CN202080279U - Electrical transmission system for double-power source diesel locomotive - Google Patents
Electrical transmission system for double-power source diesel locomotive Download PDFInfo
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- CN202080279U CN202080279U CN2011201852299U CN201120185229U CN202080279U CN 202080279 U CN202080279 U CN 202080279U CN 2011201852299 U CN2011201852299 U CN 2011201852299U CN 201120185229 U CN201120185229 U CN 201120185229U CN 202080279 U CN202080279 U CN 202080279U
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Abstract
The utility model discloses an electrical transmission system for a double-power source diesel locomotive. Double power sources are respectively of a diesel engine generating set and an energy storage power source, and the system comprises a main generator circuit, an energy storage power source circuit, an intermediate direct current circuit, an inverter and a control device, wherein the intermediate direct current circuit is coupled with the main generator circuit and the energy storage power source circuit respectively, and the inverter is coupled with the intermediate direct current circuit; and the control device controls the diesel engine generating set and/or the energy storage power source to work according to external control information, feedback information of the locomotive and feedback detection signals of the intermediate direct current circuit, and sends an inversion control command to the inverter. The electrical transmission system for the double-power source diesel locomotive is capable of effectively solving the problems of energy waste of an electrical transmission diesel locomotive, and low running power playing efficiency of a diesel engine in the prior art.
Description
Technical field
The utility model relates to locomotive drive technology field, particularly a kind of dual power source diesel locomotive electric drive system.
Background technology
The traditional combustion engine car is a fuel with diesel oil (also claiming fuel oil), is single power source with the diesel engine, realizes the traction of locomotive by hydraulic transmission or electric tramsmission mode:
Hydraulic drive locomotive is mainly by hydraulic transmission gear box, axle gear box, and compositions such as versatile spindle, hydraulic torque converter (claiming tor-con again) is the most important driver element of hydraulic drive locomotive, is made up of pump impeller, turbine, track adjusting wheel.Pump impeller links to each other with crankshaft of diesel engine, pump impeller blade drives power fluid makes it obtain energy, and in the turbine blade runner, flow energy is passed to turbine blade, by the acting of turbine output mechanical wheel, diesel engine power is passed to the locomotive driving wheel by versatile spindle, axle gear box; Power fluid through the guiding of guide wheel impeller, returns pump impeller after flowing out from turbine blade again.
Diesel-electric locomotive generally is divided into two kinds: a kind of is " handing over straight " transmission locomotive, be that diesel engine drives three-phase synchronous AC pulling electric generator, the three plase alternating current that sends becomes direct current (DC) by rectification, and DC motor is respectively drawn in the direct supply of direct current (DC), drives the locomotive driving wheel.Another kind is " friendship orthogonal " transmission locomotive, be that diesel engine drives three-phase synchronous AC pulling electric generator, the three plase alternating current that sends arrives the intermediate dc link by rectification, intermediate dc link constant DC is pressed by the inverter frequency modulation and voltage modulation, inversion is a three plase alternating current, supply with phase asynchronous traction motor, drive the locomotive driving wheel.
There is following shortcoming at least in present diesel locomotive:
(1) in the rheostatic brake operating mode, traction electric machine is in generating state, and the electric energy that sends generally consumes on braking resistor, is dissipated in the atmosphere by special fan in the mode of heat energy, causes the waste of the energy.
(2) in theory, when turning round under the high-speed standard duty of diesel engine, fuel consumption rate is lower, and the horsepower output of diesel engine is bigger, the locomotive operation good economy performance.But owing to influenced and the scope of diesel engine speed and restriction of lifting degree of hastening or the like by the load of locomotive operation in the actual moving process, diesel engine of diesel locomotive situation greatly all is operated in the lower low efficiency district of rotating speed, the fuel oil integral combustion is insufficient, the engine fuel economy benefit is on the low side, especially shunting diesel locomotive, along with load variations, operating mode switch frequent, show more obvious.And, no matter be hydraulic drive locomotive or electric driving vehicle, the mono-diesel engine provides power, make the diesel engine power design must satisfy and surpass the maximum tractive output requirement of locomotive requirement, and in most cases, locomotive is not to draw with maximum tractive output, and the diesel engine power performance is unsaturated, efficient is low.
At above-mentioned this situation, begun at present to develop the dual power source diesel locomotive energetically, and, how to have realized its electric drive system at this dual power source, prior art does not also have the actv. solution.
The utility model content
The utility model embodiment provides a kind of dual power source diesel locomotive electric drive system, can cause energy dissipation, the inefficient problem of diesel engine power with the diesel-electric locomotive that solves prior art.
For this reason, the utility model embodiment provides following technical scheme: a kind of dual power source diesel locomotive electric drive system, and described dual power source is respectively diesel power generation unit and stored energy power source, and described system comprises:
The main generator circuit, stored energy power source circuit, the intermediate dc loop that couples with described main generator circuit and described stored energy power source circuit respectively, the inverter that couples with described intermediate dc loop, and control setup; Described control setup is controlled the work of described diesel power generation unit and/or described stored energy power source according to the detection signal of external control information, locomotive feedback information and described intermediate dc circuit feedback, and sends the inversion output command to described inverter.
Preferably, described main generator circuit comprises rectification unit, is used for the three plase alternating current of described diesel power generation unit input is rectified into direct current, and this direct current is outputed to described intermediate dc loop.
Alternatively, described stored energy power source circuit comprises gate-controlled switch or DC/DC changer, is used for control according to described control setup and described stored energy power source is connected with described intermediate dc loop or disconnects.
Preferably, described intermediate dc loop comprises:
Measuring unit is used to measure the electric current of described main generator circuit output and the electric current of voltage and the output of described stored energy power source circuit, and result of a measurement is fed back to described control setup as detection signal;
Braking resistor is used for the electric energy that traction electric machine produces under damped condition is converted into heat energy.
Preferably, described inverter comprises:
Inversion unit is used for the inversion output command according to described control setup transmission, and the direct current (DC) with the input of described intermediate dc loop under traction working condition changes three-phase variable ratio frequency changer transformation alternating current into, to drag traction electric machine; The three plase alternating current of under damped condition described traction electric machine being exported changes direct current (DC) into and feeds back to described intermediate dc loop, so that the power supply of described stored energy power source is given by described stored energy power source circuit in described intermediate dc loop;
The copped wave unit is used for connecting described braking resistor when described inversion unit feeds back to the electrically-charged electric current in described stored energy power source above setting value, carries out the shunting of excess energy.
Preferably, described control setup is controlled described diesel power generation unit and is operated in rated speed of rotation and output rating by the rotating speed and the main generator excitation electric current of diesel engine in the described diesel power generation unit of control.
Preferably, described control setup comprises:
The rating horsepower calculating unit is used to calculate the output rating under the current working speed of diesel engine;
The Feedback of Power calculating unit is used to calculate the current real output of diesel engine;
The one PID regulon is used for the real output of the described diesel engine of closed loop adjustment;
The 2nd PID regulon is used for charging, the discharge current in closed loop adjustment stored energy power source;
Comparator, be used for adjusting output result and three signals of intermediate dc loop voltage restriction of the adjusting of described PID regulon output result, the 2nd PID regulon are carried out preferably, select output to satisfy three's minimum value simultaneously, so that the real output of described diesel engine is constant in the diesel engine rating horsepower, discharging and recharging of described stored energy power source do not overcharge, crosses and put the not overvoltage of intermediate dc loop voltage;
PWM copped wave output unit is used for the comparative result according to described comparator output, and the control main generator excitation is to control the real output of described diesel engine;
The auxiliary power evaluation unit is used for according to diesel engine speed, diesel engine information and external control information the power of locomotive ancillary system consumption being estimated;
The drag torque calculating unit, the difference that is used for the estimated power that the diesel engine output rating that obtains according to described rating horsepower calculating unit and described auxiliary power evaluation unit obtain, and locomotive speed, external control information, built-in locomotive tractive effort curve, calculate the locomotive drag torque;
The 3rd PID regulon is used under traction working condition described locomotive traction moment being carried out closed loop adjustment;
The first inversion control unit is used under traction working condition the adjusting result according to described the 3rd PID regulon, to the instruction of described inverter output inversion control.
Preferably, described Feedback of Power calculating unit, electric current and voltage that the main generator circuit that specifically is used for measuring according to described measuring unit is exported calculate the current real output of diesel engine.
Preferably, described control setup also comprises:
Specified braking force calculating unit is used to calculate the current specified braking force of traction electric machine;
The 4th PID regulon is used for that the actual braking force to described traction electric machine carries out closed loop adjustment under damped condition;
The second inversion control unit is used under damped condition exporting the inversion control instruction according to the adjusting result of described the 4th PID regulon;
Copped wave regulating control unit is used for will being sent to described braking resistor to the described stored energy power source unnecessary electric energy of charging under damped condition.
Preferably, described system also comprises:
Subordinate inverter, couple with described intermediate dc loop, the direct current (DC) that described intermediate dc loop is imported in the inversion control instruction that is used for sending according to described control setup changes three-phase variable ratio frequency changer transformation alternating current and direct current (DC) into, is the assistant load power supply of described diesel locomotive.The dual power source diesel locomotive electric drive system that the utility model embodiment provides under traction working condition, can make motor hand do at the rating horsepower high efficient area, the diesel-engine fuel sufficient combustion, and economical operation, and reduce dual fuel of diesel engine; Under damped condition, can reclaim the energy under the locomotive rheostatic brake operating mode, make the traction electric machine regenerating braking energy obtain storing and recycling.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the dual power source of the utility model embodiment dual power source diesel locomotive electric drive system and locomotive and the interface scheme drawing of traction electric machine and assistant load;
Fig. 2 is a kind of embodiment functional block diagram of the utility model dual power source diesel locomotive electric drive system;
Fig. 3 be the utility model dual power source diesel locomotive electric drive system another kind of embodiment functional block diagram;
Fig. 4 is a kind of concrete structure scheme drawing of the utility model dual power source diesel locomotive electric drive system;
Fig. 5 is the control principle scheme drawing of control setup under traction working condition in the utility model dual power source diesel locomotive electric drive system;
Fig. 6 is the control principle scheme drawing of control setup under damped condition in the utility model dual power source diesel locomotive electric drive system.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model dual power source diesel locomotive electric drive system is applied in the dual power source diesel locomotive, and the dual power source of itself and locomotive and the interface of traction electric machine and assistant load are as shown in Figure 1.
Among Fig. 1, the utility model dual power source diesel locomotive electric drive system 100 receives two propulsions source: the one, and diesel engine 111 drags main generator 112, by the control setup in the electric drive system 100 (not shown) control main generator 112 exciting currents, the controlled three plase alternating current of main generator 112 outputs is input to electric drive system 100; Another be stored energy power source 121 such as battery pack, output DC inputs to electric drive system 100 intermediate dc links.
The utility model dual power source diesel locomotive electric drive system can make locomotive work at different conditions according to external control information and locomotive feedback information, mainly contains following several state:
(1) accepts diesel engine and power supply is united in the stored energy power source, realize locomotive traction is finished in traction electric machine (can also comprise vehicle assistant load) power supply;
(2) accept the diesel engine power supply separately, realize locomotive traction is finished in traction electric machine (can also comprise vehicle assistant load) power supply;
(3) accept the power supply of stored energy power source separately, realize locomotive traction is finished in traction electric machine (can also comprise vehicle assistant load) power supply;
(4) under the rheostatic brake operating mode, finish locomotive brake force control, reclaim the traction electric machine regenerating braking energy simultaneously, be stored in the stored energy power source.
As shown in Figure 2, be the structural representation of the utility model dual power source diesel locomotive electric drive system.
In this embodiment, dual power source diesel locomotive electric drive system 200 is applied in the dual power source diesel locomotive, and as previously described, above-mentioned dual power source can be respectively diesel power generation unit and stored energy power source, wherein, the stored energy power source can be battery pack or super capacitor etc.
This electric drive system comprises: main generator circuit 201, stored energy power source circuit 202, the intermediate dc loop 203 that couples with above-mentioned main generator circuit 201 and stored energy power source circuit 202 respectively, the inverter 204 that couples with above-mentioned intermediate dc loop 203, and control setup 205.
The utility model dual power source diesel locomotive electric drive system adopts " friendship orthogonal " mode of electric tramsmission, by the detection signal of above-mentioned control setup 205 according to external control information, locomotive feedback information and above-mentioned intermediate dc loop 203 feedbacks, control the work of described diesel power generation unit and/or described stored energy power source, and send the inversion control instruction to above-mentioned inverter 204.Particularly, above-mentioned control setup 205 is by the rotating speed and the main generator excitation electric current of diesel engine in the described diesel power generation unit of control, control the power of described diesel power generation unit output, for fully improving the efficient of diesel engine, control described diesel power generation unit and be generally operational in rated speed of rotation and output rating.
A kind of concrete structure in above-mentioned intermediate dc loop 203 can comprise: measuring unit and braking resistor (not shown), wherein, described measuring unit is used to measure the electric current of above-mentioned main generator circuit 201 outputs and the electric current of voltage and 202 outputs of above-mentioned stored energy power source circuit, and result of a measurement is fed back to above-mentioned control setup 205 as detection signal.Described braking resistor is used for the electric energy that traction electric machine produces under damped condition is converted into heat energy.
A kind of concrete structure of above-mentioned inverter can comprise: inversion unit and copped wave unit (not shown), wherein, the inversion control instruction that described inversion unit sends according to above-mentioned control setup 205, direct current (DC) with 203 inputs of above-mentioned intermediate dc loop under traction working condition changes three-phase variable ratio frequency changer transformation alternating current into, to drag traction electric machine; The three plase alternating current of under damped condition described traction electric machine being exported changes direct current (DC) into and feeds back to above-mentioned intermediate dc loop 203, so that the power supply of described stored energy power source is given by above-mentioned stored energy power source circuit 202 in above-mentioned intermediate dc loop 203.Described copped wave unit is used for when described inversion unit feeds back to the electrically-charged electric current in described stored energy power source above setting value by above-mentioned intermediate dc loop 203, by triggering the logical described braking resistor of described copped wave unit switch break-over of device corner connection, carry out the shunting of excess energy, satisfying the electrically-charged while of described stored energy power source, unnecessary braking energy consumes by the mode of described braking resistor with heat energy.
As shown in Figure 3, in another embodiment of the present utility model, described electric drive system also can further comprise subordinate inverter 206, couple with intermediate dc loop 203, the direct current (DC) that intermediate dc loop 203 is imported in the inversion control instruction that is used for sending according to control setup 205 changes three-phase variable ratio frequency changer transformation alternating current and direct current (DC) into, is the assistant load power supply of described diesel locomotive.
Vdc in the conventional AC transmission locomotive intermediate dc loop is according to the linear rising of diesel engine speed, because the vdc amplitude variation range in the intermediate dc loop wide (not waiting to last kilovolt) from several hectovolts, and the factors such as high order harmonic influence of traction electric machine, make that subordinate inverter can not be directly from middle DC loop power taking, special pilot alternator need be set, by small-sized " friendship orthogonal " conversion, satisfy the power of helper motor even load, voltage, frequency requirement, by " handing over straight " conversion, satisfy the DC load requirement.
And in the utility model dual power source diesel locomotive electric drive system, clamped down at the voltage stabilization of described stored energy power source circuit 202, subordinate inverter 206 can be from the direct power taking in intermediate dc loop of native system, devices such as pilot alternator, rectification have been saved, the minimizing of process link makes that reliability and economy are all promoted.
In Fig. 3, described subordinate inverter 206 is output as example with one tunnel interchange and one road direct current to be illustrated, in actual applications, can arrange interchange or the direct current output that the different voltage classs of multichannel, different frequency require according to the quantity of load.
The utility model dual power source diesel locomotive electric drive system under damped condition, can reclaim braking energy, and be stored by stored energy power source such as battery pack, super capacitor etc.Complementation by dual power source, can utilize the less diesel engine of output rating, make it always work in efficient district, under the little condition of loading of locomotive, the regenerated energy that utilizes traction electric machine to produce charges to the stored energy power source, and under locomotive heavy load situation, the energy of diesel engine hypotraction is replenished by the stored energy power source, thereby greatly improve the power efficiency of diesel engine, and reach effects of energy saving and emission reduction.
As shown in Figure 4, be a kind of concrete structure scheme drawing of the utility model dual power source diesel locomotive electric drive system.
In this embodiment, the main generator circuit of dual power source diesel locomotive electric drive system 300 mainly comprises rectification unit 301; The stored energy power source circuit mainly comprises gate-controlled switch 302; The intermediate dc loop mainly comprises: measuring unit (comprise and be not limited to I1, I2, I3, V1 among Fig. 4), braking resistor (comprising BR1, BR2, BR3, BR4, BR5, BR6 among Fig. 3) also can further comprise: discharging resistance (comprising R1, R2 among Fig. 3), earth protective device 303, filter capacitor C1; Inverter has 6, as the inverter among Fig. 41, inverter 2, inverter 3, inverter 4, inverter 5 and inverter 6, each inverter comprises inversion unit and copped wave unit respectively, drag different traction electric machines under the locomotive traction operating mode, pulling motor braking power control under the damped condition, and control unnecessary energy and consume in the heat energy mode).
In actual applications, above-mentioned subordinate inverter 306 can be integrated into an inversion unit 316 with above-mentioned 6 inverters, promptly be designed to major-minor incorporate structure, to the unified inversion control instruction of inversion unit 316 outputs, subordinate inverter 306 and above-mentioned 6 inverters carry out corresponding action according to this inversion control instruction respectively by control setup 305.Certainly, above-mentioned subordinate inverter 306 and above-mentioned 6 inverters also can be designed as a plurality of independently inversion units.
Above-mentioned rectification unit 301 is used for the three plase alternating current of described diesel power generation unit input is rectified into direct current, and this direct current is outputed to described intermediate dc loop.
Above-mentioned gate-controlled switch 302 is used for control according to control setup 305 to be made described stored energy power source be connected with described intermediate dc loop or disconnects.
I1 in the above-mentioned measuring unit, I2, I3 are respectively applied for the electric current that detects above-mentioned rectification unit 301, described stored energy power source and subordinate inverter 306 outputs, and give control setup 305 with measurement feedback; V1 is used to detect the voltage in intermediate dc loop, and gives control setup 305 with measurement feedback.
The fixedly discharge in above-mentioned discharging resistance R1, R2 intermediate dc loop under being used for locomotive unloading operating mode, the ground connection that is used from the main generator circuit with described earth protective device 303 1 is detected and protection.When middle DC loop bus negative or positive electrode ground connection, earth protective device 303 detects the unbalance of R1, R2 neutral point voltage, carries out the self-protection of circuit by the mode of cutting off the electricity supply.
Intermediate dc loop high-order harmonic filtering when above-mentioned filter capacitor C1 is used for the power supply of independent diesel engine and the energy storage effect of intermediate loop.
Above-mentioned each inverter is made up of inversion unit and copped wave unit, and wherein, described inversion unit can be made up of 6 IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), and described copped wave unit can be made up of 2 IGBT.Under the traction working condition, described inversion unit changes the direct current (DC) of intermediate dc loop input into three-phase variable ratio frequency changer transformation alternating current, drags traction electric machine, finishes locomotive characteristic control; Damped condition, described inversion unit changes the three plase alternating current of traction electric machine output into direct current (DC), feed back to the intermediate dc loop, charge for the stored energy power source, charging rest parts energy consumes in atmosphere in the mode of heat energy by described copped wave unit and braking resistor BR1/BR2/BR3/BR4/BR5/BR6.
Need to prove, above-mentioned IGBT element also can be with other on-off elements such as GTO (Gate Turn-Off Thyristor, turn-off thyristor), IPM (Intelligent Power Module, Intelligent Power Module), IGCT (Intergrated Gate Commutated Thyristors, integrated gate commutated thyristor) etc. substitutes.Above-mentioned gate-controlled switch 302 also can adopt DC/DC converting means or other devices to realize.
Utilize electric drive system of the present utility model, can make diesel locomotive be operated in different conditions, mainly contain following several:
(1) control setup 305 control gate-controlled switches 302 closures are devoted oneself to work the stored energy power source, to electric drive system 300 power supplies; Simultaneously, control setup 305 control diesel power generation unit work, main generator is carried out accurate Generation Control, promptly unite by electric drive system 300 traction electric machine is powered by diesel power generation unit and stored energy power source, on-off element opens angle in the inversion unit in the control setup 305 accuracy control inverters, realization is accurately powered to traction electric machine, finishes locomotive traction.
This function ensures the power output and the efficiency comes first of diesel engine, diesel engine output rating horsepower is behind this part deduction locomotive auxiliary power, with locomotive speed, control command, according to the built-in given moment of tractive force curve negotiating inverter output traction electric machine, the output of control inverter.By the voltage up-down balance that the traction electric machine energy requirement reflects middle DC loop, unnecessary energy realizes that automatically to the charging of stored energy power source, not enough part is derived from moving replenishing by stored energy power.Also can realize accurate charging, discharge control by control setup 305 by the DC/DC device.
(2) control setup 305 control gate-controlled switches 302 disconnect, stopped power supply in the stored energy power source, simultaneously, control setup 305 control diesel power generation unit work, main generator is carried out accurate Generation Control, by the diesel power generation unit by electric drive system 300 separately to traction electric machine power supply, on-off element opens angle in the inversion unit in the control setup 305 accuracy control inverters, realization is accurately powered to traction electric machine, finishes locomotive traction.
(3) control setup 305 control gate-controlled switches 302 closures are devoted oneself to work the stored energy power source; Simultaneously, control setup 305 control diesel power generation units quit work, the main generator generation outage, promptly realize separately traction electric machine is powered by electric drive system 300 by the stored energy power source, on-off element opens angle in the inversion unit in the control setup 305 accuracy control inverters, realization is accurately powered to traction electric machine, finishes locomotive traction.
(4) under the rheostatic brake operating mode that locomotive requires, control setup 305 control gate-controlled switches 302 closures, on-off element opens angle in the inversion unit in the control setup 305 accuracy control inverters, the control locomotive brake force, traction electric machine is operated in generating state, is rectified into direct current by inversion unit, be back to the intermediate dc loop, charged in the stored energy power source, unnecessary energy is accurately regulated by the copped wave unit, consumes by the mode of braking resistor with heat energy.
Further combined with Fig. 5 and Fig. 6 the control process of control setup under different operating modes in the utility model dual power source diesel locomotive electric drive system is described below.
As shown in Figure 5, be the control principle scheme drawing of control setup under traction working condition in the utility model dual power source diesel locomotive electric drive system.
Under traction working condition, above-mentioned control setup is according to handle load condition (specifically can obtain according to handle gear of living in) control diesel engine speed.Particularly, detect the diesel engine actual speed, calculate the output rating that the current working speed of diesel engine can allow performance down according to the diesel engine power speed curves, as the diesel engine power given value by rating horsepower calculating unit 501; The rectification outgoing current I1 and the middle dc voltage V1 that are detected according to intermediate dc loop in the electric drive system by Feedback of Power calculating unit 502 calculate the current real output of diesel engine, as the diesel engine power value of feedback; Diesel engine power given value and value of feedback are carried out the residual quantity computing, by a PID (proportional-integral-differential) regulon 503 closed loop adjustment diesel engine powers, regulate result's input of device 505 as a comparison.In addition, by the charge/discharge current (value of feedback of allowing charge/discharge electricity electric current (given value) and reality thereof of the 2nd PID regulon 504 according to the stored energy power source, be the electric current I 2 of the stored energy power source circuit output that measures of above-mentioned measuring unit) charge/discharge current in stored energy power source is carried out closed loop adjustment, regulate result's input of device 505 as a comparison.
The output result of the PID closed loop adjustment of 505 pairs of above-mentioned PID regulons 503 of comparator and the 2nd PID regulon 504 compares, get smaller value wherein, (value of during super limits value two PID being got after little progressively reduces as limiting condition to adopt the intermediate dc loop voltage simultaneously, until being zero), the result is as control PWM (Pulse Width Modulation, pulse duration modulation) input value of copped wave output unit 506, that is to say, adjusting output result to an above-mentioned PID regulon 503, the adjusting output result of the 2nd PID regulon 504, and three signals of intermediate dc loop voltage restriction carry out preferably, select output to satisfy three's minimum value simultaneously, regulate main generator excitation and control the real output of diesel engine, make the real output of described diesel engine constant at the diesel engine rating horsepower, thereby make diesel engine be operated in efficient district as much as possible, unnecessary energy charges to the stored energy power source, not enough energy is replenished by the stored energy power source, simultaneously to the restriction adjusting of the charge/discharge current in stored energy power source and the restriction of middle dc voltage, ensure that the stored energy power source does not overcharge, cross and put, satisfy the charge/discharge current requirement in stored energy power source, also ensured the not overvoltage of intermediate dc loop voltage simultaneously.
Need to prove that above-mentioned diesel engine power speed curves is meant the corresponding curve of diesel engine speed and horsepower output, is that the model and the power of the diesel engine that uses with reality adapts, and production firm provides by diesel engine.
In addition, can also be by auxiliary power evaluation unit 507 according to diesel engine speed, diesel engine information is (such as the cooling fan in the locomotive feedback information, the traction electric machine ventilating set, the current transformer ventilating set, Air compressor, the main generator ventilating set, air-conditioning, information such as control electric consumption on lighting), and external control information (such as handle information), internal system subordinate inverter output information etc. is estimated the locomotive auxiliary power, the difference of the estimated power that diesel engine output rating that is obtained according to rating horsepower calculating unit 501 by drag torque calculating unit 508 and auxiliary power evaluation unit 507 obtain, and locomotive speed, external control information, built-in locomotive tractive effort curve etc., calculate locomotive traction moment, carry out closed loop adjustment by 509 pairs of these drag torques of the 3rd PID regulon, regulate the result and be input to the first inversion control unit 510, the inversion control instruction is exported in the first inversion control unit 510 under traction working condition, trigging pulse as the inversion unit on-off element, the angle of opening by trigging pulse is regulated (the i.e. output of the first inversion control unit 510 of traction electric machine drag torque, this output is as value of feedback), make it follow given value (being the output of drag torque calculating unit 508); In addition, the first inversion control unit 510 is a three phase variable frequency transformation source of AC with the direct supply inversion of intermediate dc loop also, powers to traction electric machine.
The orderly conducting of inverter switch element is the variable-frequency variable-voltage three plase alternating current with the dc inversion in intermediate dc loop, drives traction electric machine, by the driving cog wheel drive vehicle axis of a movable block.
As shown in Figure 6, be the control principle scheme drawing of control setup under damped condition in the utility model dual power source diesel locomotive electric drive system.
Under the rheostatic brake operating mode, inverter control traction electric machine is operated in generating state, and the recovery of pulling motor braking feedback energy is accepted in the stored energy power source.
At first, by the information of specified braking force calculating unit 601, calculate the rated value of current braking force according to the locomotive brake opisometer, as the given value of braking force according to current control handle; By the output torque of the second inversion control unit 603 as value of feedback.After given value and value of feedback are carried out residual quantity calculating, to the 4th PID regulon 602, actual braking force by 602 pairs of traction electric machines of the 4th PID regulon carries out closed loop adjustment, regulate the result and output to the second inversion control unit 603, the inversion control instruction is exported according to the adjusting result of the 4th PID regulon 602 in the second inversion control unit 603, trigging pulse as on-off element, make traction electric machine be in braking mode, the traction electric machine generating, the three plase alternating current that sends converts direct current to by the second inversion control unit 603, turn back to the intermediate dc loop, charged in stored energy power source 701, for ensureing that stored energy power source 701 does not overcharge, accurately to regulate by copped wave regulating control unit 604, the mode that unnecessary electric energy is regulated with heat energy by braking copped wave consumes on braking resistor 702.
By with adjusted, when damped condition ensures braking force, preferentially charged in stored energy power source 701, unnecessary energy consumes by the mode of braking resistor with heat energy.
As seen from the above description, the utility model dual power source diesel locomotive electric drive system under traction working condition, can make motor hand do at the rating horsepower high efficient area, the diesel-engine fuel sufficient combustion, and economical operation, and reduce dual fuel of diesel engine; Under damped condition, can reclaim the energy under the locomotive rheostatic brake operating mode, make the traction electric machine regenerating braking energy obtain storing and recycling.And, utilize battery pack or other closed-center systems, harmonic content reduces, and the energy totally cleans.
Need to prove that in actual applications, the control setup among the utility model embodiment can be realized by software and/or hardware.And, above-mentioned control setup embodiment only is schematic, wherein the unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, and, above-mentioned control setup can adopt centralized mode, also can adopt based on the distributed control mode of communication of locomotive network and realize.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
In addition, in this article, relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have the relation of any this reality or in proper order between these entities or the operation.
The above is preferred embodiment of the present utility model only, is not to be used to limit protection domain of the present utility model.All any modifications of within spirit of the present utility model and principle, being done, be equal to replacement, improvement etc., all be included in the protection domain of the present utility model.
Claims (10)
1. dual power source diesel locomotive electric drive system, described dual power source is respectively diesel power generation unit and stored energy power source, it is characterized in that, and described system comprises:
The main generator circuit, stored energy power source circuit, the intermediate dc loop that couples with described main generator circuit and described stored energy power source circuit respectively, the inverter that couples with described intermediate dc loop, and control setup; Described control setup is controlled the work of described diesel power generation unit and/or described stored energy power source according to the detection signal of external control information, locomotive feedback information and described intermediate dc circuit feedback, and sends the inversion output command to described inverter.
2. system according to claim 1 is characterized in that, described main generator circuit comprises rectification unit, is used for the three plase alternating current of described diesel power generation unit input is rectified into direct current, and this direct current is outputed to described intermediate dc loop.
3. system according to claim 1 is characterized in that, described stored energy power source circuit comprises gate-controlled switch or DC/DC changer, is used for control according to described control setup and described stored energy power source is connected with described intermediate dc loop or disconnects.
4. system according to claim 1 is characterized in that, described intermediate dc loop comprises:
Measuring unit is used to measure the electric current of described main generator circuit output and the electric current of voltage and the output of described stored energy power source circuit, and result of a measurement is fed back to described control setup as detection signal;
Braking resistor is used for the electric energy that traction electric machine produces under damped condition is converted into heat energy.
5. system according to claim 4 is characterized in that, described inverter comprises:
Inversion unit is used for the inversion output command according to described control setup transmission, and the direct current (DC) with the input of described intermediate dc loop under traction working condition changes three-phase variable ratio frequency changer transformation alternating current into, to drag traction electric machine; The three plase alternating current of under damped condition described traction electric machine being exported changes direct current (DC) into and feeds back to described intermediate dc loop, so that the power supply of described stored energy power source is given by described stored energy power source circuit in described intermediate dc loop;
The copped wave unit is used for connecting described braking resistor when described inversion unit feeds back to the electrically-charged electric current in described stored energy power source above setting value, carries out the shunting of excess energy.
6. system according to claim 5, it is characterized in that, described control setup is controlled described diesel power generation unit and is operated in rated speed of rotation and output rating by the rotating speed and the main generator excitation electric current of diesel engine in the described diesel power generation unit of control.
7. system according to claim 6 is characterized in that, described control setup comprises:
The rating horsepower calculating unit is used to calculate the output rating under the current working speed of diesel engine;
The Feedback of Power calculating unit is used to calculate the current real output of diesel engine;
The one PID regulon is used for the real output of the described diesel engine of closed loop adjustment;
The 2nd PID regulon is used for charging, the discharge current in closed loop adjustment stored energy power source;
Comparator, be used for adjusting output result and three signals of intermediate dc loop voltage restriction of the adjusting of described PID regulon output result, the 2nd PID regulon are carried out preferably, select output to satisfy three's minimum value simultaneously, so that the real output of described diesel engine is constant in the diesel engine rating horsepower, discharging and recharging of described stored energy power source do not overcharge, crosses and put the not overvoltage of intermediate dc loop voltage;
PWM copped wave output unit is used for the comparative result according to described comparator output, and the control main generator excitation is to control the real output of described diesel engine;
The auxiliary power evaluation unit is used for according to diesel engine speed, diesel engine information and external control information the power of locomotive ancillary system consumption being estimated;
The drag torque calculating unit, the difference that is used for the estimated power that the diesel engine output rating that obtains according to described rating horsepower calculating unit and described auxiliary power evaluation unit obtain, and locomotive speed, external control information, built-in locomotive tractive effort curve, calculate the locomotive drag torque;
The 3rd PID regulon is used under traction working condition described locomotive traction moment being carried out closed loop adjustment;
The first inversion control unit is used under traction working condition the adjusting result according to described the 3rd PID regulon, to the instruction of described inverter output inversion control.
8. system according to claim 7 is characterized in that,
Described Feedback of Power calculating unit, electric current and voltage that the main generator circuit that specifically is used for measuring according to described measuring unit is exported calculate the current real output of diesel engine.
9. system according to claim 7 is characterized in that, described control setup also comprises:
Specified braking force calculating unit is used to calculate the current specified braking force of traction electric machine;
The 4th PID regulon is used for that the actual braking force to described traction electric machine carries out closed loop adjustment under damped condition;
The second inversion control unit is used under damped condition exporting the inversion control instruction according to the adjusting result of described the 4th PID regulon;
Copped wave regulating control unit is used for will being sent to described braking resistor to the described stored energy power source unnecessary electric energy of charging under damped condition.
10. system according to claim 1 is characterized in that, described system also comprises:
Subordinate inverter, couple with described intermediate dc loop, the direct current (DC) that described intermediate dc loop is imported in the inversion control instruction that is used for sending according to described control setup changes three-phase variable ratio frequency changer transformation alternating current and direct current (DC) into, is the assistant load power supply of described diesel locomotive.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201852299U CN202080279U (en) | 2011-06-02 | 2011-06-02 | Electrical transmission system for double-power source diesel locomotive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201852299U CN202080279U (en) | 2011-06-02 | 2011-06-02 | Electrical transmission system for double-power source diesel locomotive |
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Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd. |
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