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Among the renewable resources such as wind, biomass, hydel and solar, hydrokinetics is a largely untapped renewable resource that has good potential for small and medium-scale power generation. This work proposes a novel approach for scalable and modular hydrokinetics power generation from slow moving water bodies such as irrigation canals, by integration of multiple turbines with voltage droop control...
Oscillatory nature of the ocean waves lead to intermittent power generated by the wave energy converters (WECs). As a result, WECs face a major barrier for grid integration. The recently introduced undersea storage system (USS) offers a viable solution to overcome this barrier by smoothing the WEC output power fluctuations. Another, but related, issue is that since the output voltage of WECs are relatively...
This paper presents comparative evaluation and explores the different technologies suitable for the implementation of the Medium Voltage Direct Current (MVDC) electrical supplies for the marine on-board electrical distribution network. To realize the MVDC supply in the range from 5 kV to 25 kV, various technological choices are available during the design process and have a direct influence on the...
This paper deals with a control strategy of a grid-connected marine current energy conversion system driven by a 5-phase permanent magnet synchronous generator. A supercapacitor is used as an energy storage device in order to smooth the output power and improve the low-voltage ride-through capability of the energy conversion system. The proposed approach is based on a model predictive approach with...
Today, electrical innovation is the most needed both for own use and for industry. Therefore, researchers create various innovations to improve efficiency. There are so many innovations being developed that the efficiency of the power plant can be improved. One such innovation is the use of turning gear operations in generation to rejuvenate generator turbines and improve efficiency. The purpose of...
The design and implementation of a prototype hybrid power generation system, consisting of a ram air turbine (RAT) generator and an energy storage unit, is presented. The system is intended as a mechanism to supply additional or emergency power on-board an aircraft. Here we present the design, manufacture and testing of a synchronous rectifier required to interface an asynchronous generator to a dc...
This research is directed at the exploration of the possibility of using the power inherent in water distribution networks as a result of flow gradient to serve as an alternative power supply for Impressed Current Cathodic Protection of pipelines The use of pressure, head and flow that is available in water distribution networks as a result of gravity or pump to drive micro hydroelectric generation...
A liquefied natural gas facility in the United States is being expanded to allow liquefaction of natural gas and export of liquefied natural gas while keeping intact the existing import facilities. This means adding more loads and steam-based generation to the existing gas turbine generator portfolio. The upgraded system will feature six gas turbine generators and two steam turbine generators in an...
Permanent-magnet (PM) direct-drive radial-axial flow turbine generator is widely used in the field of low-grade waste heat (below 200 °) Organic Rankine Cycle (ORC) power generation. However, special mechanical balance devices are needed to suppress the axial force produced by radial-axial turbine under the high-speed operation, resulting in not only the complex structure of the generator, but also...
It is a research hotspot that the evolutionary algorithm is applied to the nonlinear parameters identification of turbo-generator speed governor system, but the single evolutionary algorithms have varying degrees of defects: the premature convergence and slow convergence speed. A hybrid optimization algorithm (DEPSO) is proposed to overcome single evolutionary limitations based on the combination...
This paper presents a study about optimization in microgrid with energy storage. The development of technology makes it possible for energy storage utilization as solution for energy management problem due to renewable integration. The ability of energy storage to store and supply power can be used to solve intermittency problem of renewable energy. Furthermore, the possibility of energy storage integration...
The aim of this article is that of proposing a novel approach for the control of an electric gas-generating unit for large power generation. The main objective of the control of a gas generating unit is that of controlling power production, in order to meet the requirements of grid operator, and keep the temperature of the exhaust gasses at the turbine outlet at a constant value in order to allow...
The distributed control architecture becomes more and more important in future gas turbine engine control systems, in which, the sensors and actuators will be connected to the controllers via a network. Therefore, the control problem of network-enabled high-performance distributed engine control (DEC) has come to play an important role in modern gas turbine control systems. While, due to the properties...
The subject of this paper is to make an analysis of advanced autonomous power systems (EPS, PES). This in particular includes to simulate the operation of a model of the Auxiliary Power Unit (APU) in the field of the power supply system EPS (Electric Power System). It ensures the proper operation of basic equipment and systems powered by electricity on board of a modern aircraft compatible with the...
Polish power system is facing increase in demand for energy relative to stagnation in development of installed power capacity, caused mainly by CO2 emissions reduction policy. Therefore, investments resulting with increase of energy efficiency, hence lower emissions relative to produced power are becoming more important. Recently much greater attention is diverted to cogeneration of heat and electric...
Since shipboard power systems are inherently islanded and consist of energy intensive sources and loads, it is an interesting application for dc microgrids. The object of this paper is to explore the merits of dc based shipboard power distribution as compared to conventional ac solutions. A survey of current initiatives, emerging concepts and design challenges is carried out. Based on the review,...
Most facilities have good procedures for conducting routine switching and maintenance. However, what are the procedures for an unplanned breaker trip or equipment failure? Who do you call? How do you lockout? Where do you ground? How do you assess the damage? How do you restart? These are all items that need to be thought about ahead of time so as not to waste a lot of time and create potential safety...
In this paper, a new tool for teaching purposes is presented. The tool is a low-cost Hardware in the Loop simulation with separated process model and control algorithm on standalone hardware which runs in real-time. In this paper, the simulation is used to control the steam turbine model with shaft and generator, but it can be used on wide range of complex physical models. The used model is evaluated...
With the introduction of more and more renewables into the power system both the inertia and the primary frequency reserves are expected to decrease. It is therefore a growing concern that the frequency quality will deteriorate. One way of mitigating these problems may be a more detailed monitoring of the generators providing the primary reserves. A promising approach for monitoring the generators...
The paper considers a power engineering method that can be used at heat power plants burning organic fuel and equipped with gas turbine-generator sets. It provides a solution improving electric power output by supply of pressurized oxygen flows, fuel and vented exhaust to the oxidizing chamber, production of hot combustion products under pressure and their supply to the turbine working cavity, transfer...
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