Mitigating zero dynamic attack in communication link-enabled droop-controlled hybrid AC/DC microgrids

DC microgrids look attractive in distribution systems due to their high reliability, high efficiency, and easy integration with renewable energy sources. The key objectives of the DC microgrid include proportional load sharing and precise voltage regulation. Droop controllers are based on decentralized control architectures which are not effective in achieving these objectives simultaneously due to the voltage error and load power variation. A centralized controller can achieve these objectives using a high speed communication link. However, it loses reliability due to the single point failure. Additionally, these controllers are realized through proportional integral (PI) controllers which cannot ensure load sharing and stability in all operating conditions. To address limitations, a distributed architecture using sliding mode (SM) controller utilizing low bandwidth communication is proposed for DC microgrids in this paper. The main advantages are high reliability, load power sharing, and precise voltage regulation. Further, the SM controller shows high robustness, fast dynamic response, and good stability for large load variations. To analyze the stability and dynamic performance, a system model is developed and its transversality, reachability, and equivalent control conditions are verified. Furthermore, the dynamic behavior of the modeled system is investigated for underdamped and critically damped responses. Detailed simulations are carried out to show the effectiveness of the proposed controller.

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Reliability of the Communication Link Consisting of Primary and Reserve Channels

Telecommunications and Radio Engineering ◽

10.1615/telecomradeng.v60.i1012.50 ◽

2003 ◽

Vol 60 (10-12) ◽

pp. 51-58

Author(s):

I.P. Panfilov ◽

A.A. Scopa

Keyword(s):

Communication Link

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Efficient GaN Interface for emerging self-consumption scenarios in DC microgrids

2020 5th International Conference on Smart and Sustainable Technologies (SpliTech) ◽

10.23919/splitech49282.2020.9243805 ◽

2020 ◽

Author(s):

Massimo Merenda ◽

Giovanna Adinolfi ◽

Demetrio Iero ◽

Angelo Merola ◽

Giorgio Graditi ◽

...

Keyword(s):

Dc Microgrids

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Analysis of Inter-Satellite Optical Wireless Communication System

International Journal of Advanced Research in Computer Science and Software Engineering ◽

10.23956/ijarcsse.v7i10.267 ◽

2017 ◽

Vol 7 (10) ◽

pp. 10

Author(s):

Rajbir Singh

Keyword(s):

Wireless Communication ◽

Optical Networks ◽

Data Transmission ◽

High Speed ◽

Open Space ◽

Communication Link ◽

Optical Wireless Communication ◽

Optical Wireless ◽

High Speed Data ◽

Speed Data Transmission

Optical networks are bandwidth efficient networks are used for long haul communication providing seamless data transfer. For high speed data transmission in open space between different satellites, Inter-satellite Optical wireless communication (IsOWC) is widely used .In this paper we have evaluated the performance of IsOWC communication link for high speed data transmission .The performance of the system is evaluated on the basis of qualitative parameters such as Q-factor and BER using optisystem simulator.

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Conservation and Preservation of Nature Reserves, Monuments andSpecial Architectural or Historic Interest in Nigeria: Towards Promotion of Sustainable Cultural Tourism

JOURNAL OF ADVANCES IN HUMANITIES ◽

10.24297/jah.v3i2.1126 ◽

2015 ◽

Vol 3 (2) ◽

pp. 201-218

Author(s):

Francis Chuma Osefoh

Keyword(s):

Cultural Tourism ◽

Nature Reserves ◽

Communication Link ◽

Built Environments ◽

Tourist Attraction ◽

The Past ◽

Personal Experiences ◽

Historical Heritage ◽

Developed Nations

Some of the renowned world tourism countries have special peculiarities in character in terms of their nature reserves and built environments; that made them stand out for their attractions and visits. These qualities range from conservation and preservation of nature reserves, built environments- epoch architectural supports over the years; historical heritage; political; religious; socio-economic; cultural; andÂ high technology that enhance culture. The virtues of multi- ethnic groups and multi- cultural nature gave Nigeria a rich cultural heritage, and she is blessed with natural wonders, unique wildlife, and a very favorable climate. More often than not less attention and importance are placed over the nature reserves and built environments to the detriment of tourism in lieu of other sectors. Summarily the country lacks the culture of conservation and preservation of her abundant resources to promote cultural tourism. Case study strategy was applied in the research tours with reports of personal experiences, documentaries and analyses of sites visited in Europe and Nigeria were highlighted with references to their attributes in terms of structures and features that made up the sites as relate to culture and attraction.The task in keeping rural, city landscapes and nature reserves alive stands out as the secret of communication link from the past to present and the future; which tourism developed nations reap as benefits for tourist attraction.

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