Question

Match List - I with List - II.

List - I	List - II
A. Load Flow Analysis B. Stability Studies C. Economic Load Dispatch D. Synchronous Machine	I. V-curve II. B-coefficient III. Gauss-Seidel Method IV. Equal-Area Criteria

• A. A-III, B-IV, C-I, D-II
• B. A-III, B-IV, C-II, D-I
• C. A-IV, B-III, C-I, D-II
• D. A-III, B-II, C-IV, D-I

Hint:

Important associations: \[ \text{Load Flow} \rightarrow \text{Gauss-Seidel} \] \[ \text{Stability} \rightarrow \text{Equal Area Criterion} \] \[ \text{Economic Dispatch} \rightarrow \text{B-coefficient} \] \[ \text{Synchronous Machine} \rightarrow \text{V-curve} \]

Answer 1

The Correct Option is B

Concept: This question is based on matching important concepts of power systems with their corresponding applications or methods. Each topic has a standard associated method or characteristic:
• Load flow analysis uses numerical iterative methods,
• Stability studies use equal area criterion,
• Economic dispatch uses B-coefficients,
• Synchronous machines exhibit V-curves.

Step 1: Matching Load Flow Analysis. Load flow analysis determines:
• bus voltages,
• power flows,
• line losses,
• reactive power distribution. One commonly used numerical method is: \[ \text{Gauss-Seidel Method} \] Hence: \[ A \rightarrow III \]

Step 2: Matching Stability Studies. Power system stability studies determine whether the system remains synchronized after disturbance. A famous technique used is: \[ \text{Equal Area Criterion} \] It compares:
• accelerating area,
• decelerating area. Therefore: \[ B \rightarrow IV \]

Step 3: Matching Economic Load Dispatch. Economic load dispatch allocates generation economically among generators. Transmission losses are represented using: \[ \text{B-coefficients} \] Hence: \[ C \rightarrow II \]

Step 4: Matching Synchronous Machine. A synchronous machine shows: \[ \text{V-curves} \] These curves represent relation between:
• armature current,
• field current. Thus: \[ D \rightarrow I \]

Step 5: Writing the complete matching. Therefore: \[ A-III,\quad B-IV,\quad C-II,\quad D-I \]

Step 6: Selecting the correct option. Hence correct option is: \[ \boxed{(2)} \]