Coordination of Generation and Reactive Power Expansion Planning Considering APFC Units

This paper presents a framework to simultaneously coordinate generation and reactive expansion planning. With presence of amalgam power flow controller (APFC) as useful FACTS devices, generation planning has been done in different scenarios and cases. APFC is a combination of electromagnetic and voltage source converter that it has the specifications of both devices. The objective functions for generation expansion planning (GEP) includes investment and operation cost for generation units. Operation cost has been divided into three parts: a) maintenance cost, b) fuel cost and c) emission cost. Investment cost of reactive power and voltage deviation index are two objective functions considered in RPP. The proposed coordinated GEP and RPP is formulated as a multi-objective optimization problem that it is solved by adaptive NSGT-III. The proposed framework is a multi-objective optimization problem and the output of solved problem is Pareto-optimal diagram. Pareto-optimal diagram is a set of desirable points that it can be employed for expansion planning. To select the best solution among Pareto-points, TOPSIS method is used. The proposed framework is tested on 24-bus IEEE test system. The simulation results have been compared for two scenarios and four cases.