CN106080207A - Hand over orthogonal circuit ground guard method and diesel generating set, locomotive - Google Patents

Hand over orthogonal circuit ground guard method and diesel generating set, locomotive Download PDF

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Publication number
CN106080207A
CN106080207A CN201610529982.2A CN201610529982A CN106080207A CN 106080207 A CN106080207 A CN 106080207A CN 201610529982 A CN201610529982 A CN 201610529982A CN 106080207 A CN106080207 A CN 106080207A
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China
Prior art keywords
phase
voltage
output
amplitude
threshold
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CN201610529982.2A
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CN106080207B (en
Inventor
蔡志伟
杨曦亮
肖桦
陆璐
李哲
李斌
杜欣
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CRRC Dalian Co Ltd
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CNR Dalian Locomotive and Rolling Stock Co Ltd
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Priority to CN201610529982.2A priority Critical patent/CN106080207B/en
Priority to PCT/CN2016/104651 priority patent/WO2018006516A1/en
Publication of CN106080207A publication Critical patent/CN106080207A/en
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Publication of CN106080207B publication Critical patent/CN106080207B/en
Priority to ZA2018/04062A priority patent/ZA201804062B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • 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
    • H02H7/10—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 converters; for rectifiers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Inverter Devices (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The friendship orthogonal circuit ground guard method of the present invention, sets current threshold Δ I, threshold voltage Δ U1、ΔU2、ΔU3, when the amplitude of vector I is higher than current threshold Δ I, if a phase voltage amplitude of output inverter output is less than threshold voltage Δ U1And other biphase voltage phase difference is when being 60 °, then judges that this phase has one point earth, cut off the connection of output inverter and main circuit intermediate DC link；If phase voltage amplitude U of output inverter output1、U2、U3All higher than threshold voltage Δ U2, and voltage-to-ground is all negative or positive, then judge plus or minus bus P or the N ground connection of intermediate DC link, disconnects contactless contactor BKR, eliminating rectifier and the connection of alternating current power supply；If inverter output has two phase voltages all higher than threshold voltage Δ U3, then the exchange other phase ground connection of input side, switching off AC power are judged.Cost can be reduced, it is achieved rapid grounding diagnosis and location, pinpoint the problems in advance, effectively protect equipment.

Description

Hand over orthogonal circuit ground guard method and diesel generating set, locomotive
Technical field
The present invention relates to a kind of friendship orthogonal circuit ground guard method and diesel generating set, locomotive, belong to locomotive technology Field.
Background technology
The feature handing over orthogonal electric driving vehicle main circuit is high voltage, big electric current.During using, main circuit may be by , vibration friction etc. aging in cable and there is ground connection.Earth fault likely affects the normal work of main circuit, even produces very Big short circuit current, makes locomotive transmission system parts scaling loss, results even in accident of locomotive defect time serious.Therefore, in time, accurately, Promptly earth point judged and position extremely important.
Prior art is that the ground detection device handing over orthogonal circuit provides many technical schemes, is roughly divided into active inspection Survey and passive detection two ways.But the general volume ratio of active ground detection device of prior art is relatively big, structure is the most multiple Miscellaneous, maintenance cost is high.Not only its relay contact can produce misoperation and reports to the police because of the vibration of locomotive operation, and its direct current control Loop processed ground connection is also possible to produce electromagnetic interference to other control circuits of locomotive.And passive earthing detection of the prior art dress Need not external input signal although putting, only being come by the change of AC circuit and main circuit positive and negative busbar voltage-to-ground waveform Judge whether earth fault, improve anti-interference, but but there is protection " dead band ", and must be in a high voltage state Earth fault could be detected.
For overcoming disadvantages mentioned above, No. 201210405663.2 Chinese patent application " locomotive traction and aid system integrations Earth protective device " give a different scheme: at least two series resistance is connected on positive pole and the negative pole of DC link Between, voltage sensor and the resistor coupled in parallel of one one termination negative or positive electrode, the other end ground connection of this resistance, should by detection Ohmically voltage judges earth point.But in this scenario, decision is assisted by the quantity of series resistance and the selection of resistance Load the insulation against ground voltage of especially auxiliary motor, if series resistance breaks down, it will have a strong impact on assistant load Running voltage, reduces the reliability of locomotive operation.
Summary of the invention
The purpose of the present invention overcomes the deficiency of above-mentioned prior art exactly, it is provided that a kind of simple in construction, safe and reliable, quick The friendship orthogonal circuit ground guard method of Accurate Diagnosis location and diesel generating set, locomotive.
The object of the present invention is achieved like this: a kind of hands over orthogonal circuit ground guard method, it is characterised in that take as Lower step:
A. current threshold Δ I, threshold voltage Δ U are set1、ΔU2、ΔU3；
B. the phase current I of exchange input side is gathereda、Ib、IcAnd phase voltage U of output inverter outputa1、Ub1、Uc1；
C. phase current I is calculateda、Ib、IcVector I, output inverter output phase voltage amplitude U1、U2、U3And voltage Phase difference θab、Δθbc、Δθca；
D. when the amplitude of vector I is less than current threshold Δ I, if phase voltage amplitude U of output inverter output1、U2、 U3Both greater than threshold voltage Δ U1And voltage phase difference Δ θab、Δθbc、ΔθcaBe all 120 °, then circuit exchange input side, in Between DC link and exchange outlet side the most no ground；
E. when the amplitude of vector I is higher than current threshold Δ I, if the A phase voltage amplitude of output inverter output is less than Threshold voltage Δ U1And voltage phase difference Δ θbcWhen being 60 °, then judge that A phase has one point earth, cuts off output inverter and main electricity The connection of road intermediate DC link；The B phase voltage amplitude of output is less than threshold voltage Δ U1And phase difference θ of C, A phase voltageca When being 60 °, then judge that B phase has one point earth, cuts off the connection of output inverter and main circuit intermediate DC link；The C of output Phase voltage amplitude is less than threshold voltage Δ U1And phase difference θ of A, B phase voltageabWhen being 60 °, then judge that C phase has one point earth, Cut off the connection of output inverter and main circuit intermediate DC link；
F. when the amplitude of vector I is higher than current threshold Δ I, if phase voltage amplitude U of output inverter output1、U2、 U3All higher than threshold voltage Δ U2, and voltage-to-ground is all negative, then judge the positive bus-bar P ground connection of intermediate DC link, disconnects Contactless contactor BKR, eliminating rectifier and the connection of alternating current power supply；
G. when the amplitude of vector I is higher than current threshold Δ I, if A, B, C phase voltage of output inverter output is whole Higher than threshold voltage Δ U2, and voltage-to-ground is just all, then judge the negative busbar N ground connection of intermediate DC link, disconnects catalyst Switch BKR, eliminating rectifier and the connection of alternating current power supply；
H. when the amplitude of vector I is higher than current threshold Δ I, if B, C phase voltage of inverter output is all higher than electricity Pressure valve value Δ U3, then exchange input side A phase ground connection, switching off AC power are judged；If A, C phase voltage of inverter output is the highest In threshold voltage Δ U3, then exchange input side B phase ground connection, switching off AC power are judged；If A, B phase voltage of inverter output is complete Portion is higher than threshold voltage Δ U3, then exchange input side C phase ground connection, switching off AC power are judged.
A kind of diesel generating set, it is characterised in that use above-mentioned friendship orthogonal circuit ground detection method.
A kind of railway locomotive, it is characterised in that use above-mentioned friendship orthogonal circuit ground detection method.
Technical scheme detects device without Special grounding, utilizes main circuit input side rectifier Current Mutual Inductance Locomotive can be handed over orthogonal main circuit grounding to be oriented detection by device, output inverter outlet side voltage transformer.Inspection can be saved Measurement equipment, reduce maintenance workload, reduce cost, it is achieved quick diagnosis during main circuit grounding and location, improve locomotive can By property, pinpoint the problems in advance, prevent problem from expanding, effectively protect equipment.
Accompanying drawing explanation
Fig. 1 is the friendship orthogonal diesel-electric locomotive main circuit principle schematic of the embodiment of the present invention.
Fig. 2 is the program flow diagram handing over orthogonal circuit ground guard method of the embodiment of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
The friendship orthogonal diesel-electric locomotive main circuit principle schematic of the embodiment of the present invention is as shown in Figure 1.Make electricity consumption Road simulation software MATLAB is set up and is handed over orthogonal diesel-electric locomotive main circuit model, is separately operable various one-point grounding fault shape Condition: under all ground connection situations, the amplitude of the three-phase current vector of electromotor output is IJD, it is contemplated that detection sensor essence Degree and capacity of resisting disturbance, determine current threshold Δ I≤IJD；When output inverter outlet side has a phase ground connection, the phase of Earth Phase Voltage magnitude is USCJD, it is contemplated that detection sensor accuracy and capacity of resisting disturbance, determine threshold voltage Δ U1≥USCJD；In Between the positive bus-bar of DC link or during negative busbar ground connection, the three-phase voltage amplitude of output inverter outlet side is UZLJD, it is considered to To detection sensor accuracy and capacity of resisting disturbance, determine threshold voltage Δ U2≤UZJD；One is had to connect at commutator exchange input side During ground, B, C phase voltage of output inverter output or C, A phase voltage or A, B phase voltage are equal to USRJD, it is contemplated that detection sensing Device precision and capacity of resisting disturbance, determine threshold voltage Δ U3≤USRJD。
Friendship orthogonal circuit ground detection method program flow diagram referring to the embodiment of the present invention shown in accompanying drawing 2.Program is entered Enter frame 2.1 and start detection.Enter frame 2.2 and gather input side rectifier three-phase current Ia、Ib、Ic.Enter frame 2.3 collection output inverse Become the three-phase voltage U of device 1 outputa1、Ub1、Uc1.Enter frame 2.4 and calculate three-phase current Ia、Ib、IcVector I.Enter frame 2.5 Calculate three-phase voltage Ua1、Ub1、Uc1Amplitude U1、U2、U3.Enter frame 2.6 and calculate Ua1And Ub1Phase difference θab.Enter frame 2.7 Calculate Ub1And Uc1Phase difference θbc.Enter frame 2.8 and calculate Uc1And Ua1Phase difference θca.Enter frame 2.9 and judge vector I Amplitude whether less than current threshold Δ I.If frame 2.9 condition meets, enter frame 2.19 and judge U1、U2、U3Whether more than voltage valve Value Δ U1And phase difference θab、Δθbc、ΔθcaIt is all 120 °.If frame 2.19 condition meets, then judge that Main Circuit of Diesel Locomotive is equal No ground, it is then back to mastery routine；If frame 2.19 condition is unsatisfactory for, return mastery routine.If frame 2.9 condition is unsatisfactory for, enter frame 2.10 judge U1Whether less than threshold voltage Δ U1And Ub1And Uc1Phase difference θbcIt it is 60 °.If frame 2.10 condition meets, then enter Enter frame 2.21, it is determined that main circuit inverter outlet side A phase has one point earth, disconnect contactless contactor BKI, cut off output inverter With the connection of main circuit intermediate DC link, it is then back to mastery routine；If frame 2.10 condition is unsatisfactory for, enters frame 2.11 and judge U2 Whether less than threshold voltage Δ U1And Uc1And Ua1Phase difference θcaIt it is 60 °.If frame 2.11 condition meets, then enter frame 2.22, Judge that main circuit inverter outlet side B phase has one point earth, disconnect contactless contactor BKI, cut off output inverter and main circuit The connection of intermediate DC link, is then back to mastery routine；If frame 2.11 condition is unsatisfactory for, enters frame 2.12 and judge U3Whether it is less than Threshold voltage Δ U1And Ua1And Ub1Phase difference θabIt it is 60 °.If frame 2.12 condition meets, then enter frame 2.23, it is determined that main electricity Road inverter outlet side C phase has one point earth, disconnects contactless contactor BKI, cut off output inverter and main circuit intermediate dc The connection of link, is then back to mastery routine；If frame 2.12 condition is unsatisfactory for, enters frame 2.13 and judge U1、U2、U3Whether more than Δ U2And it is all negative value.If frame 2.13 condition meets, then enter frame 2.24, it is determined that the positive bus-bar P ground connection of main circuit DC link, disconnected Open contactless contactor BKR, eliminating rectifier and the connection of main generator G, it is then back to mastery routine；If frame 2.13 condition is discontented with Foot, enters frame 2.14 and judges U1、U2、U3Whether more than Δ U2And be all on the occasion of.If frame 2.14 condition meets, then enter frame 2.25, Judge the negative busbar N ground connection of main circuit DC link, disconnect contactless contactor BKR, eliminating rectifier and the company of main generator G Connect, be then back to mastery routine；If frame 2.14 condition is unsatisfactory for, return mastery routine.Enter frame 2.15 and judge B, C that inverter exports Whether phase voltage is all higher than threshold voltage Δ U3If frame 2.15 condition meets, then enter frame 2.26, it is determined that exchange input side A Phase ground connection, diesel generating set is shut down, is then back to mastery routine；If frame 2.15 condition is unsatisfactory for, then enter frame 2.16.At frame 2.16, it is judged that whether A, C phase voltage of inverter output is all higher than threshold voltage Δ U3If frame 2.16 condition meets, then enter Entering frame 2.27, it is determined that exchange input side B phase ground connection, diesel generating set is shut down, is then returned and add mastery routine；If frame 2.16 condition is not Meet, then enter frame 2.17.At frame 2.17, it is judged that whether A, B phase voltage of inverter output is all higher than threshold voltage Δ U3, If frame 2.17 condition meets, then entering frame 2.28, it is determined that exchange input side C phase ground connection, diesel generating set is shut down, is then back to Mastery routine；If frame 2.17 condition is unsatisfactory for, then return mastery routine.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent； And these amendment or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (3)

1. hand over orthogonal circuit ground guard method for one kind, it is characterised in that take following steps:
A. current threshold Δ I, threshold voltage Δ U are set1、ΔU2、ΔU3；
B. the phase current I of exchange input side is gathereda、Ib、IcAnd phase voltage U of output inverter outputa1、Ub1、Uc1；
C. phase current I is calculateda、Ib、IcVector I, output inverter output phase voltage amplitude U1、U2、U3And voltage-phase Difference Δ θab、Δθbc、Δθca；
D. when the amplitude of vector I is less than current threshold Δ I, if phase voltage amplitude U of output inverter output1、U2、U3All More than threshold voltage Δ U1And voltage phase difference Δ θab、Δθbc、ΔθcaIt is all 120 °, then the exchange input side of circuit, middle straight Stream link and exchange outlet side are the most no ground；
E. when the amplitude of vector I is higher than current threshold Δ I, if the A phase voltage amplitude of output inverter output is less than voltage Threshold values Δ U1And voltage phase difference Δ θbcWhen being 60 °, then judge that A phase has one point earth, cuts off in output inverter and main circuit Between the connection of DC link；The B phase voltage amplitude of output is less than threshold voltage Δ U1And phase difference θ of C, A phase voltagecaFor When 60 °, then judge that B phase has one point earth, cuts off the connection of output inverter and main circuit intermediate DC link；The C phase of output Voltage magnitude is less than threshold voltage Δ U1And phase difference θ of A, B phase voltageabWhen being 60 °, then judge that C phase has one point earth, cuts Disconnected output inverter and the connection of main circuit intermediate DC link；
F. when the amplitude of vector I is higher than current threshold Δ I, if phase voltage amplitude U of output inverter output1、U2、U3Entirely Portion is higher than threshold voltage Δ U2, and voltage-to-ground is all negative, then judge the positive bus-bar P ground connection of intermediate DC link, disconnects contact Device switch BKR, eliminating rectifier and the connection of alternating current power supply；
G. when vector I amplitude higher than current threshold Δ I time, if output inverter output A, B, C phase voltage all higher than Threshold voltage Δ U2, and voltage-to-ground is just all, then judge the negative busbar N ground connection of intermediate DC link, disconnects contactless contactor BKR, eliminating rectifier and the connection of alternating current power supply；
H. when the amplitude of vector I is higher than current threshold Δ I, if B, C phase voltage of inverter output is all higher than voltage valve Value Δ U3, then exchange input side A phase ground connection, switching off AC power are judged；If A, C phase voltage of inverter output is all higher than electricity Pressure valve value Δ U3, then exchange input side B phase ground connection, switching off AC power are judged；If A, B phase voltage of inverter output is the highest In threshold voltage Δ U3, then exchange input side C phase ground connection, switching off AC power are judged.
2. a diesel generating set, it is characterised in that use and hand over orthogonal circuit ground detection method described in claim 1.
3. a railway locomotive, it is characterised in that use and hand over orthogonal circuit ground detection method described in claim 1.
CN201610529982.2A 2016-07-07 2016-07-07 Hand over the guard method of orthogonal circuit ground and diesel generating set, locomotive Active CN106080207B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201610529982.2A CN106080207B (en) 2016-07-07 2016-07-07 Hand over the guard method of orthogonal circuit ground and diesel generating set, locomotive
PCT/CN2016/104651 WO2018006516A1 (en) 2016-07-07 2016-11-04 Ac-dc-ac circuit grounding protection method, diesel generator set and locomotive
ZA2018/04062A ZA201804062B (en) 2016-07-07 2018-06-18 Ac-dc-ac circuit grounding protection method, diesel generator set and locomotive

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CN201610529982.2A CN106080207B (en) 2016-07-07 2016-07-07 Hand over the guard method of orthogonal circuit ground and diesel generating set, locomotive

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110350483A (en) * 2018-04-04 2019-10-18 台达电子工业股份有限公司 Power converter plant and fault detection method with Earth Fault Detection function

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109532571B (en) * 2019-01-09 2023-05-02 西南交通大学 Three-phase power supply control system of electrified railway train

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1411116A (en) * 2002-11-29 2003-04-16 清华大学 Generator stator single phase grounding protection method
JP2011217481A (en) * 2010-03-31 2011-10-27 Daihen Corp Ground fault direction detecting device
CN204347481U (en) * 2015-01-20 2015-05-20 北京东风机车电器厂 A kind of articulated truck alternating current drive system electric control device
CN104764978A (en) * 2015-03-26 2015-07-08 河海大学 Single-phase earth fault phase selection and transition resistance measurement method
CN104811025A (en) * 2015-05-06 2015-07-29 永济新时速电机电器有限责任公司 Auxiliary converter with multiple protections

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11164421A (en) * 1997-11-27 1999-06-18 Mitsubishi Electric Corp Ac-dc converter equipment
CN1250978C (en) * 2004-09-24 2006-04-12 北京交通大学 Passive earth detecting method and device for main circuit of ac-dc electric locomotive
US7643260B2 (en) * 2005-10-11 2010-01-05 Arris Group, Inc. System for EMI filter surge voltage clamping
US8159802B2 (en) * 2008-11-17 2012-04-17 Lockheed Martin Corporation 3-phase power factor corrected AC to DC filtered switching power supply
CN102466770A (en) * 2010-11-11 2012-05-23 株洲南车时代电气股份有限公司 Method and system for judging ground fault point of AC-DC-AC (Alternating Current-Direct Current-Alternating Current) electric locomotive
CN103770650B (en) * 2012-10-22 2016-08-31 中车大同电力机车有限公司 Locomotive traction and aid system Integral grounding protection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1411116A (en) * 2002-11-29 2003-04-16 清华大学 Generator stator single phase grounding protection method
JP2011217481A (en) * 2010-03-31 2011-10-27 Daihen Corp Ground fault direction detecting device
CN204347481U (en) * 2015-01-20 2015-05-20 北京东风机车电器厂 A kind of articulated truck alternating current drive system electric control device
CN104764978A (en) * 2015-03-26 2015-07-08 河海大学 Single-phase earth fault phase selection and transition resistance measurement method
CN104811025A (en) * 2015-05-06 2015-07-29 永济新时速电机电器有限责任公司 Auxiliary converter with multiple protections

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110350483A (en) * 2018-04-04 2019-10-18 台达电子工业股份有限公司 Power converter plant and fault detection method with Earth Fault Detection function
CN110350483B (en) * 2018-04-04 2022-03-08 台达电子工业股份有限公司 Power converter device with ground fault detection function and fault detection method
US11502507B2 (en) 2018-04-04 2022-11-15 Delta Electronics, Inc. Power converter with ground fault detection function and fault detection method

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WO2018006516A1 (en) 2018-01-11
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