CN102267366A - Auxiliary power unit for series hybrid power passenger car and control method - Google Patents
Auxiliary power unit for series hybrid power passenger car and control method Download PDFInfo
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- CN102267366A CN102267366A CN2011101304725A CN201110130472A CN102267366A CN 102267366 A CN102267366 A CN 102267366A CN 2011101304725 A CN2011101304725 A CN 2011101304725A CN 201110130472 A CN201110130472 A CN 201110130472A CN 102267366 A CN102267366 A CN 102267366A
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Abstract
The invention relates to an auxiliary power unit for a series hybrid power passenger car and a control method. The auxiliary power unit comprises a diesel motor, a permanent magnetic synchronous generator, a three-phase uncontrollable rectifier and an auxiliary power unit controller, wherein the auxiliary power unit controller comprises a feed forward controller and a PID (Proportional Integral Derivative) controller; an output end of the diesel motor is connected to the permanent magnetic synchronous generator; the output end of the permanent magnetic synchronous generator is connected to the three-phase uncontrollable rectifier; the output end of the three-phase uncontrollable rectifier is in parallel connection with a voltage sensor and is in serial connection with a current sensor; a target current is calculated on the basis of a direct current voltage acquired by the voltage sensor and a target power signal sent by a controller for the whole series hybrid power passenger car; the target current is inputted to the feed forward controller; a current error between an actual output current acquired by the current sensor and the target current is inputted to the PID controller; and the summation of an output value of the feed forward controller and an output value of the PID controller is taken as an oil spraying quantity and is inputted into the diesel motor. The auxiliary power unit provided by the invention can be widely applied to the series hybrid power passenger car.
Description
Technical field
The present invention relates to a kind of Auxiliary Power Unit and control method of passenger vehicle, particularly about a kind of Auxiliary Power Unit and control method of Series Hybrid Electric Bus.
Background technology
The power source of Series Hybrid Electric Bus is generally formed (as shown in Figure 1) by vehicle power generation system 11 and electrokinetic cell 12 two parts.Vehicle power generation system 11 is also referred to as Auxiliary Power Unit, and Auxiliary Power Unit is made of driving engine 13, electrical generator 14, rectifier 15, is used for giving traction electric machine 16 to power bus transmission of electric energy, and is electrokinetic cell 12 chargings.Auxiliary Power Unit can be widely used in the hybrid power passenger car, and its low cost, high efficiency and anti-emission carburetor are the total development tendencys of hybrid power passenger car, and the control of Auxiliary Power Unit itself also is one of difficult point problem of research all the time.At present in Series Hybrid Electric Bus, Auxiliary Power Unit mostly adopts the configuration of diesel motor+electric excitation generator+uncontrollable rectifier, but, therefore influenced the volume and the efficient of whole Auxiliary Power Unit because the power density and the efficient of electric excitation generator are lower.Auxiliary Power Unit also has the configuration of employing diesel motor+magneto alternator+PWM rectifier, decoupling zero by system, can control rotary speed of diesel engine, diesel motor torque and magneto alternator torque easily, make diesel motor be operated in high efficient area, can improve the efficient and the fuel economy of Auxiliary Power Unit to a great extent, but the PWM rectifier has but increased the cost of Auxiliary Power Unit.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide the Auxiliary Power Unit and the control method of the Series Hybrid Electric Bus that a kind of power density is big, efficient is high, cost is low.
For achieving the above object, the present invention takes following technical scheme: a kind of Auxiliary Power Unit of Series Hybrid Electric Bus, it is characterized in that: it comprises diesel motor, magneto alternator, uncontrollable rectifier of three-phase and Control of Auxiliary Power Unit device, described Control of Auxiliary Power Unit device comprises feedforward controller and PID controller; The mouth of described diesel motor connects described magneto alternator, the mouth of described magneto alternator connects the uncontrollable rectifier of described three-phase, the uncontrollable rectifier output end of described three-phase be connected in parallel a voltage sensor, a current sensor is connected in series; The target power signal that vdc that described voltage sensor is collected and hybrid power passenger car entire car controller send, import described feedforward controller by the target current that calculates, actual output current and the current error between the described target current that described current sensor collects are imported described PID controller, import described diesel motor as fuel charge after the output valve addition of the output valve of described feedforward controller and described PID controller.
Described diesel motor is a high pressure co-rail diesel engine.
Described magneto alternator is the efficient rare-earth magneto alternator.
The uncontrollable rectifier of described three-phase is made up of power diode.
The control method of above-mentioned Auxiliary Power Unit, may further comprise the steps: 1) the target power signal that will be sent by the hybrid power passenger car entire car controller calculates with d. c. voltage signal by the uncontrollable rectifier output end collection of three-phase, obtains the target current of Auxiliary Power Unit: the vdc of the uncontrollable rectifier output of target current=target power/three-phase; 2) target current that step 1) is obtained and carry out current error by the actual output current signal of the uncontrollable rectifier 3 mouth collections of three-phase and calculate: current error=target current-actual output current; 3) will be by step 2) the current error input PID controller asked for, the target current I input feedforward controller that will be obtained by step 1) utilizes the computing formula m that is preset in the feedforward controller
f=f (I) obtains the output valve m of feedforward controller
f4) with the output valve addition of the output valve of feedforward controller and PID controller fuel charge as diesel motor.
Described computing formula m
f=f (I) be Auxiliary Power Unit under the homeostasis condition, the diesel motor fuel charge that obtains by test and the relation of Auxiliary Power Unit outgoing current, and then to simulate with Auxiliary Power Unit target current I be independent variable are with diesel motor fuel charge m
fCorresponding relation for dependent variable.
The present invention is owing to take above technical scheme, it has the following advantages: 1, Auxiliary Power Unit of the present invention is owing to adopt the configuration of diesel motor+magneto alternator+uncontrollable rectifier, mouth at uncontrollable rectifier is provided with voltage sensor and current sensor simultaneously, therefore can give the Control of Auxiliary Power Unit device with the voltage and current signal feedback that obtains in real time, at any time the fuel charge of diesel motor is adjusted, made the power density of Auxiliary Power Unit of the present invention big, efficient is high, cost is low.2, control method of the present invention adopts with the single argument control method of diesel motor fuel charge as control variable, design feedforward+PID feedback control algorithm is regulated the horsepower output of Auxiliary Power Unit, has therefore guaranteed the dynamic characteristics of Auxiliary Power Unit power output effectively.The present invention can be widely used in the hybrid power passenger car.
Description of drawings
Fig. 1 is the composition form of general power source
Fig. 2 is a structural representation of the present invention
Fig. 3 is the control method schematic flow sheet of Auxiliary Power Unit of the present invention
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As Fig. 2, shown in Figure 3, Auxiliary Power Unit of the present invention comprises diesel motor 1, magneto alternator 2, uncontrollable rectifier 3 of three-phase and Control of Auxiliary Power Unit device 4.Control of Auxiliary Power Unit device 4 comprises feedforward controller 41 and PID controller 42.Diesel motor 1 mouth connects magneto alternator 2 by coupler 5, magneto alternator 2 mouths connect the uncontrollable rectifier 3 of three-phase by three cables 6, uncontrollable rectifier 3 mouths of three-phase be connected in parallel a voltage sensor 7, a current sensor 8 is connected in series, the other end of voltage sensor 7 connects ground wire, and current sensor 8 other ends connect electrokinetic cell 9 and traction electric machine.The target power signal that d. c. voltage signal that described voltage sensor 7 is collected and hybrid power passenger car entire car controller send, by the target current input feedforward controller 41 that calculates, in actual output current that current sensor 8 is collected and the input of the current error between the target current PID controller 42, import diesel motor 1 as fuel charge after the output valve addition with the output valve of feedforward controller 41 and PID controller 42.
In the foregoing description, diesel motor 1 of the present invention can adopt high pressure co-rail diesel engine (only as example, but be not limited thereto), diesel motor 1 fuel charge is used to control the horsepower output of diesel motor 1, and then realizes with the single argument control of diesel motor 1 fuel charge as the Control of Auxiliary Power Unit variable.Magneto alternator 2 of the present invention can adopt efficient rare-earth magneto alternator (only as example, but being not limited thereto).The uncontrollable rectifier 3 of three-phase can be made of (only as example, but being not limited thereto) power diode.
Auxiliary Power Unit of Series Hybrid Electric Bus control method of the present invention may further comprise the steps:
1) the target power signal that will be sent by the hybrid power passenger car entire car controller carries out computing with d. c. voltage signal by the uncontrollable rectifier 3 mouth collections of three-phase, obtains the target current of Auxiliary Power Unit:
The uncontrollable rectifier output dc voltage of target current=target power/three-phase;
2) target current that will be obtained by step 1) carries out error with actual output current signal by the uncontrollable rectifier 3 mouth collections of three-phase and asks for:
Current error=target current-actual output current;
3) will send into feedforward controller 41 by the target current that step 1) obtains, utilize the computing formula m that is preset in the feedforward controller 41
f=f (I) obtains the output valve of feedforward controller, and wherein I is the target current value in a certain moment, m
fIt is cooresponding oil spout value under this target current I; Simultaneously will be by step 2) the current error input PID controller 42 asked for, obtain PID controller 42 output valves, this numerical value is a compensation oil spout value at current error;
4), determine the fuel charge of diesel motor 1 jointly with the output valve of feedforward controller 41 and the output valve addition of PID controller 42.
Above-mentioned steps 3) in, computing formula m
f=f (I) be Auxiliary Power Unit under the homeostasis condition, the diesel motor fuel charge that obtains by test and the relation of Auxiliary Power Unit outgoing current are independent variable thereby simulate with Auxiliary Power Unit target current I, with diesel motor fuel charge m
fEquation m for dependent variable
f=f (I).This equation is preset in the feedforward controller 41 as the feedforward controller algorithm, in the dynamic duty of Auxiliary Power Unit, this feedforward controller 41 with the Auxiliary Power Unit target current as input, with the feed forward control amount of feedforward controller output valve as the diesel motor fuel charge, utilize feed forward control to solve non-linear coupled problem in the dynamic process, accelerate the rate of following of target instruction target word, utilize the PID controlled reset to eliminate the steady track error.
Aforementioned calculation formula m
f=f (I) is based on following principle: the net output of establishing driving engine is:
In the formula, P
eBe effective power, η
EtBe the net effciency of fuel energy conversion, B is the complete machine specific consumption of fuel, H
uBe lower calorific value of fuel; When engine operation in steady-state process, η
Et, H
uConstant, then the driving engine net output only has relation with the complete machine specific consumption of fuel;
And complete machine specific consumption of fuel B is meant total fuel mass that the unit time driving engine consumes:
In the formula, i is a number of cylinders, and n is a rotating speed, g
bBe the every circulating fuel consumption of single cylinder, τ is a stroke coefficient, after driving engine is determined, number of cylinders i, stroke coefficient τ promptly determine, when the Auxiliary Power Unit mouth connects high capacity cell, promptly approximate when constant when the Auxiliary Power Unit output voltage, engine speed n is approximate constant, therefore total fuel mass B only with circulating fuel consumption g
bRelation is arranged, promptly only relevant with Engine Injection Mass.
The various embodiments described above only are used to illustrate the present invention; wherein the structure of each parts, connection mode and control step etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement all should not got rid of outside protection scope of the present invention.
Claims (7)
1. the Auxiliary Power Unit of a Series Hybrid Electric Bus, it is characterized in that: it comprises diesel motor, magneto alternator, uncontrollable rectifier of three-phase and Control of Auxiliary Power Unit device, described Control of Auxiliary Power Unit device comprises feedforward controller and PID controller; The mouth of described diesel motor connects described magneto alternator, the mouth of described magneto alternator connects the uncontrollable rectifier of described three-phase, the uncontrollable rectifier output end of described three-phase be connected in parallel a voltage sensor, a current sensor is connected in series; The target power signal that vdc that described voltage sensor is collected and hybrid power passenger car entire car controller send, import described feedforward controller by the target current that calculates, actual output current and the current error between the described target current that described current sensor collects are imported described PID controller, import described diesel motor as fuel charge after the output valve addition with the output valve of described feedforward controller and described PID controller.
2. the Auxiliary Power Unit of a kind of Series Hybrid Electric Bus as claimed in claim 1, it is characterized in that: described diesel motor is a high pressure co-rail diesel engine.
3. the Auxiliary Power Unit of a kind of Series Hybrid Electric Bus as claimed in claim 1, it is characterized in that: described magneto alternator is the efficient rare-earth magneto alternator.
4. the Auxiliary Power Unit of a kind of Series Hybrid Electric Bus as claimed in claim 2, it is characterized in that: described magneto alternator is the efficient rare-earth magneto alternator.
5. as the Auxiliary Power Unit of claim 1 or 2 or 3 or 4 described a kind of Series Hybrid Electric Bus, it is characterized in that: the uncontrollable rectifier of described three-phase is made up of power diode.
As claim 1~5 each described as described in the control method of Auxiliary Power Unit, may further comprise the steps:
1) the target power signal that will be sent by the hybrid power passenger car entire car controller calculates with d. c. voltage signal by the uncontrollable rectifier output end collection of three-phase, obtains the target current of Auxiliary Power Unit:
The vdc of the uncontrollable rectifier output of target current=target power/three-phase;
2) target current that step 1) is obtained and carry out current error by the actual output current signal of the uncontrollable rectifier output end collection of three-phase and calculate:
Current error=target current-actual output current;
3) will be by step 2) the current error input PID controller asked for, the target current input feedforward controller that will be obtained by step 1) utilizes the computing formula m that is preset in the feedforward controller
f=f (I) obtains the output valve m of feedforward controller
f
4) with the output valve addition of the output valve of feedforward controller and PID controller fuel charge as diesel motor.
7. the control method of the Auxiliary Power Unit of a kind of Series Hybrid Electric Bus as claimed in claim 6 is characterized in that: described computing formula m
f=f (I) be Auxiliary Power Unit under the homeostasis condition, the diesel motor fuel charge that obtains by test and the relation of Auxiliary Power Unit outgoing current, and then to simulate with Auxiliary Power Unit target current I be independent variable are with diesel motor fuel charge m
fCorresponding relation for dependent variable.
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CN102926812A (en) * | 2012-10-24 | 2013-02-13 | 江苏大学 | Rotational speed control method for pilot injection type numerical control air-powered engine |
CN103732432A (en) * | 2012-03-28 | 2014-04-16 | 株式会社久保田 | Hybrid working vehicle |
CN104210486A (en) * | 2014-08-13 | 2014-12-17 | 潍柴动力股份有限公司 | Electric energy control method and electric energy control system for hybrid power engineering machinery vehicle |
CN105422550A (en) * | 2015-12-09 | 2016-03-23 | 西安建筑科技大学 | Composite compensation control system and method of variable-rotation-speed hydraulic power source |
CN106089464A (en) * | 2016-08-16 | 2016-11-09 | 株洲中车时代电气股份有限公司 | A kind of diesel engine output power control method and device |
CN112859582A (en) * | 2021-01-07 | 2021-05-28 | 平阳星嘉智能科技有限公司 | Incremental PID controller in motor control |
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CN104210486A (en) * | 2014-08-13 | 2014-12-17 | 潍柴动力股份有限公司 | Electric energy control method and electric energy control system for hybrid power engineering machinery vehicle |
CN104210486B (en) * | 2014-08-13 | 2017-01-11 | 潍柴动力股份有限公司 | Electric energy control method and electric energy control system for hybrid power engineering machinery vehicle |
CN105422550A (en) * | 2015-12-09 | 2016-03-23 | 西安建筑科技大学 | Composite compensation control system and method of variable-rotation-speed hydraulic power source |
CN106089464A (en) * | 2016-08-16 | 2016-11-09 | 株洲中车时代电气股份有限公司 | A kind of diesel engine output power control method and device |
CN106089464B (en) * | 2016-08-16 | 2019-04-05 | 株洲中车时代电气股份有限公司 | A kind of diesel engine output power control method and device |
CN112859582A (en) * | 2021-01-07 | 2021-05-28 | 平阳星嘉智能科技有限公司 | Incremental PID controller in motor control |
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