Optimization of Wind Power Dispatch to Minimize Energy Storage System Capacity

Abstract

-By combining a wind turbine with an energy storage system (ESS), we are able to attenuate the intermittent wind power characteristic making the power derived from a wind farm dispatchable. This paper evaluates the influence of the phase delay of the low-pass filter in the conventional smoothing power control on the ESS capacity; longer phase delays require a larger ESS capacity. In order to eliminate the effect of the phase delay, we optimize the power dispatch using a zero-phase low-pass filter that results in a non-delayed response in the power dispatch. The proposed power dispatching method significantly minimizes the ESS capacity. In addition, the zero-phase lowpass filter, which is a symmetrical forward-reverse finite impulse response type, is designed simply with a small number of coefficients. Therefore, the proposed dispatching method is not only optimal, but can also be feasibly applied to real wind farms. The efficacy of the proposed dispatching method is verified by integrating a 3 MW wind turbine into the grid using wind data measured on Jeju Island.

Feasibility Analysis of Behind-the-Meter Energy Storage System According to Public Policy on an Electricity Charge Discount Program

“…Mitigating the fluctuation of intermittent renewable energy generation through ESSs has been studied in Zhao et al, Beaudin et al, Barton and Infield and Suberu et al [20][21][22][23]. The determination of the size and location of ESS installation for integrating wind power generation has also been studied in Nguyen and Lee and Dvorkin et al [24,25]. Nguyen and Lee [24] examined a method of dispatching wind power generation while minimizing the size of ESS connected with wind power and Dvorkin et al [25] conducted a study for the determination of the size and location of ESS installation so as to maximize profit through energy arbitrage through surplus power from renewable generation variation.…”

Effective power dispatch capability decision method for a wind‐battery hybrid power system

“…Integrating batteries with WFs results in a wind‐battery hybrid power system (WBHPS), in which the system cost and the power control must be taken into account. Related to the system cost, finding methods to minimise the battery capacity has attracted increased attention in recently published literatures [9–11]. Nguyen and Lee [9] suggested the use of a zero‐phase low‐pass filter to remove the phase‐delay between the power dispatch and wind power, which results in the minimum required battery capacity.…”

Optimal Power Control Strategy for Wind Farm with Energy Storage System

“…The proposed method is compared with the conventional LPF method [12] and the conventional zero-phase low-pass filter (ZLF) method [13] in order to verify its effectiveness, while the performances of the hybrid system using each control method are shown in Fig. 11.…”

“…However, the phase delay in the pass-band of the filter requires a high capacity ESS. To address this problem, a power dispatching method based on the zerophase LPF was firstly introduced in [13]. However, in this method, the time constant of the filter is not optimized during the system operation, so that the required ESS capacity is still high.…”