Pumped storage |
Above: Manara Lower reservoir in Israel Copyright ZEER
j and generate with a higher potential from Blaiksjön-to-Storuman. If Juktan is restored as a pumped storage power
plant, it will be Sweden’s largest pumped storage power plant with a storage capacity of approximately 300,000 Tesla batteries. This giant battery can store energy without any major energy losses once the water is pumped to the highest level in the Blaiksjön Dam. Furthermore, this type of large-scale energy storage is necessary to stabilise the electricity grid and to help enable the significant industrial investments that are taking place in northern Sweden. The feasibility study is ongoing until mid-2023 and when a decision is made on a return to pump operation, commissioning is expected to be in 2031.
Israel The Israel Government through the Electricity Authority
and Israel Electric Company is encouraging the private sector to initiate and operate private alternative power systems. The Manara power station, operated by an operation and maintenance contractor, will serve as a hot reserve for the Israel Electric Company during times of high demand when it is required to supply high production capacities. The scheme for daily production of electricity will be determined by IEC, who will dispatch the power station for electricity supply to the grid in accordance with its needs. Based on the principles of the tariff arrangements, the pumping costs during production will be totally covered by the Israel Electric
Company through its payments for the electricity produced.
Manara is a kibbutz in northern Israel. Located in the Upper Galilee adjacent to the Lebanese border and overlooking the Hula Valley, it falls under the jurisdiction of Upper Galilee Regional Council. The Manara Pump Storage Project will have an installed capacity of 156MW. The powerhouse is situated in a cavern inside the mountain hills and includes one pump-turbine, one motor-generator and a step-up transformer with a total installed capacity of 156MW. The upper reservoir with an active storage of 1.2Mm3 is designed as daily reservoir. The power water way with a length of round 1100m and 3m diameter is connected to the lower reservoir with an active storage of 1.24Mm3
.
Author info The author is Ernst Zeller, Managing Director, Country Manager for Austria and Regional Director for Hydropower at AFRY. Over several decades, AFRY has applied its engineering expertise to more than 60 pumped storage projects worldwide. The company’s experience and expertise covers site evaluation, concept and feasibility studies, electro-mechanical and civil design, and construction management for storage power plants in Europe and abroad.
The design of the system is compliant with a daily cycle (generation and pumping). The project includes one pump-turbine unit that is able to convert the hydraulic energy into electric energy and vice-versa. The pump-turbine is capable of fully automatic operation and of providing several operating modes and capabilities. In turbine operation, the pump-turbine is suitable for frequency control within all the load range. The entire start/stop, dewatering, coupling, operation and synchronisation will be automatically controlled by means of computerised controllers, connected to indicators and sensors on the systems and motors. This will ensure correct operation as high level of availability, reliability and maintainability is required in order to satisfy grid requirements. AFRY’s assignment covers Owner’s Engineering services for Ellomay PS Ltd. It will be an important role to ensure timely, cost and quality fulfilment for the owner, working closely with the EPC Contractor, Electra Infrastructure Ltd. Beside the site activities, AFRY will review the full design and will support the client during commissioning of the project. The overall schedule for AFRY’s services is about 60 months. At AFRY we are convinced about the dispatch of
renewable energy in the near future, and are very pleased to bring this important infrastructure project into construction and operation in due time. ●
20 | July 2022 |
www.waterpowermagazine.com
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