Recently, the National Development and Reform Commission, National Energy Administration and other four departments jointly announced the first batch of pilot cities and projects for large-scale application of vehicle network interaction in China, with a total of 39. Nine cities including Shanghai, Changzhou, and Guangzhou, as well as 30 projects in Beijing, including the V2G vehicle network interactive collaborative regulation pilot based on new energy storage, are included in the pilot scope. Simply put, vehicle network interaction is the embodiment of new energy vehicles as "power banks", exchanging electricity with the power grid. With the support of bidirectional charge discharge (V2G) technology, new energy vehicles are charged in an orderly manner during low electricity consumption periods; During peak electricity usage, reverse the electrical energy from the battery to the grid to provide power support. According to data released by the Ministry of Public Security in January this year, as of the end of 2024, the number of new energy vehicles in China reached 31.4 million. The large-scale and disorderly charging of new energy vehicles will bring enormous pressure to the balance of supply and demand in the power system, and the necessity of large-scale promotion and application of vehicle network interaction is becoming increasingly prominent. On March 28th, at the Duoyuan Supercharging Station on Huanshi West Road in Nansha, Guangzhou, an electric vehicle participated in the vehicle network interaction to respond to the demand for valley filling. The charging robot automatically recognizes, charges, and settles, completing the entire process within 80 seconds. At the same time, BYD's pure electric heavy-duty trucks have joined the reverse discharge team for the first time at the Maluan Mountain suburban park charging station in Pingshan, Shenzhen. According to statistics, each heavy-duty truck can sustainably discharge up to 300 kilowatt hours of electricity, which is equivalent to the daily electricity consumption of more than 30 households and enough to fully charge 15000 mobile phones. This is the scene of China Southern Power Grid Corporation organizing the first inter provincial linkage of vehicle network interaction in China. This event covers 63 cities in five provinces and regions including Guangdong, Guangxi, Yunnan, Guizhou, and Hainan, with an interactive electricity consumption of over 500000 kilowatt hours and more than 100000 new energy vehicles participating. It is the largest vehicle network interaction in the country. It is worth mentioning that the Lianhuashan Supercharging Station in Shenzhen has tested a maximum discharge power of 1052 kilowatts, achieving true megawatt level V2G, and for the first time in the country, achieving a single day V2G reverse discharge capacity exceeding 10000 kilowatt hours. Li Minhong, Marketing Director of Southern Power Grid Corporation, introduced that the event promotes the consumption of 500000 kilowatt hours of new energy electricity, which is equivalent to the daily electricity consumption of 50000 households, and car owners receive a profit of over 400000 yuan. Through various scenarios such as reverse discharge to the power grid, intelligent and orderly charging, and inviting valley filling charging, the feasibility of vehicle network interaction in technological applications, business models, and innovative formats has been fully verified. In addition, the event successfully applied advanced technologies such as fully liquid cooled supercharging and remote control, verifying the actual effectiveness of related technologies and equipment. Large scale vehicle network interaction reduces the peak valley difference of the power grid, making electric vehicles an important resource for ensuring the safe and stable operation of the power system. In the long run, it can save investment in the power grid and power sources, and reduce social costs Hu Zechun, Deputy Director of the Institute of Power Systems at Tsinghua University, said. Exploring commercial scenarios: With the continuous increase in social electricity consumption and the proportion of new energy installed capacity, the operating pressure on the power grid has increased. As an important technology that can participate in power peak shaving and demand response, V2G's commercial application scenarios have attracted much attention. Wang Qi, Deputy General Manager of Southern Power Grid Electric Vehicle Service Co., Ltd., believes that the sustainable business model of V2G is still a key bottleneck and urgently needs to develop commercially valuable application scenarios. The Notice of the General Office of the National Development and Reform Commission on Promoting the Pilot Work of Large scale Application of Vehicle Network Interaction proposes to explore technologically advanced, clear, replicable and promotable business models with V2G projects as the main body, and strive to guide the large-scale development of vehicle network interaction through market-oriented mechanisms. Some companies and institutions have already taken action. For example, the "Automobile+Power" dual chain collaborative V2G "city level benchmark" pilot project led by Guangzhou Power Supply Bureau and Guangzhou Automobile Group has been selected as one of the first batch of large-scale application pilot projects for vehicle network interaction in China. Guangzhou Automobile Group has currently launched 6 models equipped with V2G function, with sales exceeding 30000 units. Guangzhou will study and formulate relevant supporting policies to encourage local car companies to strengthen the research and development and sales of V2G models, explore the construction of a 'power charging, storage and discharging network', and promote the participation of V2G facility users and aggregators in the construction and operation of local virtual power plants Wang Yuyin, Deputy Director of Guangzhou Industry and Information Technology Bureau, said. In the view of Wang Gang, the Operations Director of Nanning TeDian New Energy Technology Co., Ltd., participating in vehicle network interaction will become a new business growth point for the enterprise and help enhance its competitiveness. Car network interaction is not only a technological breakthrough, but also a reconstruction of production relations, which will promote the transformation and upgrading of China's new energy vehicle industry from 'capacity output' to 'system solution provider' Liu Zhihui, General Manager of GAC Energy Technology Co., Ltd., said. In response to the challenges of promotion, the prospects of car network interaction are broad, but its large-scale application still faces triple challenges. Firstly, the trading market mechanism needs to be improved. The electricity market needs innovation to adapt to the interactive characteristics of the vehicle network, allowing small-scale and widely distributed resources to effectively participate in market transactions. Professor Chen Haoyong from the School of Electric Power at South China University of Technology believes that a mechanism for the organic integration of centralized and distributed electricity should be established to aggregate the dispersed electricity of new energy vehicles into a whole and participate in traditional centralized trading in the electricity market. Electric vehicles belong to distributed resources, and end-to-end distributed transactions can be achieved through technologies such as blockchain, achieving overall coordination between low-level distributed transactions and top-level centralized transactions. In this regard, many places are currently exploring. For example, Southern Power Grid Corporation has established a "wholesale+retail" dual wheel drive model. Specifically, on the wholesale side, the power grid company achieves market-oriented guidance through inviting valley filling charging, V2G reverse discharge, intelligent orderly charging, and other methods to implement a full scenario response mechanism. On the retail side, operators attract electric vehicles to participate in vehicle network interaction through incentive measures such as charging discounts, cash subsidies, and point rewards. Secondly, the enthusiasm of the participants still needs to be improved. Frequent charging and discharging can accelerate battery aging. If the subsidy obtained from charging cannot cover the losses caused by battery aging, are car owners willing to participate in charging and discharging? In addition, how to continuously monitor battery life? "Chen Haoyong listed a series of issues that affect car owners' enthusiasm for participation. The enthusiasm of car companies, charging station operators and other entities also needs to be improved. Most new energy vehicles have not yet opened up reverse power transmission to the grid, and the number of charging stations that can achieve vehicle grid interaction is also very small. Chen Haoyong suggests that firstly, it is necessary to change the habits and concepts of users, car companies, and other participants; More importantly, we need to accelerate the breakthrough of key core technologies such as vehicle network interaction charging and discharging, battery life safety, and improve battery management technology. Thirdly, the standard system still needs to be improved. In the current technical standard system for new energy vehicles and charging infrastructure in China, the system for V2G function, information security, etc. still needs to be established and improved. In addition, the issue of incompatibility between V2G charging stations and vehicle V2G communication protocols still exists. We are exploring a multi-level market system of 'on grid electricity price+demand response+electricity market', jointly establishing a vehicle network interaction ecosystem with upstream and downstream of the industrial chain, jointly promoting the formulation of equipment standards, technical standards, and market standards, and supporting the application of technologies such as smart energy, electric power HarmonyOS, and autonomous driving Feng Qingliao, General Manager of the Marketing Department of Guangzhou Power Supply Bureau, said. (New Society)