Control method of hybrid energy storage system for stabilizing power fluctuation of intermittent type power source

Abstract

The invention discloses a control method of a hybrid energy storage system for stabilizing the power fluctuation of an intermittent type power source, comprising the following steps of acquiring the real-time power of the intermittent type power source, the synthetic output power of power and stored energy, the SOC (State of Charge) of a battery and the voltage of a supercapacitor by a data acquisition module, and sending data to a stabilizing and control module; processing the data in the stabilizing and control module and judging whether the power output is needed or not according to a fluctuation power; and in the case of needing power output, outputting a control power instruction and a charge / discharge instruction, and carrying out output by the energy storage system according to the control instruction, wherein electric energy output by the energy storage system passes through PCS (Power Converters), is synthesized with the output of the intermittent type power source through a circuit breaker respectively and merges into a power grid through a transformer. By the adoption of the control method of the hybrid energy storage system for stabilizing the power fluctuation of the intermittent type power source, the defects that when the power fluctuation of the intermittent type power source is stabilized by the prior art, as the energy storage system mainly adopts a single energy storage medium, the ability of stabilizing the power fluctuation of the intermittent type power source is weak and the service life of an energy storage element is shorter are overcome; and therefore, the practicability and the economical efficiency are enhanced.

Description

technical field [0001] The invention belongs to the application field of energy storage technology, and in particular relates to a control method for a hybrid energy storage system to stabilize intermittent power fluctuations. Background technique [0002] The inherent intermittent volatility of intermittent power supplies causes its large-scale grid connection to endanger the safety and stability of power grid operation, and poses great challenges to grid frequency regulation and reserve capacity planning, resulting in serious power waste in current intermittent power generation stations, affecting the The Economics of Intermittent Power. According to the current wind power grid-connected standards, the national standard GB / T19963-2011 "Technical Regulations for Connecting Wind Farms to Power Systems" issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China and GB / T19964-2011 "Connection Introduced into the Po...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention proposes a control method for the hybrid energy storage system to stabilize the power fluctuation of the intermittent power supply, which overcomes the fact that most energy storage systems use a single energy storage medium in the prior art to stabilize the power fluctuation of the intermittent power supply. The weak ability to stabilize intermittent power supply power fluctuations and the short service life of energy storage components

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