Wide area phase angle measurements for islanding detection — An adaptive nonlinear approach

Liu, Xueqin; Kennedy, Jason; Laverty, David; Morrow, D.J.; McLoone, Seán

doi:10.1109/pesgm.2017.8274610

Cited by 9 publications

(15 citation statements)

References 34 publications

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“…In Fig. 9, Z DC/DC is the equivalent impedance of PV system 2 and its boost converter defined by (7). Z load is the local DC load and its buck converter defined by (8).…”

Section: Equivalent Impedance Model Of Pv Grid-connected Power Generamentioning

confidence: 99%

“…Conventionally developed IDMs can be divided into two major categories: communication-based methods and local measurement-based methods. Communication-based IDMs require additional communication equipment [4][5][6][7], so that the application of such methods is limited to situations where fully functioned communications are available. Local measurement-based methods can be further classified as passive methods and active methods.…”

Section: Introductionmentioning

confidence: 99%

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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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“…In Fig. 9, Z DC/DC is the equivalent impedance of PV system 2 and its boost converter defined by (7). Z load is the local DC load and its buck converter defined by (8).…”

Section: Equivalent Impedance Model Of Pv Grid-connected Power Generamentioning

confidence: 99%

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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show abstract

“…A probabilistic principle component analysis-based islanding detection has been developed in [11,12]using phasor and frequency input from PMU and the detection time is faster but when the value of phase angle and frequency are well matched during the islanding event the scheme collapsed. In [13] they have proposed a modified differential evolution algorithm for preventing DG from islanding event and differentiate other events.…”

Section: Introductionmentioning

confidence: 99%

Determining Islanding Operation Using Micro Grid Phasor Measurement Unit Parameters

Arefin¹

2020

IJETER

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For improving the reliability of the micro grid network, a robust islanding detection algorithm is required. For creating a vigorous islanding detection algorithm voltage angle and current angle should be detected appropriately from the grid. The main objective of this research is to determine and compare the voltage angle and current angle with normal operation and islanding operationof the micro grid to develop multilevel islanding detection algorithm to ensure the higher reliability. In this work, IEEE 30 bus network phasor measurement unit parameters have been determined in PowerWorldSimulator. The result shows that the proposed methodology can appropriately determine the islanding event and the comparative study shows an incredible change in phasor measurement unit parameters when grid goes on islanding operation.

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“…Protection systems of small power plants must detect the loss of network and quickly disconnect the generator as the island operation of the small power plant presents a potentially dangerous working condition. It is for this reason that a big number of islanding detection methods have been developed, and some of these techniques are presented in previous works . Since distribution networks are weak and dispersed, there are numerous faults, which lead to everyday outages of small power plants.…”

Section: Introductionmentioning

confidence: 99%

Single‐phase reclosing technique for reducing islanding events of distributed generators during temporary faults

Milošević

Đurišić

2019

Int Trans Electr Energ Syst

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Summary Integration of renewable energy sources into a distribution system requires adjustments and improvement of the existing relay protection systems. Application of the three‐phase reclosing in radial distribution networks often leads to the island operation of the distributed power generation, which causes the generator's disconnection from the network. The application of the upgraded single‐phase reclosing technique, which is proposed in this paper, enables a partial transfer of energy into the electric power system during the temporary fault. Thus, it contributes to the maintenance of the distributed generator transient stability during temporary faults in the distribution network. Improvement of single‐phase reclosing technique is reflected in the adaptation to eliminate various types of faults that may occur. The analyses include different operation conditions and stability requirements of distributed generators. The proposed solution is presented in the paper by example of different types of distributed generation: a small hydropower plant with a synchronous generator that is directly connected to the distribution network, and a wind power plant with double fed induction generator and photovoltaic systems. The results of the analyses are presented in the form of dynamic simulations performed by DIgSILENT PowerFactory software using IEEE 33‐bus model of distribution network.

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Wide area phase angle measurements for islanding detection — An adaptive nonlinear approach

Cited by 9 publications

References 34 publications

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

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

Determining Islanding Operation Using Micro Grid Phasor Measurement Unit Parameters

Single‐phase reclosing technique for reducing islanding events of distributed generators during temporary faults

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