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Although the installed wind generation capacity has grown remarkably over the past decades, percentage of wind energy in electricity supply portfolio is still relatively low. Due to the technical limitations of power system operations, considerable wind generation cannot integrate into the grid but gets curtailed. Among various factors, transmission congestion accounts for a significant portion of...
The presence of high levels of Renewable Energy Resources (RES) and especially wind power production poses technical and economic challenges to System Operators, which under this fact have to procure more Ancillary Services (AS) through various balancing mechanisms, in order to maintain the generation-consumption balance and to guarantee the security of the grid. Traditionally, these critical services...
Power systems around the world have set ambitious targets for renewable energy integration. Several jurisdictions incentivize renewables such as the Feed-in Tariff in Ontario, Canada. These incentives shall eventually run out and renewables would have to competitively sell energy into electricity markets, overcoming uncertainty and variability in their output. This paper proposes a Wind Generators...
Aluminum production relies on the smelting process which consumes huge electrical energy. One possible solution to reduce the fossil fuel consumption by aluminum production is the integration of wind power. Based on this background, this paper studies an isolated power system for aluminum smelting production with a high penetration of wind power. A dynamic model of the aluminum smelter load (ASL)...
The use of wind energy sources for supplying electric vehicle (EV) loads is a challenge for electricity market operators due to their inherent uncertainty in the current market architecture. Coordinated energy exchange between EV load aggregators and wind generating companies (WGenCOs) can potentially increase the competitiveness of WGenCOs and EV-load customers in the energy market. This paper proposes...
A major challenge in power system operation is the integration of renewable energy in-feed in large scale. Currently, the responsibility to cope with uncertainty in power injection is transferred to a central authority, i.e. the system operator, while renewable energy in-feed is supported via a tariff system. In this paper we propose market participation of wind farms in combination with a third-party...
Dependency on thermal generation and continued wind power growth in Europe due to renewable energy and greenhouse gas emissions targets has resulted in an interesting set of challenges for power systems. The variability of wind power impacts dispatch and balancing by grid operators, power plant operations by generating companies and market wholesale costs. This paper quantifies the effects of high...
Wind power forecasting is one of the most important aspects for power system with integration of wind power. In this work, Component GARCH-M (CGARCH-M) model is presented for short-term wind power forecasting (STWPF). Moreover, asymmetric and distributional considerations are taken into account to generalize the CGARCH-M type models. The CGARCH-M type models can decompose the volatility structure...
Participation of wind energy along with conventional fuel sources in power generation is progressively rising in many countries. Due to continuous development of large-scale wind farms, some synchronous generators are being economically displaced from generation schedule. Modern wind turbine generators do not generally provide frequency control support after a disturbance, while during a fault they...
In this paper, the impact of natural gas system on the short-term scheduling with high penetration of renewable energy is illustrated and analyzed. The natural gas infrastructure constraints are integrated into the security-constrained unit commitment model, which minimizes the expected operation cost while considering the variable wind power generation. Benders decomposition is applied to solve the...
Due to its intermittent nature, high wind penetration requires more flexibility in the electric power grid to provide the balance. Large scale energy storage is one such option that allows the intermittency to be absorbed in real time. Two types of large scale energy storage technologies including Sodium Sulpher (NaS) battery and compressed air energy storage (CAES) are studied in this paper. In this...
This paper presents ways of estimating CO2 reductions of wind power using different methodologies. Estimates based on historical data have more pitfalls in methodology than estimates based on dispatch simulations. Taking into account exchange of electricity with neighboring regions is challenging for all methods. Results for CO2 emission reductions are shown from several countries. Wind power will...
This paper focuses on a wind power forecast monitoring system for the need of a Transmission System Operator, using a case of Finland as an example. Wind power monitoring tool development was done closely with the operators from the TSO's control room to make sure all information needed for system operation was captured. The system operators highlighted the need for simple graphical views, with warnings...
Risk-limiting dispatch (RLD) is a promising approach to deal with the increasing uncertainty in both supply side and demand side of power systems. However, the conventional RLD has two drawbacks: i) it is difficult to set the value of acceptable risk level; ii) it has limitations to address the scenario with more realistic but non-Gaussian and heavy-tailed renewable output forecasting errors. To resolve...
The constant increment in the penetration of renewable energy sources requires the improvement of the flexibility of the power system. Due to its high generation cost, it is expected that insular power systems experience an important increment in the power generation from renewable energy sources and, under this perspective, an energy storage system (ESS) could be the key factor to meet this goal...
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