A collaborative framework for multi-area dynamic security assessment of large scale systems

Abstract

Abstract-In this paper we propose a collaborative framework to carry out multi-area dynamic security assessment over an interconnection operated by a team of TSOs responsible of different areas. In this framework each TSO does his part of the work and, thanks to information exchange and coordination rules, potential security problems can be detected by all the involved TSOs. We find that distributed multi-area security assessment is achievable and useful if, on the one hand, each TSO can provide an appropriate dynamic equivalent model of his area and if, on the other hand, he is able to publish stability bounds on his inflows under which the dynamic performance of his system would remain acceptable. We then discuss the notions of dynamic equivalent model and external stability domain characterization of an area and identify techniques for deriving such equivalents and stability bounds within the proposed framework.

Security assessment by multiple transmission system operators exchanging sensitivity and tie-line power flow information

“…The objectives of the work presented in this paper is to illustrate one aspect of the general multi-area security assessment and control framework introduced in [4]. In the authors' opinion this framework fits well the regional security assessment and control problem discussed in the UCTE documents.…”

“…The general multi-area security assessment and control framework introduced in [4] is outlined in Fig. 1.…”

“…We shortly present the main features of the framework (for more details, the reader is invited to refer to [4]). Let D i (c) denotes the real-time data about the system of T SO i (SCADA, state-estimator output, contingency lists, etc.)…”

“…This paper does not consider the idea proposed in [4] to reduce the information flow by exploiting safety bounds provided by each TSO so as to filter the amount of postcontingency power flow sets that need to be exchanged. Instead, it is assumed that each TSO determines which variation of tie-line power lows have a significant impact on his system and hence require a more detailed analysis.…”

“…This paper reports on static security assessment within the collaborative framework proposed in [4]. In this context, each TSO is committed to:…”