A synchronous generator is a type of electrical machine that converts mechanical energy into electrical energy using electromagnetic induction. It operates at a constant speed, synchronized with the frequency of the electrical grid. This means that the generator's rotor spins at a speed that matches the frequency of the alternating current (AC) it produces, making it efficient for power generation. These generators are commonly used in power plants, where they are driven by turbines powered by steam, water, or gas. The synchronous generator is essential for maintaining the stability and reliability of the electrical supply, as it can provide both active and reactive power to the grid.