CN103715909A - Electric locomotive electronic mutual inductor and application method thereof - Google Patents
Electric locomotive electronic mutual inductor and application method thereof Download PDFInfo
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Abstract
The invention discloses an electric locomotive electronic mutual inductor and an application method thereof. The mutual inductor comprises a voltage dividing circuit, an overvoltage protection circuit, a high voltage side photoelectric isolation processing unit circuit and a low voltage amplification circuit, wherein the output end of the voltage dividing circuit is connected with the input ends of the overvoltage protection circuit and the high voltage side photoelectric isolation processing unit circuit; the overvoltage protection circuit is grounded; the output end of the high voltage side photoelectric isolation processing unit circuit is connected with the low voltage amplification circuit; the voltage dividing circuit draws electricity from a high voltage contact network and directly divides high voltage into low voltage AC signals, and the voltage, after photoelectric isolation and signal reduction processing by the high voltage side photoelectric isolation processing unit circuit, is also converted into the low voltage AC signals for use of a rear-stage low voltage amplification circuit; and the low voltage amplification circuit is used for shaping of photoelectric isolation signals and at the same time performing feedback on the forward output of a linear optical coupler to enable the conversion precision of the linear optical coupler to meet design requirements. The mutual inductor and the application method, provided by the invention, have the advantages of small size, light weight, loss power consumption, good stability, high safety performance and the like.
Description
Technical field
The present invention relates to a kind of device of measuring line voltage, specifically, relate to a kind of use for electric locomotive outdoor electronic formula voltage transformer and the purposes in electric locomotive thereof.
Background technology
As everyone knows; electric locomotive obtains the single phase industrial frequence alternating current of 25kV, 50Hz from contact line; contact line high pressure is delivered to the traction transformer of locomotive inside through pantograph, main circuit breaker, high-tension current inductor, and high voltage potential transformer on locomotive is mainly realized contact line voltage measurement, power calculation and defencive function.High voltage potential transformer (being generally 25kV/100V or 25kV/150V) is parallel on roof 25kV high voltage bus; 25kV is down to 100V(or 150V) offer that locomotive network pressure gauge shows and the voltage source of locomotive kilowatt-hour meter; through transformer pressure-reducing (100/5 or 150/5) output AC 5V, for locomotive microcomputer cabinet, carry out locomotive protection again.
At present, electric locomotive is mainly to use traditional electromagnetic potential transformer to the measurement of former limit line voltage.Be subject to the restriction of instrument transformer mechanism, traditional voltage transformer has and is subject to net to press high order harmonic component to affect greatly, easily occur ferro resonance or iron core magnetic is full, and may cause iron core heating to surpass design load; At locomotive, cross in the process of non-Electric region and also may cause overvoltage, its output can not short circuit etc. shortcoming.Especially along with the generally utilization of Harmony electric locomotive, cause railway power supply net to produce the harmonic component of a large amount of different frequencies, make at present traditional electromagnetic potential transformer internal short-circuit, be burnt, burst, even cause the faults such as phenomenon on fire again and again to occur, it has had a strong impact on the safe operation of electric locomotive, traditional electromagnetic potential transformer output is directly connected with car-mounted device on the other hand, when a winding electric discharge of instrument transformer or insulation breakdown, high voltage may enter the safety that secondary side jeopardizes personnel and instrumentation.In order to guarantee the insulation effect of voltage transformer, traditional instrument transformer volume is large, and Heavy Weight is installed inconvenience, and self consumes energy, consumptive material is higher, unfavorable environmental protection.
Electronic mutual inductor is current in electric power system, apply more, its compare with traditional electromagnetic potential transformer have advantages of following: insulation property are good, low price; Anti-electromagnetic interference performance is good, and step-down side short circuit is without overheated danger; The linearity is good, without saturated phenomenon; Volume is little, lightweight, conserve space; Be applicable to up-to-date digitlization, the electric power system of Microcomputer.Why electronic type voltage transformer is not applied in electric locomotive, and main cause is:
1, the corresponding world or the national standard of civilian electronic mutual inductor are just issued, and electronic mutual inductor on railway electric locomotive does not have the corresponding world or country or industry standard, the various parameter values of fubaritic electronic mutual inductor and accuracy meet the world or national measuring requirement.
2, former electronic type voltage transformer; especially the technology such as high-voltage signal sampling and high pressure buffer circuit processing (comprising its dividing potential drop sample material, overvoltage protecting device) with regard to its in security reliability in civilian power system also in the exploratory experiment stage; it directly affects the safe operation of subsequent conditioning circuit and even whole power transmission network; and the safe operation of electric locomotive is the assurance of passenger's person and property safety in global rail transportation system, with regard to electric locomotive general principle of design, be not consider to use jejune technology.
3, on national grid, used in the past electronic type voltage transformer time, actual conditions to the inapplicable power network of consideration of the harmonic component of electrical network, the harmonic wave of railway contact line during mainly from alternating current electric locomotive electric braking by the energy back of its generating to electrical network, thereby reach energy-conservation object.But what adopt due to the brake power generating of locomotive is AC-DC-AC inversion transformation technique, its main harmonic component is mainly reflected in middle low-order harmonic, mainly consider that with electrical network high order harmonic component is different, the electronic type voltage transformer generally using on therefore current national grid can not be used the voltage measurement of railway contact electrical network.
4, China's electric locomotive in the past adopts traditional electromagnetic potential transformer to the measurement of former limit line voltage, and when in rail transportation system, orthogonal electric locomotive is handed in a large amount of uses, its failure rate is not too high.
Therefore be necessary prior art to improve, take the corresponding world of existing electronic mutual inductor or the standard that country issues is simultaneously that benchmark creates railway systems electronic mutual inductor standard and country and international industry standard.
Summary of the invention
For the electromagnetic potential transformer of applying on current power locomotive and reliability is low, a little less than antijamming capability, Frequent Troubles, security performance be low, the technological deficiency that cannot meet intelligent demand, the invention provides a kind of simple in structure, reliability is high, antijamming capability is strong, the little lightweight use for electric locomotive electronic type voltage transformer of volume, and its using method in electric locomotive is disclosed, solve problems of the prior art.
The technical scheme that technical solution problem of the present invention adopts is:
A use for electric locomotive electronic mutual inductor, comprising:
Bleeder circuit, described bleeder circuit is electric resistance partial pressure type structure, choosing of divider resistance select can resist in the resistance that impacts of low-order harmonic, bleeder circuit carries out dividing potential drop sampling to the high voltage of electrical network;
Overvoltage crowbar, input connects the output of described voltage divider, and output ground connection, for whole instrument transformer provides overvoltage protection;
High-pressure side photoelectricity isolation processing element circuit, input connects described bleeder circuit, output connects low pressure amplifier circuit, high-pressure side photoelectricity isolation processing element circuit passes through electricity/optical coupler dividing potential drop sampled signal, take light as medium, transmission of electric signals is converted to light signal, again light signal is converted to the signal of telecommunication and passes in subsequent conditioning circuit, subsequent conditioning circuit is reached to insulation blocking effect;
Low pressure amplifying circuit, input connects described high-pressure side photoelectricity isolation processing element circuit, output junctor vehicle device, low pressure amplifying circuit is that the low-voltage ac signal that high-pressure side photoelectricity isolation processing element circuit is sent is nursed one's health, and output voltage is directly for locomotive microcomputer control cabinet and other equipment.
Further, also comprise power amplification circuit, described power amplification circuit input connects described low pressure amplifying circuit, output junctor vehicle device, power amplification circuit carries out multistage AC power amplification low-voltage ac signal, and the conditioning of boosting, transfer out the AC analogue signal that voltage level is larger.
Further, when described power amplification circuit exports electric locomotive to, be to isolate feedback output by transformer, the fan-out of transformer feeds back to the drive end of transformer.
Further, described electronic type voltage transformer also comprises digital signal processing circuit, digital signal processing circuit input connects low pressure amplifying circuit, output junctor vehicle device, digital signal processing circuit is converted to digital signal the low-voltage ac signal of low pressure amplifying circuit output and exports by RS485 interface requirement, for locomotive.
Described digital signal processing circuit comprises A/D converter, controller and RS485 network interface, three connects successively, it is the AC signal of 0-5V that net after signal condition is pressed signal, to press signal by Internet Transmission net, must press signal to convert digital signal on the net of simulation, adopt high-precision A/D converter, the AC signal of simulation is converted to the effective value network signal of digital quantity; Controller is for controlling communicating by letter between electronic type voltage transformer and electric locomotive control system, and RS485 network interface is for output network signal.
Further, described high-pressure side photoelectricity isolation processing element circuit, low pressure amplifying circuit, power amplification circuit and digital signal processing circuit be by the power supply of insulating power supply independently, and described independently insulating power supply is all from locomotive DC110V power supply power taking and have respectively redundancy output.
A using method for use for electric locomotive electronic type voltage transformer, comprising:
(1) this electronic type voltage transformer is applied in the existing not electric locomotive with network control system, using the output as electronic type voltage transformer of low pressure amplifying circuit and power amplification circuit, its external interface is identical with the external interface of existing electromagnetic potential transformer, by voltage divider, from high-voltage contact net power taking, by the output of signal amplification module, met the AC analogue signal of electric locomotive technical standard, replace original electromagnetic potential transformer;
(2) this electronic type voltage transformer is applied in new network control electric locomotive, using the output of digital signal processing circuit as electronic type voltage transformer, by RS485 interface, as external interface output digit signals, to new network, controlled the control network of electric locomotive, by voltage divider, from high-voltage contact net power taking, by network signal modular converter output network signal, to new network, controlled the network interface of electric locomotive, replace original electromagnetic potential transformer, by new network, control the control network of electric locomotive car load is controlled.
Further, in every electric locomotive, be equipped with standby electronic type voltage transformer, this standby electronic type voltage transformer is in parallel with primary electron formula voltage transformer by change over switch, when primary electron formula voltage transformer breaks down, by change over switch, standby electronic type voltage transformer is devoted oneself to work, electric locomotive can normally be moved.
The invention has the advantages that:
(1) electronic type voltage transformer of the present invention choosing of divider resistance select can resist in the resistance that impacts of low-order harmonic, reduce middle low-order harmonic impact with high-voltage mutual inductor to locomotive of railway contact line, use high-pressure side photoelectricity isolation processing element circuit to replace original spread fiber, electrical-optical-the electric process of spread fiber need to be longer connection line of optic fibre, complex structure, volume is larger, and use high-pressure side photoelectricity isolation processing element circuit, in a device, just can realize the conversion of electrical-optical-electricity, stepping simplifies the structure, isolation Level is also high than spread fiber, make this electronic type voltage transformer there is less volume, lighter weight and stronger stability and anti-interference,
(2) output of electronic type voltage transformer of the present invention rear end adopts simulation and digital circuit Mixed Design, both can provide the analog signal output of different electric pressures, digital signal output also can be provided, can meet the requirement of conventional electric power locomotive, can meet again new network and control the demand of electric locomotive, have advantages of that the scope of application is wide, highly versatile;
(3) described power amplification circuit adopts transformer isolation output, and the output of transformer is fed back to the drive end of transformer, can avoid the output transformer causing due to transformer output short-circuit to damage; And owing to adopting degenerative control mode in analog signal output, the precision that has effectively improved the transformer way of output is controlled, carrying load ability.
(4) using method of electronic type voltage transformer of the present invention, retains the connection excuse of traditional electromagnetic transformer, only needs to change instrument transformer itself, and operation is simple, changes difficulty low, is conducive to use on a large scale in conventional locomotive;
(5) using method of electronic type voltage transformer of the present invention, on the basis of original electronic type voltage transformer, increase standby instrument transformer, the in the situation that of former mulual inductor malfunction, can enable in time standby instrument transformer by change over switch, security performance while greatly having increased train operation, ensures whole service process.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of electronic type voltage transformer of the present invention;
Fig. 2 is the electrical block diagram of electronic type voltage transformer assembling power amplification circuit of the present invention;
Fig. 3 is the electrical block diagram of electronic type voltage transformer assembling power amplification circuit of the present invention and digital signal processing circuit;
Fig. 4 is the electrical block diagram of electronic type voltage transformer embodiment 1 of the present invention;
Fig. 5 is the electrical block diagram of electronic type voltage transformer embodiment 2 of the present invention;
Wherein Fig. 4, Fig. 5 only draw respectively the structure of its in running order circuit unit according to its purposes;
In figure, 1-resistor voltage divider circuit, 2-overvoltage crowbar, 3-high-pressure side photoelectricity isolation processing element circuit; 4-low pressure amplifying circuit, 5-power amplification circuit, 6-digital signal processing circuit, 7-A/D converter; 8-controller, 9-RS485 network interface, 10,11-change over switch.
Embodiment
Below in conjunction with the drawings and specific embodiments, further set forth technical scheme of the present invention.
As shown in Figure 1, a kind of use for electric locomotive electronic mutual inductor, comprises
High-pressure side photoelectricity isolation processing element circuit 3, input connects described bleeder circuit, output connects low pressure amplifier circuit, high-pressure side photoelectricity isolation processing element circuit passes through electricity/optical coupler dividing potential drop sampled signal, take light as medium, transmission of electric signals is converted to light signal, again light signal is converted to the signal of telecommunication and passes in subsequent conditioning circuit, subsequent conditioning circuit is reached to insulation blocking effect;
Low pressure amplifying circuit 4, input connects described high-pressure side photoelectricity isolation processing element circuit, output junctor vehicle device, low pressure amplifying circuit is that the low-voltage ac signal that high-pressure side photoelectricity isolation processing element circuit is sent is nursed one's health, and output voltage is directly for locomotive microcomputer control cabinet and other equipment.
Described resistor voltage divider circuit 1 output connects the input of overvoltage crowbar 2 and high-pressure side photoelectricity isolation processing element circuit 3, described overvoltage crowbar 2 ground connection, the output of described high-pressure side photoelectricity isolation processing element circuit 3 connects described low pressure amplifying circuit 4, described resistor voltage divider circuit 1 is from the power taking of 25kVAC high-voltage contact net, directly 25kV high pressure is divided into 0-5V low-voltage ac signal, through high-pressure side photoelectricity isolation processing element circuit 3, carry out photoelectricity isolation, signal reduction becomes 0-5V low-voltage ac signal after processing equally, for rear class low pressure amplifying circuit 4, low pressure amplifying circuit 4 is for carrying out shaping to photoelectricity isolation signals, the forward output of linear optical coupling is fed back simultaneously, make the conversion accuracy of linear optical coupling reach designing requirement, with aviation plug, export locomotive equipment to, as locomotive microcomputer control cabinet or intelligent electric meter etc., can effectively bear locomotive vibration, sleet corrodes.Electronic type voltage transformer of the present invention choosing of divider resistance select can resist in the resistance that impacts of low-order harmonic, reduce middle low-order harmonic impact with high-voltage mutual inductor to locomotive of railway contact line, use high-pressure side photoelectricity isolation processing element circuit to replace original spread fiber, electrical-optical-the electric process of spread fiber need to be longer connection line of optic fibre, complex structure, volume is larger, and use high-pressure side photoelectricity isolation processing element circuit, in a device, just can realize the conversion of electrical-optical-electricity, stepping simplifies the structure, isolation Level is also high than spread fiber, make this electronic type voltage transformer there is less volume, lighter weight and stronger stability and anti-interference,
As shown in Figure 2, as further execution mode of the present invention, this use for electric locomotive electronic mutual inductor also comprises power amplification circuit 5, described power amplification circuit 5 inputs connect described low pressure amplifying circuit 4, output junctor vehicle device, power amplification circuit 5 carries out multistage AC power amplification low-voltage ac signal, and the conditioning of boosting, transfer out the AC analogue signal that voltage level is larger, as 25kV/100V or 25kV/150V etc., directly (as: net is pressed the voltage source input of table input and locomotive kilowatt-hour meter to junctor vehicle device, also can connect locomotive microcomputer control cabinet as special-purpose merit mend transformer input or for the pull-in control system of alternating current electric locomotive etc.).
As further execution mode of the present invention, when described power amplification circuit exports electric locomotive to, be to isolate feedback output by transformer, the fan-out of transformer feeds back to the drive end of transformer.
As shown in Figure 3, as further execution mode of the present invention, described electronic type voltage transformer also comprises digital signal processing circuit 6, digital signal processing circuit 6 inputs connect low pressure amplifying circuit 4, output junctor vehicle device, digital signal processing circuit 6 is converted to the low-voltage ac signal of low pressure amplifying circuit output digital signal and outputs to new network controller car team car intelligent network CMT input by RS485 interface requirement, for locomotive.Electronic type voltage transformer of the present invention is compared with traditional electronic type voltage transformer, has increased network output function, and directly output network signal, meets the demand that new network is controlled electric locomotive.
As shown in Figure 3, as further execution mode of the present invention, described digital signal processing circuit 6 comprises A/D converter 7, controller 8 and RS485 network interface 9, three connects successively, it is the AC signal of 0-5V that net after signal condition is pressed signal, press signal by Internet Transmission net, must press signal to convert digital signal on the net of simulation, adopt high-precision A/D converter 7, the AC signal of simulation is converted to the effective value network signal of digital quantity; Controller 8 is for controlling communicating by letter between electronic type voltage transformer and electric locomotive control system, and RS485 network interface 10 is for output network signal.
As further execution mode of the present invention, described high-pressure side photoelectricity isolation processing element circuit, low pressure amplifying circuit, power amplification circuit and digital signal processing circuit be by the power supply of insulating power supply independently, and described independently insulating power supply is all from locomotive DC110V power supply power taking and have respectively redundancy output.
As the using method of a kind of use for electric locomotive electronic type voltage transformer of the present invention, for dissimilar locomotive (being mainly that traditional non-network control electric locomotive and new network are controlled electric locomotive), there is different usings method, comprising:
(1) this electronic type voltage transformer is applied in the existing not electric locomotive with network control system, using the output as electronic type voltage transformer of low pressure amplifying circuit and power amplification circuit, its external interface is identical with the external interface of existing electromagnetic potential transformer, by voltage divider, from high-voltage contact net power taking, by the output of signal amplification module, met the AC analogue signal of electric locomotive technical standard, replace original electromagnetic potential transformer;
(2) this electronic type voltage transformer is applied in new network control electric locomotive, using the output of digital signal processing circuit as electronic type voltage transformer, by RS485 interface, as external interface output digit signals, to new network, controlled the control network of electric locomotive, by voltage divider, from high-voltage contact net power taking, by network signal modular converter output network signal, to new network, controlled the network interface of electric locomotive, replace original electromagnetic potential transformer, by new network, control the control network of electric locomotive car load is controlled.
Further execution mode as the using method of a kind of use for electric locomotive electronic type voltage transformer of the present invention, in every electric locomotive, be equipped with standby electronic type voltage transformer, this standby electronic type voltage transformer is in parallel with primary electron formula voltage transformer by change over switch, when primary electron formula voltage transformer breaks down, by change over switch, standby electronic type voltage transformer is devoted oneself to work, electric locomotive can normally be moved.
The product of embodiment 1 is that the High Voltage Electromagnetic Instrument Transformers for substituting in non-network control electric locomotive designs, its structure as shown in Figure 4, take the high Redundancy Design of two-way, in figure, A is primary electron formula voltage transformer, B is standby electronic type voltage transformer, by change over switch 10, switch, the electromagnetic type high-voltage mutual inductor that its external interface is now installed with locomotive is identical, be beneficial to and replace the original electromagnetic type high-voltage mutual inductor of electric locomotive, reduce the difficulty of changing electronic high-voltage transformer of the present invention.Each circuit module specific works is as follows:
Resistor voltage divider circuit: voltage grading resistor is mainly used in the net of locomotive input to compress into row step-down and sampling, the net that makes to input in locomotive presses signal by 25kVAC, to be converted to the low-voltage signal of 0-5VAC, at low-voltage output, increase overvoltage absorbing circuit as overvoltage protection, prevent that net side instantaneous pressure string is as low tension loop, thereby the circuit of protection low-pressure end, the signal output of low-pressure end 0-5VAC adopts the aviation plug of IP67 degree of protection, can effectively bear locomotive vibration, sleet corrodes, 5 meters of 0-5VAC signal output distances, meet net and press the required distance of signal leading locomotive inside, voltage divider precision reaches leads 0.2 grade, other technologies index meets GB/T20840.7-2006 and bar 3, bar 4 standards,
High-pressure side photoelectricity isolation processing element circuit: the net of the 0-5VAC exporting from voltage grading resistor is pressed signal, first pass through the isolation of linear photoconductor, isolation voltage grade is 2500VAC, 1min, make the high pressure isolation of other circuit of subsequent conditioning circuit and locomotive and electrical network, it is the power supply changeover device of 2500VAC, 1min that linear photoelectric isolation front end adopts isolation voltage grade, linear photoelectric isolation makes the net of 0-5VAC press signal after photoelectricity isolation conversion, to become equally the isolation signals of 0-5VAC, for the signal condition of rear class, linear photoelectric isolation conversion accuracy is 0.2 grade;
Low pressure amplifying circuit: signal conditioning circuit is mainly used in the shaping to photoelectricity isolation signals feeds back the forward output of linear optical coupling simultaneously, makes the conversion accuracy of linear optical coupling reach designing requirement;
Signal amplification module: it is to press signal to convert the AC signal of 0-100V or 0-150V to the AC network of 0-5V that signal amplifies, meet the requirement that locomotive control and net pressure table show, the output capacity of this circuit is 30VA, identical with the electromagnetic type high-voltage mutual inductor of the non-network control electric locomotive of tradition, it is without locomotive circuit is transformed that locomotive is changed electronic type voltage transformer;
Insulating power supply: described high-pressure side photoelectricity isolation processing element circuit, low pressure amplifying circuit and signal amplification module are by independently insulating power supply power supply, described independently insulating power supply has respectively redundancy output, and meet locomotive vibration and temperature requirement, they are respectively:
1, be the insulating power supply that the DC110V of the rear end power supply of low pressure amplifying circuit and high-pressure side photoelectricity isolation processing element circuit becomes DC ± 15V, power output is 15W, and the transfer power of this insulating power supply has 50% port redundancy;
2, be the withstand voltage insulating power supply of height of photoelectric isolation module front end power supply, the isolation voltage of this power supply is that AC1500V exchanges, and power output is 2W;
3, the insulating power supply that becomes DC ± 200V for the DC110V of signal amplification module power supply, power output is 50W, the transfer power of this power supply has 40% port redundancy.
The product of embodiment 2 designs for network control electric locomotive uses, according to different communication of locomotive interface requirements, adopting corresponding communication protocol (as: MVB train multi-functional communications agreement) etc. to carry out software programming realizes digital signal and communicates by letter with locomotive network control system, as shown in Figure 5, this electronic type voltage transformer is taked the high Redundancy Design of two-way, in figure, C is primary electron formula voltage transformer, D is standby electronic type voltage transformer, by change over switch 11, switch, adopt high pressure divider resistance, photoelectricity isolation and signal condition, signal A/D conversion, network communication interface is partly realized circuit function.Each circuit module specific works is as follows:
Resistor voltage divider circuit: voltage grading resistor is mainly used in the net of locomotive input to compress into row step-down and sampling, the net that makes to input in locomotive presses signal by 25kVAC, to be converted to the low-voltage signal of 0-5VAC, at low-voltage output, increase overvoltage absorbing circuit as overvoltage protection, prevent that net side instantaneous pressure string is as low tension loop, thereby the circuit of protection low-pressure end, the signal output of low-pressure end 0-5VAC adopts the aviation plug of IP67 degree of protection, can effectively bear locomotive vibration, sleet corrodes, 5 meters of 0-5VAC signal output distances, meet net and press the required distance of signal leading locomotive inside, voltage divider precision reaches leads 0.2 grade, other technologies index meets GB/T20840.7-2006 and bar 3, bar 4 standards,
High-pressure side photoelectricity isolation processing element circuit: the net of the 0-5VAC exporting from voltage grading resistor is pressed signal, first pass through the isolation of linear photoconductor, isolation voltage grade is 2500VAC, 1min, make the high pressure isolation of other circuit of subsequent conditioning circuit and locomotive and electrical network, it is the power supply changeover device of 2500VAC, 1min that linear photoelectric isolation front end adopts isolation voltage grade, linear photoelectric isolation makes the net of 0-4VAC press signal after photoelectricity isolation conversion, to become equally the isolation signals of 0-4VAC, for the signal condition of rear class, linear photoelectric isolation conversion accuracy is 0.2 grade;
Low pressure amplifying circuit: signal conditioning circuit is mainly used in the shaping to photoelectricity isolation signals feeds back the forward output of linear optical coupling simultaneously, makes the conversion accuracy of linear optical coupling reach designing requirement;
A/D change-over circuit device: the net pressure signal after signal condition is that the AC signal of 0-5V turns, to press signal by Internet Transmission net, must press signal to convert digital signal on the net of simulation, adopt high-precision A/D change-over circuit, the AC signal of simulation be converted to the effective value signal of digital quantity;
Controller: this controller is to adopt single-chip microcomputer, digital signal after A/D conversion is read from A/D conversion chip, accept after the reading command of locomotive network controller simultaneously, press digital quantity signal to send locomotive control to by network on the net of measuring, for locomotive control;
RS485 communication interface: for transmission of digital signals and isolate the impact of electric locomotive control system, digital signal outputs to new network controller car team car intelligent network CMT input, in this example, locomotive adopts MVB communication protocol to control;
Insulating power supply: described high-pressure side photoelectricity isolation processing element circuit, low pressure amplifying circuit and network signal modular converter are by independently insulating power supply power supply, described independently insulating power supply has respectively redundancy output, and meet locomotive vibration and temperature requirement, they are respectively:
1, be the insulating power supply of DC110V change DC5V, the DC ± 15V of low pressure amplifying circuit and A/D conversion, controller and communication interface power supply, power output is 30W, and the transfer power of this insulating power supply has 50% port redundancy.
2, be the withstand voltage insulating power supply of height of high-pressure side photoelectricity isolation processing element circuit front end power supply, the isolation voltage of this power supply is that AC1500V exchanges, and power output is 2W.
3, the insulating power supply that becomes DC5V for the DC5V of communication interface terminal circuit power supply, power output is 2W, the transfer power of this insulating power supply has 40% port redundancy.
Above-described embodiment and execution mode are only the preferred embodiments of the present invention and execution mode; only for the present invention is further elaborated; protection scope of the present invention is not imposed any restrictions; those of ordinary skills are not departing from layout novelty and creationary distortion and the retouching of doing under essence of the present invention and technology enlightenment; all should be considered as within protection scope of the present invention, protection scope of the present invention is specifically depending on its claims.
Claims (8)
1. a use for electric locomotive electronic mutual inductor, is characterized in that, comprising:
Bleeder circuit, described bleeder circuit is electric resistance partial pressure type structure, choosing of divider resistance select can resist in the resistance that impacts of low-order harmonic, bleeder circuit carries out dividing potential drop sampling to the high voltage of electrical network;
Overvoltage crowbar, input connects the output of described voltage divider, and output ground connection, for whole instrument transformer provides overvoltage protection;
High-pressure side photoelectricity isolation processing element circuit, input connects described bleeder circuit, output connects low pressure amplifier circuit, high-pressure side photoelectricity isolation processing element circuit passes through electricity/optical coupler dividing potential drop sampled signal, take light as medium, transmission of electric signals is converted to light signal, again light signal is converted to the signal of telecommunication and passes in subsequent conditioning circuit, subsequent conditioning circuit is reached to insulation blocking effect;
Low pressure amplifying circuit, input connects described high-pressure side photoelectricity isolation processing element circuit, output junctor vehicle device, low pressure amplifying circuit is that the low-voltage ac signal that high-pressure side photoelectricity isolation processing element circuit is sent is nursed one's health, and output voltage is directly for locomotive microcomputer control cabinet and other equipment.
2. a kind of use for electric locomotive electronic mutual inductor according to claim 1, it is characterized in that, also comprise power amplification circuit, described power amplification circuit input connects described low pressure amplifying circuit, output junctor vehicle device, power amplification circuit carries out multistage AC power amplification low-voltage ac signal, and the conditioning of boosting, and transfers out the AC analogue signal that voltage level is larger.
3. a kind of use for electric locomotive electronic mutual inductor according to claim 2, is characterized in that, when described power amplification circuit exports electric locomotive to, is to isolate feedback output by transformer, and the output of transformer feeds back to the drive end of transformer.
4. according to a kind of use for electric locomotive electronic mutual inductor described in claim 1 or 2, it is characterized in that, further, described electronic type voltage transformer also comprises digital signal processing circuit, digital signal processing circuit input connects low pressure amplifying circuit, output junctor vehicle device, digital signal processing circuit is converted to digital signal the low-voltage ac signal of low pressure amplifying circuit output and exports by RS485 interface requirement, for locomotive.
5. a kind of use for electric locomotive electronic mutual inductor according to claim 4, it is characterized in that, described digital signal processing circuit comprises A/D converter, controller and RS485 network interface, three connects successively, it is the AC signal of 0-5V that net after signal condition is pressed signal, press signal by Internet Transmission net, must press signal to convert digital signal on the net of simulation, adopt high-precision A/D converter, the AC signal of simulation is converted to the effective value network signal of digital quantity; Controller is for controlling communicating by letter between electronic type voltage transformer and electric locomotive control system, and RS485 network interface is for output network signal.
6. a kind of use for electric locomotive electronic mutual inductor according to claim 5, it is characterized in that, described high-pressure side photoelectricity isolation processing element circuit, low pressure amplifying circuit, power amplification circuit and digital signal processing circuit be by the power supply of insulating power supply independently, and described independently insulating power supply is all from locomotive DC110V power supply power taking and have respectively redundancy output.
7. a using method for use for electric locomotive electronic type voltage transformer, is characterized in that, comprising:
(1) this electronic type voltage transformer is applied in the existing not electric locomotive with network control system, using the output as electronic type voltage transformer of low pressure amplifying circuit and power amplification circuit, its external interface is identical with the external interface of existing electromagnetic potential transformer, by voltage divider, from high-voltage contact net power taking, by the output of signal amplification module, met the AC analogue signal of electric locomotive technical standard, replace original electromagnetic potential transformer;
(2) this electronic type voltage transformer is applied in new network control electric locomotive, using the output of digital signal processing circuit as electronic type voltage transformer, by RS485 interface, as external interface output digit signals, to new network, controlled the control network of electric locomotive, by voltage divider, from high-voltage contact net power taking, by network signal modular converter output network signal, to new network, controlled the network interface of electric locomotive, replace original electromagnetic potential transformer, by new network, control the control network of electric locomotive car load is controlled.
8. a kind of using method of use for electric locomotive electronic type voltage transformer according to claim 7, it is characterized in that, in every electric locomotive, be equipped with standby electronic type voltage transformer, this standby electronic type voltage transformer is in parallel with primary electron formula voltage transformer by change over switch, when primary electron formula voltage transformer breaks down, by change over switch, standby electronic type voltage transformer is devoted oneself to work, electric locomotive can normally be moved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310014819.9A CN103715909B (en) | 2013-01-16 | 2013-01-16 | A kind of electric locomotive electronic mutual inductor and using method thereof |
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| CN201310014819.9A CN103715909B (en) | 2013-01-16 | 2013-01-16 | A kind of electric locomotive electronic mutual inductor and using method thereof |
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| CN103715909A true CN103715909A (en) | 2014-04-09 |
| CN103715909B CN103715909B (en) | 2016-06-22 |
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| CN201310014819.9A Active CN103715909B (en) | 2013-01-16 | 2013-01-16 | A kind of electric locomotive electronic mutual inductor and using method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104890680A (en) * | 2015-06-17 | 2015-09-09 | 株洲中车轨道交通装备有限公司 | Grid switching method of control system for inner-city rapid rail vehicles and control system |
| CN105510680A (en) * | 2016-01-27 | 2016-04-20 | 中车株洲电力机车有限公司 | Alternating current and direct current net voltage detection device |
| CN105629190A (en) * | 2016-01-27 | 2016-06-01 | 中车株洲电力机车有限公司 | AC/DC network voltage detection circuit |
| CN105759675A (en) * | 2014-12-19 | 2016-07-13 | 中车大连电力牵引研发中心有限公司 | Analog quantity input board card and analog quantity acquisition method |
| CN106660458A (en) * | 2014-08-04 | 2017-05-10 | 罗伯特·博世有限公司 | Energy supply system for a motor vehicle with an electric or hybrid drive |
| CN107064605A (en) * | 2017-06-08 | 2017-08-18 | 广东志高暖通设备股份有限公司 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106660458A (en) * | 2014-08-04 | 2017-05-10 | 罗伯特·博世有限公司 | Energy supply system for a motor vehicle with an electric or hybrid drive |
| CN105759675A (en) * | 2014-12-19 | 2016-07-13 | 中车大连电力牵引研发中心有限公司 | Analog quantity input board card and analog quantity acquisition method |
| CN104890680A (en) * | 2015-06-17 | 2015-09-09 | 株洲中车轨道交通装备有限公司 | Grid switching method of control system for inner-city rapid rail vehicles and control system |
| CN104890680B (en) * | 2015-06-17 | 2017-06-06 | 株洲中车轨道交通装备有限公司 | A kind of fast rail vehicle control system net changing method of administrative region of a city and control system |
| CN105510680A (en) * | 2016-01-27 | 2016-04-20 | 中车株洲电力机车有限公司 | Alternating current and direct current net voltage detection device |
| CN105629190A (en) * | 2016-01-27 | 2016-06-01 | 中车株洲电力机车有限公司 | AC/DC network voltage detection circuit |
| CN105629190B (en) * | 2016-01-27 | 2019-01-15 | 中车株洲电力机车有限公司 | A kind of alternating current-direct current network pressure detection circuit |
| CN107064605A (en) * | 2017-06-08 | 2017-08-18 | 广东志高暖通设备股份有限公司 | A kind of voltage detecting circuit and air-conditioning system with buffer action |
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
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| CN103715909B (en) | 2016-06-22 |
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