The installed capacity of regional new energy in the Southern Power Grid exceeded 100 million kilowatts

The first phase of the integrated optical storage and charging project with the largest installed capacity in China''s offshore oil and gas equipment manufacturing field was successfully connected to the grid in Zhuhai, Guangdong Province. The outdoor photovoltaic panels of the first phase of the project cover an area equivalent to 100 standard basketball courts. The picture shows the corner of the project. Photo by Liu Cong

China''s largest installed capacity in the field of offshore oil and gas equipment manufacturing optical storage and charging integration project phase I recently successfully connected to the grid in Zhuhai, Guangdong province, is expected to generate 7 million KWH of green electricity per year, equivalent to reducing carbon dioxide emissions of 5,506 tons. The project is invested and constructed by Nanwang Energy (6.340, -0.10, -1.55%) company and implemented in three phases. The installed capacity of the first phase project is 6.5 MW, and the photovoltaic panel covers an area of 42,000 square meters.

As of the end of July, the total installed capacity of new energy in the operation area of the Southern Power Grid exceeded 100 million kilowatts for the first time, reaching 103.32 million kilowatts, accounting for 25% of the installed capacity. Among them, new energy has become the second largest power supply type in Guangxi and Yunnan Province (region). From January to July 2023, new energy generation in the southern region was 87.5 billion KWH, an increase of 37.4%, and the utilization rate of new energy exceeded 99.9%.

Since the beginning of this year, with the price of raw materials such as photovoltaic modules falling and the gradual rationalization of land and electricity price policies, new grid-connected installations of new energy in the southern region have begun to accelerate. Data show that in the first half of the year, Yunnan added 7 million kilowatts of new energy installed capacity, the total installed capacity of new energy exceeded 20 million kilowatts, and Guangxi scenery new energy installed capacity reached 19.48 million kilowatts, accounting for 29% of the total installed capacity of all types of power supplies in the region, becoming the second largest power supply type in the province (region).

In order to promote new energy production as soon as possible, the Southern Power Grid issued a series of documents such as the Service Manual of the New energy Power generation Project of the Southern Power Grid Company (Trial), the New Energy Service Guide of the Southern Power Grid Company, and the Distributed photovoltaic grid-connected Service Business Guide of the Southern Power Grid Company, strengthening the coordination planning of the source network, promoting the online handling of the new energy grid-connected business, and focusing on protecting the investment in the new energy supporting grid.

With the increasing penetration rate of new energy, the power supply structure has gradually changed, and the power supply balance, security and stability control and other scheduling services face more challenges of volatility, intermittency and uncertainty. Yunnan power grid three top professional and technical expert He Tingyi said that the new energy units are mostly based on power electronic converter access to the grid, its transmission power and grid frequency decoupling, can not actively provide frequency support to the system, the frequency stability problem is prominent, especially after the Yunnan power grid and the Southern power grid asynchronous network, the frequency fluctuations under the small disturbance lack of fast frequency modulation means. Exacerbates the frequency stabilization problem.

As a flexible and adjustable resource, pumped storage plays an increasingly significant role in ensuring power supply and promoting the consumption of new energy. On July 26, the maximum power load of the Southern Power Grid reached 234 million kilowatts, the fifth record high this year. On the same day, the daily output of seven pumped storage power stations in five southern provinces exceeded 50 million KWH for the first time. At present, the Southern Power Grid Company is speeding up the construction of pumped storage power stations, and four pumped storage power stations are under construction, with a total scale of 4.8 million kilowatts.

Wang Haohuai, manager of the power dispatching control center of the Southern Power Grid, said that in order to promote the high-quality development of new energy, the Southern Power Grid will give full play to the role of the power grid resource optimization platform, by strengthening the capacity construction of new energy "three can" (observable, measurable, controllable), accelerating the construction of regional power market and accelerating the new energy storage, pumping and storage and other regulatory capacity building means. Continue to improve the absorption capacity of new energy access in the large power grid, do a good job of "ensuring supply" and "ensuring consumption", and escort the realization of the "double carbon" goal and the construction of a new power system.

According to the plan, in the whole year of 2023, the five provinces and regions operated by the Southern Power Grid plan to put into operation 28.47 million kilowatts of new energy, an increase of 63% over the new scale in 2022.