Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"islanding detection"”.
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Deep learning for islanding detection of grid-connected photovoltaic systems
… protection when considering the unintentional islanding of these resources. Typically, when faults occur, an island or multiple islands may be formed throughout the electrical power distribution system. When the island includes one or more distributed energy resource, there is usually a serious …
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Wide Area System Islanding Detection, Classification, and State Evaluation Algorithm
… of system<br />observability. A power system islanding contingency could be one of the most severe<br />consequences of wide-area system failures. It might result in enormous losses to both the power utilities and the consumers. Even those relatively small and stable islanding events may …
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A Novel Passive Islanding Detection Method Based on Phase-Locked Loop
… systems has led to challenges in the detection of islanding. Among different islanding detection methods (IDMs), passive methods are the least intrusive and typically require the lowest investment cost. However, they generally suffer from larger non-detection zones (NDZs) and higher …
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Islanding detection in distribution system embedded with renewable-based distributed generation
… from the grid, DGs become islanded and early detection is needed to avoid several operational issues. In response to this call, a wavelet-based approach that uses the mean voltage index is proposed in this work to detect islanding operation in distribution systems embedding DGs. The proposed …
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Smart Distributed Generation Systems Using Improved Islanding Detection and Event Classification
… challenges. One such major challenge is islanding detection. Islanding occurs when a DG system is disconnected from the rest of the power grid. Islanding can present serious safety hazards and therefore an accurate and fast islanding detection technique is mandated by DG interconnection …
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Islanding Detection of Grid Connected Distributed Generation Resources Using Symmetrical Components
… challenging problems in distribution network is islanding detection, since it causes serious problems for equipment connected to the network, specially distributed generators (DG). Network fluctuations occurring at different situations impact the accuracy of islanding detection method. The …
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Analysis and Design of Phase Lock Loop Based Islanding Detection Methods
… discusses the grid interface issue of anti-islanding. An electric island occurs when a circuit breaker in the electric power system trips. The distributed resource should disconnect from the electric grid for safety reasons. This thesis will give an overview of the possible methods. Each …
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Islanding Detection and Cybersecurity in Inverter-Based Microgrids Under a High-Noise Environment
Islanding occurs when a connected load to the grid is disconnected from the grid and energized solely by local generators. Islanding can result in frequency and voltage instability, changes in current, and overall poor power quality. Poor power quality can interrupt industrial operations, damage …
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Phase-Locked Loops, Islanding Detection and Microgrid Operation of Single-Phase Converter Systems
… operate in multiple modes of operation, but with islanding detection and resynchronization capabilities for isolation from and reclosure to the grid. The proposed system includes control architecture capable of operating in multiple modes, and with the ability to smoothly transfer between modes. …
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Intelligent Instability Detection for Islanding Prediction
… phasor measurement unit (PMU) based instability detection for islanding prediction procedures using decision tree and neural network modeling. The islanding in the power system define as a separation of the coherent group of generators from the rest of the system due to contingencies, in the case …
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Modern Adaptive Protection and Control Techniques for Enhancing Distribution Grid Resiliency
… protection schemes can be seen in the field of islanding or Loss of Mains(LOM) detection and general fault identification and isolation. Adaptive protection schemes are needed to properly resolve these issues. Although, previous works in this field have dealt with this situation, a more …
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Simulation of microgrid system and low-cost wireless communication network
… or isolated modes of operation. A passive islanding detection method is utilized to switch over from P-Q to V/F control mode, when islanding is detected. The behavior of the microgrid under various faults and other conditions is analyzed. In the second part of the thesis, the need for a …
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Ac-dc Bus-interface Bi-directional Converters in Renewable Energy Systems
… more-distributed-generation power systems. Islanding detection issues in ac-dc bus-interface converters are discussed in detail. More than five frequency-based islanding detection algorithms are proposed. These solutions achieve different performances and are suitable for different …
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Optimal placement of phasor measurement units using the Advanced Matrix Manipulation algorithm
… Real-time Monitoring of the system conditions, Islanding Detection, System Restoration and Bad Data Detection.
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Real-time power system impedance estimation for DG applications: Using PV-inverter based harmonic injection method
… areas such as voltage stability monitoring and islanding detection. In the context of distributed generation (DG), on-line TEI estimation can be easily implemented in existing hardware to add functionality and improve the operation of power converters – the key components of DG systems. Two …
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Modeling and control of an alternating-current photovoltaic module
Energy independence depends greatly on the adoption of renewable energy sources. Yet, electricity, a commodity of everyday life, is currently being generated primarily from fossil fuels in the U.S. Despite the abundance of solar energy, the total electricity from photovoltaic (PV) sources is …
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Control of Power Conversion Systems for the Intentional Islanding of Distributed Generation Units
… system either in the connected or disconnected (islanding) mode to the utility; thus not allowing for both modes to be implemented and transitioned between. Existing detection and re-closure algorithms can also be improved upon. Dependent upon the method implemented, detection algorithms can …