CN105471272A - Auxiliary converter device - Google Patents
Auxiliary converter device Download PDFInfo
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- CN105471272A CN105471272A CN201510798980.9A CN201510798980A CN105471272A CN 105471272 A CN105471272 A CN 105471272A CN 201510798980 A CN201510798980 A CN 201510798980A CN 105471272 A CN105471272 A CN 105471272A
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- earth
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- auxiliary converter
- converter device
- current value
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—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
- H02H7/12—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 for static converters or rectifiers
- H02H7/1216—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 for static converters or rectifiers for AC-AC converters
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides an auxiliary converter device. The auxiliary converter device comprises an auxiliary conversion unit connected between a three-phase AC power source and the ground, the auxiliary conversion unit is connected with an auxiliary control unit, and the auxiliary converter unit comprises multiple auxiliary converters in mutual parallel connection. The auxiliary converter device detects the value of a passing grounding current and sends the value to the auxiliary control unit for analysis and processing, when the analysis result surpasses a preset threshold, the auxiliary converters are determined to generate a grounding fault, operation of the circuit can stop, processing is carried out, the grounding fault can be accurately and rapidly determined, later processing can be conveniently carried out, operation safety and reliability of an electric locomotive can be effectively guaranteed, and market popularization and application are facilitated.
Description
Technical field
The present invention relates to the convertor assembly of rolling stock, be specifically related to a kind of auxiliary converter device.
Background technology
Along with the continuous progress of science and technology, the vehicles are also more and more convenient, a lot of city is in order to save construction cost and beautifying urban environment at present, build many subway lines, and being on the increase along with subway line, the number taking subway also gets more and more, this just proposes high requirement to the overall performance of subway, wherein, especially for the electric drive system controlling subway line, the security of operation of electric drive system and rolling stock is closely bound up.
Electric drive system due to track traffic has high voltage, big current, therefore, ensures that the normal work of drive system is the prerequisite ensureing locomotive reliability service; Electric locomotive in utilization process may aging due to cable, vibration friction etc. cause main circuit occur ground connection.Generally speaking, one point earth can't bring anything to endanger, and does not have too much influence to the normal work of system, but 2 or multipoint earthing, just may produce very large short circuit current, cause the scaling loss of the electric drive system parts of electric locomotive, machine under serious conditions, even can be caused to break.
Therefore, need now a kind of auxiliary converter device with voltage-type earthing detection technology badly, can accurately, promptly judge earth fault, to process, and then ensure the security reliability that electric locomotive runs.
Summary of the invention
The invention provides a kind of auxiliary converter device, can accurately, promptly judge earth fault, to process, and then ensure the security reliability that electric locomotive runs.
The present invention is to provide a kind of auxiliary converter device, and comprise the auxiliary converter unit be connected between three-phase alternating-current supply and the earth, described auxiliary converter unit is connected with Auxiliary Control Element; Described auxiliary converter unit comprises several AuCTs parallel with one another;
Each AuCT, carries out step-down process for the alternating current voltage exported described three-phase alternating-current supply; And when there is earth fault, circuit element is protected; Detect the earth current value flow through, and the earth current value detected is sent to Auxiliary Control Element;
Described Auxiliary Control Element, for receiving the earth current value that each AuCT sends, and analyzes described earth current value according to the level threshold value pre-set, to judge whether the AuCT this earth current value being detected earth fault occurs.
Auxiliary converter device as above, described auxiliary converter implement body comprises:
Transformer, is connected with described three-phase alternating-current supply, carries out step-down process for the alternating current voltage exported described three-phase alternating-current supply;
Earth resistance unit, is connected with the output of described transformer, for when there is earth fault, protects circuit element;
Current sensor, one end and described earth resistance unit, the other end is connected with the earth, for when there is earth fault, detecting the earth current value flowing through earth resistance unit, and the earth current value detected is sent to Auxiliary Control Element.
Auxiliary converter device as above, described Auxiliary Control Element is analyzed described earth current value according to the level threshold value pre-set, and specifically comprises:
Described earth current value and the standard ground current threshold pre-set are carried out com-parison and analysis, to judge whether the AuCT this earth current value being detected earth fault occurs; Or,
Obtain the grounding resistance of described earth resistance unit, and obtain ground voltage value according to described earth current value and described grounding resistance, described ground voltage value and the standard ground voltage threshold pre-set are carried out com-parison and analysis, to judge whether the AuCT this ground voltage value being detected earth fault occurs.
Auxiliary converter device as above, also comprises:
Power cell, is connected with vehicle dynamic control, for being alternating current by the DC inverter through vehicle dynamic control;
Filter unit, one end is connected with the output of described power cell, and the other end is connected with described transformer.
Auxiliary converter device as above, described power cell is the bridge circuit structure be made up of three IGBT module.
Auxiliary converter device as above, described filter unit comprises the filter reactor that is connected between described power cell and described transformer and is connected with described filter reactor and the filter capacitor module be in parallel with described transformer.
Auxiliary converter device as above, described filter reactor comprises the first reactor, the second reactor and the 3rd reactor that are connected with described three IGBT module respectively.
Auxiliary converter device as above, described filter capacitor module is the bridge circuit structure be made up of three electric capacity.
Auxiliary converter device as above, described in the standard ground voltage threshold that pre-sets for being less than or equal to 36V.
Auxiliary converter device as above, described earth resistance unit is formed by the first resistance be connected with described transformer and with the second resistance that described first resistance is in series, and described second resistance is connected with described current sensor.
Auxiliary converter device provided by the invention, detects the earth current value flowed through according to auxiliary converter device, and is sent to Auxiliary Control Element and carries out analyzing and processing; When analysis result is when exceeding the threshold value pre-set, then determine this AuCT generation earth fault, can the operation of halt circuit, it is processed, and then achieve and can accurately, promptly judge earth fault, to process, the effective security reliability ensureing electric locomotive operation, is conducive to the propagation and employment in market.
Accompanying drawing explanation
The structural representation of the auxiliary converter device of Fig. 1 given by the embodiment of the present invention;
The principle schematic of the auxiliary converter device of Fig. 2 given by the embodiment of the present invention.
In figure:
1, auxiliary converter unit; 2, AuCT;
3, transformer; 4, earth resistance unit;
41, the first resistance; 42, the second resistance;
5, current sensor; 6, Auxiliary Control Element;
7, vehicle dynamic control; 8, power cell;
81, IGBT module; 9, filter reactor;
91, the first reactor; 92, the second reactor;
93, the 3rd reactor; 10, filter capacitor module.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following instance for illustration of the present invention, but is not used for limiting the scope of the invention.
The structural representation of the auxiliary converter device of Fig. 1 given by the embodiment of the present invention; The principle schematic of the auxiliary converter device of Fig. 2 given by the embodiment of the present invention, known with reference to accompanying drawing 1-2, the invention provides a kind of auxiliary converter device, comprise and be connected to 1,1 between three-phase alternating-current supply and the earth and be connected with Auxiliary Control Element 6; 1 comprises several AuCTs parallel with one another 2,
Each AuCT 2, carries out step-down process for the alternating current voltage exported three-phase alternating-current supply; And when there is earth fault, circuit element is protected; Detect the earth current value flow through, and the earth current value detected is sent to Auxiliary Control Element 6;
Auxiliary Control Element 6, for receiving the earth current value that each AuCT 2 sends, and analyzes earth current value according to the level threshold value pre-set, to judge whether the AuCT this earth current value being detected earth fault occurs.
Wherein, concrete structure for AuCT 2 and Auxiliary Control Element 6 does not limit, the function that those skilled in the art can realize according to it is arranged arbitrarily, as being set to comprise reducing transformer, protective resistance and current sensing means etc. by AuCT 2, or also other structures etc. can be set to; And for Auxiliary Control Element 6, processor or treatment circuit etc. can be set to; As long as can above-mentioned functions be realized, do not repeat them here; In addition, the method that earth current value is analyzed is not limited for Auxiliary Control Element 6, those skilled in the art can be arranged according to concrete design requirement, directly carry out analysis according to earth current value as analytical method being set to judge, as earth current value and the normalized current threshold value pre-set are carried out com-parison and analysis; Or can by after processing earth current value, com-parison and analysis is carried out to the numerical value after process, as current rate, magnitude of voltage etc., as long as can judge whether the AuCT 2 this earth current value being detected earth fault occurs, and does not repeat them here.
In addition, three-phase alternating-current supply is not specifically limited, the three-phase alternating-current supply of the 380V commonly used can be selected to power; In addition, number for the 1 concrete AuCT 2 comprised does not limit, those skilled in the art can be arranged according to concrete application demand, as the number of AuCT 2 being set to 3,4,5 etc., wherein, comparatively conventional, can be set to 1 be made up of four AuCTs 2 parallel with one another, and making four AuCTs 2 be uniformly distributed in circuit, the effective like this operating state to circuit detects and monitors.
Auxiliary converter device provided by the invention, detects the earth current value flowed through according to auxiliary converter device, and is sent to Auxiliary Control Element and carries out analyzing and processing; When analysis result is when exceeding the threshold value pre-set, then determine this AuCT generation earth fault, can the operation of halt circuit, it is processed, and then achieve and can accurately, promptly judge earth fault, to process, the effective security reliability ensureing electric locomotive operation, is conducive to the propagation and employment in market.
On the basis of above-described embodiment, continue with reference to accompanying drawing 1-2 known, the concrete internal structure for AuCT 2 in the technical program does not limit, and wherein, comparatively preferably, is all set to comprise by each AuCT 2:
Transformer 3, is connected with three-phase alternating-current supply, carries out step-down process for the alternating current voltage exported three-phase alternating-current supply;
Earth resistance unit 4, is connected with the output of transformer 3, for when there is earth fault, protects circuit element;
Current sensor 5, one end and earth resistance unit 4, the other end is connected with the earth, for when there is earth fault, detecting the earth current value flowing through earth resistance unit 4, and the earth current value detected is sent to Auxiliary Control Element 6.
Wherein, the model concrete for transformer 3 and type do not limit, those skilled in the art can select dissimilar transformer 3 according to concrete circuit design, and the degree and scope of being carried out step-down process by transformer 3 is not limited, those skilled in the art can the normal working voltage required for side circuit be arranged, wherein, in order to ensure that in circuit, a components and parts is in normal operating state, comparatively preferred, being arranged on by voltage after transformer 3 processes is less than or equal in the scope of 36V, within the scope of this, effectively can ensure that the device in circuit can work normally, therefore, also can using the above-mentioned voltage range making circuit devcie normally work as the standard ground voltage threshold scope pre-set, if the operating voltage in circuit exceeds this standard ground voltage threshold scope, then can illustrate that circuit is in abnormal operating state, need to check the measures such as row relax of going forward side by side in time, and then effectively ensure that the reliability that circuit normally works.
In addition, the concrete internal structure of earth resistance unit 4 and its concrete resistance value are not limited, those skilled in the art can adopt different structure and the earth resistance unit 4 of different resistance values according to different circuit, comprise as earth resistance unit 4 being set to several resistant series the structure that forms, also the structure be made up of several resistor coupled in parallel can be set to, or the bridge architecture to be made up of several resistance etc., wherein, in order to ensure the degree that earth resistance unit 4 pairs of circuit elements are protected, comparatively preferred, earth resistance unit 4 is set to form by the first resistance 41 be connected with transformer 3 and with the second resistance 42 that the first resistance 41 is in series, wherein, second resistance 42 is connected with current sensor 5, adopt the structure of series connection that current sensor 5 can be made to detect the earth current value flowing through earth resistance unit 4 more accurately, be conducive to more accurately analyzing earth fault and judging.
On the basis of above-described embodiment, continue with reference to accompanying drawing 1-2 known, in the technical program, the analytical method of Auxiliary Control Element 6 is not limited, wherein, comparatively preferred, Auxiliary Control Element 6 is analyzed earth current value according to the level threshold value pre-set, is set to specifically comprise:
Earth current value and the standard ground current threshold pre-set are carried out com-parison and analysis, to judge whether the AuCT 2 this earth current value being detected earth fault occurs; Or,
Obtain the grounding resistance of earth resistance unit 4, and obtain ground voltage value according to earth current value and grounding resistance, ground voltage value and the standard ground voltage threshold pre-set are carried out com-parison and analysis, to judge whether the AuCT 2 this ground voltage value being detected earth fault occurs.
Wherein, concrete structure for Auxiliary Control Element 6 does not limit, as Auxiliary Control Element 6 being set to be made up of an independent central processing unit, or Auxiliary Control Element 6 is set to be made up of etc. several governor circuits, those skilled in the art can be arranged arbitrarily it according to the function of its specific implementation, as long as can achieve a butt joint, earth-current value or ground voltage value carry out analysis judgement, and then judge the concrete AuCT 2 broken down, do not repeat them here.
Auxiliary converter device provided by the invention, the earth current value flowing through earth resistance is detected according to current sensor 5, and then the potential difference between the tie point that can obtain between earth resistance and transformer 3 and the earth, and there is proportionate relationship between earth current value and potential difference, when potential difference is larger, earth current value is larger; When potential difference more hour, earth current value is less; When detecting that earth current value or ground voltage value exceed safe range, then determine that earth fault occurs this AuCT 2, can the operation of halt circuit, it is processed, and then achieve and can accurately, promptly judge earth fault, to process, the effective security reliability ensureing electric locomotive operation, is conducive to the propagation and employment in market.
On the basis of above-described embodiment, continue with reference to accompanying drawing 1-2 known, in order to the specific works process of this auxiliary converter of understanding device clearly, this auxiliary converter device be set to also comprise:
Power cell 8, is connected with vehicle dynamic control 7, for being alternating current by the DC inverter through vehicle dynamic control 7;
Filter unit, one end is connected with the output of power cell 8, and the other end is connected with transformer 3.
Wherein, for vehicle dynamic control 7, its function mainly realized is determine the driving condition of vehicle, generally, vehicle dynamic control 7 can be set to comprise the wheel speed sensor be arranged on wheel, be used for following the tracks of the motion state of each wheel; Be arranged at the steering wheel angle sensor on vehicle steering, be used for the corner of sensing direction dish; Yaw-rate sensor, is used for recording all motions of automobile around vertical axis thereof; Lateral acceleration sensor, the size of centrifugal force when being used for detecting Turning travel; Wheel displacements transducer, is used for measuring the change of wheel and vehicle body relative position; Certain, those skilled in the art can also need the function setting realized to comprise other devices according to it; And the connected mode of the said structure of vehicle dynamic control 7 and internal structure are not limited, the function that those skilled in the art can realize according to it and concrete design requirement are arranged arbitrarily, do not repeat them here.
In addition, concrete internal structure for power cell 8 and filter unit does not limit, the function that those skilled in the art can realize according to it is arranged, as power cell 8 being set to inverter or inverter circuit, and concrete inverter or inverter circuit can select usual means of the prior art; And power cell 8 and filter unit for filter unit, filter unit can be set to filter circuit comprising electric capacity and/reactance etc., as long as can be made to realize above-mentioned effect; Wherein, in order to coordinate the normal working voltage in circuit, and can ensure above-mentioned power cell 8 and filter unit realize effect, comparatively preferably, power cell 8 is set to the bridge circuit structure be made up of three IGBT module 81; Be set to filter unit to comprise the filter reactor 9 that is connected between power cell 8 and transformer 3 and be connected with filter reactor 9 and the filter capacitor module 10 be in parallel with transformer 3.
IGBT module 81 of the prior art is adopted for the IGBT module 81 in above-mentioned formation power cell 8, and the concrete structure of the filter reactor 9 in power cell 8 is not limited, those skilled in the art can be arranged arbitrarily according to the design requirement of circuit, wherein, because DC inverter is three-phase alternating current by power cell 8, therefore, the conveniently processing procedure of circuit, filter reactor 9 is set to comprise the first reactor 91 be connected with three IGBT module 81 respectively, second reactor 92 and the 3rd reactor 93, wherein, first reactor 91, second reactor 92 and the 3rd reactor 93 are connected with the three-phase alternating current after inversion, and then effectively ensure that overall filtering is carried out to three-phase alternating current, remove the burr in the signal of telecommunication, make obtain earth current value or ground voltage value can be more reliable and more stable.
In addition, concrete structure for the filter capacitor module 10 in above-mentioned filter unit does not limit, filter capacitor module 10 can be set to comprise several capacitances in series or the circuit structure formed in parallel, wherein, in order to better carry out filtering process to three-phase alternating current, filter capacitor module 10 is set to the bridge circuit structure be made up of three electric capacity, effectively filtering process can be carried out to three-phase alternating current like this by filter reactor 9 and filter capacitor module 10, ensure that the quality of the three-phase alternating current signal of telecommunication being input to transformer 3, and then the accuracy and the reliability that obtain earth current value or ground voltage value can be ensured.
During embody rule, the technical program is mainly by earth resistance unit 4 and current sensor 5 acting in conjunction, promptly and accurately earth current value can be detected, when there being multiple stage AuCT 2 to carry out work, can accurately differentiate is that AuCT 2 breaks down, to process, wherein, AuCT 2 for detection of ground faults in the technical program can be adopted in two ways, and a kind of is carry out analysis to the earth current value flowing through earth resistance unit 4 to judge; Another kind carries out analysis to the ground voltage value of earth resistance unit 4 to judge, concrete process is as follows:
Adopt the operating process that earth current value is analyzed:
This auxiliary converter device is set to be connected with three-phase alternating-current supply by four AuCTs 2, when wherein there is earth fault in a certain AuCT 2, using between earth resistance unit 4 and transformer 3 as potential point N, meeting appearance potential between corresponding N and the earth is poor, and then make earth resistance unit 4 just to have earth current and flow through, the earth current value flowing through earth resistance unit 4 can be detected by the current sensor 5 arranged, current sensor 5 by the earth current value transmit that detects to Auxiliary Control Element 6, Auxiliary Control Element 6 pairs of earth current values carry out analyzing and processing, when analysis result is when detecting that earth current value exceedes standard ground current threshold (i.e. the safe range) that pre-set, then think that earth fault occurs this AuCT 2 corresponding to earth current value, the AuCT 2 in circuit is now made to quit work, carry out relevant treatment, to get rid of earth fault, after eliminating earth fault, AuCT 2 can be made to work on, when analysis result be the earth current value detected do not exceed the standard ground current threshold pre-set time, then illustrate that this AuCT corresponding to earth current value 2 is normal operating conditions.
Adopt the operating process that ground voltage value is analyzed:
On the basis of aforesaid operations process, Auxiliary Control Element 6 obtains the resistance value of earth resistance unit 4 further, and then pass through earth current value and the resistance value of acquisition, ground voltage value can be obtained, and this ground voltage value is less than or equal to 36V (i.e. safe range) with the standard ground voltage threshold pre-set by Auxiliary Control Element 6 carries out com-parison and analysis, when analysis result is that ground voltage value exceeds the safe range value pre-set, then think that earth fault occurs the AuCT 2 corresponding to this ground voltage value, the AuCT 2 in circuit is now made to quit work, carry out relevant treatment, to get rid of earth fault, after eliminating earth fault, AuCT 2 can be made to work on, when analysis result be ground voltage value within the safe range value pre-set, then think that AuCT corresponding to this ground voltage value 2 is for normal operating conditions.
In addition, also will multiple potential point can be set in circuit, detect the magnitude of voltage between multiple potential point, through analyzing the magnitude of voltage between multiple potential point, can judge the particular location of earth fault and the degree of earth fault more accurately, concrete implementation process does not repeat them here.
Auxiliary converter device provided by the invention, the earth current value flowing through earth resistance is detected according to current sensor 5, and then the potential difference between the N point that can obtain between earth resistance and transformer 3 and the earth, and there is proportionate relationship between earth current value and potential difference, when potential difference is larger, earth current value is larger; When potential difference more hour, earth current value is less; When detecting that earth current value or ground voltage value exceed safe range, then determine that earth fault occurs this AuCT 2, can the operation of halt circuit, it is processed, and then achieve and can accurately, promptly judge earth fault, to process, the effective security reliability ensureing electric locomotive operation, is conducive to the propagation and employment in market.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. an auxiliary converter device, is characterized in that, comprise the auxiliary converter unit be connected between three-phase alternating-current supply and the earth, described auxiliary converter unit is connected with Auxiliary Control Element; Described auxiliary converter unit comprises several AuCTs parallel with one another;
Each AuCT, carries out step-down process for the alternating current voltage exported described three-phase alternating-current supply; And when there is earth fault, circuit element is protected; Detect the earth current value flow through, and the earth current value detected is sent to Auxiliary Control Element;
Described Auxiliary Control Element, for receiving the earth current value that each AuCT sends, and analyzes described earth current value according to the level threshold value pre-set, to judge whether the AuCT this earth current value being detected earth fault occurs.
2. auxiliary converter device according to claim 1, is characterized in that, described auxiliary converter implement body comprises:
Transformer, is connected with described three-phase alternating-current supply, carries out step-down process for the alternating current voltage exported described three-phase alternating-current supply;
Earth resistance unit, is connected with the output of described transformer, for when there is earth fault, protects circuit element;
Current sensor, one end and described earth resistance unit, the other end is connected with the earth, for when there is earth fault, detecting the earth current value flowing through earth resistance unit, and the earth current value detected is sent to Auxiliary Control Element.
3. auxiliary converter device according to claim 2, is characterized in that, described Auxiliary Control Element is analyzed described earth current value according to the level threshold value pre-set, and specifically comprises:
Described earth current value and the standard ground current threshold pre-set are carried out com-parison and analysis, to judge whether the AuCT this earth current value being detected earth fault occurs; Or,
Obtain the grounding resistance of described earth resistance unit, and obtain ground voltage value according to described earth current value and described grounding resistance, described ground voltage value and the standard ground voltage threshold pre-set are carried out com-parison and analysis, to judge whether the AuCT this ground voltage value being detected earth fault occurs.
4. auxiliary converter device according to claim 2, is characterized in that, also comprise:
Power cell, is connected with vehicle dynamic control, for being alternating current by the DC inverter through vehicle dynamic control;
Filter unit, one end is connected with the output of described power cell, and the other end is connected with described transformer.
5. auxiliary converter device according to claim 4, is characterized in that, described power cell is the bridge circuit structure be made up of three IGBT module.
6. auxiliary converter device according to claim 4, it is characterized in that, described filter unit comprises the filter reactor that is connected between described power cell and described transformer and is connected with described filter reactor and the filter capacitor module be in parallel with described transformer.
7. auxiliary converter device according to claim 5, is characterized in that, described filter reactor comprises the first reactor, the second reactor and the 3rd reactor that are connected with described three IGBT module respectively.
8. auxiliary converter device according to claim 6, is characterized in that, described filter capacitor module is the bridge circuit structure be made up of three electric capacity.
9. auxiliary converter device according to claim 3, is characterized in that, described in the standard ground voltage threshold that pre-sets for being less than or equal to 36V.
10. according to the auxiliary converter device in claim 2-8 described in any one, it is characterized in that, described earth resistance unit is formed by the first resistance be connected with described transformer and with the second resistance that described first resistance is in series, and described second resistance is connected with described current sensor.
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| CN201510798980.9A CN105471272A (en) | 2015-11-18 | 2015-11-18 | Auxiliary converter device |
| PCT/CN2015/097499 WO2017084137A1 (en) | 2015-11-18 | 2015-12-15 | Auxiliary converter device |
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| CN201510798980.9A CN105471272A (en) | 2015-11-18 | 2015-11-18 | Auxiliary converter device |
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| CN105471272A true CN105471272A (en) | 2016-04-06 |
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| CN201510798980.9A Pending CN105471272A (en) | 2015-11-18 | 2015-11-18 | Auxiliary converter device |
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| WO (1) | WO2017084137A1 (en) |
Cited By (3)
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| CN109782129A (en) * | 2019-01-24 | 2019-05-21 | 中国铁道科学研究院集团有限公司 | The ground fault independent positioning method and device of rail traffic traction AuCT |
| WO2019113918A1 (en) * | 2017-12-11 | 2019-06-20 | 中车永济电机有限公司 | Auxiliary convertor circuit, auxiliary convertor and auxiliary convertor cabinet |
| CN110488135A (en) * | 2019-07-25 | 2019-11-22 | 中车永济电机有限公司 | A kind of high-power permanent magnet directly drives locomotive converter ground fault judgment method and positioning strategy |
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| CN101277072A (en) * | 2007-03-28 | 2008-10-01 | 株式会社日立制作所 | Electric power transformation device and method |
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| EP0707367A1 (en) * | 1994-10-11 | 1996-04-17 | Kabushiki Kaisha Toshiba | Ground fault detecting apparatus and method for detecting ground fault of field circuit and exciting circuit by detecting ground fault current flowing from ground to neutral point of exciting circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019113918A1 (en) * | 2017-12-11 | 2019-06-20 | 中车永济电机有限公司 | Auxiliary convertor circuit, auxiliary convertor and auxiliary convertor cabinet |
| CN109782129A (en) * | 2019-01-24 | 2019-05-21 | 中国铁道科学研究院集团有限公司 | The ground fault independent positioning method and device of rail traffic traction AuCT |
| CN109782129B (en) * | 2019-01-24 | 2024-05-10 | 中国铁道科学研究院集团有限公司 | Ground fault point positioning method and device for rail transit traction auxiliary converter |
| CN110488135A (en) * | 2019-07-25 | 2019-11-22 | 中车永济电机有限公司 | A kind of high-power permanent magnet directly drives locomotive converter ground fault judgment method and positioning strategy |
| CN110488135B (en) * | 2019-07-25 | 2021-06-22 | 中车永济电机有限公司 | Grounding fault judgment method and positioning strategy for high-power permanent magnet direct-drive locomotive converter |
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| WO2017084137A1 (en) | 2017-05-26 |
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