Potential economic impact of fault currents contributed by distributed generation

Nimpitiwan, N.; Heydt, G.T.; Blevins, J. D.; Cummings, A.B.

doi:10.1109/pes.2005.1489674

Cited by 17 publications

(12 citation statements)

References 4 publications

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“…Figure 1 shows a partial network with a newly added solar PV at bus k. The impedance matrix of the system changes and the bus voltage and injected current relationship can be written as Eq. 1 [16].…”

Section: Algorithm For Short Circuit Current Calculationmentioning

confidence: 99%

“…Such situation may cause the undesirable islanding, problem of protection coordination, threat to the reliability of system and impedes the process of integration [11][12][13][14]. There are various recognized standards for conventional SC studies such as IEC and ANSI/IEEE standards [12,15,16]. The limitation of established standards is that they emphasizes mainly on the fault contribution by conventional power system and provides no guidelines for interfacing inverters.…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Assessment of Fault Current Contribution in Smart Distribution Grid with Solar Photovoltaic

Bhatt

Kumar

2017

Technol Econ Smart Grids Sustain Energy

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The aim of this paper is to analyze the short circuit (SC) behavior and variation in fault level due to solar PV inverters in a smart distribution network. In order to investigate the issue, a generic urban distribution feeder is modeled, which supplies power to the loads of varying nature. The network is analyzed according to IEC 60909 standard and the alteration in SC current and fault level by the inverters is reported. Paper also reports that the grid strength and neutral grounding techniques significantly affect the inverter SC current. It is found that, with solar PV integration, the major change in fault level occurs due to the three phase fault then followed by double line to ground and other faults. Moreover, the varying network conditions also alter the SC current and fault level of the system. Such situation has to be managed to ensure the protection coordination and reliability of the system. The integration of more and more renewable energy sources like solar PV is expected in future power grid, therefore a proper planning study is required at the time of integration to ensure the reliable operation of the system. Keywords Single line to ground (SLG) · Double line to ground (DLG) · Line to line (LL) · 3 phase fault · Multiple faults · Solar PV · Distribution network · Weak grid · Fault MVA

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Section: Algorithm For Short Circuit Current Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comprehensive Assessment of Fault Current Contribution in Smart Distribution Grid with Solar Photovoltaic

Bhatt

Kumar

2017

Technol Econ Smart Grids Sustain Energy

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“…In the following cases, we show the failure probability densities assuming that the breaker will operate during the year (see (2) and Fig. 6).…”

Section: Numerical Examplementioning

confidence: 99%

“…As the power grid grows with additional generation and transmission circuits, fault currents also increase, and at some point existing circuit breakers become overdutied [1], [2]. If the fault current through the breaker at the time of breaker operation exceeds the rating of the circuit breaker, the probability of circuit breaker failure increases drastically.…”

Section: Introductionmentioning

confidence: 99%

Reliability implications of increased fault currents and breaker failures

Dam

Meliopoulos

2007

2007 iREP Symposium - Bulk Power System Dynamics and Control - VII. Revitalizing Operational Reliability

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Increased power system fault currents impose stresses that may exceed the design rating of circuit breakers installed decades ago. Excessive stresses on the breakers increase their probability of failure. Breaker failures result in multiple simultaneous outages and are major contributors to system unreliability. As a result, it is desirable to quantify the contribution of increased fault currents to breaker failure. We propose a methodology that quantifies the effect of the relative statistical frequency of the different types of faults in the power system (from single-phase to three-phase faults) on the distribution of fault currents for a given circuit breaker and the implications on system reliability. The proposed work is illustrated with the IEEE 24-bus reliability test system where circuit breaker arrangements are explicitly modeled. The proposed methodology provides accurate fault current distributions through breakers (to closely reflect the expected fault conditions in the field) that help identifying common mode failures in cases of breaker failure. Applications of the proposed work include (a) identification of probabilistic models of common mode outages in real time and (b) reliability assessment of overdutied circuit breakers.

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“…This system data is similar to the one described in [5], [6]. The generation system in the network is modeled as a large synchronous machine with infinite H value.…”

Section: Description Of the Simulation Modelmentioning

confidence: 99%

A real-time controller concept demonstration for distributed generation interconnection

Suryanarayanan¹,

Ren²,

Steurer³

et al. 2006

2006 IEEE Power Engineering Society General Meeting

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In this paper, the set up and demonstration of a real-time controller based on the IEEE Std. 1547 for interconnection of distributed generation (DG) sources to the electric utility grid is presented. The case studies described are based on the philosophy of real-time (RT) hardware in the loop (HIL) simulation. The RT-HIL technique is capable of providing insight into the performance of both the system with the DG as well as the external hardware controller. The results of a real-time controller concept demonstration may be useful in understanding the recommendations of the IEEE Std. 1547 and analyzing the system impact of the interconnection of DGs.

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Potential economic impact of fault currents contributed by distributed generation

Cited by 17 publications

References 4 publications

Comprehensive Assessment of Fault Current Contribution in Smart Distribution Grid with Solar Photovoltaic

Comprehensive Assessment of Fault Current Contribution in Smart Distribution Grid with Solar Photovoltaic

Reliability implications of increased fault currents and breaker failures

A real-time controller concept demonstration for distributed generation interconnection

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