Comprehensive Overview of Grid-Connected Photovoltaic Power Generation
Types of Grid-Connected Photovoltaic Power Generation
Grid-connected photovoltaic power generation encompasses two primary types: centralized large-scale and distributed small-scale photovoltaic power stations.
Centralized Large-Scale Photovoltaic Power Stations
- Scale and Transmission: Typically megawatt-level ground-mounted stations, directly transmitting generated electricity to the grid for uniform allocation to users.
- Investment and Land Requirements: These stations demand substantial investments, occupy extensive land areas, and have specific grid connection prerequisites.
Distributed Small-Scale Photovoltaic Power Stations
- Advantages: Particularly popular among enterprises and households, these systems offer small investment, rapid construction, minimal land occupation, and strong policy support, representing the mainstream of photovoltaic grid connection.
Environmental and Economic Benefits
Environmental Protection and Sustainability
- Clean Energy Generation: Utilizing clean, renewable solar energy, these systems consume no carbon-containing fossil fuels, emit no greenhouse gases or pollutants, aligning with sustainable development strategies.
- Elimination of Battery Storage: By directly inputting electrical energy into the grid, they replace the battery in independent photovoltaic systems, eliminating the need for energy storage devices.
Efficiency and Cost Reduction
- Full Utilization of Generated Electricity: The absence of battery storage and release processes ensures full utilization of electricity generated by the photovoltaic array, reducing energy loss and lowering system costs.
- Maximum Power Point Operation: The photovoltaic array consistently operates at the maximum power point, with the grid absorbing all solar-generated electricity, enhancing solar power generation efficiency.
System Advantages and Applications
Reduced Power Outage Rates
- Parallel Power Sources: Combining municipal power with solar photovoltaic systems as local AC load power sources reduces the overall system power outage rate.
- Peak Shaving Capability: Grid-connected photovoltaic systems can assist in peak shaving for the public power grid, enhancing grid stability.
Local Power Supply and Grid Relief
- Decentralized Power Generation: Decentralized photovoltaic systems supply electricity to local users, alleviating transmission and distribution burdens on the grid.
- Resilience to Disasters: These systems possess war and disaster resistance capabilities, improving power system load balance and reducing line losses.
Strategic Development Opportunities
Desert Area Utilization
- Abundant Light Resources: Leverage the abundant light resources and geographical advantages of desert and coastal areas to construct large-scale centralized photovoltaic grid-connected power stations.
Industrial and Commercial Rooftop Applications
- Idle Resource Utilization: Industrial and commercial rooftop photovoltaic power stations effectively utilize idle rooftop resources, generating social and economic benefits.
- Energy Consumption Complementarity: These stations complement the energy consumption of industrial and commercial entities, reducing energy expenditures while contributing to environmental protection and energy conservation efforts.
Keywords: Grid-Connected Photovoltaic Power Generation, Centralized Large-Scale Stations, Distributed Small-Scale Stations, Environmental Protection, Efficiency Enhancement, Strategic Development
