CN207765967U - Container-type energy storage DC side parallel operation control system - Google Patents
Container-type energy storage DC side parallel operation control system Download PDFInfo
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- CN207765967U CN207765967U CN201820258077.2U CN201820258077U CN207765967U CN 207765967 U CN207765967 U CN 207765967U CN 201820258077 U CN201820258077 U CN 201820258077U CN 207765967 U CN207765967 U CN 207765967U
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Abstract
This application discloses a kind of container-type energy storage DC side parallel operation control system, which includes the container-type energy storage terminal of multiple access power grids, and each energy storage terminal respectively includes：Power conversion system, exchange side access power grid, and DC side is connect with energy-storage units；Energy-storage units include at least accumulator, wherein, it is connected by a contactor between the DC side of the adjacent power conversion system, moreover, the control system further includes a controller, the controller is connected to all contactors, and the alternative control contactor break-make.When the utility model control system is based on the problem of appearance of one or several energy storage terminals cannot make full use of energy storage terminal in time, charge and discharge are carried out by the PCS of other energy storage terminals, control energy storage terminal that can be accurate, stable powers on initial Automatic Levelling weighing apparatus, balanced supply load, make full use of each energy storage terminal, balance charge/discharge reduces plant area's loss, increases economic efficiency.
Description
Technical field
This application involves intelligent power grid technology fields, more particularly to a kind of container-type energy storage DC side and machine control system
System.
Background technology
It is respectively to be incorporated into power grid that Nowadays, Container shipping energy-storage system is mostly in being connected to the grid, and is realized and is handed over by bidirectional converter
Direct current energy converts and power flow control, and is incorporated to 10kV electricity by user terminal switchgear house step-up transformer (400V/10kV)
Net.But the container between each plant area and more than one container energy-storage system, it is mutual independence between them, between
The capacity of load imbalance, battery is also unbalanced.This occurs as soon as a problem：If one of them or several container energy storage
PCS goes wrong in system or the other reasons such as battery system Power unbalance and load imbalance cannot make full use of collection
Vanning energy-storage system.Entire plant area's container energy-storage system total tune and further flexibility cannot thus be played.
Utility model content
The purpose of this utility model is to provide a kind of container-type energy storage DC side parallel operation control systems, realize to many places
Container energy storage terminal balance charge/discharge, keeps container energy-storage system more flexible, more convenient.
To achieve the above object, the utility model provides the following technical solutions：
The embodiment of the present application discloses a kind of container-type energy storage DC side parallel operation control system, including multiple access power grids
Container-type energy storage terminal, each energy storage terminal respectively include：
Power conversion system, exchange side access power grid, and DC side is connect with energy-storage units；
Energy-storage units include at least accumulator,
Wherein,
It is connected by a contactor between the DC side of the adjacent power conversion system,
Moreover,
The control system further includes a controller, which is connected to all contactors, and may be selected
Property the control contactor break-make.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, described in controller selectively control
Contactor break-make, to realize the electric quantity balancing of each energy-storage units.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, in one or more first energy storage
Unit can not normal charge and discharge when, the power conversion system of other one or more energy storage terminals is connected to first energy-storage units simultaneously
Control its charge and discharge.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, the first energy-storage units without
The normal charge and discharge of method include at least one kind in following situations：
A, the corresponding power conversion system of first energy-storage units breaks down and can not be normally energy-storage units charge and discharge；
B, the electricity between different energy-storage units is unbalanced；
C, the power supply respectively loaded is unbalanced.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, in the same energy storage terminal
It is interior, a switch is provided between power conversion system and corresponding energy-storage units.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, the controller turns with each power
Communication connects between changing system.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, the friendship of the power conversion system
Stream side is directly connected into power grid or is connected into power grid by isolating transformer.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, multiple power converter sections
Exchange side is same load supplying after connecing altogether.
Preferably, in above-mentioned container-type energy storage DC side parallel operation control system, the energy-storage units further include using
To monitor the battery management system of accumulator status, connection is communicated between the controller and each battery management system.
Compared with prior art, the utility model has the advantage of：The utility model control system is based on one or several
A container energy storage terminal occur PCS go wrong, the other reasons such as battery system Power unbalance and load imbalance not
When can make full use of energy storage terminal in time, charge and discharge are carried out by the PCS of other energy storage terminals, it can accurate, stabilization control
Energy storage terminal powers on initial Automatic Levelling weighing apparatus, and balanced supply load makes full use of each energy storage terminal, balance charge/discharge to subtract
Few plant area's loss, increases economic efficiency.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 show the principle side of container-type energy storage DC side parallel operation control system in the utility model specific embodiment
Block diagram；
Fig. 2 show the flow of container-type energy storage DC side and machine control method in the utility model specific embodiment and shows
It is intended to.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality
Novel protected range.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
In conjunction with shown in Fig. 1, the present embodiment provides a kind of container-type energy storage DC side parallel operation control system, including multiple connect
Enter the container-type energy storage terminal 50 of power grid 10, each energy storage terminal respectively includes power conversion system (PCS) 51 and storage
Energy unit 52, its exchange side of PCS access power grid 10, and DC side is connect with energy-storage units.Energy-storage units include at least accumulator.
Particularly, it is connected by a contactor 60 between the DC side of the adjacent power conversion system.
Further, control system further includes a controller 70, which is connected to all contactors, and
Alternative controls the contactor break-make.
Further, controller selectively controls the contactor break-make, to realize the electric quantity balancing of each energy-storage units.
Specifically, one or more first energy-storage units can not normal charge and discharge when, other one or more energy storage are whole
The power conversion system at end is connected to first energy-storage units and controls its charge and discharge.
The first energy-storage units normally charge and discharge can not include at least one kind in following situations：
A, the corresponding power conversion system of first energy-storage units breaks down and can not be normally energy-storage units charge and discharge；
B, the electricity between different energy-storage units is unbalanced；
C, the power supply respectively loaded is unbalanced.
In the technical solution, PCS is set, PCS is responsible for the conversion of energy, can from power grid by isolating transformer energy
It is filled into accumulator, referred to as charges, energy can also be fed back to by isolating transformer in power grid from accumulator, referred to as
Electric discharge.
In one embodiment, in the same energy storage terminal, between power conversion system and corresponding energy-storage units
It is provided with a switch 53.
In one embodiment, connection is communicated between controller and each power conversion system.
In one embodiment, the exchange side of power conversion system is directly connected into power grid or is connected into electricity by isolating transformer 30
Net.
In the technical solution, power grid can be the national grid of 10kv, can also be by solar cell, wind power generation etc.
From a group power grid.
In one embodiment, it is 40 power supply of same load after the exchange side of multiple power converter sections connects altogether.
In one embodiment, then the exchange side of each two power converter section is connect altogether as 40 power supply of load.
In one embodiment, energy-storage units further include the battery management system (BMS) for monitoring accumulator status, described
Connection is communicated between controller and each battery management system.
Battery management system (BMS) is that the unit of management of battery is for monitoring, assessing and protecting battery operation shape
The electronic equipment set of state can effectively monitor the various states (voltage, electric current, temperature, SOC, SOH etc.) of battery, can be to storing
Charging, discharging electric batteries process carries out safety management, carries out alarm to the failure that accumulator is likely to occur and emergency protection is handled, to storing
The operation of battery optimizes control, ensures storage battery safety, reliable, stable operation.BMS systems are can not in energy-storage system
The important component lacked, be energy-storage system effectively, the guarantee of reliability service, should have monitoring function, operation alarm work(
Energy, defencive function, self-diagnostic function, balanced management function, parameter management function and local runtime status display function etc..
Generally, the information such as the data acquisition, data processing of accumulator, state analysis, fault warning and treating capacity are big, answer
It is completed by BMS；The functions such as monitoring, control protection, the alarm of battery pack and battery pile can be completed by PCS.
In one embodiment, the accumulator includes lithium battery.
Preferably, the lithium battery is ferric phosphate lithium cell.
Accumulator is composed in series by several battery modules, and each battery module is by several battery cell parallel connection structures
At battery cell uses ferric phosphate lithium cell, and LiFePO4 is used as the preferred material of large-capacity power energy-storage battery, in synthesis
Performance, safety, cost, environmental protection, technical maturity etc. are satisfied by demand, therefore in a preferred embodiment, select ferric phosphate
Lithium battery (LiFePO4, abbreviation LFP) and it is used as energy storage carrier.
In an Application Example, in the same plant area, (industrial production plant area, can for multiple energy storage terminals setting
Think a company, or an industry park can also be a specific region of delineation).
In conjunction with shown in Fig. 2, the present embodiment additionally provides a kind of container-type energy storage DC side and machine control method, including：
When s1, initial power-on, the one or more contactor break-makes of controller selectively control reach the electricity of each energy-storage units
Amount is balanced (the direct electricity of energy-storage units of each energy storage terminal is accomplished unanimously)；
S2, after each energy-storage units electric quantity balancing, keep all contactors to be closed, to each energy-storage units balance charge/discharge.
In conjunction with shown in Fig. 1, in a concrete case, there are 6 energy storage terminal DC sides and machine control：
(1), every by the break-make of A.C. contactor at 5 at control DC side and machine, and control in initial power-on
The energy-storage units that a PCS charge and discharge reach energy storage terminal in parallel are balanced.
(2), after each energy-storage units reach equilibrium, contactor normally closed conjunction always makes battery balanced charge and discharge.
(3) if, the A.C. contactor at wherein one be disconnected, by the auxiliary contact of contactor feed back to controller come
It detects contactor to disconnect, disconnects again balance-seeking and be closed contactor.
In conclusion the advantages of the utility model, includes at least：
1, it is convenient for safeguarding, repair：If PCS is damaged at one, other pcs can also give its battery system charge and discharge.
2, cost-effective, it increases economic efficiency：Container energy storage terminal originally peak load shifting, increases economic efficiency,
But if wherein primary unbalanced with a few place's battery system charge and discharge, load imbalance, this results in loading big, energy storage system
Unite not enough, load small, energy-storage system cannots be used up, this case by DC side and machine can balance charge/discharge, improve through
Ji benefit.
3, the harmony of the operation stability and battery system of system entirety is improved.
4, this system DC side and machine are controlled is controlled using A.C. contactor, has saved R＆D costs.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should
Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (8)
1. a kind of container-type energy storage DC side parallel operation control system, which is characterized in that include the container of multiple access power grids
Formula energy storage terminal, each energy storage terminal respectively include：
Power conversion system, exchange side access power grid, and DC side is connect with energy-storage units；
Energy-storage units include at least accumulator,
Wherein,
It is connected by a contactor between the DC side of the adjacent power conversion system,
Moreover,
The control system further includes a controller, which is connected to all contactors, and alternative control
Make the contactor break-make.
2. container-type energy storage DC side parallel operation control system according to claim 1, which is characterized in that controller selects
Property the control contactor break-make, to realize the electric quantity balancing of each energy-storage units.
3. container-type energy storage DC side parallel operation control system according to claim 2, which is characterized in that at one or more
A first energy-storage units can not normal charge and discharge when, the power conversion system of other one or more energy storage terminals is connected to first
Energy-storage units simultaneously control its charge and discharge.
4. container-type energy storage DC side parallel operation control system according to claim 1, which is characterized in that in the same institute
It states in energy storage terminal, a switch is provided between power conversion system and corresponding energy-storage units.
5. container-type energy storage DC side parallel operation control system according to claim 1, which is characterized in that the controller
Connection is communicated between each power conversion system.
6. container-type energy storage DC side parallel operation control system according to claim 1, which is characterized in that the power turns
The exchange side for changing system is directly connected into power grid or is connected into power grid by isolating transformer.
7. container-type energy storage DC side parallel operation control system according to claim 1, which is characterized in that multiple work(
The exchange side of rate converter section is same load supplying after connecing altogether.
8. container-type energy storage DC side parallel operation control system according to claim 1, which is characterized in that the energy storage list
Member further includes monitoring the battery management system of accumulator status, the company of communicating between the controller and each battery management system
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820258077.2U CN207765967U (en) | 2018-02-13 | 2018-02-13 | Container-type energy storage DC side parallel operation control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820258077.2U CN207765967U (en) | 2018-02-13 | 2018-02-13 | Container-type energy storage DC side parallel operation control system |
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| CN207765967U true CN207765967U (en) | 2018-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599209A (en) * | 2018-02-13 | 2018-09-28 | 江苏博强新能源科技股份有限公司 | Container-type energy storage DC side parallel operation control system and method |
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2018
- 2018-02-13 CN CN201820258077.2U patent/CN207765967U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599209A (en) * | 2018-02-13 | 2018-09-28 | 江苏博强新能源科技股份有限公司 | Container-type energy storage DC side parallel operation control system and method |
| CN108599209B (en) * | 2018-02-13 | 2024-01-09 | 江苏博强新能源科技股份有限公司 | Container type energy storage direct current side parallel operation control system and method |
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