Extending the Operation Range of Electric Spring with Dual Inverters

As an emerging technology for power demand side management, electric spring (ES) is used to improve power quality of the grid containing a high proportion of renewable energy sources (RES). Most of the existing ESs are connected in series with non-critical loads (NCL) to form smart loads (SL), which...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2024-03, Vol.39 (3), p.1-13
Main Authors: He, Wentao, Qiu, Dongyuan, Zhang, Bo, Chen, Yanfeng, Xie, Fan, Xiao, Wenxun
Format: Article
Language:English
Subjects:
Batteries
Compensation
Control methods
demand side management
Electric spring (ES)
Electrostatic discharges
Fluctuations
Inverters
New technology
Power consumption
Power generation
Reactive power
renewable energy source (RES)
Renewable energy sources
smart loads (SL)
Springs
Topology
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Summary:As an emerging technology for power demand side management, electric spring (ES) is used to improve power quality of the grid containing a high proportion of renewable energy sources (RES). Most of the existing ESs are connected in series with non-critical loads (NCL) to form smart loads (SL), which power consumption can follow the variation of RES power generation automatically. But in fact, the structure of direct series connection between ES and NCL limits the operating range of ES. In order to solve this problem, an improved ES topology based on dual inverters, called DI-ES, is proposed. The structure of the dual inverters allows DI-ES to have two output ports, one of which is connected in series with NCL for reactive power compensation and the other output port is connected in parallel with the NCL for active power compensation. DI-ES changes the traditional structure of ES in series with NCL, and improves the power compensation capability and flexibility of ES. In this work, the topology, operating principle and control method of DI-ES are introduced in detail. The effectiveness of DI-ES has been verified by simulation and experiment results.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2023.3340262