CN207924041U - High voltage direct current neutral bus arrester energy is resistant to on-line monitoring system - Google Patents
High voltage direct current neutral bus arrester energy is resistant to on-line monitoring system Download PDFInfo
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- CN207924041U CN207924041U CN201820323706.5U CN201820323706U CN207924041U CN 207924041 U CN207924041 U CN 207924041U CN 201820323706 U CN201820323706 U CN 201820323706U CN 207924041 U CN207924041 U CN 207924041U
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Abstract
The utility model is related to a kind of high voltage direct current neutral bus arrester energy to be resistant to on-line monitoring system, the DC voltage measurement consequential signal output end of its first DC voltage measurement interface cabinet connects the electric signal input end of the first fibre distribution frame cabinet, first optical signal input of the light signal output end connection voltage measuring apparatus optical signal processor of the first fibre distribution frame cabinet, the current acquisition mouth of the signal output end connection electrographic recording instrument of Transient Transformer, the markers of the electrographic recording instrument connects the markers and current sampling signal interface of host computer with current sampling signal output end, the markers of voltage measuring apparatus optical signal processor connects the markers and voltage sampling signal of host computer with voltage sampling signal output end;The sensor coil of Transient Transformer is sleeved on the down conductor of neutral bus arrester.The utility model effectively can be resistant to situation by energy of the monitoring and evaluation arrester in action process, effectively increase the security reliability of high-voltage direct current operation.
Description
Technical field
The utility model is related to arrester monitoring technical fields, and in particular to a kind of high voltage direct current neutral bus arrester energy
Amount tolerance on-line monitoring system.
Background technology
With moving forward steadily for China's electric system " transferring electricity from the west to the east, north and south supply mutually, national network " strategy, high-voltage dc transmission
Electric system will be used wider and wider in power grid is general.Compared to high-voltage AC transmission, there is D.C. high voltage transmission conveying to hold
Amount is big, long transmission distance, the advantages that small is lost, and there is no the stable problems of synchronous operation.Current conversion station is D.C. high voltage transmission
The hinge of engineering simultaneously plays a key role entire DC transmission engineering, but the AC and DC equipment manufacturing cost in station is expensive, therefore
Arrester is be unable to do without to the overvoltage protection of main equipment.
Neutral bus arrester is mounted to the lightning arrester connected in parallel group on current conversion station neutral bus, when event occurs for system line
Barrier or transverter occur that local false triggering etc. is not also easy to produce larger overvoltage on neutral bus when operated and energy is huge, to protect
Shield equipment need to not had the ability for absorbing million burnt grade energy by overvoltage damage neutral bus arrester.Although neutral bus is lightning-arrest
Device group can carry out equal properties of flow experiment in manufacture, but in actual moving process with the increase for being subjected to impact current times and
The influence of environment temperature, each valve block performance can occur to deteriorate to some extent and its nonuniformity coefficient can exceed that permissible value, from
And lead to that larger difference gradually occurs for equal properties of flow and its energy capability decreases.It is run for neutral bus arrester
In maintenance and pilot project, period and standard lack related request in all kinds of regulations at present.Simultaneously in the direct current work that put into operation
Cheng Zhong mainly measures arrester letting out under continuous running voltage for the online evaluation method of neutral bus arrester performance
Leakage current and percussion action number, but the voltage that is born when neutral bus arrester normal operation is extremely low and leakage current is microampere
Grade, therefore can not energy tolerance situation of effective monitoring and evaluation arrester in action process.
Invention content
The purpose of this utility model is to provide a kind of high voltage direct current neutral bus arrester energy to be resistant to on-line monitoring system
System, the utility model realize the on-line monitoring to runnability in neutral bus arrester group action process, are recorded by failure
It is pre- that the parameters such as wave is resistant to the overvoltage for calculating each column neutral bus arrester of analysis, energy is resistant to make assessment to arrester
It is alert, it effectively reduces neutral bus arrester and is latched caused by surge arrester failure without sign accident and straight-flow system and forced outage
Number improves the security reliability of system operation.
In order to solve the above technical problems, a kind of high voltage direct current neutral bus arrester energy tolerance disclosed by the utility model
On-line monitoring system, it is characterised in that:It include electrographic recording instrument, voltage measuring apparatus optical signal processor, host computer and temporarily
State current sensor, wherein the current acquisition mouth of the signal output end connection electrographic recording instrument of Transient Transformer, it is described to show
The markers of wave recorder connects the markers and current sampling signal interface of host computer, voltage measurement with current sampling signal output end
The markers of device optical signal processor connects the markers and voltage sampling signal interface of host computer with voltage sampling signal output end,
The optical signal that first optical signal input of voltage measuring apparatus optical signal processor is used to connect the first fibre distribution frame cabinet is defeated
The electric signal input end of outlet, the first fibre distribution frame cabinet is used to connect the DC voltage survey of the first DC voltage measurement interface cabinet
Measure consequential signal output end;
The sensor coil of the Transient Transformer is sleeved on the down conductor of neutral bus arrester.
The beneficial effects of the utility model:
1, the utility model has single time 24 neutral bus arresters of real-time high-precision synchronous acquisition high-voltage direct current
The function of transient current;
2, each branch arrester transient current according to acquisition, transient voltage, it is each that the utility model can calculate analysis automatically
The current distribution characteristic of column arrester, overvoltage tolerance are resistant to situation with energy, and are completed to neutral bus according to monitoring criterion
The Performance Evaluation early warning of arrester;
3, in the utility model, host computer can preserve 10 seconds data 100,000 after extracting the real-time collection value of voltage in memory
Point, and be more than the automatic startup recording of the alarms such as setting value limitation according to voltage magnitude, preserve disturbance recorder data.
4, the utility model effectively accesses the arrester group of analysis according to DC transmission system Operation Mode Selection, to reality
The arrester group Temporal Data of operation is automatically analyzed, generated and is exported report waveform.
5, the utility model can make assessment early warning to the performance of neutral bus arrester, can effectively monitoring and evaluation take shelter from the thunder
Energy of the device in action process is resistant to situation, effectively increases the security reliability of high-voltage direct current operation.
Description of the drawings
Fig. 1 is the systematic schematic diagram of the utility model.
Wherein, the 1-the first DC voltage measurement interface cabinet, the 1.1-the second DC voltage measurement interface cabinet, the 2-the first light
Fine distributing frame cabinet, the 2.1-the second fibre distribution frame cabinet, 3-neutral bus arresters, 4-electrographic recording instrument, 5-voltage measurements
Device optical signal processor, 6-host computers, 7-Transient Transformers.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
A kind of high voltage direct current neutral bus arrester energy designed by the utility model is resistant to on-line monitoring system, such as schemes
Shown in 1, it includes that electrographic recording instrument 4, voltage measuring apparatus optical signal processor 5, host computer 6 and Transient Transformer 7 (are matched
It is equipped with the attachmentes such as power module, power cord, signal wire, rainproof, moisture barrier sheath), wherein the signal of Transient Transformer 7
Output end connects the current acquisition mouth of electrographic recording instrument 4, and the markers and current sampling signal output end of the electrographic recording instrument 4 connect
Connect the markers and current sampling signal interface of host computer 6, markers and the voltage sample letter of voltage measuring apparatus optical signal processor 5
The markers and voltage sampling signal interface of number output end connection host computer 6, the first light of voltage measuring apparatus optical signal processor 5
Signal input part is used to connect the light signal output end of the first fibre distribution frame cabinet 2, and the electric signal of the first fibre distribution frame cabinet 2 is defeated
Enter DC voltage measurement consequential signal output end of the end for connecting the first DC voltage measurement interface cabinet 1;
The sensor coil of the Transient Transformer 7 is sleeved on the down conductor of neutral bus arrester 3.
In above-mentioned technical proposal, electrographic recording instrument 4, voltage measuring apparatus optical signal processor 5 and host computer are arranged in directly
It monitors on-line in cabinet current relay room.
In above-mentioned technical proposal, the signal wire of Transient Transformer 7 is by pre-buried coating steel pipe through coaxial shielded cable
Ditch is connected in the on-line monitoring cabinet of DC relay room, BNC (Bayonet Nut Connector, snap-fit connector)
Output interface is connected directly with 4 voltage acquisition module BNC input interfaces of electrographic recording instrument;
In above-mentioned technical proposal, DC relay room on-line monitoring cabinet passes through armored fiber optic with two-way voltage signal output point
Cable is connected through cable duct, and voltage measuring apparatus optical signal processor 5 has upper-layer protocol and by network interface and background monitoring point
Analysis system communicates, and upload arrester is temporary after FT3 fiber-optic signals are converted to IEC61850-9-2 ethernet signals by conversion module
The real time datas such as state electric current and instantaneous voltage, virtual value, average value, history recording;
In above-mentioned technical proposal, the DC voltage measurement end of the first DC voltage measurement interface cabinet 1 is changed for accessing
1 DC voltage measuring device of polar curve in stream station.
In above-mentioned technical proposal, the Transient Transformer 7 is active Hall current sensor.
In above-mentioned technical proposal, the Transient Transformer 7 has multiple, the sensing line of each Transient Transformer 7
Circle is respectively fitted on the down conductor of corresponding neutral bus arrester 3.
In above-mentioned technical proposal, neutral bus arrester 3 is mounted near the DC transformer of high-voltage direct current power grid, is used for
Protection protection direct-flow inverter and rectifier.
In above-mentioned technical proposal, the second optical signal input of the voltage measuring apparatus optical signal processor 5 is for connecting
The light signal output end of the second fibre distribution frame cabinet 2.1 is connect, the electric signal input end of the second fibre distribution frame cabinet 2.1 is for connecting
The DC voltage measurement consequential signal output end of second DC voltage measurement interface cabinet 1.1.
The DC voltage measurement end of the second DC voltage measurement interface cabinet 1.1 is used to access the polar curve 2 in current conversion station
DC voltage measuring device.
In above-mentioned technical proposal, the first DC voltage measurement interface cabinet 1, the second DC voltage measurement interface cabinet 1.1, first
Fibre distribution frame cabinet 2, the second fibre distribution frame cabinet 2.1, neutral bus arrester 3, electrographic recording instrument 4, voltage measuring apparatus light
Signal processor 5, host computer 6 and Transient Transformer 7 are existing conventional equipment, wherein the first DC voltage measurement connects
The model AII2-205J of mouth cabinet 1, the model AII1-209J of the second DC voltage measurement interface cabinet 1.1, the first optical fiber are matched
The model AII2-204J of coil holder cabinet 2, the model AII1-208J of the second fibre distribution frame cabinet 2.1, the type of electrographic recording instrument 4
Number it is Yokogawa DL850E, voltage measuring apparatus optical signal processor 5 can complete the fiber-optic signal data to combining unit
(IEC60044-8 agreements) acquisition, recording and the function with triggering clock synchronization synchronous with DL850E, host computer 6 is common computer,
Transient Transformer 7 is the CPCO-1000-77-BP5 sensors of GMW.
In above-mentioned technical proposal, the electrographic recording instrument 4 is used to record by GPS clock module and antenna and preserve electric current
The absolute time mark information of data;Voltage measuring apparatus optical signal processor acquires two-way neutral bus voltage FT3 fiber-optic signals simultaneously
IEC61850-9-2 ethernet signals are converted to, host computer is sent to together by corresponding time calibrating and transient voltage data.
In above-mentioned technical proposal, the host computer 6 is used for electrographic recording instrument 4 and voltage measuring apparatus optical signal processor
The current signal and neutral bus voltage signal of 5 storages carry out data extraction, and are aligned using markers, to keep away neutral bus
The equal properties of flow of thunder device, energy tolerance performance synchronize analysis and monitoring and evaluation.
In above-mentioned technical proposal, the host computer 6 presets assessment strategy to the energy capability that neutral bus is taken shelter from the thunder and is
The product of arrester synchronizing current and voltage is to the integral of time, the system when each column arrester actual energy, which absorbs, is less than preset value
Prompt arrester energy tolerance situation normal;When each column arrester actual energy absorb be more than preset value when system prompt this keep away
It is abnormal that thunder device energy is resistant to situation.
The present invention the on-line monitoring course of work be:
First, when neutral bus arrester 3 acts (once arrester failure will trigger voltage collecting work), temporarily
State current sensor 7 obtains the transient current of arrester from the down conductor of neutral bus arrester 3;
First DC voltage measurement interface cabinet 1 and the second DC voltage measurement interface cabinet 1.1 pole out of current conversion station respectively
Dc voltage measurements are obtained in 2 DC voltage measuring device of polar curve in 1 DC voltage measuring device of line and current conversion station;
Then, electrographic recording instrument 4 records the absolute time mark information of transient current data, and is sent together with transient current data
To host computer 6;
Voltage measuring apparatus optical signal processor 5 is acquired and is protected by neutral bus voltage DC measuring device in the two poles of the earth in station
Deposit the two-way dc voltage measurements fiber-optic signal of the first fibre distribution frame cabinet 2 and the output of the second fibre distribution frame cabinet 2.1;
Voltage measuring apparatus optical signal processor 5, which is converted to two-way dc voltage measurements fiber-optic signal, corresponding to be had
The IEC61850-9-2 ethernet signals of two-way dc voltage measurements, and two-way dc voltage measurements are subjected to the corresponding time
After calibration, is communicated with host computer by network interface and be sent to two-way dc voltage measurements and its absolute time mark information together
Position machine 6;
Finally, the transient state electricity that the host computer 6 conveys electrographic recording instrument 4 and voltage measuring apparatus optical signal processor 5
Flow data, the absolute time mark information of transient current data, two-way dc voltage measurements and two-way dc voltage measurements
Absolute time mark information carries out markers alignment, and is synchronized point to the equal properties of flow of neutral bus arrester, energy tolerance performance
Analysis and monitoring and evaluation.
In above-mentioned technical proposal, electrographic recording instrument records each column arrester transient current signal by data acquisition channel,
Its current sample channel each electric current of automatic trigger when arbitrary channel current surmounts setting limit value is realized by " or triggering " pattern
Sampling channel while recording;
Host computer extracts electrographic recording instrument and the current signal in voltage measuring apparatus optical signal processing unit and voltage letter
Number, and markers parsing, alignment are carried out, then by calculating equal properties of flow to neutral bus arrester, energy tolerance
Analysis and monitoring and evaluation can be synchronized.
In above-mentioned technical proposal, electrographic recording instrument is recorded by GPS clock module and antenna and preserves each current channel
The absolute time mark information of each current sampling data point, i.e., preserve 1 sampled data at interval of 1 microsecond, and the setting of recording moment exists
The centre position of waveform ensures the integrality of recorder data and using GPS or external clock input mode and voltage measuring apparatus light
Signal processing unit synchronizes clock synchronization into row clock;Voltage measuring apparatus optical signal processing unit is on " Hour Minute Second " absolute time mark basis
On voltagerating delay value stored by newly-increased microsecond time scale, sample frequency is that 10kHz preserves one at interval of 100 microseconds and adopts
Sample data;Background monitoring analysis system by the time scale information of the voltage and the current sampling data point that upload simultaneously and data information into
Basis presets assessment strategy calculating and analyzes neutral bus arrester energy tolerance performance after row is aligned and arranges;
In above-mentioned technical proposal, it is ± 1000A that current sensor, which uses single-voltage-supply cmos mode, rated current, and maximum is surveyed
Amount current amplitude is ± 1250A, and precision is ± 1%, nonlinearity<± 0.5%, bandwidth range is DC~40kHz;
In above-mentioned technical proposal, 24 data acquisition channel parallel samplings of electrographic recording instrument, the recording time is 300ms, is appointed
Gathered data is automatically saved after the triggering of meaning channel, data-interface uses Ethernet, USB flash disk or SD card interface, memory 250M hard disks
500G, sample rate 1MS/s, resolution ratio 16-bit, 0~300kHz of bandwidth;
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (6)
1. a kind of high voltage direct current neutral bus arrester energy is resistant to on-line monitoring system, it is characterised in that:It includes oscillography note
Record instrument (4), voltage measuring apparatus optical signal processor (5), host computer (6) and Transient Transformer (7), wherein transient state electricity
The current acquisition mouth of the signal output end connection electrographic recording instrument (4) of flow sensor (7), the markers of the electrographic recording instrument (4)
The markers and current sampling signal interface of host computer (6), voltage measuring apparatus optical signal are connected with current sampling signal output end
The markers of processor (5) connects the markers and voltage sampling signal interface of host computer (6), voltage with voltage sampling signal output end
First optical signal input of measuring device optical signal processor (5) is used to connect the optical signal of the first fibre distribution frame cabinet (2)
Output end, the electric signal input end of the first fibre distribution frame cabinet (2) is for connecting the straight of the first DC voltage measurement interface cabinet (1)
Galvanic electricity presses measurement signals output end;
The sensor coil of the Transient Transformer (7) is sleeved on the down conductor of neutral bus arrester (3).
2. high voltage direct current neutral bus arrester energy according to claim 1 is resistant to on-line monitoring system, feature exists
In:The DC voltage measurement end of the first DC voltage measurement interface cabinet (1) is used to access 1 direct current of polar curve in current conversion station
Pressure measuring device.
3. high voltage direct current neutral bus arrester energy according to claim 1 is resistant to on-line monitoring system, feature exists
In:The Transient Transformer (7) is active Hall current sensor.
4. high voltage direct current neutral bus arrester energy according to claim 1 is resistant to on-line monitoring system, feature exists
In:The Transient Transformer (7) has multiple, and the sensor coil of each Transient Transformer (7) is respectively fitted over corresponding
On the down conductor of neutral bus arrester (3).
5. high voltage direct current neutral bus arrester energy according to claim 1 is resistant to on-line monitoring system, feature exists
In:Second optical signal input of the voltage measuring apparatus optical signal processor (5) is for connecting the second fibre distribution frame cabinet
(2.1) electric signal input end of light signal output end, the second fibre distribution frame cabinet (2.1) is surveyed for connecting the second DC voltage
Measure the DC voltage measurement consequential signal output end of interface cabinet (1.1).
6. high voltage direct current neutral bus arrester energy according to claim 5 is resistant to on-line monitoring system, feature exists
In:The DC voltage measurement end of the second DC voltage measurement interface cabinet (1.1) is used to access 2 direct current of polar curve in current conversion station
Voltage measuring apparatus.
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CN108414862A (en) * | 2018-03-09 | 2018-08-17 | 中国南方电网有限责任公司超高压输电公司曲靖局 | High voltage direct current neutral bus arrester energy is resistant to on-line monitoring system and method |
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CN108414862A (en) * | 2018-03-09 | 2018-08-17 | 中国南方电网有限责任公司超高压输电公司曲靖局 | High voltage direct current neutral bus arrester energy is resistant to on-line monitoring system and method |
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