Energy Storage Smart Substation

As a major part of the smart grid, the smart substation has entered a comprehensive construction stage. The change mode of power grid development, the innovation and development of management model, the scientific and technological progress has put forward new requirements on the development of smart substations.

The metering system of the new generation smart substation is a digital energy metering system, which consists of an electronic voltage transformer, an electronic current transformer, a merging unit and a digital energy meter or a multi-function device integrated with a digital energy meter function and an electric energy collecting terminal.

The new generation smart substation research focuses on overcoming the transformer equipment self-diagnosis, an intelligent device, station and wide-area protection and control systems, and other key technologies, significantly reducing the area and enhancing the safety, reliability, and economy.

The new generation smart substation will focus on new equipment, new materials, new technologies, primary electricity, and secondary light, which is characterized by power electronic technology and can rapidly achieve flexible control of energy and contains AC and DC mixed supply function.

Constitution and cooperation of hierarchical protection The new generation smart substation protection system adopts the hierarchical construction idea, synthesizes the panoramic data information of power grid, and constructs the hierarchical protection control systems consisting of the time dimension, space dimension, and functional dimension.

Based on the intelligent high-voltage equipment, the new generation of smart substation network is simplified from the current three-tier, two-network structure to a two-tier, one-network structure; according to the realization of different functions, the devices are classified into local and station control layers.