Study on the Substation Area Backup Protection in Smart Substation

Abstract

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.

Smart Local Backup Protection for Smart Substation

“…With the integration of smart substations many concept of protection has been presented in literature such as wide area protection [3], [4] which protects a certain area of the grid nevertheless these concepts need a robust communication infrastructure which is not available in most cases. Furthermore, some backup Protections used to support the protection of substation based on direction comparison principle and current differential protection principle were presented [5][6][7][8] however, those algorithms are complexes to be implemented in SAS (Substation Automation System) more than that no experimental tests or prototypes have been presented.…”

A new coordinated backup protection scheme for distribution network containing distributed generation

“…Extensive studies have been carried out by researchers on how to improve the protection performance and functionalities by better utilization of digital and communication technologies. From the division of protection information domain, wide area protection is based on wide area measurement system (WAMS) to implement large-scale system protection and control [4][5][6][7][8][9]. This kind of system is developed from early special protection systems (SPS) [10] and broadens traditional relay protection function from point to surface.…”

Development and research on integrated protection system based on redundant information analysis

“…Wide area protection is based on a wide area measurement system (WAMS) that implements a regional protection and control system [2][3][4][5][6][7]. This was developed from special integrity protection systems (SIPS) [8] and broadened the role of traditional relay protection from a point to a surface, so that the high standards of dependability and security inherent in modern protection systems can be maintained [9].…”