WO2017041752A1 - Système d'économie d'énergie de générateur diesel d'alimentation électrique continue à fonctionnement intermittent - Google Patents

Système d'économie d'énergie de générateur diesel d'alimentation électrique continue à fonctionnement intermittent Download PDF

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Publication number
WO2017041752A1
WO2017041752A1 PCT/CN2016/098624 CN2016098624W WO2017041752A1 WO 2017041752 A1 WO2017041752 A1 WO 2017041752A1 CN 2016098624 W CN2016098624 W CN 2016098624W WO 2017041752 A1 WO2017041752 A1 WO 2017041752A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
power
load
generator set
energy
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PCT/CN2016/098624
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English (en)
Chinese (zh)
Inventor
安同会
贾凯
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深圳市安顺节能科技发展有限公司
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Publication of WO2017041752A1 publication Critical patent/WO2017041752A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • the utility model belongs to the field of energy application, and particularly relates to an energy-saving system for a generator set with intermittent operation and continuous power supply.
  • Generator sets are widely used. Conventional generator sets must ensure constant output of standard frequency and voltage.
  • the unit speed must be constant (the domestic generator set usually has a speed of 1500 rpm and a frequency of 50 Hz).
  • the unit When the load has power demand, the unit must be constant regardless of the demand. The speed continues to run.
  • the installed capacity of the generator set must meet the maximum load demand.
  • the load is small, the “large horse-drawn carriage” has low energy efficiency.
  • each working cycle has a short time. Negative power (energy feedback), even when negative power is generated, the generator set will continue to operate and still consume energy.
  • Figure 1 is a graph showing the typical characteristics of a certain type of rated power 100kW diesel engine. As shown in the shaded part of Figure 1, the diesel engine outputs a power consumption of about 206 g/kWh at a power of about 70 kW at a speed of about 1250 rpm, which is called "optimal economic fuel consumption.”
  • the diesel engine used as the generator set has an engine speed of 1500 rpm and a minimum fuel consumption of 208 g/kWh.
  • the fuel consumption rate is as high as 350 g/kWh, which is the lowest fuel consumption rate at 1500 rpm. 1.68 times, which is 1.7 times the best economic fuel consumption.
  • Diesel engine fuel consumption diesel engine cooling fan and other self-consumption power of 6 to 8%, diesel engine speed used as generator engine is constant at 1500 rpm, self-consumption power and load size have little relationship.
  • a load is cycled once per hour, power demand 5kW (running 0.75 hours) ⁇ 75kW (running 0.25 hours) cycle alternating, working 20 hours energy demand total 450kWh; assuming power system power factor 0.8, diesel engine
  • the self-consumption power is 6kW, then the corresponding output power of the diesel engine is 12.25kW. Turning 0.75 hours) ⁇ 100 kW (running for 0.25 hours), the diesel engine runs for 20 hours and consumes a total of 684 kWh of energy.
  • the energy consumption is 184 kWh for 15 hours at 12.25 kW, and 500 kWh for 5 hours at 100 kW.
  • the diesel engine is operated at 1500 rpm, the fuel consumption is about 325 g/kWh at a power of 12.25 kW, and the fuel consumption is 240 g/kWh at a power of 100 kW.
  • the fuel consumption of the diesel engine is 60kg and 120kg respectively, and the total fuel consumption is 180kg.
  • the ideal fuel consumption of diesel engine Assume that the control diesel engine always works at the ideal fuel consumption - the best economic fuel consumption rate (206g / kWh), that is, the speed of 1250rpm, the power of 70kW, the power factor of the power system is 0.8 and the diesel engine power consumption is 6kW. Under the condition, when the output energy demand is 450kWh, the diesel engine's self-consumption energy is 615kWh (450 ⁇ 0.8 ⁇ 64), the total fuel consumption is 126.7kg (615 ⁇ 206 ⁇ 1000); the diesel engine only takes 3.79 hours (615 ⁇ ). 70). Compared with the actual fuel consumption of conventional diesel generator sets, fuel economy is 30%.
  • the conventional diesel generator set has no energy storage device.
  • the generator set When the load has energy demand, the generator set must work continuously, and the output energy of the unit must be consumed in real time. That is, the output power of the generator set must be adjusted and matched according to the load size in real time, and the diesel engine cannot be always realized. Operating in the best economic fuel consumption area, the ideal energy efficiency cannot be achieved. The unevenness of the load seriously affects the energy efficiency of the diesel generator set.
  • Some loads such as cranes, the diesel generator set must be matched according to the maximum power, and the rated power is more than three times larger than the average power of the load, which is larger than the minimum waiting power. Eight times more than ten times, energy efficiency is very low.
  • the object of the present invention is to provide an energy-saving system for a generator set which is operated with an optimal economical energy consumption and has high energy efficiency and intermittent operation and continuous power supply.
  • the utility model relates to an energy-saving system for a generator set with intermittent operation and continuous power supply, comprising: a generator set, a system controller, an AC/DC rectifier, a DC/AC inverter, a transformer, a battery pack, a bidirectional DC/DC converter
  • the generator set includes an engine and a generator connected to the engine. After the generator set is connected with the AC/DC rectifier, it is divided into two paths through the DC bus, one is connected to the DC/AC inverter and the transformer in turn, and the other is connected to the bidirectional DC/DC converter and the battery pack in sequence, and the system is controlled.
  • the device performs signal control on the battery pack, the bidirectional DC/DC converter and the generator set, and the transformer is connected to the load, and the charge and discharge power of the battery pack is greater than or equal to the load power.
  • the transformer outputs 50 Hz alternating current.
  • the utility model provides an energy-saving system for a generator set with intermittent operation and continuous power supply.
  • the energy-saving system adds a battery pack with a charge and discharge power greater than or equal to the load power on the basis of the original generator set, and the load energy demand can be from the battery pack. Independently provided, the battery pack discharge power is fully matched to the load power demand.
  • the control starts the generator set to work with the best economical energy consumption, and directly supplies energy to the load.
  • the surplus energy charges the battery pack.
  • the battery pack power rises to the set value, the generator set is turned off, and the energy demand is turned. It is provided by the battery pack to realize intermittent high-efficiency operation of the generator set without interruption.
  • the energy-saving system has higher energy-saving rate when the load fluctuates more and the low-load working time is longer.
  • Figure 1 is a graph showing the typical characteristics of a diesel engine
  • Figure 2 is a map of load power demand and diesel fuel consumption
  • FIG. 3 is a circuit connection block diagram of an energy-saving system of a generator set with intermittent operation and continuous power supply according to the present invention
  • the reference numerals are: 1, system controller; 2, transformer; 3, DC / AC inverter; 4, battery pack; 5, bidirectional DC / DC converter; 6, AC / DC rectifier; 8, engine.
  • an energy-saving system for a generator set with intermittent operation and continuous power supply includes: system controller 1, transformer 2, DC/AC inverter 3, battery pack 4, bidirectional DC/DC conversion
  • the AC 5 , the AC/DC rectifier 6 and the generator set are composed of an engine 8 and a generator 7 connected to the engine 8 .
  • connection of each component is as follows:
  • the engine 8 is mechanically connected with the generator 7 to form a conventional generator set.
  • the current output end of the generator 7 is connected to the AC input end of the AC/DC rectifier 6, is rectified by the AC/DC rectifier 6, and output to the DC bus, DC/AC inverter.
  • the DC input terminal of 3 is connected to the DC bus, the DC/AC inverter 3 outputs 50Hz AC and the input of the transformer 2, and the transformer 2 outputs 50Hz AC to supply the load.
  • the battery pack 4 is connected to the DC bus through a bidirectional DC/DC converter 5, and the system controller 1 monitors the battery pack 4 and controls the charging and discharging of the battery pack 4 by controlling the bidirectional voltage of the bidirectional DC/DC converter 5, according to the battery pack.
  • the SOC (State of Charge) of 4 controls the engine 8 to start, run or shut down.
  • the generator set with appropriate power and voltage level can be selected, and the capacity of the generator assembly machine can be configured according to the average power demand.
  • the generator set can be configured according to the maximum power demand of the load.
  • the working principle of the utility model determines the The fuel consumption of the optional generator set has little to do with the installed capacity. It is related to the selected engine 8 characteristics, and the speed and maximum output power are set according to the optimal economic energy consumption of the selected engine.
  • the characteristic group is equipped with a battery pack 4 that is suitable for charging and discharging power and working voltage, and sets the working range of the battery pack 4SOC.
  • Start system controller 1, self-test battery pack 4, etc. The system is normal before it is put into operation. After the load is turned on, when the SOC capacity of the battery pack 4 is within the set operating range, the load energy demand is provided by the battery pack 4, and the genset is turned off.
  • the battery pack 4 energy supplies a constant voltage direct current to the DC bus through the bidirectional DC/DC converter 5, the DC bus is connected to the DC/AC inverter 3, and the DC/AC inverter 3 converts the direct current into a standard 50 Hz alternating current to the transformer. 2.
  • Transformer 2 delivers regulated, constant-frequency AC to the load.
  • the system controller 1 When the system controller 1 detects that the SOC capacity of the battery pack 4 falls to the set low position, the system controller 1 controls the engine 8 to start, and operates at a constant speed according to the set speed (frequency), and the generator 7 is at a fixed frequency. (Depending on the set engine 8 speed and the number of pole pairs of the generator 7 winding), the AC power is output. The AC power is rectified and converted to DC power by the AC/DC rectifier 6 and sent to the DC bus, which in turn passes through the DC/AC inverter 3 and the transformer.
  • the system controller 1 controls the discharge of the battery pack 4 by controlling the DC bus terminal voltage of the bidirectional DC/DC converter 5 to make up the load demand; when the load power When the output power of the genset is less than the set, the system controller 1 charges the battery pack 4 by controlling the voltage of the battery terminal of the bidirectional DC/DC converter 5, so that the output power of the genset is always maintained near the set optimal operating condition. Ensure that the engine 8 is operating at optimum economical fuel consumption.
  • the system controller 1 When the system controller 1 detects that the SOC capacity of the battery pack 4 rises to the set high level, the system controller 1 issues a command to the genset, and the genset decelerates according to the inherent program of the unit - idle speed - flameout.
  • the utility model provides an energy-saving system for a generator set with intermittent operation and continuous power supply for different working load characteristics, and the energy-saving system protects various components and their connection relationships, and does not involve software.
  • the energy-saving system uses a battery pack 4 power supply.
  • the battery pack 4 can meet the short-term power supply requirements of the load, and achieve full matching of output power and load power demand to improve energy efficiency; the engine 8 is either working in the optimal economic fuel consumption area. Either turn off the flame to achieve the highest energy efficiency; control the engine 8 never overload, do not smoke black; shorten the running time of the generator set, extend the maintenance cycle.
  • the battery pack 4 meets the maximum power demand of the load, and can be independently powered for a short time, so that the power supply and the load power are completely matched; the engine 8 works intermittently, and once the engine 8 is put into operation, it is controlled to work in the optimal working condition, the fuel Highest efficiency;
  • the system is widely used, such as cranes, pumping units, oil platforms, ship auxiliary machines, etc. It is especially suitable for working conditions with uneven load, the more uneven the load, the higher the fuel economy; the crane is used for variable frequency drive.
  • the DC bus is directly connected to the DC terminal of the inverter. Supply or recycle energy to the frequency converter and reuse it;

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

L'invention porte sur un système d'économie d'énergie de générateur diesel d'alimentation électrique continue à fonctionnement intermittent qui comporte : un groupe électrogène, un dispositif de commande de système (1), un redresseur CA/CC (6), un onduleur CC/CA (3), un transformateur (2), un bloc-piles (4) et un convertisseur CC/CC bidirectionnel (5). Le système d'économie d'énergie ajoute, sur la base du groupe électrogène, la batterie (4) dont la puissance de charge/décharge est supérieure ou égale à la puissance d'une charge. La demande en énergie de la charge peut être satisfaite indépendamment par la batterie (4). La puissance de décharge de la batterie (4) correspond entièrement à la puissance appelée de la charge. Lorsque la batterie (4) est faible en énergie, le groupe électrogène est commandé et mis en marche pour fonctionner à la consommation d'énergie économique optimale, pour fournir de l'énergie directement à la charge, et pour charger la batterie (4) avec un éventuel surplus d'énergie. Lorsque le niveau d'énergie de la batterie (4) a augmenté jusqu'à une valeur de consigne, le groupe électrogène est coupé et la demande en énergie est satisfaite par la batterie (4), ce qui permet de mettre en œuvre un fonctionnement intermittent et à haut rendement du groupe électrogène et une alimentation sans coupure. Plus les fluctuations de charge sont grandes et plus le temps de fonctionnement à faible charge est long, plus le taux d'économie d'énergie du système d'économie d'énergie dans de telles conditions de travail est élevé.
PCT/CN2016/098624 2015-09-11 2016-09-09 Système d'économie d'énergie de générateur diesel d'alimentation électrique continue à fonctionnement intermittent WO2017041752A1 (fr)

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CN201520706520.4U CN204928358U (zh) 2015-09-11 2015-09-11 一种间歇性运转持续性供电的柴油发电机节能系统
CN201520706520.4 2015-09-11

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CN111463824A (zh) * 2020-04-10 2020-07-28 北京钛橙智驾科技有限公司 一种可移动式发电系统
US10998732B2 (en) 2019-03-20 2021-05-04 Caterpillar Inc. System and method for diverse multi-source energy management
US11188045B2 (en) 2019-03-18 2021-11-30 Caterpillar Inc. Energy management system with gensets and energy storage
US11242044B2 (en) 2018-07-18 2022-02-08 Kohler Co. Motor generator control for fixed fuel source engine
US11264918B2 (en) 2017-12-14 2022-03-01 Kohler Co. Isolated inverters

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CN204928358U (zh) * 2015-09-11 2015-12-30 深圳市安顺节能科技发展有限公司 一种间歇性运转持续性供电的柴油发电机节能系统
CN204915334U (zh) * 2015-09-11 2015-12-30 深圳市安顺节能科技发展有限公司 一种增程式全电驱动低速牵引车
KR102635868B1 (ko) * 2016-01-26 2024-02-14 삼성전자주식회사 전자 장치 및 그의 제어방법
CN109525031A (zh) * 2018-09-28 2019-03-26 无锡华东自动化科技有限公司 柴油机变速供电节油系统
CN110341691B (zh) * 2019-07-30 2020-09-01 上海振华重工(集团)股份有限公司 一种跨运车双宽节能方法及系统
CN112736976A (zh) * 2020-12-30 2021-04-30 中国石油天然气集团有限公司 一种用于石油电动钻机的混合动力微电网系统与控制方法

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CN102957143A (zh) * 2011-08-09 2013-03-06 Bae系统控制有限公司 混合型发电机组
CN203476520U (zh) * 2013-09-11 2014-03-12 广东保达动力技术有限公司 变速发电机组供电系统
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11264918B2 (en) 2017-12-14 2022-03-01 Kohler Co. Isolated inverters
US11923787B2 (en) 2017-12-14 2024-03-05 Kohler Co. Isolated inverters
US11242044B2 (en) 2018-07-18 2022-02-08 Kohler Co. Motor generator control for fixed fuel source engine
US11667273B2 (en) 2018-07-18 2023-06-06 Kohler Co. Motor generator control for fixed fuel source engine
US11188045B2 (en) 2019-03-18 2021-11-30 Caterpillar Inc. Energy management system with gensets and energy storage
US10998732B2 (en) 2019-03-20 2021-05-04 Caterpillar Inc. System and method for diverse multi-source energy management
CN111463824A (zh) * 2020-04-10 2020-07-28 北京钛橙智驾科技有限公司 一种可移动式发电系统

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