Energy management strategy of hybrid energy storage system

A hybrid energy storage system and energy management technology, applied in the field of energy management strategy, can solve the problems of complex control logic of energy management strategy, not making full use of the complementary advantages of energy storage units, etc. Effect

Active Publication Date: 2016-08-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The purpose of the present invention is to address the shortcomings of the above-mentioned background technology, and to provide an energy management strategy for a hybrid energy storage system disclosed in the present invention. Under the premise of the external characteristics of

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  • Energy management strategy of hybrid energy storage system
  • Energy management strategy of hybrid energy storage system
  • Energy management strategy of hybrid energy storage system

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Embodiment Construction

[0030] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0031] Depend on figure 1 In the hybrid energy storage system shown, batteries and supercapacitors are used as energy storage units, which are respectively connected to the DC grid through bidirectional DC converters, and both respond to the charging and discharging requirements of the energy storage system together. The task of the energy management strategy is to coordinate the reasonable distribution of charging and discharging energy between the battery and the supercapacitor, protect the normal and stable operation of the energy storage unit, and enable the energy storage system to quickly and accurately respond to external charging and discharging requirements.

[0032] Batteries have high energy density, low power density, short cycle life, and low charge and discharge efficiency, so they are not suitable for high-power charge and discharge a...

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Abstract

The invention discloses an energy management strategy of a hybrid energy storage system, relates to an energy management strategy of a microgrid hybrid energy storage system, and belongs to the technical field of microgrid energy storage. The energy management strategy comprises the following three power distribution processes: firstly, pre-distributing a power of the energy storage system to a storage battery and a super capacitor under the premise of ensuring that the power of the hybrid energy storage system is invariable; then carrying out secondary power distribution on the basis of pre-distribution according to a power value flowing between the storage battery and the super capacitor; and finally carrying out final distribution by considering charge and discharge limitations and constraints of energy storage units on the basis of secondary distribution, and fully developing the characteristics of the energy storage units. Advantages complementation is formed among the energy storage units, so that the performance of the energy storage system is improved.

Description

technical field [0001] The invention discloses an energy management strategy of a hybrid energy storage system, relates to the energy management strategy of a microgrid hybrid energy storage system, and belongs to the technical field of microgrid energy storage. Background technique [0002] In order to avoid various problems caused by the large power grid, such as: when the power load of the large power grid increases, the increase in the capacity of the corresponding transmission line will lead to a decrease in the reliability of the power grid; Stability cannot be reliably guaranteed. The large power grid adopts centralized power generation, which is not flexible enough, power supply is difficult in remote areas, and the cost of power grid construction is high. Distributed power generation has been developed. Most of the energy sources of distributed power generation are clean and renewable energy such as solar energy and wind energy, which is conducive to environmental ...

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Application Information

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IPC IPC(8): H02J3/32H02J3/28
CPCH02J3/28H02J3/32
Inventor 高宇卜飞飞黄文新
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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