Abstract
Wide area monitoring (WAM) offers many opportunities to improve the performance of power system protection. This paper presents some of these opportunities and the motivation for their development. This methods include monitoring the suitability of relay characteristics, supervisory control of backup protection, more adaptive and intelligent system protection and the creation of novel system integrity protection scheme. The speed of response required for primary protection means that the role WAM in enhancing protection is limited to backup and system protection. The opportunities offered by WAM for enhancing protection are attractive because of the emerging challenges faced by the modern power system protection. The increasingly variable operating conditions of power systems are making it ever more difficult to select relay characteristics that will be a suitable compromise for all loading conditions and contingencies. The maloperation of relays has contributed to the inception and evolution of 70 % of blackouts, thus the supervision of the backup protection may prove a valuable tool for preventing or limiting the scale of blackouts. The increasing interconnection and complexity of modern power systems has made them more vulnerable to wide area disturbances and this has contributed to several recent blackouts. The proper management of these wide area disturbances is beyond the scope of most of the existing protection and new, adaptive system integrity protection schemes are needed to protect power system security.
Highlights
Wide area monitoring (WAM) is one of the most significant new developments in modern power systems
This paper describes a number of the proposed concepts and how they can help to address several significant threats to the proper performance of power system protection, including: 1) The role of cascade failures and wide area disturbances in power system blackouts
WAM offers a wide variety of opportunities for enhancing the backup protection and system protection of modern power systems
Summary
Wide area monitoring (WAM) is one of the most significant new developments in modern power systems. The role of relay maloperation in wide area disturbances must be taken as a significant source of concern, as wide area disturbances have played a key role in several recent blackouts [7, 8] and the management of these wide area disturbances is beyond the scope of most of the existing protection [13] These factors have motivated the development of new protection concepts that are supported by WAM. This paper describes a number of the proposed concepts and how they can help to address several significant threats to the proper performance of power system protection, including: 1) The role of cascade failures and wide area disturbances in power system blackouts.
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