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A method and system for controlling output of an energy storage system

A technology of an energy storage system and a control method, which is applied in the energy storage system output control method and system field, can solve the problems of low control reliability and single composition of the energy storage system, and achieve reduced grid connection costs, high power supply stability, and Eliminate the effect of output fluctuations

Active Publication Date: 2022-04-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing energy storage system and its control method adopt a single energy storage system, and the cooperation between the energy storage system and wind power only considers the effects of the two on the power grid's peak-shaving and valley-filling, and the control reliability is low.

Method used

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  • A method and system for controlling output of an energy storage system
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  • A method and system for controlling output of an energy storage system

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] figure 1 It is a method flowchart of an embodiment of the energy storage system output control method of the present invention.

[0050] see figure 1 , the energy storage system output control method, inc...

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Abstract

The invention discloses an energy storage system output control method and system. The method includes: obtaining the actual output value of the wind power system; when the actual output value of the wind power system is higher than the wind power output threshold, adjusting the pumped storage unit to the power generation working state; according to the overall income of the wind power system and the pumped storage system and the pumped storage unit Adjust the output of the pumped storage unit according to the system parameters; judge whether the output fluctuation value of the wind power system is within the preset threshold range; when the output fluctuation value of the wind power system exceeds the preset threshold range, adjust the battery pack to the power generation working state ; Adjust the output of the pumped storage unit and the output of the storage battery according to the overall income of the wind power system and the pumped storage system, the system parameters of the pumped storage unit and the battery pack, and the fluctuation value of the output of the wind power system. The control method and system disclosed in the invention can improve grid-connected stability and power supply reliability.

Description

technical field [0001] The invention relates to the technical field of a pumped water storage system and a storage battery pack energy storage system, in particular to an output control method and system of an energy storage system. Background technique [0002] With the continuous improvement of the penetration rate of new energy sources, the safe and reliable operation of the power grid is facing more and more challenges. Large-scale wind power grid integration will have a major impact on peak-shaving and frequency modulation, security and stability, and power quality of the grid system. Compared with conventional power sources, wind energy is a typical random and intermittent energy source because it is greatly affected by the weather. Moreover, in actual life, there is still the problem of low prediction accuracy of wind power output. These characteristics lead to the failure of wind farms. The output power has great fluctuations, cannot provide continuous and stable co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/32H02J3/38
CPCH02J3/386H02J3/32H02J3/46Y02E70/30Y02E10/76
Inventor 李永刚刘玉芹
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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