CN109142985A - A kind of fault oscillograph system for Travelling Wave Fault Location - Google Patents
A kind of fault oscillograph system for Travelling Wave Fault Location Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
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Abstract
The present invention relates to technical field of power systems, specifically disclose a kind of fault oscillograph system for Travelling Wave Fault Location, wherein, the fault oscillograph system for Travelling Wave Fault Location includes: data acquisition device, data converging device and Data Control Center, the data acquisition device is mounted on power transmission line, the data converging device is mounted on shaft tower, the data acquisition device and data converging device communication connection, the data converging device and Data Control Center communication connection.Have the characteristics that high precision, high reliablity and ranging are accurate provided by the present invention for the fault oscillograph system of Travelling Wave Fault Location.
Description
Technical field
The present invention relates to technical field of power systems more particularly to a kind of fault oscillograph systems for Travelling Wave Fault Location
System.
Background technique
Currently, the method used in terms of distribution line failure positioning has traveling wave method and impedance method.Impedance method fault location
There are precision problem, error be mainly derived from algorithm itself it is assumed that positioning accuracy is influenced by the transition resistance of fault point,
When transition resistance only when fault point is zero, the distance of fault point could be calculated more accurately.The principle of traveling wave method
It is time difference for being propagated between fault point and measurement point using traveling wave to measure fault distance, traveling wave method is not by fault point transition
The influence of the factors such as resistance, line construction, range accuracy is high, applied widely.
Fault oscillograph is a kind of automation equipment for monitoring Operation of Electric Systems situation.By to fault oscillograph
The information that device is recorded is analyzed, and can determine be out of order separate, Current Voltage amplitude, the action row of protective relaying device
For fault messages such as, switch motion numbers.After line failure, fault point is rapidly and accurately searched out, shortens troubleshooting
Time to restore electricity as early as possible, becomes an important indicator of power supply reliability.Traditional fault oscillograph essential record event
Stable state waveform after barrier generation can diagnose the stable state after occurring that is out of order, low frequency fault message, important transient fault is believed
Breath is filtered as invalid information.Transient-wave after traveling wave method fault location needs to occur using failure carries out fault location, because
How this, provide a kind of technical problem that high-precision transient fault recorder device is urgently to be resolved as those skilled in the art.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art, it is a kind of fixed for traveling wave fault to provide
The fault oscillograph system of position, to solve the problems of the prior art.
As one aspect of the present invention, a kind of fault oscillograph system for Travelling Wave Fault Location is provided, wherein institute
Stating for the fault oscillograph system of Travelling Wave Fault Location includes: in data acquisition device, data converging device and data control
The heart, the data acquisition device are mounted on power transmission line, and the data converging device is mounted on shaft tower, the data acquisition dress
It sets and is communicated to connect with the data converging device, the data converging device and Data Control Center communication connection,
The data acquisition device can acquire voltage signal and current signal on power transmission line in real time, and can will be collected
The voltage signal and current signal are sent to the data converging device after being handled, the data converging device can connect
The control instruction of the Data Control Center is received, and can be referred to according to the control instruction to data acquisition device transmission
It enables, and classification merging and storage can be carried out to the voltage signal and the current signal, and after the merging that can will classify
The voltage signal and the current signal be sent to the Data Control Center, the Data Control Center can will be described
Voltage signal and the current signal are loaded onto the position for carrying out being calculated failure generation in Travelling Wave Fault Location algorithm.
Preferably, the data acquisition device includes the first data acquisition device, the second data acquisition device and third number
According to acquisition device, first data acquisition device is mounted in the A phase of power transmission line, and second data acquisition device is mounted on
In the B phase of power transmission line, the third data acquisition device is mounted in the C phase of power transmission line, and first data acquisition device is used
Voltage signal and current signal in the A phase of acquisition power transmission line, second data acquisition device are used to acquire the B of power transmission line
Voltage signal and current signal in phase, the third data acquisition device are used to acquire the voltage signal in the C phase of power transmission line
And current signal.
Preferably, the data acquisition device includes signal acquisition unit, AD conversion unit, clock synchronization unit,
One data processing unit, the first data storage cell and the first wireless communication unit,
The signal acquisition unit for acquiring voltage signal and current signal on power transmission line in real time；
The voltage signal and current signal analog-to-digital conversion that the AD conversion unit is used to simulate obtain digitized voltage letter
Number and current signal；
The clock synchronization unit is used to carry out time service to the data acquisition device to obtain timestamp；
First data processing unit is for merging digitized voltage signal and current signal with the timestamp after time service
It is handled, and the control instruction for sending to the data converging device carries out processing and response；
First data storage cell is used for first data processing unit treated voltage signal and current signal
It is stored；
First wireless communication unit is for realizing wireless between the data acquisition device and the data converging device
Communication.
Preferably, the data acquisition device further includes the first power supply unit, first power supply unit respectively with it is described
Clock synchronization unit, the first data processing unit and the connection of the first wireless communication unit, first power supply unit are used for as institute
The work for stating data acquisition device provides power supply supply.
Preferably, first power supply unit includes CT electricity-fetching module, CT coil, charging module and rechargeable battery, described
CT electricity-fetching module is mounted on the power transmission line by the CT coil, and the CT electricity-fetching module can will be from the power transmission line
The electric energy of acquisition provides power supply supply for data acquisition device work, and can be filled by the charging module to described
Battery charges.
Preferably, first power supply unit further includes photovoltaic electricity-fetching module and solar panel, and the photovoltaic takes electricity
Module can provide the electric energy to generate electricity by the solar panel to power supply for data acquisition device work and supply
It answers, and can be charged by the charging module to the rechargeable battery.
Preferably, the acquisition unit includes signal acquisition sensor and analog signal conditioning circuit, the signal acquisition
Sensor for acquiring voltage signal and current signal on power transmission line in real time, and the analog signal conditioning circuit will be for that will acquire
To simulation voltage signal and current signal amplify processing.
Preferably, the data converging device includes the second data processing unit, the second data storage cell and the second nothing
Line communication unit,
Second data processing unit is used to receive the control instruction of the Data Control Center, and can be according to the control
It instructs to send to the data acquisition device and instruct, and classification conjunction can be carried out to the voltage signal and the current signal
And and storage, and can will classification merge after the voltage signal and the current signal be sent in data control
The heart；
Second data storage cell is used for second data processing unit treated the voltage signal and described
Current signal is stored, and the configuration data for the data converging device stores；
Second wireless communication unit for realizing the data converging device and the data acquisition device wireless communication,
And realize the wireless communication and data interaction of the data converging device and the Data Control Center.
Preferably, the data converging device further includes the second power supply unit, second power supply unit respectively with it is described
Second data processing unit is connected with second wireless communication unit, and second power supply unit is for realizing to the data
The power supply of converging device is supplied.
Preferably, the data converging device further includes shell, and the shell is for installing and fixing the data convergence
The second data processing unit, the second data storage cell, the second wireless communication unit and the second power supply unit of device.
Provided by the present invention for the fault oscillograph system of Travelling Wave Fault Location, acquired in real time by data acquisition device
Voltage and current on power transmission line, and be sent in data control after handling voltage and current by data converging device
The heart, Data Control Center realize transmission line of electricity by carrying out the voltage and current acquired in real time in fault location algorithm to calculate
Accurate fault location, the fault oscillograph system for being used for Travelling Wave Fault Location provided by the invention have precision high, reliable
Property high and accurate ranging feature.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram provided by the present invention for the fault oscillograph system of Travelling Wave Fault Location.
Fig. 2 shows for the specific embodiment structure of the fault oscillograph system provided by the present invention for Travelling Wave Fault Location
It is intended to.
Fig. 3 is the structural schematic diagram of data acquisition device provided by the invention.
Fig. 4 is the structural schematic diagram of data converging device provided by the invention.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
As one aspect of the present invention, a kind of fault oscillograph system for Travelling Wave Fault Location is provided, wherein such as
Shown in Fig. 1, the fault oscillograph system 10 for Travelling Wave Fault Location includes: data acquisition device 110, data convergence dress
120 and Data Control Center 130 are set, the data acquisition device 110 is mounted on power transmission line, the data converging device 120
It is mounted on shaft tower, the data acquisition device 110 and the data converging device 120 communication connection, the data convergence dress
120 and the communication connection of the Data Control Center 130 are set,
The data acquisition device 110 can acquire voltage signal and current signal on power transmission line in real time, and can will acquire
To the voltage signal and current signal handled after be sent to the data converging device 120, the data convergence dress
The control instruction of the Data Control Center 130 can be received by setting 120, and can be adopted according to the control instruction to the data
Acquisition means 110 send instruction, and classification merging and storage can be carried out to the voltage signal and the current signal, and energy
The voltage signal and the current signal after enough merging by classification are sent to the Data Control Center 130, the data
The voltage signal and the current signal can be loaded onto and carry out calculating in Travelling Wave Fault Location algorithm by control centre 130
The position occurred to failure.
Provided by the present invention for the fault oscillograph system of Travelling Wave Fault Location, acquired in real time by data acquisition device
Voltage and current on power transmission line, and be sent in data control after handling voltage and current by data converging device
The heart, Data Control Center realize transmission line of electricity by carrying out the voltage and current acquired in real time in fault location algorithm to calculate
Accurate fault location, the fault oscillograph system for being used for Travelling Wave Fault Location provided by the invention have precision high, reliable
Property high and accurate ranging feature.
It should be understood that have A, B and C three-phase on the power transmission line, therefore, the data acquisition device 110 includes the
One data acquisition device, the second data acquisition device and third data acquisition device, first data acquisition device are mounted on
In the A phase of power transmission line, second data acquisition device is mounted in the B phase of power transmission line, the third data acquisition device peace
In the C phase of power transmission line, first data acquisition device is used to acquire voltage signal and electric current letter in the A phase of power transmission line
Number, second data acquisition device is used to acquire the voltage signal and current signal in the B phase of power transmission line, the third data
Acquisition device is used to acquire the voltage signal and current signal in the C phase of power transmission line.
As shown in Fig. 2, for the specific embodiment structural schematic diagram of the fault oscillograph system for Travelling Wave Fault Location,
The data acquisition device is mounted on A, B, C three-phase of power transmission line, carries out recording and data storage.The data converging device peace
It above shaft tower or near shaft tower, carries out wireless communication with data acquisition device, while being carried out far with Data Control Center
Cheng Tongxin.
Specifically, as shown in figure 3, the data acquisition device 110 includes signal acquisition unit 111, AD conversion unit
112, clock synchronization unit 113, the first data processing unit 114, the first data storage cell 115 and the first wireless communication unit
116,
The signal acquisition unit 111 for acquiring voltage signal and current signal on power transmission line in real time；
The voltage signal and current signal analog-to-digital conversion that the AD conversion unit 112 is used to simulate, obtain digitized electricity
Press signal and current signal；
The clock synchronization unit 113 is used to carry out time service to the data acquisition device to obtain timestamp；
First data processing unit 114 is used to close the timestamp after digitized voltage signal and current signal and time service
And it is handled, and control instruction for sending to the data converging device carries out processing and response；
First data storage cell 115 is used to believe first data processing unit treated voltage signal and electric current
It number is stored；
First wireless communication unit 116 is for realizing the nothing between the data acquisition device and the data converging device
Line communication.
It should be noted that the clock synchronization unit 113 adopts data by the way of GPS time service or wireless time service
Acquisition means 110 carry out time service.
It should also be noted that, first wireless communication unit 116 includes but is not limited to the communication such as WiFi, 2.4GHz
Mode.
Specifically, the clock synchronization unit 113 uses GPS electric system synchronised clock to provide for entire oscillograph system
Accurate synchronization time.It can choose the NEO-M8 module of u-blox company, it has RS232 interface, while also having second arteries and veins
Synchronization signal is rushed, accurate time frequency dividing can be carried out.It supports the location technologies such as GPS, Beidou simultaneously, is provided for fault oscillograph
Accurate position data.
Specifically, in order to realize the work of the data acquisition device, the data acquisition device 110 further includes the first confession
Electric unit 117, first power supply unit 117 respectively with the clock synchronization unit 113, the first data processing unit 115 and
The connection of first wireless communication unit 116, first power supply unit 117 are used to mention for the work of the data acquisition device 110
Power supply source supply.
Further specifically, first power supply unit 117 includes CT electricity-fetching module, CT coil, charging module and charging
Battery, the CT electricity-fetching module are mounted on the power transmission line by the CT coil, and the CT electricity-fetching module can will be from institute
It states the electric energy obtained on power transmission line and provides power supply supply for data acquisition device work, and the charging mould can be passed through
Block charges to the rechargeable battery.
Further specifically, first power supply unit 117 further includes photovoltaic electricity-fetching module and solar panel, described
The electric energy to be generated electricity by the solar panel can be that data acquisition device work mentions by photovoltaic electricity-fetching module
Power supply source supply, and can be charged by the charging module to the rechargeable battery.
Specifically, the CT electricity-fetching module is mounted on power transmission line by CT coil, is carried out by the principle of Current Mutual Inductance
Electricity is taken, data acquisition device 110 is powered and is accessed charging module to charging by rectification circuit and voltage regulator circuit realization
Battery charges.The photovoltaic electricity-fetching module carries out photovoltaic power generation by the solar panel being mounted on crust of the device,
Charging module is powered and accessed to data acquisition device by DC-DC Voltage stabilizing module to charge to rechargeable battery.It is described
Rechargeable battery is the reserve battery of data acquisition device 110, when generation power outage and photovoltaic take electric when not being able to satisfy condition pairs
Data acquisition device is powered, and guarantees what data converging device can record data acquisition device after power outage occurs
Data are recalled.
Preferably, the acquisition unit 111 includes signal acquisition sensor and analog signal conditioning circuit, and the signal is adopted
Collect sensor for acquiring voltage signal and current signal on power transmission line in real time, the analog signal conditioning circuit will be for that will adopt
The voltage signal and current signal of the simulation collected amplify processing.
Specifically, the signal acquisition sensor includes tunnel magneto resistance sensor, fibre optical sensor (such as light CT), Roche
Coil and electronic type CT etc..The analog voltage signal of acquisition and analog current signal are carried out signal and put by the signal conditioning circuit
Greatly, so that its input for meeting A/D converting unit.
Specifically, the data acquisition device 110 further includes shell mechanism, the shell knot of the data acquisition device 110
Structure is used to install and each unit and module of fixed data acquisition device, and data acquisition device is mounted on power transmission line,
The voltage data and current data of power transmission line are acquired.
As the specific embodiment of the data converging device 120, as shown in figure 4, the data converging device 120 wraps
The second data processing unit 121, the second data storage cell 122 and the second wireless communication unit 123 are included,
Second data processing unit 121 is used to receive the control instruction of the Data Control Center, and can be according to described
Control instruction sends to the data acquisition device 110 and instructs, and can to the voltage signal and the current signal into
Row classification merge and storage, and can will classification merge after the voltage signal and the current signal be sent to the data
Control centre；
Second data storage cell 122 is used for second data processing unit 121 treated the voltage signal
It is stored with the current signal, and the configuration data for the data converging device 120 stores；
Second wireless communication unit 123 is for realizing the data converging device 120 and the data acquisition device 110
Wireless communication, and realize that the data converging device 120 and the wireless communication and data of the Data Control Center 130 are handed over
Mutually.
It should be noted that the communication packet of second wireless communication unit 123 and data acquisition device 110
Include but be not limited to the communication modes such as WiFi, 2.4GHz, second wireless communication unit 123 and Data Control Center 130
Communication includes but is not limited to the communication modes such as 4G, 5G, WiFi.
Specifically, the data converging device 120 further includes the second power supply unit 124, and second power supply unit 124 divides
It is not connect with second data processing unit 121 and second wireless communication unit 123, second power supply unit 124
For realizing the power supply supply to the data converging device 120.
Further specifically, the second power supply unit 124 of the data converging device 120 includes 220V Alternating Current Power Supply, light
Lie prostrate electricity-fetching module, charging module and rechargeable battery.The 220V Alternating Current Power Supply refers to the data being mounted near shaft tower convergence dress
Set and have access to 220V alternating current, the 220V alternating current of access is depressured, rectify and pressure stabilizing realize to data converging device
120 power supply and access charging module charge to rechargeable battery.The photovoltaic electricity-fetching module, which refers to use, is mounted on shell
The solar panel of outside generates electricity, and fills by the realization of DC-DC reduction voltage circuit to the power supply and access of data converging device
Electric module charges to rechargeable battery.The rechargeable battery is the reserve battery of data converging device, when generation power outage
Electricity is taken to be powered when not being able to satisfy condition to data converging device with photovoltaic, guaranteeing can be certain after power outage occurs
Continue to carry out data interaction with Data Control Center in time.
Specifically, the data converging device further includes shell, and the shell is for installing and fixing the data convergence
The second data processing unit, the second data storage cell, the second wireless communication unit and the second power supply unit of device.
It is understood that the shell mechanism of the data converging device 120 is for installing and fixed data converging device
Modules and unit, and data converging device 120 is fixed, it is made to be mounted on the pedestal near shaft tower or shaft tower
On.
Specifically, as shown in Fig. 2, the fault oscillograph system provided by the present invention for Travelling Wave Fault Location is adopted by data
Acquisition means and data converging device composition, wherein in each node install three data acquisition devices acquire respectively power transmission line A,
B, the fault data of C three-phase, one data converging device of each node installation are used to carry out data friendship with Data Control Center
Mutually and to the data of three data acquisition devices carry out convergence and fusion treatment.
Specifically, data acquisition device for acquiring transient state travelling wave electric current, transient state travelling wave voltage, stable state power current in real time
With stable state power-frequency voltage.The data of acquisition are merged and stored with the clock data of clock synchronization unit.
Specifically, data converging device is used to that the data of the data acquisition device of three child nodes to be converged and be merged
Processing, sends Data Control Center for fused data when Data Control Center call back data, and receive data control
The control instruction at center carries out long-range control and system upgrade etc..
Needed after electric power accident occurs for power transmission line to the fault information data of node each on the route that accident occurs into
Row is recalled, and the data converging device of each node will be sent to data after the data fusion of the data acquisition device of corresponding child node
Control centre, Data Control Center run Travelling Wave Fault Location algorithm, realize the accurate positioning to fault point.
Data friendship is carried out by the way of WiFi, 2.4GHz wireless communication between data acquisition device and data converging device
Mutually.
The working principle of the fault oscillograph system provided by the present invention for Travelling Wave Fault Location is carried out below detailed
Explanation.The data acquisition device of fault oscillograph system for Travelling Wave Fault Location is able to record the transient fault electricity of power transmission line
Corrugating and transient fault current waveform.The transient fault voltage waveform and transient fault current waveform, which refers to, passes through data
On acquisition device sensor acquisition power transmission line voltage signal and current signal by conditioning circuit, A/D converting unit, when
Digital waveform after clock synchronization unit and data processing unit processes is voltage waveform and current waveform after line fault.This
What invention provided includes three data acquisition device difference for each node of the fault oscillograph system of Travelling Wave Fault Location
It is mounted on A, B, C three-phase of power transmission line, the data of three data acquisition devices are converged including a data converging device
And fusion treatment.The time synchronization that there is each data acquisition device clock synchronization unit to realize entire oscillograph.In number
Heart operation Travelling Wave Fault Location algorithm recalls all nodes to break down on route after power line power accident occurs
The accurate fault location of transmission line of electricity may be implemented by the Travelling Wave Fault Location algorithm of operation in the data of fault oscillograph.Its
Travelling Wave Fault Location algorithm uses transient state travelling wave location algorithm, has the characteristics that high reliablity, ranging are accurate, specifically, transient state
The step of Travelling Wave Fault Location includes:
(1) the three-phase transient fault voltage waveform of all nodes of faulty line is recalled by Data Control Center；
(2) the three-phase transient fault current waveform of all nodes of faulty line is recalled by Data Control Center；
(3) according to the three-phase transient fault electric current recalled, fault location is carried out using transient state travelling wave telemetry；
Both-end transient state travelling wave location algorithm is to calculate abort situation by calculating the time difference at fault traveling wave arrival route both ends,
Failure is accurately calculated by calculating the time difference of fault traveling wave arrival route both ends fault oscillograph node in the present invention
Position.Its mathematical formulae are as follows:
L1=(L- (T2-T1) V)/2,
L2=(L- (T1-T2) V)/2,
Wherein, L indicates the distance between two fault oscillograph nodes, and L1, L2 indicate fault point to both ends fault oscillograph node
Distance, T1, T2 indicate traveling wave reach fault oscillograph time, V indicate traveling wave spread speed, the row of special transmission route
Wave velocity is the constant close to the light velocity.
(4) accurate positioning of faulty line fault point is realized by the algorithm of step (3).
Therefore, provided by the present invention for the fault oscillograph system of Travelling Wave Fault Location, after being able to record that failure occurs
Transient-wave, according to the transient-wave recorded using traveling wave method fault location technology accurately calculate distribution line therefore
Barrier position and obtain transient fault information, at the same can for develop and test the novel relay protection based on transient fault information and
Fault location device provides fault data, to meet the following requirements at the higher level to fault oscillograph device.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110836991A (en) * | 2019-12-17 | 2020-02-25 | 国网辽宁省电力有限公司鞍山供电公司 | Fault recorder capable of working in delayed mode and waveform recording and reproducing method thereof |
| CN111257700A (en) * | 2020-03-31 | 2020-06-09 | 国网江苏省电力有限公司无锡供电分公司 | Power distribution network single-phase earth fault positioning device and method based on edge calculation |
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| CN110836991A (en) * | 2019-12-17 | 2020-02-25 | 国网辽宁省电力有限公司鞍山供电公司 | Fault recorder capable of working in delayed mode and waveform recording and reproducing method thereof |
| CN111257700A (en) * | 2020-03-31 | 2020-06-09 | 国网江苏省电力有限公司无锡供电分公司 | Power distribution network single-phase earth fault positioning device and method based on edge calculation |
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Application publication date: 20190104 |