The economic consequences of load shedding in South Africa and the state of the electrical grid 11 Feb 2015 Gavin van der Nest‚ tralac Researcher‚ comments on the current electricity crisis in South Africa Perhaps one of the most pressing challenges facing the South African economy in 2015 is maintaining the structural integrity of its electricity generation network. The power system has come under severe strain due to maintenance backlogs and a failure to bring new generating capacity timeously
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IEEE TRANSACTIONS ON SMART GRID‚ VOL. 2‚ NO. 1‚ MARCH 2011 173 A Control Framework for the Smart Grid for Voltage Support Using Agent-Based Technologies Angel A. Aquino-Lugo‚ Member‚ IEEE‚ Ray Klump‚ Member‚ IEEE‚ and Thomas J. Overbye‚ Fellow‚ IEEE Abstract—The introduction of remotely controlled network devices is transforming the way the power system is operated and studied. The ability to provide real and reactive power support can be achieved at the end-user level. In this paper
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Introduction The main determinant of teenage pregnancy is commonly seen to be poor or lack of sexual education‚ but this essay will outline and explore further options such as social and economic issues including the involvement of education via both schooling and the media on sexual attitudes influencing adolescent sexual behaviour. Pregnancy amongst adolescents is common around the world; however different cultures and different geographical regions have various explanations for teenage pregnancy
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is used for vegetation and ground cover· black and red are used for human featuressuch as roads‚ railways and buildings. CONTOURS LEGENDTopographic maps also use lines to help us locate places on a map. These lines are overprinted to form a grid. These grid lines are given as twodigit numbers that appear on the
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zenith university college | MANAGING ORGANIZATIONAL CHANGE AND DEVELOPMENT | | LEVE 400‚ SEMESTER ONE | 2/23/2013 | Carefully analyze Likert’s Participative Management style and Blake and Mouton’s Grid‚ bringing out why the two were key aspects of the Human Relations approach | LIKERT’S PARTICIPATIVE MANAGEMENT STYLE Likert outlined four systems of management to describe the relationship‚ involvement and roles of managers and subordinates in industrial settings. The management systems
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FISHING 7” LOCK SET PACKER IN DIRECTIONAL WELL HISTORY WELL } Set 7” Lock Set Packer at @4855’. } Dump sand 5 sacks & displace 15 BBLS. } Squeeze off interval & conduct DOC. } RIH 7” CSG Scrapper‚ than fished LSP; un success. } RIH Imp. Block & RIH wash pipe shoe. } Fished LSP; failed‚ than RIH over shot; un success. } RIH wash pipe shoe & RIH Imp. Block. } RIH Releasing tool + lower from 4886’-4899’; fished OK! DIRECTIONAL WELL CAUSE OF CASE } Wrong estimate when displace
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Introduction This is the final report showing all the work put into Mark Smith and Trevor Snaith’s noughts and crosses program‚ for this semesters work. The report includes the aims throughout the project‚ which is to produce a noughts and crosses programme in "C"‚ the problems which we encountered during writing the program and how we solved them. It shows the results of our noughts and crosses program including some printout from the program and an explanation of how the programme works. It also
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and has presided as president of the company since 1982. Mouton was a former student of Robert Blake from the University of Texas. Together they are known for their creation of the aforementioned Managerial Grid which was admittedly composed of Mouton’s creation and Blake’s name. The Grid came into existence when Blake and Mouton were hired as consultants by Exxon. It was during this time that
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converter which is connected to grid side is analyzed. The grid side converter is used to regulate the voltage of the DC link capacitor. Besides it satisfies the unity power factor of grid-side and bi-direction flowing ability of energy. The control model of whole system is built using Matlab/Simulink program. The proposed control structure achieved the fastest and robust dynamic response without stressing the converters or deteriorating the
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An Improved Control Strategy for DFIG System and Dynamic Voltage Restorer under Grid Voltage Dip Peng Cheng‚ Heng Nian‚ Member‚ IEEE College of Electrical Engineering‚ Zhejiang University‚ Hangzhou‚ China cheng_peng@zju.edu.cn Abstract：With the increasing percentage of wind power in the utility grid‚ grid codes require that wind turbines must have low voltage ride through (LVRT) capability. Considering that doubly fed induction generation (DFIG) systems have the tolerance capability ‚ to
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