Optimal Active And Reactive Power Control Essay - 1529 Words

Optimal Active and Reactive Power Control of Wind Turbine Driven DFIG using TLBO Algorithm and Artificial Neural Networks Mahmoud M. ElKholy H. M. B. Metwally Garib M. regal M. Ali Sadek Electrical Power and Machines Engineering Department, Faculty of Engineering Zagazig University, Zagazig, EGYPT Email: melkoly71@yahoo.com Email: elemohsadek@yahoo.com Abstract—This paper investigates the optimal active and reactive power control capabilities for typical wind turbine (WT) driven doubly fed induction generator (DFIG). The main objective is to determine the optimal rotor voltage to extract certain active and reactive power from the DFIG over wide ranges of wind speed. Teaching Learning Based Optimization (TLBO) algorithm is a new heuristic optimization technique, used to obtain the optimum rotor voltages to achieve reference active and reactive powers overall operating points. Artificial Neural Network (ANN) controller is used as an adaptive controller to predict the value of rotor voltage for all operating points. The ideal power curve of a 2 MW wind turbine has been estimated to design the active power controller. The stator reactiv e power control capability with the range of  ±1.6 MVAR is developed. With the proposed control strategy, the DFIG-based wind farm provides Maximum Power Point Tracking (MPPT), fully active and reactive powers control. For all operated wind speeds, the adaptive proposed controller develops useful networkShow MoreRelatedAnalysis Of Wind Power1456 Words   |  6 Pages Extending wind power and uncertain nature of loads in power systems causes difficulties in system provision due to the probabilistic trait of them. In order to plan accurately, it is important to evaluate uncertainties in optimization planning of the power system. As regards to this point, this paper presents a probabilistic multi-objective optimal power flow (MO-OPF) considering the uncertainties in wind speed and the load. This paper uses a point estimate method (PEM) which uses points for estimationRead MoreReactive Power Compensation Strategy For1445 Words   |  6 PagesREACTIVE POWER COMPENSATION STRATEGY FO R CASCADED PHOTO VOLTAIC SYSTEM Abstract – Large scale cascaded photovoltaic systems is contributing renewable energy world wide due to its unique features like reliability, power quality ,amount of energy harvested and so on. However cascaded PV system is facing one of the tough challenges like reactive power control due to varied power distribution over different PV modules. This paper addresses the issue of effects due to reactive power on system reliabilityRead MoreHybrid Electric Vehicles ( Phevs )3014 Words   |  13 Pages such as reduction in power quality and efficiency, increase in power losses and voltage variations, as well as an adverse impact on the customers’ energy price. This paper proposed approach evaluates the effect of integrating a large number of PHEV on power system operation as well as appropriate operation of PHEVs can improve the voltage profile in the network by eliminating the voltage drops in highly-loaded buses with discharging reactive power. Furthermore, the optimal placements for char gingRead MorePhotovoltaic Based Stabilising The Load Distribution Feeders Using Lpc1159 Words   |  5 PagesMail.id:nareshsce@gmail.com ABSTRACT: Balancing load of distribution feeders is significant for falling of power loss and mitigating power flow. As the loop power controller is implanting for the active power and reactive power flows by change in voltage ratio and phase shift. So that the balancing of the load distribution feeders can be achieved. However it can include photovoltaic power producing in feeder balancing load, as a Taipower distribution feeder consisting of two feeders with large amountRead MoreSynopsis : Fig 1795 Words   |  8 Pagesstator lead reactive power, increases the real and imaginary part of rotor voltage which supplied by the rotor converter. Increasing DFIG stator lag reactive power, decreases the real part of rotor voltage in all speed range, increases the imaginary part of rotor voltage in sub-sunchronous speed range and decreases the imaginary part of rotor voltage in super-sunchronous speed range. Figs. 8(a-c) show the generated stator, rotor and total active powers respectively. Total active power is identicalRead MoreAn Interconnection Of Distributed Generations ( Dgs )1267 Words   |  6 Pagesproviding both power and heat. To ensure that the microgrid is operated as a single aggregated system and meets power quality, reliability and security standards, power electronic interfaces and controls need to be applied [1-2]. A microgrid should be capable work in two modes, grid-connected or islanded. The DGs are usually power electronics interfaced and in the grid-connected mode of operation, a microgrid is supported by the main grid’s voltage and frequency. In the island mode, the DG control is responsibleRead MoreLocation Of Statcom For Power Flow Control2401 Words   |  10 PagesLocation of STATCOM for Power Flow Control Dr..Neelakantappa, Narasapur, Hyderabad.,India Dr.AmjanShaik Narasapur, Hyderabad.,India ABSTRACT: Power flow control in a long transmission line plays a vital role in electrical power system. This paper uses the shunt connected STATCOM for the control of voltage and power flow. The proposed device is used in different locations such as sending end, middle and receiving end of the transmission line. The PWM control is used to generate the firing pulsesRead MoreLaonaon Modified Spider Monkey Algorithm821 Words   |  4 PagesOptimization Algorithm for Solving Optimal Reactive Power Dispatch Problem† expressed that to reduce the real power loss, modifications were required in local and global leader phase and a Modified Spider Monkey Algorithm (MMO) was introduced. Paper also upheld that MMO is more favorable for dealing with non-linear constraints. The algorithm was examined on the IEEE 30-bus system to minimize the active power loss. H. Sharma, et al. [45] in 2016, discussed in â€Å"Optimal placement and sizing of the capacitorRead MoreOptimal Power Flow Using Differential Evolution Algorithm Essay2776 Words   |  12 PagesOptimal Power Flow Using Differential Evolution Algorithm S.Vidya Sagar Reddy Dr.P.Venkata Prasad, Professor Department of Electrical and Electronics Engineering Department of Electrical and Electronics Engineering Chaitanya Bharathi Institute Of Technology(Autonomous) Chaitanya Bharathi Institute Of Technology(Autonomous) Hyderabad, India Hyderabad, India vidyasagar.sabbella@gmail.com pvp_reddy@yahoo.co.uk Abstract— This paper presents an efficient and reliable evolutionary based approach to solveRead MorePhotovoltaic ( Pv ) Based Distributed Generators Essay2088 Words   |  9 Pagesgenerators (DGs) are generally controlled as current source to deliver only active power generated by PV source to the grid. However, reactive power transfer capability of such DGs must be utilized to satisfy reactive power demand of the load or to provide reactive power support to the grid. Reactive power management for several such PV based DGs operating in parallel is a challenging task as the available reactive power capacity of each depends on the environmental conditions and may vary continuously

A Dolls House As A Tragic Hero Analysis - 967 Words

A tragic hero is defined as a person â€Å"who has achieved, or who has the ability to achieve greatness but who through a weakness, or tragic flaw in his character, falls into the depths of misery and often to his death† (Ingham 1). Within Oedipus Rex, Sophocles laid the foundation for what is now considered the ideal tragic hero. Within A Doll’s House, Ibsen creates a modern hero in Nora Helmer; a woman who was oppressed for going against social rules for saving her husband. Nora follows the Aristotelian journey of a tragic hero, from hamartia through her tragic fall into catharsis. She is considered a modern day heroine, but critics argue that Nora does not represent the classic tragic hero because she does not have a reversal of fortune†¦show more content†¦Killing his real father, King Laius, is a good example of hamartia because he acted impulsively with anger. However, that anger was kindled by the pressures and judgements surrounding him. While Oedipus killing his father is an essential link in his downfall, he is just as innocent as Nora for his undoing. Oedipus, blind to the complexity that makes up the universe, tries preventing the prophecy that he â€Å"must make love with [his own] mother† and â€Å"shed [his] father’s blood with his own hands† (Sophocles 1453). The audience is moved at the end of each play not because Nora and Oedipus are sinful and insecure, but because they tried doing what was right. This irony is what makes these stories so tragic. These heroes desired the right thing, but it ends up leading toward their destruction. Many people have a hard time conceding that A Doll’s House is a tragedy because it has no visible catharsis. Admittingly, it is not a traditional tragedy. It lacks emotional relief for the audience, while Oedipus Rex contains it. A Doll’s House is left wide open at the end and Nora’s character â€Å"experience[s] a painful dying of the old self and an equally painful emergence of a new being† (Durbach 58). Nora’s understanding of the tragic flaw leads her to reach her own personal catharsis, which is self-realization, allowing her to fix her problem and complete her tragic hero story. During Act II, NoraShow MoreRelatedHenrik Ibsen s A Doll s House899 Words   |  4 PagesAcclaimed as one of the principal playwrights that gave birth to modernism in theatre, Norwegian playwright and theatre director Henrik Ibsen pushed boundaries with his plays that analyzed and criticized societal norms and values. A Doll’s House provides one such example, w here the play’s protagonist Nora leaves her husband in the final scene to undertake a spiritual journey of self-discovery. An alternative ending was made for this play posthumously as a result of the controversy it caused at theRead MoreThe Changing Relationship Between Individual and Society in Modern Drama3272 Words   |  14 Pagesthe stage to exert their messages within the culture of Ancient Greece. Their psychological interest in the characters on stage demonstrated to their audiences their connections to both natural law and mortal law in the context of tragedies. These tragic occurrences `must have had their therapeutic effect by raising to conscious awareness the clans capacity for brutal and unredeemed violence so that it could be sublimated and contained by new institutions . In this way, the Greek dramatists taughtRead MoreHenrik Ibsen s Hedda Gabler Essay2029 Words   |  9 Pagessuccessful merchant providing a plentiful life for his family, while his mot her, Marichen, played the piano and loved theater. Ibsen showed little interest in theater as a child until his family went into bankruptcy and eventually into poverty. That tragic event in his life made Ibsen put his time into reading, painting, and performing acts. By the time he reached the age of 21, he wrote this first play called, â€Å"Catilina,† which was inspired by his idol, William Shakespeare. After Ibsen’s play, CatilinaRead MoreCritical Analysis of Zaabalawi by Naguib Mahfouz6285 Words   |  26 Pagesmuch people care to do justice with their entrusted responsibilities. Theoretically speaking, everybody shows his passion for â€Å"responsibility†. However, he/she may never put the principles of â€Å"responsibility† into practice. As a result of that, the tragic stories of corruption, lies, terror and manipulation start. For instance, politicians claim to be the supporters of democracy and freedom of speech; however, when it comes to their own parties they do not even tolerate opposite ideas from their party

Disability and Individual Disabled Person Free Essays

* Explain the potential impact of disability on the outcomes and life chances of children and young people (CYP 3. 7 3. 1) The potential impact of disability on the outcomes and life chances of children and young people are that they get physical impairments and chronic medical conditions may compromise healthy development and disrupt their educational experiences. We will write a custom essay sample on Disability and Individual Disabled Person or any similar topic only for you Order Now Adper children’s all round development, move on further into the future to have financial difficulties and restricted opportunities and career paths. All of these outcomes can destabilize families and relationships causing stress and depression. * The importance of positive attitudes towards disability and specific requirements helps a person with additional needs to feel more valued and equal to every other child or young person, it also prevents isolation of a child. A positive attitude ensures inclusive and tting. It builds positive relationships so that everyone in the setting and in the world feels respected, safe and happy where they live, and spend their time. Explain the social and medical models of disability and the impact of each on practice (CYP3. 7 3. 3) The medical model promotes the view of a disabled person as dependent and needing to be cured or cared for, and it justifies the way in which disabled people have been systematically excluded from society. The disabled person is the problem, not society. Control resides firmly with professionals; choices for the individual are limited to the options provided and appro ved by the ‘helping’ expert. The medical model is sometimes known as the ‘individual model’ because it promotes the notion that it is the individual disabled person who must adapt to the way in which society is constructed and organised. By labelling a child because of their disability can prevent us from seeing the child as a whole person like their gender, culture and social background the medical models is a traditional view of disability and that through medical intervention the person can be cured where in fact in ost cases there is no cure. They expect disabled people to change to fit into society. * Explain the different types of support that are available for disabled children and young people and those with specific requirements (CYP3. 7 3. 4) Specialised services  Ã¢â‚¬â€œ in my setting we have a special educational needs coordinator and we use other services such as physio therapist, speech therapists, school nurse, social services we use these services in order to provide the right car e for the children in need. How to cite Disability and Individual Disabled Person, Essay examples

Environment Analysis

Question: Micro analysis- Please explain company's internal environment with the Valu chain model. Macro analysis- Please use the PESTEL model to analys only furniture industry in context of both the countires India and UAE on Macro level. Meso analysis- Please use Porter's five forces to analys both the countries India and UAE on Meso level. Answer: Macro Environment: PESTEL analysis Political: The political factor is one of the major factors for any external business environment. So, the Sofa and Chair Company should also follow this factor to understand the market segment in both the countries, i.e. in India and UAE (Yksel, 2012). In India, the political environment is very much friendly and democratic. The companies are very much aware of all the political factors and law regarding the business. In the UAE, the law is also very friendly but in order to stabilize in the country, the Sofa and Chair Company will have to put some effort because in UAE, the political laws are different and also very much complicated for any new business (Yksel, 2012). Economical Factors: Globalization is one of the most important factors for any business. In India, the economical environment is not that much high whereas in UAE, the economy is very much stable and it is very much developed according to the globalization. The effect of financial crisis in 2007 had its effect on India but not in UAE (Yksel, 2012). Social factors: The company is providing job opportunities to the people in India. They are making many people self-dependent. Apart from that, they are providing the best and high quality furniture to the people (Thesofaandchair.co.uk, 2016). In UAE, they will also have to support the society by providing the best quality of furniture and career opportunities. Technological: India is technologically developed. In the market of furniture, there are many technologies which are making the business easier. Moreover, the UAE market is also very much developed with technology than India. So, the technologies of both countries are making a big difference in the furniture industry. Environmental: Geographical environment is very much different for each country. India has different season and UAE is basically a warm country. So, the company has to understand the environment of both the countries (Makos, 2014). Legal: Legal factors are very much important. India has their laws for the furniture business and so does the UAE. The Indian laws are very much easy to understand. However, the UAE law is not so easy and at times are a bit complicated for any start-up business. Micro Environment The value of chain The two major activities, such as primary and secondary, are explained by the Value Chain approach. Marketing, logistic, production, after-sales functions are the part of primary activities. The support processes of primary activities are defined as secondary activities (Walters Lancaster, 2000). SWOT Analysis Strength The company has a strong concept as they have a huge range of functional products which are well designed along with the benefit of gradually increasing uses of materials which are renewable. The Sofa and Furniture Company believe in long term relationship with their partners (Xue-qiao, 2010). Besides that, this company has upgraded themselves according to the modern technology and consumers desire. Opportunities The company should work towards expanding itself throughout the world, especially targeting the main cities. They should recruit experienced and smart employees who can work towards the success of the organization (Xue-qiao, 2010). Weakness Sofa and Chair company has not survived among global marketing as they are very much introvert and want to grab the local market. Threats Global experience is very much important to survive in the market. Any global company can defeat The Sofa and Chair Company as they have less experience in the global market (Indianmirror, 2016). MESO Environment Porters five Forces Power of buyers: The furniture company is one of the strength of Indias economy (Roy, 2011). Thus, the industry has a great buyer base in India. The customers are very much reliable on this industry for purchasing their household and office furniture. Similarly, in UAE, the people are dependent on the furniture companies to decorate their houses and offices (Roy, 2011). Power of suppliers: There are many suppliers of the company like Roat-Irons and Woods which are influencing the Indian market along with that of the UAE market. So, the market of furniture business is very much influenced by the suppliers. Rivalry: Indian market is very much rich with great furniture manufacturers as they have natural source like wood. So, there is a less chance of getting fear of rivalry. However, in the UAE, the market is not that much rich and they have a chance to get slotted and taken over by other companies (Emirates 24|7, 2008). Substitute The Sofa and Chair Company have to be up-to-date according to the latest trend to avoid becoming the odd or old styled furniture company (Ismail et. al., 2011). New entrance Many renowned companies are entering in the market with their new designs which is again a threat for the company. Hence, they need to be with the current trend of the market and keep themselves updated with what the customers want, so that they can have a firm base of customers who do not go to any other company (Ismail et. al., 2011). References Emirates 24|7, 2008. Furniture sector in UAE to have 'highest growth rate in world'. [Online] Available at: https://www.emirates247.com/eb247/companies-markets/retail/furniture-sector-in-uae-to-have-highest-growth-rate-in-world-2008-10-02-1.56620 [Accessed 17 Jan. 2016]. Indianmirror.com, 2016. Furniture Industry, Indian Furniture Industry, Furniture Industry in India, Furniture Industry India. [Online] Available at: https://www.indianmirror.com/indian-industries/furniture.html [Accessed 17 Jan. 2016]. Ismail, W.K.W., Hussain, G., Rashid, S.Z.A. and Mohamad, N.A., 2011. Followers ability as a substitute for leadership. African Journal of Business Management, 5(19), pp.7939-7944. Makos, J. 2014. PESTLE Analysis of India in five Steps. [Online] PESTLE Analysis. Available at: https://pestleanalysis.com/pestle-analysis-india/ [Accessed 17 Jan. 2016]. Roy, D., 2011. Strategic Foresight and Porters Five Forces. GRIN Verlag. Walters, D. and Lancaster, G., 2000. Implementing value strategy through the value chain. Management Decision, 38(3), pp.160-178. Thesofaandchair.co.uk, 2016. Bespoke and Luxury Sofas Designed and Handmade in London | The Sofa Chair Company. [Online] Available at: https://www.thesofaandchair.co.uk/ [Accessed 17 Jan. 2016]. Xue-qiao, S.H.I., 2010. SWOT analysis of the Shanxi agriculture intellectual property rights. Editorial Board Members, p.59. Yksel, I., 2012. Developing a multi-criteria decision making model for PESTEL analysis. International Journal of Business and Management, 7(24), p.p52.