How to improve the efficiency of the photovoltaic power generation?

Because the efficiencies of photovoltaic power generation system is changing together as irradiation intensity, irradiation, the lower the efficiency is lower, also irradiation of 1000 w/m2, efficiency loss less than 5% ( This is, of course, the temperature is not high season) ； This is due to what

because the efficiencies of photovoltaic power generation system with the changing of light intensity, so the radiation efficiency is lower, the lower the efficiency. When radiation of 1000 watts per square metre, efficiency loss less than 5% ( Of course, this is the temperature is not high season) ； What reason is this? Mainly include the following: 1. The wastage of the components, inverter, cable, etc. Not as linear change as we imagine. 2. When radiation is low ( Cloudy or rainy day) When there is a stage is a group of bunch of voltage is too low, inverter cannot start; ( Radiation dose is cumulative) 3. Inverter has certain consumption ( Consumption changing with load is small) , which accounted for a significant proportion of electricity under low radiation, results in the decrease of system efficiency. How to calculate the peak sunshine time? How to calculate the efficiency of photovoltaic power generation systems? Peak sunshine time: refers to the values of instantaneous irradiation after converted to the cumulative number of hours of parameters, to evaluate the theory of a period of time and irradiation intensity; Can be easily calculated by using this value system efficiency. The precision of the value depends on the weather station and its sampling accuracy of the algorithm. The system efficiency algorithm ( x) : power generation ( KWH) / capacity ( Kw) / peak sunshine time ( Hours) / 100 = x % steps and enhance the efficiency of the power station the entire life cycle method is what? 1. Power plant should be considered for the optimization design of the whole life cycle, operation maintenance team should be involved in the design phase, operation maintenance convenience and economy of the late to think ahead; 2. Three parties should be introduced, inspection institutions and construction supervision company, strict control of power plant equipment quality and construction quality, especially harsh outdoor environment under the condition of long-term reliability of the system. 3. Shall establish regional operation maintenance center, in order to reduce the operation maintenance cost of a single distributed power station project. 4. Actively explore different areas of plant parts cleaning key points, to achieve maximum power generation and clean the comprehensive benefit; 5. Practical problems in the process of operation maintenance should be feedback to design as soon as possible, to continue to follow-up and optimization scheme.