As the staff gently closed the grid-connected switch, the first individuals selling electricity in Tianjin began grid-connected power generation. Their power consumption and on-grid electricity will be calculated through smart meters in both directions, and will be settled separately. Dong Qiang, one of the first individuals to apply for an individual power selling business, will be settled on an annual basis to obtain his first profit from selling power to the grid.

Bidirectional meter installation completed

In the European and American towns of Europe and the United States, the first batch of applications for "Distributed Power Grid Connection" by Dong Qiang, Liang Jing, and Shen Xiangdong have completed the installation of power generation equipment. The dark blue solar panel rests on a silvery white shelf, like a pergola on the roof, which is both beautiful and practical. A white “windmill” is also installed on the roof of Dong Qiang’s home, which is located in the middle of the tower. It stands in the middle of the three roofs and forms a beautiful picture. “Mr. Dong’s home is a set of 3000 watts of wind power equipment and a set of 3000 watts of photovoltaic power generation equipment. Ms. Liang and Mr. Shen each installed a set of 3000 watts of photovoltaic power generation equipment.” Construction Party Red Eagle Energy Engineering Technology Minister Zhang Chongmei said.

Outside their villas, two-way metering meters have been replaced. “The residents’ home meter has been replaced with a two-way metering smart meter that can measure the quantity of purchased electricity and measure the amount of electricity on the grid.” The person in charge of the Tianjin Binhai power supply said, “In the future, this meter will be used as a measurement tool to buy electricity and sell electricity. At the same time, we also installed an electric meter for the residents to measure the total amount of electricity generated by new energy equipment. This meter will record the total generation of these photovoltaic equipment and wind power generation equipment, including self-use and on-grid electricity, for the accumulation of distributed energy in grids. research data."

Multi-channel protection ensures safety

In addition to changing the watch, Tianjin Binhai Power also built external power lines and ring cages for these new energy power generation equipment, connecting the power generation equipment to the transformer box so that the power generation can be realized in real time. "It is worth mentioning that we have done a lot of protective measures for grid-connected power equipment," said the person in charge of the coastal power supply. These groups of power generation equipment are equipped with "anti-island inverters", that is, they do not work to generate electricity when there are no electrical signals. “In the past, it was off-grid power generation. The electricity generated could be stored in the battery, or it could be used on its own, so it can generate power at any time without affecting the power grid.” Zhang Chongmei said, “It is now grid-connected power generation that will affect the entire power grid. Therefore, we have installed anti-islanding inverters. Once the external power grid is cut off, our power generating equipment will also stop working. This will prevent electrical shocks during grid overhaul and make the grid more stable.” At the same time, each household The power generation equipment has a control switch, and the three households also have a master switch, which is convenient for troubleshooting and sectional maintenance. In addition, this set of power generation equipment also has an automatic control system. In the event of a fault, it will automatically cut off the power supply and stop work to prevent the equipment failure from affecting the electricity consumption of residents.

Free choice of billing cycle

From the beginning of the formal connection to the network, Dong Qiang and his neighbors have already started to “sell electricity” to the power companies. According to the contract signed, their price of electricity was temporarily applied to the Tianjin coal-fired unit desulfurization benchmark on-grid price of 0.4118 yuan/kWh. In other words, if you sell 1,000 kWh, you can earn 411.8 yuan.

"Buying electricity and selling electricity are calculated separately. Usually, they use the electricity to purchase self-help products just like ordinary households, and the surplus electricity sold on the Internet will be cleared with the power company according to a certain period of time." said the relevant person in charge of Tianjin Binhai Power Supply. “According to the relevant regulations of the power company, residents can choose their own settlement period. The shortest is the settlement on January 1. The longest is the settlement on a one-year basis.” Dong Qiang, the first person to apply for an individual “selling power” business, said: “According to the forecast, My two sets of power generation equipment can generate 18 degrees per day, of which I have to sell all of the wind power generation on the Internet, photovoltaic power generation is for self use, and the rest of the electricity is used to access the Internet. More than 100 yuan, too much trouble, so I choose to settle once every six months."