found in the literature. These problems have become one of the major concern‚ especially‚ with the use of power electronics devices which are sensitive to the variation of power supply. Among these problems Voltage Sag & Swell are identified as major concern to the electrical consumers. Voltage Sag is one of the most occurring power quality problems that cause severe problems and losses to industry. With the power systems restructuring and shifting trend towards distributed and dispersed generation
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TUTORIAL 1 Fundamentals 1. An inductive load consisting of R and X in series feeding from a 2400-Vrms supply absorbs 288 kW at a lagging power factor of 0.8. Determine R and X. 2. An inductive load consisting of R and X in parallel feeding from a 2400-Vrms supply absorbs 288 kW at a lagging power factor of 0.8. Determine R and X. 3. Two loads connected in parallel are supplied from a single-phase 240-Vrms source. The two loads draw a total real power of 400 kW at a power factor of 0.8 lagging
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Module 4 Single-phase AC Circuits Version 2 EE IIT‚ Kharagpur Lesson 13 Representation of Sinusoidal Signal by a Phasor and Solution of Current in R-L-C Series Circuits Version 2 EE IIT‚ Kharagpur In the last lesson‚ two points were described: 1. How a sinusoidal voltage waveform (ac) is generated? 2. How the average and rms values of the periodic voltage or current waveforms‚ are computed? Some examples are also described there. In this lesson‚ the representation of sinusoidal (ac) voltage/current
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deeply disturbed by what he saw. He believes totalitarianism will be the method that communist party adopts to fight freedom. The book foreshadows many of the events that will happen in a communist society. In many ways‚ the incident of Tiananmen Square in 1989 echoes 1984‚ which is a warning that totalitarian government is a power abuser‚ propaganda manipulator‚ and democracy suppressor. Power Abusiveness"The party seeks power entirely for its own sake. We are not interested inthe good of others;
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The subjugation of the protesters provided an essential meaning to the CCP‚ they persevered. The rebellion was crushed‚ callously‚ despite expectations in the west that the government would collapse and a ‘serious chaotic state’ would appear‚ they remained. The reality that the government remained distinctly indicated an end to calls from pro-democrats to reorganise a rebellion. Gittings argues that ‘fear of national upheaval with historical memory of the rebellion within the past century remained
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IEEE TRANSACTIONS ON POWER ELECTRONICS‚ VOL. 27‚ NO. 3‚ MARCH 2012 1201 A DSTATCOM Topology With Reduced DC-Link Voltage Rating for Load Compensation With Nonstiff Source Srinivas Bhaskar Karanki‚ Nagesh Geddada‚ Student Member‚ IEEE‚ Mahesh K. Mishra‚ Senior Member‚ IEEE‚ and B. Kalyan Kumar‚ Member‚ IEEE Abstract—The distribution static compensator (DSTATCOM) is used for load compensation in power distribution network. In this paper‚ a new topology for DSTATCOM applications with nonstiff
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AUTOMATIC TEMPERATURE CONTROLLED FAN H ere is a circuit through which the speed of a fan can be linearly controlled automatically‚ depending on the room temperature. The circuit is highly efficient as it uses thyristors for power control. Alternatively‚ the same circuit can be used for automatic temperature controlled AC power control. In this circuit‚ the temperature sensor used is an NTC thermistor‚ i.e. one having a negative temperature coefficient. The value of thermistor resistance at
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Case 5: Acceptable Pins A company supplies pins in bulk to a customer. The company uses an automatic lathe to produce the pins. Due to many causes-vibrations‚ temperature‚ wear and tear‚ and the like-the lengths of the pins made by the machine are normally distributed with a mean of 1.012 inches and a standard deviation of 0.018 inch. The customer will buy only those pins with lengths in the interval 1.00 ± 0.02 inch. In other words‚ the customer wants the length to be 1.00 inch but will accept
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ATMN 203 – Mechatronics I Week 1 Introduction • Course Name: ATMN 203 – Mechatronics I • Instructor – Brandeen McDonald. You may call me Brandy or Brandeen or Miss. • I can be reached at brandeen.mcdonald@humber.ca • Phone or Text: 416‐524‐2165 Be considerate here! • Office Hours or By Appointment: Room J230 – Ask Reception to see me. OFFICE HOURS OFFICE HOURS • What Hours Does the Class Have Free? What Hours Does the Class Have Free? • I will poll both sections of this course
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1) TO STUDY THE VARIATION OF RESISTANCE WITH THE NATURE OF MATERIAL For this Nichrome and copper wires of same length (1m) and area of cross section(0.5mm) are taken. One of them (say nichrome) is connected in the circuit and the rheostat is adjusted to get a voltage(V) in the circuit. The corresponding ammeter reading(I) is noted and the ratio V/I=R is calculated. The procedure is repeated for different values of voltage
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