# Power System Analysis MCQ Part 1

Electrical Engineering MCQ Questions on Power System Analysis.

## Speed of Fast Decoupled vs Newton-Raphson

The speed of fast decoupled load flow method, when compared to the Newton-Raphson method, is approximate:

1. Five times slower as compared to N-R method speed per iteration
2. Same
3. Two times faster N-R method speed per iteration
4. Five times faster the N-R method speed per iteration

Correct answer: 4. Five times faster the N-R method speed per iteration

## The state variables in load flow studies are

The state variables in load flow studies are:

1. P and Q
2. P and IVI
3. P and δ
4. IVI and δ

Correct answer: 4. IVI and δ

## What is the dimension of bus incidence matrix

The dimension of the bus incidence matrix is:

1. e x (n- I)
2. e x n
3. e x (n-+I)
4. e x e

Correct answer: 1. e x (n- I)

## Base current in amperes is mathematically expressed as

Base current in amperes is mathematically expressed as:

1. Base KVA / Base KV (line to line)
2. Base KVA / 3 Base KV (line to line)
3. Base KVA / 3 Base KV (line to line)
4. 1.5 * Base KVA / Base KV (line to line

Correct answer: 2. Base KVA / √3 Base KV (line to line)

## Mathematical expression for interconnection between the electrical and mechanical side of the synchronous machine

The interconnection between the electrical and mechanical side of the synchronous machine is mathematically expressed by an equation known as:

1. EM Theorem
2. Swing equation
3. Sparsity
4. Superposition principle