Analysis of power generation cost of photovoltaic system Photovoltaic power generation has the characteristics of high initial investment cost and low operation and maintenance cost. In the economic analysis of photovoltaic power generation, the cost and benefit should refer to the total cost and total benefit in the life cycle of the photovoltaic system. Policy subsidies are an important factor that must be included in the analysis process and can offset some of the cost of grid-connected PV system construction.
Life cycle cost of grid-connected photovoltaic power generation system = investment cost + operation and maintenance fee – subsidy, investment cost of grid-connected photovoltaic system, including PV module, battery, inverter, power distribution cabinet, bracket, cable and other equipment and materials purchase fee, steel l Profile Supplier There are also construction construction fees and transportation expenses; operation and maintenance costs include operating personnel salaries, maintenance costs of electrical equipment such as inverters, cleaning costs of photovoltaic modules, etc. The operating period of photovoltaic systems is generally 20-30 years;The total amount of policy subsidies enjoyed during the construction and operation of the PV system.
Unlike coal-fired fuel power generation, which requires the purchase, transportation, storage of energy, and disposal of residues, the input energy to the photovoltaic system comes from the sun. During the operation period, the photovoltaic system does not require other energy sources and produces almost no residue. If the PV array is fixedly mounted, there are no fragile rotating parts in the PV system, and the main electrical equipment such as components have a service life of more than 20 years, and the maintenance workload of the system is also small. Therefore, the operation and maintenance cost of the photovoltaic system is significantly lower than the operation and maintenance cost of the conventional power generation system.
The efficiency of photovoltaic system is directly proportional to the amount of power generated, and the factors determining the amount of power generated by the photovoltaic system are the rated capacity of photovoltaic modules, the amount of solar radiation on site, and the efficiency of photovoltaic systems. The rated capacity of PV modules is the peak output power of PV modules obtained under standard test conditions. Since the field conditions are different from the standard test conditions, the actual output of PV modules depends mainly on the amount of solar radiation on site. In addition, the photovoltaic system output power should also be included in the impact of various losses and aging derating.
Photovoltaic power generation is very affected by the weather and cannot generate electricity on rainy days. Therefore, local weather should be considered when designing the system. For users who require electricity, they must also consider the number of days in continuous rainy days.