Wind Turbine and Photovoltaic as Sources of Energy
Recent developments in the renewable energy sector suggest that the wind turbine and photo voltaic as Distributed Generation systems in the distribution network is gaining popularity as a new source of energy. Thus, this interconnected system consistently imposes new challenges in the power system stability. This study investigates the affect of distributed generators on distribution network during fault condition and includes voltage dips, transients and line short circuit fault current. With the increase in power demand, renewable energies such as wind turbines, solar panels and wave power plants have started to play a vital role in the global energy system. The integration of renewable energy into the power system can potentially cause severe challenges for the control and protection of large central generators and the distribution system Despite the capacity of such a complex network, constant disturbances remain in the system which may be dangerous both for the customers and the power electronics equipment in the network.
Advancement in the technology of renewable energy such as wind turbines in the MW range has developed more interest in general and its connection to the distribution network. Today large scale integration of wind turbine is connected to the Grid with high power density and controllability. As the quantity of distribution generation increases, as a result the distribution network becoming more like transmission network and the complexity of the network increases, A fault on such a complex distribution network can have serious consequences on the stability of the power system. A fault in the distribution system creates severe voltage dips and transients which can cause instability. As Distributed resources (DR) or distributed generators (DG)— connected to the distribution systems provides a different type of possibilities for energy conversion and generation compared to large generators connected to the transmission system. For various renewable energy resources like wind turbines, small and micro size wind turbines, conventional diesel generators, internal combustion generators, gas-fired turbines, PV cells and energy storage technologies, converters are required to provide electricity from these resources.
The Power quality is a measure of the voltage, the current and the frequency. Power quality problem may be of different nature which includes interruption, under and over voltages, flickers, harmonics and voltage sags. (The term dip is also used instead of sag).
Distributed generation (DG) is an emerging concept in the electricity sector, which represents good alternatives for electricity supply instead of the traditional centralized power generation concept. The main technical issues for DG connection relate to reliability and quality of supply, protection, metering, and operating protocols for connection and disconnection, islanding and reactive power management. Voltage regulation, voltage flicker, harmonic voltages and DC injection are key quality of supply issues.
Power quality is a measure of how close the voltage at the end user is to being sinusoidal with the rated frequency and the rated voltage magnitude. The cut-in and cut-out of units, especially old wind turbines and large capacitors generate transient voltage variations, also known as switching flicker. Fluctuations in the wind speed cause cyclic voltage fluctuations, also denoted continuous flicker. Frequency converters can generate harmonic currents. The inertia and low negative sequence impedance of induction generators and synchronous generators can, however also contribute to reduction of voltage fluctuations, harmonic currents and imbalance generated by consumers or other generation units.
Coal has been a source of energy for various countries within and around the world for many decades. This rock is formally identified as a dark, hardened sedimentary rock of which is formed by decayed plant substances which are then further burnt and used as a fuel hence providing energy for various tasks. The formation of the rock may take several years as opposed to the transformation of the rock to a fuel however, the process in which the rock...
Siemens Gamesa came into existence through a merger between German multinational Siemens and the Spanish wind energy company Gamesa on the 17th of July, 2016. This Strategic Partnership Agreement that benefitted both companies created a leading wind player. The market strong hold that these two companies possess are geographically diverse hence by merging created a well-balanced footprint around the world. The global presence and network of Siemens makes it essential for a solid business strategy to be in place for...
Solar energy is the energy which comes directly from the sun in the form of light and heat that is converted in the useful form with the help of a variety of technologies, such as solar heating, photovoltaic, molten salt power plants, solar thermal energy, etc. The wind is the form of solar energy. Power generators are used to convert the kinetic energy of the air passing through wind turbine into electric energy (Sumathi, 2015). However, 95% of the world...
Wind energy is the use of wind to make power through wind turbine and forms electricity. Wind energy is renewable and sustainable energy which is good for the environment. It also has the least impact on the environment and the cheapest source compare to other renewable energy. Wind turbine captures wind energy within the area swept by its blade. Then, the spinning blade drive an electric generator that produces the electricity that we need to use daily. Technology is better...
The demand for renewable energy has contributed immensely towards the growth of wind energy industry. Nations such as the United States have shifted away from using fossil fuels. However, the success of wind energy industry depends greatly on wind turbines. A wind turbine is a technological device used in converting energy present in the moving wind into mechanical energy. Occasionally, the mechanical energy that rotates the shaft is converted by a wind turbine generator into electrical energy (Rivkin 2011, p.1)....
Wind has been used as a supply of power for several years. The generation of electricity from wind has experienced a noteworthy pace within the past decade due to depleting typical resources and increasing environmental issues. Wind energy conversion has become a reliable and competitive means for power generation. The life span of contemporary wind turbines is currently 20-25 years, which is comparable to several alternative standard power generation technologies. Introduction:- It is usually accepted proven fact that the Earth’s...
A source of energy can be described as a system from which electricity can be extracted or generated. There are a number of sources of energy, each with its characteristic advantages and disadvantages. Among the many energy sources is power generated from turbines tuned by wind. Wind energy is classified as a renewable source of energy since it can be considered to be unlimited. This paper is an exploration of the advantages and disadvantages of wind energy. Wind power can...
This universe is composed of Matter and Energy. The genius of the last century, rather than the civilization Albert Einstein showed that the two – matter and energy are two faces of the same coin or two manifestations of the same. Also, that the two can be and are keep interchanging into each – other. However, not wandering into the philosophical aspect of the subject, it is better to restrict the subject in the realm of the day to day...
The need for energy from sources with less environmental effect has brought scientist’s attention and greater investment interest in the wind farms sector; which is a solution for the generation of electricity based on the power of the wind but this sector considers to be new and bring occupational risks. This paper will present a brief historical review of the development and growth of the wind farm sector and evaluation of the occupational hazards, risks, and safety that workers in...
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