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Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
A type of 550kV epoxy resin-impregnated paper oil-SF6 bushing, which used in main transformers equipped in a pumped storage power station, has gone wrong repeatedly and its capacitance and dielectric loss increased significantly. In order to clarify the cause of the batch of oil-SF6 bushing failure, the bushing has been tested to check its insulation characteristics, and has been dissected to study...
We aim to solve the OPF problem by defining contingency scenarios involved in the optimization problem by means of a SDP relaxation. Contingency scenarios are performed for the IEEE 39-bus system. Contingency analyses are performed by generation and line losses. Contingency scenarios are considered to be possible events. These events may be single contingencies, such as a generation unit failures...
Cassava flour (Manihot esculenta Crantz) is produced in different regions of Brazil and is part of Brazilian eating habit. The product is characterized by having energy value, containing fiber and carbohydrates. However, the cassava flour houses have generated negative impacts on the environment by burning firewood. Solar energy can be an alternative free, clean and rewable energy source. This paper...
The main objective of this study was to develop a model for performance analysis of a spark ignition engine fueled with propane and octane. GT-Suite software was used to develop the model for a single cylinder 4-stroke gasoline engine having a bore of 85 mm and a stroke of 85 mm with a capacity of 0.48 litres. A one-dimensional gas dynamics was considered for heat transfer model development for different...
Decentralized and hierarchical microgrid control strategies have lain the groundwork for shaping the future smart grid. Such control approaches require the cooperation between microgrid operators in control centers, intelligent microcontrollers, and remote terminal units via secure and reliable communication networks. In order to enhance the security and complement the work of network intrusion detection...
With increasing flexible AC transmission system (FACTS) devices in operation, like the most versatile unified power flow controller (UPFC), the AC/DC transmission flexibility and power system stability have been suffering unprecedented challenge. This paper introduces the user-defined modeling (UDM) method into the UPFC dynamic modeling process, to deal with the challenging requirements of power system...
The very short-term bus reactive load forecasting allows the electrical system operator to determine the optimal amount of energy to supply the demand with quality, safety and reliability. With this premise, this paper used a knowledge data discovery approach to handle the forecast, from raw data to results analysis, using the neural network for data mining. Two forecasting models were developed:...
Numerical simulation of a complete gas turbine engine working with inlet cooling of water injection has been evaluated using computational fluid dynamic (CFD), the influence of water droplet and injection rate on the compressor operation, engine combustion and the turbine were studied. The results obtained in contrast with dry compression unveil that, with minimum amount of water droplet and high...
The demand for higher output efficiencies, greater specific power output, increased reliability, and ever reduced emissions has been rising. Due to its availability one promising alternative is the use of ethanol in internal combustion engines. In this study, the effects of ethanol addition (5%, 15% and 25% by volume) to diesel fuel on the performance and exhaust emissions of a 6 cylinder four stroke...
Existing control strategies of modular multilevel converter (MMC) have many drawbacks, such as need of several parameter controllers, complex parameter tuning and huge computational burden. This paper proposes a novel control method based on the hybrid architecture of proportional integral (PI) control and model predictive control (MPC). The PI controller is used as external controllers to control...
For the allocation of unbalanced power when the loads change in the Multi-terminal HVDC transmission system, a DC voltage slope control strategy considering the Optimal Unbalanced Power Allocation (OUPA) is proposed. The control strategy using hierarchical control includes processing layer and implementation layer. In the processing layer, a mathematical model of unbalanced power allocation is established,...
In this paper, multi-target adaptive system control strategy of UPFC is proposed based on 500 kV UPFC in Suzhou southern grid. With the proposed strategy, transmission lines will operate at target power under normal condition, while power line overload occurs due to N-1 failure or changes of operating conditions, the strategy gives priority to ensure that the power line does not exceed its power limit...
As the temperature of electronic devices increases, their failure rate increases. That's why electrical devices should be cooled. One of the promising cooling techniques is using Phase Change Materials (PCMs). PCMs are potential temperature regulators that store and release thermal energy during the process of melting and freezing respectively. PCM-based heat sinks can effectively store the heat dissipated...
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