He Jijiang: The future of distributed photovoltaics under the energy internet

China Energy Storage Network News: On the 11th, the 2017 Beijing Energy Internet Integration Development Forum and Beijing Distributed Photovoltaic Resource Project Potential Release Matchmaking Conference was held in Beijing. He Jijiang, Director of the Policy Research Office of Tsinghua Energy Internet Innovation Institute, shared his views on "The Future of Distributed Photovoltaic under Energy Internet".

When introducing the relationship between energy internet and distributed photovoltaics, He Jijiang said that, first of all, energy internet is a new form of energy industry development that deeply integrates the internet and energy. Specifically, energy internet is reflected in cities in innovative urban planning, comprehensive energy planning, and architectural design methods, combining various renewable energy sources, smart grids, electric vehicles, and charging pile facilities to build and popularize low-carbon cities with low-carbon energy, low-carbon buildings, and low-carbon transportation.

Second, build a demonstration zone energy internet security data sharing platform and energy trading platform, use the energy internet's communication functions and various energy consumption big data to support smart city construction, encourage comprehensive demonstration zones to set strategic goals for renewable energy penetration, flexible resource ratios, etc., and encourage the development of 100% renewable energy distributed photovoltaics.

He Jijiang calculated that in Shunyi, there are 16,000 colored steel tile roofs with an area of ​​more than 500 square meters for industrial and commercial buildings, with a total area of ​​54.16 million square meters. There are more than 10 million square meters of concrete, totaling more than 60 million square meters. It is calculated to be 5 gigawatts. If it is installed at a high density of 123 watts per square meter, 60 million square meters can be installed with 77 gigawatts of photovoltaic power. Shunyi's urban and rural construction land is 263 square meters. We calculated that the roofs of public institutions are 1748698 million square meters, and the industrial and commercial roof area is 64566309 million square meters. The roof area accounts for 25% of the construction land.

"We believe that photovoltaics can be installed not only on roofs, but also outside roofs." He Jijiang used the example of a water treatment plant and a sewage treatment plant, using flexible brackets to pull steel wires to install distributed photovoltaics. For another example, a certain automobile factory of SAIC needs a lot of parking space. The parking place belongs to construction land, not roofs, and does not hinder the construction of photovoltaics. Similarly, photovoltaic carports can be built. "There are also a large number of carports in this park factory that are provided to employees' electric vehicles. I calculated that if this place has 20 megawatts of photovoltaics, if it can get 30 megawatts of photovoltaics, it can charge its employees at noon. Let him charge at noon through the Internet, because the electricity cannot be used up at noon, and use the photovoltaic electricity to charge, this is the energy Internet." He Jijiang said.

Talking about the photovoltaic corridor pilot project in Jiangsu Province, He Jijiang introduced that the total length of the road is 80 meters, the top width of the corridor is 15 meters, the column span is 10 meters, and the outward slope is 2.5 meters, totaling 1,200 square meters, with an installed capacity of 120W per square meter.

"I have another idea. Beijing can also build photovoltaic power on bicycle lanes to solve the problem of long-distance commuting by electric vehicles and bicycles, making it more convenient for everyone to travel. The roof can generate electricity and provide shade for everyone," said He Jijiang.

He Jijiang revealed that the cost of photovoltaic power generation is composed of resource acquisition cost, component cost, installation cost, microgrid system cost, and grid system cost. Currently, the acquisition cost is the highest. The cost of integrating distributed photovoltaic power generation into the microsystem is relatively low, and the system cost of the large grid is also relatively low. Distributed photovoltaic power generation is easy to build, easy to absorb, and easy to connect to the grid. He Jijiang suggested that Beijing should issue a tender and subsidies can also be flexible.

In addition, He Jijiang introduced that in cities, urban energy Internet has four elements: first, full coverage of distributed photovoltaics and more installations on construction land. Second, full coverage of electric vehicles. Third, the distributed photovoltaics in Zhangjiakou and Inner Mongolia should actively respond and absorb resources. Fourth, the platform should be coordinated through the Internet method.

He Jijiang also talked about the relationship between the Internet and distributed photovoltaics: First, the resource acquisition cost of distributed photovoltaics is relatively high, and the Internet should be used to reduce the acquisition cost.

Second, after the large-scale development of distributed photovoltaics in Beijing in the future, there will be problems with operation and maintenance, and a distributed photovoltaic operation and maintenance platform is needed, "similar to the role of Didi Photovoltaic Electrician. As long as you shake the phone, the electrician will come and complete all the procedures."

Third, the photovoltaic power generation trading platform, also known as direct green energy trading. Fourth, the photovoltaic financial platform, using the electricity revenue rights as collateral loans, because the electricity generated by photovoltaic installations is different from other electricity. As long as there is a certain amount of electricity, the power grid will provide you with electricity data, and you can use financing methods such as financial leasing, industrial funds, and equity crowdfunding.

Fifth, the photovoltaic power station trading platform. The development of distributed power stations requires a large amount of funds, and many people cannot afford this amount of funds. In the Internet era, through trading platforms, photovoltaics are gradually transferred from high-risk, high-return capital to low-risk, low-return capital.

He Jijiang finally talked about green energy trading. The biggest constraint of green energy trading units in the energy internet is the self-generated and self-used micro-grid. To make full use of Beijing's construction land resources and roof resources, we must engage in green energy trading and establish transactions for the development of distributed markets. "My point of view is not that users generate and use it themselves, but to balance the existing 350,000-watt power stations and 110,000-watt power stations to make full use of construction land resources and roof resources. By making full use of various types of construction land in urban and suburban areas, including roofs, parking lots, industrial land, and road photovoltaics, our Beijing distributed photovoltaics will definitely have a big breakthrough." He Jijiang said.

He Jijiang gave two suggestions to green electricity retail companies:

1. Local governments in pilot areas should formulate policies to encourage power sales companies to actively carry out green point retail of photovoltaic power stations in combination with local energy conservation and emission reduction plans and new energy development plans, and directly and actively cooperate in the settlement of green electricity direct transactions, the access of power sales companies, and the invoicing of network fees.

Second, the green electricity quota system should implement green electricity policies on the consumer side. In the future energy system, power stations will be coordinated through heat pumps and heat storage.

Editor: Shanshan