A hybrid power plant combining fossil fuel and solar energy is an integrated system that merges traditional fuel-based generation with clean solar power, designed to achieve resource complementarity, enhance grid reliability, and reduce carbon emissions. Below is a breakdown of its system composition, operating principles, key advantages, application scenarios, and technical challenges:

1. System Composition

1. Solar Power Generation Unit
- PV Modules: Convert solar energy into direct current (DC) electricity.
- Inverters: Transform DC into grid-compatible alternating current (AC).
- Energy Storage System (Optional): Batteries (e.g., lithium-ion, lead-acid) store excess power for peak shaving.
2. Fuel-Based Generation Unit
- Fuel Generators (Diesel/Heavy Oil): Serve as backup or primary power sources for continuous supply.
- Control System: Coordinates the operation of solar and fuel units.
3. Intelligent Control System
- Energy Management System (EMS): Dynamically adjusts the power output ratio between solar and fuel units based on sunlight availability and load demand.
- Grid-Connected/Off-Grid Switching Device: Ensures stable system operation.