Abstract
The new generation of smart substation is a summary and improvement of the earlier intelligent substations within the past 5 years. As a part of the substation operation function, the electric energy metering system must adapt to the requirements of the new generation smart substation which is more intelligent, full digitalization, networked and integrated. With the features of digitized, easy information sharing, and hardware shared, the digital measurement system is the inevitable choice for the new generation smart substation. This paper is the first literature to introduce the concept and structure of the digital metering system. The composition and technical characteristics of the new generation Smart Substation measurement system are introduced in detail.
Highlights
As one of the important parts in developing smart grid, the smart substation uses advanced, reliable, integrated, low- carbon and environmentally friendly equipments and design
Since 2009, the construction of smart substation has started in china [1], the early metering system of smart substation used traditional transformer, the digital level is not so high, and the integration with other secondary systems is not so deep, which limits the information-sharing between different services of the smart substation, and affects the level of intelligence
The digital metering system should meet the overall requirements of the new generation smart substation with more comprehensive intelligent, digitization and integration
Summary
As one of the important parts in developing smart grid, the smart substation uses advanced, reliable, integrated, low- carbon and environmentally friendly equipments and design. With qualities of digitization of whole station information, networking of communication platform, standardization of information-sharing, integration of system function, compact design of structure, intelligent of highvoltage equipment and visualization of running status, smart substation can support power grid to realize real-time online analysis and control decision, and improve the operation reliability and economy. The digitized, networked, standardized and integrated features of smart substation affect the design and configuration of secondary systems such as protection, measurement and control systems, and affect the metering systems of the substation. Compared with the earlier smart substations, the new generation smart substation puts forward higher requirements to intelligent, digitized and integrated level. The digital metering system should meet the overall requirements of the new generation smart substation with more comprehensive intelligent, digitization and integration. With the feature of digitization, the digital metering system aims at metering and collecting electric energy in someone measuring point, it consists of digital electric energy metering device for power metering and acquisition terminal for power collection
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