WO2014190842A1 - Machine de puissance hybride, système de puissance hybride et procédé de commande d'énergie pour ce dernier - Google Patents

Machine de puissance hybride, système de puissance hybride et procédé de commande d'énergie pour ce dernier Download PDF

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Publication number
WO2014190842A1
WO2014190842A1 PCT/CN2014/076831 CN2014076831W WO2014190842A1 WO 2014190842 A1 WO2014190842 A1 WO 2014190842A1 CN 2014076831 W CN2014076831 W CN 2014076831W WO 2014190842 A1 WO2014190842 A1 WO 2014190842A1
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Prior art keywords
motor generator
hybrid
soc value
load power
load
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PCT/CN2014/076831
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English (en)
Chinese (zh)
Inventor
杨国勋
董希文
刘华胜
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上海华兴数字科技有限公司
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Publication of WO2014190842A1 publication Critical patent/WO2014190842A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2091—Control of energy storage means for electrical energy, e.g. battery or capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • Hybrid Power Co. Hybrid Power System and Energy Control Method
  • a Chinese patent application filed on May 27, 2013, filed on the Chinese Patent Office, No. 201310202567.2, entitled “A Hybrid Power System Energy Control Method” Priority is hereby incorporated by reference in its entirety.
  • TECHNICAL FIELD The present invention relates to the field of mechanical control, and more particularly to a hybrid power system suitable for a hybrid power machine and an energy control method thereof. Background technique
  • the key to the hybrid machine is the hybrid drive system, which converts the chemical energy of the fuel into electric energy by the internal combustion engine, and then transfers the electric energy to the motor generator to drive the actuator such as the wheel.
  • the hybrid drive system may also include Power circuit systems, electronic management systems, and battery packs.
  • a hybrid machine can include an engine, an electric generator, and an actuator that are connected in series.
  • the super capacitor since the characteristics of the super capacitor itself and its application technology are relatively mature, it is often used as an energy storage unit in the hybrid power machine, and the super capacitor is connected to the electric generator by driving the inverter 104.
  • safety and fuel economy are critical. Therefore, the coordinated control of the state of charge (SOC) of the supercapacitor and the energy matching of the SOC and the load power is especially critical. .
  • SOC state of charge
  • the SOC value of the super capacitor is usually directly used as a control object, which is used to improve the control precision, avoid system instability caused by algorithm switching, has relatively high reliability, and has wide applicability.
  • the control methods in the prior art have the following problems:
  • the control target is only the SOC value, which will cause the engine to be turned off due to overload when the motor and the main pump are the same as the engine load.
  • the present invention provides a hybrid power system and an energy control method thereof, which can control the working state of the motor generator, prevent engine overload, and improve the fuel economy of the whole machine. Further, the present invention also proposes a hybrid machine provided with the hybrid system.
  • the present invention provides an energy control method for a hybrid power system, the energy control method comprising: collecting load information of a hybrid power system, and calculating load power and super capacitor of the hybrid power system according to the load information.
  • State of charge SOC
  • the controlling the actual working state of the motor generator to be in an optimal working state comprises: determining whether the actual working state of the motor generator is in an optimal working state, for example, the motor generator is already in an optimal state. In the working state, the load information of the hybrid system is re-collected in the set interval; if the motor generator is not in the optimal working state, the control command is generated according to the determined optimal working state of the motor generator, and the adjustment is made. The actual working state of the motor generator is in optimal working condition.
  • the load information of the acquisition hybrid system is periodically or in real time.
  • the method further includes: generating a control instruction table in advance according to a grading setting of the SOC value and the load power and an optimal working state of the motor generator corresponding to the two, and storing the control instruction table in the hybrid system; The SOC value and load power are matched with the control command list to determine the optimal operating state of the motor generator.
  • the present invention provides a hybrid power system including: an engine, a motor generator, a hydraulic pump, a super capacitor, a data sensor, and for controlling the electricity a control device for an operating state of the motor generator; wherein the engine is connected to the motor generator, the motor generator is connected to the hydraulic pump; and the motor generator is connected to the super capacitor through the control device
  • the data sensor is used to collect load information of the hybrid system.
  • the data sensor comprises: a voltage sensor connected to the super capacitor; and a current sensor and a pressure sensor connected to the hydraulic pump.
  • the above apparatus may further include: a trigger for triggering the voltage sensor, the current sensor and the pressure sensor to collect the load information periodically or in real time.
  • control device includes: a memory, configured to store a gradation in which an SOC value and a load power of the super capacitor are preset; a processor configured to calculate a load power and a super capacitor of the hybrid system The SOC value, and determine the calculated SOC value and the level of the load power and the optimal working state of the motor generator; the driving inverter is used to control the actual working state of the motor generator to be in an optimal working state.
  • the memory is further configured to: store a control instruction table pre-generated according to a gradation setting of the SOC value and the load power, and an optimum operating state of the motor generator corresponding to the two.
  • the present invention provides a hybrid power machine comprising the hybrid power system of any of the above, and an actuator; wherein the actuator is coupled to the hydraulic pump.
  • the above system further comprises: a rotary inverter, a rotary motor and a return mechanism connected in sequence, and the rotary inverter is connected to the super capacitor.
  • the actuator includes: a working device and a walking device. Compared with the prior art, the present invention has the following advantages:
  • FIG. 1 is a schematic diagram of a main structure of a hybrid power system according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of an energy control method according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an energy control process proposed by an embodiment of the present invention.
  • a hybrid power system having an energy control function includes: an engine 101, a motor generator 102, a hydraulic pump 103, a super capacitor 108, and a data sensor. And a control device for controlling the operating state of the motor generator 102.
  • the engine 101 is connected to the motor generator 102
  • the motor generator 102 is connected to the hydraulic pump 103
  • the motor generator 102 is connected to the super capacitor 108 via a control device.
  • the data sensor is used to collect load information of the hybrid system.
  • the hybrid system mainly includes: an engine 101 connected in sequence, a motor generator 102, a super capacitor 108, a control device (not shown), and a hydraulic pump 103.
  • the motor generator 102 is connected to the super capacitor 108 through a control device, and the control device provides a control command for driving the motor generator 102 to control the actual working state of the motor generator 102.
  • control device can control the actual working state of the motor generator 102 by controlling the speed or torque.
  • the motor generator 102 can be an induction motor or a synchronous motor.
  • the hybrid machine may be exemplified by a hybrid excavator. Therefore, the hybrid excavator is provided with the hybrid system and the actuator 112, and the actuator 112 may be included.
  • working devices boom, stick, bucket
  • running gear left walking, right walking
  • the hydraulic pump 103 is coaxially connected to the engine 101 and the motor generator 102.
  • the hydraulic pump 103 is connected to each of the working devices and the traveling device through pipes, and provides hydraulic power for working the working device and the traveling device.
  • control device is connected to the drive inverter 104, and the motor generator 102 is connected to the super capacitor 108 through the drive inverter 104, and the drive inverter 104 provides a control command for driving the motor generator 102 to operate.
  • the operating state of the motor generator 102 may include an electric state, a power generation state, and neither an electric state nor a power generation state.
  • the hybrid excavator may further include a swivel portion: a swivel inverter 105, a swing motor 106, and a swing mechanism 107.
  • the rotary inverter 105 provides a control command for the operation of the rotary motor 106.
  • the rotary motor 106 is mechanically coupled to the rotary mechanism 107, and the rotary motor 106 rotates the rotary mechanism 107 to rotate the upper platform of the hydraulic excavator.
  • the super capacitor 108 can provide energy for driving the inverter 104, the motor generator 102, the swing inverter 105, and the swing motor 106 to operate electrically. Further, the super capacitor 108 can accumulate electric energy generated by the motor generator 102 and the swing motor 106.
  • the data sensor may include: a voltage sensor 109, a proportional valve type current sensor 110, and a pressure sensor 111.
  • the voltage sensor 109 is connected to the super capacitor 108.
  • a proportional valve type current sensor 110 and a pressure sensor 111 are connected to the hydraulic pump 103.
  • a voltage sensor 109 is provided between the super capacitor 108 and the driving inverter 104 and the swinging inverter 105.
  • the hydraulic pump 103 is provided with a proportional valve current sensor 110 and a pressure sensor 111.
  • the hybrid system may further include: a trigger for periodically or real-time triggering the voltage sensor 109, the current sensor 110, and the pressure sensor 111 to collect load information.
  • control device may further include: a memory, a processor, and a driving inverter 104.
  • the memory is used to store the SOC value and load of the pre-set supercapacitor 108. The rating of the power.
  • the processor is used to calculate the load power of the hybrid system and the SOC operating state of the supercapacitor.
  • the drive inverter 104 is used to control the actual working state of the motor generator to be in an optimal working state.
  • the memory may be further configured to: store a pre-generated control instruction table according to a gradation setting of the SOC value and the load power, and an optimum operating state of the motor generator corresponding thereto.
  • a hybrid excavator is taken as an example, and the hybrid system includes: an engine 101, a motor generator 102, and a hydraulic pump 103.
  • the drive inverter 104, the swing inverter 105, the swing motor 106, the swing mechanism 107, the super capacitor 108, the voltage sensor 109, the proportional valve current sensor 110, the pressure sensor 111, the control device, and the actuator 112 are working devices ( Boom, stick, bucket) and walking gear (left walking, right walking).
  • the engine 101, the motor generator 102, and the hydraulic pump 103 are coaxially connected, and the swing motor 106 is mechanically coupled to the swing mechanism 107.
  • the hydraulic pump 103 is connected to each of the working devices and the traveling device through pipes to provide hydraulic power for the working device and the traveling device.
  • control device may be the drive inverter 104, or the drive inverter 104 may be provided with a controller to provide a control command for driving the motor generator 102 to operate.
  • control device can control the operating state of the motor generator 102 by controlling the speed or torque.
  • the swing inverter 105 provides control commands for the operation of the swing motor 106.
  • the slewing motor 106 drives the slewing mechanism 107 to rotate, thereby rotating the upper platform of the hydraulic excavator.
  • the supercapacitor 108 provides energy for driving the inverter 104, the motor generator 102, the swing inverter 105, and the swing motor 106 to operate electrically. At the same time, the electric energy generated by the motor generator 102 and the regenerative motor 106 is accumulated.
  • the driving inverter 104 controls the operation of the motor generator 102.
  • the state includes the electric state, the power generation state, and neither the electric nor the power generation state.
  • the present invention also provides a hybrid machine in which the hybrid system of any of the above and the actuator 112 are provided.
  • the actuator 112 is connected to the hydraulic pump 103.
  • the hybrid machine may further include: a rotary inverter 105, a rotary motor 106 and a swing mechanism 107 connected in series, and the swing inverter 105 is connected to the super capacitor 108.
  • Actuators include: Work equipment and walking gear.
  • the above embodiments directly control the operating state of the motor generator to effectively ensure that the SOC is always maintained within a reasonable range. Therefore, the above embodiments do not require DC/DC, which not only reduces the cost but also improves the reliability of the system. This is because the complexity of the system is increased due to the presence of DC/DC in the prior art, and the failure rate is increased. Accordingly, the hybrid system of the above embodiments does not need to adopt DC/DC, and thus can be improved. System reliability.
  • the above embodiments are capable of adapting the engine speed regulation characteristics because the engine and the motor are at the same speed, and it is not necessary to consider the engine speed.
  • the motor generator can be driven by adjusting the motor slip, so the present invention can be adaptive.
  • Engine speed In addition, it is precisely because the above embodiments can adapt the valve engine speed. Therefore, when the engine is fully functional for a long period of time, the implementation of the above embodiments is not affected, and the versatility of the system can be improved.
  • FIG. 2 there is shown an energy control method in a hybrid system proposed in the embodiment, the energy control method comprising the following steps:
  • S10 Start the hybrid machine and initialize the parameters.
  • S20 Collect the load information of the hybrid machine.
  • the load information may include information such as the bus voltage, the current and pressure of the hydraulic pump, and the like.
  • a data sensor is provided, which includes a voltage sensor 109, a current sensor 110, and a pressure sensor 111, which collect data information required for calculating load power.
  • the operation of collecting the load information may be performed periodically, or periodically, and may be performed in real time.
  • the load power of the hybrid machine and the SOC value of the super capacitor can be calculated.
  • S40 Determine the calculated SOC value and the level of the load power according to the preset SOC value of the super capacitor and the classification of the load power.
  • the SOC value of the super capacitor can be divided into the first, second and third levels.
  • the SOC value is in the first level of 0 ⁇ 30%; the SOC value is in the range of 30% ⁇ 60%.
  • the SOC value is at 60% ⁇ 1 and is classified as the third level.
  • the load power is divided into two levels, i.e., the first carrier level and the second carrier level, according to conventional or actual work objects and environments in the art.
  • the level of the SOC value, the level of the load power, and the corresponding working state of the motor generator 102 can be combined for different loads, SOC values, and corresponding fuel consumption conditions to obtain different loads and SOC values.
  • the optimal operating state of the corresponding motor generator 102 can be combined for different loads, SOC values, and corresponding fuel consumption conditions to obtain different loads and SOC values.
  • S50 Determine the optimal working state of the electric motor 102 according to the SOC value and the level of the load power and its matching condition.
  • the optimal working state of the motor generator 102 can be obtained by level matching the calculated SOC value and the load power.
  • the so-called level matching means According to the above The level division determines the calculated SOC value and the level at which the load power is located. After the levels of the two are determined, the levels of the two can be combined to determine the optimal working state of the motor generator 102 corresponding thereto.
  • the optimum operating state of motor generator 102 can be determined in accordance with a matched combination of SOC value and load power, which can be stored in the control device in the form of a control list.
  • the load power is at the first carrier level (the load power is large), based on the matching combination of the SOC value and the load power, it can be determined that the motor generator 102 should be in neither the electric nor the power generation state. At this time, the load power is all supplied by the engine 101.
  • the motor generator 102 should operate at a constant speed:
  • the motor generator 102 is in an electric state regardless of the load level at which the load is applied, that is, whether it is large or small.
  • S60 judging whether the motor generator 102 is in an optimal working state, if it is in an optimal working state, returning to S20, and re-collecting the load information of the hybrid power system within the set interval time, that is, when the set time arrives S20; if the actual working state of the motor generator 102 If the state is not the best working state, then S70 is executed.
  • control device After the control command is generated, the control device instructs the drive inverter 104 to perform corresponding zone shifting of the motor generator 102.
  • the energy control method may further include: pre-generating a control instruction table according to a grading setting of the SOC value and the load power and an optimal working state of the motor generator corresponding to the two, and storing the control instruction table in the hybrid system. . Then, the optimal operating state of the motor generator is determined by matching the calculated SOC value and the load power with the control command table.
  • the division of the SOC value can be divided according to the actual use situation.
  • the control method of the motor generator is not limited to the above embodiment.
  • the torque control mode can also be adopted, and the selection of the motor generator is not limited to the induction motor. Select the synchronous motor.
  • the above embodiment controls the SOC value and dynamically calculates the load power in real time, and determines the optimal working state of the motor generator according to the combined matching relationship between the SOC value and the load power, thereby controlling the actual working state of the motor generator.
  • the above embodiment controls the SOC value and dynamically calculates the load power in real time, and determines the optimal working state of the motor generator according to the combined matching relationship between the SOC value and the load power, thereby controlling the actual working state of the motor generator.
  • it is also able to adapt to the engine speed regulation characteristics and improve system versatility.
  • Step 1 start the excavator, initialize the parameters, collect data through each sensor, estimate the load power of the hybrid power machine, and estimate the SOC value of the super capacitor;
  • Step 2 The SOC value of the super capacitor is divided into low, medium, and high.
  • the SOC value is 0-30%, 30% ⁇ 60%, and 60% ⁇ 1, respectively, divided into low, medium, and high; Divided into large and small;
  • Step 3 Determine the motor generator 102 by judging the matching of the SOC value and the load power.
  • the motor generator 102 When the SOC value is high, the motor generator 102 is in neither the electric nor the power generation state, and the load power is all provided by the engine 101; when the load power is small, the motor generator 102 is in the power generation state, and the SOC value is increased at this time. , the engine 101 has a stable rotation speed;
  • the motor generator 102 When the SOC value, the motor generator 102 operates at a constant speed, when the load power is large, the motor generator 102 is in an electric state; when the load power is small, the motor generator 102 is in a power generation state; when the SOC value is high, regardless of the load power or the hour, The motor generator 102 is in an electric state; in step 4, the drive inverter 104 controls the operating state of the motor generator 102 according to the judgment of step 3.
  • the motor generator 102 is driven by the control device, wherein the control device is an on-board inverter, and the IGBT bridge arm of the inverter is driven to control the operation of the motor according to the control command;
  • the division of the SOC value may be divided according to the use condition, and the control mode of the motor generator is also changed.
  • the torque control mode may be used.
  • the choice of motor generators is not just for induction motors, but also for synchronous motors. It can be seen from the above embodiments that the present embodiment dynamically calculates the load power by controlling the SOC value in real time, and determines the working state of the motor generator by the combination of the SOC value and the load power, thereby preventing the engine overload and improving the whole machine. Fuel-saving rate, while adaptive engine speed regulation features, improve system versatility.
  • the hybrid power system and the energy control method thereof provided by the invention can determine the working state of the motor generator by the combination of the SOC value and the load power, prevent the engine from being overloaded, and improve the fuel economy of the whole machine. Therefore, the hybrid system of the present invention, its energy control method, and the hybrid machine provided with the hybrid system have industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Control Of Eletrric Generators (AREA)
  • Operation Control Of Excavators (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

La présente invention se rapporte à un procédé de commande d'énergie pour un système de puissance hybride, le procédé consistant à : collecter des informations de charge concernant un système de puissance hybride et selon les informations de charge, calculer une puissance de charge du système de puissance hybride ainsi qu'une valeur d'état de charge d'un supercondensateur ; selon les classifications prédéterminées de la valeur d'état de charge et de la puissance de charge, déterminer des niveaux de la valeur d'état de charge et de la puissance de charge qui sont obtenus par calcul ; et selon les niveaux de la valeur d'état de charge et de la puissance de charge, déterminer le meilleur état de fonctionnement d'un générateur de moteur (102), commander l'état de fonctionnement actuel du générateur de moteur (102) et arriver au meilleur état de fonctionnement du générateur de moteur. La présente invention se rapporte en outre à un système de puissance hybride et à une machine de puissance hybride. Dans le procédé de commande, l'état de fonctionnement du générateur de moteur est déterminé en combinant la valeur d'état de charge avec la puissance de charge, la surcharge du moteur est empêchée et le taux d'économie de carburant de tout le moteur est accru.
PCT/CN2014/076831 2013-05-27 2014-05-06 Machine de puissance hybride, système de puissance hybride et procédé de commande d'énergie pour ce dernier WO2014190842A1 (fr)

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CN103255801B (zh) * 2013-05-27 2015-08-26 上海华兴数字科技有限公司 一种混合动力机械的储能装置能量控制方法
CN103790205B (zh) * 2014-02-14 2016-11-02 上海华兴数字科技有限公司 混合动力建筑机械及其节能控制方法
DE202015008403U1 (de) * 2015-09-18 2016-12-20 Liebherr-Components Biberach Gmbh Elektrisch angetriebene Arbeitsmaschine mit Rückleistungsspeicherung
US10479348B2 (en) * 2016-02-16 2019-11-19 Ford Global Technologies, Llc Hybrid vehicle and method of reducing engine lugging
CN112977154B (zh) * 2019-12-17 2023-02-21 联合汽车电子有限公司 基于驾驶员操作行为预测的电能管理方法及系统和汽车
CN111945803A (zh) * 2020-08-25 2020-11-17 中国铁建重工集团股份有限公司 一种铲装机

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