The futurist Ray Kurzweil recently stated that although photovoltaic power generation now accounts for only 1% of total power generation, according to the rate of development of photovoltaic power generation in the past decade, it is expected that photovoltaic power generation in 2031 can meet all global power needs.
So, how can we solve the problem of photovoltaic technology that has not yet been overcome?
The two new reports mentioned below indicate that photovoltaic power generation has taken a dominant position in some specific regions, and corresponding measures and recommendations have been proposed for increasing the proportion of photovoltaic power generation in the world.
Last month, the International Energy Organization (IEA) Photovoltaic Power System Department released the latest research report "The Popularization of Photovoltaic Power in Local Distribution Networks". The report adopted many case studies and proposed a solution for the integration of large-capacity photovoltaic power generation in the local grid with technical feasibility and economic feasibility.
The report learned from the study of 11 countries to develop photovoltaic power generation experience, these countries are: Australia. Austria, Belgium, China, Germany, Greece, Italy, Japan, Spain, Switzerland, and the United States.
Throughout the above countries, the proportion of photovoltaic power generation is as small as less than 1% (Austria, China, Japan) as large as about 6% (Germany, Italy). However, in some local areas, especially in the peak period of photovoltaic power generation, the ratio will be higher.
For example, the island of MagnÃ©it in Australia has a high rate of 34% at the peak of photovoltaic generation. Margate Island is located on the northern side of Queensland, Australia, and its electricity load is up to 5MW. Even 75% of the capacity of a distribution transformer on the island comes from photovoltaic power generation.
These cases can provide practical operational and operational experience for grids containing large amounts of photovoltaic power. For example, through many cases, you can learn how to plan and operate the power grid by controlling the inverter.
Power system "paradigm shift"
Another report, entitled "The Transformation of Distribution Networks from One-way to Two-way," was written by the IEA. In the report on the reconstruction of distribution networks, the report converts the distribution network from one-way transmission of power to two-way transmission between homes and power suppliers that install solar panels.
â€œThe greater the power from homes equipped with solar panels to electricity suppliers, the less electricity the traditional generators need to produce. The lower the unit price, the more paradigm shift in the power system.â€ The photovoltaic industry association and the report author of the Fraunhofer Institute for Wind Energy and Energy Systems Technology in Germany wrote.
â€œThis also shows that although in some countries, the grid has connected a certain amount of photovoltaic capacity, but photovoltaic power generation is still not fully embedded in the overall operation of the power system. In the case of traditional power plants not working, photovoltaic power generation is insufficient. In order to ensure the safe and stable operation of the power system, while photovoltaic power generation is gradually becoming the mainstream, how to better integrate photovoltaic power generation requires further study.
Although photovoltaic power plants are technically capable of providing a variety of such supporting services - including frequency control, voltage regulation, grid management, and black start - but the report also states, "Usually, only by overcoming certain regulatory barriers can we The transition from one ancillary service to another has also hindered the development of photovoltaic power in the past."
This reason may explain why IEA set the proportion of PV in global power generation in 2050 to 16%. Although this goal is not as ambitious as Kurzweil said, it may be more realistic.
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