News

03

2019

-

04

The world's first million kilowatt level "water solar complementary" power plant was put into operation today

Classification:


【Summary Description】On June 25th, Red Star News learned from Yalong River Basin Hydropower Development Co., Ltd. that the Kela Phase I photovoltaic power station located in Garze Prefecture, Sichuan Province was connected to the grid for power generation today, marking the world's first million kilowatt level "water solar complementary" power station officially put into operation.

On June 25th, Red Star News learned from Yalong River Basin Hydropower Development Co., Ltd. that the Kela Phase I photovoltaic power station located in Garze Prefecture, Sichuan Province was connected to the grid for power generation today, marking the world's first million kilowatt level "water solar complementary" power station officially put into operation.

The Kola Phase I photovoltaic power station is the world's largest and highest altitude water solar complementary project, with an average annual power generation of 2 billion kilowatt hours. It can save over 600000 tons of standard coal and reduce carbon dioxide emissions by over 1.6 million tons annually. The Kola Phase I photovoltaic power station is connected to the main grid of Sichuan and is put into operation for power generation during the peak summer season, adding a new force to the power supply guarantee of Sichuan and Chongqing, and providing reliable power support for the Chengdu Universiade that will open on July 28th.

 

For the first time, the scale of complementary development of water and light has been increased to millions of kilowatts

The Kela Phase I Photovoltaic Power Station is located in Kela Township, Yajiang County, Garze Tibetan Autonomous Prefecture, Sichuan Province. It is a water solar complementary phase I project of the Yalong River and Lianghekou Hydroelectric Power Station. The highest elevation of the site is 4600 meters, with an installed capacity of 1 million kilowatts and an area of 25000 acres. The power station is connected to the Lianghekou hydropower station, which is 50 kilometers away and has an installed capacity of 3 million kilowatts, through a 500kV transmission line, to achieve photovoltaic power generation and bundled transmission of hydropower.

Water solar complementarity is a major feature of the Kola Phase I photovoltaic power station, providing an effective solution to solve the problem of new energy consumption. What is the development model of complementary water and light? This mode involves integrating photovoltaic power into hydropower stations, using the excellent regulation performance of hydropower to smooth out the fluctuation of photovoltaic output power. Taking Kola Photovoltaics as an example, when the lighting is good and the photovoltaic output is high, the Lianghekou Hydropower Station reduces the unit output and stores water; When the photovoltaic output decreases due to factors such as cloudy weather and rainfall, the Lianghekou hydropower station diverts water for power generation, increasing the hydropower output. Through the regulation of hydropower stations, the bundled water and light will output more stable electrical energy, which is more conducive to the safe and stable operation of the power system. At the same time, by using hydropower to mitigate the volatility of photovoltaic output, the power grid can also accept more photovoltaic integration into the power system and absorb more new energy.

The Yalong River Basin is not only the main energy base of the national strategy of transmitting electricity from west to east, but also an important energy base for ensuring power supply in Sichuan. The Kola Photovoltaic Project has increased the scale of water solar complementary development to millions of kilowatts for the first time. The complementary development of water and light in the Yalong River Basin, represented by Kola, will further drive the development of regional clean energy, create a new model for the integrated large-scale centralized development of renewable energy such as water, wind, and solar energy, and also help achieve the national "dual carbon" goal.

 

Carry out multiple technological innovations

Building a globally leading "digital" photovoltaic power station integrating water and light

As the world's largest water solar complementary project, the Kola Phase I photovoltaic power plant faces various challenges related to water solar complementary operation. A series of studies were conducted during the design phase of the project, including analysis of the complementary operation characteristics of water solar integration, demonstration of the scale of water solar integration development, and analysis of the operational impact of cascade power stations in the watershed. These studies laid a theoretical foundation for the complementary operation of water solar integration after the project was put into operation and the subsequent development of water solar energy storage integration projects.

Due to being located in a cold and high-altitude area, this poses difficulties for project construction and management. The project construction unit Yalongjiang Company optimizes the traditional operation and maintenance mode, integrates technologies such as artificial intelligence, cloud computing, and big data, and combines big data and AI algorithms to automatically identify faults and output diagnostic reports, achieving precise operation and maintenance of photovoltaic projects at the string level. The Kola Phase I photovoltaic power station adopts Huawei's new generation of "multi-dimensional perception" series inverters to achieve intelligent IV component diagnosis and build a comprehensive operational situation awareness capability.

The innovation of the operation and maintenance platform has also improved the operational efficiency of the project, achieving efficient, intelligent, and precise operation and maintenance control of high-altitude photovoltaic power stations, and creating a globally leading "digital" photovoltaic system that integrates water and light. What are the specific innovations? The Red Star News reporter learned that the Kola photovoltaic project has built an intelligent operation and maintenance platform, which for the first time applies the "cloud edge collaboration+operation and inspection separation+intelligent scheduling" mode, jointly with the intelligent execution terminal of the entire station, to achieve closed-loop management of "monitoring, control, and management"; Install intelligent cameras such as high point panoramic, thermal imaging, and facial recognition to achieve power plant safety warning; A drone intelligent inspection system has been built, utilizing advanced flight automation control and drone hangar technology. The infrared and high-definition visible light images automatically collected by drones are intelligently recognized to assist operation and maintenance personnel in quickly handling faults, effectively solving the problems of wide distribution, large quantity, and low efficiency of manual inspection of power plant equipment.

Shen Zhanfeng, Deputy Director of the National Remote Sensing Application Engineering Technology Research Center, stated that as the largest photovoltaic project in Sichuan Province, the Kola Phase I photovoltaic power station adopts advanced technologies such as intelligent tracking closed-loop control and cloud computing to effectively increase the power generation of the power station; Building an intelligent operation and maintenance platform to achieve precise operation and safety warning, the accumulated experience provides useful reference for the construction of high-altitude clean energy projects in China.