Improve wind energy penetration in an isolated power system by a stand-alone wind pumped storage hydropower plant

Frequency control is one of the most critical tasks in isolated power systems, especially in high renewable penetration scenarios. This paper presents a new hydropower pumped-storage dual control strategy that combines variable-speed-driven pumps and fixed-speed-driven pumps. A possible case for implementation of such a control scheme is described based on El Hierro Island’s power system. This isolated power system consists of a hybrid wind pumped-storage hydropower plant and diesel generators. The pumped-storage power plant is divided into a hydropower plant equipped with four Pelton turbines and a pump station equipped with both fixed- and variable-speed pumps. According to the proposed control scheme, frequency regulation will be provided by a dual controller: a continuous controller for the variable-speed pumps and a discrete controller for the fixed-speed pumps. The Pelton units, which operate as synchronous condensers, also supply the power system inertia. Therefore, diesel units may be disconnected, decreasing generation costs and greenhouse gas emissions. Owing to the combination of both controllers and the inertia of the Pelton units, an acceptable frequency regulation can be achieved. This technique has been validated through computer simulations.

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Prospects of Storage and Pumped-Storage Hydropower for Enhancing Integrated Nepal Power Systems

Hydro Nepal Journal of Water Energy and Environment ◽

10.3126/hn.v15i0.11290 ◽

2014 ◽

Vol 15 ◽

pp. 37-41 ◽

Cited By ~ 1

Author(s):

Neeraj Kumar Sah ◽

Madhab Uprety ◽

Sangharsha Bhandari ◽

Prativa Kharel ◽

Saurav Suman ◽

...

Keyword(s):

Power Systems ◽

Power System ◽

Power Plants ◽

Peak Load ◽

Electrical Energy ◽

Hydropower Plant ◽

Hydropower Plants ◽

Pumped Storage ◽

Electrical Demand ◽

Installed Capacity

An Integrated Power System (IPS) should have electrical energy generating plants for base load (e.g., nuclear and thermal plants) and peak load (e.g., hydropower plants) so that they can work in coordination in such a way that the demand is met in time. In Nepal, the Integrated Nepal Power System (INPS) is a hydro-dominated system where the base and intermediate power demands are covered primarily by run-of-river hydropower plants and the peak demand by seasonal storage and several diesel power plants of lower capacity. The INPS should have sufficient natural storage and forced storage power plants to improve the system’s reliability. On top of that, daily peak electrical demand could also be adequately covered by demand-side management, using a pumped-storage hydropower plant that can employ a system’s surplus energy during low demand period for pumping. To rectify this extreme imbalance of installed capacity in Nepal, this paper explores the prospect of storage and pumped-storage power plants for enhancing INPS. A case study of Rupa-Begnas pumped-storage hydropower is highlighted for these purposes.DOI: http://dx.doi.org/10.3126/hn.v15i0.11290HYDRO Nepal JournalJournal of Water, Energy and EnvironmentVolume: 15, 2014, JulyPage: 37-41

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Contribution of non‐conventional pumped‐storage hydropower plant configurations in an isolated power system with an increasing share of renewable energy

IET Renewable Power Generation ◽

10.1049/iet-rpg.2019.0874 ◽

2020 ◽

Vol 14 (4) ◽

pp. 658-670 ◽

Cited By ~ 3

Author(s):

Daniel Fernández‐Muñoz ◽

Juan I. Pérez‐Díaz

Keyword(s):

Renewable Energy ◽

Power System ◽

Hydropower Plant ◽

Pumped Storage

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The Research of Wind-Light Complementary Based on Pumped Storage Power System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.354-355.1132 ◽

2011 ◽

Vol 354-355 ◽

pp. 1132-1136 ◽

Cited By ~ 1

Author(s):

Yan Qing Li ◽

Man Man Yang ◽

Liang Zhao ◽

Fu Ju Wang

Keyword(s):

Energy Storage ◽

Solar Energy ◽

Power System ◽

Wind Energy ◽

Power Supply ◽

Structure Characteristics ◽

Working Principle ◽

Pumped Storage ◽

Development Prospects

The wind-light complementary based on pumped storage power system makes use of wind energy, solar energy and their complementary in time and area to generate clean power, and utilizes pumped storage to realize energy storage and backup power supply, which has broad development prospects. The paper begins with the necessity of making use of wind energy and solar energy, then introduces the structure characteristics, working principle, feasibility and advantages of the wind-light complementary based on pumped storage power system, and presents the system’s matching calculations.

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