Enhancement of voltage regulation using a 7-Level inverter based electric spring with reduced number of switches

Deepika, K. K.; Kumar, Jay; Rao, G. Kesava

doi:10.11591/ijpeds.v11.i2.pp555-565

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…Increasing levels demands more complex control. Hence the seven level MLI with reduced switch count is proposed in [39] and shown in Figure 6(b) .It reduces THD to 0.44% in main voltage. The packed E cell based SPES-B is shown in Figure 6(c), it uses the artificial neural network (ANN) based controller with features like: reduced number of components, more switching states and spectacular dynamic performance during transients [40].…”

Section: Single Phase Electric Spring With Battery (Spes-b)mentioning

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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Section: Single Phase Electric Spring With Battery (Spes-b)mentioning

confidence: 99%

A brief review on hardware structure of AC electric spring

Rokde¹,

Thosar²

2022

IJAPE

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“…Applying proper pulses to the switches three phase voltage is generated, that is applied to the grid through a filter. To filter out the harmonics in the current, different filters 'L', 'LCL', 'LC' are available in literature [24]. 'L' filter was used to filter the harmonics in the current [25][26].…”

Section: Operation Of 3-phase Invertermentioning

confidence: 99%

Adaptive hysteresis band current control of grid connected PV inverter

Sankar¹,

Venkatesh²,

Deepika³

2021

IJECE

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In this paper, adaptive hysteresis band current controller is implemented to control the current injected into the grid. Initially it was implemented by B.K Bose for control of the machine drive. Now it is implemented for the grid connected PV inverter, to control the current injected into Grid. It is well suitable for the distribution generation. The adaptive hysteresis band controller changes the bandwidth based on the modulating frequency, supply voltage, input DC voltage and slope of the reference current. Consequently, the controller generates pulses to the inverter. It is advantageous over the conventional hysteresis controller, as the switching frequency is maintained almost constant. Thereby quality of grid current is also improved. It is verified in time domain analysis of simulation using MATLAB.

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“…Grid specifications are taken as 400V, 50Hz and impedance = (0.1 + 400) . A PR controller is used to drive the inverter and an LCL filter is used to improve the quality of grid current [25]- [28]. PWM technique is implemented to produce switching pulses to converter.…”

Section: Harmonic Stability Analysis Of Multilevel Inverters Tied To the Gridmentioning

confidence: 99%

Harmonic stability analysis of multi-paralleled 3-phase PV inverters tied to grid

Sankar¹,

Deepika²,

Satyanarayana³

2021

IJPEDS

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In this paper the harmonic stability is investigated for multi paralleled three-phase photovoltaic inverters connected to grid. The causes to harmonically stabilize/destabilize the multi-paralleled PV inverters when tied to the grid isanalysed by the impedance-based stability criterion (IBSC). In this paper stability of the system is investigated by varying the grid inductance with constant grid resistance and also by varying load impedance while maintaining grid inductance constant. Stability of the multiple three phase inverters tied to the grid with different grid impedance, inductance value inparticular are analyzed. Overall system is stable up to grid inductance of5mH even though there is change in load admittance. It is concluded that system stability depends only on grid impedance. It is verified with Matlab Simulations.

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Enhancement of voltage regulation using a 7-Level inverter based electric spring with reduced number of switches

Cited by 5 publications

References 18 publications

A brief review on hardware structure of AC electric spring

A brief review on hardware structure of AC electric spring

Adaptive hysteresis band current control of grid connected PV inverter

Harmonic stability analysis of multi-paralleled 3-phase PV inverters tied to grid

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