Grid-connected renewable energy source systems: Challenges and proposed management schemes

Alsayegh, Osamah A.; Alhajraf, S.; AlBusairi, H.

doi:10.1016/j.enconman.2009.11.042

Cited by 82 publications

(41 citation statements)

References 8 publications

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“…Microgrids can be seen as miniature versions of the larger utility grid except that, when necessary, they can disconnect from the main grid and can continue to operate in 'islanded mode' [1]. Despite their potential advantages, the use of renewable sources inserts uncertainty into the system, due to their output profile which strongly depends on local weather conditions: in some cases the lack of monitoring and control of these energy sources might contribute to the instability of the electric grid [2], [3]. For these reasons, one of the main challenges in the development of microgrids is to deploy a control system to manage controllable loads and guarantee grid stability with minimum the energy cost.…”

Section: Introductionmentioning

confidence: 99%

A supervisory approach to microgrid demand response and climate control

Korkas

Baldi

Michailidis

et al. 2016

2016 24th Mediterranean Conference on Control and Automation (MED)

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Abstract-Microgrids equipped with small-scale renewableenergy generation systems and energy storage units offer challenging opportunity from a control point of view. In fact, in order to improve resilience and enable islanded mode, microgrid energy management systems must dynamically manage controllable loads by considering not only matching energy generation and consumption, but also thermal comfort of the occupants. Thermal comfort, which is often neglected or oversimplified, plays a major role in dynamic demand response, especially in front of intermittent behavior of the renewable energy sources. This paper presents a novel control algorithm for joint demand response management and thermal comfort optimization in a microgrid composed of a block of buildings, a photovoltaic array, a wind turbine, and an energy storage unit. In order to address the large-scale nature of the problem, the proposed control strategy adopt a two-level supervisory strategy: at the lower level, each building employs a local controller that processes only local measurements; at the upper level, a centralized unit supervises and updates the three controllers with the aim of minimizing the aggregate energy cost and thermal discomfort of the microgrid. Comparisons with alternative strategies reveal that the proposed supervisory strategy efficiently manages the demand response so as to sensibly improve independence of the microgrid with respect to the main grid, and guarantees at the same time thermal comfort of the occupants.

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Section: Introductionmentioning

confidence: 99%

A supervisory approach to microgrid demand response and climate control

Korkas

Baldi

Michailidis

et al. 2016

2016 24th Mediterranean Conference on Control and Automation (MED)

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“…Moreover renewable energy sources (RESs) give each nation energy dependency by reducing the energy and fuel required to be imported. These features encourage many governments to put an ambitious goal to supply a significate portion of their electrical grid from renewable energy sources such as PV (80% in Germany by 2050 [5]). Figure 1 shows that the trend of the advanced countries in energy sector is to increase the installation of the PV capacity.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 shows that the trend of the advanced countries in energy sector is to increase the installation of the PV capacity. Therefore they introduced variant rules and regulations to supply electrical grid from RESs such as: Feed in tariff, subsidies and income tax free [5]. Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic System Integration Where Feed In Tariff Applied With Improving Return On Investment

Bilal¹,

Fadi²,

Nasrudin³

2016

Sixth International Conference on Advances in Computing, Electronics and Electrical Technology - CEET 2016

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Abstract-High photovoltaic (PV) integration in electrical grid is one of the strategic goals for many countries nowadays. That's why many governments introduced incentive policies seeking for PV projects funded by private sector. These kinds of projects have to be a positive net present value (NPV) in order to get sponsorship by non-government sector. This paper investigates the PV solar system financial analysis in Malaysia and Turkey. In developing counties, the governments are looking for more renewable energy (RE) sources installation. Thus, they implemented Feed-in Tariff (FiT) mechanism to accelerate investment in renewable energy technologies. As the efficiency of the PV cell increases and the cost/Wp decreases with time, the expected net present value (NPV), return on investment (ROI) and payback period for the PV system are going to achieve a significant increase. The FiT rate in Malaysia is significantly higher than Turkey and the purchase agreement is longer. These advantages would make Malaysia a better place for PV system investment. Moreover, this paper proposed the PV system to be installed at the roof of building, merged with another suitable business such as; roller skating rink or cafe. This combination makes the PV project making income at day time via solar radiation, while generating income at evening and night time via the other business. The analysis results revealed that, the combination of PV system with roller skating rink or cafe can reduce the payback period and make a wonderful combination between green energy and people.

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“…Ismail et al [13] optimized a hybrid system that comprises of Photovoltaic (PV) panels, a battery system, and a microturbine as a backup power source for a remote community in Palestine. Alsayegh et al [14] analyzed grid-connected hybrid RES systems. This paper deals with problems and challenges concerning reliability and the instability of grid-connected energy systems.…”

Section: Introductionmentioning

confidence: 99%