Comparative assessment of power loss among four typical wind turbines in power distribution system

Power loss in current power distribution systems is of critical importance and greatly influences sizing of electric devices. In this paper, four types of wind turbines (WTs) are evaluated and simulated on IEEE 33-bus test system using ETAP software: Type-1: fixed-speed conventional induction generator; Type-2: variable slip induction generator with variable rotor resistance; Type-3: variable speed doubly-fed asynchronous generator with rotor-side converter; and Type-4: variable speed asynchronous generator with full converter interface. ETAP software is one of the most powerful and practical simulation packages used for power system transient studies. Four scenarios are considered in this study. In the first scenario, no WTs are installed in the network and the system operates in conventional fashion. In the second scenario, WT is integrated in upstream network; while in the third scenario, WTs are installed in distributed fashion in two positions through the network. In this state, all four types of turbines are examined in terms of power loss in different and sensitive locations of the network. In addition, power losses related to each type in each part of the system are compared with each other and when no WTs are installed. Furthermore, voltage drop of each bus to which the WT may be connected is measured in order to get the appropriate WT in each scenario in terms of power loss.

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