Homework 4

# Homework 4 - 12 max ? B. Instead of series compensation add...

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ECE 529 Utility Applications of Power Electronics Session 37, Page 1/2 Spring 2009 ECE529 Homework #4 (Updated) Due Session 40 (April 29 on campus, May 13 for Engineering Outreach) Problem 1 : For the system below we want to increase the power transfer from Bus 1 to Bus 2 to 650 MW by adding a STATCOM at the midpoint. The STATCOM is connected through a 18:1 transformer with a leakage reactance of .02 on low voltage side, determine the MVA, voltage, and current supplied by the STATCOM. BUS 1 |V 1 |= 345kV LL at 0 o BUS 2 BUS M j30 ohm j30 ohm |V 2 |= 345kV LL at -17.605 o |V m |= ?? at ( θ 1 - θ 2)/2 STATCOM Problem 2: For the system below we want to increase the power transfer from Bus 1 to Bus 2 through series compenstion or by adding a phase shifting transformer. From homework 2 we saw that the power transfer is 600MW with no compensation. A. Add series capacitance to increase P12 to 800MW . What size capacitor is needed? What is the percent compensation? If the max compensation is 60%, what is the new P

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Unformatted text preview: 12 max ? B. Instead of series compensation add phase angle control, again to increase P12 to 800MW. What phase, does the compensator need to produce (assuming we can create such a precise angle? Lets say that max =30 o , what is P 12max ? BUS 1 |V 1 |= 345kV LL at 0 o BUS 2 j60 ohm |V 2 |= 345kV LL at -17.605 o Compensator ECE 529 Utility Applications of Power Electronics Session 37, Page 2/2 Spring 2009 Problem 3: Given a Delta connected load on a 69kV system with the unbalanced impedances given below. Find currents a STATCOM must provide to make the loads unity power factor (assume balanced voltage) using the instantaneous reactive power method to calculate them. Extra credit: Simulate the compensator using ATPDraw. Zab 5 ohm e j 30 deg := Zbc 10 ohm e j 0 deg := Zca 5.77 ohm e j 30 deg :=...
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## This note was uploaded on 03/19/2010 for the course ECE 529 taught by Professor Johnson,b during the Spring '08 term at Idaho.

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Homework 4 - 12 max ? B. Instead of series compensation add...

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