CN106226612A - Secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter - Google Patents
Secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter Download PDFInfo
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- CN106226612A CN106226612A CN201610513522.0A CN201610513522A CN106226612A CN 106226612 A CN106226612 A CN 106226612A CN 201610513522 A CN201610513522 A CN 201610513522A CN 106226612 A CN106226612 A CN 106226612A
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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
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to a kind of secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, belong to power supply route protection, bus protection and main transformer protection fault diagnosis technology field.It is characterized in: pincerlike phase meter is connected in parallel PC by interface, PC extracts relevant diagnostic information and makes comparisons with the characteristic quantity of the different faults type in fault type data base, if consistent with a certain fault type, is then diagnosed as this fault type, otherwise then return row again to compare, until having screened.After pincerlike phase meter completes test, utilize test data quickly to realize the diagnosis to secondary wiring of current mutual inductor fault and fault type judges, simple to operate, tracing trouble is quick and precisely, fill up at present to Current Transformer Secondary electric current connection circuit fault diagnosis and fault type selecting without determining the blank of normal process, conveniently fix a breakdown rapidly, it is ensured that the safety of power equipment puts into operation, improve operational reliability.
Description
Technical field
The present invention relates to a kind of secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, belong to electric power and supply
Electric line protection, bus protection exchange secondary circuit failure diagnostic techniques field with main transformer protection.
Background technology
In power system, whether the correct operation of protection device, closely bound up with the current transformer providing protective current.
If the amplitude of protective current and phase place occur that mistake will directly affect the logical operations of protection device, cause protection device malfunction
Make.Visible, it is provided that the current transformer of protective current plays vital effect to power system security, reliably operation.
At present, operation power service regulations specifies, the newly installed or secondary circuit protection device after variation, before formally putting into operation
Phase sequence and the polarity of the secondary current connection circuit of pincerlike phase meter loading tests input protector must be used, verify two
The correctness in primary current loop and reliability.But operation power maintenance at present there is no the normal process determined and can realize electricity
Current transformer secondary current connection circuit carries out fault diagnosis and fault type selecting, and electric power maintenance worker uses pincerlike phase meter to exist
After line test, can only conclude by subjective judgment by rule of thumb, it is difficult to quickly, correctly diagnose and fix a breakdown hidden danger, is unfavorable for electricity
Power is normally, run reliably.Therefore, for the problems referred to above, it is highly desirable to study a kind of secondary wiring of current mutual inductor fault
Diagnostic method, in order to after completing loading tests by pincerlike phase meter, i.e. available test data quickly realize electric current
The diagnosis of mutual inductor secondary connection fault and fault type judge, facilitate staff to get rid of rapidly hidden danger, it is ensured that power equipment
Safety put into operation, improve power system operational reliability.
Summary of the invention
It is an object of the invention to, it is provided that one is filled up during current operation power is safeguarded and connect Current Transformer Secondary electric current
Line loop carries out fault diagnosis and fault type selecting without determining the blank of normal process, it is to avoid subjective judgment is slipped up, easy to operate, examines
Disconnected quickly, accurately, improve maintenance work efficiency and work of electric power system reliability, it is ensured that power equipment run safety based on pincers
The secondary wiring of current mutual inductor method for diagnosing faults of shape phase meter.
The present invention is to realize above-mentioned purpose by the following technical solutions
A kind of secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, hardware includes pincerlike phase meter, PC
Machine；It is characterized in that: pincerlike phase meter is connected in parallel PC by interface, and PC includes fault type data base；PC extracts
Line protective devices or busbar protective device or the relevant diagnostic information of main transformer protection device, to route protection, bus protection and
The secondary current loop of main transformer protection carries out fault diagnosis and fault type selecting；Relevant diagnostic information is submitted to fault diagnosis stream by PC
The characteristic quantity of the different faults type in journey, with fault type data base compares, if with the characteristic quantity of a certain fault type
Unanimously, then it is diagnosed as this fault type, otherwise then returns the characteristic quantity with next fault type and compare, until having screened
Last fault type in fault type data base；If the fault type in fault type data base is all misfitted, can weigh
New step-up error scope, and again return to fault diagnosis flow scheme and carry out fault type selecting, until selecting.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: its bag
Include following steps:
1) diagnostic message is extracted；
2) fault type selecting；
3) fault diagnosis conclusion.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: described
Route protection, the diagnostic message of extraction includes: the active power (P) of other branch roads and reactive power on this branch road place bus
(Q), three-phase current amplitude (IA, IB, IC) and phase place (1,2,3)；
Wherein,1 is the angle between electric current IA delayed reference voltage UA,2 is the folder between electric current IB delayed reference voltage UB
Angle,3 is the angle between electric current IC delayed reference voltage UC, lower same；Diagnose the current transformer two of this route protection accordingly
Secondary wiring correctness, if secondary connection mistake, the fault type that may diagnose that includes: (1) three-phase current unbalance；
(2) A or B or the reverse polarity connection of C phase TA Secondary Winding；(3) reverse polarity connection of AB or BC or CA biphase TA Secondary Winding；(4) ABC
The reverse polarity connection of three-phase TA Secondary Winding；(5) cable core of AB or BC or CA biphase TA Secondary Winding connects instead；(6) ABC three-phase
The cable core of TA Secondary Winding connects instead.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: described
Bus protection, the diagnostic message of extraction includes: introduce the active power (P) of each branch road of busbar protective device and reactive power
(Q)；By pincerlike phase meter obtain the three-phase current amplitude (IA, IB, IC) of tested branch road and phase place (1,2,3)；Simultaneously
Poor flow valuve Icd including busbar protective device liquid crystal display；The fault type being diagnosed to be accordingly is: (1) three-phase current unbalance；
(2) certain branch road A or B or the reverse polarity connection of C phase TA Secondary Winding；(3) pole of certain branch road AB or BC or CA biphase TA Secondary Winding
Property connect anti-；(4) reverse polarity connection of certain branch road ABC three-phase TA Secondary Winding；(5) certain branch road AB or BC or CA biphase TA Secondary Winding
Cable core connect instead；(6) cable core of certain branch road ABC three-phase TA Secondary Winding connects instead；(7) the CT no-load voltage ratio of each branch road is adjusted
Mistake；(8) polarity of mother (or segmentation) TA Secondary Winding is inconsistent with busbar protective device internal rules polarity.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: described
Main transformer protection, the diagnostic message of extraction includes: the high, medium and low three side active power (P) of (1) main transformer and reactive power (Q)；(2)
The three-phase current amplitude (IA, IB, IC) of high, medium and low three sides of main transformer and phase place (1,2,3)；(3) input high-pressure side and middle pressure
The phase 1 of side phase current of the same name, and high-pressure side and the phase 2 of low-pressure side phase current of the same name；(4) main transformer protection device liquid crystal
Poor flow valuve Icd of display；(5) the main transformer mode of connection.The fault type that may diagnose that accordingly is: (1) three-phase current unbalance；
(2) main transformer side A or B or the reverse polarity connection of C phase TA Secondary Winding；(3) main transformer side AB or BC or CA biphase TA Secondary Winding
Reverse polarity connection；(4) reverse polarity connection of main transformer side ABC three-phase TA Secondary Winding；(5) the biphase TA of main transformer side AB or BC or CA
The cable core of Secondary Winding connects instead；(6) cable core of main transformer side ABC three-phase TA Secondary Winding connects instead；(7) main transformer protection
The device mode of connection is adjusted mistake；(8) capacity and CT no-load voltage ratio are adjusted mistake.
The present invention having the beneficial effects that compared with prior art
On-load should can be completed by secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter at pincerlike phase meter
After test, utilize test data quickly to realize the diagnosis to secondary wiring of current mutual inductor fault and fault type judges, operation
Simply, tracing trouble quick and precisely, is filled up during current operation power is safeguarded and is carried out Current Transformer Secondary electric current connection circuit
Fault diagnosis and fault type selecting, without determining the blank of normal process, facilitate staff to get rid of rapidly operation hidden danger, it is ensured that electric power
The safety of equipment puts into operation, and is greatly improved the operational reliability of power system.
Accompanying drawing explanation
Fig. 1 is the workflow schematic diagram of secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter；
Fig. 2 is certain transforming plant primary main electrical scheme schematic diagram；
Fig. 3 is route protection secondary current loop fault diagnostic process schematic diagram；
Fig. 4 is bus protection secondary current loop fault diagnostic process schematic diagram；
Fig. 5 is main transformer protection secondary current loop fault diagnostic process schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail:
Should be based on the secondary wiring of current mutual inductor method for diagnosing faults of pincerlike phase meter, hardware includes pincerlike phase meter, PC；
Pincerlike phase meter is connected in parallel PC by interface, and PC includes fault type data base；PC extract line protective devices or
Busbar protective device or the relevant diagnostic information of main transformer protection device, the secondary to route protection, bus protection and main transformer protection
Current loop carries out fault diagnosis and fault type selecting；PC submits relevant diagnostic information to fault diagnosis flow scheme, with fault type
The characteristic quantity of the different faults type in data base compares, if consistent with the characteristic quantity of a certain fault type, is then diagnosed as
This fault type, on the contrary then return the characteristic quantity with next fault type and compare, until having screened fault type data
Last fault type in storehouse；If the fault type in fault type data base is all misfitted, reconfigurable error model
Enclose, and again return to fault diagnosis flow scheme and carry out fault type selecting, until selecting.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: its bag
Include following steps:
1) diagnostic message is extracted；
2) fault type selecting；
3) fault diagnosis conclusion.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: described
Route protection, the diagnostic message of extraction includes: the active power (P) of other branch roads and reactive power on this branch road place bus
(Q), three-phase current amplitude (IA, IB, IC) and phase place (1,2,3)；
Wherein,1 is the angle between electric current IA delayed reference voltage UA,2 is the folder between electric current IB delayed reference voltage UB
Angle,3 is the angle between electric current IC delayed reference voltage UC, lower same；Diagnose the current transformer two of this route protection accordingly
Secondary wiring correctness, if secondary connection mistake, the fault type that may diagnose that includes:
1) three-phase current unbalance；
2) A or B or the reverse polarity connection of C phase TA Secondary Winding；
3) reverse polarity connection of AB or BC or CA biphase TA Secondary Winding；
4) reverse polarity connection of ABC three-phase TA Secondary Winding；
5) cable core of AB or BC or CA biphase TA Secondary Winding connects instead；
6) cable core of ABC three-phase TA Secondary Winding connects instead.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: described
Bus protection, the diagnostic message of extraction includes: introduce the active power (P) of each branch road of busbar protective device and reactive power
(Q)；By pincerlike phase meter obtain the three-phase current amplitude (IA, IB, IC) of tested branch road and phase place (1,2,3)；Simultaneously
Poor flow valuve Icd including busbar protective device liquid crystal display.The fault type being diagnosed to be accordingly is:
1) three-phase current unbalance；
2) certain branch road A or B or the reverse polarity connection of C phase TA Secondary Winding；
3) reverse polarity connection of certain branch road AB or BC or CA biphase TA Secondary Winding；
4) reverse polarity connection of certain branch road ABC three-phase TA Secondary Winding；
5) cable core of certain branch road AB or BC or CA biphase TA Secondary Winding connects instead；
6) cable core of certain branch road ABC three-phase TA Secondary Winding connects instead；
7) the CT no-load voltage ratio of each branch road is adjusted mistake；
8) polarity of mother (or segmentation) TA Secondary Winding is inconsistent with busbar protective device internal rules polarity.
Described secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, it is characterised in that: described
Main transformer protection, the diagnostic message of extraction includes:
1) the high, medium and low three side active power (P) of main transformer and reactive power (Q)；
2) the three-phase current amplitude (IA, IB, IC) of high, medium and low three sides of main transformer and phase place (1,2,3)；
3) input high-pressure side and the phase 1 of medium voltage side phase current of the same name, and high-pressure side and the phase place of low-pressure side phase current of the same name
φ2；
4) poor flow valuve Icd of main transformer protection device liquid crystal display；
5) the main transformer mode of connection；The fault type that may diagnose that accordingly is:
A) three-phase current unbalance；
B) main transformer side A or B or the reverse polarity connection of C phase TA Secondary Winding；
C) reverse polarity connection of main transformer side AB or BC or CA biphase TA Secondary Winding；
D) reverse polarity connection of main transformer side ABC three-phase TA Secondary Winding；
E) cable core of main transformer side AB or BC or CA biphase TA Secondary Winding connects instead；
F) cable core of main transformer side ABC three-phase TA Secondary Winding connects instead；
G) the main transformer protection device mode of connection is adjusted mistake；
H) capacity and CT no-load voltage ratio are adjusted mistake.
Embodiment
1, see Fig. 2, Fig. 3, as a example by branch road L1, introduce the step of route protection secondary current loop fault diagnosis such as
Under:
(1) diagnostic message is extracted；Concrete diagnostic message such as table 1:
Table 1 diagnostic message summary sheet
(2) startup separator diagnostic process；Fault diagnosis flow scheme is divided into current balance type diagnosis and power to diagnose.
A. current balance type diagnosis refers to: according to the formula of load current degree of unbalancedness, the amplitude of three-phase current is carried out electricity
Mobile equilibrium diagnoses.If three-phase current unbalance degree is less than 10%, then it is directly entered power diagnosis；If more than 10%, then simultaneously entering
Power diagnosis and fault type selecting pattern.
The current unbalance factor that can calculate branch road L1 according to above formula is 1.5%, in range of error, the most directly enters
Enter power diagnosis.
B. power diagnosis refers to: by theoretical load impedance angle and the actual measured value of relatively tested branch road L1 (1,2,3) error between, if error less than ±, then diagnosis is given: wiring is correct；Otherwise, enter fault type selecting pattern.
Wherein, the computational methods of the theoretical load impedance angle of tested branch road L1 are as follows:
Wherein, as P > 0, Q > 0 time,；As P<0, Q>0 time,；When
P < 0, Q < when 0,；As P>0, Q<when 0,, lower same.
Therefore, can calculate according to above formula:
From this it can be concluded that2,3 withOutside range of error, so entering fault type selecting pattern.
(3) startup separator type selecting；
The diagnostic message submitted to1,2,3 meet following formula,
In formula,Parameter value is set for error, is defaulted as 5 °, lower same.
The fault type feature of the reverse polarity connection of i.e. biphase with three-phase current unbalance in data base and BC TA Secondary Winding
Amount is consistent, is therefore diagnosed as this fault.
2, seeing Fig. 2, Fig. 4, the step introducing the diagnosis of bus protection secondary current loop fault is as follows:
(1) diagnostic message is extracted；Concrete diagnostic message such as table 2:
Table 2 diagnostic message summary sheet
(2) startup separator diagnostic process；Fault diagnosis flow scheme is divided into current balance type diagnosis, power diagnosis and difference stream diagnosis.
A. current balance type diagnosis: calculate respectively the current unbalance factor of branch road L1, L2, L3, L4 be respectively 1.5%,
0.6%, 2.8%, 1.6%, in range of error, therefore it is directly entered power diagnosis.
B. power diagnosis: according to the principle of bus power balance, the power sum of each branch road L1, L2, L3, L4 should be zero,
In actual motion, owing to measuring or calculating error, it is desirable to power sum is less than ± 5MW ((MVar).Computing formula is as follows:
Draw after calculating according to above formula:
In the range of error of regulation, then the reference value that the power of each branch road can be diagnosed as bus protection power.
Then relatively tested branch road L1, L2, L3, L4 theoretical load impedance angle and actual measured value (1,2,3) it
Between error, wherein the result of calculation of the theoretical load impedance angle of L1, L2, L3, L4 is respectively as follows: 192.2 °, 10.8 °,
197.5°、16.7°.Result of calculation show error be respectively less than ±, then show that each branch road L1, L2, L3, L4 wiring is correct.
The poorest stream diagnosis, differs from stream diagnosis to difference flow valuve Icd, if this value is less than 100mA, is then diagnosed as wiring correct；
Otherwise, enter fault type selecting pattern.
Icd=0.120A in diagnostic message, beyond the scope of regulation, therefore enters fault type selecting pattern.
(3) startup separator type selecting.
In diagnostic message and data base, " the CT no-load voltage ratio of each branch road is adjusted mistake；Mother (or segmentation) CT polarity and bus are protected
The polarity that protection unit specifies is inconsistent " fault characteristic value consistent, therefore be diagnosed as this fault.
3. seeing Fig. 2, Fig. 5, the step introducing the diagnosis of main transformer protection secondary current loop fault is as follows:
(1) diagnostic message is extracted；Concrete diagnostic message such as table 3:
Table 3 diagnostic message summary sheet
(2) startup separator diagnostic process；Fault diagnosis flow scheme is divided into current balance type diagnosis, power diagnosis, difference stream to diagnose and of the same name
Phase current phase place diagnoses.
A. current balance type diagnosis: the current unbalance factor calculating main transformer three side respectively is respectively 0.6%, 4.5%, 4.4%,
In range of error, therefore it is directly entered power diagnosis.
B. power diagnosis: according to the principle of main transformer three side electric quantity balancing, the power sum of high, medium and low three sides should be zero, in fact
During border is run, owing to measuring or calculating error, it is desirable to the power sum of high, medium and low three sides is less than 5MW ((MVar).Calculate
Formula is as follows:
Draw after calculating according to above formula:
I.e. main transformer three side power sum is in the range of error of regulation, and meanwhile, main transformer three side power meets again table 4 requirement, so
Can be as the reference value of main transformer protection power diagnosis.
Table 4 main transformer each side power is sent relation
Then be respectively compared the theoretical load impedance angle of main transformer three side and actual measured value (1,2,3) error between, its
In, the theoretical load impedance angle result of calculation of main transformer three side is respectively as follows:h=22.1°、m=189.4°、l=190.9°.Show
Error be respectively less than ±, then show that main transformer each side secondary current circuit connection is correct.
The poorest stream diagnosis: Icd=0.152A in diagnostic message, beyond the scope (less than 100mA) of regulation, therefore enters of the same name
Phase current phase place diagnoses.
Phase current phase place the most of the same name diagnoses: refer to the φ 1 in diagnostic message, φ 2 and the fault characteristic value in data base
Compare, if consistent, be judged as the main transformer mode of connection that this feature amount is corresponding.
φ 1 in diagnostic message, φ 2 meets following formula:
In formula,Parameter value is set for error, is defaulted as 5 °.
I.e. consistent with the characteristic quantity of the Yyd1 main transformer mode of connection in data base, therefore this main transformer mode of connection should be Yyd1, with
In diagnostic message, main transformer mode of connection Yyd11 is inconsistent, enters fault type selecting pattern.
(3) startup separator type selecting.
Diagnostic message is consistent with the fault characteristic value of " the Yyd1 main transformer mode of connection " in data base, therefore is diagnosed as main transformer wiring
Mode is adjusted mistake.
If the main transformer mode of connection is consistent with diagnostic result in diagnostic message, when being i.e. Yyd1, illustrate that difference stream is beyond regulation
Scope, mistake that diagnosis is capacity and CT no-load voltage ratio is adjusted.
Should thoroughly avoid manually judging by accident based on the secondary wiring of current mutual inductor method for diagnosing faults of pincerlike phase meter, carry
High fault diagnosis accuracy, it is achieved the secondary current loop of route protection, bus protection and main transformer protection is quickly carried out therefore
Barrier diagnosis and fault type selecting；Simple to operate, it is judged that reliable, the utilization of Hubei Jingzhou City local electricity obtains positive effect,
Conscientiously ensure the reliability service of main transformer protection device, busbar protective device, line protective devices, be greatly improved power system
Reliability of operation, reduces maintenance cost.
The above is presently preferred embodiments of the present invention, and the flesh and blood of the present invention is not made by the example above explanation
Any pro forma restriction, person of an ordinary skill in the technical field is the technology of the foundation present invention after having read this specification
Any simple modification that above detailed description of the invention is made by essence or deformation, and the technology contents possibly also with the disclosure above
Changed or be modified to the Equivalent embodiments of equivalent variations, all still fallen within the range of technical solution of the present invention, without departing from
The spirit and scope of the invention.
Claims (5)
1. a secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter, hardware include pincerlike phase meter and
PC；It is characterized in that: pincerlike phase meter is connected in parallel PC by interface, and PC includes fault type data base；PC carries
Line taking line protection device or busbar protective device or the relevant diagnostic information of main transformer protection device, to route protection, bus protection
And the secondary current loop of main transformer protection carries out fault diagnosis and fault type selecting；PC submits relevant diagnostic information to fault diagnosis
The characteristic quantity of the different faults type in flow process, with fault type data base compares, if with the feature of a certain fault type
Amount is consistent, then be diagnosed as this fault type, otherwise then return the characteristic quantity with next fault type and compare, until screening
Last fault type in complete fault type data base；If the fault type in fault type data base is all misfitted, can
Reset range of error, and again return to fault diagnosis flow scheme and carry out fault type selecting, until selecting.
Secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter the most according to claim 1, it is special
Levy and be: it comprises the steps:
1) diagnostic message is extracted；
2) fault type selecting；
3) fault diagnosis conclusion.
Secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter the most according to claim 1, it is special
Levying and be: described route protection, the diagnostic message of extraction includes: the active power of other branch roads on this branch road place bus
(P) and reactive power (Q), three-phase current amplitude (IA, IB, IC) and phase place (1,2,3)；
Wherein,1 is the angle between electric current IA delayed reference voltage UA,2 is the folder between electric current IB delayed reference voltage UB
Angle,3 is the angle between electric current IC delayed reference voltage UC, lower same；Diagnose the current transformer two of this route protection accordingly
Secondary wiring correctness, if secondary connection mistake, the fault type that may diagnose that includes: (1) three-phase current unbalance；
(2) A or B or the reverse polarity connection of C phase TA Secondary Winding；(3) reverse polarity connection of AB or BC or CA biphase TA Secondary Winding；(4) ABC
The reverse polarity connection of three-phase TA Secondary Winding；(5) cable core of AB or BC or CA biphase TA Secondary Winding connects instead；(6) ABC three-phase
The cable core of TA Secondary Winding connects instead.
Secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter the most according to claim 1, it is special
Levying and be: described bus protection, the diagnostic message of extraction includes: introduce the active power (P) of each branch road of busbar protective device
With reactive power (Q)；By pincerlike phase meter obtain the three-phase current amplitude (IA, IB, IC) of tested branch road and phase place (1,
2,3)；Include poor flow valuve Icd of busbar protective device liquid crystal display simultaneously；The fault type being diagnosed to be accordingly is: (1) three-phase
Current imbalance；(2) certain branch road A or B or the reverse polarity connection of C phase TA Secondary Winding；(3) the biphase TA of certain branch road AB or BC or CA bis-
The reverse polarity connection of secondary winding；(4) reverse polarity connection of certain branch road ABC three-phase TA Secondary Winding；(5) certain branch road AB or BC or CA is biphase
The cable core of TA Secondary Winding connects instead；(6) cable core of certain branch road ABC three-phase TA Secondary Winding connects instead；(7) each branch road
CT no-load voltage ratio is adjusted mistake；(8) polarity of mother (or segmentation) TA Secondary Winding differs with busbar protective device internal rules polarity
Cause.
Secondary wiring of current mutual inductor method for diagnosing faults based on pincerlike phase meter the most according to claim 1, it is special
Levying and be: described main transformer protection, the diagnostic message of extraction includes: high, medium and low three side active power (P) of (1) main transformer and idle
Power (Q)；(2) the three-phase current amplitude (IA, IB, IC) of high, medium and low three sides of main transformer and phase place (1,2,3)；(3) input height
Pressure side and the phase 1 of medium voltage side phase current of the same name, and high-pressure side and the phase 2 of low-pressure side phase current of the same name；(4) main transformer is protected
Poor flow valuve Icd of protection unit liquid crystal display；(5) the main transformer mode of connection；The fault type that may diagnose that accordingly is: (a) three-phase
Current imbalance；(b) main transformer side A or B or the reverse polarity connection of C phase TA Secondary Winding；(c) main transformer side AB or BC or CA
The reverse polarity connection of biphase TA Secondary Winding；The reverse polarity connection of (d) main transformer side ABC three-phase TA Secondary Winding；E () main transformer is a certain
The cable core of side AB or BC or CA biphase TA Secondary Winding connects instead；The cable of (f) main transformer side ABC three-phase TA Secondary Winding
Heart yearn connects instead；G () main transformer protection device mode of connection is adjusted mistake；H () capacity and CT no-load voltage ratio are adjusted mistake.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655789A (en) * | 2017-01-13 | 2017-05-10 | 阳光电源股份有限公司 | Isolated DC-DC converter and control method and system thereof |
| CN107765133A (en) * | 2017-10-20 | 2018-03-06 | 国网湖北省电力公司鄂州供电公司 | A kind of failure detector and method |
| CN108363031A (en) * | 2018-03-05 | 2018-08-03 | 云南电网有限责任公司保山供电局 | A kind of secondary winding in current transformer no-load voltage ratio and polar on-line monitoring method |
| CN109031179A (en) * | 2018-07-04 | 2018-12-18 | 云南电网有限责任公司 | Main transformer CT polarity and protection direction-adaptive method of calibration |
| CN109631733A (en) * | 2018-12-07 | 2019-04-16 | 国网江苏省电力有限公司电力科学研究院 | In be pressed into disk cable conductor performance intelligent detection device and system |
| CN110646692A (en) * | 2019-09-16 | 2020-01-03 | 积成电子股份有限公司 | On-site bus protection automatic on-load test method and test module |
| CN111060846A (en) * | 2019-12-19 | 2020-04-24 | 深圳供电局有限公司 | CT secondary circuit fault on-line monitoring method |
| CN112327235A (en) * | 2020-09-23 | 2021-02-05 | 广州智光电气技术有限公司 | Current transformer fault detection method and device, electronic equipment and storage medium |
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| CN106655789A (en) * | 2017-01-13 | 2017-05-10 | 阳光电源股份有限公司 | Isolated DC-DC converter and control method and system thereof |
| CN106655789B (en) * | 2017-01-13 | 2019-05-31 | 阳光电源股份有限公司 | Isolation type DC-DC converter and its control method and control system |
| CN107765133A (en) * | 2017-10-20 | 2018-03-06 | 国网湖北省电力公司鄂州供电公司 | A kind of failure detector and method |
| CN108363031A (en) * | 2018-03-05 | 2018-08-03 | 云南电网有限责任公司保山供电局 | A kind of secondary winding in current transformer no-load voltage ratio and polar on-line monitoring method |
| CN109031179A (en) * | 2018-07-04 | 2018-12-18 | 云南电网有限责任公司 | Main transformer CT polarity and protection direction-adaptive method of calibration |
| CN109031179B (en) * | 2018-07-04 | 2020-11-24 | 云南电网有限责任公司 | Main transformer CT polarity and protection direction self-adaptive checking method |
| CN109631733A (en) * | 2018-12-07 | 2019-04-16 | 国网江苏省电力有限公司电力科学研究院 | In be pressed into disk cable conductor performance intelligent detection device and system |
| CN110646692A (en) * | 2019-09-16 | 2020-01-03 | 积成电子股份有限公司 | On-site bus protection automatic on-load test method and test module |
| CN110646692B (en) * | 2019-09-16 | 2021-10-01 | 积成电子股份有限公司 | On-site bus protection automatic on-load test method and test module |
| CN111060846A (en) * | 2019-12-19 | 2020-04-24 | 深圳供电局有限公司 | CT secondary circuit fault on-line monitoring method |
| CN111060846B (en) * | 2019-12-19 | 2022-03-22 | 深圳供电局有限公司 | CT secondary circuit fault on-line monitoring method |
| CN112327235A (en) * | 2020-09-23 | 2021-02-05 | 广州智光电气技术有限公司 | Current transformer fault detection method and device, electronic equipment and storage medium |
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