Research on electric springs with switchable smart load

Duan, Yubin; Wei, Yi; Wang, Xiaohu; Chen, Xinyuan; Zhao, Chaohui

doi:10.1016/j.egyr.2022.08.139

Cited by 5 publications

(6 citation statements)

References 10 publications

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“…Under the premise of using one PR controller, a switching strategy is shown in Figure 10 to switch load voltage that requires stability at any time [17].…”

Section: Control Strategy Of Es With Sslmentioning

confidence: 99%

“…The value range of β can be solved by simultaneous Equations (11) and (17). Different β value ranges can be calculated by selecting different voltage ranges of V nc and substituting into system parameters.…”

Section: Influence Of the β On Operating Range Of Esmentioning

confidence: 99%

“…Continuing to increase the V g can increase V s to the set reference voltage value, but it may damage the load Z nc . According to Equation (17), when β = π, the amplitude of V nc will be too large, so β = π is not within the reasonable range of β.…”

Section: Experiments Of Working State Of the Es When Stabilized V Smentioning

confidence: 99%

“…Ref. [17] proposes a control strategy of ES with switchable smart load (SSL), which can stabilize the voltage of load Z s for a period of time and load Z nc for another period of time without changing the traditional ES hardware circuit. That is, the roles of Z s and Z nc as “CL” and “NCL” can be interchanged at different times, so as to achieve the goal of not distinguishing between CL and NCL.…”

Section: Introductionmentioning

confidence: 99%

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Influence analysis of working state control angle on electric spring with switchable smart load

Duan

Wei

Wang

et al. 2023

IET Power Electronics

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Traditional electric springs can only stabilize the voltage of critical loads (CL), while sacrificing the operational stability of non‐critical loads (NCL), the status of these two loads is obviously unequal, exposure to fluctuating voltages for extended periods of time can be hazardous to NCL. To solve this problem, a control method based on electric spring (ES) with switchable smart load (SSL) that does not distinguish between CL and NCL is proposed. This paper briefly introduces first the definition, principle and control strategy of the ES with SSL. Then, the relationship between the working state control angle in this control strategy and the working state of ES is analysed in detail. A method to obtain reasonable value ranges of working state control angle by setting boundary conditions is studied. Finally, an experimental platform is built based on DSP TMS320F28069 for experiments, experimental results show that ES can stabilize the voltage of different loads in different time by adopting this control strategy, the working state of ES can be adjusted and the four‐quadrant operation of electric spring can be realized by changing the working state control angle.

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“…Under the premise of using one PR controller, a switching strategy is shown in Figure 10 to switch load voltage that requires stability at any time [17].…”

Section: Control Strategy Of Es With Sslmentioning

confidence: 99%

Section: Influence Of the β On Operating Range Of Esmentioning

confidence: 99%

Section: Experiments Of Working State Of the Es When Stabilized V Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence analysis of working state control angle on electric spring with switchable smart load

Duan

Wei

Wang

et al. 2023

IET Power Electronics

Self Cite

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“…While doing this non-critical load has to sacrifice power stability. To overcome this the concept of the switchable smart load was introduced [21] using indirect voltage control. The electric spring does not require, a communication network but with use of a communication network with ES can drastically reduce the power instability [22].…”

Section: Proposed Solutionmentioning

confidence: 99%

A brief review on hardware structure of AC electric spring

Rokde¹,

Thosar²

2022

IJAPE

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<span lang="EN-US">Decarbonizing power generation and reducing greenhouse gas emissions require renewable energy sources. Intermittent nature of renewable energy sources can cause blackouts, fluctuation in voltage, grid-connected inverter usage, inability to predict power generation, fluctuations in voltage and frequency. It is possible to balance between the supply and demand of power to overcome these problems by using an electric spring (ES). It is necessary to study its work, types, and controlling actions for realizing the benefits of the electric spring. This paper reviews the hardware structure of an ES based on voltage-source inverter (VSI) and current-source inverter (CSI) topologies, in single-phase and three-phase AC power distribution systems with renewable energy sources. The structure, control strategies, operating modes, advantages and disadvantages of each ES topology are elaborated to make it a suitable alternative for resolving different power quality issues caused due to the high penetration of renewable energy sources.</span>

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