Distance Protection in Distribution Systems: How It Assists With Integrating Distributed Resources

Sinclair, Amy; Finney, Dale; Martin, David L.; Sharma, Pankaj

doi:10.1109/tia.2013.2288426

Cited by 104 publications

(45 citation statements)

References 1 publication

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“…Based on the challenges of relay settings and coordination of the over current relays due the large difference in the fault currents in grid connected and islanded mode, research has been diverted towards the application of distance protection to micro grid in which the tripping decision is based on the impedance seen by the relay and not on the current magnitude [21,22]. The DER output may result in under reach and power drawn by the loads may cause over reach of the distance relays.…”

Section: Distance Protectionmentioning

confidence: 99%

Microgrid Protection Systems

Ramamoorty¹,

Lalitha²

2019

Micro-Grids - Applications, Operation, Control and Protection

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Micro grids are miniature version of conventional large power grids functioning either autonomously or with inter connection to the main grid. Primary function of micro grid is to serve power at distribution level. Distributed energy resources (DERs) connected to the micro grid enables reliable and efficient operation of micro grid. Protection of micro grids assumed importance due to increased penetration of distributed energy resources. Most of the distribution systems in earlier days are radial in nature and protection systems are designed for that. These protection systems pose serious challenges when applied to present day distribution systems which are mesh connected and fed by the distributed energy resources. Limitation of the conventional protection scheme demands new insights and methodologies for micro grid protection. Due to intermediate current injection from DERs the conventional coordination of over current (O/C) relays is not possible. Further in meshed systems the fault current flow is bidirectional. Hence the protection of micro grid systems with DERs require different approach to ensure faults are cleared in less time and minimal number of consumers connected to the system are affected. A comprehensive analysis of the suitable techniques applicable for micro grid protection is presented in this chapter.

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Section: Distance Protectionmentioning

confidence: 99%

Microgrid Protection Systems

Ramamoorty¹,

Lalitha²

2019

Micro-Grids - Applications, Operation, Control and Protection

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“…The unknown values of TD and Ipickup for relay/recloser are to be determined by the optimization process based on simulation results of all fault cases in the fault case packages. The pickup current Ipickup_phase for phase relay/recloser is required to be at least 30% larger than the maximum load current ImaxL, while being less than the minimum phase fault current Imin_phase in the system [22]. The pickup current Ipickup_ground for ground relay/recloser should be at least twice the maximum unbalanced current I0maxL while less than the minimum ground faults in the system, as shown in (2-3) (3)…”

Section: Saving Schemementioning

confidence: 99%

Methodology of Automated Protection Analysis for Large Distribution Feeders With High Penetration of Photovoltaic Systems

Tang

2017

IEEE Power Energy Technol. Syst. J.

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This paper presents highly automated methods to study the protective device coordination in large distribution systems with high penetration of distributed photovoltaic (PV) generation. A real distribution feeder with large-scale distributed PV generation has been modeled and verified using the analysis tool OpenDSS and utilizing extensive field measurements. With the accurate and validated feeder model, thorough protection coordination of the system is investigated by applying all the possible phase and ground faults under various scenarios. Under varying PV penetration levels and with different PV interface transformer connections, settings for the phase and ground relay and recloser are verified/defined such that proper coordination is achieved for the entire feeder under all operating conditions, corresponding to both fuse-clearing and fuse-saving schemes. An optimization-based design of protective devices is introduced that ensures proper protection coordination under thousands of possible fault cases. The automated protection analysis has been implemented using OpenDSS with MATLAB COM interface, and this approach and tools can be extended to analyze and design protection coordination of any large distribution feeder, as well as to use as a screening tool while evaluating large scale PV on distribution feeders.

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“…Also, including various types of alternative energy sources with intermittent nature, which led to a significant variation in the level of the short-circuit currents during different islanded and grid-connected modes (Saad et al 2017). The considerable change in the short-circuit level in these different operational conditions burdens the operation and performance of overcurrent protection schemes in detecting various kind of faults in the network and make them even improbable to isolate (Sinclair et al 2014). Utilization of distance Protection schemes could seem to be an appropriate alternative for protecting microgrids instead of conventional overcurrent schemes in cases of the weak faults nature.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of DG infeed on the effective cover of distance protection scheme in mixed-MV distribution network

Saad

Naily

Mohamed

2018

Int. J. Renew. Energy Dev.

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The environmental and economic features of renewable energy sources have made it possible to be integrated as Distributed Generation (DG) units in distribution networks and to be widely utilized in modern distribution systems. The intermittent nature of renewable energy sources, altering operational conditions, and the complex topology of active distribution networks makes the level of fault currents significantly variable. Thus, the use of distance protection scheme instead of conventional overcurrent schemes offers an appropriate alternative for protection of modern distribution networks. In this study, the effect of integrating multiple DG units on the effective cover of distance protection schemes and the coordination between various relays in the network was studied and investigated in radiology and meshed operational topologies. Also, in cases of islanded and grid-connected modes. An adaptive distance scheme has been proposed for adequate planning of protection schemes to protect complex networks with multiple distribution sources. The simplified simulated network implemented in NEPLAN represents a benchmark IEC microgrid. The comprehensive results show an effective protection measure for secured microgrid operation.Article History: Received October 18th 2017; Received in revised form May 17th 2018; Accepted July 8th 2018; Available onlineHow to Cite This Article: Saad, S.M., Naily, N.E. and Mohamed, F.A. (2018). Investigating the Effect of DG Infeed on the Effective Cover of Distance Protection Scheme in Mixed-MV Distribution Network. International Journal of Renewable Energy Development, 7(3), 223-231.https://doi.org/10.14710/ijred.7.3.223-231

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Distance Protection in Distribution Systems: How It Assists With Integrating Distributed Resources

Cited by 104 publications

References 1 publication

Microgrid Protection Systems

Microgrid Protection Systems

Methodology of Automated Protection Analysis for Large Distribution Feeders With High Penetration of Photovoltaic Systems

Investigating the effect of DG infeed on the effective cover of distance protection scheme in mixed-MV distribution network

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