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The intermittent and uncertainty nature of variable resources rises the need to investigate the effect of the technical operation aspects of power system operation and transmission lines constrains, on estimating the penetration level of variable resources that enhances the economic and operation aspects of power system. The Incorporation of these resources into systems rises the need to evaluate...
Forecasting of wind speed and wind power generation is indispensable for the effective operation of a wind farm and the optimal management of revenue and risks. Hybrid forecasting of time series data is considered to be a potentially effective alternative compared with the conventional single forecasting modeling approaches such as autoregressive integrated moving average (ARIMA) and artificial neural...
The stochastic nature of wind power brings about large ramp events and poor prediction accuracy, which challenges the secure operation of power systems. Several stochastic unit commitment and economic dispatch methods are proposed to handle the prediction error of wind power, but few of them have attended to the ramp events. Therefore, this paper elaborately discusses the necessities to account for...
In the future, state-of-the-art wind generators (WGs) are expected to produce one of the largest amounts of renewable energy worldwide. Nowadays, wind DFIGs with integrated storage are regarded as the state-of-the-art WGs. In this paper, we propose a comprehensive methodology that aims to solve the problem of distributed coordination and control of state-of-the-art WGs. The goal is for a WF to generate...
As a type of clean and renewable energy source, wind power is being widely used all around the world. However, owing to the uncertainty and instability of the wind power, it is important to build an accurate prediction model for wind power for the grid-connected security operation. The performance of hybrid method is always better than that of single ones in the wind power prediction. Actual wind...
Battery storage systems (BSSs) have been used to participate in day-ahead scheduling of active distribution network (ADN). BSSs play significant roles in improving the efficiency of distributed generations (DG) utilization and economy of ADN operation. In this paper, a new optimal charging/discharging scheme of BSSs is proposed in ADN with DGs. Both time-of-use (TOU) price and the price difference...
The integration of wind power into power systems has been gaining momentum in the global energy industry due to its environmental benefits and abundance of supply. However, the natural intermittent and non-dispatchable features of wind negatively impact the system's frequency regulation capability. Wind power not only injects additional fluctuations to the already variable nature of frequency deviation,...
Among renewable power sources, wind energy is the most promising technology; however, the inter-temporal uncertainty of this source makes impossible its massive integration. Forecasting of wind generation is a key factor for the economical operation of the power system. Thus, the error related to this process is typically modeled by means of a determined probability distribution to be later incorporated...
Wind energy is a clean and renewable energy source which is rapidly growing globally. As the penetration level of wind power grows, the system operators need to consider wind power producers as strategic producers whose bidding behaviors will have an impact on the locational marginal prices. This paper proposes a bilevel stochastic optimization model to obtain the optimal bidding strategy for a strategic...
Spinning reserve (SR) allocation problem is of vital importance in maintaining power systems security and reliability. Considering forecast uncertainties, unit commitment problem and contingencies on the failure of transmission lines, a general probabilistic model for expected total cost is established and its corresponding solution for optimal SR allocation strategy is proposed. The objective function...
An increased use of variable generation technologies (VGTs) such as wind power and photovoltaic (PV) generation can have important effects in system frequency performance during both, normal operation as well as major power imbalances. This has led to new challenges for Transmission System Operators (TSOs), especially regarding the amount and kind of operating reserves to impose in the Unit Commitment...
In this paper we examine potential improvements in how load and generation forecast uncertainty is captured when setting reserve levels in power systems with significant renewable generation penetration and discuss the merit of proposed new methods in this area. One important difference between methods is whether reserves are defined based on the marginal distribution of forecast errors, as calculated...
With more wind power integrated into grid, wind-gas coordinating power generation attracts extensive attention, and it's no longer appropriate to validate automatic generation control (AGC) algorithm for large scale wind-gas generation with a single tool. First, this paper proposes an AGC simulation architecture that combines Real Time Digital Simulator (RTDS) and other off-the-shelf devices to implement...
This paper presents a planning framework to find the minimum storage sizes (power and energy) at multiple locations in distribution networks to reduce curtailment from renewable distributed generation (DG), specifically wind farms, while managing congestion and voltages. A two-stage iterative process is adopted in this framework. The first stage uses a multi-period AC optimal power flow (OPF) across...
The supply of electrical energy is being increasingly sourced from renewable generation. The variability and uncertainty of renewable generation, compared to a dispatchable plant, is a significant dissimilarity of concern to the traditionally reliable and robust power system. This change is driving the power system towards a more flexible entity that carries greater amounts of reserve. For congestion...
Wind energy penetration level may be adversely impacted by frequency deviations as a result of wind power fluctuations. Energy Storage System (ESS) can be a viable candidate for mitigating wind power fluctuations. However, economic considerations for ESS may cause significant limits in implementation. Therefore, effectiveness and optimal size of ESS are important to study. This paper proposes a method...
Assessing security margin of operation is vital in situation awareness for power systems with centralized wind farm integration. Total transfer capability (TTC) can be used as an indicator referring to the maximal loadability of transmission corridors. However, the calculation of TTC considering wind generation is a computation-intensive procedure. In order to assess TTC, an estimation approach based...
The aim of this paper is to provide a formulation of the stochastic unit commitment (UC), modeling in detail the operational phases of the thermal units as well as their start-up and shut-down trajectories. A MILP two-stage stochastic model is proposed for the solution of the proposed UC problem, where the uncertainty considered is related to the wind power penetration and the demand consumption....
Integration of wind power generation is increasing rapidly worldwide, hence bringing more challenges to the safe operation of the power system. In this paper, the basic construction method of dynamic security region (DSR) boundary is introduced. A model is established based on DSR, whose object is the minimization of controlling cost in dispatching operations. The coordinated control strategy based...
Efficient utilization of large-scale wind power is crucial to make the power industry economical and environment friendly. One way to consume wind power is through constructing isolated power systems with wind power supplying high energy consumption industries directly. However, one key issue, which limits the isolated power system for industry-wide application is to maintain the system frequency...
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