A short-circuit current suppression method and system for an energy storage power station access system based on multi-dimensional stable constraints

By adjusting the reactive power support coefficient of the energy storage power station through multi-dimensional stability constraints, the problem of increased short-circuit current after the energy storage power station is connected is solved, and the short-circuit current is effectively suppressed and the system stability is improved.

CN122456570APending Publication Date: 2026-07-24CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-14
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

After energy storage power stations are connected to the power system, the level of short-circuit current increases significantly, affecting the safe and stable operation of the system. Existing technologies are unable to effectively suppress short-circuit current while taking into account voltage and power angle stability.

Method used

By establishing data files, calculating the risk scenarios of short-circuit current exceeding the standard, determining the fault duration process, and using multi-dimensional stability constraints to adjust the reactive power support coefficient of the energy storage power station, pre-controlling and dynamically adjusting to suppress short-circuit current while taking into account voltage and power angle stability.

Benefits of technology

It effectively reduces the contribution of short-circuit current, improves the reactive power and voltage support effect of energy storage power stations on the system, takes into account multiple dimensions of stability constraints such as voltage and power angle, and ensures stable system operation.

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Abstract

The application discloses a kind of based on multidimensional stable constraint energy storage power station access system short-circuit current suppression method and system, belong to electric power system technical field.The present application includes: establishing data file, based on the data file, the short-circuit current level calculation of energy storage power station access system is carried out, and short-circuit current overproof risk scene is determined;Based on the short-circuit current overproof risk scene, determine the fault duration process, for the fault duration process, with short-circuit current control as target, voltage stability as constraint, determine the reactive power support coefficient mode precontrol adjustment constant value of energy storage power station access system;Judge whether there is low voltage stability constraint in the fault duration process, based on reactive power support coefficient mode precontrol adjustment constant value, adjust reactive power support coefficient, mode precontrol is carried out to suppress the short-circuit current of energy storage power station access system.The present application can effectively improve the reactive voltage support effect of energy storage power station to system, short-circuit current control and multidimensional stability constraint are considered.
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