CN106229950B - A kind of intelligent substation integration protection method - Google Patents
A kind of intelligent substation integration protection method Download PDFInfo
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- CN106229950B CN106229950B CN201610830194.7A CN201610830194A CN106229950B CN 106229950 B CN106229950 B CN 106229950B CN 201610830194 A CN201610830194 A CN 201610830194A CN 106229950 B CN106229950 B CN 106229950B
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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
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Abstract
A kind of intelligent substation integration protection method of the present invention; its main feature is that; using the positive sequence fault component current phase feature at fault element both ends, carry out phase bit comparison and form fault distinguishing principle, the phase information Judging fault element gathered with reference to intelligent electronic device (IED).When the phase information missing or mistake of intelligent electronic device (IED) collection, expand the phase information and current magnitude information in the identification region of intelligent electronic device (IED), with reference to predetermined action decision-making, remain to rapidly cut off fault element.Fault element differentiation can be made to the transformer in intelligent substation, busbar, circuit at the same time, different previous methods only differentiate a kind of fault element this method is scientific and reasonable, calculate simply, simple and easy to do, it is accurate to differentiate, strong applicability, high sensitivity, has certain fault-tolerance.
Description
Technical field
The present invention relates to technical field of relay protection, is a kind of intelligent substation integration protection method.
Background technology
With rapid economic development, the scale and complexity of China's power grid all expand and are lifted, the method for operation accordingly
Become more flexibly, the requirement to intelligent substation relay protection is higher and higher, and compared with traditional substation, intelligent substation is real
Whole station information digitalization, communications platform networking, information sharing standardization are showed, interoperability can be conveniently realized.But intelligence
Easily there is the situation of loss of data or error in data in the characteristics of energy substation information is shared.
Traditional relaying configuration has no longer adapted to the requirement of power network development, and fault message is shared, and is had between each protection
These problems for just there may be of effect cooperation, using the multiple spot information of substation it is fast and reliable to failure progress cut off.
It may also take into the influence after failure removal to system at the same time, and will influence to be preferably minimized using corresponding control measure.Cause
This, proposes that there are imperative to solve the problems, such as intelligent substation for a kind of scientific and reasonable technical method.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies of the prior art and provide a kind of scientific and reasonable, differentiation standard
Really, strong applicability, the intelligent substation integration protection method of high sensitivity.
The technical method for solving the use of its technical problem is a kind of intelligent substation integration protection method, it is characterized in that, it
Include the following steps：
1) the positive sequence fault component current phase feature at fault element both ends is utilized, phase bit comparison is carried out and forms fault distinguishing
Principle, the phase information Judging fault element gathered with reference to intelligent electronic device (IED)
The positive sequence fault component electric current positive direction that regulation flows through protection is to be directed toward circuit from busbar；When circuit, busbar, transformation
When troubles inside the sample space occurs for device, the positive sequence fault current phase at its both ends is not much different；When external area error occurs, its both ends is just
Sequence fault current phase is differed close to 180 °；Therefore, failure and non-is distinguished using the phase feature of positive sequence fault component electric current
Fault element；The current amplitude of simultaneous faults point is also the largest, and amplitude information is used for strengthening to the reliability of phase criterion；
Access line both ends, transformer both ends, busbar are on the coupled feeder line in transformer side and mother respectively
Positive sequence fault component electric current carries out phase bit comparison, if current phase is not much different, illustrates that the element road is broken down；If electric current
Phase is differed close to 180 °, then external area error occurs for explanation, and criterion is formula (1), formula (2)；
In formula：The respectively positive sequence fault component electric current at element both ends；
2) when the phase information missing or mistake of intelligent electronic device (IED) collection, intelligent electronic device (IED) is expanded
Identification region in phase information and current magnitude information, with reference to predetermined action decision-making, remain to rapidly cut off failure member
Part；
(1) phase information lacks
A) positive sequence fault component current phase in transformer side lacks
When the positive sequence fault component current phase missing of transformer side, which is connected to the circuit positive sequence failure of busbar
The positive sequence fault component electric current that current weight does not lack phase side with transformer makees phase bit comparison, discriminates whether it is transformer event
Barrier, if side tripping transformer opposite side breaker；
B) positive sequence fault component current phase in busbar one end lacks
When positive sequence fault component current phase missing of the high voltage bus close to transformer side, by step down side just
Sequence fault component electric current and the positive sequence fault component electric current of high-voltage side bus institute connecting lines make phase bit comparison；If phase is all opposite
Explanation is busbar or transformer fault, breaker between first tripping busbar and transformer；Again by the positive sequence event of step down side
Barrier current weight and the positive sequence fault component electric current of high-voltage side bus institute connecting lines make phase bit comparison, discriminate whether it is transformer event
Barrier, if then tripping transformer opposite side breaker；When low-voltage bus bar is close to the positive sequence fault component current phase of transformer side
During missing, by the positive sequence fault component electric current of high voltage side of transformer and the positive sequence fault component electric current of low-pressure side bus institute connecting lines
Make phase bit comparison；Explanation is busbar or transformer fault if phase is all opposite, breaker between first tripping busbar and transformer；
The positive sequence fault component electric current of high voltage side of transformer and the positive sequence fault component electric current of low-pressure side bus institute connecting lines are made into phase again
Bit comparison, discriminates whether it is transformer fault, if then tripping transformer opposite side breaker；
C) positive sequence fault component current phase in circuit one end lacks
The positive sequence fault component current phase missing of circuit local terminal, by the circuit opposite end positive sequence fault component electric current and its institute
Even the positive sequence fault component electric current of busbar and progress phase bit comparison, are failure if opposite in phase and the circuit of current amplitude maximum
Circuit；
The positive sequence fault component current phase missing of circuit opposite end, by the positive sequence fault component electric current of the circuit local terminal and its
The positive sequence fault component electric current of his circuit carries out phase bit comparison, if phase is all opposite with All other routes and the line of current amplitude maximum
Lu Zewei faulty lines；
(2) phase information mistake
A) during transformer fault
There is mistake in certain one end fault current phase information at transformer both ends, causes to be mistaken for bus-bar fault, first tripping
Breaker between fault bus and transformer；If two transformers to same bussed supply, compare two transformers with
The amplitude of electric current between fault bus, the breaker between first trip currents amplitude larger a side bus and transformer；Again will
Fault current phase information does not occur the side of mistake and carries out phase with the positive sequence fault component electric current of fault bus institute connecting lines
Compare, if phase is almost identical, illustrate it is transformer fault, tripping transformer opposite side breaker；
B) during high voltage bus failure
High voltage bus malfunctions close to transformer side fault current phase information, causes to be mistaken for transformer fault, compares change
Depressor both sides current amplitude, the larger high voltage side of transformer breaker of preferential tripping amplitude, recycles step down side and height
The fault current phase of pressure busbar institute connecting lines is made comparisons, if phase is not much different, explanation is high voltage bus failure, tripping and height
Press the relevant all breakers of busbar；
High voltage bus phase entry mistake, is mistaken for inlet wire failure, breaker between first tripping inlet wire and high voltage bus, then
Secondary carry out fault distinguishing, determines high voltage bus failure, tripping and the relevant all breakers of high voltage bus；
C) during low-pressure side bus failure
Low-voltage bus bar malfunctions close to transformer side fault current phase information, causes to be mistaken for transformer fault, compares stream
Cross the amplitude of transformer both sides electric current, the larger low-pressure side breaker of first trip currents amplitude；Recycle high voltage side of transformer with
The fault current component of low-voltage bus bar institute connecting lines carries out phase bit comparison, can determine low-voltage bus bar failure, tripping and its phase
All breakers even；
During low-pressure side line fault current phase information mistake, line fault is judged to, the breaker of first tripping faulty line,
Fault distinguishing is carried out again, is determined as low-voltage bus bar failure, tripping and the relevant all breakers of low-voltage bus bar；
D) scientific and reasonable during line fault, it is accurate to differentiate, strong applicability, high sensitivity
During line fault current phase information mistake, first more each bar line current amplitude, first cuts off the larger line of amplitude
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 both ends
Phase feature, carries out phase bit comparison and forms fault distinguishing principle, and the phase information gathered with reference to intelligent electronic device (IED) differentiates
Fault element.When the phase information missing or mistake of intelligent electronic device (IED) collection, expand intelligent electronic device (IED)
Identification region in phase information and current magnitude information, with reference to predetermined action decision-making, remain to rapidly cut off failure member
Part.Fault element differentiation can be made to the transformer in intelligent substation, busbar, circuit at the same time, different previous methods are only
This method is scientific and reasonable to be differentiated to a kind of fault element, is calculated simply, simple and easy to do, it is accurate to differentiate, strong applicability, sensitivity
Height, has certain fault-tolerance.
Brief description of the drawings
Fig. 1 is a kind of basic flow chart of a fault distinguishing of intelligent substation integration protection method；
Fig. 2 is an a kind of specific transformer substation system figure of intelligent substation integration protection method application；
Fig. 3 is a kind of intelligent substation integration protection method of embodiment 1, break down in substation transformer T1 and
During data transfer normal condition, the transformer T1 both ends positive sequence fault component current phase comparison value analogous diagram of IED outputs；
Fig. 4 is a kind of intelligent substation integration protection method of embodiment 1, break down in substation transformer T1 and
During data transfer normal condition, the analogous diagram of the transformer T1 both ends breaker output valve of IED outputs；
Fig. 5 is a kind of intelligent substation integration protection method of embodiment 2, break down in substation transformer T1 and
During the fault current phase information deletion condition of IED30 collections；The transformer T1 high-pressure sides of IED29 outputs are 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 in substation transformer T1 and
During the fault current phase information deletion condition of IED30 collections；The transformer T1 high-pressure sides of IED29 outputs 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 in substation transformer T1 and
During the fault current phase information deletion condition of IED30 collections；The transformer T1 high-pressure sides of IED29 outputs 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 in substation transformer T1 and
During the fault current phase information deletion condition of IED30 collections；The transformer T1 high-pressure sides of IED29 outputs 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 in substation transformer T1 and
During the fault current phase information deletion condition of IED30 collections；The step down side breaker output valve emulation of IED29 outputs
Figure；
Figure 10 is a kind of intelligent substation integration protection method of embodiment 2, is broken down simultaneously in substation transformer T1
And during the fault current phase information deletion condition of IED30 collections；After tripping transformer T1 low-pressure side breakers, IED29 outputs
High voltage side of transformer and low-pressure side circuit L9 positive sequence fault component current phase comparison value analogous diagram；
Figure 11 is a kind of intelligent substation integration protection method of embodiment 2, is broken down simultaneously in substation transformer T1
And during the fault current phase information deletion condition of IED30 collections；After tripping transformer T1 low-pressure side breakers, IED29 outputs
High voltage side of transformer and low-pressure side circuit L10 positive sequence fault component current phase comparison value analogous diagram；
Figure 12 is a kind of intelligent substation integration protection method of embodiment 2, is broken down simultaneously in substation transformer T1
And during the fault current phase information deletion condition of IED30 collections；After tripping transformer T1 low-pressure side breakers, IED29 outputs
High voltage side of transformer and low-pressure side circuit L11 positive sequence fault component current phase comparison value analogous diagram；
Figure 13 is a kind of intelligent substation integration protection method of embodiment 2, is broken down simultaneously in substation transformer T1
And during the fault current phase information deletion condition of IED30 collections；After tripping transformer T1 low-pressure side breakers, IED29 outputs
High voltage side of transformer and low-pressure side circuit L12 positive sequence fault component current phase comparison value analogous diagram；
Figure 14 is a kind of intelligent substation integration protection method of embodiment 2, is broken down simultaneously in substation transformer T1
And during the fault current phase information deletion condition of IED30 collections；After tripping transformer T1 low-pressure side breakers, IED29 outputs
High voltage side of transformer breaker output valve analogous diagram；
Figure 15 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；The positive sequence fault component of the low-voltage bus bar and circuit L9 of IED29 outputs
The analogous diagram of current phase comparison value；
Figure 16 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；The positive sequence failure point of the low-voltage bus bar of IED29 outputs and circuit L10
Measure the analogous diagram of current phase comparison value；
Figure 17 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；The positive sequence failure point of the low-voltage bus bar of IED29 outputs and circuit L11
Measure the analogous diagram of current phase comparison value；
Figure 18 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；The positive sequence failure point of the low-voltage bus bar of IED29 outputs and circuit L12
Measure the analogous diagram of current phase comparison value；
Figure 19 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；The analogous diagram of the low-voltage bus bar breaker output valve of IED29 outputs；
Figure 20 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；After tripping transformer T1 low-pressure side breakers, the change of IED29 outputs
Depressor high-pressure side and the analogous diagram of the positive sequence fault component current phase comparison value of low-pressure side circuit L9；
Figure 21 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；After tripping transformer T1 low-pressure side breakers, the change of IED29 outputs
Depressor high-pressure side and the analogous diagram of the positive sequence fault component current phase comparison value of low-pressure side circuit L10；
Figure 22 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；After tripping transformer T1 low-pressure side breakers, the change of IED29 outputs
Depressor high-pressure side and the analogous diagram of the positive sequence fault component current phase comparison value of low-pressure side circuit L11；
Figure 23 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；After tripping transformer T1 low-pressure side breakers, the change of IED29 outputs
Depressor high-pressure side and the analogous diagram of the positive sequence fault component current phase comparison value of low-pressure side circuit L12；
Figure 24 is a kind of intelligent substation integration protection method of embodiment 3, is broken down simultaneously in substation transformer T1
And during the fault current phase information mistake of IED30 collections；After tripping transformer T1 low-pressure side breakers, the change of IED29 outputs
The analogous diagram of depressor T1 high-pressure sides breaker output valve；
Figure 25 is a kind of intelligent substation integration protection method of embodiment 4, is broken down simultaneously in substation's high voltage bus
And during the fault current phase information mistake of IED1 collections；The positive sequence fault component current phase at the transformer both ends of IED2 outputs
The analogous diagram of fiducial value
Figure 26 is a kind of intelligent substation integration protection method of embodiment 4, is broken down simultaneously in substation's high voltage bus
And during the fault current phase information mistake of IED1 collections；The analogous diagram of the transformer breaker output valve of IED2 outputs；
Figure 27 is a kind of intelligent substation integration protection method of embodiment 4, is broken down simultaneously in substation's high voltage bus
And during the fault current phase information mistake of IED1 collections；After the breaker of tripping transformer T2 high-pressure sides, the transformation of IED2 outputs
The analogous diagram of device low-pressure side and the positive sequence fault component current phase comparison value of high-pressure side circuit L1；
Figure 28 is a kind of intelligent substation integration protection method of embodiment 4, is broken down simultaneously in substation's high voltage bus
And during the fault current phase information mistake of IE1 collections；After the breaker of tripping transformer T2 high-pressure sides, the transformer of IED2 outputs
The analogous diagram of low-pressure side and the positive sequence fault component current phase comparison value of high-pressure side circuit L2；
Figure 29 is a kind of intelligent substation integration protection method of embodiment 4, is broken down simultaneously in substation's high voltage bus
And during the fault current phase information mistake of IED1 collections；After the breaker of tripping transformer T2 high-pressure sides, the transformation of IED2 outputs
The analogous diagram of device T2 low-pressure side breaker output valves.
Embodiment
The intelligent substation integration protection method of the present invention is carried out clearly and completely below in conjunction with drawings and examples
Description.
Embodiment 1：
Embodiment 1 provides a kind of intelligent substation integration protection method, breaks down and counts in substation transformer T1
According to transmission normal condition, include the following steps：
S1：Using the positive sequence fault component current phase feature at fault element both ends, carry out phase bit comparison composition failure and sentence
Other principle, the phase information Judging fault element gathered with reference to intelligent electronic device (IED)；
Step S1 forms fault distinguishing principle combination smart electronics using positive sequence fault component current phase feature and sets
The phase information Judging fault element of standby (IED) collection, specifically includes：
S11：The positive sequence fault component electric current positive direction that regulation flows through protection is to be directed toward circuit from busbar；When circuit, busbar,
When troubles inside the sample space occurs for transformer, the positive sequence fault current phase at its both ends is not much different；When external area error occurs, its both ends
Positive sequence fault current phase differ close to 180 °；Therefore, can be distinguished using the phase feature of positive sequence fault component electric current
Failure and non-faulting element；The current amplitude of simultaneous faults point is also the largest, and amplitude information can be used for strengthening phase criterion
Reliability；
S12：Access line both ends, transformer both ends, busbar are close to the coupled feeder line in transformer side and mother respectively
On positive sequence fault component electric current carry out phase bit comparison, if current phase is not much different, illustrate that the element road is broken down；If
Current phase is differed close to 180 °, then external area error occurs for explanation, shown in criterion such as formula (1), (2)；
In formula：The respectively positive sequence fault component electric current at element both ends；
S2：When the phase information missing or mistake of intelligent electronic device (IED) collection, expand intelligent electronic device
(IED) the phase information and current magnitude information in identification region, with reference to predetermined action decision-making, remains to rapidly cut off event
Hinder element；
Step S2 includes, when the phase information missing or mistake of IED collections, expanding the identification of intelligent electronic device (IED)
Phase information and current magnitude information in region, with reference to predetermined action decision-making, remain to rapidly cut off fault element, specifically
Including：
(1) phase information lacks
A) positive sequence fault component current phase in transformer side lacks
When the positive sequence fault component current phase missing of transformer side, which is connected to the circuit positive sequence failure of busbar
The positive sequence fault component electric current that current weight does not lack phase side with transformer makees phase bit comparison；I.e.：Work as high voltage side of transformer
Positive sequence fault component electric current missing when, by the positive sequence fault component electric current of step down side and high-voltage side bus institute connecting lines
Positive sequence fault component electric current make phase bit comparison；Explanation is busbar or transformer fault if phase is all opposite, first tripping high pressure
Breaker between busbar and transformer；Reuse the positive sequence fault component electric current and high voltage bus institute line of step down side
The positive sequence fault component electric current on road carries out phase bit comparison, discriminates whether it is transformer fault, if side tripping transformer opposite side
Breaker；When the positive sequence fault component current phase missing of transformer side, which is connected to the circuit positive sequence failure of busbar
The positive sequence fault component electric current that current weight does not lack phase side with transformer makees phase bit comparison；When step down side just
When sequence fault component electric current lacks, by the positive sequence fault component electric current of high voltage side of transformer with low-pressure side bus institute connecting lines just
Sequence fault component electric current makees phase bit comparison；Explanation is busbar or transformer fault if phase is all opposite, first tripping low-voltage bus bar
The breaker between transformer；Reuse the positive sequence fault component electric current and low-voltage bus bar institute connecting lines of high voltage side of transformer
Positive sequence fault component electric current carries out phase bit comparison, discriminates whether it is transformer fault, if side tripping transformer opposite side is breaking
Device；
B) positive sequence fault component current phase in busbar one end lacks
When positive sequence fault component current phase missing of the high voltage bus close to transformer side, by step down side just
Sequence fault component electric current and the positive sequence fault component electric current of high-voltage side bus institute connecting lines make phase bit comparison；If phase directional all phases
It is anti-then explanation is busbar or transformer fault, breaker between first tripping busbar and transformer；Again by step down side just
Sequence fault component electric current and the positive sequence fault component electric current of high-voltage side bus institute connecting lines make phase bit comparison, discriminate whether it is transformation
Device failure, if then tripping transformer opposite side breaker；When low-voltage bus bar is close to the positive sequence fault component electric current of transformer side
When phase lacks, by the positive sequence fault component electric current of high voltage side of transformer and the positive sequence fault component of low-pressure side bus institute connecting lines
Electric current makees phase bit comparison；Explanation is busbar or transformer fault if phase directional is all opposite, first tripping busbar and transformer it
Between breaker；Again by the positive sequence fault component electric current of high voltage side of transformer and the positive sequence fault component of low-pressure side bus institute connecting lines
Electric current makees phase bit comparison, discriminates whether it is transformer fault, if then tripping transformer opposite side breaker；
C) positive sequence fault component current phase in circuit one end lacks
The positive sequence fault component current phase missing of circuit local terminal, by the circuit opposite end positive sequence fault component electric current and its institute
Even the positive sequence fault component electric current of busbar and progress phase bit comparison, are failure if opposite in phase and the circuit of current amplitude maximum
Circuit；
The positive sequence fault component current phase missing of circuit opposite end, by the positive sequence fault component electric current of the circuit local terminal and its
The positive sequence fault component electric current of his circuit carries out phase bit comparison, if phase is all opposite with All other routes and the line of current amplitude maximum
Lu Zewei faulty lines；
(2) phase information mistake
A) during transformer fault
There is mistake in certain one end fault current phase information at transformer both ends, causes to be mistaken for bus-bar fault, first tripping
Breaker between fault bus and transformer；If two transformers to same bussed supply, compare two transformers with
The amplitude of electric current between fault bus, the breaker between first trip currents amplitude larger a side bus and transformer；Again will
Fault current phase information does not occur the side of mistake and carries out phase with the positive sequence fault component electric current of fault bus institute connecting lines
Compare, if phase is almost identical, illustrate it is transformer fault, tripping transformer opposite side breaker；
B) during high voltage bus failure
High voltage bus malfunctions close to transformer side fault current phase information, causes to be mistaken for transformer fault, compares change
Depressor both sides current amplitude, the larger high voltage side of transformer breaker of preferential tripping amplitude, recycles step down side and height
The fault current phase of pressure busbar institute connecting lines is made comparisons, if direction is not much different, explanation is high voltage bus failure, tripping and height
Press the relevant all breakers of busbar；
High voltage bus inlet wire anisotropy, is mistaken for inlet wire failure, breaker between first tripping inlet wire and high voltage bus, then
Secondary carry out fault distinguishing, determines high voltage bus failure, tripping and the relevant all breakers of high voltage bus；
C) during low-pressure side bus failure
Low-voltage bus bar malfunctions close to transformer side fault current phase information, causes to be mistaken for transformer fault, compares stream
Cross the amplitude of transformer both sides electric current, the larger low-pressure side breaker of first trip currents amplitude；Recycle high voltage side of transformer with
The fault current component of low-voltage bus bar institute connecting lines carries out phase bit comparison, can determine low-voltage bus bar failure, tripping and its phase
All breakers even；
During low-pressure side line fault current phase information mistake, line fault is judged to, the breaker of first tripping faulty line,
Fault distinguishing is carried out again, is determined as low-voltage bus bar failure, tripping and the relevant all breakers of low-voltage bus bar；
D) during line fault
During line fault current phase information mistake, first more each bar line current amplitude, first cuts off the larger line of amplitude
Road, then carry out fault distinguishing；
According to above-mentioned steps, transformer fault, tripping transformer both ends breaker are determined.Fig. 3, Fig. 4 are respectively IED defeated
Transformer both ends positive sequence fault component current phase comparison value, the analogous diagram of breaker output valve gone out.
Embodiment 2：
Embodiment 2 provides a kind of intelligent substation integration protection method, break down in substation transformer T1 and
The differentiation of fault element, includes the following steps when the fault phase information of IED30 collections is lost：
Gather positive sequence fault component current information, the positive sequence fault component current phase at more each element both ends, according to event
Barrier element discrimination principle is determined as low-voltage bus bar or transformer T1 failures, the open circuit between first tripping transformer and low-voltage bus bar
Device.Fig. 5, Fig. 6, Fig. 7, Fig. 8 are the positive sequence fault component current phase of the high voltage side of transformer and low-pressure side circuit of IED29 outputs
Fiducial value analogous diagram；Fig. 9 is the analogous diagram of the step down side breaker output valve of IED29 outputs；
Positive sequence fault component current information is gathered again, utilizes the positive sequence fault component electric current and low pressure of high voltage side of transformer
The positive sequence fault component electric current of busbar institute connecting lines carries out phase bit comparison, and transformer T1 is determined as according to fault element discrimination principle
Failure, tripping transformer T1 high-pressure sides breaker；Figure 10, Figure 11, Figure 12, Figure 13 are tripping transformer T1 low-pressure side breakers
Afterwards, the positive sequence fault component current phase comparison value analogous diagram of the high voltage side of transformer and low-pressure side circuit of IED29 outputs；Figure 14
After tripping transformer T1 low-pressure side breakers, the analogous diagram of the high voltage side of transformer breaker output valve of IED29 outputs.
Embodiment 3：
Embodiment 3 provides a kind of intelligent substation integration protection method, break down in substation transformer T1 and
The differentiation of fault element, includes the following steps during the Low-side faults phase information mistake of IED30 collections：
Gather positive sequence fault component current information, the positive sequence fault component current phase at more each element both ends, according to event
Barrier element discrimination principle is determined as low-voltage bus bar failure, and according to phase information and fault current amplitudes information, first tripping low pressure is female
Breaker between line and transformer T1.Figure 15, Figure 16, Figure 17, Figure 18 be IED29 output low-voltage bus bar and its circuit just
The analogous diagram of sequence fault component current phase comparison value；Figure 19 is the emulation of the low-voltage bus bar breaker output valve of IED29 outputs
Figure；
Positive sequence fault component current information is gathered again, utilizes the positive sequence fault component electric current and low pressure of high voltage side of transformer
The positive sequence fault component electric current of busbar institute connecting lines carries out phase bit comparison, and transformer T1 is determined as according to fault element discrimination principle
Failure, tripping transformer T1 high-pressure sides breaker；Figure 20, Figure 21, Figure 22, Figure 23 are tripping transformer T1 low-pressure side breakers
Afterwards, the high voltage side of transformer and the analogous diagram of the positive sequence fault component current phase comparison value of low-pressure side circuit of IED29 outputs；Figure
24 be the analogous diagram of the transformer T1 high-pressure sides breaker output valve of IED29 outputs.
Embodiment 4：
Embodiment 4 provides a kind of intelligent substation integration protection method, break down in substation's high voltage bus and
There is the differentiation of fault element during mistake in the phase information of IED1 collections, includes the following steps：
Gather positive sequence fault component current information, the positive sequence fault component current phase at more each element both ends, according to event
Barrier element discrimination principle is determined as transformer T2 failures, and according to phase information and fault current amplitudes information, first tripping high pressure is female
Breaker between line and transformer T2.Figure 25, Figure 26 are respectively the positive sequence fault component electric current at the transformer both ends of IED outputs
The analogous diagram of phase fiducial value and the analogous diagram of breaker output valve；
Positive sequence fault component current information is gathered again, utilizes the positive sequence fault component electric current and high pressure of step down side
The positive sequence fault component electric current of busbar institute connecting lines carries out phase bit comparison, and high voltage bus is determined as according to fault element discrimination principle
Failure, the tripping breaker associated with high voltage bus；Figure 27, Figure 28 are IED2 after the breaker of tripping transformer T2 high-pressure sides
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 transformer T2 low-pressure side breaker output valves 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 both ends
Phase feature, carries out phase bit comparison and forms fault distinguishing principle, and the phase information gathered with reference to intelligent electronic device (IED) differentiates
Fault element.When the phase information missing or mistake of intelligent electronic device (IED) collection, expand intelligent electronic device (IED)
Identification region in phase information and current magnitude information, with reference to predetermined action decision-making, remain to rapidly cut off failure member
Part.Fault element differentiation can be made to the transformer in intelligent substation, busbar, circuit at the same time, different previous methods are only
This method is scientific and reasonable to be differentiated to a kind of fault element, is calculated simply, simple and easy to do, it is accurate to differentiate, strong applicability, sensitivity
Height, has certain fault-tolerance.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (1)
1. a kind of intelligent substation integration protection method, it is characterized in that, it includes the following steps：
1) the positive sequence fault component current phase feature at fault element both ends is utilized, phase bit comparison is carried out and forms fault distinguishing original
Then, the phase information Judging fault element gathered with reference to intelligent electronic device (IED)
The positive sequence fault component electric current positive direction that regulation flows through protective device is to be directed toward circuit from busbar；When circuit, busbar, transformation
When troubles inside the sample space occurs for device, the positive sequence fault current phase at its both ends is not much different；When external area error occurs, its both ends is just
Sequence fault current phase is differed close to 180 °；Therefore, failure and non-is distinguished using the phase feature of positive sequence fault component electric current
Fault element；The current amplitude of simultaneous faults point is also the largest, and amplitude information is used for strengthening to the reliability of phase criterion；
Access line both ends, the positive sequence of transformer both ends, busbar on the coupled feeder line in transformer side and mother respectively
Fault component electric current carries out phase bit comparison, if current phase is not much different, illustrates that the element road is broken down；If current phase
Difference is close to 180 °, then external area error occurs for explanation, and criterion is formula (1), formula (2)；
In formula：The respectively positive sequence fault component electric current at element both ends；
2) when the phase information missing or mistake of intelligent electronic device (IED) collection, the knowledge of intelligent electronic device (IED) is expanded
Phase information and current magnitude information in other region, with reference to predetermined action decision-making, remain to rapidly cut off fault element；
(1) phase information lacks
A) positive sequence fault component current phase in transformer side lacks
When the positive sequence fault component current phase missing of transformer side, which is connected to the circuit positive sequence fault component of busbar
The positive sequence fault component electric current that electric current does not lack phase side with transformer makees phase bit comparison, discriminates whether it is transformer fault,
If then tripping transformer opposite side breaker；
B) positive sequence fault component current phase in busbar one end lacks
When positive sequence fault component current phase missing of the high voltage bus close to transformer side, by the positive sequence event of step down side
Barrier current weight and the positive sequence fault component electric current of high-voltage side bus institute connecting lines make phase bit comparison；Illustrate if phase is all opposite
It is busbar or transformer fault, breaker between first tripping busbar and transformer；Again by the positive sequence failure point of step down side
Amount electric current and the positive sequence fault component electric current of high-voltage side bus institute connecting lines make phase bit comparison, discriminate whether it is transformer fault,
If then tripping transformer opposite side breaker；When low-voltage bus bar is lacked close to the positive sequence fault component current phase of transformer side
When, the positive sequence fault component electric current of high voltage side of transformer and the positive sequence fault component electric current of low-pressure side bus institute connecting lines are made into phase
Bit comparison；Explanation is busbar or transformer fault if phase is all opposite, breaker between first tripping busbar and transformer；Again will
The positive sequence fault component electric current of high voltage side of transformer makees phase ratio with the positive sequence fault component electric current of low-pressure side bus institute connecting lines
Compared with discriminating whether it is transformer fault, if then tripping transformer opposite side breaker；
C) positive sequence fault component current phase in circuit one end lacks
The positive sequence fault component current phase missing of circuit local terminal, connects mother by the circuit opposite end positive sequence fault component electric current with it
The positive sequence fault component electric current of line and progress phase bit comparison, are fault wire if opposite in phase and the circuit of current amplitude maximum
Road；
The positive sequence fault component current phase missing of circuit opposite end, by the positive sequence fault component electric current of the circuit local terminal and other lines
The positive sequence fault component electric current on road carries out phase bit comparison, and if the circuit of current amplitude maximum all opposite with All other routes if phase
For faulty line；
(2) phase information mistake
A) during transformer fault
There is mistake in certain one end fault current phase information at transformer both ends, causes to be mistaken for bus-bar fault, first tripping failure
Breaker between busbar and transformer；If two transformers compare two transformers and failure to same bussed supply
The amplitude of electric current between busbar, the breaker between first trip currents amplitude larger a side bus and transformer；Again by failure
Current phase information does not occur the side of mistake and the positive sequence fault component electric current progress phase bit comparison of fault bus institute connecting lines,
If phase is almost identical, illustrate it is transformer fault, tripping transformer opposite side breaker；
B) during high voltage bus failure
High voltage bus malfunctions close to transformer side fault current phase information, causes to be mistaken for transformer fault, compares transformer
Both sides current amplitude, the larger high voltage side of transformer breaker of preferential trip currents amplitude, recycles step down side and height
The fault current phase of pressure busbar institute connecting lines is made comparisons, if phase is not much different, explanation is high voltage bus failure, tripping and height
Press the relevant all breakers of busbar；
High voltage bus phase entry mistake, is mistaken for inlet wire failure, breaker between first tripping inlet wire and high voltage bus, again into
Row fault distinguishing, determines high voltage bus failure, tripping and the relevant all breakers of high voltage bus；
C) during low-pressure side bus failure
Low-voltage bus bar malfunctions close to transformer side fault current phase information, causes to be mistaken for transformer fault, compares and flow through change
The amplitude of depressor both sides electric current, the larger low-pressure side breaker of first tripping transformer current amplitude；Recycle high voltage side of transformer
Carry out phase bit comparison with the fault current component of low-voltage bus bar institute connecting lines, can determine low-voltage bus bar failure, tripping and its
Connected all breakers；
During low-pressure side line fault current phase information mistake, line fault is judged to, the breaker of first tripping faulty line, again
Fault distinguishing is carried out, is determined as low-voltage bus bar failure, tripping and the relevant all breakers of low-voltage bus bar；
D) scientific and reasonable during line fault, it is accurate to differentiate, strong applicability, high sensitivity
During line fault current phase information mistake, first more each bar line current amplitude, first cuts off the larger circuit of amplitude, then
Carry out fault distinguishing.
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