CN106443540B - A kind of traveling wave single end distance measurement device test method based on emulation data - Google Patents
A kind of traveling wave single end distance measurement device test method based on emulation data Download PDFInfo
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- CN106443540B CN106443540B CN201610803285.1A CN201610803285A CN106443540B CN 106443540 B CN106443540 B CN 106443540B CN 201610803285 A CN201610803285 A CN 201610803285A CN 106443540 B CN106443540 B CN 106443540B
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Abstract
The present invention relates to a kind of traveling wave single end distance measurement device test method based on emulation data, Relay Protection Technology in Power System fields.For transmission line of electricity, traveling wave ranging device is installed in the substation that is only connected with bus side.Model of power transmission system is established according to the actual motion status of transmission line of electricity by power system simulation software, obtains the fault simulation waveform of different faults type and different faults position；Then edited simulation waveform is exported into fault waveform to traveling wave ranging device by Large-power High-Speed signal generator；Traveling wave ranging device calculates fault distance after recording the lower fault waveform.If traveling wave ranging device can start, illustrate that recording startup function is qualified, otherwise recording startup function is unqualified；Ranging is carried out on the basis of recording function is qualified, distance measurement result illustrates that distance measurement result is accurate in error range, otherwise needs to adjust ranging parameters or distance measurement result is unreliable.
Description
Technical field
The present invention relates to a kind of traveling wave single end distance measurement device test method based on emulation data, relay protection of power system
Technical field.
Background technique
As traveling wave fault location device is in the popularization and use of 220kV and the above power transmission network, device ranging it is reliable, quasi-
Really also more and more attention has been paid to.Since failed row wave source is complicated, traveling wave acquisition principle and mounting means diversification are currently difficult to pair
In-site installation and the traveling wave fault location device run carry out the test of more front, system, seriously limit traveling wave fault
The efficient O&M of range unit, causes the operational reliability of traveling wave fault location device not high, greatly restricts ranging quality
Improve.So far, the test to traveling wave fault device and evaluation are concentrated mainly on test and letter based on offline digital simulation
Single starting test, it is domestic that unification not yet is formed to the test method of the device and means.
Summary of the invention
The technical problem to be solved by the present invention is to propose a kind of traveling wave single end distance measurement device to test side based on emulation data
Method, it is therefore an objective to test, inspect periodically and overhaul for the basic function of traveling wave single end distance measurement device, Adaptability Analysis, factory etc.
Test.
The technical scheme is that a kind of traveling wave single end distance measurement device test method based on emulation data, for defeated
Electric line installs traveling wave ranging device in the substation being only connected with bus side.By power system simulation software according to
The actual motion status of transmission line of electricity establishes model of power transmission system, and the failure for obtaining different faults type and different faults position is imitative
True waveform；Then edited simulation waveform fault waveform to travelling wave ranging is exported by Large-power High-Speed signal generator to fill
It sets；Traveling wave ranging device calculates fault distance after recording the lower fault waveform.If traveling wave ranging device can start, illustrate that recording starts
Function is qualified, and otherwise recording startup function is unqualified；Ranging is carried out on the basis of recording function is qualified, distance measurement result is in error
Illustrate that distance measurement result is accurate in range, otherwise needs to adjust ranging parameters or distance measurement result is unreliable.
Specific step is as follows:
(1) establish model of power transmission system: to improve the reliability to traveling wave fault location device to test, need to establish can be described
Practical traveling wave generates and the analogue system of communication process, realizes comprehensive emulation as much as possible.Then power transmission line is mainly established
Road model, Tower Model；In addition, also needing to establish the long cable model of model, secondary side, secondary load model of mutual inductor etc..
1. circuit model: establishing Double-End Source single back line analogue system, the bus on the left of route uses 3/2 wiring side
Formula, the bus on the right side of route is using single female connection type；Transmission line of electricity uses " frequency dependent model " mould
Shown in the expression formula such as formula (1) of type, transmission line malfunction traveling wave propagation equation and traveling wave attenuation characteristic and speed characteristics:
In formula,For electric transmission line current traveling-wave, the current traveling wave propagated to x positive direction
Component and the current traveling wave component propagated to x negative direction；X is distance of the fault point away from measuring end, and w is the angular frequency of fault traveling wave
Rate,For the integral constant about x；Zero modulus and linear modulus that k=0,1 respectively indicate fault traveling wave；
For the k line wavelength-division coefficient of discharge of angular frequency w.
2. Tower Model: accurate simulation Tower Model occupies an important position in fault simulation, and common Tower Model has
Following three kinds: lumped inductance model, single multi-wave impedance model, multi-wave impedance model；In view of in actual motion wave impedance with
The difference of tower structure and change, and fault traveling wave is advanced in shaft tower that catadioptric can occur, and then shaft tower uses more wave resistances
Anti- model is simulated, and route uses conductors on quad bundled, and shaft tower face shaping uses wine glass-shaped shaft tower, to make analogue system more
Close to actual operating state.
(2) fault simulation waveform is obtained: using power system simulation software according to the transmission line of electricity mould established in step (1)
Type obtains different faults type (such as: singlephase earth fault, phase to phase fault and three-phase fault) and different faults position (such as: close
Hold failure, close to peer failure and middle position failure etc.) fault simulation waveform, and simulation waveform is generated comtrade
The data file of format.
(3) Large-power High-Speed signal generator exports: the data file for generating comtrade format is passed through traveling wave fault
Range unit Large-power High-Speed signal generator exports fault waveform to traveling wave ranging device.
(4) traveling wave single end distance measurement device to test: if traveling wave ranging device can start, illustrating that recording startup function is qualified, no
Then recording startup function is unqualified；Ranging is carried out on the basis of recording function is qualified, distance measurement result illustrates in error range
Distance measurement result is accurate, otherwise needs to adjust ranging parameters or distance measurement result is unreliable.
The beneficial effects of the present invention are: being suitable for the test of theory analysis, basic function, and to the adaptability point of device
Analysis, is inspected periodically and is overhauled factory test；In addition, the method is not by the factors such as failure instantaneity and fault resstance variation
It influences, calculated result is accurate and reliable.
Detailed description of the invention
Fig. 1 is traveling wave single end distance measurement device to test structure chart of the present invention；
Fig. 2 is the simulation architecture figure of transmission line of electricity MN of the present invention；
Fig. 3 is Tower Model of the present invention；
Fig. 4 is the three-phase fault current traveling wave figure of the embodiment of the present invention 1；
Fig. 5 is the three-phase fault current traveling wave figure of the embodiment of the present invention 2.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
It is a kind of based on emulation data traveling wave single end distance measurement device test method, for transmission line of electricity, only with bus one
Traveling wave ranging device is installed in the connected substation in side, it is existing according to the actual motion of transmission line of electricity by power system simulation software
Shape establishes model of power transmission system, obtains the fault simulation waveform of different faults type and different faults position；Then after editing
Simulation waveform fault waveform is exported to traveling wave ranging device by Large-power High-Speed signal generator；Under traveling wave ranging device record
Fault distance is calculated after the fault waveform, if traveling wave ranging device can start, illustrates that recording startup function is qualified, otherwise recording opens
Dynamic function is unqualified；Ranging is carried out on the basis of recording function is qualified, distance measurement result illustrates distance measurement result in error range
Accurately, otherwise need to adjust ranging parameters or distance measurement result inaccuracy.
Specific steps are as follows:
(1) establish model of power transmission system: to improve the accuracy to traveling wave fault location device to test, foundation can describe real
Border traveling wave generate and communication process Double-End Source single back line analogue system, including establish model of power transmission system, Tower Model,
The long cable model of model, secondary side, the secondary load model of mutual inductor；
1. circuit model: establishing Double-End Source single back line analogue system, the bus on the left of route uses 3/2 wiring side
Formula, the bus on the right side of route is using single female connection type；Transmission line of electricity uses " frequency dependent model " mould
Shown in the expression formula such as formula (1) of type, transmission line malfunction traveling wave propagation equation and traveling wave attenuation characteristic and speed characteristics:
In formula,For electric transmission line current traveling-wave, the current traveling wave propagated to x positive direction
Component and the current traveling wave component propagated to x negative direction；X is distance of the fault point away from measuring end, and w is the angular frequency of fault traveling wave
Rate,For the integral constant about x；Zero modulus and linear modulus that k=0,1 respectively indicate fault traveling wave；
For the k line wavelength-division coefficient of discharge of angular frequency w；
2. Tower Model: shaft tower is simulated using multi-wave impedance model, and route uses conductors on quad bundled, shaft tower appearance shape
Shape uses wine glass-shaped shaft tower；
(2) fault simulation waveform is obtained: using power system simulation software according to the transmission line of electricity mould established in step (1)
Type obtains the fault simulation waveform of different faults type and different faults position, and simulation waveform is generated comtrade format
Data file；
(3) Large-power High-Speed signal generator exports: the data file for generating comtrade format is passed through traveling wave fault
Range unit Large-power High-Speed signal generator exports fault waveform to traveling wave ranging device；
(4) traveling wave single end distance measurement device to test: if traveling wave ranging device can start, illustrating that recording startup function is qualified, no
Then recording startup function is unqualified；Ranging is carried out on the basis of recording function is qualified, distance measurement result illustrates in error range
Distance measurement result is accurate, otherwise needs to adjust ranging parameters or distance measurement result is unreliable.
Embodiment 1: establishing Double-End Source 500kV single back line analogue system, and system wiring figure is illustrated in fig. 2 shown below.System
The capacity of short circuit of S1 is 3000MW, and the capacity of short circuit of system S2 is 2000MW, and the side bus M uses 3/2 mode of connection, and route MN is complete
A length of 200km.Using above-mentioned model, break down at away from bus M side 5km, 0 ohm of transition resistance, the initial phase angle of failure A phase
45 degree, bus structure M=3, N=3.
Traveling wave single end distance measurement device records waveform as shown in figure 4, traveling wave single end distance measurement device exports fault distance automatically is
4.8km is met the requirements in error range.
Embodiment 2: establishing Double-End Source 500kV single back line analogue system, and system wiring figure is illustrated in fig. 2 shown below.System
The capacity of short circuit of S1 is 3000MW, and the capacity of short circuit of system S2 is 2000MW, and the side bus M uses 3/2 mode of connection, and route MN is complete
A length of 200km.Using above-mentioned model, break down at away from bus M side 400km, 0 ohm of transition resistance, failure A phase initial phase
45 degree of angle, bus structure M=3, N=3.
Traveling wave single end distance measurement device records waveform as shown in figure 5, traveling wave single end distance measurement device exports fault distance automatically is
200.4km meeting the requirements in error range.
In conjunction with attached drawing, the embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (1)
1. a kind of traveling wave single end distance measurement device test method based on emulation data, it is characterised in that: for transmission line of electricity, only
Traveling wave ranging device is installed in the substation being connected with bus side, by power system simulation software according to the reality of transmission line of electricity
Border operation status establishes model of power transmission system, obtains the fault simulation waveform of different faults type and different faults position；Then
Edited simulation waveform is exported into fault waveform to traveling wave ranging device by Large-power High-Speed signal generator；Travelling wave ranging
Device calculates fault distance after recording the lower fault waveform, if traveling wave ranging device can start, illustrates that recording startup function is qualified, no
Then recording startup function is unqualified；Ranging is carried out on the basis of recording function is qualified, distance measurement result illustrates in error range
Distance measurement result is accurate, otherwise needs to adjust ranging parameters or distance measurement result inaccuracy；
Specific steps are as follows:
(1) establish model of power transmission system: to improve the accuracy to traveling wave fault location device to test, foundation can describe practical row
Wave generates and the Double-End Source single back line analogue system of communication process, including establishes model of power transmission system, Tower Model, mutual inductance
The long cable model of model, secondary side, the secondary load model of device；
1. circuit model: establishing Double-End Source single back line analogue system, the bus on the left of route uses 3/2 mode of connection, line
Bus on the right side of road is using single female connection type；Transmission line of electricity uses " frequency dependent model " model, transmission of electricity
Shown in the expression formula such as formula (1) of line fault traveling wave propagation equation and traveling wave attenuation characteristic and speed characteristics:
In formula,For electric transmission line current traveling-wave, the current traveling wave component propagated to x positive direction
With the current traveling wave component propagated to x negative direction；X is distance of the fault point away from measuring end, and w is the angular frequency of fault traveling wave,For the integral constant about x；Zero modulus and linear modulus that k=0,1 respectively indicate fault traveling wave；For angle
The k line wavelength-division coefficient of discharge of frequency w；
2. Tower Model: shaft tower is simulated using multi-wave impedance model, and route uses conductors on quad bundled, and shaft tower face shaping is adopted
With wine glass-shaped shaft tower；
(2) fault simulation waveform is obtained: the model of power transmission system using power system simulation software according to foundation in step (1),
The fault simulation waveform of different faults type and different faults position is obtained, and simulation waveform is generated the number of comtrade format
According to file；
(3) Large-power High-Speed signal generator exports: the data file for generating comtrade format is passed through traveling wave fault location
Device Large-power High-Speed signal generator exports fault waveform to traveling wave ranging device；
(4) traveling wave single end distance measurement device to test: if traveling wave ranging device can start, illustrate that recording startup function is qualified, otherwise record
Wave startup function is unqualified；Ranging is carried out on the basis of recording function is qualified, distance measurement result illustrates ranging in error range
As a result accurate, it otherwise needs to adjust ranging parameters or distance measurement result is unreliable.
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| CN108427089B (en) * | 2018-03-22 | 2020-07-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Testing system and method of non-contact distributed ranging system |
| CN108693446B (en) * | 2018-05-25 | 2019-05-17 | 中国矿业大学 | A kind of Fault Locating Method of non-synchronous sampling power grid transient state travelling wave modulus time difference |
| CN108845229B (en) * | 2018-05-31 | 2021-07-20 | 南方电网科学研究院有限责任公司 | Method for calculating starting reliability of traveling wave distance measuring device |
| CN111693821A (en) * | 2020-06-19 | 2020-09-22 | 国网浙江省电力有限公司 | Testing method and device for traveling wave fault location device of cable-overhead mixed line |
| CN112285458A (en) * | 2020-09-30 | 2021-01-29 | 国家电网公司华北分部 | Flexible direct current line traveling wave protection testing device |
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