Overview of reactive power compensation technology based on energy storage

doi:10.19799/j.cnki.2095-4239.2021.0197

Abstract

Abstract:

The real-time balance of reactive power based on reactive power compensation is critical to power systems' safe and stable operation. The energy storage converter has a four-quadrant operation function that allows it to output or absorbs reactive and active power simultaneously. It has the function of frequency and voltage regulation. Reactive power compensation technology based on energy storage has the advantages of fast response speed, continuously adjustable, and scale controllable, etc., and is suitable for new power systems with a high proportion of new energy and high electronization. Based on the principle of reactive power compensation for energy storage, this paper introduces reactive power control strategy, serie-parallel modular amplification, and medium, and high voltage cascade technology of energy storage converters of various topology structures. According to the types of energy storage and application scenarios, energy storage reactive power compensation technology and energy storage hybrid reactive power compensation technology is reviewed, and its development process and trend of the research status are mentioned. The early storage reactive compensation mainly adopts short-time scale energy storage technology, such as superconducting energy storage, super-capacitor energy storage, and flywheel energy storage. The advancement of battery energy storage technology can have a positive impact on power grid voltage regulation, black start, and other reactive power compensation fields. Energy storage, static synchronous compensator, and new energy units collaborate based on economic considerations to realize combined voltage regulation of active and reactive power to ensure system voltage level and improve power quality. The new power system based on new energy gives the reactive power compensation technology of energy storage a more crucial role. Transient steady-state cooperative control of energy storage, new energy units, and reactive power compensation devices is the main form of reactive power compensation of new energy stations in the future. The research focuses on energy storage reactive power compensation technology will be the coordinated control strategy between energy storage and other reactive power sources and the solution and optimization of joint programming problems.

Key words: energy storage, reactive power compensation, voltage control, hybrid, converter

CLC Number:

TM 7

Hui YE, Aikui LI, Zhong ZHAGN. Overview of reactive power compensation technology based on energy storage[J]. Energy Storage Science and Technology, 2021, 10(6): 2209-2217.

Figures/Tables 6

References 44

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