Fault analysis of unbalanced radial and meshed distribution system with inverter based distributed generation (IBDG)

Mathur, Abhishek; Das, Biswarup; Pant, Vinay

doi:10.1016/j.ijepes.2016.09.003

Cited by 38 publications

(39 citation statements)

References 18 publications

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“…The ESS in each MG is considered to supply their own critical loads alone for 4-hours and with DEG for 24-hours. For performing short-circuit analysis, all the inverter-based devices need to modelled as discussed in [36].…”

Section: Test System and Simulation Setupmentioning

confidence: 99%

Protection coordination for networked microgrids using single and dual setting overcurrent relays

Alam

Gokaraju²,

Chakrabarti

2020

IET Generation, Transmission & Distribution

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Section: Test System and Simulation Setupmentioning

confidence: 99%

Protection coordination for networked microgrids using single and dual setting overcurrent relays

Alam

Gokaraju²,

Chakrabarti

2020

IET Generation, Transmission & Distribution

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“…These previous studies have presented only a method for calculating the short‐circuit current without taking distributed renewable energy resources into account. Thus, nonlinear short‐circuit equations were solved by the Newton‐Raphson 7 and BFS methods 8 . Then, the short‐circuit current of inverter‐based distributed generation (IBDG) was calculated in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…Then, the short‐circuit current of inverter‐based distributed generation (IBDG) was calculated in Refs. 7,8. An impedance matrix method of calculating the short‐circuit current of IBDG has been also modified in Ref.…”

Section: Introductionmentioning

confidence: 99%

A short‐circuit analysis algorithm capable of analyzing unbalanced loads and phase shifts through transformers using the Newton‐Raphson power‐flow calculation, sequence, and superposition methods

Kim

2020

Int Trans Electr Energ Syst

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Summary Load in short‐circuit analyses is usually neglected because the short‐circuit current magnitude that flows from conventional rotating machines is significantly greater than the short‐circuit current magnitude changed by the loads. However, as distributed loads unbalanced in phases have been connected to a grid, the current that flows from them affects the magnitude and angle of the short‐circuit current. Thus, the objective of this study is to develop a short‐circuit algorithm able to analyze the effect of unbalanced loads and phase shifts through transformers on the short‐circuit current. For this purpose, this study adds the steady‐state short‐circuit models of loads unbalanced in phases to the sequence network. To determine the accurate short‐circuit current, this study proposes the superposition principle that superimposes the contribution of pre‐ and post‐fault conditions. To calculate the pre‐ and post‐fault voltages, this study also combines the three‐phase Newton‐Raphson and sequence methods. In addition to the superposition principle, this study takes phase shifts through three‐phase transformers in the sequence network into account. The case studies indicate that the proposed method could be more accurate because of not ignoring loads unbalanced in phases and the phase shift through transformers.

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“…BIBC and BCBV matrices for IBDG sources in grid connected or islanded battery energy storage systems have also been proposed . Loads were converted into impedance and the postfault voltage and SCCs of IBDG sources were calculated …”

Section: Introductionmentioning

confidence: 99%

“…12 Loads were converted into impedance and the postfault voltage and SCCs of IBDG sources were calculated. 13 Maximum SCC magnitude has been estimated in previous general transient and steady-state SCC studies. For example, IBDG source should not exceed approximately 1.1 pu, 14 so it could be considered negligible compared with SGs.…”

Section: Introductionmentioning

confidence: 99%

Steady‐state short‐circuit current calculation for internally limited inverter‐based distributed generation sources connected as current sources using the sequence method

Kim

2019

Int Trans Electr Energ Syst

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Summary When inverter‐based distributed generation (IBDG) sources with output current limited by an internal current loop control or other control logic are connected to power system networks, they can affect the short‐circuit current (SCC) despite their small capacities. Therefore, we derive a method to calculate steady‐state SCC from IBDG sources connected to a grid as a current source. To achieve this purpose, this study proposes a method that refers zero‐ and negative‐sequence networks to a positive‐sequence network that includes IBDG sources modeled as a current source. This study also defines positive‐sequence bus impedance and current injection matrices of the network. Subsequently, this study derives new equations that find the positive‐sequence SCC and induced voltages of the network. The proposed method can more accurately calculate SCC that flows from IBDG sources. Thus, accurate SCCs can be used for designing, planning, or maintaining power systems.

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Fault analysis of unbalanced radial and meshed distribution system with inverter based distributed generation (IBDG)

Cited by 38 publications

References 18 publications

Protection coordination for networked microgrids using single and dual setting overcurrent relays

Protection coordination for networked microgrids using single and dual setting overcurrent relays

A short‐circuit analysis algorithm capable of analyzing unbalanced loads and phase shifts through transformers using the Newton‐Raphson power‐flow calculation, sequence, and superposition methods

Steady‐state short‐circuit current calculation for internally limited inverter‐based distributed generation sources connected as current sources using the sequence method

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