CN106655265A - Micro-grid energy management system for multiple energy sources - Google Patents

Micro-grid energy management system for multiple energy sources Download PDF

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Publication number
CN106655265A
CN106655265A CN201611213825.7A CN201611213825A CN106655265A CN 106655265 A CN106655265 A CN 106655265A CN 201611213825 A CN201611213825 A CN 201611213825A CN 106655265 A CN106655265 A CN 106655265A
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CN
China
Prior art keywords
energy
micro
storage
load
capacitance sensor
Prior art date
Application number
CN201611213825.7A
Other languages
Chinese (zh)
Inventor
谢文龙
俞卫
袁炜
奚俊凯
Original Assignee
上海致远绿色能源股份有限公司
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Application filed by 上海致远绿色能源股份有限公司 filed Critical 上海致远绿色能源股份有限公司
Priority to CN201611213825.7A priority Critical patent/CN106655265A/en
Publication of CN106655265A publication Critical patent/CN106655265A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention aims at providing a micro-grid energy management system for multiple energy sources. The micro-grid energy management system is characterized by comprising a clean energy power generation system, a renewable energy power generation system, an energy storage system, a load system and a micro-grid bus. Compared with the prior art, the micro-grid energy management system has the technical characteristics that real-time electric parameters obtained by a real-time electric quantity collection device of a monitoring system are firstly transmitted to a corresponding control system and then transmitted to a dispatching system through the control system via a communication bus, and the real-time electric parameters include voltage, current, power, an energy-storage charged state and the like. The dispatching system of a power distribution network transmits an adjusting instruction to an energy control system. Output power of various power generation systems are adjusted after the decision, and meanwhile, loads are switched.

Description

A kind of microgrid energy management system for multiple-energy-source
Technical field
The present invention relates to a kind of energy management method for micro-grid of the multiple-energy-source based on from grid-connected automatic switchover.
Background technology
The characteristics of power output of clean energy resource has intermittent and randomness, particularly job site is island, to be answered To exceedingly odious environment, and load consumption is also to change constantly, has a strong impact on the stable operation of micro-grid system.Same hour hands To this Isolated Network System in island, when clean energy resource power output is more than bearing power, unnecessary electric energy cannot feed back to electrical network, Cause the waste of resource;When the unexpected fluctuation of micro-capacitance sensor bus is run into, it is impossible to timely adjusted, load can be caused Injury, while producing dangerous.
The content of the invention
It is an object of the invention to provide a kind of contain based on various clean energy resourcies, it is with diesel power generation system with energy-storage units Auxiliary microgrid energy management system.
In order to achieve the above object, the technical scheme is that there is provided a kind of microgrid energy pipe for multiple-energy-source Reason system, it is characterised in that including clear energy sources electricity generation system, renewable energy system, energy-storage system, load system and Micro-capacitance sensor bus, clear energy sources electricity generation system, renewable energy system and energy-storage system are accessed micro- by respective switch Electrical network bus, load system accesses micro-capacitance sensor bus also by switch, micro-capacitance sensor bus and clear energy sources electricity generation system, renewable Each switch between energy electricity generation system and energy-storage system is connected respectively with respective micro- source controller, load system and micro-capacitance sensor Switch between bus is connected with load governor, each micro- source controller and load governor and micro-capacitance sensor central controller phase Even, micro-capacitance sensor central controller then connects power distribution network scheduling system;
The management system also includes monitoring system, and monitoring system includes being distributed in clear energy sources electricity generation system, renewable Energy electricity generation system, energy-storage system, load system each be used for real-time data collection intelligent monitoring terminal, intelligent monitoring end System is dispatched by communication network and power distribution network and sets up data communication in end.
Preferably, the clear energy sources electricity generation system is described renewable using wind generator system and photovoltaic generating system Energy electricity generation system adopts diesel generating system.
Preferably, the wind generator system includes wind power generating set, and the photovoltaic generating system includes photovoltaic generation The output of array, wind power generating set and photovoltaic power generation array connects respectively respective DC-DC circuit, two-way DC-DC circuit The input of the output connection PCS inverters of output and the energy-storage system.
Preferably, when the voltage on the micro-capacitance sensor bus fluctuates in normal certain limit, and the energy-storage system Full state is also at, the wind generator system and the photovoltaic generating system output loading power unit reach natural stability Balance;
When the voltage on the micro-capacitance sensor bus it is higher, by the micro- source controller being connected with the energy-storage system to the storage Energy system is charged storage energy, if the voltage on the micro-capacitance sensor bus is reduced or voltage raises trend and delays, if Energy-storage system is filled with or energy-storage system management reduces charging times strategy and starts to extend battery, voltage Still be increased to certain value, then the honourable condition that the power distribution network scheduling system is monitored according to the monitoring system, Jing By micro-capacitance sensor central controller, micro- source controller or load governor, switch on-off generating equipment and user load power unit Equipment, Switching Strategy is that input AC load has precedence over reduction unit generation;
Low voltage on the micro-capacitance sensor bus, by the micro- source controller being connected with the energy-storage system PCS is passed through Inverter electric discharge releases energy, if the energy-storage system has been put into limiting value or battery management uses the longevity to extend battery Life reduces discharge time strategy and starts, and voltage is still low to certain value, power distribution network scheduling system determine excision AC load or Person increases DC/DC sides unit generation, or increases diesel engine unit incision, or PCS grid-connected inverters generator operations, and strategy is to increase Unit generation, has precedence over excision AC load.
Compared with prior art, technical characterstic of the invention is:
The real-time electric parameters that the real-time electric parameters harvester of monitoring system is obtained, are first transferred to corresponding control system, Include that voltage, electric current, power, energy storage are charged to scheduling system, real-time electric parameters by control system Jing transmission again State etc..Power distribution network dispatches system and sends regulating command to energy management system.To each electricity generation system output after decision-making Power is adjusted load simultaneously and switches over.
When the adjustment effect of wind generator system, photovoltaic generating system, diesel generating system, energy-storage system and load can not Meet micro-capacitance sensor internal power balance, when causing its voltage or frequency anomaly, Voltage Stability Control or frequency stable control need to be carried out System.
Clean energy resource output facet, by pcs system, effectively between distribution wind generator system and photovoltaic generating system Power output, it is ensured that the most effective utilization of clean energy resource.
Description of the drawings
Fig. 1 is the microgrid energy management system conceptual scheme of the present invention.
Specific embodiment
To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
A kind of microgrid energy management system for multiple-energy-source that the present invention is provided includes micro-capacitance sensor bus, micro-capacitance sensor one Subsystem and micro-capacitance sensor electrical secondary system are constituted.
Micro-capacitance sensor primary system is by wind generator system, photovoltaic generating system, diesel generating system, energy-storage system, load With dc bus composition.Each system is connected by switching switch with dc bus.
Wind generator system includes wind-driven generator, controller of fan, and wind energy DC/DC switch board.Wind-driven generator It is connected with air blower control cabinet, controller of fan wind energy DC/DC switch board is connected, and wind energy DC/DC switch board is connect by PCS switch boards Enter micro-capacitance sensor bus.
Photovoltaic generating system includes photovoltaic battery panel, photovoltaic DC distribution box and photovoltaic DC/DC switch boards, photovoltaic battery panel It is connected with photovoltaic DC distribution box, photovoltaic DC distribution box is connected with photovoltaic DC/DC switch boards, photovoltaic DC/DC switch boards pass through PCS switch boards access micro-capacitance sensor bus.
Diesel generating system and energy-storage system are also connected with micro-capacitance sensor bus, and energy-storage system is accessed micro- by PCS switch boards Electrical network bus.Energy-storage system is composite energy storage system, including two or more energy-storage system.
Each system is not directly accessed micro-capacitance sensor bus, but is accessed by being input into controller switching equipment.Input (output) distribution Equipment includes transformer, distribution line, breaker, switch and disconnecting link.
Micro-capacitance sensor electrical secondary system includes control system, monitoring system and communication system.
Communication system includes that COM1, communication network are constituted, and the communication network includes communication bus.
The power output of generator unit is contrasted with load power demand by monitoring system, to diesel-driven generator Power output is adjusted to be carried out charge and discharge control to meet load power demand to batteries, while suppressing dc bus electricity Pressure fluctuation.The monitoring system of the present invention includes measurement and controls various sensors and the intelligent monitoring terminal needed for the element. Each intelligent monitoring terminal dispatches system by the power distribution network in communication network connection control system.In the present embodiment, monitor System can include the electric parameters harvester in real time such as current transformer, voltage transformer, power meter.
Control system is divided into three layers, respectively upper strata, intermediate layer and bottom.Upper strata is that power distribution network dispatches system, intermediate layer For micro-capacitance sensor central controller, bottom is bottom controller, including micro- source controller and load governor.
Wind generator system, photovoltaic generating system, diesel generating system, various energy-storage systems and load are matched somebody with somebody by input Switch in electric equipment and output distribution equipment is connected with the micro-capacitance sensor bus.Micro- source controller and the wind-power electricity generation system System, photovoltaic generating system, diesel generating system, various energy-storage systems are corresponded and are connected, and each micro- source controller is also right with its Connecting valve between the system answered and micro-capacitance sensor bus is connected, for controlling each systematically access, excision.Load governor with Load is connected, and is also connected with the connecting valve between the load and micro-capacitance sensor bus, for accessing with controlling load, cutting off.
Load in the present embodiment includes appliance load and production load on island, by load cabinet and output distribution arrange with Micro-capacitance sensor bus is connected.
Energy storage side of the present invention on DC master row is provided with batteries (energy-storage system), Generation Side by photovoltaic and The DC/DC convert charging units of blower fan, in the PCS bidirectional energy-storage inverter charge/discharge units of electricity consumption side apparatus, dc bus electricity By DC/DC convert chargings unit and PCS bidirectional energy-storage inverter charge/discharge unit Comprehensive Controls, fast response time realizes energy to pressure Amount autobalance, can effectively stable DC busbar voltage.
Analyze from power balance, there are three kinds:
1) generating coulomb balance:
It is reacted on dc bus and shows, voltage (dead band) fluctuation, such case, electric power storage in normal certain limit Pond group is also at full state, and it is steady that the DC/DC and pcs system output loading power unit of photovoltaic wind turbine power generation equipment reach nature Allocate weighing apparatus.
2) generating surplus, electricity consumption are not enough
It is reacted on dc bus and shows, voltage is higher, such case is that battery management unit is charged and deposits first Energy storage capacity, DC bus-bar voltage can raise or increase voltage raise trend, if fill with or battery management for extend Battery and reduce the startup of charging times strategy, voltage is still increased to certain value, then centralized monitoring system control root According to honourable condition, Centralized Monitoring control DC/DC switchings generating equipment and user load power unit equipment, strategy is input AC load has precedence over reduction unit generation, to ensure Multifunctional electric as far as possible.
3) generation deficiency, electricity consumption are excessive
It is reacted on dc bus and shows, low voltage is that the energy of batteries storage is released by PCS electric discharges first Exoergic amount, if battery has been put into limiting value or battery management opened to extend battery reduction discharge time strategy Dynamic, voltage is still low to certain value, centralized monitoring system decision excision AC load or increase DC/DC sides unit generation, Also diesel engine unit incision can may be increased, PSC generates electricity by way of merging two or more grid systems machine operation, and strategy is to increase DC/DC sides unit generation, has precedence over and cut Except AC load, to ensure generating as much as possible, reduce bavin machine and use.
Generation Control
Power balance is actually stably associated with DC bus-bar voltage, stabilizes DC bus-bar voltage, actual also to do Power balance is arrived.On the basis of stable DC busbar voltage, can accomplish to plan in advance by Generation Control and load plan Power balance, reduces battery charging and discharging number of times, improves AC output electric energy performance assessment criteria, can also effectively improve system reliability Property.According to Generation Control and power consumption control longtime running data accumulation, can gradually realize generating electricity and power consumption prediction, can naturally very Good balance generates electricity and electricity consumption.
Power consumption control
The system is designed as pure honourable natural energy resources, and purpose reduces the use of diesel engine unit as far as possible.One is that scene is sent out naturally During the relatively full state of electricity, the use electric loading all to be used can be put into, or according to generated energy putting into necessary electricity consumption Load, both ensure that electricity was available, it is possible to use whole system is more balanced;Two is in honourable nature electric generation relative scarcity state When, gradually excision should not use electric loading, to reach system balancing;Three is that honourable nature electric generation is rare and cannot be cut with electric loading Except when, diesel engine unit can only be started and be incorporated into the power networks powering load using pcs system, to reach whole system balance;Four is wind Light nature electric generation does not have output, such as must the switch-in part division of labor make, diesel engine unit powering load can only be started, such as unnecessarily cut out and remove User load, control system work waits honourable generating electricity by natural energy, restarting systems work.
Safety and stability
System stability referred in power station, because catastrophic discontinuityfailure causes the unexpected logout of unit or loads unexpected logout, greatly Break the stabilizing measures that power balance is likely to result in the case of electrical network unstability.
1) the unexpected logout of unit
It is assumed that unit logout, pcs system switches to the of short duration maintenance network operation of energy storage battery group, and calculating will balance electricity Net needs the load of excision.Meanwhile, centralized monitoring system is according to PCS working conditions, and it is grid-connected to notify that PCS prepares startup diesel engine Operation powering load.
2) unexpected logout is loaded
Assumed load logout, deducts present load power consumption, and centralized monitoring system is calculated and to balance electrical network needs The unit of logout, and control its DC/DC converting unit and Wind turbine shutdown operation.
Wherein load excision sends instruction by centralized monitoring system, is exchanged out with RS485 communication shut-offs by hardwire IO Close cabinet loop;Unit logout sends instruction by centralized monitoring system, and the shut-off for notifying unit is communicated by hardwire IO and RS485 The electronic switch of DC/DC devices, or controller of fan shutdown.
System discovery clean energy resource power output cannot be met after load power, can send order to bavin machine control unit, Lift bavin machine power output to make up power difference, while may proceed to be compared, when the output of bavin machine total power is appointed and cannot be met During load power, battery discharge will be controlled by batteries control module, power difference be made up, when generator unit output work Rate overload power when, unnecessary electric energy will be for for battery charging.

Claims (4)

1. a kind of microgrid energy management system for multiple-energy-source, it is characterised in that including clear energy sources electricity generation system, can be again Raw energy electricity generation system, energy-storage system, load system and micro-capacitance sensor bus, clear energy sources electricity generation system, renewable energy power generation System and energy-storage system access micro-capacitance sensor bus by respective switch, and load system accesses micro-capacitance sensor bus also by switch, Micro-capacitance sensor bus and clear energy sources electricity generation system, each switch between renewable energy system and energy-storage system respectively with respectively From micro- source controller be connected, the switch between load system and micro-capacitance sensor bus is connected with load governor, and each micro- source controls Device and load governor are connected with micro-capacitance sensor central controller, and micro-capacitance sensor central controller then connects power distribution network scheduling system;
The management system also includes monitoring system, and monitoring system includes being distributed in clear energy sources electricity generation system, regenerative resource Electricity generation system, energy-storage system, load system each be used for Real-time Collection electric parameters intelligent monitoring terminal, intelligent monitoring terminal System is dispatched by communication network and power distribution network and sets up data communication.
2. a kind of microgrid energy management system for multiple-energy-source as claimed in claim 1, it is characterised in that the cleaning Energy electricity generation system adopts diesel generation using wind generator system and photovoltaic generating system, the renewable energy system System.
3. a kind of microgrid energy management system for multiple-energy-source as claimed in claim 2, it is characterised in that the wind-force Electricity generation system includes wind power generating set, and the photovoltaic generating system includes photovoltaic power generation array, wind power generating set and photovoltaic The output of power generation array connects respectively respective DC-DC circuit, the output of two-way DC-DC circuit and the output of the energy-storage system The input of connection PCS inverters.
4. a kind of microgrid energy management system for multiple-energy-source as claimed in claim 3, it is characterised in that when described micro- Voltage on electrical network bus fluctuates in normal certain limit, and the energy-storage system is also at full state, the wind-force Electricity generation system and the photovoltaic generating system output loading power unit reach natural stability balance;
When the voltage on the micro-capacitance sensor bus it is higher, by the micro- source controller being connected with the energy-storage system to the energy storage system System is charged storage energy, and DC bus-bar voltage can raise or increase voltage and raise trend, if energy-storage system has filled The management of full or energy-storage system reduces charging times strategy and starts to extend battery, and voltage is still increased to necessarily Value, the then honourable condition that the power distribution network scheduling system is monitored according to the monitoring system, controls via micro-capacitance sensor central authorities Device processed, micro- source controller or load governor, switch on-off generating equipment and user load power unit equipment, Switching Strategy is Input AC load has precedence over reduction unit generation;
Low voltage on the micro-capacitance sensor bus, by the micro- source controller being connected with the energy-storage system PCS inversions are passed through Device electric discharge releases energy, if the energy-storage system has been put into limiting value or battery management subtracted to extend battery Few discharge time strategy starts, and voltage is still low to certain value, power distribution network scheduling system decision excision AC load or increasing Plus DC/DC sides unit generation, or increasing diesel engine unit incision, or PCS grid-connected inverters generator operations, strategy is to increase unit Generate electricity, have precedence over excision AC load.
CN201611213825.7A 2016-12-23 2016-12-23 Micro-grid energy management system for multiple energy sources CN106655265A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107516930A (en) * 2017-09-26 2017-12-26 武汉亿维登科技发展有限公司 Communication emergency power supply system
CN109193782A (en) * 2018-10-19 2019-01-11 广州供电局有限公司 Clean energy resource control system of online
CN109217447A (en) * 2018-09-19 2019-01-15 武汉华风电子工程有限公司 A kind of multi-energy complementation charging system and its method
CN109300289A (en) * 2018-10-16 2019-02-01 成都大熊猫繁育研究基地 A kind of the pulse electric net perimeter alarm system and method for development of renewable energy power supply

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CN102437566A (en) * 2011-10-17 2012-05-02 中国电力科学研究院 Direct-current-bus-voltage-based adaptive coordination control method for distributed power supply
CN104505867A (en) * 2015-01-04 2015-04-08 南京国臣信息自动化技术有限公司 Alternating current and direct current hybrid micro-grid system and control strategy thereof
CN105262135A (en) * 2015-11-11 2016-01-20 广东电网有限责任公司电力科学研究院 Wind, light and diesel storage microgrid system containing composite energy storage and coordinated control method during grid connection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102437566A (en) * 2011-10-17 2012-05-02 中国电力科学研究院 Direct-current-bus-voltage-based adaptive coordination control method for distributed power supply
CN104505867A (en) * 2015-01-04 2015-04-08 南京国臣信息自动化技术有限公司 Alternating current and direct current hybrid micro-grid system and control strategy thereof
CN105262135A (en) * 2015-11-11 2016-01-20 广东电网有限责任公司电力科学研究院 Wind, light and diesel storage microgrid system containing composite energy storage and coordinated control method during grid connection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107516930A (en) * 2017-09-26 2017-12-26 武汉亿维登科技发展有限公司 Communication emergency power supply system
CN107516930B (en) * 2017-09-26 2020-05-05 武汉亿维登科技发展有限公司 Emergency power supply system for communication
CN109217447A (en) * 2018-09-19 2019-01-15 武汉华风电子工程有限公司 A kind of multi-energy complementation charging system and its method
CN109300289A (en) * 2018-10-16 2019-02-01 成都大熊猫繁育研究基地 A kind of the pulse electric net perimeter alarm system and method for development of renewable energy power supply
CN109193782A (en) * 2018-10-19 2019-01-11 广州供电局有限公司 Clean energy resource control system of online

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