Paper presents the results of characterization of measurement of sky luminance. Results will be used for preparation of an annualsky model. The model will enable accurate calculation of energy savings for lighting by using daylight
COBISS.SI-ID: 9897300
Market simulators based on Agent-based Modeling techniques are frequently used for electricity market analyses. However, the majority of such analyses focus on the electricity markets bidding strategies on generation-side rather than on the demand-side. Meanwhile, the behavior of the demand-side in the system reserve provision has been less investigated. This paper presents a novel system reserve provision agent which is incorporated into a stochastic market optimization problem. The agent for the system reserve provision uses the SA-Q-learning algorithm to learn how much system reserve to offer at different times, while seeking to increase the ratio between their economic costs and benefits. The agent and its learning process are described in detail and are tested on the IEEE Reliability test system. It has been shown that incorporating the demand-side market strategies using the proposed agent improves the performance and the economic outcome for the consumers.
COBISS.SI-ID: 11226196
On the basis of historical WAMS measurements data of dynamic phenomena in power system the dynamic model of slovenian power system (including electrical "vicinity") has been validated. The procedures, methods and problems related to such an approach are described. According to authors information the paper describes such an approach in European system for the first time.
COBISS.SI-ID: 10792788
This paper deals with reactive power compensation and harmonics elimination in medium-voltage industrial networks using a hybrid active power filter. It proposes a hybrid filter as a combination of a three-phase, two-level, voltage-source converter connected in parallel with the inductor of a shunt, single-tuned, passive filter. This topological structure greatly decreases the voltage and current stress over the elements of the active filter. We propose using a proportional-resonant current controller for driving the active part of the filter. Theoretical analyses and simulation results obtained from an actual industrial network model in PSCAD verify the viability and effectiveness of the proposed hybrid filter. In addition, the simulation results are validated by a comparison with the results obtained from a real-time digital simulator.
COBISS.SI-ID: 10780756
The paper assesses the impact of electric-drive vehicles (EDVs) on power system reliability. For this purpose, it introduces direct optimization of reliability indices LOLE (Loss of Load Expectation) and EENS (Expected Energy Not Served). The analysis is performed by the proposed optimization model applied in different strategies of charging/discharging of EDV batteries. In general, it is observed that numerous EDVs increase the system loading resulting in weakening of the system reliability. However, the paper comes to the conclusion that EDVs could support the system to some extent, depending on the penetration level of EDVs, if an appropriate charging/discharging strategy is applied. Besides this technical question the paper also addresses the costs of the system reserve provision required for the system reliability support. A system operator could engage additional power plants in order to maintain the system reliability or, if this is more cost effective, the support could be provided by EDVs applying the appropriate charging/discharging strategy. The paper proposes a new approach for the techno-economic assessment of possible solutions that are ranked by its price-performance ratio.
COBISS.SI-ID: 10964308