Konrad Purchala

Zonal network model of European interconnected electricity network

In this paper the authors discuss the feasibility of a zonal UCTE network model for congestion management. Zonal network model aggregates all nodes within a control zone and substitutes it by one equivalent node; individual cross-border lines are substituted by equivalent one link per border. This model allows derivation of power transfer distribution factors PTDF matrix that could model the interaction between zonal power injections and cross-border flows, and therefore allow for the implementation of flow-based congestion management models

Market coupling simulator

It is crucial that electrical engineering students are exposed to the functioning of the electricity market. This paper discusses a lab developed for that purpose. In the lab, students are assigned a generation park with plants in different European countries. They compete to supply energy on a Web-based trading platform that coordinates trade in different European countries, given the offers to supply and demand energy and the available cross-border transmission capacities. A market-coupling algorithm is implemented in MATLAB based, on the principles of locational marginal pricing. The algorithm can be run through the WWW. The market coupling simulator is useful to test market-coupling algorithms and to confront students with some of the decisions generating companies take in liberalized electricity markets.

Implementation aspects of coordinated auctioning for congestion management

Auctioning for transmission capacity is one of the better-known means of congestion management. Unfortunately due to the fact that in meshed networks it might be infeasible its application is limited. Therefore its concept has been extended to coordinated auctioning, where instead of single interconnection transmission rights, being all transfer capacity required for a given transaction, are being auctioned. Such auction is a relatively new idea and there are still lots of issues that need to be addressed. How should the market players be charged for capacity - marginal price or their actual bid price? Should the contracts be firm? What about netting of opposite flows? How many auction rounds should there be? What kind of products could be traded? In this paper implementation aspects of coordinated auctioning are discussed and authors point of view is presented.