This year’s wind power shutdown 77 times, the hourly wage for the completion of the 3rd DC connection line… The Ministry of Commerce, Industry and Energy notice is revised, enabling solar power shutdown
In Jeju, which has been expanding the supply of new and renewable energy by advocating a’island without carbon’, there is a series of forced’Shut Down’ of renewable energy generators due to excessive power production. As the shutdown of solar power along with wind power becomes possible, the number of shutdown cases is expected to increase.
According to the Jeju Headquarters of the Electric Power Exchange on the 29th, as of December 25th this year, Jeju wind turbine power generation was forcibly stopped (shutdown) 77 times.
Wind power generator shutdowns in Jeju are showing an increasing trend: ▲3 times in 2015 ▲14 times in 2017 ▲46 times in 2019.
The reason is the excessive production of electricity.
Jeju electricity consumption has steadily increased every year, recording a total of 5374GWh in 2019. In 2009, electricity consumption increased by more than 2000GWh from 3352GWh.
As power consumption increased, new and renewable energy emerged, and many new and renewable energy generation facilities such as wind power, wave power, and solar power began to be built in’Clean Jeju’ a few years ago.
The proportion of renewable energy generation facilities, which accounted for 9% of the proportion of power generation facilities in the province in 2009, increased to ▲10% in 2013 ▲22% in 2015 ▲27% in 2017 ▲49% in 2019.
The share of renewable energy generation is also showing a steadily rising trend from 3% in 2009 to 9% in 2015 and 13% in 2017 and 19% in 2019.
However, as solar power production increases, the shutdown of wind power continues.
As of August this year, the power generation facilities for the solar power generation project in the province amounted to 690.7MW on a site of 1,055,7484㎡.
The number of new permits by year is ▲44 cases in 2016, area 300,000,227㎡, capacity 20.2MW ▲293 cases in 2017, area 1.616,000㎡, capacity 108.7MW ▲612 cases in 2018 area 3.8720,000㎡, capacity 221.1MW ▲ In 2019, there were 278 cases, an area of 1.069666㎡, and a capacity of 82.2MW.
Until August this year, 205 new solar power facilities with an area of 84,4181m2 and a capacity of 72.9MW were newly licensed.
Most of the renewable energies in the province are produced and consume electricity at the same time.
In order to store the generated power, an energy storage system (ESS) is required. Investors of solar power generation facilities are reluctant to use the ESS facility itself, as having expensive ESS equipment reduces the expected profits from solar power facilities. have.
It’s okay in summer and winter, when power consumption is high due to increased use of air conditioning and heating, but spring and autumn are a problem.
Typically, power consumption is low in spring and autumn, but power is continuously produced at renewable energy generation facilities, leading to shutdown of wind turbines. This is because failure to control the amount of power generation leads to overload of related facilities.
As wind turbine shutdown continued, the government pulled out a shutdown card for the solar facility.
In the case of shutdown, when the power exchange is concerned about overproduction, it requests KEPCO to cooperate with the shutdown.
As the Ministry of Trade, Industry and Energy revised the notice, and KEPCO revised the relevant regulations this year, it became possible to shut down solar power generation facilities from this fall.
In the case of solar power generation facilities, if the power generation capacity is 500kW or more, automatic opening and closing devices are installed, enabling remote control of KEPCO. However, due to the frequent cloudy days in Jeju this fall, the amount of electricity produced by the solar power generator decreased, and there was no shutdown for solar power.
It seems urgent to prepare fundamental countermeasures as the number of new and renewable energy-related facilities in Jeju is expected to increase further, such as the expansion of new and renewable energy with the goal of zero carbon dioxide emissions by 2050 by the government.
According to the ‘9th Basic Plan for Power Supply and Demand (2020~2034),’ announced by the Ministry of Trade, Industry and Energy, the completion of the 3rd direct current linkage line connecting Jeju and Wando is urgent.
The first connection line (150,000 kW class) built in 1998 and the second connection line (250,000 kW class) installed in 2014 are used to draw electricity from the Korean Peninsula to Jeju. The first connecting line can send power from Jeju, but it cannot exchange power at the same time.
In the case of the third connection line, which is promoted by a submarine power cable that connects Wando and Jeju, about 122 km, it is planned in both directions to exchange power at the same time. The plan is to transfer new and renewable energy produced in Jeju to the Korean Peninsula.
Although the third linkage line is aimed to be completed in December 2022, the residents of Wando have formed the’People’s Countermeasure Committee on the Transformation Station between Wando and Jeju’ and are strongly opposed to the installation of high-voltage transmission towers.
In this regard, a KEPCO official said, “As the days when renewable energy is being overproduced frequently, wind turbine shutdowns occurred 77 times this year. It was expected that there would be a shutdown case for solar power generation facilities from the fall of this year, but there is still no shutdown of the solar power generation facilities due to weather or other conditions.”
“In accordance with the basic power supply and demand plan, the amount of generation of new and renewable energy in Jeju is expected to increase. There is a need for a system that can consume over-produced power, such as transmitting it to other regions. “We will respond to excessive production of new and renewable energy through the timely completion of the 3rd linkage line.”
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