Analysis of technology and economy of new generation smart substation

With the development of power grid, great progress have been achieved on the integrated design, smart device manufacturing, modular distribution construction of the new generation smart substation, which are revolutionarily innovative. This paper introduces design characteristics, construction goal and functions of the new generation smart substation, key equipments and core technologies such as disconnecting circuit breaker, station area protection and control system, and analyzes the technology advantages, such as reducing footprint, shortening construction period, reducing maintenance cost, improving the reliability. Based on analytic hierarchy process and fuzzy comprehensive evaluation, a method to evaluate economic performance of substation in a whole life cycle is proposed. First, the structural model is established for the economic factor in the whole life cycle of substation. Then a comprehensive evaluation system is constructed, and the evaluation and calculation method of the factors in the system are deduced. Evaluation on a 110kV new generation smart substation shows that it could effectively reduce the substation life-cycle cost.