Achieving Renewable Energy Targets Without Compromising the Power Sector’s Reliability (original) (raw)
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International Journal of Power Electronics and Drive Systems (IJPEDS)
This article consists of studying the reliability of the Moroccan electricity grid as well as verifying the plan of production for 2030. To propose an adequate production plan for 2050, a production plan where renewable energies take a large place in the production park. Our objective is the planning and optimization of the Moroccan energy system with a strong integration of renewable energy sources or even 100% integration by guaranteeing the reliability of the electrical system. In this study, we evaluated the reliability of the Moroccan electricity grid in the presence of renewable electricity production based on the energy plan simulator supplemented by Monte Carlo simulations based on probabilistic approaches. The first part of this work consists of projecting demand for 2030-2050 and studying the impact of energy efficiency on forecasts. In the second part, we integrated the existing means of production and the projected demand on energy plan. In the third part we studied the ...
Adding solar PV to the Saudi power system: what is the cost of intermittency
Adding solar PV to the Saudi power system: what is the cost of intermittency, 2017
With 2015 as a reference year, we quantify the costs of solar photovoltaics (PV) intermittency and integration to power utilities in Saudi Arabia. We define intermittency costs as the costs of ramping and maintaining spinning reserves, while integration costs are defined as the costs of intermittency plus the costs of grid upgrades if they were needed. The operational facets of PV integration to grid operators will be more pronounced with higher PV penetration, so to focus on operation, we exclude capital costs. The cost of intermittency, excluding any benefits attained from PV operation, rises to 1.3 ¢/kWh of energy provided by PV at 20 GW of PV deployment. At low levels of penetration, renewables may impose negligible cost or even confer net benefits. However, above a certain level, costs will always outweigh benefits-what we refer to as the 'Operational Blend Wall'. It was found that the operational blend wall for Saudi Arabia was 11 GW, based on actual fuel costs prevailing in the period of study. The net financial effect of PV integration on operation, considering both costs of benefits, was an increase of 0.04 ¢/kWh and occurs at 20 GW of PV deployment. The maximum capacity of PV addition considered is 20GW, which represents a 25% penetration level within the power system.
Adding Photovoltaics to the Saudi Power System: What are the Costs of Intermittency?
Research Papers in Economics, 2016
Intermittent generation from wind or photovoltaics (PV) imposes a cost on the power systems in which they are deployed. These costs vary regionally due to different fuel costs and ramping flexibility of existing grid capacities. With 2015 as a reference year, we examine the costs of PV intermittency and costs of integration to power utilities in Saudi Arabia, using a least-cost approach for the power utilities. The operational facets of PV integration to grid operators will be more pronounced with higher PV penetration, so, to focus on system operation, we exclude the capital costs. The excess of the price paid to new PV generators over the current average consumer tariff would also have to be covered by the utility, and will depend on the details of the power purchase contracts.
On the Use of Dynamic Reliability for an Accurate Modelling of 2 Renewable Power Plants 3 4
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Robustness of electricity systems with nearly 100% share of renewables: a worst-case study
ArXiv, 2021
Several research studies have shown that future sustainable electricity systems, mostly based on renewable generation and storage, are feasible with today’s technologies and costs. However, recent episodes of extreme weather conditions, probably associated with climate change, cast shades of doubt on whether the resulting generation portfolios are sufficiently robust to assure, at all times, a suitable balance between generation and demand, when adverse conditions are faced. To address this issue, this work elaborates a methodology intended to determine a sustainable electricity system that can endure extreme weather conditions, which are likely to occur. First, using hourly production and demand data from the last decade, along with estimates of new uses of electricity, a worstcase scenario is constructed, including the storage capacity and additional photovoltaic power which are needed to serve the demand on an hourly basis. Next, several key parameters which may have a significan...