NDLI: Islanding detection scheme for distributed generation systems using modified reactive power control strategy

Content Provider	IET Digital Library
Author	Mishra, Prajna Parimita Bhende, Chandrashekhar N.
Abstract	The reactive power control (RPC)-based technique is a promising solution for islanding detection. The existing RPC-based islanding detection techniques have limitations of injecting unwanted reactive power during normal operation, almost same detection time for various percentage of unbalance in load and false detection of islanding for small disturbances when steady-state frequency is close to its threshold limit. To overcome the first limitation, the phase angle (θ) between the actual and nominal point of common coupling (PCC) voltage is added to the reference reactive power signal of the controller. The angle (θ) has zero value during normal system operation and increases prominently after islanding. To obtain proportionately faster detection for various percentage of unbalanced load conditions, the positive sequence PCC voltage is used in the detection scheme. Owing to major power imbalance between generation and load at steady state, the frequency may come close to its threshold. Under this situation, even a small disturbance will drag the frequency beyond threshold and false islanding detection will occur. To overcome this problem, discrete wavelet transform analysis of θ is considered in the decision-making criteria. The proposed scheme is tested for islanding conditions as well as under various non-islanding events.
Starting Page	814
Ending Page	820
Page Count	7
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.2017.1777
Journal	IET Generation, Transmission & Distribution
Publisher Date	2018-05-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Decision Making Decision-making Criteria Discrete Wavelet Transform Discrete Wavelet Transform Analysis Distributed Generation System Distributed Power Generation IEEE 13-bus Standard Distribution System IEEE 34-bus Standard Distribution System Integral Transforms Islanding Detection Scheme Modified Reactive Power Control Strategy PCC Voltage Phase Angle Point of Common Coupling Positive Sequence PCC Voltage Power And Energy Control Power Generation Control Power System Control Reactive Power Control Reference Reactive Power Signal RPC-based Technique Steady-state Frequency Unwanted Reactive Power Injection
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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