Method and system for controlling virtual inertia of mobile energy storage system

An energy storage system and virtual inertia technology, which is applied in the field of virtual inertia control of mobile energy storage systems, can solve problems such as poor anti-disturbance ability
CN110854887APending Publication Date: 2020-02-28CHINA ELECTRIC POWER RES INST +5
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA ELECTRIC POWER RES INST
Publication Date
2020-02-28

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Abstract

The invention provides a method and a system for controlling virtual inertia of a mobile energy storage system. According to the method and the system, a DC virtual inertia is added in the DC side control of the mobile energy storage system, the control of a virtual synchronous machine is added to the AC control of the mobile energy storage system and inertia and damping are added to the DC side mobile energy storage system so as to better stabilize the DC side fluctuation. The fluctuation includes random fluctuation of the distributed power source and load fluctuation generated by the DC loadand the virtual synchronous machine so that plug-and-play of the DC side load is realized and stable voltage support is provided for the DC side small inertia system. Meanwhile, inertia and damping are provided for the AC side through the virtual synchronous machine control method so that the AC side load fluctuation is stabilized and the power quality of the power supply area of the mobile energy storage system is improved.
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Description

Technical field

[0001] The present invention relates to the field of energy storage technology, and more specifically, to a control method and system for virtual inertia of a mobile energy storage system. Background technique

[0002] Due to the seasonality, suddenness and uncertainty of power demand, the end of the distribution network may have a load demand that is much higher than daily power demand at certain specific times (such as seasonal agricultural loads in remote areas; accidents or faults) Emergency maintenance and rescue load; uncertain load for large-scale outdoor performances and other activities). When it is inconvenient or unnecessary to lay cables, the mobile power supply system can be directly used as the main power supply.

[0003] In recent years, with the continuous development of battery energy storage technology, the cost of battery energy storage has been continuously reduced and its capacity has been continuously increased, making it the most suita...

Claims

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