What's the limitations of solar photovoltaic power plant today?

Everything always has two sides. There are too many article introduces the advantages and advantages of photovoltaic power generation, here it is necessary to point out that some of the limitations of photovoltaic power generation. Solar energy density low, poor stability of weakness, and geographic distribution, seasonal change

there are always two sides to everything. At present, this paper introduces the advantages of photovoltaic power generation and the superiority of the article is too much. It is necessary to point out that some of the limitations of photovoltaic power generation. Solar energy density low, the shortcomings of poor stability, and by geographic distribution, seasonal change, the influence of such factors as the alternation of day and night. Photovoltaic limitations include the following aspects: 1. Time limit. Due to the conditions of the photovoltaic power generation is when the sun came out, photovoltaic devices can work normally to generate electricity. As a result, the night of the year, spring, summer, autumn and winter load has a great influence of photovoltaic power generation. In response to this situation, the grid must be equipped with corresponding capacity under rotating standby generator. 2. Geographical restrictions. Basically can only adhere to the building photovoltaic equipment for installation and construction, this is known as the local power supply of photovoltaic roof. If you leave the building to build a photovoltaic power generation, will greatly increase the cost or damage the environment and ecology. 3. Meteorological conditions. The influence of climate on photovoltaic power generation. When using photovoltaic (pv) grid power without battery, if a city's climate change is very big, power load will be volatile. Empty sky of a city's air quality, such as air pollution, or deterioration of visibility, such as fog, cloudy day, etc. , can make the photovoltaic or online real-time output decline. 4. Transmission capacity restriction. After solving the problem of the cost of photovoltaic power generation, because of the photovoltaic power generation does not have the rotational inertia of the traditional motor, speed governor and excitation system, high power, high voltage, and from the desert to the load center of long-distance transmission will bring new economy and to ac power grid stability. Either ac or DC high voltage power for long distance power transmission in desert areas, because of the limitation of the above 1, 2, 3 per kilowatt of transmission cost will greatly increase. The question will be discussed below. 5. Light energy conversion efficiency is low. With the traditional energy, The fossil energy, petroleum, hydropower, nuclear, etc. ) Compared to the conversion efficiency. ) Photovoltaic energy conversion efficiency is not satisfactory.