
A fully sustainable energy system for the Åland islands is possible by 2030 based on the assumptions in this study. Several scenarios were constructed for the future energy system based on various combinations o. . ••A fully sustainable energy system for the Åland Islands is possible by. . RE renewable energyESS energy storage solutionsPV . . Islands and regions of archipelago represent interesting case studies on sustainable energy systems. Firstly, they tend to be compact geographic areas with homogeneous po. . The methodology of this study is divided into four main sections. A short description of the EnergyPLAN advanced energy system analysis computer model [18] will be followed by a. . Table 3, Table 4, Table 5 show the installed capacities of major technologies that resulted in least cost solutions for each scenario after iteration. In addition, simplified flows o. . A reliable energy system based on high sustainability criteria seems technically feasible for Åland in 2030. Through the integration of the power, heat and transport sectors, as well a. [pdf]

This paper introduces the resource, status and prospect of solar energy in Iran briefly. Among renewable energy sources, Iran has a high solar energy potential. The widespread deployment of solar energy is promisi. . Solar energy is a potential clean renewable energy source. Solar power generation. . Iran has huge reserves of both natural gas and oil [25], [26]. Iran holds nearly 10% of the world’s crude oil reserves and 13% of OPEC reserves [26]. About 70% of Iran’s crude oil reserve. . It expected global PV installations to slow from over 20% annual growth in 2013 and 2014 to 16% next year. The total global solar power capacity will grow from 98 GW in 2012 to 308 G. . Solar energy is one of the best renewable energy sources, for this reason different countries have formulated solar energy policies to reducing dependence on fossil fuel. The share o. . 5.1. Current stateNinety nine percent of energy production in Iran comes from oil and gas and only 1% from renewable energy resources. Since Iran has very ric. [pdf]
Iran's potentials for solar-based electricity generation At present, Iran is producing only 0.46% of its energy from renewable energy sources. In 2016, the country's renewable-based electricity generation sector was mainly comprised of 53.88 MW wind, 13.56 MW biomass, 0.51 MW solar and 0.44 MW hydropower .
The potential of harnessing solar radiation in Iran: Generating solar maps and viability study of PV power plants. Renew. Energy 2013, 53, 193–199. [ Google Scholar] [ CrossRef]
Due to the increase in annual electricity consumption, environmental pollutions and the existence of specialized manpower, Iran can supply its electricity consumption from solar energy. Inverters play a significant role in the efficiency of grid-connected PV power plants.
Askari and Ameri (2011) studied the economic feasibility of installing a hybrid power generation system including a PV system, a diesel generator, and batteries in Iran. Their used method was based on solar radiation, annual electric demand, and the rated power produced by the diesel generator.
However, 27 MW of installed wind power capacity was added to the system in 2014 (Farfan and Breyer 2017). Solar power generation has seen high growth in recent years, mainly through photovoltaics (PV) and followed by concentrating solar thermal power (CSP) plants in Iran.
The Yazd integrated solar combined cycle power station is another important solar project in Iran which is a hybrid power station situated near Yazd, which became operational in 2009 , , , , , , , , , , . It is the world’s first combined cycle power plant using solar power and natural gas.

The PV panel consists of multiple modules connected in series or parallel to increase the voltage level or current level, respectively. Figure 2shows the PV cell equivalent circuit composed of a current source, two resistances (series and shunt), and an antiparallel diode. The current source ({I}_{s}) is expressed by de. . The boost converter transfer function can be written as follows : According to the power conservation law the relationship between input/output average currents is given by: The DC bus equation is expressed by: . The inverter which is the adaptation stage, gives us the possibility to convert DC-voltage into AC-voltage with desired frequency and amplitude. We notice that the inverter control allows to ensure a better quality of the. [pdf]
Due to the volatility and intermittent characteristics of solar photovoltaic power generation systems, the energy storage can increase the applicability and exibility of solar pho-tovoltaic power generation systems 1, 2, 3. An energy storage system involves the chargedischarge control and en-ergy management units.
System constitution and architecture A solar PV energy storage system outputs DC electric power by utilizing the PV effect of solar energy. System constitu-tion of solar PV energy storage system as shown in Fig. 1, the DC power is output to the storage battery for the charg-ing purpose after DC-DC conversion control.
The main objective of control strategies is active power control, and reactive power control is a supplementary control. Therefore the coordinate ability of the ESS can be made full use. 16.4.3.3. Control strategy of energy storage for system voltage regulation
Therefore the ESS capacity can be allocated reasonably to restrain the power fluctuation of the PV station and improve the stability of the power system. Hence, The ESS is optimized used. Figure 16.13. Grid-connected control strategy of energy storage system based on additional frequency control.
Furthermore, energy storage systems can support grid balancing by offering flexibility and dependability that can help the grid incorporate intermittent green energy sources. This is crucial because it may reduce the effects of fluctuations in wind or solar power as the proportion of renewable energy in the system increases.
Due to the excellent dynamic response performance of the energy storage device, it can be a primary candidate for the voltage and frequency control in the power system. Therefore energy storage devices enhance the absorption of PV generation with maintaining safety and steady operation in the power system.
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