CN107732950A - A kind of Poewr control method and system of energy storage type power-supply system - Google Patents
A kind of Poewr control method and system of energy storage type power-supply system Download PDFInfo
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- CN107732950A CN107732950A CN201711146523.7A CN201711146523A CN107732950A CN 107732950 A CN107732950 A CN 107732950A CN 201711146523 A CN201711146523 A CN 201711146523A CN 107732950 A CN107732950 A CN 107732950A
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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
Abstract
The invention discloses a kind of Poewr control method and system of energy storage type power-supply system, this method includes：Obtain the power and transformer efficiency of the first load；When inverter breaks down, and transformer efficiency is less than the power of the first load, control two way convertor is in inversion output state, and controls energy-storage units to enter discharge condition, passes sequentially through two way convertor and bypass module to the first load supplying.The application breaks down in inverter, and transformer efficiency be less than first load power when, give the first load supplying by two way convertor using energy-storage units.So, even if inverter breaks down, still powered to the load using energy-storage units, slow down transformer increase-volume, reduce transformer station high-voltage side bus capacity payment, while can also reduce power network peak value.It can be seen that the application when inverter breaks down, can still cut down power network peak value, operating cost is reduced.
Description
Technical field
The present invention relates to energy storage type power technique fields, more particularly to a kind of Poewr control method of energy storage type power-supply system
And system.
Background technology
With the progress of energy storage electric source technology, energy storage type power supply is widely used to every field.
Most represented with uninterrupted power source (Uninterruptible Power System, UPS) again in energy storage type power supply
Property.UPS can typically include the parts such as power supply input circuit, rectifier, inverter, inversion and bypass module and energy storage battery.
Energy storage type power supply can realize uninterrupted power supply, i.e., mains input it is normal when, energy storage type power supply AC rectification into
Direct current, then again DC inverter into the alternating current for stablizing free from admixture, used to load；When power is off, energy storage type power supply
Energy-storage units can be enabled, the DC inverters of energy-storage units into the alternating current for stablizing free from admixture, continue powering load.
But when the inverter in energy storage type power supply breaks down, existing energy storage type power-supply system, energy-storage units without
Method continues powering load.Now, the power supply of load can only be realized by power network by bypass module.So, either electricity consumption is high
Peak phase, or low ebb phase, the electricity consumption of load can not play a part of the peak that disappears, electricity cost also can be corresponding both from power network
Increase.Therefore, how when inverter breaks down, cut down power network peak value using energy storage type power supply, reduce energy storage type power supply fortune
Row cost is that this area needs to solve the problems, such as.
The content of the invention
It is an object of the invention to provide a kind of Poewr control method and system of energy storage type power-supply system, to be sent out in inverter
During raw failure, cut down power network peak value using energy storage type power supply, reduce energy storage type power supply operating cost.
To achieve the above object, the present invention provides following technical scheme：
A kind of Poewr control method of energy storage type power-supply system, the system include transformer and uninterrupted power source；It is described not
Uninterruptible power includes two way convertor, inverter, energy-storage units and bypass module；One end of the transformer is connected with power network,
The other end of the transformer is connected with the first end of the two way convertor and one end of the bypass module respectively, the side
The other end of road module is connected with the first load, and the second end of the two way convertor is connected with one end of the inverter, institute
The other end for stating inverter is connected with the described first load, and the energy-storage units are connected with the second end of the two way convertor；
This method includes：
Obtain the power and transformer efficiency of first load；
When the inverter breaks down, and the transformer efficiency is less than the power of the described first load, institute is controlled
State two way convertor and be in inversion output state, and control the energy-storage units to enter discharge condition, pass sequentially through described two-way
Current transformer and the bypass module give first load supplying.
Alternatively, the two way convertor is controlled to be in inversion output state, and the control energy-storage units enter
Discharge condition, the two way convertor and the bypass module are passed sequentially through to first load supplying, including：
Control the energy-storage units to export the first discharge power, pass sequentially through the two way convertor, the bypass module
To the first load supplying, so that first discharge power is equal to the power of the described first load, or so that first electric discharge
Power and transformer efficiency sum are equal to the power of the described first load.
Alternatively, the other end of the transformer is also connected with the second load, and methods described also includes：
Obtain the power of second load；
When the inverter breaks down, and the transformer efficiency and the maximum discharge power sum of the energy-storage units
During the power sum that the power and described second loaded more than or equal to described first loads, the two way convertor is controlled to be in
Inversion output state, and control the energy-storage units to export the second discharge power, pass sequentially through the two way convertor and described
Bypass module gives the first load supplying, and gives second load supplying by the two way convertor.
Alternatively, the power for obtaining second load, including：
Using power detection mode, the described second power loaded is detected.
Alternatively, methods described also includes：
The working condition of the inverter is monitored in real time；
When the inverter breaks down, with predetermined manner alert.
A kind of power control system of energy storage type power-supply system, the energy storage type power-supply system include transformer and uninterrupted electricity
Source；The uninterrupted power source includes two way convertor, inverter, energy-storage units and bypass module；One end of the transformer with
Power network is connected, the other end of the transformer respectively with the first end of the two way convertor and one end phase of the bypass module
Even, the other end of the bypass module is connected with the first load, the second end of the two way convertor and the one of the inverter
End is connected, and the other end of the inverter is connected with the described first load, and the of the energy-storage units and the two way convertor
Two ends are connected；The control system includes：
First acquisition module, for obtaining the power and transformer efficiency of first load；
First power control module, for being broken down when the inverter, and the transformer efficiency is less than described the
During the power of one load, control the two way convertor to be in inversion output state, and control the energy-storage units to enter electric discharge
State, the two way convertor and the bypass module are passed sequentially through to first load supplying.
Alternatively, first power control module includes：
Power supply control submodule, for controlling the energy-storage units to export the first discharge power, pass sequentially through described two-way
Current transformer, the bypass module give the first load supplying, so that first discharge power is equal to the power of the described first load,
Or so that first discharge power and transformer efficiency sum are equal to the power of the described first load.
Alternatively, the other end of the transformer is also connected with the second load, and the control system also includes：
Second acquisition module, for obtaining the power of second load；
Second power control module, for being broken down when the inverter, and the transformer efficiency and the energy storage
When the maximum discharge power sum of unit is more than or equal to the power sum that the power of the described first load and described second load,
Control the two way convertor to be in inversion output state, and control the energy-storage units to export the second discharge power, lead to successively
The two way convertor and the bypass module are crossed to first load supplying, described second is given by the two way convertor
Load supplying.
Alternatively, second acquisition module includes：
Power detection submodule, for using power detection mode, detecting the described second power loaded.
Alternatively, in addition to：
Working Status Monitoring module, for monitoring the working condition of the inverter in real time；
Fault alarm module, for when the inverter breaks down, with predetermined manner alert.
Using the Poewr control method and system of energy storage type power-supply system provided by the invention, broken down in inverter,
And transformer efficiency be less than first load power when, give the first load supplying by two way convertor using energy-storage units.This
Sample, even if inverter breaks down, still powered to the load using energy-storage units, slow down transformer increase-volume, reduce transformer
Working capacity takes, while can also reduce power network peak value.It can be seen that the application can still cut down power network peak when inverter breaks down
Value, reduce operating cost.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the schematic flow sheet of the Poewr control method of energy storage type power-supply system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic block diagram of energy storage type power-supply system provided in an embodiment of the present invention；
Fig. 3 is the structural schematic block diagram of the power control system of energy storage type power-supply system provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 and Fig. 2 are refer to, Fig. 1 is the Poewr control method of energy storage type power-supply system provided in an embodiment of the present invention
Schematic flow sheet, Fig. 2 are the structural schematic block diagram of energy storage type power-supply system provided in an embodiment of the present invention.
Wherein, the energy storage type power-supply system includes transformer 21 and uninterrupted power source 22；Uninterrupted power source 22 includes two-way
Current transformer 221, inverter 222, energy-storage units 223 and bypass module 224；One end of transformer 21 is connected with power network, transformer
21 other end is connected with the first end of two way convertor 221 and one end of bypass module 224 respectively, bypass module 224 it is another
One end with first load is connected, the second end of two way convertor 221 is connected with one end of inverter 222, inverter 222 it is another
End is connected with the first load, and energy-storage units 223 are connected with the second end of two way convertor 221.This method comprises the following steps：
Step 101, the power and transformer efficiency for obtaining the first load.
Specifically, various pieces can be got in real time by the power monitoring unit being arranged in energy storage type power-supply system
Realtime power.According to the reality of real-time transformer efficiency and the size of bearing power, in real time adjustment accumulation power supply system components
When power.
Step 102, break down when inverter, and when transformer efficiency is less than the power of the first load, control two-way change
Stream device is in inversion output state, and controls energy-storage units to enter discharge condition, passes sequentially through two way convertor and bypass module
To the first load supplying.
It is appreciated that two way convertor possesses rectification and inversion function.Energy-storage units include energy-storage battery, and energy-storage battery
It can be but be not limited to novel energy-storing type battery, for example, lead carbon battery and lithium battery etc..
When transformer efficiency is less than the first bearing power, i.e. transformer efficiency can not meet load power demand, now one
As be under-voltage or system load power is larger, that is, current time may be considered peak times of power consumption.The electricity price of peak times of power consumption
Higher, i.e. the electric cost of peak times of power consumption is higher.
Specifically, control two way convertor is in inversion output state, and by adjusting the power output of two way convertor,
Control energy-storage units enter discharge condition, provide a system to energy-storage units discharge power, meet the power demand of the first load.Its
In, the current direction of energy-storage units can be：Energy-storage units → two way convertor → bypass module → first loads.
Certainly, in some special occasions, for example, because transformer fault or other factorses cause transformer efficiency to be zero,
First load power demand only can be met by energy-storage units；When transformer efficiency is not zero, the first load power demand can be with
Only met by energy-storage units, can also be met jointly by energy-storage units and power network.Therefore in some embodiments possibles, above-mentioned control
Two way convertor processed is in inversion output state, and controls energy-storage units to enter discharge condition, pass sequentially through two way convertor and
Bypass module can be specially to the process of the first load supplying：Control energy-storage units to export the first discharge power, pass sequentially through
Two way convertor, bypass module give the first load supplying, so that the first discharge power is equal to the power of the first load, or so that the
One discharge power and transformer efficiency sum are equal to the power of the first load.
Accumulation power supply system is also possible to simultaneously to the load supplying beyond the first load, therefore in some embodiments possibles
In, the other end of transformer is also connected with the second load, and this method can also include：
Obtain the power of the second load；
When inverter breaks down, and transformer efficiency and the maximum discharge power sum of energy-storage units are more than or equal to the
When the power of one load and the power sum of the second load, control two way convertor is in inversion output state, and controls energy storage
Unit exports the second discharge power, passes sequentially through two way convertor and bypass module to the first load supplying, and by two-way
Current transformer gives the second load supplying.
It is to be appreciated that the priority ratio second of above-mentioned first load loads height, i.e. energy storage type power supply System Priority meets the
The power demand of one load, on this basis, just to the second load supplying.
Wherein, energy-storage units are to the current direction of the first load supplying：Energy-storage units → two way convertor → bypass mould
Block → first loads.Energy-storage units are to the current direction of the second load supplying：Energy-storage units → two way convertor → the second is negative
Carry.
It is appreciated that the discharge power of energy-storage units should be less than or equal to maximum discharge power.First load power and
The power sum of second load can be less than or equal to transformer efficiency and the second discharge power sum of energy-storage units.Wherein,
Transformer efficiency can be zero, now, the second discharge power should be greater than or equal to the first bearing power and the second bearing power it
With；Transformer efficiency can also be not zero, and now, the second discharge power and transformer efficiency sum are more than or equal to the first load
Power and the second bearing power sum.
The power of second load can specifically be obtained by power detection mode, therefore in some embodiments possibles, on
Stating the process for the power for obtaining the second load can be specially：Using power detection mode, the power of the second load is detected.
To enable inverter to be learnt in time when breaking down, the working condition of inverter can be monitored in real time.Can at some
In row embodiment, the above method can also include：The working condition of monitoring inverter in real time；When inverter breaks down,
With predetermined manner alert.Wherein, predetermined manner can refer to buzzer yowl or LED flashing lamp mode.
Certainly, when the power of transformer is more than the power of the first load, it is understood that when being in the low power consumption phase,
The dump power of transformer can be utilized to be charged to energy-storage units, and then increase the electricity consumption of low power consumption phase.
In the present embodiment, inverter breaks down, and transformer efficiency be less than first load power when, utilize energy storage list
Member gives the first load supplying by two way convertor.So, even if inverter breaks down, still using energy-storage units to negative
Power supply is carried, slows down transformer increase-volume, reduces transformer station high-voltage side bus capacity payment, while can also reduce power network peak value.It can be seen that in inverter
It when breaking down, can still cut down power network peak value, reduce operating cost.
The power control system of energy storage type power-supply system provided in an embodiment of the present invention is introduced below, is described below
Energy storage type power-supply system power control system and the Poewr control method of above-described energy storage type power-supply system can be mutual
To should refer to.
Fig. 3 is refer to, Fig. 3 is that the structure of the power control system of energy storage type power-supply system provided in an embodiment of the present invention is shown
Meaning block diagram.
Wherein, the energy storage type power-supply system specifically may refer to the system block diagram shown in Fig. 2, will not be repeated here.The control
System processed can include：
First acquisition module 31, for obtaining the power and transformer efficiency of the first load；
First power control module 32, for being broken down when inverter, and transformer efficiency is less than the work(of the first load
During rate, control two way convertor is in inversion output state, and controls energy-storage units to enter discharge condition, passes sequentially through two-way change
Stream device and bypass module give the first load supplying.
In some embodiments possibles, the first power control module includes：
Power supply control submodule, for controlling energy-storage units to export the first discharge power, pass sequentially through two way convertor, side
Road module gives the first load supplying so that the first discharge power be equal to first load power, or so that the first discharge power and
Transformer efficiency sum is equal to the power of the first load.
In some embodiments possibles, the other end of transformer is also connected with the second load, and control system also includes：
Second acquisition module, for obtaining the power of the second load；
Second power control module, for being broken down when inverter, and transformer efficiency and the maximum of energy-storage units are put
When electrical power sum is more than or equal to the power sum that the power of the first load and second load, control two way convertor is in inverse
Become output state, and control energy-storage units to export the second discharge power, pass sequentially through two way convertor and bypass module to first
Load supplying, the second load supplying is given by two way convertor.
In some embodiments possibles, the second acquisition module includes：
Power detection submodule, for using power detection mode, detecting the power of the second load.
Alternatively, in addition to：
Working Status Monitoring module, for monitoring the working condition of inverter in real time；
Fault alarm module, for when inverter breaks down, with predetermined manner alert.
In the present embodiment, inverter breaks down, and transformer efficiency be less than first load power when, utilize energy storage list
Member gives the first load supplying by two way convertor.So, even if inverter breaks down, still using energy-storage units to negative
Power supply is carried, slows down transformer increase-volume, reduces transformer station high-voltage side bus capacity payment, while can also reduce power network peak value.It can be seen that in inverter
It when breaking down, can still cut down power network peak value, reduce operating cost.
Each embodiment is described by the way of progressive in specification, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
Directly it can be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The Poewr control method and system of energy storage type power-supply system provided by the present invention are described in detail above.
Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is simply used
Understand the method and its core concept of the present invention in help.It should be pointed out that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification
Fall into the protection domain of the claims in the present invention.
Claims (10)
1. a kind of Poewr control method of energy storage type power-supply system, it is characterised in that the system includes transformer and uninterrupted electricity
Source；The uninterrupted power source includes two way convertor, inverter, energy-storage units and bypass module；One end of the transformer with
Power network is connected, the other end of the transformer respectively with the first end of the two way convertor and one end phase of the bypass module
Even, the other end of the bypass module is connected with the first load, the second end of the two way convertor and the one of the inverter
End is connected, and the other end of the inverter is connected with the described first load, and the of the energy-storage units and the two way convertor
Two ends are connected；This method includes：
Obtain the power and transformer efficiency of first load；
When the inverter breaks down, and the transformer efficiency is less than the power of the described first load, control described double
Inversion output state is in current transformer, and controls the energy-storage units to enter discharge condition, passes sequentially through the Bidirectional variable-flow
Device and the bypass module give first load supplying.
2. the method as described in claim 1, it is characterised in that control the two way convertor to be in inversion output state, and
The control energy-storage units enter discharge condition, pass sequentially through the two way convertor and the bypass module to described the
One load supplying, including：
Control the energy-storage units to export the first discharge power, pass sequentially through the two way convertor, the bypass module to the
One load supplying, so that first discharge power is equal to the power of the described first load, or so that first discharge power
It is equal to the power of the described first load with transformer efficiency sum.
3. the method as described in claim 1, it is characterised in that the other end of the transformer is also connected with the second load, institute
Stating method also includes：
Obtain the power of second load；
When the inverter breaks down, and the transformer efficiency and the maximum discharge power sum of the energy-storage units are more than
Or equal to described first load power and it is described second load power sum when, control the two way convertor to be in inversion
Output state, and control the energy-storage units to export the second discharge power, pass sequentially through the two way convertor and the bypass
Module gives first load supplying, and gives second load supplying by the two way convertor.
4. method as claimed in claim 3, it is characterised in that the power for obtaining second load, including：
Using power detection mode, the described second power loaded is detected.
5. the method as described in any one of Claims 1-4, it is characterised in that methods described also includes：
The working condition of the inverter is monitored in real time；
When the inverter breaks down, with predetermined manner alert.
6. a kind of power control system of energy storage type power-supply system, it is characterised in that the energy storage type power-supply system includes transformer
And uninterrupted power source；The uninterrupted power source includes two way convertor, inverter, energy-storage units and bypass module；The transformation
One end of device is connected with power network, the other end of the transformer first end with the two way convertor and the bypass mould respectively
One end of block is connected, the other end of the bypass module with first load is connected, the second end of the two way convertor with it is described
One end of inverter is connected, the other end of the inverter with described first load is connected, the energy-storage units with it is described two-way
Second end of current transformer is connected；The control system includes：
First acquisition module, for obtaining the power and transformer efficiency of first load；
First power control module, for being broken down when the inverter, and the transformer efficiency is negative less than described first
During the power of load, control the two way convertor to be in inversion output state, and control the energy-storage units to enter discharge condition,
The two way convertor and the bypass module are passed sequentially through to first load supplying.
7. system as claimed in claim 6, it is characterised in that first power control module includes：
Power supply control submodule, for controlling the energy-storage units to export the first discharge power, pass sequentially through the Bidirectional variable-flow
Device, the bypass module give the first load supplying, so that power of first discharge power equal to the described first load, or with
First discharge power and transformer efficiency sum is set to be equal to the power of the described first load.
8. system as claimed in claim 6, it is characterised in that the other end of the transformer is also connected with the second load, institute
Stating control system also includes：
Second acquisition module, for obtaining the power of second load；
Second power control module, for being broken down when the inverter, and the transformer efficiency and the energy-storage units
Maximum discharge power sum be more than or equal to described first load power and it is described second load power sum when, control
The two way convertor is in inversion output state, and controls the energy-storage units to export the second discharge power, passes sequentially through institute
Two way convertor and the bypass module are stated to first load supplying, by the two way convertor to the described second load
Power supply.
9. system as claimed in claim 8, it is characterised in that second acquisition module includes：
Power detection submodule, for using power detection mode, detecting the described second power loaded.
10. the system as described in any one of claim 6 to 9, it is characterised in that also include：
Working Status Monitoring module, for monitoring the working condition of the inverter in real time；
Fault alarm module, for when the inverter breaks down, with predetermined manner alert.
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| EP4027485A1 (en) * | 2021-01-11 | 2022-07-13 | ABB Schweiz AG | Method for controlling an uninterruptable power supply |
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| WO2021114720A1 (en) * | 2019-12-13 | 2021-06-17 | 珠海格力电器股份有限公司 | Driving circuit and method, and frequency converter, device and computer-readable storage medium |
| EP4027485A1 (en) * | 2021-01-11 | 2022-07-13 | ABB Schweiz AG | Method for controlling an uninterruptable power supply |
| US11804731B2 (en) | 2021-01-11 | 2023-10-31 | Abb Schweiz Ag | Method for controlling an uninterruptable power supply |
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Address after: 361000 Ma Long Road 457, Torch Garden, Xiamen Torch High-tech Zone, Fujian Province Applicant after: Kehua Hengsheng Co., Ltd. Address before: 361000 torch garden, torch high tech Zone, Xiamen, Fujian 457 Applicant before: Xiamen Kehua Hengsheng Co., Ltd. |
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