, the 4th wireless transceiver terminal 104 is led to
News.
The second wireless transceiver terminal 54, the first wireless transceiver terminal 64, the 3rd wireless transceiver terminal 77,
Four wireless transceiver terminals 104 and wireless transceiver master station 8 are wireless router.
In embodiment, high voltage AC bus 1 can use the monopole H type aluminium trolley HXPnR-H of Yangzhou Tian Bao group company,
Bus-bar potential transformer 3 can use the TAK types of Yao Hua Dechangs Electronics Co., Ltd., and alternating-current lightning arrestor 4 can use Guangdong peace fast anti-
The AM type alternating current power supply lightening protectors of thunder Science and Technology Co., Ltd., voltage sensor 51 use Beijing New Chuang Si Fang Electronic Co., Ltd.
HV series voltage sensors, the first current sensor 61 and the second current sensor 101 can use Shenzhen letter Rui Da companies
B1 ac leakage flow sensors LF-MI11-35B1-1.0/0~± 10mA models, the second a/d conversion device 52, the first AD conversion
Device 62, the 3rd a/d conversion device 76 and the 4th a/d conversion device 102 can use the AD876 of Wei Xue Electronics Co., Ltd.s of Shenzhen
Model, the second central processing unit 53, the first central processing unit 63 and the 4th central processing unit 103 can use the Weisheng generation of Shenzhen hundred million
The single-chip microcomputer of Science and Technology Ltd., measurement power supply 72 can use the i/iX series II general AC power supplys of California instrument company, electricity
Flow measuring apparatus 73 and voltage measuring apparatus 74 can use the KR-3VA Intelligent three-phases of Xin Kerui Electric Applicance Co., Ltd of Shenzhen
Pressure/ammeter, earthing or grounding means 75 can use the TB series of ground modules of Beijing Guo electricity Tianbang Science and Technology Co., Ltd., the second wireless receipts
Send out device terminal 54, the first wireless transceiver terminal 64, the 3rd wireless transceiver terminal 77, the and of the 4th wireless transceiver terminal 104
Wireless transceiver master station 8 can use B-Link SOHO wireless routers, the Dell Pow erEdge R410 of server 9.
The present embodiment is by taking the live detection first of the alternating current circuit alternating-current lightning arrestor of certain 500kV voltage class as an example, every
It is similar therewith every the method for the multiple live detection in certain live detection cycle, but repeatedly after live detection, can be according to phase
The 50Hz of alternating-current lightning arrestor impedance value Z between adjacent live detection twice50Rate of change and adjacent live detection twice between 50Hz,
The change of 100Hz, 150Hz, 200Hz, 250Hz, 300Hz, 350Hz, 400Hz and 450Hz angle is all higher than 10 ° of rates of change and entered
Row judges.The process for sampling above-mentioned alternating current circuit alternating-current lightning arrestor electrification detection system progress reliability detection is as follows：
Step 1, exchange conductor impedance parameter is measured by exchanging conductor impedance parameters measurement module 7, its process
It is as follows：
It refer to shown in Fig. 2, disconnect switch K1, K2, K3, K4, K5, K6, K7, K8, K9 and K10, filled by current measurement
Put 73 acquisition current vectorsVoltage vector is obtained by voltage measuring apparatus 74Now impedance Z is calculated according to formula (1)1=
78.2∠83.7°；
It refer to shown in Fig. 3, disconnect switch K1, K2, K3, K4, K5 and K6, closure switch K7, K8, K9 and K10, pass through electricity
Flow measuring apparatus 73 obtains current vectorVoltage vector is obtained by voltage measuring apparatus 74Calculated now according to formula (2)
Impedance Z0=3.81 90 ° of ∠；
Step 2, alternating current is taken to believe the earth-return circuit of the sampling probe of current sensor 61 from alternating-current lightning arrestor 4
Number, after analog-to-digital conversion, form current data sequence I (k)；By the sampling probe of voltage sensor 51 from busbar voltage mutual inductance
The secondary side of device 3 takes alternating voltage output signal, after analog-to-digital conversion, forms voltage data sequence U (k)；By the second electric current
The sampling probe of sensor 101 takes bus ac current signal from the secondary side of busbar current transformer 10, by analog-to-digital conversion
Afterwards, bus current data sequence I is formed1(k)；The sampling probe of first current sensor 61, second current sensor 101 are adopted
Sample is popped one's head in and the sample frequency of the sampling probe of voltage sensor 51 is 500Hz, and the sampling number of three is 500, its
In, k value is 0,1,2 ... 499；
Step 3, by formula (3)-(5), respectively to the current data sequence I (k), voltage data sequence U (k), bus
Current data sequence I1(k) arrange respectively, form new current data sequence I0(k), voltage data sequence U0(k) and bus is electric
Flow data sequenceWith reference to shown in formula (9)-(11)：
I0(k)={ 1.3 × 10-13,4.2×10-14,…,6.7×10-14} (9)
U0(k)={ 2.4 × 10-14,3.6×10-15,…,8.1×10-16} (10)
Voltage data sequence U in step 4, formula (10)0(k) for high voltage AC bus side magnitude of voltage, it is necessary to be converted into
The alternating current circuit arrester magnitude of voltage of shaft tower side, shown in reduction formula such as formula (6), the result of calculation of acquisition is with reference to formula (12)：
U0' (k)={ 7.2 × 10-12,2.7×10-14,…,3.5×10-13} (12)
Step 5, based on formula (2)-(6), by formula (7) and formula (8), extract 50Hz, the 100Hz of alternating-current lightning arrestor,
150Hz, 200Hz, 250Hz, 300Hz, 350Hz, 400Hz, 450Hz impedance value and angle, the structure of acquisition is respectively such as formula
(13) and shown in formula (14)：
Zl=0,0 ..., 0 } (13)
θl=81.49,84.31 ..., 83.98 } (14)
Step 6, the reliability for judging alternating-current lightning arrestor, the method for judgement：
When meeting following condition for the moment, have a power failure the replacing alternating-current lightning arrestor：
50Hz current value I0(50) it is more than 50mA；
The 50Hz of alternating-current lightning arrestor impedance value Z between adjacent live detection twice50Rate of change be more than 100%；
When meeting following condition for the moment, cycle of the adjacent secondary live detection of reduction alternating-current lightning arrestor is to strengthen monitoring：
The 50Hz of alternating-current lightning arrestor impedance value Z between adjacent live detection twice50Rate of change be more than and 50% and be less than
70%；
Between adjacent live detection twice 50Hz, 100Hz, 150Hz, 200Hz, 250Hz, 300Hz, 350Hz, 400Hz and
The change of 450Hz angle is all higher than 10 °.
The alternating-current lightning arrestor only analyzes its 50Hz current value I due to being DATA REASONING and analysis first0(50) it is
0.618mA, less than 50mA, therefore, the running status of the alternating-current lightning arrestor is good.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and the embodiment simultaneously is not used to limit this hair
Bright the scope of the claims, all equivalence enforcements or change without departing from carried out by the present invention, it is intended to be limited solely by the scope of the claims of this case.
Claims (2)
- A kind of 1. alternating current circuit alternating-current lightning arrestor live detection method, it is characterised in that it comprises the following steps：Step 1, the measurement by exchanging conductor impedance parameters measurement module progress AC line voltage vector sum current vector, and Exchange conductor impedance parameter is calculated, the exchange conductor impedance parameter is between high voltage AC bus and current signal measurement point The impedance parameter of alternating current circuit；The current signal measurement point is that the primary side of the alternating-current lightning arrestor positioned at shaft tower side is connected to friendship Contact on Flow Line；The exchange wire includes A phase conductors, B phase conductors and C phase conductors, wherein, A phase conductors, B phase conductors The disconnected chalaza formed respectively with high voltage AC bus with C phase conductors is designated as D points, E points and F points respectively, and alternating-current lightning arrestor is once Side with exchange the current signal measurement point of wire formation respectively the X points on A phase conductors, B phase conductors and the C phase conductors, Y points and Z points；Switch K1, switch are respectively equipped with disconnected conjunction between the A phase conductors, B phase conductors and C phase conductors and high voltage AC bus K2 and switch K3, exchanging between the X points, Y points and Z points and shaft tower are respectively equipped with switch K4, switch K5 and switch on wire K6；The exchange conductor impedance parameters measurement module includes measurement power supply, current measuring device, voltage measuring apparatus, ground connection dress Put；Wherein, measure the three-phase output end of power supply and be respectively connecting to D points, E points and F points by three phase terminals, on three phase terminal It is connected with current measuring device and voltage measuring apparatus；The earthing or grounding means includes switch K7, switch K8, switch K9 and K10, institute State switch K9, switch K8, switch K7 one end be respectively connecting to X points, Y points and Z points, the other end of three is by switching K10 Ground connection；The step 1 comprises the following steps：Step 11, disconnect switch K1, K2, K3, K4, K5, K6, K7, K8, K9 and K10, by current measuring device obtain electric current to AmountVoltage vector is obtained by voltage measuring apparatusNow impedance Z is calculated according to formula (1)1：<mrow> <msub> <mi>Z</mi> <mn>1</mn> </msub> <mo>=</mo> <mfrac> <msub> <mover> <mi>U</mi> <mo>&CenterDot;</mo> </mover> <mn>1</mn> </msub> <msub> <mover> <mi>I</mi> <mo>&CenterDot;</mo> </mover> <mn>1</mn> </msub> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>Step 12, switch K1, K2, K3, K4, K5 and K6 are disconnected, closure switch K7, K8, K9 and K10, pass through current measuring device Obtain current vectorVoltage vector is obtained by voltage measuring apparatusNow impedance Z is calculated according to formula (2)0：<mrow> <msub> <mi>Z</mi> <mn>0</mn> </msub> <mo>=</mo> <mfrac> <msub> <mover> <mi>U</mi> <mo>&CenterDot;</mo> </mover> <mn>0</mn> </msub> <msub> <mover> <mi>I</mi> <mo>&CenterDot;</mo> </mover> <mn>0</mn> </msub> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> <mo>;</mo> </mrow>Step 2, the sampling probe of the first current sensor taken into ac current signal from the earth-return circuit of alternating-current lightning arrestor, passed through After crossing analog-to-digital conversion, current data sequence I (k) is formed；The sampling probe of voltage sensor is secondary from bus-bar potential transformer Alternating voltage output signal is taken in side, after analog-to-digital conversion, forms voltage data sequence U (k)；By the second current sensor Sampling probe takes bus ac current signal from busbar current transformer secondary side, after analog-to-digital conversion, forms bus electricity Flow data sequence I1(k)；The sampling probe and voltage sensor of the sampling probe of first current sensor, the second current sensor The sample frequency of the sampling probe of device is 500Hz, and the sampling number of three is 500, wherein, k value is 0,1,2 ... 499；Step 3, by formula (3)-(5), respectively to the current data sequence I (k), voltage data sequence U (k), bus current Data sequence I1(k) arrange respectively, form new current data sequence I0(k), voltage data sequence U0And bus current number (k) According to sequence<mrow> <msub> <mi>I</mi> <mn>0</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>n</mi> <mo>=</mo> <mn>0</mn> </mrow> <mn>499</mn> </munderover> <mi>I</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>)</mo> </mrow> <msup> <mi>e</mi> <mrow> <mo>-</mo> <mi>j</mi> <mfrac> <mrow> <mn>2</mn> <mi>&pi;</mi> <mi>k</mi> </mrow> <mn>500</mn> </mfrac> </mrow> </msup> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> </mrow><mrow> <msub> <mi>U</mi> <mn>0</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>n</mi> <mo>=</mo> <mn>0</mn> </mrow> <mn>499</mn> </munderover> <mi>U</mi> <mrow> <mo>(</mo> <mi>n</mi> <mo>)</mo> </mrow> <msup> <mi>e</mi> <mrow> <mo>-</mo> <mi>j</mi> <mfrac> <mrow> <mn>2</mn> <mi>&pi;</mi> <mi>k</mi> </mrow> <mn>500</mn> </mfrac> </mrow> </msup> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>4</mn> <mo>)</mo> </mrow> </mrow><mrow> <msubsup> <mi>I</mi> <mn>0</mn> <mn>1</mn> </msubsup> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>n</mi> <mo>=</mo> <mn>0</mn> </mrow> <mn>499</mn> </munderover> <msup> <mi>I</mi> <mn>1</mn> </msup> <mrow> <mo>(</mo> <mi>n</mi> <mo>)</mo> </mrow> <msup> <mi>e</mi> <mrow> <mo>-</mo> <mi>j</mi> <mfrac> <mrow> <mn>2</mn> <mi>&pi;</mi> <mi>k</mi> </mrow> <mn>500</mn> </mfrac> </mrow> </msup> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>5</mn> <mo>)</mo> </mrow> </mrow>Voltage data sequence U in step 4, formula (4)0(k) for high voltage AC bus side magnitude of voltage, it is necessary to be converted into shaft tower side Alternating current circuit arrester magnitude of voltage, shown in reduction formula such as formula (6)：<mrow> <msubsup> <mi>U</mi> <mn>0</mn> <mo>&prime;</mo> </msubsup> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>=</mo> <mfrac> <mrow> <msub> <mi>U</mi> <mn>0</mn> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <msqrt> <mrow> <msub> <mi>Z</mi> <mn>0</mn> </msub> <mo>/</mo> <msub> <mi>Z</mi> <mn>1</mn> </msub> </mrow> </msqrt> </mrow> <mn>250</mn> </mfrac> <mo>+</mo> <mfrac> <mrow> <msubsup> <mi>I</mi> <mn>0</mn> <mn>1</mn> </msubsup> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <msqrt> <mrow> <msub> <mi>Z</mi> <mn>0</mn> </msub> <msub> <mi>Z</mi> <mn>1</mn> </msub> </mrow> </msqrt> <mi>sinh</mi> <mrow> <mo>(</mo> <msup> <mi>coth</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <msqrt> <mrow> <msub> <mi>Z</mi> <mn>0</mn> </msub> <mo>/</mo> <msub> <mi>Z</mi> <mn>1</mn> </msub> </mrow> </msqrt> <mo>)</mo> </mrow> </mrow> <mn>250</mn> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>6</mn> <mo>)</mo> </mrow> </mrow>In formula (6), sinh is hyperbolic sine function, coth-1For the inverse function of hyperbolic cosine；Step 5, based on formula (2)-(6), extract 50Hz, 100Hz, 150Hz, 200Hz, 250Hz, the 300Hz of alternating-current lightning arrestor, 350Hz, 400Hz, 450Hz impedance value and angle, respectively as shown in formula (7) and formula (8)：<mrow> <msub> <mi>Z</mi> <mi>l</mi> </msub> <mo>=</mo> <mfrac> <mrow> <msup> <mrow> <mo>(</mo> <msup> <mrow> <mo>(</mo> <mi>Re</mi> <mo>(</mo> <msubsup> <mi>U</mi> <mn>0</mn> <mo>&prime;</mo> </msubsup> <mo>(</mo> <mi>l</mi> <mo>)</mo> <mo>)</mo> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mi>Im</mi> <mo>(</mo> <msubsup> <mi>U</mi> <mn>0</mn> <mo>&prime;</mo> </msubsup> <mo>(</mo> <mi>l</mi> <mo>)</mo> <mo>)</mo> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>)</mo> </mrow> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </msup> <mo>*</mo> <msup> <mi>e</mi> <mrow> <mi>j</mi> <mi>a</mi> <mi>r</mi> <mi>c</mi> <mi>t</mi> <mi>a</mi> <mi>n</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>Im</mi> <mrow> <mo>(</mo> <msubsup> <mi>U</mi> <mn>0</mn> <mo>&prime;</mo> </msubsup> <mo>(</mo> <mi>l</mi> <mo>)</mo> </mrow> <mo>)</mo> </mrow> <mrow> <mi>Re</mi> <mrow> <mo>(</mo> <msubsup> <mi>U</mi> <mn>0</mn> <mo>&prime;</mo> </msubsup> <mo>(</mo> <mi>l</mi> <mo>)</mo> </mrow> <mo>)</mo> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow> </msup> </mrow> <mrow> <msup> <mrow> <mo>(</mo> <msup> <mrow> <mo>(</mo> <mi>Re</mi> <mo>(</mo> <msub> <mi>I</mi> <mn>0</mn> </msub> <mo>(</mo> <mi>l</mi> <mo>)</mo> <mo>)</mo> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mi>Im</mi> <mo>(</mo> <msub> <mi>I</mi> <mn>0</mn> </msub> <mo>(</mo> <mi>l</mi> <mo>)</mo> <mo>)</mo> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>)</mo> </mrow> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </msup> <mo>*</mo> <msup> <mi>e</mi> <mrow> <mi>j</mi> <mi>a</mi> <mi>r</mi> <mi>c</mi> <mi>t</mi> <mi>a</mi> <mi>n</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>Im</mi> <mrow> <mo>(</mo> <msub> <mi>I</mi> <mn>0</mn> </msub> <mo>(</mo> <mi>l</mi> <mo>)</mo> </mrow> <mo>)</mo> </mrow> <mrow> <mi>Re</mi> <mrow> <mo>(</mo> <msub> <mi>I</mi> <mn>0</mn> </msub> <mo>(</mo> <mi>l</mi> <mo>)</mo> </mrow> <mo>)</mo> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow> </msup> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>7</mn> <mo>)</mo> </mrow> </mrow><mrow> <msub> <mi>&theta;</mi> <mi>l</mi> </msub> <mo>=</mo> <mi>a</mi> <mi>r</mi> <mi>c</mi> <mi>t</mi> <mi>a</mi> <mi>n</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>Im</mi> <mrow> <mo>(</mo> <msub> <mi>I</mi> <mn>0</mn> </msub> <mo>(</mo> <mi>l</mi> <mo>)</mo> </mrow> <mo>)</mo> </mrow> <mrow> <mi>Re</mi> <mrow> <mo>(</mo> <msub> <mi>I</mi> <mn>0</mn> </msub> <mo>(</mo> <mi>l</mi> <mo>)</mo> </mrow> <mo>)</mo> </mrow> </mfrac> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>8</mn> <mo>)</mo> </mrow> </mrow>In formula (7) and formula (8), l takes 50,100,150,200,250,300,350,400 and 450Hz respectively；Step 6, the reliability for judging alternating-current lightning arrestor, the method for judgement：When meeting following condition for the moment, have a power failure the replacing alternating-current lightning arrestor：50Hz current value I0(50) it is more than 50mA；The 50Hz of alternating-current lightning arrestor impedance value Z between adjacent live detection twice50Rate of change be more than 100%；When meeting following condition for the moment, cycle of the adjacent secondary live detection of reduction alternating-current lightning arrestor is to strengthen monitoring：The 50Hz of alternating-current lightning arrestor impedance value Z between adjacent live detection twice50Rate of change be more than 50% and less than 70%；50Hz, 100Hz, 150Hz, 200Hz, 250Hz, 300Hz, 350Hz, 400Hz and 450Hz between adjacent live detection twice The change of angle is all higher than 10 °.
- 2. alternating-current lightning arrestor live detection method in alternating current circuit according to claim 1, it is characterised in that if exchange is kept away The 50Hz of thunder device, 100Hz, 150Hz, 200Hz, 250Hz, 300Hz, 350Hz, 400Hz, headed by 450Hz impedance value and angle It is secondary when measuring, then only consider 50Hz current value I0(50) whether it is more than 50mA.
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| JPS62207974A (en) * | 1986-03-07 | 1987-09-12 | Ngk Insulators Ltd | Monitoring system for lightning insulator |
| CN102590627A (en) * | 2012-04-01 | 2012-07-18 | 甘肃省电力公司电力科学研究院 | Test instrument for high-voltage power transmission line |
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| CN103576032A (en) * | 2013-11-14 | 2014-02-12 | 国家电网公司 | On-line detection device and method of power device |
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| JPS62207974A (en) * | 1986-03-07 | 1987-09-12 | Ngk Insulators Ltd | Monitoring system for lightning insulator |
| CN102621457A (en) * | 2012-03-13 | 2012-08-01 | 福建省电力有限公司莆田电业局 | On-line detection method of metal oxide arrester insulating property influencing factor |
| CN102590627A (en) * | 2012-04-01 | 2012-07-18 | 甘肃省电力公司电力科学研究院 | Test instrument for high-voltage power transmission line |
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