Frequency modulation energy storage system based on charging and discharging shunt control

A technology of energy storage system and management and control system, which is applied in the direction of AC network load balancing, reducing/preventing power oscillation, etc., and can solve problems affecting the efficiency and life of lithium battery energy storage systems

Pending Publication Date: 2020-08-18
周锡卫
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The operation characteristics of the battery energy storage system applied to the frequency modulation of the power grid (power plant) is that it needs to be charged and discharged frequently, and the average charge and disch

Method used

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  • Frequency modulation energy storage system based on charging and discharging shunt control
  • Frequency modulation energy storage system based on charging and discharging shunt control

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Embodiment Construction

[0018] As an implementation example, a frequency modulation energy storage system based on charge-discharge shunt control is described with reference to the accompanying drawings, however, the technology and solution of the present invention are not limited to the content given in this implementation example.

[0019] Such as figure 1 As shown, a frequency modulation energy storage system based on charging and discharging shunt control mainly includes: grid dispatching terminal (1), power grid (2), power line (3), charging energy storage subsystem (4), discharging energy storage subsystem ( 5), charging energy storage battery management system (6), discharging energy storage battery management system (7), energy storage management and control system (8), system communication line (9), AGC terminal (10), charging transformer (11), The discharge transformer (12), the power grid communication line (13), are characterized in that:

[0020] The energy storage system consists of th...

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Abstract

The invention belongs to the technical field of electrochemical energy storage application, and particularly relates to a frequency modulation energy storage system based on charging and discharging shunt control. An energy storage management and control system performs real-time monitoring and dynamic configuration adjustment, namely, an energy storage unit composed of three or more storage battery strings and an energy storage converter is divided into two energy storage subsystems, the energy storage management and control system receives a frequency modulation power instruction sent by thepower grid dispatching through an AGC terminal, and when the charged energy storage subsystem is fully charged or the discharging energy storage subsystem completely discharges, the energy storage management and control system is real-timely monitored and determined to carry out the dynamic configuration adjustment again, so that the charging and discharging continue to be carried out effectivelyand safely in a shunt manner. The charged energy storage subsystem is charged in the process from the completion of one dynamic configuration adjustment to the next dynamic configuration adjustment,and the discharging energy storage subsystem only discharges, so that the battery damage caused by the frequent charging and discharging conversion of an energy storage battery is greatly improved, the efficiency of the energy storage system is effectively improved, and the service life of the energy storage system is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage applications, and in particular relates to a frequency modulation energy storage system based on charge and discharge shunt control. Background technique [0002] The battery energy storage system has obvious advantages in participating in power grid frequency regulation, and has been sought after by the industry and widely used. The operation characteristics of the battery energy storage system applied to the frequency modulation of the power grid (power plant) is that it needs to be charged and discharged frequently, and the average charge and discharge can reach hundreds of times per day. This is a huge challenge for lithium batteries with limited charge and discharge times. , seriously affecting the efficiency and life of the lithium battery energy storage system. How to reduce the repeated charge and discharge times of lithium batteries is a key issue to improve the ef...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/28
CPCH02J3/24H02J3/28
Inventor 周锡卫
Owner 周锡卫
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