Load sharing control of parallel operated single phase inverters

Monica, P. Reena; Kowsalya, M.; Tejaswi, P.

doi:10.1016/j.egypro.2017.05.156

Cited by 13 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The similar constraints on the operation of phase b of the inverter are presented. These constraints are given through (9) to (15). The operation constraints in (9) to (11) verify that the inverter can only charge energy or discharge energy in each time interval.…”

Section: Operation Of Phase Bmentioning

confidence: 99%

“…The battery energy storage systems (BESSs) can also be considered as similar technologies. The BESSs are charged during off-peak time periods and discharged during on-peak time periods [9], [10]. The batteries produce DC voltage and they are connected to the AC grid by an interfacing inverter, which can be properly controlled to regulate active/reactive power, voltage, and frequency of power grid.…”

Section: Introductionmentioning

confidence: 99%

“…The three-phase inverter between the battery and power grid can operate under unbalanced conditions and correct the unbalanced voltages/currents by injecting proper voltages on the three phases. It is also possible to apply three parallel single-phase inverters under the unbalanced condition [9]. These energy storage systems can deal with fluctuations of solar [10] and wind energies, and play a vital role in energy management [11], load leveling [12], peak cutting [13] and reliability improvement [14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stochastic Linear Programming for Optimal Planning of Battery Storage Systems Under Unbalanced-uncertain Conditions

Hemmati

Mehrjerdi

2020

Journal of Modern Power Systems and Clean Energy

View full text Add to dashboard Cite

Battery energy storage system (BESS) has already been studied to deal with uncertain parameters of the electrical systems such as loads and renewable energies. However, the BESS have not been properly studied under unbalanced operation of power grids. This paper aims to study the modelling and operation of BESS under unbalanced-uncertain conditions in the power grids. The proposed model manages the BESS to optimize energy cost, deal with load uncertainties, and settle the unbalanced loading at the same time. The three-phase unbalanced-uncertain loads are modelled and the BESSs are utilized to produce separate charging/discharging pattern on each phase to remove the unbalanced condition. The IEEE 69-bus grid is considered as case study. The load uncertainty is developed by Gaussian probability function and the stochastic programming is adopted to tackle the uncertainties. The model is formulated as mixed-integer linear programming and solved by GAMS/ CPLEX. The results demonstrate that the model is able to deal with the unbalanced-uncertain conditions at the same time. The model also minimizes the operation cost and satisfies all security constraints of power grid.

show abstract

Section: Operation Of Phase Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stochastic Linear Programming for Optimal Planning of Battery Storage Systems Under Unbalanced-uncertain Conditions

Hemmati

Mehrjerdi

2020

Journal of Modern Power Systems and Clean Energy

View full text Add to dashboard Cite

show abstract

“…Numerous droop control techniques have been employed in microgrid applications. For example, droop control methods providing the share of harmonic current [62], droop control methods sharing the power based on the power angle [59], adaptive droop control methods that can adapt to variables [63], droop control methods that can share power by use of virtual impedance [64] and so on have been used in microgrid applications. However, the important disadvantage of these systems is that the voltage and frequency values of microgrids in slanded mode vary by load variation [65].…”

Section: Transient Stability In Grid-connected Microgridsmentioning

confidence: 99%

A Review on Optimization and Control Methods Used to Provide Transient Stability in Microgrids

et al. 2019

View full text Add to dashboard Cite

Microgrids are distribution networks consisting of distributed energy sources such as photovoltaic and wind turbines, that have traditionally been one of the most popular sources of energy. Furthermore, microgrids consist of energy storage systems and loads (e.g., industrial and residential) that may operate in grid-connected mode or islanded mode. While microgrids are an efficient source in terms of inexpensive, clean and renewable energy for distributed renewable energy sources that are connected to the existing grid, these renewable energy sources also cause many difficulties to the microgrid due to their characteristics. These difficulties mainly include voltage collapses, voltage and frequency fluctuations and phase difference faults in both islanded mode and in the grid-connected mode operations. Stability of the microgrid structure is necessary for providing transient stability using intelligent optimization methods to eliminate the abovementioned difficulties that affect power quality. This paper presents optimization and control techniques that can be used to provide transient stability in the islanded or grid-connected mode operations of a microgrid comprising renewable energy sources. The results obtained from these techniques were compared, analyzing studies in the literature and finding the advantages and disadvantages of the various methods presented. Thus, a comprehensive review of research on microgrid stability is presented to identify and guide future studies.

show abstract

“…To control the circulating currents in parallel interleaved connected power inverters a new dead-time compensation method using carrier based sinusoidal pulse width modulation and modified discontinuous PWM techniques are given in [19,20]. The inverters are connected in parallel for distributed generation application that operates under different load conditions was investigated in [21] and improved droop control strategy for these converters are developed in [22]. Parallel operation of inverters with active power filters and their control techniques are discussed in detail [23,24].…”

Section: Introductionmentioning

confidence: 99%

A novel fuzzy based controller to reduce circulating currents in parallel interleaved converter connected to the grid

Gaddameedhi¹,

Srinivas

2021

IJECE

View full text Add to dashboard Cite

This paper exhibits suppression strategy of low frequency circulating current components for parallel inter-leaved converters. Here inverters are parallelized by magnetically coupled inductors. Traditionally, carrier interleaved technique was used to get lower distorted output voltage, but it gives a higher circulating currents to flow through the Two-VSC‘s. The mutual inductance of the coupled inductors (CI) is utilized for minimizing circulating currents of high frequency components. Nevertheless, CI can‘t have capability to riddle the components generated by low frequency. When these circulating currents extremely increases may leads to CI saturation, elevated switching losses and diminishes the entire performance of system. Here author identified a novel control technique for a grid-connected parallel inter-leaved converter depending on approach of energy shaping control (ECS). This controller diminishes the value of the low frequency components of circulating current (LFCC). The performance of the proposed circuit is evaluated in simulation mode and correlated with the conventional proportional integral control (PIC) and the linear quadratic control (LQC). The Fuzzy controller is also included in this work to enhance the converter performance effectively and to diminish the circulating currents along with the healthy harmonic performance analysis.

show abstract

Load sharing control of parallel operated single phase inverters

Cited by 13 publications

References 16 publications

Stochastic Linear Programming for Optimal Planning of Battery Storage Systems Under Unbalanced-uncertain Conditions

Stochastic Linear Programming for Optimal Planning of Battery Storage Systems Under Unbalanced-uncertain Conditions

A Review on Optimization and Control Methods Used to Provide Transient Stability in Microgrids

A novel fuzzy based controller to reduce circulating currents in parallel interleaved converter connected to the grid

Contact Info

Product

Resources

About