+61-413 786 465

info@mywordsolution.com

## Engineering

 Civil Engineering Chemical Engineering Electrical & Electronics Mechanical Engineering Computer Engineering Engineering Mathematics MATLAB Other Engineering Digital Electronics Biochemical & Biotechnology

Assignment -

Problem 1 -

a) Consider the simplified dc system shown in Fig. 1. Only one converter is modeled, with the remote end represented by a dc source. The ac system is rated at 345 kV, with the converter transformer secondary voltage nominally set to 215 kV. Each transformer has an MVA rating of 597.77 MVA and has a leakage of 18%. Other system parameter values are indicated in the figure. The rectifier dc voltage is nominally 500 kV, and the nominal power at the rectifier end is 1000 MW. Calculate the required transformer turns ratio and inverter side voltage Vd2 so that rated dc power and voltage are maintained with a firing angle α = 15o. b) Calculate power factor and the ac current (magnitude and phase) for the rectifier operating condition.

c) Simulate the circuit using either Matlab/Simulink or PSCAD/EMTDC software. Adjust the turns ratio, ac and remote end dc voltages to the values that you calculated in (a). Report observed values of Vd1, Id, Iac (in source) and power factor and compare with expected values. Report the waveforms of Vd, Vy, Vd1, Id1, and the ac-side waveforms for only a few cycles.

d) Far various α, measure the real and reactive power of the ac source and comment on them.

Problem 2 -

a) We now carry out a similar calculation for the inverter side, Fig. 2. For each of the inverter transformers, assume the transformer rating of 230 kV / 210 kV, Xc = 18%, MVA = 585.81. Assume that at the rectifier side, Vd2 = Vdr = 500 kV, and Pdc = 1000 MW. (Note, due to losses in the line, the inverter power will be smaller). Calculate the required voltage (l-l, rms) at the inverter end that will result in the rated current assuming an extinction angle γ = 15o. Also calculate μ. b) Confirm by simulation, that if α is selected as above, μ and γ are at the expected values. You are required to show a plot from the simulation to indicate how the overlap and extinction angles were measured.

Electrical & Electronics, Engineering

• Category:- Electrical & Electronics
• Reference No.:- M93124764

Have any Question?

## Related Questions in Electrical & Electronics

### 1 a name the three major groups of contamination and

1. (a) Name the three major groups of contamination and briefly describe their physical characteristics. (b) Where do the above contamination types come from? Give one example of each. 2. Name two processes metrics which ...

### Discuss the role of load factor on the cost of electrical

Discuss the role of load factor on the cost of electrical energy.

### 1 goalin this project you will solve a non-trivial design

1 Goal In this project you will solve a non-trivial design problem explicitly using the divide-and-conquer (D&C) approach. The main reason for using the D&C approach is the ease of the design process and the streamlined ...

Research report 1. Read 3 to 4 journal articles about digital control or industrial control, eg. one particular application, implementation aspect such as selection of sampling time, hardware etc. No text book example is ...

### Question -i a star-connected three-phase synchronous

Question - (i) A star-connected, three-phase synchronous induction motor takes a current of 10 amps from a 415 volt supply at unity power factor when supplying a steady load. If the synchronous reactance is 5 ohms/phase ...

### Questions -problem 1 - solve for i0 in fig using mesh

Questions - Problem 1 - Solve for i 0 in Fig. using mesh analysis. Problem 2 - Use mesh analysis to find current i 0 in the circuit. Problem 3 - Use mesh analysis to find v 0 in the circuit. Let v s1 = 120 cos(100t+ 90 o ...

### Assignment - power distribution system transformerscomplete

Assignment - Power Distribution System Transformers Complete your calculations, drawings, and answers, neatly handwritten on these sheets and hand in at the start of lecture in week 6. Absolutely no late submissions will ...

### Electrical engineering questions -q1 two ideal voltage

Electrical Engineering Questions - Q1. Two ideal voltage sources designated as machines 1 and 2 are connected, as shown in the figure below. Given E 1 = 65∠0 o V, E 2 = 65∠30 o V, Z = 3Ω. Determine if Machine 1 is genera ...

### Problem 1 a two-phase servomotor has rated voltage applied

Problem 1: A two-phase servomotor has rated voltage applied to its excitation winding. The torque speed characteristic of the motor with Vc = 220 V, 60 Hz applied to its control phase winding is shown in Fig.1. The momen ...

### Question 1 a pnp transistor withnbspbeta 60 is connected

Question 1. A pnp transistor with β = 60 is connected in a common-base configuration as shown in figure P5.8 (a) The emitter is driven by a constant-current source with I E = 0.75 mA. Determine I B , I C , α, and V C . ( ...

• 13,132 Experts

## Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

### Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

### Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

### Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of \$ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

### Compute the present value of an 1150 payment made in ten

Compute the present value of an \$1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

### Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of \$ 699 per year for 19 years, given a discount rate of 6 percent per annum. As