ABB - Substation Automation and Protection White Papers

Applying Modern Communication Technology to Loss-of-Mains Protection The protection of distribution networks is facing new challenges from an increasing amount of distributed generation. Even though current technology provides satisfactory solutions to manage this new situation, loss-of-mains protection is still considered problematic. This paper focuses on the use of a line differential protection relay, which inherently contains a suitable communication channel and provides absolutely selective protection for the feeder.
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Impacts of Quality Improvement Incentives on Automation Investments in the Finnish New Regulation Model During the second regulatory period of 2008-2011 incentives are included into the Finnish regulation model that allow higher profits for the network owners for properly allocated network investments leading to lower operation and interruption costs. In this paper the economical benefit and payback time of different automation schemes in two typical Finnish rural medium voltage (MV) distribution feeders are studied.
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Increasing Cost-Efficiency of Substation Automation Systems by Centralised Protection Functions New legislative and customer-oriented requirements pose challenges to substation automation. Technology developed by ABB in cooperation with Tampere University of Technology and Fortum Finland addresses these challenges with centralised protection functions. The new concept facilitates easy upgradeability of substations while still keeping costs low and reliability high. New value added functionality will also increase cost-efficiency.
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Performance of Novel Neutral Admittance Criterion in MV-Feeder Earth-Fault Protection This paper describes the fundamentals of the neutral admittance based earth-fault protection and suggests improvements to the traditional measuring principle and operation characteristics. The performance is also evaluated and compared with traditional earth-fault protection schemes. The results show that the neutral admittance criterion has potential to become a standard and widely used earth-fault protection function in high impedance earthed networks.
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Utilising the Possibilities of IEC 61850 and GOOSE This document describes the utilisation of some new features offered by IEC 61850, Communication Networks and Systems in Substations. In particular, the paper looks at how horizontal communication, commonly known as GOOSE communication, between protection and control devices can be used to improve the reliability and performance of the system. The paper presents also a practical GOOSE application, i.e. blocking based busbar protection.
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