Power flow analysis in stand-alone 4-wire, 4-leg inverter microgrid with unbalanced loads

Vyawahare, Dhanashree; Chandorkar, Mukul C.

doi:10.1109/epe.2014.6910792

Cited by 8 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…13. In this section, analysis of power flow in interconnecting line is carried out as given in [11]. From the above study it is clear that for unbalanced load on 4-leg inverter side, the negative and zero sequence components in terminal voltages of DG units are within acceptable limits specified by the above mentioned standards.…”

Section: B Case 2: Unbalanced Load On 4-leg Invertermentioning

confidence: 99%

“…The negative sequence component in terminal voltages is not negligible. Hence for calculating instantaneous power, positive and negative sequence components of currents as well as voltages are considered [11]. The 3-phase terminal voltages and interconnecting line currents are represented in the form of phasors as:…”

Section: B Case 2: Unbalanced Load On 4-leg Invertermentioning

confidence: 99%

“…The 4-leg inverters are widely used as active load compensators [9], [10]. The capability of using 4-leg inverter as an interface for stand-alone microgrid with unbalanced load is discussed in [11]. Its application to handle emergency mode for line interactive system is discussed in [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distributed generation system with hybrid inverter interfaces for unbalanced loads

Vyawahare

Chandorkar

2015

2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

Self Cite

View full text Add to dashboard Cite

Applications of 4-leg inverter are found not only in active and unbalanced load compensators but also as an interface for transferring power generated by renewable energy sources in distributed generation system and microgrids. However existing distributed generation systems commonly use 3-leg inverters. In this paper, the possibility of using a 4-leg inverter interface along with the existing units with 3-leg inverter is explored. This forms the distributed generation system with hybrid inverter interfaces and is studied in detail in presence of unbalanced loads. Analysis of a hybrid system is presented in respect of sequence component analysis of terminal voltages. It is shown that if the expected unbalanced loads are fed from the 4-leg inverter side, the performance of the system is improved in respect of negative and zero sequence components in terminal voltages.

show abstract

Section: B Case 2: Unbalanced Load On 4-leg Invertermentioning

confidence: 99%

Section: B Case 2: Unbalanced Load On 4-leg Invertermentioning

confidence: 99%

See 1 more Smart Citation

Distributed generation system with hybrid inverter interfaces for unbalanced loads

Vyawahare

Chandorkar

2015

2015 IEEE 6th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

Self Cite

View full text Add to dashboard Cite

show abstract

“…The 4-leg inverters are widely used as compensators for tackling grid voltage unbalances in grid connected mode [9], [10], [11], [12] and also in distributed systems as an inverter interface [13]. Advantage of using 4-leg inverters is its ability to control zero sequence currents and effective DC link utilization.…”

Section: Introductionmentioning

confidence: 99%

“…Decoupled controller is designed such that it is not affected by small nonlinearity and unbalances in the load. The advantage of using 4-leg inverters is illustrated in [13] by carrying out the simulation exercise as explained below.…”

Section: Introductionmentioning

confidence: 99%

Line interactive distributed 4-leg inverter system with unbalanced and nonlinear loads

Vyawahare

Chandorkar

2014

2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

Self Cite

View full text Add to dashboard Cite

This paper is concerned with the distributed line interactive operation of 4-leg inverters. Generally, a 3-leg inverter is used as an inverter interface in distributed systems or microgrids. However 3-leg inverters are incapable in effectively handling the unbalance and nonlinearity in the loads. The 4-leg inverters, on the other hand, can control zero sequence currents and give effective DC link utilization. This feature is utilized here to improve the emergency operation of line interactive system. In case of failure of main power supply, that is in emergency operation, 4-leg inverters can maintain balanced and sinusoidal voltages even if the load is unbalanced and nonlinear. Instead of a dedicated compensator designed for handling load unbalance or nonlinearity, the system is inherently made capable of handling such loads. For line interactive operation the transitions between normal and emergency mode are taken care of by frequency restoration scheme. This allows seamless transitions without any change in control algorithm.

show abstract

Dynamics of power flow in a stand-alone microgrid using four-leg inverters for nonlinear and unbalanced loads

Vyawahare¹

2019

Distributed Energy Resources in Microgrids

View full text Add to dashboard Cite

Power flow analysis in stand-alone 4-wire, 4-leg inverter microgrid with unbalanced loads

Cited by 8 publications

References 12 publications

Distributed generation system with hybrid inverter interfaces for unbalanced loads

Distributed generation system with hybrid inverter interfaces for unbalanced loads

Line interactive distributed 4-leg inverter system with unbalanced and nonlinear loads

Dynamics of power flow in a stand-alone microgrid using four-leg inverters for nonlinear and unbalanced loads

Contact Info

Product

Resources

About