CN103166222B - Filtering system - Google Patents
Filtering system Download PDFInfo
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- CN103166222B CN103166222B CN201110412543.0A CN201110412543A CN103166222B CN 103166222 B CN103166222 B CN 103166222B CN 201110412543 A CN201110412543 A CN 201110412543A CN 103166222 B CN103166222 B CN 103166222B
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- circuit
- filter circuit
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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, particularly relate to a kind of filtering system of electric locomotive power supply system.
Background technology
In electric locomotive, usually by subordinate inverter, Electric Locomotive Auxiliary System is powered, DC power supply can be converted to pulse width modulation (Pulse WidthModulation by subordinate inverter, be called for short PWM) ripple, PWM ripple more after filtering processing of circuit become quasi-sine-wave.
Filter circuit of the prior art only has one or two independently filter circuit usually.Operationally, the filter circuit of a filter circuit can only be a load supplying to this filter circuit, or by two independently filter circuit be respectively different load supplyings.The defect of this filter circuit of the prior art is, when the filter circuit for a load supplying breaks down, just must cut off this filter circuit, to making this load normally work, thus causes the electric power system of locomotive cannot normal power supply.
Summary of the invention
For overcoming the above-mentioned defect 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 judge control unit;
Described first filter circuit is connected between the first inverter and the first load;
Described 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 first switch are connected with the output of described first filter circuit and the input of described first load respectively, the two ends of described 3rd switch are connected with the output of described second filter circuit and the input of described second load respectively, described second switch is connected between described first filter circuit and described second filter circuit, and near described first load and described second load;
Described first collecting unit, is connected with described first filter circuit, for gathering current signal in described first filter circuit and voltage signal, and the current signal collected and voltage signal is transferred to described judgement control unit respectively;
Described second collecting unit, is connected with described second filter circuit, for gathering current signal in described second filter circuit and voltage signal and being transferred to described judgement control unit respectively;
Described judgement control unit, is connected with described first collecting unit, described second collecting unit and described commutation circuit, switches for controlling described commutation circuit according to the described current signal received and voltage signal.
Filtering system provided by the invention, by judging that the current signal that control unit collects according to the first collecting unit and the second collecting unit and voltage signal control the mode of commutation circuit action, achieve when a filter circuit breaks down, the load supplying on the filter circuit broken down is continued as by another filter circuit, thus ensure that the normal work of load under a filter circuit breaks down situation, also ensure that the normal work of whole locomotive circuit system.
Accompanying drawing explanation
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 Fig. 1 in the first filter circuit and the second filter circuit;
Fig. 3 is the right side view of Fig. 2.
1-first filter circuit; 2-second filter circuit; 3-commutation circuit;
4-first collecting unit; 5-second collecting unit; 61-first inverter;
62-second inverter; 71-first load; 72-second load;
K1-first switch; K2-second switch; K3-the 3rd switch;
41-first judge module; 42-second judge module; 511-current sensor;
512-current commutates circuit; 521-voltage rectifying circuit; 522-voltage conversion circuit;
16-control board assembly; 11-first three-phase ac transformer; 12-first filter capacitor;
13-first Electromagnetic interference filter; 14-copper bar; 15-blower fan;
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, second filter circuit 2, commutation circuit 3, first collecting unit 4, second collecting unit 5 and judge control unit;
First filter circuit 1 is connected between the first inverter 61 and the first load 71;
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, first K switch 1 two ends are connected with the output of the first filter circuit 1 and the input of the first load 71 respectively, 3rd K switch 3 two ends be connected with the output of the second filter circuit 2 and the input of the second load 72 respectively, 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.
First collecting unit 4, is connected with the first filter circuit 1, for gathering current signal and the voltage signal of the first filter circuit 1, and the current signal collected and voltage signal is transferred to judgement control unit respectively;
Second collecting unit 5, is connected with the second filter circuit 2, is also transferred to judgement control unit respectively for the current signal and voltage signal gathering the second filter circuit 2;
Judging control unit, be connected with the first collecting unit 4, second collecting unit 5 and commutation circuit 3, switching for controlling commutation circuit 3 according to the current signal received and voltage signal.
Wherein, the first filter circuit and the second filter circuit can be filter circuit conventional in this area; 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 normally working, first K switch 1 and the 3rd K switch 3 close, second switch K2 disconnects, first filter circuit 1 and the second filter circuit 2 are respectively the first load 71 simultaneously and the second load 72 is powered, simultaneously, the current signal collected and voltage signal are transferred to judgement control module by the first collecting unit 4 and the second collecting unit 5 respectively, once judge that control module judges to show that the first filter circuit 1 breaks down according to obtained current signal and voltage signal, then make commutation circuit 3 action, namely the first K switch 1 disconnects, second switch K2 closes, being that the first load 71 and the second load 72 are powered by the second filter circuit 2 simultaneously, and when judging according to obtained current signal and voltage signal, control module judges that the second filter circuit 2 breaks down, then make that the 3rd K switch 3 disconnects, second switch K2 closes, being that the first load 71 and the second load 72 are powered by the first filter circuit 1 simultaneously simultaneously.
From the above, the filtering system that the present embodiment provides, when a filter circuit breaks down, can continue as the load supplying on the filter circuit broken down by another filter circuit, the normal work of load can not be affected, thus ensure that the normal work of locomotive circuit system.
Further, judge that control unit can comprise:
First judge module 41, for receiving voltage signal and the current signal of the first filter circuit 1, and compare with voltage preset value with the electric current preset value in the first judge module 41, when current signal is greater than electric current preset value or voltage signal is greater than voltage preset value, disconnect the first K switch 1 and closed second switch K2;
Second judge module 42, for receiving voltage signal and the current signal of the second filter circuit 2, and compare with voltage preset value with the electric current preset value in the second judge module 42, when current signal is greater than electric current preset value or voltage signal is greater than voltage preset value, disconnect the 3rd K switch 3 and closed second switch K2.
Further, the first collecting unit 4 and the second collecting unit 5 comprise current acquisition module and voltage acquisition module respectively;
Current acquisition module comprises: for gathering the current sensor 511 of the current signal in the first filter circuit 1 and the second filter circuit 2, and be connected with the second judge module 42 with the first judge module 41 respectively with the output of the current commutates circuit 512 of the second filter circuit 2 for current commutates circuit 512, first filter circuit 1 that the current signal of the form of communication collected by current sensor is converted to the current signal of DC form.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 (when this schottky bridge is the current commutates circuit 512 of current signal for gathering the first filter circuit 1, the two ends of schottky bridge are connected to the first judge module 41; And during current commutates circuit 512 when this schottky bridge is the current signal for gathering the second filter circuit 2, the two ends of this schottky bridge are then connected to the second judge module 42).
Voltage acquisition module comprises: for the voltage signal of the form of communication in the first filter circuit 1 and the second filter circuit 2 being converted to the voltage rectifying circuit 521 of the voltage signal of DC form, and be connected with the second judge module 42 with the first judge module 41 respectively with the output of the voltage conversion circuit 522 of the second filter circuit 2 for voltage conversion circuit 522, first filter circuit 1 of the voltage signal gathering DC form.Wherein, voltage rectifying circuit 521 can be the conventional rectifier bridge in this area, voltage conversion circuit 522 can be made up of resistance and Hall element, to collect the voltage signal of the DC form after by above-mentioned rectifier bridge rectification, simultaneously, the voltage signal of high pressure can also be converted to the voltage signal for being delivered to the first judge module 41 and the second judge module 42 low pressure respectively, therefore, this voltage signal being delivered to the low pressure of the first judge module 41 by with the proportional change of three-phase alternating voltage on the first filter circuit 1, this voltage signal being delivered to the low pressure of the second judge module 42 is by change proportional with the three-phase alternating voltage on the second filter circuit.Here, realized the conversion of collection and alternating current-direct current by transducer and rectifier bridge, make the circuit structure of this filtering system simpler; Utilize Hall element to realize and gather voltage signal and voltage transitions, the interference of strong voltage to light current pressure can also be reduced.
More preferably, 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 exported is positive current signal and negative current signal respectively, this positive current signal and negative current signal are made difference and are drawn a current signal value by above-mentioned computing module, comparator by this current signal value compared with 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 be connected with the first judge module 41 or the second judge module 42, article one, for the first judge module 41 or the second judge module 42 transmission voltage signal, all the other two for providing operating voltage for Hall element; The value of the voltage signal received and voltage preset value compare by comparator; When the current signal that the first judge module 41 or the second judge module 42 receive exceeds pre-set current value or voltage signal exceeds voltage preset value, just can judge that the filter circuit sending this current signal or voltage signal breaks down, then control commutation circuit 3 action, 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 arranges on the second circuit board, and voltage conversion circuit 522 is arranged on 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 the first three-phase ac transformer 11, first filter capacitor 12 respectively and the first Electromagnetic interference filter 13, the second filter circuit 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, mutual independently the first accommodating cavity, the second accommodating cavity, the 3rd accommodating cavity and the 4th accommodating cavity is formed in filter cabinet casing 10, first accommodating cavity is positioned at the top of filter cabinet casing 10, second accommodating cavity is positioned at below the first accommodating cavity, is the 3rd accommodating cavity that is arranged above and below and the 4th accommodating cavity by the second accommodating cavity and in the below of the first accommodating cavity; Blower fan 15 is fixedly installed in the first accommodating cavity, to be fixedly installed in the second accommodating cavity to the first three-phase ac transformer 11 and the second three-phase ac transformer, first filter capacitor 12 and the second filter capacitor are fixedly installed in the 3rd accommodating cavity, 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, the copper bar 14 of wiring between the element for realizing within each accommodating cavity also can be fixedly installed on the madial wall of filter cabinet casing 10 and above control board assembly 16; Bottom in filter cabinet casing 10 inside arranges the connecting terminal block 17 being used for being connected with the main circuit of electric locomotive.
Similar electric component is arranged in the different spaces in filter cabinet casing by the filtering system of the present embodiment, the electromagnetic interference effect prevented between different electric component can be played, especially for three-phase ac transformer, because it carries the convert task of high-low voltage, can to producing stronger electromagnetic interference around, therefore, by being arranged in the second accommodating cavity, just convenient, effectively reach shielding to three-phase ac transformer; In addition, the capacity of two three-phase ac transformers is all very large, and thermal losses can be very large, therefore, in the first accommodating cavity, be provided with blower fan, to carry out forced air cooling to three-phase ac transformer and other electric component, further ensure the normal work of the filtering system in filter cabinet casing.
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 (1)
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 judge control unit;
Described first filter circuit is connected between the first inverter and the first load;
Described 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 first switch are connected with the output of described first filter circuit and the input of described first load respectively, the two ends of described 3rd switch are connected with the output of described second filter circuit and the input of described second load respectively, described second switch is connected between described first filter circuit and described second filter circuit, and near described first load and described second load;
Described first collecting unit, is connected with described first filter circuit, for gathering current signal in described first filter circuit and voltage signal, and the current signal collected and voltage signal is transferred to described judgement control unit respectively;
Described second collecting unit, is connected with described second filter circuit, for gathering current signal in described second filter circuit and voltage signal and being transferred to described judgement control unit respectively;
Described judgement control unit, is connected with described first collecting unit, described second collecting unit and described commutation circuit, switches for controlling described commutation circuit according to the described current signal received and voltage signal;
Described judgement control unit comprises:
First judge module, for receiving voltage signal and the current signal of described first filter circuit, and compare with voltage preset value with the electric current preset value in described first judge module, when described current signal is greater than described electric current preset value or described voltage signal is greater than described voltage preset value, disconnect described first switch and closed described second switch;
Second judge module, for receiving voltage signal and the current signal of described second filter circuit, and compare with voltage preset value with the electric current preset value in described second judge module, when described current signal is greater than described electric current preset value or described voltage signal is greater than described voltage preset value, disconnect described 3rd switch and closed described second switch;
Described first collecting unit and the second collecting unit comprise current acquisition module and voltage acquisition module respectively;
Described current acquisition module comprises: for gathering the current sensor of the described current signal in described first filter circuit and the second filter circuit, and the current commutates circuit of the described current signal of DC form is converted to for the described current signal of the form of communication collected by described current sensor, described first filter circuit is connected with the second judge module with described first judge module respectively with the output of the described current commutates circuit of described second filter circuit;
Described voltage acquisition module comprises: for the described voltage signal of the form of communication in described first filter circuit and the second filter circuit being converted to the voltage rectifying circuit of the described voltage signal of DC form, and for the voltage conversion circuit of the described voltage signal that gathers DC form, described first filter circuit is connected with the second judge module with described first judge module respectively with the output of the described voltage conversion circuit of the second filter circuit;
Described current commutates circuit is arranged on first circuit board, and described voltage rectifying circuit is arranged on the second circuit board, and described voltage conversion circuit is arranged on tertiary circuit plate;
Described first circuit board, second circuit board and tertiary circuit plate are fixedly installed on formation control board component in same shielding box;
Described first filter circuit comprises the first three-phase ac transformer, the first filter capacitor and the first Electromagnetic interference filter;
Described 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, mutual independently the first accommodating cavity, the second accommodating cavity, the 3rd accommodating cavity and the 4th accommodating cavity is formed in described filter cabinet casing, described first accommodating cavity is positioned at the top of described filter cabinet casing, described second accommodating cavity is positioned at below described first accommodating cavity, is the described 3rd accommodating cavity that is arranged above and below and described 4th accommodating cavity by described second accommodating cavity and in the below of described first accommodating cavity; Described blower fan is fixedly installed in described first accommodating cavity, described first three-phase ac transformer and the second three-phase ac transformer are fixedly installed in described second accommodating cavity, described first filter capacitor and the second filter capacitor are fixedly installed in described 3rd accommodating cavity, described first Electromagnetic interference filter and the second Electromagnetic interference filter are fixedly installed in described 4th accommodating cavity, and described control board assembly is fixedly installed on the madial wall of the described filter cabinet casing in described 4th accommodating cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110412543.0A CN103166222B (en) | 2011-12-12 | 2011-12-12 | Filtering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110412543.0A CN103166222B (en) | 2011-12-12 | 2011-12-12 | Filtering system |
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| CN103166222A CN103166222A (en) | 2013-06-19 |
| CN103166222B true CN103166222B (en) | 2015-03-18 |
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| CN201110412543.0A Active CN103166222B (en) | 2011-12-12 | 2011-12-12 | Filtering system |
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| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN113346495B (en) * | 2021-07-14 | 2023-04-21 | 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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