CN103166222A - Filtering system - Google Patents
Filtering system Download PDFInfo
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- CN103166222A CN103166222A CN2011104125430A CN201110412543A CN103166222A CN 103166222 A CN103166222 A CN 103166222A CN 2011104125430 A CN2011104125430 A CN 2011104125430A CN 201110412543 A CN201110412543 A CN 201110412543A CN 103166222 A CN103166222 A CN 103166222A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention provides a filtering system. The filtering system comprises a first filtering return circuit, a second filtering return circuit, a commutation circuit, a first collection unit, a second collection unit, and a judgment control unit. The first filtering return circuit is connected between a first inverter and a first load, the second filtering return circuit is connected between a second inverter and a second load, the first collection unit and the second collection unit are respectively used for collecting current signals and voltage signals in the first filtering return circuit and the second filtering return circuit, and respectively transmitting the collected current signals and the voltage signals to the judgment control unit, and the judgment control unit is used for controlling the commutation circuit to commutate according to the received current signals and the voltage signals. Through the filtering system, when one filtering return circuit breaks down, the other filtering return circuit can continue to supply electricity for the load on the failure filtering return circuit, normal working of the load can not be affected, and therefore normal working of a whole locomotive circuit system can be guaranteed.
Description
Technical field
The present invention relates to Electrical Control Technology, relate in particular to the filtering system that a kind of electric locomotive power supply system is used.
Background technology
In electric locomotive, usually by subordinate inverter, Electric Locomotive Auxiliary System is powered, subordinate inverter can be converted to DC power supply pulse width modulation (Pulse Width Modulation, be called for short PWM) ripple, the PWM ripple more after filtration wave circuit be treated as quasi-sine-wave.
Filter circuit of the prior art only has independently filter circuit of or two usually.This filter circuit is in when work, and the filter circuit of a filter circuit can only be a load supplying, or by two independently filter circuit be respectively different load supplyings.The defective of this filter circuit of the prior art is, when the filter circuit that is a load supplying breaks down, just must cut off this filter circuit, to this load can't be worked, thereby causes the electric power system of locomotive can't normal power supply.
Summary of the invention
For overcoming the defects of prior art, the present invention is to provide a kind of filtering system, comprising: the first filter circuit, the second filter circuit, commutation circuit, the first collecting unit, the second collecting unit and judgement control unit;
Described the first filter circuit is connected between the first inverter and the first load;
Described the second filter circuit is connected between the second inverter and the second load;
Described commutation circuit comprises the first switch, second switch and the 3rd switch, the two ends of described the first switch respectively with the output of described the first filter circuit be connected the input of the first load and be connected, the two ends of described the 3rd switch respectively with the output of described the second filter circuit be connected the input of the second load and be connected, described second switch is connected between described the first filter circuit and described the second filter circuit, and near described the first load and described the second load;
Described the first collecting unit is connected with described the first filter circuit, is used for gathering current signal and the voltage signal of described the first filter circuit, and current signal and the voltage signal that collects is transferred to respectively described judgement control unit;
Described the second collecting unit is connected with described the second filter circuit, is used for gathering current signal and the voltage signal of described the second filter circuit and being transferred to respectively described judgement control unit;
Described judgement control unit is connected with described the first collecting unit, described the second collecting unit and the commutation circuit of being connected, and is used for switching according to the described current signal that receives and the described commutation circuit of voltage signal control.
Filtering system provided by the invention, the mode that the current signal that collects according to the first collecting unit and the second collecting unit by the judgement control unit and voltage signal are controlled the commutation circuit action, realized when a filter circuit breaks down, continue as the load supplying on the filter circuit that breaks down by another filter circuit, thereby guaranteed the normal operation of load under a filter circuit breaks down situation, also guaranteed the normal operation of whole locomotive circuit system.
Description of drawings
Fig. 1 is the circuit diagram of filtering system one embodiment of the present invention;
Fig. 2 is the mounting structure schematic diagram of each electric component in the first filter circuit and the second filter circuit in Fig. 1;
Fig. 3 is the right side view of Fig. 2.
1-the first filter circuit; 2-the second filter circuit; The 3-commutation circuit;
4-the first collecting unit; 5-the second collecting unit; 61-the first inverter;
62-the second inverter; 71-the first load; 72-the second load;
K1-the first switch; The K2-second switch; K3-the 3rd switch;
41-the first judge module; 42-the second judge module; The 511-current sensor;
512-current commutates circuit; The 521-voltage rectifying circuit; The 522-voltage conversion circuit;
16-control board assembly; 11-the first three-phase ac transformer; 12-the first filter capacitor;
13-the first Electromagnetic interference filter; The 14-copper bar; The 15-blower fan;
The 17-connecting terminal block; 10-filter cabinet casing; 16-control board assembly.
Embodiment
The present embodiment provides a kind of filtering system, comprising: the first filter circuit 1, the second filter circuit 2, commutation circuit 3, the first collecting unit 4, the second collecting unit 5 and judgement control unit;
The first filter circuit 1 is connected between the first inverter 61 and the first load 71;
The second filter circuit 2 is connected between the second inverter 62 and the second load 72;
Commutation circuit 3 comprises the first K switch 1, second switch K2 and the 3rd K switch 3, the first K switch 1 two ends respectively with the output of the first filter circuit 1 be connected the input of load 71 and be connected, the 3rd K switch 3 two ends respectively with the output of the second filter circuit 2 be connected the input of load 72 and be connected, second switch K2 is connected between the first filter circuit 1 and the second filter circuit 2, and near the first load 71 and the second load 72.
The first collecting unit 4 is connected with the first filter circuit 1, is used for gathering current signal and the voltage signal of the first filter circuit 1, and current signal and the voltage signal that collects is transferred to respectively the judgement control unit;
The second collecting unit 5 is connected with the second filter circuit 2, is used for gathering current signal and the voltage signal of the second filter circuit 2 and being transferred to respectively the judgement control unit;
The judgement control unit is connected with commutation circuit with the first collecting unit 4, the second collecting unit 5 and is connected, is used for switching according to the current signal that receives and voltage signal control commutation circuit 3.
Wherein, the first filter circuit and the second filter circuit can be filter circuit commonly used in this area; The first K switch 1, second switch K2, the 3rd K switch 3 can be contactor.
the filtering system that the present embodiment provides is when normal operation, the first K switch 1 and the 3rd K switch 3 closures, second switch K2 disconnects, the first filter circuit 1 and the second filter circuit 2 are respectively the first load 71 and the second load 72 power supplies simultaneously, simultaneously, the first collecting unit 4 and the second collecting unit 5 are transferred to the judgement control module with current signal and the voltage signal that collects respectively, in case the judgement control module judges that according to acquisition current signal and voltage signal drawing the first filter circuit 1 breaks down, make commutation circuit 3 actions, namely the first K switch 1 disconnects, second switch K2 is closed, take by the second filter circuit 2 simultaneously as the first load 71 and the second load 72 power supply, break down and judge the second filter circuit 2 when the judgement control module according to the current signal that obtains and voltage signal, make that the 3rd K switch 3 disconnects, second switch K2 is closed, to power simultaneously as the first load 71 and the second load 72 simultaneously by the first filter circuit 1.
From the above, the filtering system that the present embodiment provides can when a filter circuit breaks down, continue as the load supplying on the filter circuit that breaks down by another filter circuit, can not affect the normal operation of load, thereby guarantee the normal operation of locomotive circuit system.
Further, the judgement control unit can comprise:
The first judge module 41, be used for receiving voltage signal and the current signal of the first filter circuit 1, and compare with electric current preset value and voltage preset value in the first judge module 41, when current signal during greater than the voltage preset value, disconnects the first K switch 1 and closed second switch K2 greater than electric current preset value or voltage signal;
The second judge module 42, be used for receiving voltage signal and the current signal of the second filter circuit 2, and compare with electric current preset value and voltage preset value in the second judge module 42, when current signal during greater than the voltage preset value, disconnects the 3rd K switch 3 and closed second switch K2 greater than electric current preset value or voltage signal.
Further, the first collecting unit 4 and the second collecting unit 5 comprise respectively current acquisition module and voltage acquisition module;
The current acquisition module comprises: the current sensor 511 that is used for the current signal of collection the first filter circuit 1 and the second filter circuit 2, and the current signal that is used for form of communication that current sensor is collected is converted to current commutates circuit 512, the first filter circuits 1 of current signal of direct current form and the output of the current commutates circuit 512 of the second filter circuit 2 is connected with the second judge module 42 with the first judge module 41 respectively.Wherein, current commutates circuit 512 can be schottky bridge of the prior art, the two ends of this schottky bridge are connected directly to the first judge module 41, and (during for the current commutates circuit 512 of the current signal that be used for to gather the first filter circuit 1, the two ends of schottky bridge are connected to the first judge module 41 when this schottky bridge; And when this schottky bridge during the current commutates circuit 512 when be used for gathering the current signal of the second filter circuit 2, the two ends of this schottky bridge are connected to the second judge module 42).
Voltage acquisition module comprises: the voltage rectifying circuit 521 that is used for the voltage signal of the form of communication of the first filter circuit 1 and the second filter circuit 2 is converted to the voltage signal of direct current form, and the output that be used for to gather the voltage conversion circuit 522 of voltage conversion circuit 522, the first filter circuits 1 of voltage signal of direct current form and the second filter circuit 2 is connected with the second judge module 42 with the first judge module 41 respectively.wherein, voltage rectifying circuit 521 can be this area rectifier bridge commonly used, voltage conversion circuit 522 can be comprised of resistance and Hall element, to collect the voltage signal by the direct current form after above-mentioned rectifier bridge rectification, simultaneously, the voltage signal of high pressure can also be converted to for the voltage signal that is delivered to respectively the first judge module 41 and the second judge module 42 low pressure, therefore, this be delivered to the first judge module 41 low pressure voltage signal will with the first filter circuit 1 on the proportional variation of three-phase alternating voltage, this be delivered to the second judge module 42 low pressure voltage signal will with the second filter circuit on the proportional variation of three-phase alternating voltage., realize gathering conversion with alternating current-direct current by transducer and rectifier bridge here, make the circuit structure of this filtering system simpler; Utilize Hall element to realize gathering voltage signal and voltage transitions, can also reduce the interference that strong voltage is pressed light current.
More preferably, the first judge module 41 and the second judge module 42 all can comprise a calculator and comparator, when current commutates circuit 512 is schottky bridge, what its two output was exported is respectively positive current signal and negative current signal, above-mentioned computing module draws a current signal value with this positive current signal and negative current signal work difference, and comparator is compared this current signal value with the electric current preset value; When voltage conversion circuit 522 adopts Hall element, three outputs can be set, all be connected with the first judge module 41 or the second judge module 42 by holding wire, in three holding wires that the first judge module 41 or the second judge module 42 are connected, article one, be used for to the first judge module 41 or the second judge module 42 transmission voltage signals, all the other two are used to Hall element that operating voltage is provided; Comparator compares value and the voltage preset value of the voltage signal that receives; When the current signal that receives when the first judge module 41 or the second judge module 42 exceeds predetermined current value or voltage signal and exceeds the voltage preset value, just can judge that the filter circuit that sends this current signal or voltage signal breaks down, control commutation circuit 3 actions, disconnect corresponding switch, complete redundancy and switch.
In the above-described embodiments, current commutates circuit 512 is arranged on first circuit board, and voltage rectifying circuit 521 is arranged on second circuit board, and voltage conversion circuit 522 is arranged on the tertiary circuit plate, to facilitate installation and maintenance.
Further, please refer to Fig. 1, Fig. 2 and Fig. 3, first circuit board, second circuit board and tertiary circuit plate are fixedly installed on formation control board component 16 in same shielding box; And the first filter circuit 1 and the second filter circuit 2 can comprise respectively that the first three-phase ac transformer 11, the first filter capacitor 12 and the first Electromagnetic interference filter 13, the second filter circuits 2 can comprise the second three-phase ac transformer, the second filter capacitor and the second Electromagnetic interference filter; This filtering system also comprises a filter cabinet casing and a blower fan 15, be formed with mutually independently the first accommodating cavity, the second accommodating cavity, the 3rd accommodating cavity and the 4th accommodating cavity in filter cabinet casing 10, the first accommodating cavity is positioned at the top of filter cabinet casing 10, the second accommodating cavity is positioned at below the first accommodating cavity, the 3rd accommodating cavity and the 4th accommodating cavity for being arranged above and below by the second accommodating cavity and below the first accommodating cavity; Blower fan 15 is fixedly installed in the first accommodating cavity, so that the first three-phase ac transformer 11 and the second three-phase ac transformer are fixedly installed in the second accommodating cavity, the first filter capacitor 12 and the second filter capacitor are fixedly installed in the 3rd accommodating cavity, the first Electromagnetic interference filter 13 and the second Electromagnetic interference filter are fixedly installed in the 4th accommodating cavity, and control board assembly 16 is fixedly installed on the madial wall of the filter cabinet casing 10 in the 4th accommodating cavity.Preferably, also can be on the madial wall of filter cabinet casing 10 and the copper bar 14 of wiring between being fixedly installed be used to the element of realizing within each accommodating cavity above control board assembly 16; Filter cabinet casing 10 inside below be provided for the connecting terminal block 17 that is connected with the main circuit of electric locomotive.
The filtering system of the present embodiment is arranged on similar electric component in the interior different spaces of filter cabinet casing, can play the electromagnetic interference effect that prevents between different electric components, especially for three-phase ac transformer, because it is bearing the convert task of high low-voltage, can be to producing stronger electromagnetic interference on every side, therefore, by it being arranged in the second accommodating cavity, just facilitate, effectively reached the shielding to three-phase ac transformer; In addition, the capacity of two three-phase ac transformers is all very large, and the thermal losses meeting is very large, therefore, be provided with blower fan in the first accommodating cavity, so that three-phase ac transformer and other electric component are carried out forced air cooling, further guaranteed the normal operation of the filtering system in the filter cabinet casing.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a filtering system, is characterized in that, comprising: the first filter circuit, the second filter circuit, commutation circuit, the first collecting unit, the second collecting unit and judgement control unit;
Described the first filter circuit is connected between the first inverter and the first load;
Described the second filter circuit is connected between the second inverter and the second load;
Described commutation circuit comprises the first switch, second switch and the 3rd switch, the two ends of described the first switch respectively with the output of described the first filter circuit be connected the input of the first load and be connected, the two ends of described the 3rd switch respectively with the output of described the second filter circuit be connected the input of the second load and be connected, described second switch is connected between described the first filter circuit and described the second filter circuit, and near described the first load and described the second load;
Described the first collecting unit is connected with described the first filter circuit, is used for gathering current signal and the voltage signal of described the first filter circuit, and current signal and the voltage signal that collects is transferred to respectively described judgement control unit;
Described the second collecting unit is connected with described the second filter circuit, is used for gathering current signal and the voltage signal of described the second filter circuit and being transferred to respectively described judgement control unit;
Described judgement control unit is connected with described the first collecting unit, described the second collecting unit and the commutation circuit of being connected, and is used for switching according to the described current signal that receives and the described commutation circuit of voltage signal control.
2. filtering system according to claim 1, is characterized in that, described judgement control unit comprises:
The first judge module, be used for receiving voltage signal and the current signal of described the first filter circuit, and compare with electric current preset value and voltage preset value in described the first judge module, when described current signal during greater than described voltage preset value, disconnects described the first switch and closed described second switch greater than described electric current preset value or described voltage signal;
The second judge module, be used for receiving voltage signal and the current signal of described the second filter circuit, and compare with electric current preset value and voltage preset value in described the second judge module, when described current signal during greater than described voltage preset value, disconnects described the 3rd switch and closed described second switch greater than described electric current preset value or described voltage signal.
3. filtering system according to claim 2, is characterized in that,
Described the first collecting unit and the second collecting unit comprise respectively current acquisition module and voltage acquisition module;
Described current acquisition module comprises: for the current sensor of the described current signal that gathers described the first filter circuit and the second filter circuit, and the current commutates circuit that is converted to the described current signal of direct current form for the described current signal of the form of communication that described current sensor is collected, the output of the described current commutates circuit of described the first filter circuit and described the second filter circuit is connected with the second judge module with described the first judge module respectively;
Described voltage acquisition module comprises: the voltage rectifying circuit that is used for the described voltage signal of the form of communication of described the first filter circuit and the second filter circuit is converted to the described voltage signal of direct current form, and the voltage conversion circuit that is used for the described voltage signal of collection direct current form, the output of described the first filter circuit and the described voltage conversion circuit of the second filter circuit is connected with the second judge module with described the first judge module respectively.
4. filtering system according to claim 3, is characterized in that, described current commutates circuit is arranged on first circuit board, and described voltage rectifying circuit is arranged on second circuit board, and described voltage conversion circuit is arranged on the tertiary circuit plate.
5. filtering system according to claim 4, is characterized in that,
Described first circuit board, second circuit board and tertiary circuit plate are fixedly installed on formation control board component in same shielding box;
Described the first filter circuit comprises the first three-phase ac transformer, the first filter capacitor and the first Electromagnetic interference filter;
Described the second filter circuit comprises the second three-phase ac transformer, the second filter capacitor and the second Electromagnetic interference filter;
Described filtering system also comprises a filter cabinet casing and a blower fan, be formed with mutually independently the first accommodating cavity, the second accommodating cavity, the 3rd accommodating cavity and the 4th accommodating cavity in described filter cabinet casing, the described first accommodating cavity is positioned at the top of described filter cabinet casing, the described second accommodating cavity is positioned at below the described first accommodating cavity, the described the 3rd accommodating cavity and the described the 4th accommodating cavity for being arranged above and below by the described second accommodating cavity and below described the first accommodating cavity; Described blower fan is fixedly installed in the described first accommodating cavity, described the first three-phase ac transformer and the second three-phase ac transformer are fixedly installed in the described second accommodating cavity, described the first filter capacitor and the second filter capacitor are fixedly installed in the described the 3rd accommodating cavity, described the first Electromagnetic interference filter and the second Electromagnetic interference filter are fixedly installed in the described the 4th accommodating cavity, and described control board assembly is fixedly installed on the madial wall of the described filter cabinet casing in the described the 4th accommodating cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110412543.0A CN103166222B (en) | 2011-12-12 | 2011-12-12 | Filtering system |
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| CN201110412543.0A CN103166222B (en) | 2011-12-12 | 2011-12-12 | Filtering system |
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| CN103166222A true CN103166222A (en) | 2013-06-19 |
| CN103166222B CN103166222B (en) | 2015-03-18 |
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Cited By (6)
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| CN103840461A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic protection method of steel plant power distribution cabinet system with protection cabinets arranged at outer end |
| CN103840462A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic protection method of garage power distribution system |
| CN103840460A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic wave protection method of two-stage bus type UPS machine room power distribution system |
| CN103840459A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic protection method for power distribution system of shopping mall |
| CN106385180A (en) * | 2016-08-30 | 2017-02-08 | 中车大连电力牵引研发中心有限公司 | Converter output control device |
| CN113346495A (en) * | 2021-07-14 | 2021-09-03 | 山东博诚电气有限公司 | Motor control system and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103840461A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic protection method of steel plant power distribution cabinet system with protection cabinets arranged at outer end |
| CN103840462A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic protection method of garage power distribution system |
| CN103840460A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic wave protection method of two-stage bus type UPS machine room power distribution system |
| CN103840459A (en) * | 2013-12-16 | 2014-06-04 | 浙江尼古拉斯电气科技有限公司 | Harmonic protection method for power distribution system of shopping mall |
| CN103840462B (en) * | 2013-12-16 | 2019-03-29 | 浙江尼古拉斯电气科技有限公司 | A kind of harmonic protection method of garage distribution system |
| CN103840460B (en) * | 2013-12-16 | 2019-05-14 | 浙江尼古拉斯电气科技有限公司 | The harmonic protection method of two sections of bus-type UPS computer room distribution systems |
| CN103840461B (en) * | 2013-12-16 | 2019-05-14 | 浙江尼古拉斯电气科技有限公司 | Steel plant's power distribution cabinet system harmonic protection method of outer end is arranged in protection cabinets |
| CN103840459B (en) * | 2013-12-16 | 2019-05-14 | 浙江尼古拉斯电气科技有限公司 | A kind of harmonic protection method of market distribution system |
| CN106385180A (en) * | 2016-08-30 | 2017-02-08 | 中车大连电力牵引研发中心有限公司 | Converter output control device |
| CN113346495A (en) * | 2021-07-14 | 2021-09-03 | 山东博诚电气有限公司 | Motor control system and method |
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Address after: 044502 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Patentee after: CRRC YONGJI ELECTRIC CO., LTD. Address before: 044502 Shanxi city of Yuncheng province Yongji City Motor Street No. 18 Patentee before: Yongji Xinshisu Motor Electrical Appliance Co., Ltd. |
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