Improved ROCOF relay for islanding detection of solar distributed generation

Reddy, J. Rajesh; Pandian, A.

doi:10.11591/ijeecs.v14.i3.pp1105-1113

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…Passive method identifies islanding by monitoring the parameters such as frequency, voltage, current, active power, reactive power and harmonic distortion. Many techniques were subsequently introduced with various combination of parameters and settings such as rate of change of positive and negative sequence component [4], rate of change of frequency (ROCOF) [5], rate of change of output power [6], rate of change of voltage and changes in power factors [7], voltage unbalance and total harmonic distortion of current [8] and combinations of four passive parameters [9]. The very recent research considered load angle and mechanical power parameters [10], undervoltage block function [11] and sensitivity of different passive parameters [12].…”

Section: Introductionmentioning

confidence: 99%

Hybrid islanding detection method based on the rate of change of frequency and load impedance

et al. 2021

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Interconnection of distributed generation (DG) in distribution system will result in formation of islands in the event of loss of main supply. This scenario is harmful to the power system, hence quick detection is critical to halt the formation of islands. Among the common passive and active detection methods available, the hybrid detection method is identified as the most reliable method. This paper proposes a new hybrid method using the combination of passive and active technique which is the rate of change of frequency (ROCOF) and load impedance, respectively. The passive method works when the value of ROCOF exceeds the threshold value which is set at 0.3Hz/s. The active method works when it detects low value of ROCOF and immediately inject a pre-specified load into the system to increase the ROCOF value up to its threshold value. Simulation study on different case studies is carried out on distribution test system to evaluate the performance of the proposed method. Results show that this method is effective in detecting any events that could result in islanding.

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Section: Introductionmentioning

confidence: 99%

Hybrid islanding detection method based on the rate of change of frequency and load impedance

et al. 2021

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A Novel Power Management Scheme for Distributed Generators in a DC Microgrid IOP: Conference Series

Kishore

Sekhar²,

Prakash

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The energy management scheme is a desirable solution to integrate multiple renewable energy generators into the network and operate them synchronously. Controlling the energy shared between different distributed generators is an important consideration for the stabilized operation of the electricity grid. In this thesis work, a new method with the concept of fall control technique is used and is designed to control the power of each individual generator in the particular DC network. The proposed energy management scheme can be widely applied to the grid connected to the grid and to the grid isolated from the electricity grid to obtain high energy distribution efficiency and also provide greater stability. An efficient power control method for sharing the power required by the load is designed based on the drop control concept. The proposed controller can be applied to a single distributed generator to adjust its output power quickly and accurately. The power sharing control method was formulated, modeled and verified by simulating transient stability and steady state test studies. The optimal coupling resistance for power sharing was also identified. Controller interaction and communication delay were also investigated. Communication delay interference is negligible for the shared power controller. The system is simulated in the MATLAB / SIMULINK environment.

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An Integration of dual UPQC controller for power quality compensation by extending its voltage regulation at grid side as a STATCOM IOP: Conference Series

Sreenivasulu

Rajasekhar

Pandian

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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This paper presents a modified controller by integrating dual unified power quality conditioners: iUPQC controller with its utilization in microgrid and power-quality applications. By utilizing this controller it extends the power quality characteristics just like the UPQC controller it offers reactive power regulation both at load-side bus voltage and at grid-side bus voltage, which also compensates voltage swell & sag. At grid-side iUPQC controller will work as a STATCOM, by providing all the conventional UPQC applications both at the grid-side and load-side. Simulink results are providing to validate the latest functionality of the apparatus.

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Improved ROCOF relay for islanding detection of solar distributed generation

Cited by 3 publications

References 24 publications

Hybrid islanding detection method based on the rate of change of frequency and load impedance

Hybrid islanding detection method based on the rate of change of frequency and load impedance

A Novel Power Management Scheme for Distributed Generators in a DC Microgrid IOP: Conference Series

An Integration of dual UPQC controller for power quality compensation by extending its voltage regulation at grid side as a STATCOM IOP: Conference Series

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