Design of an intelligent system for comprehensive validation of protection settings

Abstract

The reliable operation of protection systems depends on the correct settings of protective devices. The complexity of power networks and the large number of protection setting parameters make it extremely challenging to comprehensively validate the settings. This paper presents the design of a hybrid Rule-Based (RB) and Model-Based (MB) intelligent system termed Power system Protection Smart Tool (PPST), which is proposed as a solution for addressing the challenges associated with protection settings validation and performance checking. The RB element evaluates the settings using rules extracted from experts' knowledge and utility setting policies, while the MB element automatically interfaces with DIgSILENT PowerFactory to populate power network and protection system models to simulate and check the actual performance of the protection system under a variety of operational contexts. A case study is presented to demonstrate the operation of PPST, which shows that it is capable of effectively conducting the protection settings validation and performance checking task.

Study of mutual influence of measuring part elements of transformer differential protection and its impact on the primary signal processing

“…The main emphasis in NRP simulation should be made on the MP detailed modeling. This conclusion is supported by other studies, for example [13][14][15][16]. The question arises: what and how should be taken into account in the MP model?…”

“…In the article [14], author writes that ATs does not affect at the accuracy of the RP simulation results as a whole. In some other projects, for example in [16], analogous simplifications are used. As for anti-aliasing LPFs, there is an uncertainty in their choice, since there is no detailed information in the NRP manufacturer's guidelines.…”

Settings determination for numerical transformer differential protection via its detailed mathematical model

“…The possibility and prospects of mathematical models usage for RP setting up are mentioned in many papers [10][11][12][13][14][15][16][17][18][19]. The object of research in all projects is numerical RPs (NRPs).…”

Distance Protection Relay Performance Enhancement Through Integrated Control System

“…Distance relays are one of the most important protection elements in a transmission line [3,4]. The reliable operation of protection systems depends on the correct design and protection settings within protective devices [5]. Series capacitor banks are frequently inserted in long power lines to reduce their total impedance, thereby permit the transmission of more power, reduce voltage drop, increase system stability limits [1], and provide better load division on parallel transmission lines.…”