CN109387724A - Based on the lateral modified synchronous capacitor method for diagnosing faults of vertical analysis - Google Patents
Based on the lateral modified synchronous capacitor method for diagnosing faults of vertical analysis Download PDFInfo
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- CN109387724A CN109387724A CN201811154826.8A CN201811154826A CN109387724A CN 109387724 A CN109387724 A CN 109387724A CN 201811154826 A CN201811154826 A CN 201811154826A CN 109387724 A CN109387724 A CN 109387724A
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- phase modifier
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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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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
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Abstract
The invention discloses one kind to be based on vertical analysis laterally modified synchronous capacitor method for diagnosing faults, determines whether separate unit phase modifier generator terminal occurs singlephase earth fault using definite value Vertical Numerical analytic approach, position occurs for positioning failure；Comparison Method is screened using average mean transverse direction screening method or lateral bubbling, determines the raw excitation voltage disturbance of more synchronous capacitors, the position that Location perturbation occurs.Comprehensive analysis phase modifier vertical and horizontal data of the present invention improve the precision of fault diagnosis and location, effectively increase the O&M efficiency of maintenance department to determine whether the influence that generation disturbance and disturbance generate.
Description
Technical field
The present invention relates to operation/maintenance data analytical technologies, and in particular to one kind is based on vertical analysis laterally modified synchronous phase modulation
Machine method for diagnosing faults.
Background technique
Power System Disturbances analysis is that a critical function for monitoring power protection system performance will be right when disturbance occurs
System electrical amount generates different degrees of impact, and by operation/maintenance data of the acquisition phase modifier after grid-connected, making to disturbance accurately has
Fault pre-alarming, fault location and the fault detection of effect guarantee that the stability of synchronous capacitor and connected systems is most important.Point
Analysis both at home and abroad to the research of phase modifier, the longitudinal data of separate unit phase modifier is analyzed it is more, to the cross of more phase modifiers
To data research also not at setting foot in, the accuracy rate of fault detection and positioning is lower.
Summary of the invention
The purpose of the present invention is to provide one kind based on vertical analysis laterally modified synchronous capacitor operation/maintenance data analysis
Method improves the accuracy rate of fault detection and positioning.
The technical solution for realizing the aim of the invention is as follows: one kind is based on vertical analysis laterally modified synchronous capacitor event
Hinder diagnostic method, including following content:
(1) it determines whether separate unit phase modifier generator terminal occurs singlephase earth fault using definite value Vertical Numerical analytic approach, positions
Position occurs for failure；
(2) Comparison Method is screened using average mean transverse direction screening method or lateral bubbling, whether determines more synchronous capacitors
Excitation voltage disturbance, the position that Location perturbation occurs occurs.
As a kind of specific embodiment, definite value Vertical Numerical analytic approach passes through the virtual value for judging three-phase voltage or electric current
Whether range is being limited, phase modifier singlephase earth fault is detected and positioned, if three-phase voltage virtual value meets [Umin,
Umax], and three-phase current virtual value is in [Imin1, Imax1], then determine that singlephase earth fault does not occur for phase modifier generator terminal, otherwise judges
Singlephase earth fault occurs for phase modifier generator terminal, and failure occurs to be less than U in voltage effective valuemin, current effective value is less than Imin1's
Phase, wherein Umin70%~90%, U of set end voltage when being operated normally for phase modifiermaxGenerator terminal electricity when being operated normally for phase modifier
110%~130%, I of pressuremin185%~95%, I of generator terminal electric current when being operated normally for phase modifiermax1It is normally transported for phase modifier
The 105%~115% of generator terminal electric current when row.
As a kind of specific embodiment, average mean transverse direction screening method by generator terminal current effective value after judgement whether
Range is limited, the disturbance of phase modifier excitation is detected and positioned, when there are phase modifier generator terminal current effective values to be greater than Imax2, hair
Pre-warning signal determines that phase modifier is disturbed out, and disturbance occurs to be greater than virtual value mean value I in current effective value12Phase modifier machine
On, wherein Imax2The 110%~130% of electric current when being operated normally for phase modifier.
As a kind of specific embodiment, lateral bubbling screening Comparison Method by generator terminal current effective value after judgement whether
Range is limited, the disturbance of phase modifier excitation is detected and positioned, when there are phase modifier generator terminal current effective values to be greater than Imax2, hair
Pre-warning signal determines that phase modifier is disturbed out, then judges whether phase modifier is equal in synchronization generator terminal electric current, if equal,
Judge that more phase modifiers are all disturbed, otherwise the maximum phase modifier of electric current is all disturbed.
Compared with prior art, the present invention its remarkable advantage: comprehensive analysis phase modifier vertical and horizontal data of the present invention are come
Judge whether that the influence that disturbance and disturbance generate occurs, improves the precision of fault diagnosis and location, effectively increase maintenance portion
The O&M efficiency of door.
Detailed description of the invention
Fig. 1 is the connection topological structure schematic diagram of synchronous capacitor Yu SFC and AC network.
Fig. 2 is the connection topological structure schematic diagram of separate unit synchronous capacitor generator terminal single phase ground fault failure.
Three-phase voltage virtual value waveform when Fig. 3 is synchronous capacitor generator terminal single phase ground fault.
Three-phase current virtual value waveform when Fig. 4 is synchronous capacitor generator terminal single phase ground fault.
Fig. 5 is using vertical analysis data flowchart during definite value Vertical Numerical analytic approach analysis phase modifier generator terminal failure.
Fig. 6 is the connection topological structure schematic diagram that a phase modifier excitation voltage is disturbed in two synchronous capacitors.
Fig. 7 is synchronous capacitor excitation voltage control system output signal schematic diagram.
Fig. 8 is synchronous capacitor excitation voltage by rear generator terminal current effective value waveform.
Fig. 9 is laterally to correct data flowchart during being disturbed using average mean transverse direction screening method analysis phase modifier.
Figure 10 is laterally to correct data flowchart during being disturbed using transverse direction bubbling screening Comparison Method analysis phase modifier.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention program is further illustrated.
The connection circuit diagram for establishing synchronous capacitor Yu SFC (static frequency changer) and AC network, as shown in Figure 1, including
Synchronous capacitor, excitation system, main transformer, grid-connected breaker, AC network, SFC connection breaker and SFC frequency converter.Its
Middle synchronous capacitor generator terminal connection main transformer connects breaker with SFC, and the main transformer other side is connected with grid-connected breaker, and
Net breaker is connect with AC network；The connection breaker other side SFC is connect with SFC frequency converter.Disturbance is divided into electric system
Large disturbances and microvariations, wherein large disturbances include phase modifier generator terminal singlephase earth fault, and microvariations are the disturbances of phase modifier excitation, this
Patent is detected and is positioned mainly for above two disturbance.
The connection topological structure of separate unit synchronous capacitor generator terminal single phase ground fault failure is as shown in Fig. 2, using fixed
Be worth Vertical Numerical analytic approach to during separate unit synchronous capacitor generator terminal single phase ground fault failure voltage, current data into
Row analysis.Assuming that being run in synchronous capacitor to t after phase modifier starting stability of grid connection operation0When, generator terminal occurs the short circuit of A phase and connects
Earth fault, duration t1.Vertical analysis generator terminal electric current and voltage data, when synchronous capacitor generator terminal single phase ground fault
Three-phase voltage, current waveform it is as shown in Figure 3-4, wherein UA、UB、UCRespectively generator terminal three-phase voltage virtual value, IA、IB、ICPoint
It Wei generator terminal three-phase current virtual value, it can be seen that voltage and current is one when synchronous capacitor generator terminal single phase ground fault
In fixed range, therefore judge whether the virtual value of three-phase voltage or electric current is limiting range, failure can be carried out to phase modifier
Early warning and fault detection.
Using vertical analysis data flow during definite value Vertical Numerical analytic approach analysis phase modifier generator terminal singlephase earth fault
As shown in figure 5, working as A phase voltage UALess than UminOr B phase voltage UBGreater than UmaxOr C phase voltage UCGreater than UmaxWhen；Or A phase current
IALess than Imin1Or B phase current IBGreater than Imax1Or C phase current ICGreater than Imax1When, alarm signal is issued, determines phase modifier machine
End is broken down and positioning failure phase.Wherein UminThe 70%~90% of set end voltage (operates normally when operating normally for phase modifier
When set end voltage be Ux), UmaxThe 110%~130% of set end voltage when being operated normally for phase modifier.Imin1It is normally transported for phase modifier
(generator terminal electric current is I to the 85%~95% of generator terminal electric current when normal operation when rowx1), Imax1Generator terminal electricity when being operated normally for phase modifier
The 105%~115% of stream.
According to both at home and abroad the study found that nowadays mostly use one greatly or two phase modifiers extra-high voltage direct-current transmission is given,
Receiving end carries out reactive power support, and three or more, in practical engineering applications almost not at being related to, are below encouraged two phase modifiers
The case where magnetic disturbance, is analyzed.The connection topological structure that a phase modifier excitation voltage is disturbed in two synchronous capacitors
As shown in fig. 6, increasing excitation voltage control system compared to Fig. 1, wherein synchronous capacitor rotor field coil and excitation are electric
Pressure control system is connected, and the other side of excitation voltage control system is alternative excitation input value, using average mean cross
Comparison Method is screened to screening method or lateral bubbling, current data carries out during being disturbed to more synchronous capacitor excitation voltages
Analysis.After phase modifier starts stability of grid connection operation, exciter control system state is operated in, is run in synchronous capacitor to t2When,
Master control selector selection disturbance control system, applies the disturbance voltage of 0.5p.u. to excitation voltage, is applied by sequential control system
Add duration t3, master control selector resets exciter control system and through output control system exports EFreal, synchronous capacitor excitation
Voltage control system output signal as shown in fig. 7, synchronous capacitor excitation voltage by rear generator terminal current effective value waveform such as Fig. 8
It is shown, it can be seen that synchronous capacitor excitation voltage in a certain range, therefore is passed through judgement by rear generator terminal current effective value
Whether generator terminal current effective value is limiting range afterwards, can carry out fault pre-alarming and fault detection to phase modifier.
Data flow such as Fig. 9 institute is laterally corrected during being disturbed using average mean transverse direction screening method analysis phase modifier
Show.In average mean transverse direction screening method, I1And I2Respectively No. 1 and No. 2 phase modifier generator terminal current effective values, I12For No. 1 and No. 2
The mean value of phase modifier generator terminal current effective value, judgement is as No. 1 phase modifier electric current I1Greater than Imax2Or No. 2 phase modifier electric current I2It is greater than
Imax2, issue warning signal determining phase modifier and be disturbed, but which platform uncertain is；Judgement is as No. 1 phase modifier electric current I1Greater than etc.
In I12Or No. 2 phase modifier electric current I2More than or equal to I12, issue alarm signal and position which platform phase modifier is disturbed.Wherein Imax2
(phase modifier electric current is I to the 110%~130% of electric current when normal operation when operating normally for phase modifierx2).Similarly, work as phase modifier
When number of units is 3 or more, still disturbance phase modifier can be analyzed using average mean transverse direction screening method.
Data flow such as Figure 10 institute is laterally corrected during being disturbed using lateral bubbling screening Comparison Method analysis phase modifier
Show.In lateral bubbling screening Comparison Method, judgement is greater than I when No. 1 phase modifier electric currentmax2Or No. 2 phase modifier electric currents are greater than Imax2, hair
Warning information determines that phase modifier is disturbed out, but which platform uncertain is；Judge two phase modifiers in synchronization generator terminal electric current
It is whether equal, when unequal, the maximum value of two phase modifier generator terminal electric currents is taken to judge size, the big person of electric current is the tune that is disturbed
Camera, alert；When equal, it can be determined that two phase modifiers are all disturbed, alert.Similarly, when
When phase modifier number of units is 3 or more, still disturbance phase modifier can be analyzed using lateral bubbling screening Comparison Method.
The present invention analyzes separate unit phase modifier longitudinal direction alert data and more phase modifier transverse direction alert datas, can be failure
Isolation provides strategy instruction, is beneficial to improve maintenance department O&M efficiency.
Claims (4)
1. one kind is based on vertical analysis laterally modified synchronous capacitor method for diagnosing faults, which is characterized in that in following
Hold:
(1) determine whether separate unit phase modifier generator terminal occurs singlephase earth fault, positioning failure using definite value Vertical Numerical analytic approach
Position occurs；
(2) Comparison Method is screened using average mean transverse direction screening method or lateral bubbling, determines whether more synchronous capacitors occur
Excitation voltage disturbance, the position that Location perturbation occurs.
2. according to claim 1 be based on vertical analysis laterally modified synchronous capacitor method for diagnosing faults, feature
It is, definite value Vertical Numerical analytic approach, which passes through, judges whether the virtual value of three-phase voltage or electric current is limiting range, to phase modifier
Singlephase earth fault is detected and is positioned, if three-phase voltage virtual value meets [Umin, Umax], and three-phase current virtual value exists
[Imin1, Imax1], then determine that singlephase earth fault does not occur for phase modifier generator terminal, otherwise judges that single-phase earthing occurs for phase modifier generator terminal
Failure, failure occur to be less than U in voltage effective valuemin, current effective value is less than Imin1Phase, wherein UminIt is normally transported for phase modifier
70%~90%, U of set end voltage when rowmax110%~130%, I of set end voltage when being operated normally for phase modifiermin1To adjust
85%~95%, I of generator terminal electric current when camera operates normallymax1For phase modifier normal operation when generator terminal electric current 105%~
115%.
3. according to claim 1 be based on vertical analysis laterally modified synchronous capacitor method for diagnosing faults, feature
It is, whether average mean transverse direction screening method is limiting range by generator terminal current effective value after judgement, disturbs to phase modifier excitation
It is dynamic to be detected and positioned, when there are phase modifier generator terminal current effective values to be greater than Imax2, issue warning signal determining phase modifier by
To disturbance, disturbance occurs to be greater than virtual value mean value I in current effective value12Phase modifier machine on, wherein Imax2It is normal for phase modifier
The 110%~130% of electric current when operation.
4. according to claim 1 be based on vertical analysis laterally modified synchronous capacitor method for diagnosing faults, feature
It is, whether lateral bubbling screening Comparison Method is limiting range by generator terminal current effective value after judgement, disturbs to phase modifier excitation
It is dynamic to be detected and positioned, when there are phase modifier generator terminal current effective values to be greater than Imax2, issue warning signal determining phase modifier by
To disturbance, then judge whether phase modifier is equal in synchronization generator terminal electric current, if equal, judges that more phase modifiers are all disturbed
Dynamic, otherwise the maximum phase modifier of electric current is all disturbed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811154826.8A CN109387724B (en) | 2018-09-30 | 2018-09-30 | Fault diagnosis method for synchronous phase modulator based on longitudinal analysis and transverse correction |
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| CN201811154826.8A CN109387724B (en) | 2018-09-30 | 2018-09-30 | Fault diagnosis method for synchronous phase modulator based on longitudinal analysis and transverse correction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488136A (en) * | 2019-08-12 | 2019-11-22 | 河海大学 | The rotor one point to ground fault fault detection method of phase modifier excitation system |
| CN110617981A (en) * | 2019-09-16 | 2019-12-27 | 江苏方天电力技术有限公司 | Fault diagnosis method for phase modulator |
| CN111835018A (en) * | 2020-04-30 | 2020-10-27 | 南京理工大学 | Synchronous phase modulator starting grid-connected circuit based on time sequence hybrid excitation control and control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101507072A (en) * | 2006-08-18 | 2009-08-12 | Abb研究有限公司 | Ground fault detection |
| CN102608491A (en) * | 2010-12-22 | 2012-07-25 | 通用电气公司 | System and method for synchronous machine health monitoring |
| CN106199424A (en) * | 2016-06-29 | 2016-12-07 | 湖南工业大学 | A kind of permagnetic synchronous motor interturn short-circuit failure diagnosing method |
| CN106841899A (en) * | 2017-01-09 | 2017-06-13 | 清华大学 | The device open fault diagnostic method and device of chain static synchronization series compensator |
| CN107111284A (en) * | 2014-10-07 | 2017-08-29 | 德克萨斯仪器股份有限公司 | Failure in detecting field oriented control permagnetic synchronous motor |
| CN108089126A (en) * | 2017-12-04 | 2018-05-29 | 国网湖南省电力公司 | Phase modifier method for diagnosing faults, device and equipment |
| CN108536945A (en) * | 2018-04-02 | 2018-09-14 | 国网湖南省电力有限公司 | A kind of fault diagnosis method and system for large-scale phase modifier |
-
2018
- 2018-09-30 CN CN201811154826.8A patent/CN109387724B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101507072A (en) * | 2006-08-18 | 2009-08-12 | Abb研究有限公司 | Ground fault detection |
| CN102608491A (en) * | 2010-12-22 | 2012-07-25 | 通用电气公司 | System and method for synchronous machine health monitoring |
| CN107111284A (en) * | 2014-10-07 | 2017-08-29 | 德克萨斯仪器股份有限公司 | Failure in detecting field oriented control permagnetic synchronous motor |
| CN106199424A (en) * | 2016-06-29 | 2016-12-07 | 湖南工业大学 | A kind of permagnetic synchronous motor interturn short-circuit failure diagnosing method |
| CN106841899A (en) * | 2017-01-09 | 2017-06-13 | 清华大学 | The device open fault diagnostic method and device of chain static synchronization series compensator |
| CN108089126A (en) * | 2017-12-04 | 2018-05-29 | 国网湖南省电力公司 | Phase modifier method for diagnosing faults, device and equipment |
| CN108536945A (en) * | 2018-04-02 | 2018-09-14 | 国网湖南省电力有限公司 | A kind of fault diagnosis method and system for large-scale phase modifier |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488136A (en) * | 2019-08-12 | 2019-11-22 | 河海大学 | The rotor one point to ground fault fault detection method of phase modifier excitation system |
| CN110617981A (en) * | 2019-09-16 | 2019-12-27 | 江苏方天电力技术有限公司 | Fault diagnosis method for phase modulator |
| CN110617981B (en) * | 2019-09-16 | 2021-06-15 | 江苏方天电力技术有限公司 | Fault diagnosis method for phase modulator |
| CN111835018A (en) * | 2020-04-30 | 2020-10-27 | 南京理工大学 | Synchronous phase modulator starting grid-connected circuit based on time sequence hybrid excitation control and control method |
| CN111835018B (en) * | 2020-04-30 | 2021-09-10 | 南京理工大学 | Synchronous phase modulator starting grid-connected circuit based on time sequence hybrid excitation control and control method |
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| CN109387724B (en) | 2020-10-27 |
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Effective date of registration: 20210617 Address after: No. 200, Xiaolingwei street, Xuanwu District, Nanjing City, Jiangsu Province Patentee after: NANJING University OF SCIENCE AND TECHNOLOGY Patentee after: Nanjing wanmaoda Electronic Technology Co.,Ltd. Address before: 210094 Xuanwu District, Jiangsu, Xiaolingwei 200, Nanjing Patentee before: NANJING University OF SCIENCE AND TECHNOLOGY |
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