CN107317348A - A kind of composite energy storage control method for taking into account energy and power - Google Patents
A kind of composite energy storage control method for taking into account energy and power Download PDFInfo
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- CN107317348A CN107317348A CN201611195526.5A CN201611195526A CN107317348A CN 107317348 A CN107317348 A CN 107317348A CN 201611195526 A CN201611195526 A CN 201611195526A CN 107317348 A CN107317348 A CN 107317348A
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- energy
- wave tube
- travelling wave
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
This paper presents a kind of composite energy storage control method for taking into account energy and power.This method fully sharp Power Electronic Technique and system integration technology, it is connected by energy energy-storage travelling wave tube by energy energy-storage travelling wave tube DC/DC current transformers with dc bus, the energy storage of power energy-storage travelling wave tube is connected by power energy-storage travelling wave tube DC/DC current transformers with dc bus, and dc bus connects AC load and/or AC network by composite energy storage DC/AC current transformers.Composite energy storage control method can realize that energy-storage travelling wave tube bidirectional current is reliable, improve microgrid and off-network conversion time, and the voltage pulsation of smooth load side and grid side reduces microgrid construction cost, promotes microgrid development.This method can be widely applied to the micro-grid system of individual layer and double-decker, and application scenarios include：Factory, industrial park, residential quarters, office buildings, villa etc..
Description
Technical field
A kind of composite energy storage control method for taking into account energy and power, belongs to electrical technology field.
Background technology
In energy-accumulating medium, energy type energy storage and power-type energy storage respectively have advantage and disadvantage.And lithium battery and super capacitor difference
It is the Typical Representative of both energy storage modes, if inciting somebody to action both compound uses, it is possible to achieve the optimum use of energy storage energy.Mixed
Close in energy storage photovoltaic generating system, there are a variety of connected modes.The composite energy storage photovoltaic generation system connected with bus bar side parallel way
System, it is possible to achieve the bidirectional current of super capacitor and lithium battery is controllable, and being subject to certain composite energy storage control strategy can realize
The Optimum utilization of composite energy storage unit.
The content of the invention
This paper presents a kind of composite energy storage control method for taking into account energy and power.This method fully profit power electronics
Technology and system integration technology, are connected by energy energy-storage travelling wave tube by energy energy-storage travelling wave tube DC/DC current transformers with dc bus,
The energy storage of power energy-storage travelling wave tube is connected by power energy-storage travelling wave tube DC/DC current transformers with dc bus, and dc bus passes through compound storage
Energy DC/AC current transformers connect AC load and/or AC network.Composite energy storage control method can realize that energy-storage travelling wave tube is two-way
Electric current is reliable, improves microgrid and off-network conversion time, and the voltage pulsation of smooth load side and grid side, reduction microgrid is built into
This, promotes microgrid development.This method can be widely applied to the micro-grid system of individual layer and double-decker, and application scenarios include：
Factory, industrial park, residential quarters, office buildings, villa etc..
Brief description of the drawings：
Fig. 1 is the system framework figure of composite energy storage
Fig. 2 composite energy storage coordination control strategies
Fig. 3 control flow charts
The coordination control allocation result of Fig. 4 composite energy storages
Embodiment：
Fig. 1 is the system framework figure of composite energy storage, including host computer " composite energy storage controller " one, energy energy storage
Element is connected by energy energy-storage travelling wave tube DC/DC current transformers with dc bus, and the energy storage of power energy-storage travelling wave tube passes through power energy storage member
Part DC/DC current transformers are connected with dc bus, and dc bus connects AC load by composite energy storage DC/AC current transformers, and/or
Person's AC network.Two DC/DC and DC/AC common bus.Composite energy storage controller passes through particular communication and Liang Tai as host computer
DC/DC and DC/AC communications, the voltage and current value of composite energy storage current transformer DC/AC outputs is gathered by electric quantity acquisition module, is adopted
Collect the state switched at composite energy storage current transformer DC/AC and external electrical network points of common connection PCC；And the tune of higher level can be received
Degree.
It 1. is incorporated into the power networks
When composite energy storage system grid connection is run, grid-connected switch closure, energy energy-storage travelling wave tube DC/DC current transformers do voltage stabilizing control
System, the instruction that power energy-storage travelling wave tube DC/DC current transformers receive composite energy storage controller is run in the way of electric current or Power Control.
Composite energy storage DC/AC current transformers receive the instruction of composite energy storage controller or according to set operation rule with active/idle electricity
Stream or power control mode work.
When composite energy storage controller detects PCC points switch in closure state, by logic switch set to " energy storage power
It is given " place.Active/the reactive current or power control command values of composite energy storage DC/AC current transformers send into single order as input value
Low pass filter, low frequency part and the primary signal of output are formulated after subtracting each other as power energy-storage travelling wave tube DC/DC current transformers power
It is worth and issues, as shown in Figure 2.
In control strategy, the main SOC for considering power energy-storage travelling wave tube and maximum charge-discharge electric power restrictive condition work as power
When the SOC of energy-storage travelling wave tube is relatively low, time constant filter Tf is adjusted, allows fill power energy-storage travelling wave tube more and puts less, its increment is stored up by power
Energy element SOC deviates depending on 50% degree；When the SOC of power energy-storage travelling wave tube is higher, allows power energy-storage travelling wave tube to fill less and put more,
Depending on the degree that its increment deviates 50% by power energy-storage travelling wave tube SOC.When the charge-discharge electric power set-point of power energy-storage travelling wave tube surpasses
When going out KB limit, by KB limit discharge and recharge.
2. off-grid operation
Grid-connected to switch off when composite energy storage system off-network, energy energy-storage travelling wave tube DC/DC current transformers do voltage stabilizing control,
The instruction that power energy-storage travelling wave tube DC/DC current transformers receive composite energy storage controller is run in the way of electric current or Power Control.
In this case, composite energy storage controller detects PCC points switch when being off, by logic switch set to " energy storage work(
Rate detection " place, composite energy storage DC/AC current transformers no longer receive power instruction from host computer, carry out constant voltage constant frequency work, and it is exported
The size of power is determined by load.
Electric quantity acquisition module gathers voltage, electric current and the power signal of composite energy storage DC/AC current transformers, obtains composite energy storage
The reality outputs of DC/AC current transformers is active/reactive power value, the value is sent into low-pass first order filter, the low frequency part of output
As power energy-storage travelling wave tube DC/DC current transformers power formulation value and issued after subtracting each other with primary signal, as shown in Figure 2.
In control strategy, the main SOC for considering power energy-storage travelling wave tube and maximum charge-discharge electric power restrictive condition work as power
When the SOC of energy-storage travelling wave tube is relatively low, time constant filter Tf is adjusted, allows fill power energy-storage travelling wave tube more and puts less, its increment is stored up by power
Energy element SOC deviates depending on 50% degree；When the SOC of power energy-storage travelling wave tube is higher, allows power energy-storage travelling wave tube to fill less and put more,
Depending on the degree that its increment deviates 50% by power energy-storage travelling wave tube SOC.When the charge-discharge electric power set-point of power energy-storage travelling wave tube surpasses
When going out KB limit, by KB limit discharge and recharge.
Had extended cycle life due to power energy-storage travelling wave tube, charge-discharge velocity it is fast, so using the SOC of power energy-storage travelling wave tube as base
Standard, and consider that its peak power is limited, and then adjust time constant filter Tf：When power energy-storage travelling wave tube SOC is smaller, make it many
Fill and put less；When SOC is larger, allow its puts to fill less more.The advantage of power energy-storage travelling wave tube is played, filling for energy energy-storage travelling wave tube is reduced
Discharge time, extends its service life, improves the Technical Economy of overall energy storage.Wherein Fig. 3 is specific control flow chart.
In experiment, the DC/AC power of energy accumulation current converter is measured per 5s using PLC, by becoming after time constant filtering algorithm
The load power of acquisition energy energy-storage travelling wave tube and power energy-storage travelling wave tube and the power instruction for issuing power energy-storage travelling wave tube, Fig. 4 are to adopt
A length of 3800s experimental result during sample.From experimental result as can be seen that energy energy-storage travelling wave tube and power energy-storage travelling wave tube power are obtained
Preferable distribution, control strategy is effective.
Claims (1)
1. this paper presents a kind of composite energy storage control method for taking into account energy and power.This method fully profit power electronics skill
Art and system integration technology, are connected, work(by energy energy-storage travelling wave tube by energy energy-storage travelling wave tube DC/DC current transformers with dc bus
The energy storage of rate energy-storage travelling wave tube is connected by power energy-storage travelling wave tube DC/DC current transformers with dc bus, and dc bus passes through composite energy storage
DC/AC current transformers connect AC load and/or AC network.Composite energy storage control method can realize the two-way electricity of energy-storage travelling wave tube
Stream is reliable, improves microgrid and off-network conversion time, and the voltage pulsation of smooth load side and grid side, reduction microgrid is built into
This, promotes microgrid development.This method can be widely applied to the micro-grid system of individual layer and double-decker, and application scenarios include：
Factory, industrial park, residential quarters, office buildings, villa etc..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611195526.5A CN107317348A (en) | 2016-12-16 | 2016-12-16 | A kind of composite energy storage control method for taking into account energy and power |
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| CN201611195526.5A CN107317348A (en) | 2016-12-16 | 2016-12-16 | A kind of composite energy storage control method for taking into account energy and power |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856924A (en) * | 2012-08-29 | 2013-01-02 | 中国能源建设集团广东省电力设计研究院 | Microgrid smooth switch control method and strategy based on composite energy storage |
| JP2014168328A (en) * | 2013-02-28 | 2014-09-11 | Shimizu Corp | Self-sustained operation system and method of distributed power supply |
| CN105226682A (en) * | 2015-11-04 | 2016-01-06 | 国家电网公司 | A kind of hybrid energy-storing stabilizes photovoltaic power wave method |
-
2016
- 2016-12-16 CN CN201611195526.5A patent/CN107317348A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856924A (en) * | 2012-08-29 | 2013-01-02 | 中国能源建设集团广东省电力设计研究院 | Microgrid smooth switch control method and strategy based on composite energy storage |
| JP2014168328A (en) * | 2013-02-28 | 2014-09-11 | Shimizu Corp | Self-sustained operation system and method of distributed power supply |
| CN105226682A (en) * | 2015-11-04 | 2016-01-06 | 国家电网公司 | A kind of hybrid energy-storing stabilizes photovoltaic power wave method |
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Application publication date: 20171103 |
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