Abstract
Wind power generation provides an attractive method for tackling global environmental issues. However, the power grid cannot accommodate large amount of wind farms (WFs) because the fluctuation of WF output degrades the power quality (frequency and voltage) in the power grid. Technical requirements that are related to WF power fluctuation are issued in many countries in order to introduce the WF without degrading power quality. Therefore, it is essential to smooth the WF output in order to satisfy the technical requirements. This paper proposes an operation methodology for a system that is composed of energy storage systems (ESSs) and WF by kinetic energy (KE) control. Moreover, an optimal KE control is presented. The economical aspect and the advantage of the proposed system are verified through scenario simulations.
Highlights
Wind power generation is spotlighted because of global warming and the depletion of fossil fuels, etc. [1].If a large number of wind farms (WFs) are introduced to the power systems, it leads to a solution to the above issues, since thermal power generation in the power system is reduced
This paper proposes a system that is composed of energy storage systems (ESSs) and WF operated by the kinetic energy (KE) control
We define the installation cost of WF, ESS, an opportunity loss of WF, ESS, and cost of power converter system (PCS) of the battery in order to calculate the total cost of the system composed of the ESS and the WF operated by KE control, as follows: Installation cost of WF: I
Summary
Wind power generation is spotlighted because of global warming and the depletion of fossil fuels, etc. [1]. A simple controller composed of a gain and a second-order high-pass filter was proposed in [14] This controller can reduce the rated power of the. Further cost reduction is desired in order to smooth the output of large-scale WFs. The pitch angle control can smooth wind generator (WG) output without an ESS [15,16,17]. The increase of mechanical stress and fatigue of the WG is inevitable It is impractical for the WG output to be smoothed by the pitch angle control. The operating point of the WG is shifted from the maximum power point It implies that there is a trade-off between the WG output smoothing and the generating efficiency.
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