Grace Millirons Assignment #2 Lee Boyd Malvo

A final year project student, Raphael, learns in EEE307 that an oscillator circuit with a differential output can be built using single-ended tuned amplifiers like the one shown below: VDD C₁=R4₁ - Vout VinM₁ Fig. 3.1 Single-ended tuned amplifier schematic (image adapted from B. Razavi ©2012)

the course is power transmission system... Question : Differentiate between capacitance grading and Intersheath grading? dont just copy from google. thanks :)

Voltage sags due to short circuit and earth faults are the cause for the vast majority of equipment problems. Electronics equipment become more susceptible to voltage sag, hence the companies experience production stoppages. Voltage sag analysis is very complex issue. Based on voltage sag randon factors describe on it.

(c) Draw a circuit diagram to represent a TN-C-S earthing system and briefly explain its advantages and disadvantages.   (d) Briefly explain how to estimate the height of air termination of a lightning protection system network using the rolling sphere method and protection angle method. (e) Briefly explain what is meant by Ground Potential Rise (GPR) and explain why an animal like cow would not be adequately protected against GPR.   Note : answer all or else dnt attempt the question

Analyse several voltage and current situations in different loading scenarios in a simplified radial (transformer to consumption) medium-voltage power system example. There are only 2 nodes in the 35 kV line – node 0 from the 110/35 kV and node 1 with one consumer. The physical characteristics of the line and the loading scenarios are individualized for each student – please see the attached file Excel “WM9P3 Task1 data” for your particular data set.  Briefly reflect on the complexity of the calculations for known input or output voltage, as well as for fixed or voltage-dependent consumption in this simple power system model.  Analyse and discuss the sensitivity of the voltage drop [in % of amplitude and the degrees of phase] with respect to the current level [in %] and to the power factor.

How to verify the validity of the nodal analysis technique in solving electrical networks?

With the aim of a schematic, explain the principle of high impedance busbar protection. Answer in handwritten only for like and in short.

A company is producing a certain type of circuit breaker. The fixed cost is (450 000$), and the variable cost is (33$) per unit. The number of units that need to be sold to break even is 37500 units. Find the selling price (b) .per unit

What cases do we use HVDC for testing?

Estimate the length of conduit to perform the next bends. EMT will be bend using a hand bender. Provide your answer in inches (just the number) using up to 2 decimals. The picture shows two panels connected by a back-to-back 23.5" stubs EMT 3/4" 6.25 ft P

Define and draw unit circle. What is the significance of unit circle for system analysis?

The system having ±0.5% of F.S.D if the full scale deflection is 50 units, then accuracy is _____ a. ±0.25 b. ±1 c. ±0 d. ±0.5

7. Describe the direct connection, series and parallel methods of measurements using Q-meters? Why and how do we use these methods, explain in brief.

Voltages are represented by: e, = 20sinwt e2 = 30sin (wt ez = 40cos (wt +") e4 = -15sin wt es = -25cos (wt – ") Find the resultant instantaneous voltage using: (a) (b) (c) trigonometric identities component method complex method

A power generation plant connected to bulk load of high voltage industries shown in Figure Q3 has specifications given in Table Q3. Each equipment reactance is expressed in per unit on a common base of 100 MVA. a) Find the fault level for each bus bar in the generation plant. GI G2 TI Figure Q3: Single line diagram of a power generation plant Table Q3: Specifications of power system components Power System Component Voltage Rating X MVA Rating (kV) (pu) GI 50 33 0.2 G2 40 33 0.18 50 33/11 0.1 T2 40 33/11 0.1

2. What's the primary instrument for locating a break in a cable during emergency maintenance?A. OSAB. OTDRC. MultimeterD. Power meter

The symmetrical short circuit current is ______________________ quantity in nature. a-Exponential b-Ramp c-Alternating  d-Direct

Which of the following cannot be determined with the help of load flow analysis?a) frequency of busbar voltagesb) active and reactive forcesc) phase angle of busbar voltagesd) loss of strengthe) amplitude of busbar voltages

Need help on #2,#3,#4

please give me fast ansswer

The value of symmetrical short circuit current is ___________________ at time t=0. Zero Minimum Unity Maximum

I want a solution in less than 30 minutes Often, the network is referred as an infinite bus when a change in input mechanical power or in field excitation to the unit does not cause an appreciable change in a. system frequency or terminal voltage b. Total production cost c. system frequency and terminal voltage d. system frequency alone

Briefly explain the functions of smart grid.

4. What can installation records be used to determine while servicing equipment?A. Broken connectors in a cable linkB. Problems due to aging during operationC. Broken fiberD. Decreased bending radius during operation

Question 1:a) State why voltage control and cable stranding are necessary in powersystemsb) Briefly explain where and how the following state variables ofa power supply grid are controlled.i) Frequencyii) Active powerili) Reactive poweriv Voltage.

Equal area criteria is a method used to calculate: Select one: O a. None of the answers b. Critical clearing angle and time for transient faults O c. Critical clearing voltage angle for transient faults d. Transient stability current limit O e. Steady state stability power limits

The choice of wiring system design is basically affected by temperature, safety and cost factors, briefly explain these factors.

Transmission and distribution lines are important components of any power system study. Aluminium cable steel reinforced (ACSR) (with steel in the centre – as shown in Figure Q1 is normally chosen instead of copper for transmission Explain: (a)The choice of aluminium instead of copper (b)The need to use and place steel at the core

11 and 12 , i need this answer

EMF in a circuit is ____. a. Cause current to flow b. Maintains potential difference c. Increases the circuit resistance d. Decreases the circuit resistance e. None of the Choices

In standard architectural site plan symbols, a fire hydrant is indicated by a/an _. A. Dark -field circle B. empty unfilled circle C. Unfilled circle and closing the letter"F" D. Unfilled circle with two short diagonal lines extending beneath it.

Write True or False and correct the wrong statement (Ans 7. The unit nearest to the cross-arm in tower has maximum voltage across it and hence it likely to be repaired. 8. Corona losses in DC Transmission supply 10 times more than AC transmission. 9. Irregularity Factor (mv) has value of 0.9 to 0.95 in rough conductor. 10.Power losses in corona dissipated in the form of conductor vibrating. 11. The corona loss on a particular system at 50 Hz is 1 kW/Km per phase but for the same system but 60 Hz will be 1.5 kW/Km per phase. 12.If the number of poles in 3ph 11kV transmission line is 80, then we need 420 discs to suspend the conductor on these poles.

Give example scenarios in 'Power Grid Extension' and explain