Introduction to the advantage of off-grid power generation system

By the biomass energy, hydropower, wind power and solar energy and so on several common contrastive analysis of the new energy, can clearly draw the solar energy light electricity generation v has the following unique advantages: 1) Photovoltaic (pv) power generation has economic advantages. Can look from the two aspects of solar energy utilization of economic

by the biomass energy, hydropower, wind power and solar energy and so on comparing and analyzing several common new energy may reasonably arrive at the solar photovoltaic power generation has the following unique advantages: 1) Photovoltaic (pv) power generation has economic advantages. Efficiency of solar energy utilization can be in two ways. One is the solar energy is inexhaustible, in accepting the solar power will not be collected. Taxes; , can be used in any place; Second, the current technology development level, some solar energy utilization has become the economy. With the development of science and technology and breakthrough of the human development and utilization of solar energy, solar energy utilization of economy will be more obvious. If the 20th century is the century of oil, then the 21st century is the century of renewable energy ( The century of solar energy) 。 From solar photovoltaic power plant construction costs, with the large-scale application of solar photovoltaic power generation and the promotion, especially in mature industries and upstream silicon photovoltaic power generation technology, as well as building roofs and walls platform of compound development and utilization, solar photovoltaic power generation in 2015 per kilowatt construction cost is 5000 - 10000 yuan, and other renewable energy sources are equally economic advantage. 2) Solar energy is an inexhaustible, inexhaustible renewable energy, have a large number of available energy. The sun is about 1023 kilowatts of energy per second. Six times, including the energy reaches the earth up to 8 times; 1013 kilowatts, equivalent to six times; 109 tons of standard coal. According to this calculation, the amount of solar energy reaching the earth's surface in a year is equivalent to 1 of standard coal. 892 times. 101. 3 billion tons, is the world's major energy has proven reserves of 10000 times. The service life of the sun for at least 4 billion years. Compared with human history, the solar energy will continue to supply to earth's time is infinite, it determines the development and utilization of solar energy will be the most effective way to solve the shortage of conventional energy, and dried up. From the perspective of the resources of our country can develop, scholars and experts agree that number is: biomass of 100 million kilowatts, water and electricity. 3. 7. 8 billion kilowatts of power, wind power 2. 2 5. 3 billion kilowatts, and solar energy. 1 trillion kw, and only 1% of the solar energy resources need to be developed to reach 21 billion kilowatts; From the point of proportion, biomass accounted for 0. 46%), wind (1. 74%, water and electricity for 1. 16%, photoelectric accounted for 96. 64%. 3) No pollution to the environment. Clean energy such as solar and wind energy, tidal power, almost don't produce any pollution in the process of development and utilization, reserves, is the ideal alternative energy sources. Because the traditional fossil fuel ( Coal, oil and natural gas) In use process produces a large amount of toxic and harmful substances, causing serious pollution of water, soil and atmosphere, the greenhouse effect and acid rain formation, which cause serious damage to human survival environment and health, developing new clean alternative energy sources is imminent. Solar energy as a relatively ideal clean energy, more and more get the attention of the countries all over the world. From the point of the carbon emissions of various generation, the upstream link not calculation: coal of 275 gram, gas-electric 204 grams, 181 grams, gas electricity wind 20 grams, solar photovoltaic power generation is close to zero emissions. In addition, the power generation process without waste residue, waste, waste water and exhaust emissions, no noise, do not produce harmful substances to human body, do not pollute the environment. 4) Convert links at least directly. From the point of energy conversion link, photovoltaic convert solar energy into electrical energy directly, is that all the renewable energy conversion in the least, using the most direct. In general, the energy flow in the whole ecological environment, with the increase of conversion links and the extension of conversion chain, energy loss of geometric will increase, at the same time, greatly increased the construction and operation cost of the whole system and instability. At present, the real conversion efficiency of crystalline silicon solar cells between 15% and 20%, the highest level of laboratory has reached to 35%.