ATC with ZIP load model – A comprehensive evaluation with third generation FACTS in restructured electricity markets

• OPF approach for ATC determination for multi-transactions and with FACTS is proposed.
• Impact of ZIP load on ATC determination is evaluated.
• Comparison of ATC with ZIP load and constant P,Q load is provided.
• Comparison of ATC is also provided based on PTDFs with FACTS devices.
• ATC enhances with third generation FACTS devices.

In this paper, an optimal power flow based approach has been applied for multi-transactions in deregulated environment for ATC determination with third generation FACTS devices. The main contribution of the paper is (i) OPF based approach for evaluation of ATC with multi-transactions, (ii) ATC enhancement with third generation FACTS devices viz. Static Compensator (STATCOM), Static Synchronous Series Compensator (SSSC), and Unified Power Flow Controller (UPFC) for intact and line contingency cases (iii) Impact of ZIP load on ATC determination and comparison of ATC obtained with ZIP load model and constant P,Q load model, (iv) Comparison of ATC obtained with DC/AC-PTDFs based method along with FACTS devices for comparison. The results have been determined for intact and line contingency cases taking simultaneous as well as single transaction cases for IEEE 24 bus RTS.

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