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 20 of 73 for “"Frequency Control"”.
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Frequency Control of Wind and PV Based Isolated Microgrid
… remote area where the grid is not available. The frequency and voltage fluctuation are major problems in such remote microgrid due to intermittent nature of renewable resources like wind and solar PV. The frequency fluctuation should remain within acceptable limits for stable operation of the …
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Secondary voltage and frequency control for dispatchable virtual oscillator controlled inverters
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Load Frequency Control for Electric Water Heater Using DBSCAN Algorithm in real-time
Electric grid frequency stability requires precise balance between supply and demand, a challenge intensified by increasing renewable energy penetration and fluctuating consumption patterns. This thesis develops and validates a novel control strategy for residential water heaters to provide …
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Power System Frequency Control and Stability Analysis With Increasing Renewable Energy Penetration Level
… the deteriorated performance of power system frequency regulation and potential grid frequency instability become more significant. In this dissertation, the inertial control algorithms are investigated and analyzed for power electronics converter in a renewable energy generation unit. The …
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Decentralized frequency control of power systems with deep penetration of wind-based generation
… into the power grid is calling for more control and regulation of the power system dynamics. In particular, the automatic generation control, which is responsible for maintaining the nominal system frequency and the scheduled real power interchange, needs to be modified to include …
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Real power and frequency control of large electric power systems under open access
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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A hybrid computer parameter optimization study of the two-area load frequency control problem \
This thesis is concerned with finding optimum control system settings for the two-area load frequency control problem. The control system settings are optimized relative to two different cost criteria, both of which penalize the inadvertent interchange of energy between the two areas. The problem …
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Controller design via H[infinity] optimal control, quantitative feedback theory and fuzzy logic control : an application to load frequency control
This thesis describes the application of robust controller design techniques namely H[infinity] optimal control, fuzzy logic control and quantitative feedback theory to the load frequency control problem of power systems. It thus forms a comparative study of these design methods. Load frequency …
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Improvements to a key contributor of frequency control : the co-ordination of guide vane operation in a pumped storage plant
… onto the grid. This is a time where the frequency control performance has become an important indicator to see how the power plants are able to deal with the restoration of frequency specifically during peak times. A study was done to identify the systems/aspects which at the time …
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Analysis and design of a 500 kHz series resonant inverter for induction heating applications
… steady state model and analysis of a phase-shift controlled series resonant inverter (PSC-SRl) is presented. This steady state model includes the evaluation of the zero-voltage switching (ZVS) condition and the determination of the ZVS operating region. Based upon this analysis a frequency control …
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Balance of Power: Designing operational practices for balancing electricity markets with growing penetrations of renewable energy
… Australian National Electricity Market (NEM). Frequency control services are critical to ensuring that imbalances are quickly addressed. In this thesis, I first explore the features needed in arrangements for procuring frequency control services during energy transition. Through a comprehensive …
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Dynamically reconfigurable management of energy, performance, and accuracy applied to digital signal, image, and video Processing Applications
… Partial Reconfiguration (DPR) and dynamic frequency control on FPGAs. The framework is demonstrated on: i) a dynamic pixel processor, ii) a dynamically reconfigurable 1-D digital filtering architecture, and iii) a dynamically reconfigurable 2-D separable digital filtering system. Efficient …
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Advanced Control Schemes for High-Bandwidth Multiphase Voltage Regulators
… as energy-storage devices, increasing the control bandwidth (BW) of the multiphase voltage regulator (VR) is a more cost-effective and space-saving approach. However, it is found that the stability margin of current-mode control in high-BW design is very sensitive to operating conditions …
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Control and operation of MMC-HVDC system for connecting offshore wind farm
… suitable solution than HVAC due to its flexible control and transmission distance not affected by the cable charging current. For HVDC connected wind farms, the offshore wind farm AC networks are established by the offshore MMC stations which exhibit significant difference compared to …
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Analysis and design of a high frequency induction-heating system
… semiconductor technology are making high frequency converters for induction heating more feasible at power levels up to 50kW. This research presents the development and analysis of a solid-state induction-heating system, operating directly off single-phase mains frequency, which enables …
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Improvements in integrated high-quality rectifier-regulators
… the switch at turn-off. In this thesis, variable frequency control, swinging choke, and low loss LC snubber techniques are proposed to alleviate these problems. Finally, several experimental converters with different specifications are evaluated with respect to efficiency and ability to meet the …
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CONTROL METHODS FOR BESS POWER CONVERTERS AND FREQUENCY REGULATION IN A LOW INERTIA GRID
… is very low and they are more vulnerable to frequency instability in the event of a sudden and large power mismatch. To address this issue, a battery energy storage system (BESS) is considered a suitable option due to various factors such as better reliability, fast response, continuous …
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Power System Dynamic Control and Performance Improvement Based on Reinforcement Learning
… (RL) techniques for power system dynamic control, particularly voltage and frequency control. The conventional control strategies used in power systems are complex and time-consuming due to the complicated high-order nonlinearities of the system. RL, which is a type of neural network-based …
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