CN106443540A - Traveling wave single-terminal distance measurement device test method based on simulation data - Google Patents
Traveling wave single-terminal distance measurement device test method based on simulation data Download PDFInfo
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- CN106443540A CN106443540A CN201610803285.1A CN201610803285A CN106443540A CN 106443540 A CN106443540 A CN 106443540A CN 201610803285 A CN201610803285 A CN 201610803285A CN 106443540 A CN106443540 A CN 106443540A
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- 238000004088 simulation Methods 0.000 title claims abstract description 22
- 238000010998 test method Methods 0.000 title claims abstract description 8
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- 238000004458 analytical method Methods 0.000 description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Abstract
The invention relates to a traveling wave single-terminal distance measurement device test method based on simulation data, and belongs to the technical field of electric power system relay protection. As for a power transmission line, a traveling wave distance measurement device is only installed in a transformer substation connected with the side of a bus. A power transmission line model is established through electric power system simulation software according to the actual operation situation of the power transmission line so that different fault types and different fault locations of fault simulation waveforms are acquired; then the edited simulation waveforms pass through a high-power high-speed signal generator to output fault waveforms to the traveling wave distance measurement device; and the traveling wave distance measurement device records the fault waveforms and then calculates the fault distance. If the traveling wave distance measurement device can start, the wave recording starting function is qualified, or the wave recording starting function is unqualified; and distance measurement is performed on the basis of the qualified wave recording function, and the distance measurement result is accurate if the distance measurement result is within the error range, or the distance measurement parameters require to be adjusted or the 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 technology
With traveling wave fault location device promoting the use of in 220kV and above power transmission network, device range finding reliable, accurate
Really also increasingly receive publicity.Because failed row wave source is complicated, traveling wave acquisition principle and mounting means are diversified, and it is right to be currently difficult to
The traveling wave fault location device of in-site installation operation carries out before more, the test of system, seriously limits traveling wave fault
The efficient O＆M of range unit, leads to the operational reliability of traveling wave fault location device not high, greatly governs range finding 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 startup test, domestic not yet forms unification to the method for testing and means of this device.
Content of the invention
The technical problem to be solved in the present invention is to propose a kind of traveling wave single end distance measurement device to test side based on emulation data
Method is it is therefore an objective to for the basic function of traveling wave single end distance measurement device, Adaptability Analysis, test of dispatching from the factory, making regular check on and overhaul
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 with bus side in the transformer station being only connected.By power system simulation software according to
The actual motion present situation of transmission line of electricity sets up model of power transmission system, obtains different faults type and the fault of different faults position is imitated
True waveform；Then the simulation waveform after editor is exported fault waveform by Large-power High-Speed signal generator to fill to travelling wave ranging
Put；Fault distance is calculated after traveling wave ranging device record this fault waveform lower.If traveling wave ranging device can start, illustrate that recording ripple starts
Function is qualified, and otherwise record ripple startup function is unqualified；Found range on the basis of record wave energy is qualified, range measurement is in error
In the range of explanation range measurement accurately, otherwise need to adjust ranging parameters or range measurement be unreliable.
Comprise the following steps that：
(1) set up model of power transmission system：For improving the reliability to traveling wave fault location device to test, need to set up and can describe
Actual traveling wave produces the analogue system with communication process, realizes omnibearing emulation as much as possible.Then mainly set up power transmission line
Road model, Tower Model；Additionally, also needing to set up the model of transformer, the long cable model of secondary side, secondary load model etc..
1. circuit model：Set up Double-End Source single back line analogue system, the bus on the left of circuit adopts 3/2 wiring side
Formula, the bus on the right side of circuit is using single mother's connection type；Transmission line of electricity adopts " frequency dependent model " mould
Type, shown in the expression formula such as formula (1) of transmission line malfunction traveling wave propagation equation and traveling wave attenuation characteristic and speed characteristics：
In formula,For electric transmission line current traveling-wave, to x positive direction propagate current traveling wave
Component and the current traveling wave component propagated to x negative direction；X is the distance away from measuring end for the trouble point, and w is the angular frequency of fault traveling wave
Rate,It is the integral constant with regard to x；K=0,1 represent zero modulus of fault traveling wave and line modulus respectively；
K line wavelength-division coefficient of discharge for angular frequency w.
2. Tower Model：In fault simulation, accurate simulation Tower Model occupies critical role, and conventional Tower Model has
Following three kinds：Lumped inductance model, single multi-wave impedance model, multi-wave impedance model；In view of natural impedance in actual motion with
The difference of tower structure and change, and fault traveling wave traveling in shaft tower can occur catadioptric, and shaft tower adopts many wave resistances then
Anti- model is simulated, and circuit adopts conductors on quad bundled, and shaft tower face shaping adopts wine glass-shaped shaft tower, so that analogue system is more
Close to actual operating state.
(2) obtain fault simulation waveform：Using power system simulation software according to the transmission line of electricity mould set up 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 is (such as：Closely
End fault, near peer failure and centre position fault etc.) fault simulation waveform, and simulation waveform is generated comtrade
The data file of form.
(3) Large-power High-Speed signal generator output：The data file generating comtrade form is passed through traveling wave fault
Range unit Large-power High-Speed signal generator output fault waveform is to traveling wave ranging device.
(4) traveling wave single end distance measurement device to test：If traveling wave ranging device can start, illustrate that record ripple startup function is qualified, no
Then record ripple startup function is unqualified；Found range on the basis of record wave energy is qualified, range measurement explanation in range of error
Range measurement accurately, otherwise needs to adjust ranging parameters or range measurement is unreliable.
The invention has the beneficial effects as follows：It is applied to the test of theory analysis, basic function, and the adaptability of device is divided
Analysis, test of dispatching from the factory, make regular check on and overhaul；Additionally, the method the factor such as is not changed by fault instantaneity and fault resstance
Impact, result of calculation is accurately and reliably.
Brief description
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.
A kind of traveling wave single end distance measurement device test method based on emulation data, for transmission line of electricity, only with bus one
Traveling wave ranging device is installed in the transformer station that side is connected, existing according to the actual motion of transmission line of electricity by power system simulation software
Shape sets up model of power transmission system, obtains the fault simulation waveform of different faults type and different faults position；Then after editing
Simulation waveform by Large-power High-Speed signal generator export fault waveform to traveling wave ranging device；Under traveling wave ranging device record
Calculate fault distance after this fault waveform, if traveling wave ranging device can start, illustrate that record ripple startup function is qualified, otherwise record ripple opens
Dynamic function is unqualified；Found range on the basis of record wave energy is qualified, range measurement illustrates range measurement in range of error
Accurately, otherwise need to adjust ranging parameters or range measurement is inaccurate.
Concretely comprise the following steps：
(1) set up model of power transmission system：For improving the accuracy to traveling wave fault location device to test, set up and can describe in fact
Border traveling wave produce and communication process Double-End Source single back line analogue system, including set up model of power transmission system, Tower Model,
The long cable model of the model of transformer, secondary side, secondary load model；
1. circuit model：Set up Double-End Source single back line analogue system, the bus on the left of circuit adopts 3/2 wiring side
Formula, the bus on the right side of circuit is using single mother's connection type；Transmission line of electricity adopts " frequency dependent model " mould
Type, shown in the expression formula such as formula (1) of transmission line malfunction traveling wave propagation equation and traveling wave attenuation characteristic and speed characteristics：
In formula,For electric transmission line current traveling-wave, to x positive direction propagate current traveling wave
Component and the current traveling wave component propagated to x negative direction；X is the distance away from measuring end for the trouble point, and w is the angular frequency of fault traveling wave
Rate,It is the integral constant with regard to x；K=0,1 represent zero modulus of fault traveling wave and line modulus respectively；
K line wavelength-division coefficient of discharge for angular frequency w；
2. Tower Model：Shaft tower adopts multi-wave impedance model to be simulated, and circuit adopts conductors on quad bundled, shaft tower outward appearance shape
Shape adopts wine glass-shaped shaft tower；
(2) obtain fault simulation waveform：Using power system simulation software according to the transmission line of electricity mould set up in step (1)
Type, obtains the fault simulation waveform of different faults type and different faults position, and simulation waveform is generated comtrade form
Data file；
(3) Large-power High-Speed signal generator output：The data file generating comtrade form is passed through traveling wave fault
Range unit Large-power High-Speed signal generator output fault waveform is to traveling wave ranging device；
(4) traveling wave single end distance measurement device to test：If traveling wave ranging device can start, illustrate that record ripple startup function is qualified, no
Then record ripple startup function is unqualified；Found range on the basis of record wave energy is qualified, range measurement explanation in range of error
Range measurement accurately, otherwise needs to adjust ranging parameters or range measurement is unreliable.
Embodiment 1：Set up Double-End Source 500kV single back line analogue system, 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 bus M side adopts 3/2 mode of connection, and circuit MN is complete
A length of 200km.Using above-mentioned model, breaking down at bus M side 5km, 0 ohm of transition resistance, the initial phase angle of fault 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, meets in range of error and requires.
Embodiment 2：Set up Double-End Source 500kV single back line analogue system, 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 bus M side adopts 3/2 mode of connection, and circuit MN is complete
A length of 200km.Using above-mentioned model, breaking down at bus M side 400km, 0 ohm of transition resistance, fault 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, meets in range of error and requires.
Above in association with accompanying drawing, the specific embodiment of the present invention is explained in detail, but the present invention be not limited to above-mentioned
Embodiment, in the ken that those of ordinary skill in the art possess, can also be before without departing from present inventive concept
Put that various changes can be made.
Claims (2)
1. a kind of based on emulation data traveling wave single end distance measurement device test method it is characterised in that：For transmission line of electricity, only
Traveling wave ranging device is installed, by power system simulation software according to the reality of transmission line of electricity in the transformer station being connected with bus side
Border is run present situation and is set up model of power transmission system, obtains the fault simulation waveform of different faults type and different faults position；Then
Simulation waveform after editor is exported fault waveform to traveling wave ranging device by Large-power High-Speed signal generator；Travelling wave ranging
Calculate fault distance after device record this fault waveform lower, if traveling wave ranging device can start, illustrate that record ripple startup function is qualified, no
Then record ripple startup function is unqualified；Found range on the basis of record wave energy is qualified, range measurement explanation in range of error
Range measurement accurately, otherwise needs to adjust ranging parameters or range measurement is inaccurate.
2. the traveling wave single end distance measurement device test method based on emulation data according to claim 1 is it is characterised in that have
Body step is：
(1) set up model of power transmission system：For improving the accuracy to traveling wave fault location device to test, set up and can describe actual row
Ripple produce and communication process Double-End Source single back line analogue system, including setting up model of power transmission system, Tower Model, mutual inductance
The long cable model of the model of device, secondary side, secondary load model；
1. circuit model：Set up Double-End Source single back line analogue system, the bus on the left of circuit adopts 3/2 mode of connection, line
Bus on the right side of road is using single mother's connection type；Transmission line of electricity adopts " 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, to x positive direction propagate current traveling wave component
With the current traveling wave component propagated to x negative direction；X is the distance away from measuring end for the trouble point, and w is the angular frequency of fault traveling wave,It is the integral constant with regard to x；K=0,1 represent zero modulus of fault traveling wave and line modulus respectively；For angle
The k line wavelength-division coefficient of discharge of frequency w；
2. Tower Model：Shaft tower adopts multi-wave impedance model to be simulated, and circuit adopts conductors on quad bundled, and shaft tower face shaping is adopted
Use wine glass-shaped shaft tower；
(2) obtain fault simulation waveform：Using power system simulation software according to the model of power transmission system set up in step (1),
Obtain the fault simulation waveform of different faults type and different faults position, and simulation waveform is generated the number of comtrade form
According to file；
(3) Large-power High-Speed signal generator output：The data file generating comtrade form is passed through traveling wave fault location
Device Large-power High-Speed signal generator output fault waveform is to traveling wave ranging device；
(4) traveling wave single end distance measurement device to test：If traveling wave ranging device can start, illustrate that record ripple startup function is qualified, otherwise record
Ripple startup function is unqualified；Found range on the basis of record wave energy is qualified, range measurement illustrates to find range in range of error
Result accurately, otherwise needs to adjust ranging parameters or range measurement is unreliable.
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Cited By (5)
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| CN108427089A (en) * | 2018-03-22 | 2018-08-21 | 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 | A kind of test system and method for non-contact distributed range-measurement system |
| CN108693446A (en) * | 2018-05-25 | 2018-10-23 | 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 |
| CN108845229A (en) * | 2018-05-31 | 2018-11-20 | 南方电网科学研究院有限责任公司 | A kind of traveling wave ranging device starting reliability calculation method |
| 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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