Power quality (PQ) is the key to successful delivery of quality product and operation in industry. Both electric utilities and end users of electrical power are becoming increasingly concerned about the quality of electric power. The term power quality has become one of the most prolific buzzword in the power industry since from the late 1980s.power quality may also be defined as the degree to which both the utilization and delivery of electric power effects the performance of the electrical equipment. It is now even more critical to the industry because of increasing application of electronic loads and electronic controllers which are sensitive to the quality of power supplied.
In order to meet PQ standard limits, it may be necessary to include some sort of compensation. Modern solutions can be found in the form of active rectification or active filtering. A shunt active power filter is suitable for the suppression of negative load influence on the supply network, but if there are supply voltage imperfections, a series active power filter may be needed to provide full compensation.
Conventionally, passive LC filters and fixed compensating devices with some degree of variation like Thyristor switched capacitors, Thyristor switched reactors were employed to improve the power factor of A.C. loads. Such devices have the demerits of fixed compensation, large size, ageing and resonance. Nowadays equipments using power semiconductor devices, generally known as active power filters (APF's), Active Power Line Conditioners (APLC's) etc. are used for the power quality issues due to their dynamic and adjustable solutions.
Institute of Electrical and Electronic Engineers (IEEE) Standard IEEE1100 defines power quality...
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...wer distribution system more healthy, the Multi converter unified power quality conditioner(MC-UPQC) is one of the best solutions [11]–[17]
The objective of this project is to understand the modeling and analysis of a shunt active power filter. In doing so, the accuracy of current compensation for current harmonics found at a nonlinear load, for the PQ theory control technique is supported and also substantiates the reliability and effectiveness of this model for integration into a power system network. The model is implemented across a two bus network including generation to the application of the nonlinear load.
The aim of the system simulation is to verify the active filters effectiveness for a nonlinear load. In simulation, total harmonic distortion measurements are undertaken along with a variety of waveforms and the results are justified accordingly.
Muller, S., Prowse, D. L., & Soper, M. E. (2012, September 25). CompTIA A+ Cert Guide: Power Supplies and System Cooling | Foundation Topics | Pearson IT Certification. Retrieved March 20, 2014, from http://www.pearsonitcertification.com/articles/article.aspx?p=1945640
The second method of measuring three phase power is the useful for both balanced and unbalanced loads. By connecting a wattmeter with its current probes in series with red phase and volt probes between red and yellow phase. The second wattmeter should be connected with its current probes in series with the blue phase and the volt probes between the blue and yellow phases. By adding these two values together there total power for the system can be
It was also possible to simulate ED system after the electric resistances of the equivalent circuit were obtained from the analysis of the time course of PaCl. The simulation results agreed with ED data very well.
My knowledge of engineering is reasonable and includes transformer substations, power plants, power distribution and transmission systems, industrial motor control and PLC programming, protective relay coordination, FACTS devices, grounding systems, Matlab programming and project management. In addition, I possess practical experience performing power flow, short-circuit and relay coordination analyses while using a power system modelling software such as ETAP, EDSA, DigSilent and CYME. Consequently, the aforementioned experience and solid engineering education along with your training will allow me to provide support to operating and new
"It was the summer of 1969: Man took his first walk on the moon. Nearly 450,000 people gathered in upstate New York to witness the historic Woodstock concert. And Doris and Don Fisher opened the first Gap store in San Francisco" (Gapinc.com 2007). Today, Gap Inc. is one of the world's largest specialty retailers, with more than 3,100 stores and fiscal 2006 revenues of $15.9 billion. Gap Inc. operates four of the most recognized apparel brands in the world Gap, Banana Republic, Old Navy and Piperlime. Every day, Gap Inc. looks for new ways to connect with customers around the world, providing value to their shareholders and to make a positive contribution in the communities where Gap Inc. does business. Gap Inc brands have a simple, common purpose: "to make it easy for people to express their personal style" (Gapinc.com 2007). Gap Inc. constantly evolves each brand to better meet their customers' needs through innovative and inspiring design; through convenient and engaging store experiences; and by communicating with people in a way that connects to how consumers live, work and play. Gap Inc. involves total quality management through out policies and procedures. In the following information explains how Gap Inc. uses TQM (total quality management), what made Gap Inc. the way it is today, and implementations on total quality management.
UPS’ core competency is efficient and reliable package delivery. However, over the last two decades, UPS invested heavily in Information Technology to develop its capabilities. With this new technology driven approach UPS managed to integrate UPS and client’s info systems. This business process integration benefitted both by exponentially increasing the business value, also these collaborative Info systems unlocked tremendous potential making UPS the world’s most admired company in the year 2000.
The PSS is an additional control system, which is often applied as a part of an excitation control system. The basic function of the PSS is to apply a signal to the excitation system, producing electrical torques to the rotor in phase with speed differences that damp out power oscillations. They perform within the generator’s excitation system to create a part of electrical torque, called damping torque, proportional to speed change. A CPSS can be modeled by a two stage (identical), lead-lag network which is represented by a gain K and two time constants T1 and T2. This network is connected with a washout circuit of a time constant Tw. The signal washout block acts as a high-pass filter with the time constant Tw that allows the signal associated with the oscillations in rotor speed to pass unchanged. Furthermore, it does not allow the steady state changes to modify the terminal voltages. The phase compensation blocks with time constants T1i – T4i supply the suitable phase-lead characteristics to compensate the phase lag between the input and the output signals. The commonly used structure of the PSS is shown in Fig
· B-phase transformer (EMTU-TT01) · Feedback electronic wattmeter · Multi-range moving-iron ammeter · Instrument voltage transformer THEORY AND INTRODUCTION ----------------------- Transformers are used all over the world to step-up and step-down electricity. The transformer is one of the most commonly used electrical devices. The reason the transformer is so popular is because they range in size from 240V to well over 240kV, stepping -up and stepping-down electricity all over the world.
Organizational culture is imperative to the success of the organization. The strength and core values of the organization is supported by the organizational culture. This allows for organization to operate in a specific manner that is specific to that organization and can pave the path for success. Company founders are passionate about their vision and mission and they elude that passion into their employees. When that passion and mission is successfully implied to the employees the company strives in it 's path to success. Founders of companies are the continuing influence for the company to succeed. They pour the foundation of organizational culture so that the vision of their passion is directed in the right path. Organizational culture
Gome Electrical Appliances: Competing for Channel Leadership tell us a story about the legendary development of Gome Electrical Appliances. Its low price sales strategy and the countermeasures toward the price control of the color television price alliance to maintain channel leadership. This case analysis identified two major problems of market strategies Gome took in the channel leadership battle, provided two recommendations, and then analyzed the feasibility of the recommendations.
For the prevantion of the electricity blackout we need to build smart power grid. A modernized electrical grid that uses analog or digital information and communications technology to gather and act on information, such as information about the behaviours of suppliers and consumers is known as a smart grid. This is used to improve the efficiency, reliability, economics, and sustainability of the production and distribution of electricity in an automated fashion[12]. The important aspects of smart grid is to electronic power conditioning and control of the production and distribution of
In this paper, I will talk about how AC circuits can be described by considering voltage and current using complex numbers. An AC circuit requires two separate numbers to be able to completely describe it. This is because it takes into account the amplitude and the phase of the current. The fact that complex numbers can be easily added, subtracted, multiplied or divided with each other makes them ideal for this operation where both amplitude and phase have to work together.
Samsung is an innovative company that focus highly on quality and specialised products, they became an electronics company in 1969 and they released their very first mobile phone in 1988. In 2006, they became the global leading brand within the television market and in 2011, they became the latest smart phone provider in the world and their successful innovation is furthermore expanding. Today Samsung Electronics has proven to be one of the most successful global brands to follow.
The newly appointed district sales manager, Larry Barr, faces the problem of allocating sales quotas among his various sales representatives. This decision will affect everyone's earnings including his own. This problem is compounded by the fact that different territories have, for a variety of reasons, different potentials. In addition, the territory that is known to be the toughest will soon require a new sales rep.
The quality of the product that is being made is very important to a company whatever they are making. The higher the quality if a product the more the company can charge for that product. If the company makes a low quality product that is not very good people will not buy it, also if people can find a similar product at a lower price and higher quality they will buy that. When a business makes a product they must decide on the following things: · what is the lowest level of quality that is acceptable for the product? · who is responsible for the quality control · a method of quality control that will be used that dose not effect the cost to severally What is the BSI? The BSI (British Standards Insatiate) is responsible for setting standards that products must be made to.