Service "Zero Carbon Winter Olympics"

In the construction site of the Zhangbei converter station of the renewable energy flexible DC grid test demonstration project, the bunting flag waving in the wind clearly circled the construction scope, the civilized construction signboard and the safety warning sign were hung in a conspicuous position, and the construction workers and supervisors were busy. Ordered large-scale excavators and pile drivers in the field. With the rhythm of rhythm, a song of the laborer played in the first line of service "zero carbon winter Olympics".

With the end of the Pyeongchang Winter Olympics, the world's ice and snow festival will enter "Beijing time." On April 22, State Grid Corporation and the Hebei Provincial Government signed the "Framework Agreement for the 2022 Winter Olympics Power Grid Construction Cooperation", and fully committed to serving the "zero carbon winter Olympics" commitment. As the key unit to undertake the power supply of the Winter Olympics, State Grid Yubei Electric Power Co., Ltd. closely tracks the infrastructure construction of the Olympic venues and the overall development of the competition area, comprehensively combs and analyzes the planning, construction and operation status of the Zhangjiakou competition area and surrounding power grids, and strives to build The Winter Olympics will support the “six major projects” of the power grid. The power security work of the 2022 Beijing Winter Olympics was officially transferred from “planning construction” to “comprehensive construction”.

“Zero Carbon Winter Olympics” demonstrates the full strength of clean development

In Zhangbei County, Hebei Province, which is more than 200 kilometers away from Beijing, there is a plateau with unlimited scenery. There are a number of wind turbines stand out, rows of rows of solar photovoltaic panels, and the world's first new energy comprehensive demonstration project integrating wind power, photovoltaic power generation, energy storage system and intelligent power transmission. In the past, it was transformed into a “energy food” that promoted development, and it was continuously delivered through a series of silver lines, benefiting the distant places.

The Zhangjiakou area is rich in renewable energy resources. The installed capacity of new energy equipment that has been developed and planned is huge. It is estimated that by 2020, the installed capacity of new energy in Zhangjiakou will reach 20 million kilowatts. In the face of resource "treasures", State Grid Power North has fully utilized its location advantages, deepened the potential of new energy development, and strengthened technical research in key areas, so that clean development has full confidence.

Looking at the Zhangjiakou area, achieving “zero carbon” in various fields is an unattainable goal. However, in the State Grid Corporation, in the face of the "zero carbon winter Olympics" commitment, the State Grid North Power is full of confidence.

On February 28th, just after the Spring Festival, the construction site of Zhangbei Renewable Energy Flexible DC Power Grid Test and Demonstration Project was already in full swing. On this day, the State Grid Corporation organized a mobilization meeting for the Zhangbei Soft Project, marking the official start of the world's highest voltage level and maximum flexible DC project. In the sub-meeting station of Zhangbei Converter Station, dozens of red flags were welcoming the wind and the momentum was magnificent. All kinds of large-scale construction machinery were lined up and waited for, and the construction team composed of more than 200 people was assembled and ready to go.

The world's first four-terminal ring-shaped flexible DC power grid, which transports large-scale wind power, photovoltaic, pumped storage and other energy sources, can effectively solve the problem of renewable energy transmission and consumption in Zhangbei, and promote intensive development and clean energy of large energy bases. Efficient use, improve the ability of clean energy delivery and acceptance in the Beijing-Tianjin-Hebei region, and high-quality service demand for green winter Olympics in 2022. As the main construction management unit, the State Grid Yubei Electric Power Co., Ltd. has overcome a series of complicated problems such as tight construction period, large scale, and high cold in winter, and strives to demonstrate the role of Weibei in the demonstration. Liang Ji, director of the company's development planning department, said: "After the project is put into operation, it can realize multi-point collection and delivery of large-scale renewable energy, efficient use of clean energy and flexible consumption, and source network coordination of renewable energy generation. Friendly interaction, solving the problem of clean energy 'not on' can't deliver the 'difficult to absorb' problem, fully supporting the new energy development of Zhangjiakou and the green low-carbon supply of power in the Yanqing area of ​​the Winter Olympics."

In recent years, the State Grid Yubei Power has intensively cultivated this excellent "test field" in Zhangjiakou, and has produced a wave of fruitful results. A series of key technologies such as virtual synchronous machines, large-scale new energy grid-connected, and energy storage battery ladder utilization have made significant scientific research advantages and achieved major breakthroughs, gradually stabilizing the international leading position.

"Four nine" and "five nine" to ensure reliable power supply

Zhangjiakou Power Grid is responsible for the important task of “West-to-East Power Transmission” and new energy transmission. Due to the geographical location and power grid structure, the connection between the 500 kV grid in the region and the grid of the Zhangjiakou competition in the Winter Olympics is weak, and there is a bottleneck in the power supply support. According to the prediction of the professional and technical personnel on the load of the Zhangjiakou Chongli Olympic Games, during the Winter Olympics in 2022, the Chongli area will reach 9 times the existing load.

To ensure the high reliability of the power supply in the Olympic Games, it is the main principle of the “Zero Carbon Winter Olympics” of the State Grid Power Service. Regarding high-reliability power supply, State Grid North Power gave the clearest and most intuitive explanation: the reliability of power supply in the Olympic Games area reached 99.999%, and the reliability of power supply in Chongli City System reached 99.99%. The goals of “five nines” and “four nines” need to build a strong and reliable main grid and a flexible and intelligent distribution network.

In order to improve the power supply level of 500 kV power supply in the competition area and meet the requirements of high reliability power supply, State Grid Yubei Power will focus on strengthening the main grid upgrade in Zhangjiakou area, building a 500 kV power transmission and transformation project and Hongqiying and ancient poplar 220 thousand The power transmission and transformation project, as well as a series of 220 kV transmission lines, constitute a 220 kV double loop network power supply structure. “After the completion of the project, the newly-built Jiefang Station and the existing Wanquan Station and Zhangnan Station will form a 500-kV high-reliability power supply network in the Olympic Games area to break the bottleneck of power supply support.” State Grid Weibei Power Winter Olympics Deputy Director Lei Weimin said with confidence: "In this way, the Olympic Games will be powered by a dual 500 kV power supply. If a single power supply fails, the normal power supply during the Winter Olympics will still be guaranteed."

The distribution network is the end of the power grid and is directly connected to the major venues of the Winter Olympics. “As early as 2016, the State Grid Yubei Power has made a lot of explorations on the construction of intelligent distribution network.” Yan Chaoyun, director of the operation and maintenance department of the company, said, “At present, the construction project of smart distribution network demonstration zone has been launched in Qinhuangdao area. It has the advantages of grid structure optimization, power supply capacity improvement, demonstration role, and management mode innovation. Now we have summarized a set of experiences that can be borrowed, copied, and promoted, and are ready to be applied in the Zhangjiakou Winter Olympics area."

During the Olympics, the State Grid Yubei Power will adopt the structure of “Double Ring Network + Contact Ring Network Unit” to ensure the power supply of all four important venues and media centers, and cooperate with the “information and automation” fault handling methods to improve the distribution network. The level of fault research and evaluation improves the operation and maintenance efficiency of the equipment, reduces the repair time, and realizes high reliability power supply.

Service Huimin adheres to the tenet of "the people's electricity industry is the people"

Dongyaozi Town in the northwest of Qiaoxi District of Zhangjiakou City is a small town with a land area of ​​only 90 square meters, a resident population of 13,800 people and 19 administrative villages. However, when the spring breeze of Winter Olympics blew through here, green development and service for the benefit of the people became a hot topic often mentioned by the villagers.

“In the past, we were here to burn coal-fired boilers. The dark black coal smoke polluted the air seriously. The window frames in the house were black coal ash.” Li Xianwen, a villager from Dongyaozi Village, Zhangjiakou City, said, “Now, the temperature in the house is always 25 degrees, 5 degrees higher than the hottest time in the past, the house is clean, the sky is more blue!" The first heating season after "coal to electricity", Li Xianwen praised this clean and efficient heating method Absolutely.

At present, Dongyaozi Town has become a “provincial renewable renewable energy demonstration village”. The central heating project of thermal storage electric boiler, which is promoted by Guobei Power, is the first electric energy substitution demonstration project in the country to participate in market-oriented transactions. The project innovation adopts the PPP commercial operation mode, which effectively solves the problem of insufficient government investment in public service funds, and has significant environmental protection effects and demonstration effects. The company actively promotes the environmental protection characteristics of existing coal-fired boilers and water source areas in the administrative jurisdiction of Dongyaozi Town Government, and actively promotes the cleaning of coal-fired heating districts, enterprises and institutions and new energy-saving buildings within the jurisdiction of Dongyaozi Town Government. Renovation of energy supply, active service to people's livelihood, and efforts to create a clean energy and environmentally friendly town, the "people's electricity industry for the people" corporate purposes have been best reflected here.

"At present, the cleaning and heating work in Zhangjiakou area is gradually being pushed forward. By 2019, we will be able to achieve clean heating along the winter Olympics welcome corridor, the competition area and the Chongli Winter Olympics logistics support base; by 2021, realize Zhangjiakou Chongli District, Xuanhua District, Xiahua District, Huailai County - 'three districts and one county' clean heating." Lei Weimin said.

Relying on the “resource-rich mine” in Zhangjiakou area, the State Grid Yubei Power communicated with the Zhangjiakou Municipal Government, actively promoted the localization and consumption of renewable energy, and established a renewable energy power trading platform to explore and build a “Government+ Grid Company”. + "Enterprise + User" "Quadruple Collaboration Mechanism". During the heating season from 2017 to 2018, the total electricity consumption was 134 million kWh, effectively reducing the energy cost of electric heating users, improving the level of renewable energy consumption, and achieving the win-win situation of business operation benefits, social environmental benefits and user benefits. .

In addition to cleaning and heating, State Grid Yubei Electric fully considers the travel needs of athletes and tourists during the Winter Olympics, and closely integrates the road traffic and urban development planning of Zhangjiakou area to create an interconnected car network, so that full coverage of charging and any line of electric trains . "Only in 2018, we are preparing to build 150 electric vehicle charging stations and 1,223 charging piles, and strive to build a group of electric vehicle charging stations in the Olympic area." Du Weizhu, director of the State Power Network's power marketing department, pointed to the map, "2020 years ago. The radius of public charging service in key areas will be less than 1 km."

Expanding the scope of vision, Guowang Power not only provides convenient services for green travel in the competition area, but also plans high-speed railway supporting projects to build power supply projects for three electric traction stations of Beijing-Zhangjiao High-speed Railway and Chongli Railway for Beijing-Yanqing-Zhangjiakou The transportation service between the venues of the Winter Olympics provides strong power protection.

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