The impact of photovoltaic power plant penetration level on security constrained unit commitment and an approach for reducing curtailment of PV energy

Kahraman, Özgür
As a main rule of electricity grid, the balance of generation and demand must be maintained. The system operators execute “Unit Commitment (UC)” process in day-ahead market in order to fulfill this aim. The Security Constrained Unit Commitment (SCUC) algorithm creates optimal hourly schedules for generators with minimum total electricity generation cost considering the forecasted hourly demands for the next day and the generation offers while satisfying the constraints of generators and transmission system. In this thesis, SCUC considering PV power plants is studied. The increasing number of PV power plants and governmental regulations targeting 20% and above Renewable Energy Sources (RES) share of the total energy urge the analysis of the impact of large capacities of RES to electricity market and generation cost. Taking this as the main motivation, the SCUC algorithm is modified and applied on the IEEE 118 Bus Test System. The capacity of PV power plants and connection buses are determined using references from the literature, and the test system is modified by placing these plants to the relevant buses. Average and intermittent daily PV generation values are generated using the past solar irradiation measurements. The capacity and number of PV power plants are increased systematically. The SCUC algorithm is modified by adding PV characteristics and Curtailment Penalty Price (CPP), and the CPP impact on reducing curtailment of available PV energy is analyzed in a systematical way. The effect of large capacities of PV generation to the total electricity generation cost is evaluated by inspecting the committed PV generation and resulting curtailment of available PV energy through the case studies. Moreover, a method for reducing curtailment that increases the utilization of PV generation is introduced and the applicability is verified.


Optimal phasor measurement unit (PMU) placement for the power systems with existing SCADA measurements
Ertürk, Bulut; Göl, Murat; Department of Electrical and Electronics Engineering (2017)
It is extremely important to maintain efficiency, sustainability and reliability of the generation, transmission and distribution of the electrical energy; hence it is mandatory to monitor the system in real time. State estimation has a key role in real time monitoring of a power system. The considered power system has to be observable in order to perform state estimation. Traditionally, power system state estimators employ SCADA measurements. However, as the number of Phasor Measurement Units (PMUs) increa...
Short term electricity price forecasting in Turkish electricity market
Özgüner, Erdem; Güven, Ali Nezih; Tör, O. Bülent; Department of Electrical and Electronics Engineering (2012)
With the aim for higher economical efficiency, considerable and radical changes have occurred in the worldwide electricity sector since the beginning of 1980s. By that time, the electricity sector has been controlled by the state-owned vertically integrated monopolies which manage and control all generation, transmission, distribution and retail activities and the consumers buy electricity with a price set by these monopolies in that system. After the liberalization and restructuring of the electricity powe...
On the parametric and nonparametric prediction methods for electricity load forecasting
Erişen, Esra; İyigün, Cem; Department of Industrial Engineering (2013)
Accurate electricity load forecasting is of great importance in deregulated electricity markets. Market participants can reap significant financial benefits by improving their electricity load forecasts. Electricity load exhibits a complex time series structure with nonlinear relationships between the variables. Hence, new models with higher capabilities to capture such nonlinear relationships need to be developed and tested. In this thesis, we present a parametric and a nonparametric method for short-term ...
Design and realization of a new concentrating photovoltaic solar energy module based on lossless horizontally staggered light guide
Selimoğlu, Özgür; Turan, Raşit; Department of Physics (2013)
Concentrating Photovoltaic systems are good candidates for low cost and clean electricity generation from solar energy. CPV means replacing much of the expensive semiconductor photovoltaic cells with the cheaper optics. Although the idea is simple, CPV systems have several problems inherent to their system design, such as module thickness, expensive PV cells and overheating. Light guide systems are good alternatives to classical CPV systems that can clear off most of the problems of those systems. In this t...
Two new indices for the assessment of regional transmission connection capacities
Güverçinci, Ali Haydar; Göl, Murat; Department of Electrical and Electronics Engineering (2017)
Traditionally electrical power industry has been regulated and monopolized. However, since 1980s it has undergone a period of restructuring throughout the world. This privatization procedure has made the planning and operation of the generation, transmission and distribution parts of power system relatively more independent and disconnected. The transmission system planners lost their direct control over plant investments. As a result, planning of the transmission system became more complex than it ever was...
Citation Formats
Ö. Kahraman, “The impact of photovoltaic power plant penetration level on security constrained unit commitment and an approach for reducing curtailment of PV energy,” M.S. - Master of Science, Middle East Technical University, 2016.