CN105140946A - Lithium ion battery energy storage power station - Google Patents
Lithium ion battery energy storage power station Download PDFInfo
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- CN105140946A CN105140946A CN201510553939.5A CN201510553939A CN105140946A CN 105140946 A CN105140946 A CN 105140946A CN 201510553939 A CN201510553939 A CN 201510553939A CN 105140946 A CN105140946 A CN 105140946A
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- ion battery
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Abstract
The invention discloses a lithium ion battery energy storage power station comprising a plurality of energy storage sets which are connected in parallel through a low-voltage bus, low-voltage protective devices connected in series with the plurality of energy storage sets connected in parallel, voltage transformation devices with primary sides connected in series with the low-voltage protective devices; and medium-voltage protective devices with one ends connected with the secondary sides of the voltage transformation devices and with the other ends connected with a high-voltage bus. By means of reasonable topology, the lithium ion battery energy storage power station prevents uncontrollable loop circulation caused by direct parallel connection of a battery pack, and achieves quick response at a millisecond level in order to deal with voltage disturbance.
Description
Technical field
The present invention relates to a kind of DC power supply power station, particularly a kind of lithium ion battery energy-accumulating power station.
Background technology
In MW class energy-accumulating power station, battery cell quantity is up to more than 30,000 joints, need by series and parallel mode in groups, inevitably there is circulation and discharge and recharge unbalanced phenomena, long-time running will reduce battery performance, life-span and fail safe greatly, thus impact is to the stability of electrical network input electric energy, impact transmission of electricity quality.
Summary of the invention
The object of this invention is to provide a kind of lithium ion battery energy-accumulating power station, by adopting rational topology, avoiding the battery pack directly uncontrollable circulation problem caused in parallel, and Millisecond can be realized respond fast, reply voltage disturbance.
In order to realize above object, the present invention is achieved by the following technical solutions:
A kind of lithium ion battery energy-accumulating power station, comprises:
Some groups of energy storage units, some groups of described energy storage units are connected by low-voltage bus bar parallel connection;
Low-voltage protection device, described low-voltage protection device and some groups of energy storage units connected in series in parallel;
Potential device, the primary side of described potential device is connected with low-voltage protection device;
Middle pressure protective device, described middle one end of pressure protective device is connected with the secondary side of potential device, and the other end is connected to high voltage bus.
Described energy storage unit is grouping access type energy storage unit.
Described grouping access type energy storage unit comprises:
Some groups of straight modules, the straight module of described often group comprises the array and DC chopper that are connected in series, and described some groups straight modules are connected by DC bus;
Several orthogonal modules, the two ends of some groups of described orthogonal modules are connected with ac bus with DC bus respectively.
The DC input voitage scope of described grouping access type energy storage unit reaches 300 ~ 800V.
Described orthogonal module is inverter.
Described grouping access type energy storage unit comprises some groups: the array be connected in series and orthogonal module, and the described orthogonal module often organized is connected by ac bus.
The DC input voitage scope of described grouping access type energy storage unit reaches 300 ~ 800V.
The present invention compared with prior art, has the following advantages:
By adopting rational topology, avoid the battery pack directly uncontrollable circulation problem caused in parallel, and Millisecond can be realized respond fast, reply voltage disturbance.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of lithium ion battery energy-accumulating power station of the present invention;
Fig. 2 is the main circuit topology figure of the stage type energy storage unit of lithium ion battery energy-accumulating power station of the present invention;
Fig. 3 is the main circuit topology figure of the single stage type energy storage unit of lithium ion battery energy-accumulating power station of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
A kind of lithium ion battery energy-accumulating power station, as shown in Figure 1, comprises: some groups of energy storage units 1, low-voltage protection device 2, potential device 3, middle pressure protective devices 4, and wherein, some groups of energy storage units 1 are connected by low-voltage bus bar 5 parallel connection; Low-voltage protection device 2 is connected with some groups of energy storage units 1 in parallel; The primary side of potential device 3 is connected with low-voltage protection device 2; One end of middle pressure protective device 4 is connected with the secondary side of potential device 3, and the other end is connected to high voltage bus 6.In the present invention; low-voltage protection device 2 selects low-tension switch cabinet; Medium Voltage Switchgear selected by middle pressure protective device 4; potential device 3 for capacity be the two winding transformer of 1250kVA; energy-accumulating power station is grouping access type energy-accumulating power station; be divided into stage type and single stage type energy-accumulating power station, specifically refer to following two embodiments respectively.
One of embodiment:
The present embodiment adopts stage type energy storage unit, namely separate unit 500kW energy-accumulating power station forms by organizing small-power module more, a set of system control cpu is adopted to realize the cooperation control of intermodule, avoid the battery pack directly uncontrollable circulation problem caused in parallel, and Millisecond can be realized respond fast, reply voltage disturbance, its main circuit topology figure, as shown in Figure 2, this grouping access type energy storage unit comprises: some groups of straight modules, several orthogonal modules 12, in the present embodiment, comprise 12 groups of straight modules, 2 orthogonal modules 12, wherein, often the straight module of group comprises the array 111 and DC chopper 112 that are connected in series, some groups of straight modules are connected by DC bus 7, the two ends of some groups of orthogonal modules 12 are connected with ac bus 8 with DC bus 7 respectively, and orthogonal module 12 adopts DC/AC module and inverter.In the present embodiment, the DC input voitage scope of grouping access type energy storage unit reaches 300 ~ 800V.
Embodiment two:
The present embodiment adopts single stage type energy storage unit, and namely separate unit 500kW energy-accumulating power station is made up of multiple DC/AC module, each modular power 86kW, as shown in Figure 3.Grouping access type energy storage unit comprises some groups: the array 13 be connected in series and orthogonal module 14, the orthogonal module 14 often organized is connected by ac bus 8, in the present embodiment, each battery set charge/discharge electric current can control separately, and can control flexibly according to battery pack state-of-charge (SOC), thus effectively avoid circulation between battery pack.
In the present embodiment, the DC input voitage scope of grouping access type energy storage unit reaches 300 ~ 800V.Orthogonal module 12 adopts inverter.
In sum, lithium ion battery energy-accumulating power station of the present invention, by adopting rational topology, avoids the battery pack directly uncontrollable circulation problem caused in parallel, and can realize Millisecond and respond fast, reply voltage disturbance.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. a lithium ion battery energy-accumulating power station, is characterized in that, comprises:
Some groups of energy storage units (1), some groups of described energy storage units (1) are connected by low-voltage bus bar (5) parallel connection;
Low-voltage protection device (2), described low-voltage protection device (2) is connected with some groups of energy storage units (1) in parallel;
Potential device (3), the primary side of described potential device (3) is connected with low-voltage protection device (2);
Middle pressure protective device (4), one end of described middle pressure protective device (4) is connected with the secondary side of potential device (3), and the other end is connected to high voltage bus (6).
2. lithium ion battery energy-accumulating power station as claimed in claim 1, is characterized in that, described energy storage unit (1) is grouping access type energy storage unit.
3. lithium ion battery energy-accumulating power station as claimed in claim 2, it is characterized in that, described grouping access type energy storage unit comprises:
Some groups of straight modules, the straight module of described often group comprises the array (111) and DC chopper (112) that are connected in series, and described some groups straight modules are connected by DC bus (7);
Several orthogonal modules (12), the two ends of some groups of described orthogonal modules (12) are connected with ac bus (8) with DC bus (7) respectively.
4. lithium ion battery energy-accumulating power station as claimed in claim 3, it is characterized in that, the DC input voitage scope of described grouping access type energy storage unit reaches 300 ~ 800V.
5. lithium ion battery energy-accumulating power station as claimed in claim 3, it is characterized in that, described orthogonal module (12) is inverter.
6. lithium ion battery energy-accumulating power station as claimed in claim 2, it is characterized in that, described grouping access type energy storage unit comprises some groups: the array (13) be connected in series and orthogonal module (14), and the described orthogonal module (14) often organized is connected by ac bus (8).
7. lithium ion battery energy-accumulating power station as claimed in claim 6, it is characterized in that, the DC input voitage scope of described grouping access type energy storage unit reaches 300 ~ 800V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510553939.5A CN105140946A (en) | 2015-09-02 | 2015-09-02 | Lithium ion battery energy storage power station |
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| CN201510553939.5A CN105140946A (en) | 2015-09-02 | 2015-09-02 | Lithium ion battery energy storage power station |
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| CN105140946A true CN105140946A (en) | 2015-12-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022017534A1 (en) * | 2020-07-24 | 2022-01-27 | 中国华能集团清洁能源技术研究院有限公司 | Distributed battery energy storage system capable of single-stage conversion |
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Effective date of registration: 20151216 Address after: 200002 Nanjing East Road, Shanghai, No. 181, No. Applicant after: State Grid Shanghai Municipal Electric Power Company Applicant after: East China Electric Power Test & Research Institute Co., Ltd. Address before: 200002 Nanjing East Road, Shanghai, No. 181, No. Applicant before: State Grid Shanghai Municipal Electric Power Company |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151209 |
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| RJ01 | Rejection of invention patent application after publication |