Projects / Electrical / Electrical project 24

Automatic Synchroniser for Two Single-Phase Sources

Approx. component budget: Rs. 7,000 - 12,000

Objective

Detect when two AC sources are in step and give a safe closing signal, and measure the timing accuracy.

What you will build

Zero-crossing detectors on two sources, a microcontroller comparing voltage, frequency and phase angle, synchronising lamps and a relay that closes only when all conditions are met.

Results you can expect

• Phase difference vs time
• Frequency matching
• Closing instant error
• Effect of closing out of phase (shown at low voltage)
• Lamp bright and dark method comparison

What you will learn

Synchronisation conditions for alternators and grid connection, zero-crossing detection and timing.

Tools and notes

Arduino/ESP32, isolation transformers, relay, oscilloscope. Do not connect sources of different grounding, and use low-voltage isolated transformers only.

Resume points from this project

• Built and tested Automatic Synchroniser for Two Single-Phase Sources; objective: detect when two AC sources are in step and give a safe closing signal, and measure the timing accuracy.
• Measured and analysed phase difference vs time and frequency matching; wrote the report and presented the results in a viva. Add your own numbers: [x].

Replace [x] with your own measured results. Write only what you really did.

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