Control method and system for coordinating combined operation of multiple independent energy storage power stations

A technology of energy storage power station and control method, applied in the direction of electrical components, circuit devices, AC network circuits, etc., to achieve the effect of maintaining flexibility

Pending Publication Date: 2021-07-13
GUANGDONG YUEDIAN YUNHE POWER GENERATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The purpose of the present invention is to provide a control method and system for coordinating the joint operation of multiple independent energy storage power stations, aiming to solve the problem that multiple independent energy storage power stations need to be connected to the same unit for joint operation after energy storage expansion

Method used

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  • Control method and system for coordinating combined operation of multiple independent energy storage power stations
  • Control method and system for coordinating combined operation of multiple independent energy storage power stations
  • Control method and system for coordinating combined operation of multiple independent energy storage power stations

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Embodiment 1

[0053] Such as Figure 3 to Figure 5 As shown, this embodiment provides a control method for coordinating the joint operation of multiple independent energy storage power stations. The unit DCS is used to realize the joint operation of multiple independent energy storage power stations. Uploading, simulating multiple independent energy storage power stations into a "virtual power station", assisting the same unit as a whole to respond to AGC load scheduling instructions, and feeding back key operating data of energy storage as a whole, the method specifically includes:

[0054] The DCS of the unit distributes the AGC instructions issued by the dispatcher according to the operating conditions of the energy storage power station:

[0055] When the energy storage performance of each energy storage power station is equivalent and the initial electricity is close, the proportion of energy storage output is determined according to the ratio of energy storage capacity. The larger the e...

Embodiment 2

[0099] This embodiment provides a control system for coordinating joint operation of multiple independent energy storage power stations, including a unit DCS and multiple energy storage EMSs.

[0100] The DCS of the unit is used to distribute the AGC commands issued by the dispatcher according to the operating conditions of the energy storage power station, and to synthesize the feedback signals of multiple independent energy storage power stations, and to feed back the energy storage signal to the dispatcher as a whole;

[0101] Energy storage EMS, independently configured in each energy storage power station, is used to receive the AGC command assigned by the unit DCS, and feed back the output and status signals of the energy storage power station to the unit DCS.

[0102] Among them, the unit DCS distributes the AGC instructions issued by the dispatcher according to the operating conditions of the energy storage power station:

[0103] When the energy storage performance of...

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Abstract

The invention discloses a control method for coordinating the combined operation of multiple independent energy storage power stations, and the method comprises the steps of enabling a unit DCS to distribute the AGC instructions issued by a dispatcher according to the operation conditions of the energy storage power stations, synthesizing the feedback signals of the multiple independent energy storage power stations, and feeding back an energy storage signal to the dispatcher as a whole; when the energy storage performances of the energy storage power stations are equivalent and the initial electric quantities are close to each other, determining an energy storage output proportion according to an energy storage capacity proportion; when the energy storage performances of the energy storage power stations are different or the initial electric quantity difference is larger, determining the energy storage output proportion according to the energy storage available power proportion; and when the output of any energy storage power station is limited due to a fault, setting the energy storage output proportion manually through the unit DCS. The invention also discloses a control system for coordinating the combined operation of the plurality of independent energy storage power stations. According to the present invention, transverse connection between the energy storage power stations is not needed, brand and product type limitation on the newly-added energy storage power stations is avoided, and continuous expansion is easy.

Description

technical field [0001] The invention relates to the technical field of power grid AGC frequency modulation, in particular to a control method and system for coordinating the joint operation of multiple independent energy storage power stations. Background technique [0002] With the large-scale production of green energy such as wind power and photovoltaics, the power grid’s demand for system frequency regulation resources continues to increase, and the combination of thermal power plants with electrochemical energy storage is an important means of secondary frequency regulation. Its basic working principle is as follows: figure 1 Shown: [0003] The power grid sends the AGC command to the DCS of the thermal power plant unit, and the DCS forwards the AGC command and the current output value of the unit to the energy storage EMS (Energy Management System), and the energy storage EMS controls the output of the energy storage system to compensate for the deviation between the A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/46H02J3/24
CPCH02J3/32H02J3/241H02J3/466
Inventor 吴润刘赞伟钟伟辉冯海棠米辉蓝志勇莫宗胜万彪慕容永坚覃银清凌梓淇李众黄杰李文杰余金强
Owner GUANGDONG YUEDIAN YUNHE POWER GENERATION
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