CN109283406A - Current loop based on whole station date comprision monitors system - Google Patents
Current loop based on whole station date comprision monitors system Download PDFInfo
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- CN109283406A CN109283406A CN201810916781.7A CN201810916781A CN109283406A CN 109283406 A CN109283406 A CN 109283406A CN 201810916781 A CN201810916781 A CN 201810916781A CN 109283406 A CN109283406 A CN 109283406A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses the current loops in whole station date comprision to monitor system, including a kind of current sampling module, a kind of current sampling module is used to acquire the single current data of substation being individually spaced, and the collected current data of institute is transmitted to a kind of current sample judgment module, by a kind of current sample judgment module, to judge, whether collected current data value is correct, and the current data value of mistake is transmitted to current sample and concentrates judgment means, two class current sampling modules are used to acquire the more than two current datas of substation being individually spaced, and the collected current data of institute is transmitted to two class current sample judgment modules, by two class current sample judgment modules, to judge, whether collected current data value is correct.This system passes through using a kind of relationship, two class relationships, carries out differentiation in contrast, avoids accidentally alerting, and improves the accuracy of alarm, and carry out laterally longitudinal comparative analysis using the current data of whole station, finds out fault point.
Description
Technical field
The present invention relates to technical field of electric power, and in particular to a kind of current loop monitoring based on whole station date comprision
System.
Background technique
The secondary circuit monitoring method of existing current transformer has the fundamental surveillance of the secondary devices such as protection, observing and controlling, but
Its monitoring accuracy is low, can only monitor the failure of current loop open circuit.Such as the breakage lock device side TA of the route protection of the auspicious relay protection in south
Method is as follows:
1, self-produced zero-sequence current is self-produced less than 0.75 times less than 0.75 times of external zero-sequence current or external zero-sequence current
Zero-sequence current, delay 200ms hair TA broken string abnormal signal；
2, there is self-produced zero-sequence current without residual voltage, and an at least phase is then delayed 10 seconds hair TA broken strings extremely without stream
Signal.
3, TA breaks moment, and the initiating element and differential relay for side of breaking may act, but the initiating element of opposite side is not
Movement will not send out differential protection action signal to this side, to guarantee that longitudinal differential will not malfunction.It is reported after being delayed non-broken string side
" having poor stream for a long time " makees same processing with TA broken string.
But the above method has following defects that
1, the interference in effective monitoring current circuit can not effectively be monitored.If certain 500kV main transformer in 2004 is in line fault
Malfunction, here it is scurry into interference electric current due to current loop to lead to false protection.But protective device can not correctly judge.
2, can not judge the case where shunting: as repeatedly occurred, operating personnel's mistake is short, accidentally touches CT secondary circuit, leads to secondary returning
Road current break, leads to false protection.
3, it can not judge the situation of CT winding connection mistake: such as certain 500kV protection misuse observing and controlling winding, in route event
When barrier, since CT winding is saturated, lead to false protection.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, provide a kind of based on whole station date comprision
Current loop monitors system, to improve the accuracy of monitoring.
To achieve the above object, the technical scheme is that
Current loop based on whole station date comprision monitors system, including a kind of current sampling module, two class electric currents
Sampling module, a kind of current sample judgment module, second-rate current sample judgment module and current sample concentrate judgment means；Its
In,
One kind current sampling module is used to acquire the single current data of substation being individually spaced, and will be acquired
To current data be transmitted to a kind of current sample judgment module, it is collected to judge by a kind of current sample judgment module
Whether current data value is correct, and the current data value of mistake is transmitted to current sample and concentrates judgment means, by current sample
Judgment means are concentrated to judge the data of fault moment；
The two classes current sampling module is used to acquire the more than two current datas being individually spaced of substation, and by institute
Collected current data is transmitted to two class current sample judgment modules, judges to be acquired by two class current sample judgment modules
Whether the current data value arrived is correct, and the current data value of mistake is transmitted to current sample and concentrates judgment means, by electric current
Judgment means judge the data of fault moment in sampling set.
The current sample concentration judgment means judge the data of fault moment specifically:
When current convergence processing unit receives fault recorder data, lookup is set time first, and searching fault moment is
No there are the fault recorder datas of other equipment, if any then into comparing logic；Electric current is judged according to comparing result
Data whether there is failure, there are failures, then alarm, and export and to result.
One kind current sample judgment module judges a kind of current sampling module institute by Kirchhoff's current law (KCL)
Whether collected current data value is correct, specific Rule of judgment are as follows:
Electric current and relationship: line current is the vector sum of two switching currents；The electric current of route opposite side and this side electric current phase
Deng；The electric current of reactor high-pressure side and low-pressure side should be equal；Each side electric current of transformer and transformer voltage ratio are directly proportional: transformer
High-pressure side and low-pressure side current relationship by weight of its no-load voltage ratio carries out, the amplitude after conversion is answered equal；
It is each to be spaced the amplitude for transferring out electric current if no data mistake after above-mentioned Rule of judgment judgement
Data, the amplitude of the electric current, according to the set time of GPS time data or export average value in certain time or defeated
Maximin in certain time out；If there is there are errors for data, then by relevant interval data in a manner of total evidence
Output.
The two classes current sample judgment module judges that the collected current data value of two class power supply sampling apparatuses is
No correct method are as follows: whether more more than two current data data are all identical, if all identical, then it represents that correct；
Or judge whether each current data value is correct according to following Rule of judgment:
Electric current and relationship: line current is the vector sum of two switching currents；The electric current of route opposite side and this side electric current phase
Deng；The electric current of reactor high-pressure side and low-pressure side should be equal；Each side electric current of transformer and transformer voltage ratio are directly proportional: transformer
High-pressure side and low-pressure side current relationship by weight of its no-load voltage ratio carries out, the amplitude after conversion is answered equal；
It is each to be spaced the amplitude for transferring out electric current if no data mistake after above-mentioned Rule of judgment judgement
Data, the amplitude of the electric current, according to the set time of GPS time data or export average value in certain time or defeated
Maximin in certain time out；If there is there are errors for data, then by relevant interval data in a manner of total evidence
Output.
One kind current sampling module includes several measure and control devices, several wave recording devices and several PMU devices；It is described
Several measure and control devices are connected by monitoring system interchanger with a kind of current sample judgment module, and several wave recording devices pass through record
Wave interchanger is connected with a kind of current sample judgment module, and several PMU devices are sentenced by PMU interchanger and a kind of current sample
Disconnected module is connected.
The two classes current sampling module includes the protective device and stability control equipment of double sets or more, guarantors more than double sets
Protection unit is connected respectively by interchanger information-preserving with stable interchanger to sample judgment module with two classes with stability control equipment.
Compared with prior art, the present invention the beneficial effect is that:
This system passes through using a kind of relationship, two class relationships, carries out differentiation in contrast, avoids accidentally alerting, improve the standard of alarm
True property, and laterally longitudinal comparative analysis is carried out using the current data of whole station, find out fault point.
Detailed description of the invention
Fig. 1 is that the current loop provided in an embodiment of the present invention based on whole station date comprision monitors system composition signal
Figure；
Fig. 2 is whole station conspectus.
Specific embodiment
The contents of the present invention are described in further details with reference to the accompanying drawings and detailed description.
Embodiment:
As shown in fig.1, the current loop provided in this embodiment based on whole station date comprision monitors system, including
A kind of current sampling module, two class current sampling modules, a kind of current sample judgment module, second-rate current sample judgment module with
And current sample concentrates judgment means.
Wherein, which is used to acquire the single current data being individually spaced of substation, and by institute
Collected current data is transmitted to a kind of current sample judgment module, judges to be acquired by a kind of current sample judgment module
Whether the current data value arrived is correct, and the current data value of mistake is transmitted to current sample and concentrates judgment means, by electric current
Judgment means judge the data of fault moment in sampling set；
And the two classes current sampling module is used to acquire the more than two current datas being individually spaced of substation, and by institute
Collected current data is transmitted to two class current sample judgment modules, judges to be acquired by two class current sample judgment modules
Whether the current data value arrived is correct, and the current data value of mistake is transmitted to current sample and concentrates judgment means, by electric current
Judgment means judge the data of fault moment in sampling set.
It follows that this system passes through using a kind of relationship, two class relationships, differentiation in contrast is carried out, avoids accidentally alerting, improved
The accuracy of alarm, and laterally longitudinal comparative analysis is carried out using the current data of whole station, find out fault point.
Specifically, above-mentioned current sample concentration judgment means judge the data of fault moment specifically:
When current convergence processing unit receives fault recorder data, lookup is set time first, and searching fault moment is
No there are the fault recorder datas of other equipment, if any then into comparing logic；Electric current is judged according to comparing result
Data whether there is failure, there are failures, then alarm, and export and to result.That is, by utilizing a kind of relationship, two
Class relationship carries out differentiation in contrast, avoids accidentally alerting, improve the accuracy of alarm.
Wherein, the collected data being individually spaced of one kind current sampling module generally only have list covering device, such as survey
Device, (failure) wave recording device, PMU device etc. are controlled, the measure and control device, (failure) wave recording device, PMU device are respectively arranged with
Several sets are judged by monitoring system interchanger, recording interchanger, PMU interchanger with corresponding a kind of current sample respectively
Module is connected；One kind current sample judgment module then judges a kind of current sampling module by Kirchhoff's current law (KCL)
Collected current data value it is whether correct, specific Rule of judgment are as follows:
1, electric current and relationship: such as the vector sum that line current is two switching currents: route master one, the master of 1 line of Tathagata Chinese parasol tree
Two, main three, the electric currents such as auxiliary A, auxiliary B, stable A, stable B, failure wave-recording, PMU, metering should be equal to 5031 switching currents and
5032 switching currents and.
2, the electric current of route opposite side is equal with this side electric current (should subtract the capacitance current of route, the influence of reactive current).
3, the electric current of reactor high-pressure side and low-pressure side should be equal.
4, each side electric current of transformer and transformer voltage ratio are directly proportional: the high-pressure side of transformer and low-pressure side current relationship according to
Its no-load voltage ratio converts, and the amplitude after conversion is answered equal.
After above-mentioned judgement, if no data mistake, according to main wiring diagram, each interval transfers out electric current
Amplitude data.The amplitude of the electric current can also export in certain time according to the data of the set time of GPS time
Average value can also export the maximin in certain time.
The fault recorder data of fault moment is transmitted to current convergence processing unit simultaneously by such device, makes current convergence
Processing unit judges the data of fault moment.
If there is there are errors for data, then relevant interval data is exported in a manner of total evidence.Facilitate into next
The comparative analysis of step.
And the two above-mentioned collected data being individually spaced of class current sample judgment module generally have duplicating device or with
On, such as several protective devices, stability control equipment, correspondingly, several protective devices, stability control equipment pass through exchange information-preserving respectively
Machine is connected with stable interchanger with corresponding two classes current sample judgment module, which is collected
Current data value can directly by comparison two sets be spaced data it is whether identical, that is, can determine whether data normal.
Can judge whether each sampled data of electric current is accurate according to following relationship simultaneously.
1, electric current and relationship: such as the vector sum that line current is two switching currents: as shown in Fig. 2, carrying out the route of 1 line of Chinese parasol tree
Main one, the electric currents such as master two, master three, auxiliary A, auxiliary B, stable A, stable B, failure wave-recording, PMU, metering should be equal to 5031 switches
Electric current and 5032 switching currents and.
2, the electric current of route opposite side is equal with this side electric current (should subtract the capacitance current of route, the influence of reactive current).
3, the electric current of reactor high-pressure side and low-pressure side should be equal.
4, each side electric current of transformer and transformer voltage ratio are directly proportional: the high-pressure side of transformer and low-pressure side current relationship according to
Its no-load voltage ratio converts, and the amplitude after conversion is answered equal.
After above-mentioned judgement, if no data mistake, according to main wiring diagram, each interval transfers out electric current
Amplitude data.The amplitude of the electric current can also export in certain time according to the data of the set time of GPS time
Average value can also export the maximin in certain time.
If there is there are errors for data, then relevant interval data is exported in a manner of total evidence.Facilitate into next
The comparative analysis of step.
The fault recorder data of fault moment is transmitted to current convergence processing unit simultaneously by such device, makes current convergence
Processing unit judges the data of fault moment.
That is, above-mentioned current sample concentrates judgment means to be mainly used for a kind of, two class current samples judging mould
The data of block carry out Comprehensive Correlation discriminatory analysis.Since each interval there are corresponding data at this time, need to only be connect according to master
The each spacing current amplitude of the model comparative analysis of line.
Specifically, the equal decision logic of current data are as follows:
When its error within the allowable range when, then be judged as normal.When its error is outside allowed band, then it is judged as different
Often.
Ax=| I1A |-| I2A |；Bx=| I1B |-| I2B |；Cx=| I1C |-| I2C |；Ay=∠ I1A-I2A；By=∠
I1B-I2B；Cy=∠ I1C-I2C；
Work as ax, bx, cx, ay, by when cy is all less than setting value, then judge that it is normal, be otherwise judged as abnormal.Wherein
Ax, bx, cx are amplitude error, and ay, by, cy is angular error.When alternating current amplitude is within the scope of 0.05~20In, with respect to accidentally
Difference is no more than 2.5% or when absolute error is not more than 0.01In, as alarm 1；(it can also refer to miscellaneous stipulations when exceeding following table
Set), then as alarm 2.
It follows that the present invention has a characteristic that
1, laterally longitudinal comparative analysis is carried out using the current data of whole station, finds out fault point.
2, using a kind of relationship, two class relationships, differentiation in contrast is carried out, avoids accidentally alerting, improves the accuracy of alarm.
3, comprehensive comparative analysis is carried out using the amplitude of electric current, angle, finds out fault point.
4, it is alarmed using two-stage, accomplishes to prevent in advance, alarm in advance.
Therefore, compared with prior art, the present invention having following technical advantage:
1, monitoring sensitivity is high, can effective subtle defect.
2, it can find that secondary loop of mutual inductor insulate low problem.And existing technology can not find that the type lacks
It falls into.
3, monitoring velocity is fast.Judge speed much higher than existing device.
Simply to illustrate that technical concepts and features of the invention, its purpose is allows in the art above-described embodiment
Those of ordinary skill cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent changes or modifications that the essence of content according to the present invention is made, should be covered by the scope of protection of the present invention.
Claims (6)
1. current loop based on whole station date comprision monitors system, which is characterized in that including a kind of current sampling module,
Two class current sampling modules, a kind of current sample judgment module, second-rate current sample judgment module and current sample concentration are sentenced
Disconnected device；Wherein,
One kind current sampling module is used to acquire the single current data of substation being individually spaced, and institute is collected
Current data is transmitted to a kind of current sample judgment module, by a kind of current sample judgment module to judge collected electric current
Whether data value is correct, and the current data value of mistake is transmitted to current sample and concentrates judgment means, is concentrated by current sample
Judgment means judge the data of fault moment；
The two classes current sampling module is used to acquire the more than two current datas of substation being individually spaced, and will be acquired
To current data be transmitted to two class current sample judgment modules, it is collected to judge by two class current sample judgment modules
Whether current data value is correct, and the current data value of mistake is transmitted to current sample and concentrates judgment means, by current sample
Judgment means are concentrated to judge the data of fault moment.
2. the current loop based on whole station date comprision monitors system as described in claim 1, which is characterized in that described
Current sample concentration judgment means judge the data of fault moment specifically:
When current convergence processing unit receives fault recorder data, lookup is set time first, searches whether fault moment is deposited
In the fault recorder data of other equipment, if any then into comparing logic；Current data is judged according to comparing result
With the presence or absence of failure, there are failures, then alarm, and export and to result.
3. the current loop based on whole station date comprision monitors system as claimed in claim 1 or 2, which is characterized in that
One kind current sample judgment module judges that a kind of current sampling module institute is collected by Kirchhoff's current law (KCL)
Current data value it is whether correct, specific Rule of judgment are as follows:
Electric current and relationship: line current is the vector sum of two switching currents；The electric current of route opposite side is equal with this side electric current；Electricity
The electric current of anti-device high-pressure side and low-pressure side should be equal；Each side electric current of transformer and transformer voltage ratio are directly proportional: the height of transformer
Press side and low-pressure side current relationship by weight of its no-load voltage ratio carries out, the amplitude after conversion is answered equal；
It is each to be spaced the amplitude data for transferring out electric current if no data mistake after above-mentioned Rule of judgment judgement,
The amplitude of the electric current, according to the set time of GPS time data or export the average value in certain time or export certain
Maximin in the section time；If there is there are errors for data, then relevant interval data is exported in a manner of total evidence.
4. the current loop based on whole station date comprision monitors system as claimed in claim 1 or 2, which is characterized in that
The two classes current sample judgment module judges whether the collected current data value of two class power supply sampling apparatuses is correct
Method are as follows: whether more more than two current data data are all identical, if all identical, then it represents that correct；
Or judge whether each current data value is correct according to following Rule of judgment:
Electric current and relationship: line current is the vector sum of two switching currents；The electric current of route opposite side is equal with this side electric current；Electricity
The electric current of anti-device high-pressure side and low-pressure side should be equal；Each side electric current of transformer and transformer voltage ratio are directly proportional: the height of transformer
Press side and low-pressure side current relationship by weight of its no-load voltage ratio carries out, the amplitude after conversion is answered equal；
It is each to be spaced the amplitude data for transferring out electric current if no data mistake after above-mentioned Rule of judgment judgement,
The amplitude of the electric current, according to the set time of GPS time data or export the average value in certain time or export certain
Maximin in the section time；If there is there are errors for data, then relevant interval data is exported in a manner of total evidence.
5. the current loop based on whole station date comprision monitors system as described in claim 1, which is characterized in that described
A kind of current sampling module includes several measure and control devices, several wave recording devices and several PMU devices；Several measure and control devices
It is connected by monitoring system interchanger with a kind of current sample judgment module, several wave recording devices pass through recording interchanger and one
Class current sample judgment module is connected, and several PMU devices are connected by PMU interchanger with a kind of current sample judgment module
It connects.
6. the current loop as claimed in claim 1 or 5 based on whole station date comprision monitors system, which is characterized in that
The two classes current sampling module includes the protective device and stability control equipment of double sets or more, more than double sets protective device and
Stability control equipment is connected respectively by interchanger information-preserving with stable interchanger to sample judgment module with two classes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112083372A (en) * | 2020-08-21 | 2020-12-15 | 深圳供电局有限公司 | Current transformer polarity identification method and system |
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| CN109283406B (en) | 2021-04-23 |
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