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Since the interactivity, integrality and instantaneity of the data communication in smart substation have been improved to a higher degree, it can contribute to the construction and realization of substation area backup protection (SABP). In this paper, the structure and characteristics of smart substation were introduced firstly, and the application concept about SABP was presented in detail. According to the comprehensive treatment and judgment for the digital information of whole substation, such as voltage/current samplings of multiple bays, status of circuit breakers, etc., this type protection system can implement the backup protection function for each electrical element inside smart substation. In addition, with regard to the protection algorithm and application structure of SABP, as well as the coordination relationship between SABP and main protection, a few correlation analysis and discussions were carried out. From the analysis results, it can be considered that, the construction of SABP can effectively promote a substation area range of data information sharing and help to enhance the whole protection system's operation performance.

The increase in the penetration rate of distributed renewable energy sources has brought unprecedented challenges to the economic and stable operation of the active distribution network (ADN). To improve the operating efficiency and total benefits of the ADN, it is necessary to establish an optimization model considering the stakeholders’ market behavior and the game relationship among them under the market environment. In this paper, a multi-stakeholder potential game model in the ADN considering the bounded rationality of small users is proposed. The game relationships among five stakeholders, including the distributed photovoltaic generation aggregators, the distributed wind power aggregators, the energy storage operators, the large users and the load aggregators, are modeled on an hourly time scale. Existing research has proved that the game equilibrium of the potential game model must exist. Based on the information transfer and the strategy update mode on the social network, a demand response evolutionary game model for small users is established. Moreover, a distributed algorithm is designed to obtain the pure strategy equilibrium. Finally, a case with five stakeholders and 160 small users is used to verify the rationality and feasibility of the proposed model.

The application transparency of secondary equipment in Smart Substation is low, the logical linkage is poor, and the intercommunication ability of equipment from different manufacturers is limited, which seriously restricts the promotion and application of advanced application functions. In view of the above problems, this paper carries out the research on advanced application configuration design technology of Smart substation, realizes automatic generation of advanced application logic through configuration configuration technology, realizes real-time display of logic status through configuration monitoring technology, and develops a measurement and control device supporting configuration design. The research results of this project are applied to a 110kV Smart substation in Hubei Province. The application results show that the technology described in this paper can effectively improve the application quality and efficiency of advanced application functions.