Construction of "Green Account Book" for One Hour Power | Shanghai Electric Power | Account Book
"The ecology of Shanghai has improved and there are more small animals, but it has added many difficulties for power inspection." On the eve of the first National Ecological Day, reporters visited multiple points of State Grid Shanghai Power and found that in the continuous integration with ecological protection in various aspects, many grassroots power personnel have gained a deeper understanding of "harmonious coexistence between humans and nature": reducing the harm of the power grid to animals, increasing the biodiversity of the power grid access, reducing fuel carbon emissions, and more technological innovation... In their minds, the "green ledger" behind every kilowatt hour of electricity to thousands of households in Shanghai is becoming more clear.
Found 1070 bird nests within six months
At the "Internet famous attraction" of Shanghai Qingxi Countryside Park, a row of electric poles on the roadside is not eye-catching, but upon closer inspection, they are fully armed: the bottom of the poles is surrounded by iron mesh to prevent contact between pedestrians and wild animals. The poles are equipped with snake proof nets, and there is a squirrel baffle near the transformer. The red bird repellent is also eye-catching at the top of the poles.
"In recent years, the ecology of Shanghai has continued to improve, with an increasing number of small animals such as rodents and snakes. There have also been multiple line trips caused by small animals approaching or damaging power facilities. Sometimes, we can also find corpses such as snakes and squirrels near the trip site." Liu Hao, an employee of the Operations and Inspection Department of State Grid Shanghai Qingpu Power Supply Company, told reporters that they have developed and installed protective covers and insulation barriers for different equipment based on the principle of blocking the climbing path of animals on towers, isolating live parts and grounding channels, reducing the possibility of discharge short circuits causing harm to small animals and synchronously improving the reliability of power supply to the power grid.
In response to the frequent presence of small animals near the Zhu 9 Wanlong and Tai 41 Dingjiagang power grid routes, State Grid has installed protective measures throughout both lines.
Due to the fact that power towers are generally more than 1 meter above the ground, and birds have a habit of building nests at high places, there are often bird nests built on power towers, which are actually a hidden danger to the operation of the power grid. Liu Hao revealed a set of data: from November last year to March this year, they discovered 1070 bird nests on power poles, including nationally protected species such as the red falcon and the pearl necked dove. "Especially in the autumn and winter seasons, once the bird's nest gets wet, it is easy to cause short circuits. In addition, the dense vegetation in suburban parks increases the risk of fire."
State Grid Shanghai Ultra High Voltage Company's line maintenance personnel climbed the tower to relocate the Bird's Nest to nearby green spaces, eliminating safety hazards
From bird repelling windmills to cross arm placeholders, from ultrasonic bird repellers to multifunctional bird repellers with sound, light, and electricity, power personnel have even attempted to install artificial bird nests along the power grid, all of which prevent birds from approaching power facilities, protect the safety of the power grid, and also protect birds.
Breeding and releasing nearly one million species of tail water organisms
During the construction process of the power grid, it is inevitable that it will have a negative impact on the local environment. To balance construction and ecological protection, Shanghai Electric Power Company is trying to make some additions.
"The area where the tower base of Chongming Power Transmission and Transformation Project is located is the mudflat of the National Aquatic Germplasm Resources Protection Zone of Coilia mystus, but the project construction will raise the maximum voltage level of the power grid of Chongming Island from 220 kV to 500 kV, which is of great significance to realize the power grid connection between Nantong, Jiangsu and Chongming, Shanghai." Chen Xianfeng, project manager of State Grid Shanghai Electric Power Construction Consulting Co., Ltd., introduced that in order to ensure the balance between construction development and water source ecological protection, the company has set up a special project for ecological environment protection within the mudflat of the protection zone, strictly implemented the requirements for environmental protection and water conservation, and tried to reduce the impact of construction on surrounding environmental vegetation, water areas, etc.
State Grid Shanghai Electric Power Construction Consulting Company launches a biological proliferation and release activity at the Yangtze River Estuary in Chongming
Under the guidance of relevant departments in Chongming District, State Grid Shanghai Electric Power carried out a biological proliferation and release activity at the Yangtze River Estuary of the 500 kV Chongming Power Transmission and Transformation Project at the Hengsha Fishing Port in Chongming, Shanghai. More than 7500 rouge fish, more than 60000 Chinese mitten crabs, and 800000 double toothed sand silkworms were released.
"After the release, we continue to track and monitor the effectiveness of the release, conduct ecological tracking on the fish fry samples that have been bred and released, collect data on the ecological distribution activities of the samples, and further optimize the second release plan in October this year." Chen Xianfeng introduced that breeding and releasing is also an important part of ecological compensation for the national level aquatic germplasm resources protection zone of the Yangtze River Codfish.
A single port reduces oil consumption by over 500 tons per year
"Previously, we used to use diesel generators, which were smoky and noisy. After using shore power, these troubles disappeared and energy consumption costs were reduced. Mr. Li, the ship owner, docked at the Dazhi Hexi Hub in Shanghai and was using shore power equipment for charging.". Having been engaged in shipping for nearly 20 years, we used to use diesel generators, but now we are gradually using shore power, which has effectively improved our living environment and costs.
As the name suggests, "shore power" refers to onshore electricity, which can provide electricity for the overall equipment of berthing ships, replacing oil with electricity, and meeting the electricity needs of production operations and crew members on board. The Dazhi River starts from the Huangpu River in the west and ends at the mouth of the Yangtze River in the east. The annual throughput of its western hub reaches 29 million tons. Installing a shore power system at the Dazhi River western hub is of great significance for air pollution prevention and improvement of the quality of the Yangtze River water source.
State Grid Shanghai South Power Supply Company has built 20 sets of shore power charging piles along the coast of the Dazhi Hexi Hub ship lock anchorage area
Since June 2022, State Grid Shanghai Electric Power has been carrying out the construction of the Dazhi Hexi Hub shore power system. The project combines the load capacity of berthing vessels and actual needs, and reasonably plans and builds 20 sets of shore power charging piles along the coastline of the berthing area, with a total capacity of 1200 kVA, which can simultaneously meet the electricity needs of 80 ships.
According to calculations, the annual electricity consumption of ships anchored at the port is about 2.304 million kilowatt hours. After the shore power system is put into operation, it can reduce fuel consumption by 541 tons, reduce carbon oxide emissions by 1687 tons, nitrogen oxide emissions by 5.5 tons, sulfur oxide emissions by 6.4 tons, and smoke and dust emissions by 1.16 tons per year.
Replacing traditional fuel powered auxiliary power generation with shore power not only helps reduce carbon emissions and environmental protection, but also brings considerable economic benefits to ships and shipowners. After visiting and researching the ship owners, it was found that the average cost of diesel auxiliary power generation for bulk cargo ships is 2.86 yuan/kilowatt hour. Based on an estimated shore power service fee of 1.64 yuan/kilowatt hour, the ship owner can save about 43% of their energy costs compared to traditional oil. The price advantage and sufficient supporting facilities are also attracting more and more ship owners to join the "oil to electricity" conversion.
At present, State Grid Shanghai Electric Power has completed the construction of 99 sets of shore power facilities, with a cumulative installed capacity of over 21000 kVA, achieving basic coverage of the main river channels.
24 green substations are gradually being put into operation
In addition to the green operation of the power grid, traditional substations also face the pain point of "ecological transformation", especially in areas such as wetland parks and ecological protection areas, where substations are no longer just cold "iron boxes".
In the middle of August, just after a rainstorm broke out in Maojiajiao Village, the staff began to check the infiltration of rainwater on the permeable road surface in Maojiajiao 110 kV substation. "Although the substation does not occupy a large area, there are still cases of ground hardening." Fan Rusen, project manager of State Grid Shanghai Qingpu Power Supply Company, introduced that the permeable pavement bricks laid on the internal roads of Maojiajiao Substation increase the rainwater infiltration of the road surface. The permeable pavement bricks can evaporate the water stored under the bricks through sunlight, adjust local temperature and humidity, and also have certain benefits for ecological microcirculation.
State Grid Shanghai Electric Power Company 110kV Maojiajiao Station
Maojiajiao Substation was put into operation in mid June this year and is one of the 24 green substations constructed by State Grid Shanghai Electric Power. The entire building of Maojiajiao Substation adopts prefabricated steel structure, and an integrated metal roof photovoltaic system has been piloted, which replaces traditional concrete roofs with stainless steel metal roofs and directly integrates photovoltaic power generation systems on the metal roofs. The conversion efficiency of this photovoltaic system is higher than that of ordinary photovoltaic systems under low irradiation conditions, and it has obvious advantages in the morning and evening periods and cloudy weather. For the first time, the station equipment also uses a mixture of sulfur hexafluoride and nitrogen as a substitute gas, reducing the use of sulfur hexafluoride by about 70%.
"We have also piloted the use of in-situ 3D printing technology for walls for the first time." Fan Rusen said that compared to traditional construction that requires the construction of templates and scaffolding, in-situ 3D printing technology can replace wet operations, saving labor, reducing consumables, and being cleaner and safer. In addition, Maojiajiao Station fully applies the "one click sequential control" system based on video analysis and intelligent recognition, reducing the operation time of a single line in the substation from live operation to cold standby state from the original 10 minutes to 2 minutes, and comprehensively promoting the Shanghai power grid equipment switching operation into the "second speed" era.
