Photo: State Grid Nanjing Power Supply Company

 On December 5, the vehicle-grid interactive integrated station for "photovoltaic storage, charging and discharging" in Nanjing ZTE Industrial Park, which was led by State Grid Nanjing Power Supply Company, was officially put into operation. It effectively improved the charging convenience in the core area of Yuhua District and the hub area of Nanjing South Station in Nanjing, and added further impetus to Nanjing's application for creating a national vehicle-grid interactive pilot city.

It is understood that the ZTE Industrial Park where ZTE Nanjing Corporation is located is in the core area of the Software Valley in Yuhua district, Nanjing, close to the transportation hub of Nanjing South Station. There are more than 9,000 cars owned by the permanent staff in the park, among which about 450 are new energy vehicles. Previously, there were only 21 slow-charging parking spaces in the park, which could hardly meet the charging needs of the employees in the park and the surrounding vehicles.

For this reason, ZTE Nanjing Corporation put forward its intention of cooperation to State Grid Nanjing Electric Vehicle Company, proposing to build a new intelligent energy integrated station in the park that combines multiple functions such as photovoltaic power generation, energy storage, charging and discharging. This station can not only meet the growing charging needs of new energy vehicles in the park but also achieve safe, efficient, green and low-carbon operation.

This station has a total of 21 charging parking spaces, equipped with 5 sets of integrated storage and charging equipment with a power of 320 kilowatts and an energy storage capacity of 261 kilowatt-hours (one machine with four charging guns), and 1 bidirectional charging and discharging pile with a power of 30 kilowatts for vehicle-to-grid (V2G). The total charging power reaches 1,630 kilowatts. On the top of the station, there is a photovoltaic canopy covering an area of 335 square meters, with a peak power of up to 99 kilowatts. It can generate about 110,000 kilowatt-hours of clean energy every year, which is equivalent to the daily electricity consumption of 4,400 ordinary households.

During the day, the photovoltaic canopy absorbs solar energy and converts it into electrical energy, which is used for self-consumption in the station for charging purposes, thus realizing the intelligent and green production and consumption of energy. During the off-peak period of electricity prices in the evening, the energy storage batteries store the electricity from the power grid for charging within the station during the day, effectively reducing the operation and maintenance costs. It is estimated that this station can reduce carbon dioxide emissions by approximately 88 tons and save about 33 tons of standard coal every year.

It is worth mentioning that this station is connected to the new power load management system. It can utilize the energy storage in the station to achieve effective interaction with the power grid. Meanwhile, it participates in green power trading, demand response and so on, and further passes on the expected earnings generated to the car owners who come to charge their vehicles. The most intuitive manifestation is that the charging price at this station implements time-of-use electricity prices, with the lowest price reaching 0.57 yuan per kilowatt-hour (from 0:00 to 8:00), which is 14 percent cheaper than that of other charging stations in the surrounding areas.

Currently, Nanjing is actively building itself into a national vehicle-grid interactive pilot city, and traveling in new energy vehicles has become a "new trend". Subsequently, more intelligent energy replenishment scenarios are also gradually being implemented and taking shape here. Up to now, State Grid Nanjing Power Supply Company has built a total of 289 charging stations across the city, including "photovoltaic storage, charging and discharging" charging stations, high-power supercharging stations, and geek spaces. The number of charging terminals exceeds 2,200, providing sufficient energy support for the public's green and low-carbon travel.