CN106229950A - A kind of intelligent substation integration protection method - Google Patents
A kind of intelligent substation integration protection method Download PDFInfo
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- CN106229950A CN106229950A CN201610830194.7A CN201610830194A CN106229950A CN 106229950 A CN106229950 A CN 106229950A CN 201610830194 A CN201610830194 A CN 201610830194A CN 106229950 A CN106229950 A CN 106229950A
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- 230000010354 integration Effects 0.000 title claims abstract description 43
- 230000008034 disappearance Effects 0.000 claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims description 11
- 230000004888 barrier function Effects 0.000 claims description 9
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- 238000005728 strengthening Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 38
- 238000012217 deletion Methods 0.000 description 10
- 230000037430 deletion Effects 0.000 description 10
- 230000009466 transformation Effects 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Abstract
A kind of intelligent substation integration protection method of the present invention; it is characterized in; utilize the positive sequence fault component current phase feature at fault element two ends, carry out phase bit comparison and constitute fault distinguishing principle, the phase information Judging fault element that combined with intelligent electronic equipment (IED) gathers.When the phase information disappearance that intelligent electronic device (IED) gathers or mistake, expand the phase information in the identification region of intelligent electronic device (IED) and current magnitude information, in conjunction with predetermined action decision-making, remain to excise rapidly fault element.Transformator in intelligent substation, bus, circuit can be made fault element and be differentiated simultaneously, a kind of fault element is only differentiated by different previous methods, and the method is scientific and reasonable, calculate simple, simple and easy to do, it determines accurately, the suitability is strong, highly sensitive, has certain fault-tolerance.
Description
Technical field
The present invention relates to technical field of relay protection, be a kind of intelligent substation integration protection method.
Background technology
Along with rapid economic development, the scale of China's electrical network and complexity expand the most accordingly and promote, the method for operation
Becoming more flexible, the requirement to intelligent substation relay protection is more and more higher, and compared with tradition transformer station, intelligent substation is real
Show full station information digitalization, communications platform networking, information sharing standardization, interoperability can have been conveniently realized.But intelligence
Easily there is the situation of loss of data or error in data in the feature that energy substation information is shared.
Traditional relaying configuration the most no longer adapts to the requirement of power network development, sharing of fault message, has between each protection
These problems that effect cooperation just can exist, utilize many dot informations of transformer station to excise fault with carrying out fast and reliable.
May also take into the impact on system after failure removal simultaneously, and use corresponding control measure impact to be preferably minimized.Cause
This, propose a kind of scientific and reasonable technical method imperative to the problem solving intelligent substation existence.
Summary of the invention
The technical problem to be solved is, overcomes the deficiencies in the prior art, it is provided that a kind of scientific and reasonable, it determines accurate
Really, the suitability is strong, highly sensitive intelligent substation integration protection method.
The technical method solving the employing of its technical problem is, a kind of intelligent substation integration protection method is characterized in that, it
Comprise the steps:
1) utilize the positive sequence fault component current phase feature at fault element two ends, carry out phase bit comparison and constitute fault distinguishing
Principle, the phase information Judging fault element that combined with intelligent electronic equipment (IED) gathers
It is to point to circuit from bus that regulation flows through the positive sequence fault component electric current positive direction of protection；When circuit, bus, transformation
During the internal fault of device generating region, the positive sequence fault current phase at its two ends is little；When there is external area error, its two ends are just
Sequence fault current phase is close to 180 °；Therefore, utilize the phase place feature of positive sequence fault component electric current to distinguish fault and non-
Fault element；The current amplitude of simultaneous faults point is also maximum, and amplitude information is used for strengthening the reliability of phase criterion；
Access line two ends, transformator two ends, bus are on the coupled feeder line in transformator side and mother respectively
Positive sequence fault component electric current carries out phase bit comparison, if current phase is more or less the same, then illustrates to break down in this element road；If electric current
Phase is close to 180 °, then explanation occurs external area error, and criterion is formula (1), formula (2)；
In formula:It is respectively the positive sequence fault component electric current at element two ends；
2) when the phase information disappearance that intelligent electronic device (IED) gathers or mistake, intelligent electronic device (IED) is expanded
The phase information identified in region and current magnitude information, in conjunction with predetermined action decision-making, remain to excise fault unit rapidly
Part；
(1) phase information disappearance
A) transformator side positive sequence fault component current phase disappearance
When the positive sequence fault component current phase of transformator side lacks, by the circuit positive sequence fault of connected for this side bus
Current weight and transformator do not lack the positive sequence fault component electric current of phase place side and make phase bit comparison, it determines whether be transformator event
Barrier, if side tripping transformator opposite side chopper；
B) bus one end positive sequence fault component current phase disappearance
When high voltage bus lacks near the positive sequence fault component current phase of transformer side, by step down side just
The positive sequence fault component electric current on sequence fault component electric current and high-voltage side bus institute's line road makees phase bit comparison；If phase place is all contrary,
Explanation is bus or transformer fault, chopper between first tripping bus and transformator；Again by the positive sequence event of step down side
The positive sequence fault component electric current on barrier current weight and high-voltage side bus institute's line road makees phase bit comparison, it determines whether be that transformator is former
Barrier, if then tripping transformator opposite side chopper；When low-voltage bus bar is near the positive sequence fault component current phase of transformer side
During disappearance, by the positive sequence fault component electric current of the positive sequence fault component electric current of high voltage side of transformer Yu low-pressure side bus institute's line road
Make phase bit comparison；If phase place is all contrary, illustrate it is bus or transformer fault, chopper between first tripping bus and transformator；
Again the positive sequence fault component electric current of the positive sequence fault component electric current of high voltage side of transformer with low-pressure side bus institute's line road is made phase
Bit comparison, it determines whether be transformer fault, if then tripping transformator opposite side chopper；
C) circuit one end positive sequence fault component current phase disappearance
The positive sequence fault component current phase disappearance of circuit local terminal, by this circuit opposite end positive sequence fault component electric current and its institute
Connect the positive sequence fault component electric current of bus and carry out phase bit comparison, if opposite in phase and the circuit of current amplitude maximum, being fault
Circuit；
The positive sequence fault component current phase disappearance of circuit opposite end, by the positive sequence fault component electric current of this circuit local terminal and its
He carries out phase bit comparison by the positive sequence fault component electric current of circuit, if the line that phase place is the most contrary with All other routes and current amplitude is maximum
Lu Zewei faulty line；
(2) phase information mistake
A) during transformer fault
There is mistake in certain one end fault current phase information at transformator two ends, causes being mistaken for bus-bar fault, first tripping
Chopper between fault bus and transformator；If two transformators are to same bussed supply, then compare two transformators with
The amplitude of electric current between fault bus, the chopper between a side bus and transformator that first trip currents amplitude is bigger；Again will
Fault current phase information does not occurs that the side of mistake carries out phase place with the positive sequence fault component electric current on fault bus institute's line road
Relatively, if phase place is almost identical, then explanation is transformer fault, tripping transformator opposite side chopper；
B) during high voltage bus fault
High voltage bus is made mistakes near transformer side fault current phase information, causes being mistaken for transformer fault, compares change
Depressor both sides current amplitude, the high voltage side of transformer chopper that preferential tripping amplitude is bigger, recycling step down side is with high
The fault current phase place on pressure bus institute's line road is made comparisons, if phase is little, explanation is high voltage bus fault, and tripping is with high
All choppers that pressure bus is relevant；
High voltage bus phase entry mistake, is mistaken for inlet wire fault, chopper between first tripping inlet wire and high voltage bus, then
Secondary carry out fault distinguishing, it determines have high voltage bus fault, all choppers that tripping is relevant to high voltage bus；
C) during low-pressure side bus fault
Low-voltage bus bar is made mistakes near transformer side fault current phase information, causes being mistaken for transformer fault, compares stream
Cross the amplitude of transformator both sides electric current, the low-pressure side chopper that first trip currents amplitude is bigger；Recycling high voltage side of transformer with
The fault current component on low-voltage bus bar institute's line road carries out phase bit comparison, can determine low-voltage bus bar fault, tripping and its phase
All choppers even；
During low-pressure side line fault current phase information mistake, it is judged to line fault, the chopper of first tripping faulty line,
Again carry out fault distinguishing, it determines for low-voltage bus bar fault, all choppers that tripping is relevant to low-voltage bus bar；
D) scientific and reasonable during line fault, it determines accurately, the suitability is strong, highly sensitive
During line fault current phase information mistake, the most each bar line current amplitude, the line that first excision amplitude is bigger
Road, then carry out fault distinguishing.
A kind of intelligent substation integration protection method of the present invention, utilizes the positive sequence fault component electric current at fault element two ends
Phase place feature, carries out phase bit comparison and constitutes fault distinguishing principle, and the phase information that combined with intelligent electronic equipment (IED) gathers differentiates
Fault element.When the phase information disappearance that intelligent electronic device (IED) gathers or mistake, expand intelligent electronic device (IED)
The phase information identified in region and current magnitude information, in conjunction with predetermined action decision-making, remain to excise fault unit rapidly
Part.Transformator in intelligent substation, bus, circuit can be made fault element and be differentiated simultaneously, different previous methods are only
Differentiating a kind of fault element, the method is scientific and reasonable, calculates simple, and simple and easy to do, it determines accurately, the suitability is strong, sensitivity
Height, has certain fault-tolerance.
Accompanying drawing explanation
Fig. 1 is the basic flow sheet of a fault distinguishing of a kind of intelligent substation integration protection method；
Fig. 2 is a concrete transformer substation system figure of a kind of intelligent substation integration protection method application；
Fig. 3 is a kind of intelligent substation integration protection method of embodiment 1, break down at substation transformer T1 and
During data transmission normal condition, the transformator T1 two ends positive sequence fault component current phase comparison value analogous diagram of IED output；
Fig. 4 is a kind of intelligent substation integration protection method of embodiment 1, break down at substation transformer T1 and
During data transmission normal condition, the analogous diagram of the transformator T1 two ends chopper output valve of IED output；
Fig. 5 is a kind of intelligent substation integration protection method of embodiment 2, break down at substation transformer T1 and
During the fault current phase information deletion condition that IED30 gathers；The transformator T1 high-pressure side of IED29 output is with low-voltage circuit L9's
Positive sequence fault component current phase comparison value analogous diagram；
Fig. 6 is a kind of intelligent substation integration protection method of embodiment 2, break down at substation transformer T1 and
During the fault current phase information deletion condition that IED30 gathers；The transformator T1 high-pressure side of IED29 output and low-voltage circuit L10
Positive sequence fault component current phase comparison value analogous diagram；
Fig. 7 is a kind of intelligent substation integration protection method of embodiment 2, break down at substation transformer T1 and
During the fault current phase information deletion condition that IED30 gathers；The transformator T1 high-pressure side of IED29 output and low-voltage circuit L11
Positive sequence fault component current phase comparison value analogous diagram；
Fig. 8 is a kind of intelligent substation integration protection method of embodiment 2, break down at substation transformer T1 and
During the fault current phase information deletion condition that IED30 gathers；The transformator T1 high-pressure side of IED29 output and low-voltage circuit L12
Positive sequence fault component current phase comparison value analogous diagram；
Fig. 9 is a kind of intelligent substation integration protection method of embodiment 2, break down at substation transformer T1 and
During the fault current phase information deletion condition that IED30 gathers；The step down side chopper output valve emulation of IED29 output
Figure；
Figure 10 is a kind of intelligent substation integration protection method of embodiment 2, breaks down also at substation transformer T1
And IED30 gather fault current phase information deletion condition time；After tripping transformator T1 low-pressure side chopper, IED29 exports
The positive sequence fault component current phase comparison value analogous diagram of high voltage side of transformer and low-pressure side circuit L9；
Figure 11 is a kind of intelligent substation integration protection method of embodiment 2, breaks down also at substation transformer T1
And IED30 gather fault current phase information deletion condition time；After tripping transformator T1 low-pressure side chopper, IED29 exports
The positive sequence fault component current phase comparison value analogous diagram of high voltage side of transformer and low-pressure side circuit L10；
Figure 12 is a kind of intelligent substation integration protection method of embodiment 2, breaks down also at substation transformer T1
And IED30 gather fault current phase information deletion condition time；After tripping transformator T1 low-pressure side chopper, IED29 exports
The positive sequence fault component current phase comparison value analogous diagram of high voltage side of transformer and low-pressure side circuit L11；
Figure 13 is a kind of intelligent substation integration protection method of embodiment 2, breaks down also at substation transformer T1
And IED30 gather fault current phase information deletion condition time；After tripping transformator T1 low-pressure side chopper, IED29 exports
The positive sequence fault component current phase comparison value analogous diagram of high voltage side of transformer and low-pressure side circuit L12；
Figure 14 is a kind of intelligent substation integration protection method of embodiment 2, breaks down also at substation transformer T1
And IED30 gather fault current phase information deletion condition time；After tripping transformator T1 low-pressure side chopper, IED29 exports
The analogous diagram of high voltage side of transformer chopper output valve；
Figure 15 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；The low-voltage bus bar of IED29 output and the positive sequence fault component of circuit L9
The analogous diagram of current phase comparison value；
Figure 16 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；The low-voltage bus bar of IED29 output divides with the positive sequence fault of circuit L10
The analogous diagram of amount current phase comparison value；
Figure 17 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；The low-voltage bus bar of IED29 output divides with the positive sequence fault of circuit L11
The analogous diagram of amount current phase comparison value；
Figure 18 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；The low-voltage bus bar of IED29 output divides with the positive sequence fault of circuit L12
The analogous diagram of amount current phase comparison value；
Figure 19 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；The analogous diagram of the low-voltage bus bar chopper output valve of IED29 output；
Figure 20 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；After tripping transformator T1 low-pressure side chopper, the change of IED29 output
The analogous diagram of the positive sequence fault component current phase comparison value of depressor high-pressure side and low-pressure side circuit L9；
Figure 21 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；After tripping transformator T1 low-pressure side chopper, the change of IED29 output
The analogous diagram of the positive sequence fault component current phase comparison value of depressor high-pressure side and low-pressure side circuit L10；
Figure 22 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；After tripping transformator T1 low-pressure side chopper, the change of IED29 output
The analogous diagram of the positive sequence fault component current phase comparison value of depressor high-pressure side and low-pressure side circuit L11；
Figure 23 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；After tripping transformator T1 low-pressure side chopper, the change of IED29 output
The analogous diagram of the positive sequence fault component current phase comparison value of depressor high-pressure side and low-pressure side circuit L12；
Figure 24 is a kind of intelligent substation integration protection method of embodiment 3, breaks down also at substation transformer T1
And IED30 gather fault current phase information mistake time；After tripping transformator T1 low-pressure side chopper, the change of IED29 output
The analogous diagram of depressor T1 high-pressure side chopper output valve；
Figure 25 is a kind of intelligent substation integration protection method of embodiment 4, and in transformer station, high voltage bus breaks down also
And IED1 gather fault current phase information mistake time；The positive sequence fault component current phase at the transformator two ends of IED2 output
The analogous diagram of fiducial value
Figure 26 is a kind of intelligent substation integration protection method of embodiment 4, and in transformer station, high voltage bus breaks down also
And IED1 gather fault current phase information mistake time；The analogous diagram of the transformer breaker output valve of IED2 output；
Figure 27 is a kind of intelligent substation integration protection method of embodiment 4, and in transformer station, high voltage bus breaks down also
And IED1 gather fault current phase information mistake time；After the chopper of tripping transformator T2 high-pressure side, the transformation of IED2 output
The analogous diagram of the positive sequence fault component current phase comparison value of device low-pressure side and high-pressure side circuit L1；
Figure 28 is a kind of intelligent substation integration protection method of embodiment 4, and in transformer station, high voltage bus breaks down also
And IE1 gather fault current phase information mistake time；After the chopper of tripping transformator T2 high-pressure side, the transformator of IED2 output
The analogous diagram of the positive sequence fault component current phase comparison value of low-pressure side and high-pressure side circuit L2；
Figure 29 is a kind of intelligent substation integration protection method of embodiment 4, and in transformer station, high voltage bus breaks down also
And IED1 gather fault current phase information mistake time；After the chopper of tripping transformator T2 high-pressure side, the transformation of IED2 output
The analogous diagram of device T2 low-pressure side chopper output valve.
Detailed description of the invention
Below in conjunction with drawings and Examples, the intelligent substation integration protection method of the present invention is carried out clearly and completely
Describe.
Embodiment 1:
Embodiment 1 provides a kind of intelligent substation integration protection method, breaks down and number at substation transformer T1
According to transmission normal condition, comprise the steps:
S1: utilize the positive sequence fault component current phase feature at fault element two ends, carries out phase bit comparison composition fault and sentences
Other principle, the phase information Judging fault element that combined with intelligent electronic equipment (IED) gathers；
Step S1 includes that utilizing positive sequence fault component current phase feature to constitute fault distinguishing principle combined with intelligent electronics sets
The phase information Judging fault element that standby (IED) gathers, specifically includes:
It is to point to circuit from bus that S11: regulation flows through the positive sequence fault component electric current positive direction of protection；When circuit, bus,
During the internal fault of transformator generating region, the positive sequence fault current phase at its two ends is little；When there is external area error, its two ends
Positive sequence fault current phase close to 180 °；The phase place feature that therefore, it can utilize positive sequence fault component electric current is distinguished
Fault and non-faulting element；The current amplitude of simultaneous faults point is also maximum, and amplitude information can be used to strengthen phase criterion
Reliability；
S12: access line two ends, transformator two ends, bus are near the coupled feeder line in transformator side and mother respectively
On positive sequence fault component electric current carry out phase bit comparison, if current phase is more or less the same, then illustrate to break down in this element road；If
Current phase differs close to 180 °, then explanation occurs external area error, shown in criterion such as formula (1), (2)；
In formula:It is respectively the positive sequence fault component electric current at element two ends；
S2: when the phase information disappearance that intelligent electronic device (IED) gathers or mistake, expand intelligent electronic device
(IED) the phase information in identification region and current magnitude information, in conjunction with predetermined action decision-making, remain to excise rapidly event
Barrier element；
Step S2 includes, when the phase information disappearance that IED gathers or mistake, expanding the identification of intelligent electronic device (IED)
Phase information in region and current magnitude information, in conjunction with predetermined action decision-making, remain to excise rapidly fault element, specifically
Including:
(1) phase information disappearance
A) transformator side positive sequence fault component current phase disappearance
When the positive sequence fault component current phase of transformator side lacks, by the circuit positive sequence fault of connected for this side bus
Current weight and transformator do not lack the positive sequence fault component electric current of phase place side and make phase bit comparison；That is: high voltage side of transformer is worked as
Positive sequence fault component electric current disappearance time, by the positive sequence fault component electric current of step down side and high-voltage side bus institute's line road
Positive sequence fault component electric current make phase bit comparison；If phase place is all contrary, illustrate it is bus or transformer fault, first tripping high pressure
Chopper between bus and transformator；Positive sequence fault component electric current and high voltage bus institute line again with step down side
The positive sequence fault component electric current on road carries out phase bit comparison, it determines whether be transformer fault, if side tripping transformator opposite side
Chopper；When the positive sequence fault component current phase of transformator side lacks, by the circuit positive sequence fault of connected for this side bus
Current weight and transformator do not lack the positive sequence fault component electric current of phase place side and make phase bit comparison；When step down side just
During sequence fault component electric current disappearance, by the positive sequence fault component electric current of high voltage side of transformer with low-pressure side bus institute's line road just
Sequence fault component electric current makees phase bit comparison；If phase place is all contrary, illustrate it is bus or transformer fault, first tripping low-voltage bus bar
And chopper between transformator；Positive sequence fault component electric current and low-voltage bus bar institute's line road again with high voltage side of transformer
Positive sequence fault component electric current carries out phase bit comparison, it determines whether be transformer fault, if side tripping transformator opposite side open circuit
Device；
B) bus one end positive sequence fault component current phase disappearance
When high voltage bus lacks near the positive sequence fault component current phase of transformer side, by step down side just
The positive sequence fault component electric current on sequence fault component electric current and high-voltage side bus institute's line road makees phase bit comparison；If phase directional all phases
Anti-then explanation is bus or transformer fault, chopper between first tripping bus and transformator；Again by step down side just
The positive sequence fault component electric current on sequence fault component electric current and high-voltage side bus institute's line road makees phase bit comparison, it determines whether be transformation
Device fault, if then tripping transformator opposite side chopper；When low-voltage bus bar is near the positive sequence fault component electric current of transformer side
During phase place disappearance, by the positive sequence fault component of the positive sequence fault component electric current of high voltage side of transformer Yu low-pressure side bus institute's line road
Electric current makees phase bit comparison；If phase directional is all contrary, illustrate it is bus or transformer fault, elder generation's tripping bus and transformator it
Between chopper；Again by the positive sequence fault component of the positive sequence fault component electric current of high voltage side of transformer Yu low-pressure side bus institute's line road
Electric current makees phase bit comparison, it determines whether be transformer fault, if then tripping transformator opposite side chopper；
C) circuit one end positive sequence fault component current phase disappearance
The positive sequence fault component current phase disappearance of circuit local terminal, by this circuit opposite end positive sequence fault component electric current and its institute
Connect the positive sequence fault component electric current of bus and carry out phase bit comparison, if opposite in phase and the circuit of current amplitude maximum, being fault
Circuit；
The positive sequence fault component current phase disappearance of circuit opposite end, by the positive sequence fault component electric current of this circuit local terminal and its
He carries out phase bit comparison by the positive sequence fault component electric current of circuit, if the line that phase place is the most contrary with All other routes and current amplitude is maximum
Lu Zewei faulty line；
(2) phase information mistake
A) during transformer fault
There is mistake in certain one end fault current phase information at transformator two ends, causes being mistaken for bus-bar fault, first tripping
Chopper between fault bus and transformator；If two transformators are to same bussed supply, then compare two transformators with
The amplitude of electric current between fault bus, the chopper between a side bus and transformator that first trip currents amplitude is bigger；Again will
Fault current phase information does not occurs that the side of mistake carries out phase place with the positive sequence fault component electric current on fault bus institute's line road
Relatively, if phase place is almost identical, then explanation is transformer fault, tripping transformator opposite side chopper；
B) during high voltage bus fault
High voltage bus is made mistakes near transformer side fault current phase information, causes being mistaken for transformer fault, compares change
Depressor both sides current amplitude, the high voltage side of transformer chopper that preferential tripping amplitude is bigger, recycling step down side is with high
The fault current phase place on pressure bus institute's line road is made comparisons, if direction is more or less the same, explanation is high voltage bus fault, and tripping is with high
All choppers that pressure bus is relevant；
High voltage bus inlet wire anisotropy, is mistaken for inlet wire fault, chopper between first tripping inlet wire and high voltage bus, then
Secondary carry out fault distinguishing, it determines have high voltage bus fault, all choppers that tripping is relevant to high voltage bus；
C) during low-pressure side bus fault
Low-voltage bus bar is made mistakes near transformer side fault current phase information, causes being mistaken for transformer fault, compares stream
Cross the amplitude of transformator both sides electric current, the low-pressure side chopper that first trip currents amplitude is bigger；Recycling high voltage side of transformer with
The fault current component on low-voltage bus bar institute's line road carries out phase bit comparison, can determine low-voltage bus bar fault, tripping and its phase
All choppers even；
During low-pressure side line fault current phase information mistake, it is judged to line fault, the chopper of first tripping faulty line,
Again carry out fault distinguishing, it determines for low-voltage bus bar fault, all choppers that tripping is relevant to low-voltage bus bar；
D) during line fault
During line fault current phase information mistake, the most each bar line current amplitude, the line that first excision amplitude is bigger
Road, then carry out fault distinguishing；
According to above-mentioned steps, it determines go out transformer fault, tripping transformator two ends chopper.It is defeated that Fig. 3, Fig. 4 are respectively IED
The transformator two ends positive sequence fault component current phase comparison value that goes out, the analogous diagram of chopper output valve.
Embodiment 2:
Embodiment 2 provides a kind of intelligent substation integration protection method, break down at substation transformer T1 and
During the fault phase information dropout that IED30 gathers, the differentiation of fault element, comprises the steps:
Gather positive sequence fault component current information, relatively the positive sequence fault component current phase at each element two ends, according to event
Barrier element discrimination principle is determined as low-voltage bus bar or transformator T1 fault, the open circuit between first tripping transformator and low-voltage bus bar
Device.Fig. 5, Fig. 6, Fig. 7, Fig. 8 are the high voltage side of transformer positive sequence fault component current phase with low-pressure side circuit of IED29 output
Fiducial value analogous diagram；Fig. 9 is the analogous diagram of the step down side chopper output valve of IED29 output；
Again gather positive sequence fault component current information, utilize positive sequence fault component electric current and the low pressure of high voltage side of transformer
The positive sequence fault component electric current on bus institute's line road carries out phase bit comparison, is determined as transformator T1 according to fault element discrimination principle
Fault, tripping transformator T1 high-pressure side chopper；Figure 10, Figure 11, Figure 12, Figure 13 are tripping transformator T1 low-pressure side chopper
After, the high voltage side of transformer of IED29 output and the positive sequence fault component current phase comparison value analogous diagram of low-pressure side circuit；Figure 14
After tripping transformator T1 low-pressure side chopper, the analogous diagram of the high voltage side of transformer chopper output valve of IED29 output.
Embodiment 3:
Embodiment 3 provides a kind of intelligent substation integration protection method, break down at substation transformer T1 and
During the Low-side faults phase information mistake that IED30 gathers, the differentiation of fault element, comprises the steps:
Gather positive sequence fault component current information, relatively the positive sequence fault component current phase at each element two ends, according to event
Barrier element discrimination principle is determined as low-voltage bus bar fault, and according to phase information and fault current amplitudes information, first tripping low pressure is female
Chopper between line and transformator T1.Figure 15, Figure 16, Figure 17, Figure 18 be IED29 output low-voltage bus bar and circuit just
The analogous diagram of sequence fault component current phase comparison value；Figure 19 is the emulation of the low-voltage bus bar chopper output valve of IED29 output
Figure；
Again gather positive sequence fault component current information, utilize positive sequence fault component electric current and the low pressure of high voltage side of transformer
The positive sequence fault component electric current on bus institute's line road carries out phase bit comparison, is determined as transformator T1 according to fault element discrimination principle
Fault, tripping transformator T1 high-pressure side chopper；Figure 20, Figure 21, Figure 22, Figure 23 are tripping transformator T1 low-pressure side chopper
After, the high voltage side of transformer of IED29 output and the analogous diagram of the positive sequence fault component current phase comparison value of low-pressure side circuit；Figure
The analogous diagram that 24 is the transformator T1 high-pressure side chopper output valve of IED29 output.
Embodiment 4:
Embodiment 4 provides a kind of intelligent substation integration protection method, break down at transformer station's high voltage bus and
There is the differentiation of fault element during mistake in the phase information that IED1 gathers, comprises the steps:
Gather positive sequence fault component current information, relatively the positive sequence fault component current phase at each element two ends, according to event
Barrier element discrimination principle is determined as transformator T2 fault, and according to phase information and fault current amplitudes information, first tripping high pressure is female
Chopper between line and transformator T2.Figure 25, Figure 26 are respectively the positive sequence fault component electric current at the transformator two ends of IED output
The analogous diagram of phase place fiducial value and the analogous diagram of chopper output valve；
Again gather positive sequence fault component current information, utilize positive sequence fault component electric current and the high pressure of step down side
The positive sequence fault component electric current on bus institute's line road carries out phase bit comparison, is determined as high voltage bus according to fault element discrimination principle
Fault, the chopper that tripping is associated with high voltage bus；After Figure 27, Figure 28 are tripping transformator T2 high-pressure side chopper, IED2
The step down side of output and the analogous diagram of the positive sequence fault component current phase comparison value of high-pressure side circuit；Figure 29 is IED2
The analogous diagram of the transformator T2 low-pressure side chopper output valve of output.
A kind of intelligent substation integration protection method of the present invention, utilizes the positive sequence fault component electric current at fault element two ends
Phase place feature, carries out phase bit comparison and constitutes fault distinguishing principle, and the phase information that combined with intelligent electronic equipment (IED) gathers differentiates
Fault element.When the phase information disappearance that intelligent electronic device (IED) gathers or mistake, expand intelligent electronic device (IED)
The phase information identified in region and current magnitude information, in conjunction with predetermined action decision-making, remain to excise fault unit rapidly
Part.Transformator in intelligent substation, bus, circuit can be made fault element and be differentiated simultaneously, different previous methods are only
Differentiating a kind of fault element, the method is scientific and reasonable, calculates simple, and simple and easy to do, it determines accurately, the suitability is strong, sensitivity
Height, has certain fault-tolerance.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right
For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or
Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or
Change among still in the protection domain of the invention.
Claims (1)
1. an intelligent substation integration protection method, is characterized in that, it comprises the steps:
1) utilize the positive sequence fault component current phase feature at fault element two ends, carry out phase bit comparison composition fault distinguishing former
Then, the phase information Judging fault element that combined with intelligent electronic equipment (IED) gathers
It is to point to circuit from bus that regulation flows through the positive sequence fault component electric current positive direction of protection；When circuit, bus, transformator are sent out
During raw troubles inside the sample space, the positive sequence fault current phase at its two ends is little；When there is external area error, the positive sequence event at its two ends
Barrier current phase differs close to 180 °；Therefore, utilize the phase place feature of positive sequence fault component electric current to distinguish fault and non-faulting
Element；The current amplitude of simultaneous faults point is also maximum, and amplitude information is used for strengthening the reliability of phase criterion；
Access line two ends, transformator two ends, bus positive sequence on the coupled feeder line in transformator side and mother respectively
Fault component electric current carries out phase bit comparison, if current phase is more or less the same, then illustrates to break down in this element road；If current phase
Difference is close to 180 °, then explanation occurs external area error, and criterion is formula (1), formula (2)；
In formula:It is respectively the positive sequence fault component electric current at element two ends；
2) when the phase information disappearance that intelligent electronic device (IED) gathers or mistake, the knowledge of intelligent electronic device (IED) is expanded
Phase information in other region and current magnitude information, in conjunction with predetermined action decision-making, remain to excise rapidly fault element；
(1) phase information disappearance
A) transformator side positive sequence fault component current phase disappearance
When the positive sequence fault component current phase of transformator side lacks, by the circuit positive sequence fault component of connected for this side bus
Electric current and transformator do not lack the positive sequence fault component electric current of phase place side and make phase bit comparison, it determines whether be transformer fault,
If side tripping transformator opposite side chopper；
B) bus one end positive sequence fault component current phase disappearance
When high voltage bus lacks near the positive sequence fault component current phase of transformer side, by the positive sequence event of step down side
The positive sequence fault component electric current on barrier current weight and high-voltage side bus institute's line road makees phase bit comparison；If phase place is all contrary, illustrate
It is bus or transformer fault, chopper between first tripping bus and transformator；Again the positive sequence fault of step down side is divided
The positive sequence fault component electric current on amount electric current and high-voltage side bus institute's line road makees phase bit comparison, it determines whether be transformer fault,
If then tripping transformator opposite side chopper；When low-voltage bus bar lacks near the positive sequence fault component current phase of transformer side
Time, the positive sequence fault component electric current of the positive sequence fault component electric current of high voltage side of transformer with low-pressure side bus institute's line road is made phase
Bit comparison；If phase place is all contrary, illustrate it is bus or transformer fault, chopper between first tripping bus and transformator；Again will
The positive sequence fault component electric current on the positive sequence fault component electric current of high voltage side of transformer and low-pressure side bus institute's line road makees phase place ratio
Relatively, it determines whether be transformer fault, if then tripping transformator opposite side chopper；
C) circuit one end positive sequence fault component current phase disappearance
The positive sequence fault component current phase disappearance of circuit local terminal, is connected mother by this circuit opposite end positive sequence fault component electric current with it
The positive sequence fault component electric current of line and carry out phase bit comparison, if opposite in phase and the maximum circuit of current amplitude, is fault wire
Road；
The positive sequence fault component current phase disappearance of circuit opposite end, by the positive sequence fault component electric current of this circuit local terminal and other lines
The positive sequence fault component electric current on road carries out phase bit comparison, if the circuit that phase place is the most contrary with All other routes and current amplitude is maximum,
For faulty line；
(2) phase information mistake
A) during transformer fault
There is mistake in certain one end fault current phase information at transformator two ends, causes being mistaken for bus-bar fault, first tripping fault
Chopper between bus and transformator；If two transformators are to same bussed supply, then compare two transformators and fault
The amplitude of electric current between bus, the chopper between a side bus and transformator that first trip currents amplitude is bigger；Again by fault
Current phase information does not occurs that the side of mistake carries out phase bit comparison with the positive sequence fault component electric current on fault bus institute's line road,
If phase place is almost identical, then explanation is transformer fault, tripping transformator opposite side chopper；
B) during high voltage bus fault
High voltage bus is made mistakes near transformer side fault current phase information, causes being mistaken for transformer fault, compares transformator
Both sides current amplitude, the high voltage side of transformer chopper that preferential tripping amplitude is bigger, recycling step down side is female with high pressure
The fault current phase place on line institute's line road is made comparisons, if phase is little, explanation is high voltage bus fault, and tripping is female with high pressure
All choppers that line is relevant；
High voltage bus phase entry mistake, is mistaken for inlet wire fault, chopper between first tripping inlet wire and high voltage bus, again enters
Row fault distinguishing, it determines have high voltage bus fault, all choppers that tripping is relevant to high voltage bus；
C) during low-pressure side bus fault
Low-voltage bus bar is made mistakes near transformer side fault current phase information, causes being mistaken for transformer fault, compares and flow through change
The amplitude of depressor both sides electric current, the low-pressure side chopper that first trip currents amplitude is bigger；Recycling high voltage side of transformer and low pressure
The fault current component on bus institute's line road carries out phase bit comparison, can determine low-voltage bus bar fault, and tripping is coupled
All choppers；
During low-pressure side line fault current phase information mistake, it is judged to line fault, the chopper of first tripping faulty line, again
Carry out fault distinguishing, it determines for low-voltage bus bar fault, all choppers that tripping is relevant to low-voltage bus bar；
D) scientific and reasonable during line fault, it determines accurately, the suitability is strong, highly sensitive
During line fault current phase information mistake, the most each bar line current amplitude, the circuit that first excision amplitude is bigger, then
Carry out fault distinguishing.
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