Energy storage subsystem used for batch-type renewable energy source power generation system and control method of energy storage subsystem

A technology for renewable energy and power generation systems, applied in collectors, electric vehicles, electrical components, etc., can solve the problems of increased construction costs, waste, and increased overall capacity of the energy storage system, and achieve the effect of avoiding overcharging and overdischarging

Active Publication Date: 2014-07-02
HARBIN ENG UNIV
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  • Application Information

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Problems solved by technology

However, in order to meet the purpose of protecting the battery, this patent largely sacrifices the overall performance of the energy storage system
Its control strategy can only realize charging and discharging of a single set of batteries at a certain mom

Method used

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  • Energy storage subsystem used for batch-type renewable energy source power generation system and control method of energy storage subsystem
  • Energy storage subsystem used for batch-type renewable energy source power generation system and control method of energy storage subsystem
  • Energy storage subsystem used for batch-type renewable energy source power generation system and control method of energy storage subsystem

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Embodiment Construction

[0034] Attached below Figure 1-3 The present invention is further described.

[0035] Aiming at the shortcomings of the existing energy storage subsystems serving intermittent renewable energy power generation systems, the present invention proposes a system structure of large-scale energy storage systems in grouped working mode, and proposes a brand-new control strategy for it, It can flexibly control the working state of the group battery system, and realize charging or discharging multiple battery groups at the same time. In this way, all batteries can be fully utilized to complete the instantaneous power balance between intermittent new energy power generation and electric loads, maximize energy utilization, avoid idle waste of battery packs, and effectively protect battery performance and prolong its use. life. The implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings. In addition to this implement...

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Abstract

The invention belongs to the field of energy storage of electric system micro-grids, and particularly relates to an energy storage subsystem used for a batch-type renewable energy source power generation system and a control method of the energy storage subsystem. The energy storage subsystem used for the batch-type renewable energy source power generation system comprises independent storage batteries, bidirectional DC power conversion devices, a storage battery charging and discharging controller, a storage battery state monitor device, an energy storage system concentrated control device and a connection line. By the utilization of all the storage batteries, instantaneous power balance between the batch-type new energy resource power generation and electric loads is finished, the utilization rate of resources is improved to the maximum extent, the idle waste of the storage batteries is avoided, the performance of the storage batteries is effectively protected, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the field of energy storage of a power system micro-grid, and in particular relates to an energy storage subsystem of an energy storage system in a micro-grid for an intermittent renewable energy power generation system and a control method thereof. Background technique [0002] New energy power generation equipment such as wind and light has the characteristics of intermittent and random power generation. In order to meet the continuous and stable power supply needs of such high-permeability systems, energy storage equipment must be equipped. Under the current technical conditions, large-capacity energy storage is still dominated by lead-acid batteries. However, during the use of lead-acid batteries, if the control strategy is not appropriate, the service life of the battery will be significantly shortened, and the energy storage capacity should be greatly reduced. However, the intermittent, distributed and random power gener...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J3/28
Inventor 刘宏达曲圣越马忠丽周磊申乃军张斌范伟远张强程鹏白立鹏
Owner HARBIN ENG UNIV
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