Multi-objective electro-thermal coupling scheduling model for a hybrid energy system comprising wind power plant, conventional gas turbine, and regenerative electric boiler, considering uncertainty and demand response

An alternative approach for combined frequency control in multi-area power systems with significant wind power plant integration is described and discussed in detail. Demand response is considered as a decentralized and distributed resource by incorporating innovative frequency-sensitive load controllers into certain thermostatically controlled loads. Wind power plants comprising variable speed wind turbines include an auxiliary frequency control loop contributing to increase total system inertia in a combined manner, which further improves the system frequency performance. Results for interconnected power systems show how the proposed control strategy substantially improves frequency stability and decreases peak frequency excursion (nadir) values. The total need for frequency regulation reserves is reduced as well. Moreover, the requirements to exchange power in multi-area scenarios are significantly decreased. Extensive simulations under power imbalance conditions for interconnected power systems are also presented in the paper.

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North Sea region energy system towards 2050: integrated offshore grid and sector coupling drive offshore wind installations

10.5194/wes-2020-60 ◽

2020 ◽

Author(s):

Matti Koivisto ◽

Juan Gea-Bermúdez ◽

Polyneikis Kanellas ◽

Kauhshik Das ◽

Poul Sørensen

Keyword(s):

Power Plant ◽

Wind Power ◽

North Sea ◽

Energy System ◽

Offshore Wind ◽

Wind Power Plant ◽

Offshore Wind Power ◽

The North ◽

The North Sea ◽

Wind Curtailment

Abstract. This paper analyses several energy system scenarios towards 2050 for the North Sea region. With focus on offshore wind power, the impacts of meshed offshore grid and sector coupling are studied. First, a project-based scenario, where each offshore wind power plant is connected individually to onshore, is compared to a meshed grid scenario. Both the amount of offshore wind installed and the level of curtailment are assessed. Then, these results are compared to a scenario with sector coupling included. The results show that while the introduction of a meshed grid can increase the amount of offshore wind installed towards 2050, sector coupling is expected to be a more important driver for increasing offshore wind installations. In addition, sector coupling can significantly decrease the level of offshore wind curtailment.

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Calculation methodology of the energy indicators of an self-contained energy complex including gas turbine plants, wind-driven power plant and electric storage cell

Proceedings of the higher educational institutions ENERGY SECTOR PROBLEMS ◽

10.30724/1998-9903-2020-22-3-36-43 ◽

2020 ◽

Vol 22 (3) ◽

pp. 36-43

Author(s):

Y. E. Nikolaev ◽

V. N. Osipov ◽

V. Y. Ignatov

Keyword(s):

Power Plant ◽

Gas Turbine ◽

Wind Power ◽

Heat Load ◽

Waste Heat ◽

Electric Energy ◽

Wind Power Plant ◽

Electric Load ◽

Waste Heat Boiler ◽

Storage Cell

To supply small cities with electric and thermal energy it is proposed to create selfcontained energy complex based on gas turbine plants (GTP), wind generators and electric storage cell. A scheme for the joint operation of these plants is offered, a methodology for calculating the quantitative characteristics of a wind power plant, gas turbines and electric storage cell is developed. Electric storage cell provide coverage the peak portion of the daily electrical load curve. The heat load is ensured by the operation of the waste-heat boiler and the peak boiler. Using the example of a power complex with an electric load of 5 MW and a heat load of 17.5 MW, the generation of electric energy by wind driven power plant and gas turbine plants, the supply of electric energy from electric storage cell, the heat loads of the waste-heat boiler and peak boiler by months of the year are calculated. When the power share of the wind power plant is 0.2, the electric storage cell provide for an annual period from 5.2 to 10.7 % of the daily demand of the electric load schedule. The electric power of the gas turbine plant in winter is reduced to 70 % of the maximum load of the consumer, in summer - up to 55 %. An increase in the relative share of the power of a WDPP reduces the electric capacity of a gas turbine plants, its cost, while the cost of electric storage cell increases.

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Analysis of an Off-Grid Photovoltaic-Wind Hybrid Power System for Disi Water Pumping Project

International Journal of Thermal and Environmental Engineering ◽

10.5383/ijtee.14.01.006 ◽

2017 ◽

Vol 14 (1) ◽

Keyword(s):

Power Plant ◽

Wind Power ◽

Life Cycle Cost ◽

Water Flow Rate ◽

Ground Level ◽

Energy System ◽

Underground Water ◽

Wind Power Plant ◽

Water Pumping ◽

Production Wells

A standalone hybrid PV/ wind energy system is proposed to be used to continuously power a submersible water pump from a selected well out of 55 production wells located at the Disi aquifer, South of Jordan. Each of these wells has a continuously-operating water flow rate of 288 m3 /h. Excess energy, if any, is to be stored in the form of a pumped water storage at the ground level near the well. Solar radiation and wind speed data for Al-Mudawara border meteorologicalstation, which was taken as a representative of the Disi water aquifer were collected and analyzed. Energy analysis was monthly made on the basis of average daily available energy. The performance of three PV/wind power plant scenarios was analyzed through the study of the underground water pumping wells using Life Cycle Cost (LCC) method. It was found that, for one scenario, the hybridization of a 16.5 MW is produced by PV power plant and 27.5 MW by wind power plant at Al-Mudawara site is the optimal scenario which is economically and technically feasible. It was found that the storage energy covered the load after implementation of the proposed project, the cost of 1 kWh of energy produced was estimated to be 0.16 $/kWh., and the system payback period was 4.5 years.

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