Embedded energy storage system
An energy storage system and embedded technology, which is applied to systems for storing electrical energy, load balancing of AC networks, electric vehicles, etc., can solve the complicated operation and maintenance of transformers in the later stage, increase the volume and cost of energy storage systems, and limit the capacity of energy storage systems. Can not wait for the problem, to achieve the effect of flexible and free expansion of the device, save the volume of the transformer, and reduce the difficulty of installation, operation and maintenance
Inactive Publication Date: 2021-07-23
SOUTHEAST UNIV
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Problems solved by technology
[0003] At present, the energy storage inverter and the energy storage battery of the conventional energy storage system need to be separated into cabinets and placed independently, resulting in the energy storage system occupying a large area. At the same time, it is necessary to use a long distance and expensive high-voltage cables between the two. The connection not only greatly increases the size and cost of the device, but also brings great inconvenience to on-site installation, commissioning, and later operation and maintenance. In addition, the centralized AC filter used in the conventional energy storage system also causes energy storage system One of the bulky factors
[0004] At present, conventional medium and high voltage energy storage converters need to be connected to the power grid in the form of a transformer step-up, which not only brings additional losses, but also increases the volume and cost of the energy storage system. At the same time, the post-operation and maintenance of the transformer is also relatively complicated. , In addition, the capacity of this type of energy storage system is limited and cannot be flexibly adjusted according to the needs of the site. Therefore, the present invention proposes an embedded energy storage system
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0028] Such as figure 1 , an embedded energy storage system, including a power unit 101, a soft-start resistor 102, a main contactor 103, a starting contactor 104, a lightning arrester 105, an isolating switch 106 and an AC grid 107;
[0029] Wherein, the output end of the power unit 101 is connected with the input end of the soft start resistor 102 and the output end of the main contactor 103 . The output end of the soft start resistor 102 is connected to the input end of the start contactor 104, the output end of the start contactor 104 is connected to the output end of the main contactor 103 and then connected to the input end of the isolation switch 106, and the ...
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The invention relates to the technical field of power grid energy storage, and especially relates to an embedded energy storage system. The system comprises a power unit, the power unit comprises a direct-current filter inductor, a direct-current supporting capacitor, a DC / AC inverter and a distributed alternating-current filter inductor, the output end of the direct-current filter inductor is connected with the input end of the direct-current supporting capacitor, the direct-current supporting capacitor is connected in parallel to the direct-current side of the DC / AC inverter, and the output end of the DC / AC inverter is connected with the input end of the distributed direct-current filter inductor. According to the embedded energy storage system, the energy storage converter which originally needs to be independently placed is embedded into the top end of the energy storage battery rack, so that extra space for placing the energy storage converter is not needed, and the size of the device is greatly reduced; and meanwhile, the original centralized alternating current filter inductors are also distributed in the power units, so the size of the device is further reduced, the manufacturing cost and the installation, operation and maintenance difficulty of the system are remarkably reduced, and the device has the advantages of high efficiency, large capacity and low cost.
Description
technical field [0001] The invention relates to the technical field of grid energy storage, in particular to an embedded energy storage system. Background technique [0002] Facing the rapidly growing energy demand and the huge challenge of global energy conservation and emission reduction, vigorously developing grid energy storage technology has become an inevitable choice, and it is also the development trend of smart distribution network. Therefore, the power density, production cost, installation The requirements for transportation costs and post-operation and maintenance costs are getting higher and higher, which requires optimizing the design of the energy storage system structure, increasing the power density of the device, and reducing the manufacturing cost of the device. [0003] At present, the energy storage inverter and the energy storage battery of the conventional energy storage system need to be separated into cabinets and placed independently, resulting in t...
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IPC IPC(8): H02J3/32H02J7/00H02J7/02H02J15/00
CPCH02J3/32H02J15/00H02J7/0042H02J7/02H02J7/0068H02J7/0013
Inventor 王宝安陆扬万杰星
Owner SOUTHEAST UNIV