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A new type of battery energy storage system and its functional integration design method

A battery energy storage system and battery management system technology, applied in flexible AC transmission systems, information technology support systems, electrical components, etc., can solve the problems of energy storage system function loss, reliability reduction, cost increase, etc., to improve response The effect of speed and efficiency of use, improved reliability, and improved operational efficiency

Active Publication Date: 2016-04-20
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the functional requirements and collaborative execution of the components of the battery energy storage system have not been clearly defined, resulting in problems such as lack of function or redundancy, reduced reliability, reduced efficiency, and increased costs in the energy storage system.

Method used

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  • A new type of battery energy storage system and its functional integration design method
  • A new type of battery energy storage system and its functional integration design method
  • A new type of battery energy storage system and its functional integration design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0109] Embodiment 1: Functional integration design of branch-type battery energy storage system

[0110] The branch-type battery energy storage system can be applied to community energy storage, building energy storage, backup power supply, distribution network peak shaving and valley filling, microgrid main power supply, distributed power supply access, etc.; such as figure 2 shown, figure 2 This is the structure diagram of the branch-type battery energy storage system; the branch-type battery energy storage system consists of one energy storage unit, including the battery management system BMS, the energy storage battery EB and the energy storage converter PCS.

[0111] Because the structure of the branch-type battery energy storage system is simple and the amount of monitoring information is small, part of the functions of the BMS and the functions of the EMS are integrated into the PCS.

[0112] 1. BMS realizes the following functions

[0113] 1) Analog measurement fun...

Embodiment approach 2

[0128] Embodiment 2: Functional integration design of loop-type battery energy storage system

[0129] The loop-type battery energy storage system consists of several energy storage units in parallel, which can be connected to the medium-voltage power grid through a booster transformer, and unified management and control through the energy storage circuit monitoring system, such as image 3 shown, image 3 It is the structure diagram of the loop-type battery energy storage system; it can be applied to peak shaving and valley filling at the distribution network / substation side, distributed energy access, etc.

[0130] The loop-type battery energy storage system includes multiple energy storage units, which can integrate the monitoring, management, control functions of the battery pack in the BMS and the basic SCADA functions of the monitoring system into the PCS, and provide advanced analysis and unified control of different energy storage units. The function is still done by ...

Embodiment approach 3

[0149]Embodiment 3: Functional integration design of power station-type battery energy storage system

[0150] The power station-type battery energy storage system is converged through the high-voltage bus, and can be boosted again and connected to the energy storage system operating at a higher voltage level, such as Figure 4 shown, Figure 4 It is the structure diagram of the power station type battery energy storage system; it can be applied to substation peak shaving, power grid system frequency regulation and renewable energy access, etc.

[0151] The power station-type battery energy storage system includes multiple parallel circuits and multiple energy storage units, with a large amount of information and complex control, and should still maintain hierarchical management and control. BMS is responsible for the monitoring, management, control and protection of battery packs and battery cells, PCS is responsible for charge and discharge control, various protections on t...

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Abstract

The invention provides a novel battery energy-storage system and a function integration designing method thereof. The system comprises an energy storage unit and an EMS (energy storage monitoring system); the energy storage unit comprises an EB (energy storage battery unit), an BMS (battery management system) and a PCS (power storage current transformer); the EB is connected with the BMS, the BMS is respectively connected with the EB and the PCS, the input end of the EMS is connected with the output end of the BMS, and the PCS and the EMS are communicated with each other. The method comprises an energy storage battery monitoring and analyzing method achieved through the BMS and the PCS and an energy-storage system monitoring and analyzing method achieved through the PCS and the EMS. In the battery energy-storage system function integration design provided by the invention, all large application occasions of electric power systems are covered, the objective is clear, and various requirements and applications are met.

Description

technical field [0001] The invention relates to a method in the technical field of electric power storage, in particular to a novel battery energy storage system and a method for the integrated design of its functions. Background technique [0002] The battery energy storage system consists of energy storage battery pack EB, battery management system BMS, energy storage converter PCS and energy storage monitoring system EMS, with energy storage unit as the smallest unit. According to the power and capacity of the energy storage system, the battery energy storage system can be divided into three categories: branch type, loop type and power station type. The BMS, PCS and EMS in the battery energy storage system should be configured and analyzed according to the specific requirements, so as to achieve different application goals. [0003] With the application of battery energy storage systems in the power industry and the construction of demonstration projects, a consensus has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J13/00
CPCY02B90/20Y02E40/10Y04S20/12
Inventor 薛金花叶季蕾杨波张祥文汪春尹亮黄鸣宇刘海涛
Owner STATE GRID CORP OF CHINA
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