New active islanding detection scheme for constant power and constant current controlled inverter‐based distributed generation

Samui, A.; Samantaray, Subhransu Ranjan

doi:10.1049/iet-gtd.2012.0607

Cited by 32 publications

(19 citation statements)

References 28 publications

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“…(4) [15], and ROCOP as given in Eq. (6) [15]. In the proposed method, the rate-of-change of voltage with active power known as voltage-active power sensitivity is calculated along with voltage, frequency, and active power variations at each bus for every instant of time.…”

Section: Resultsmentioning

confidence: 99%

“…have been proposed for islanding detection in the presence of DGs in the system. The algorithms of passive scheme include under/over frequency and voltage, rate-of-change of frequency and power, vector surge, and harmonic distortion indices [13][14][15][16][17][18]. The passive methods have small time of detection and do not degrade the system power quality.…”

Section: Introductionmentioning

confidence: 99%

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Detection and Operation of Unintentional Islands in the Presence of Distributed Generation Units

Kumarappan¹,

Siddiqui²,

Fozdar³

2017

Development and Integration of Microgrids

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The complexities and challenges for reliable operation of power system have increased due to various types of Distributed Generators (DG) in the Distribution Network (DN) to supply the increasing load demand. It necessitates a comprehensive approach in planning the system towards effective and reliable operation of the system. During the operation of the system, detection of unintentional islanding is critical as non-detection of islanding event could lead to cascaded failure of the system due to active or reactive power imbalance leading to frequency, angle or voltage instability. If undetected, the instability in the islanded part can cascade into the stable part of the system resulting in complete failure of the system. A robust Modified Islanding Detection Technique (MIDT) has been proposed for identifying the islanding event early and accurately in the distribution networks with DGs installed for multiple objectives and is compared with existing passive Islanding Detection Techniques (IDT). A rank-based load shedding scheme is proposed for stable and reliable operation of the identified island, which sheds only the most vulnerable loads in the island for regaining the frequency and voltage stabilities. The proposed MIDT and rank based load shedding schemes were tested on 11kV IEEE 118 Bus Test system.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detection and Operation of Unintentional Islands in the Presence of Distributed Generation Units

Kumarappan¹,

Siddiqui²,

Fozdar³

2017

Development and Integration of Microgrids

View full text Add to dashboard Cite

show abstract

“…These controllers are considered as the most fundamental controllers in the industry for controlling linear systems and considered as the base of control theory. Lot of work in literature is being done on these controllers [49][50][51][52][72][73][74][75][76][77][78]. The fundamental benefits of implementing these controllers are their ability to tune themselves according to the requirement of the plant and their simple structure.…”

Section: Classical Control Techniquesmentioning

confidence: 99%

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

et al. 2018

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Abstract:In the modern era, distributed generation is considered as an alternative source for power generation. Especially, need of the time is to provide the three-phase loads with smooth sinusoidal voltages having fixed frequency and amplitude. A common solution is the integration of power electronics converters in the systems for connecting distributed generation systems to the stand-alone loads. Thus, the presence of suitable control techniques, in the power electronic converters, for robust stability, abrupt response, optimal tracking ability and error eradication are inevitable. A comprehensive review based on design, analysis, validation of the most suitable digital control techniques and the options available for the researchers for improving the power quality is presented in this paper with their pros and cons. Comparisons based on the cost, schemes, performance, modulation techniques and coordinates system are also presented. Finally, the paper describes the performance evaluation of the control schemes on a voltage source inverter (VSI) and proposes the different aspects to be considered for selecting a power electronics inverter topology, reference frames, filters, as well as control strategy.

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“…Active methods detect islanding by injecting small disturbance signals into the system and measuring the response. Frequency shifting methods [18][19][20][21], active/reactive power disturbance methods [22][23][24][25] and impedance measurement methods [26][27][28] are commonly used active methods in AC systems. Similarly, due to the lack of electrical quantities such as frequency and reactive power, frequency shifting methods and reactive power disturbance methods face challenges when adopted in DC systems.…”

Section: Introductionmentioning

confidence: 99%

Islanding detection method of multi‐port photovoltaic DC micro grid based on harmonic impedance measurement

Jia

Zhu

Zhao

et al. 2019

IET Renewable Power Generation

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DC Grid does not transmit reactive power, nor does it offer frequency and phase issues. This results in malfunction of conventional islanding detection methods (IDMs) that rely on the above quantities. At present, the DC IDMs proposed in literatures are mostly active power injection methods based on DC/DC converters. However, in a multi-photovoltaic (PV) DC system, the synchronization of the injection of converters is difficult to guarantee, which may lead to detection failure. This paper proposes an impedance measurement IDM for multi-PV DC micro grid based on the analysis of high-frequency impedance model of power electronic devices. The impedance of DC converters is constant at high frequency and the harmonic impedance of the system changes significantly after islanding, so that islanding operation can be accurately detected. The harmonic impedance change directly reflects the structural changes of the system, and its calculation requires less disturbance intensity, which avoids the requirement of synchronous injection. Therefore, the method uses a DC/DC converter for injection, without the need for additional injection equipment. The method has little influence on power quality and theoretically has no none detection zone. Simulation results show that the method can perform accurately islanding detection in multi-PV DC micro grid.

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New active islanding detection scheme for constant power and constant current controlled inverter‐based distributed generation

Cited by 32 publications

References 28 publications

Detection and Operation of Unintentional Islands in the Presence of Distributed Generation Units

Detection and Operation of Unintentional Islands in the Presence of Distributed Generation Units

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

Islanding detection method of multi‐port photovoltaic DC micro grid based on harmonic impedance measurement

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