ESIGN AND M ODELLING OF S TANDALONE H YBRID P OWER S YSTEM WITH M ATLAB / S IMULINK
This paper presents a standalone hybrid power system using wind/PV/diesel/Battery energy system with Matlab/Simulink environment. PV & Wind are the primary power sources of the system and battery is used as a backup for long run application. Here we have also compare the performance of PV/Wind/Battery connected system with PV/Wind/Diesel connected hybrid power system. The most frequently used renewable energy sources are those consisting of PV module and/or wind Turbine with/or Diesel generator, and some energy storage or backup system.
Hybrid solar–wind system with battery storage operating in grid-connected and standalone mode: Control and energy management – Experimental investigation
The paper presents experimental results from the operation of a test bench constituted of a Grid-connected Hybrid system. This device includes wind and photovoltaic (PV) physical emulators, battery energy storage, load and a controlled interconnection to the Low Voltage (LV) grid. Both the Wind generation unit and the PV generation unit are connected to the weak AC grid via a single phase inverter with a lead acid accumulator. The grid power inverter is suitably controlled to permit the operation of the system either interconnected to the LV grid, or in standalone mode, with a seamless transfer from the one mode to the other. The paper provides a technical description of the Hybrid system devices and of the inverter energy management, along with extensive measurement results which demonstrate the system capability to operate in the aforementioned mode.
Toward Building a Linked Open Data Cloud to Predict and Regulate Social Relations in the Saudi Society
Background: The trend in producing linked open data to publish high-quality interlinked data has gained widespread traction in recent years. Various sectors are producing linked open data to increase public access and ensure transparency, in addition to a better utilization of government data, namely linked open government data. Problem Definition: As compared to the developed countries, Saudi Arabia lags behind in benefiting from this new era of ubiquitous web of data, despite its publication of government related data in non-linked format. In the context of Saudi open government data, the full potential of multi-category data published by various government agencies at different portals is not being realized as the data are not published in open data format and remain unlinked to other existing datasets. Methodology: To bridge this gap, this study presents a framework to extract and generate semantically enriched data from various data sources under different domains. The framework was used to produce the Saudi linked open government data cloud by interlinking data entities with each other and with external existing open datasets. Results: The effectiveness of our approach is validated by applying it to a socially significant issue, i.e., divorce rate, in Saudi Arabia. By posing smart queries to semantically enriched data, we were able to perform an in-depth analysis of different factors related to increasing divorce rates in Saudi Arabia. Arguably, without using linked open data and related technologies such analysis would not have been possible. Finally, we also present a simulated visual environment for better understanding and communication of such analysis for decision and policy makers.