NDLI: Voltage–current–time inverse-based protection coordination of photovoltaic power systems

Content Provider	IET Digital Library
Author	Singh, Manohar Agrawal, Anubha
Abstract	Increasing share of distributed energy resources (DERs) in power networks results in dynamic network topology and short-circuit fault levels. Low fault infeed in PV connected power network will rarely damage any power components, but detection of faults is of prime importance. The existing over-current, voltage, and impedance-based relays may fail to detect/clear the faults. However, it is observed that PV infeed networks are generally weak and experience a collapse in terminal voltage with increase in current during the system faults. In this article, variation in fault currents and voltages is utilised for formulating a new voltage-current-time inverse (VCTI) mathematical relay model. The proposed relay model enhances the operating time of the relays and maintains the protection coordination for weak power networks, especially powered with high PV generation. Using this relay model, a cluster-based protection coordination scheme for PV-dominant penetrated power network is presented. The performance of the proposed relay model and coordination schemes is compared with inverse definite minimum time (IDMT) relays and other relying models. Based on the proposed relay model, a hardware relay prototype model has been developed and it is found that hardware results are highly stable and are within 3% accuracy of simulated results.
Starting Page	794
Ending Page	804
Page Count	11
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 6, Mar (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.6143
Journal	IET Generation, Transmission & Distribution
Publisher Date	2018-10-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cluster-based Protection Coordination Scheme Distributed Energy Resources Distributed Power Generation Dynamic Network Topology Fault Current Contribution Fault Current Parameter Fault Detection Fault Diagnosis Fault Voltage Parameter Hardware Relay Prototype Model Impedance-based Relay Invertors Limited Short-circuit Inverter Rating Low Fault Infeed Overcurrent Protection Overcurrent Relay Overvoltage Protection Photovoltaic Power System Photovoltaic-based DER Power Generation Fault Power Generation Protection Power Generation Reliability Power System Protection PV-connected Power Network PV-dominant Penetrated Power Network Relay Protection Reliability Short-circuit Fault Levels Solar Power Stations Synchronous Generating Units VCTI Mathematical Relay Model Voltage Relay Voltage-current-time Inverse Mathematical Relay Model Voltage-current-time Inverse-based Protection Coordination Wind-based DER
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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