In the latest issue of the TSO News you will learn about “non-network solutions”, in particular how demand management helps operators save money and balance the system.
And also why operators prefer hydrogen over batteries and how a TSO is successfully cooperating with other energy companies to build new power plants.
1. Non-network Solutions as a tool for accumulating funds for TSOs
The Australian TSO TransGrid, which has been delivering power to more than half a million customers over 50 years, uses “non-network solutions”, all the while solving two problems – growing demand and worn-out infrastructure. The Australian TSO is looking for solutions to technical and other problems through energy efficiency, demand management, implementation of reliability standards, development of local generation and planning of more efficient network development.
If the demand should be reduced, the operator has contracts with enterprises that have devices that are responsible for reducing the load and disconnecting from the grid. Non-network solutions will allow the operator to reduce investment in upgrading and development of the grid, as well as contribute to accumulating the required amount of funds for the construction of a more efficient 20 kV 330 kV underground cable line between in Potts Hill substations and Alexandria.
2. Californian TSO CAISO has prepared changes to the rules for activating power reserves
CAISO, California’s TSO, has sent two proposals for adjusting the power reserve activation rules to the Federal Energy Regulation Commission (FERC). According to the operator, these changes will enable him to more quickly manage the demand (Demand Reponse, DR) in emergency situations, as well as restricting fines imposed on generating facilities that have failed to fulfil their obligations to activate reserves due to independent reasons.
Under current rules, CAISO can use DR-resources only after a special warning (operational message) about the possibility of activating the DR-reserve. In reality, such occurrences are quite rare, mainly before contacting system operators in neighbouring operating zones, that is, after exhausting all other types of resources inside their operating zone. The proposed changes envisage activating DR-reserves by the decision of the system operator at any time after the issuance of an operational message. In addition, the TSO proposes to exempt from penalising the generators who provide balancing services in the CAISO operating area, not only in cases of force majeure, but also scheduled trips for non-compliance reasons, from fines for non-fulfilment of their obligations.
3.The Danish operator to store excess green energy in cylinders
The wind plus the sun and water equals hydrogen. This electrolysis reaction, which is used by several Danish companies, is called Power-to-X (PtX). This method allows you to convert all surplus electricity from wind and solar stations to pure hydrogen, which then can be used as fuel. Previously, it was believed that such plants would be unprofitable, so it is not worth investing in construction. But according to the results of the analysis, the Danish TSO predicts that PtX plant investors will receive enormous profits. According to the operator, this technology can make a revolution in the energy sector. At the moment, it is possible to save electricity in accumulator batteries. However, the operator is not considering this option. Energinet believes that accumulator batteries are a costly solution that is not suitable for long-term electricity conservation and complicates its export.
4.Italian TSO Terna, together with Eni, CDP and Fincantieri, to build wave power plants
CEOs of Eni, CDP and Fincantieri signed an agreement on the development and construction of wave power plants on an industrial scale. The agreement aims to combine the experience of enterprises for the industrial scale of the pilot project to convert the inertia of the sea wave to electricity (ISWEC). Under the agreement, Italian TSO Terna will explore the best options for connecting and integrating wave power plants into the grid.
In the future, the issue of technology expansion across Italy and the construction of industrial plants, which will be able to provide the required amount of electricity only at the expense of waves, especially near small islands, will be considered.
5.The German TSO 50Hertz completed a large-scale wind power project Wikinger
Transmission system operator 50Hertz completed works on connecting the offshore wind power plant Wikinger (TSO: Iberdrola) and Arkona (TSO: E.ON and Equinor) in the Baltic Sea to the mainland power grid right on schedule. The connection of offshore wind farms Wikinger and Arkona – 50Hertz’s largest investment project (about 1.3 billion EUR), began in 2015. After three years of construction, the stations started operating in test mode, transmitting electricity through three-phase 220 kV submarine cables with the total length of 93 km. The three-phase 220 kV technology network connection was introduced for the first time in the Baltic Sea. Using higher voltage allows increased capacity of cables. Previously, three-phase cables with a voltage of 150 kV were used for the connection of offshore wind power plants in Germany and the Baltic Sea.
Interestingly enough, in planning the construction of the offshore substation the captain of the yacht Josh Brromann was engaged on a volunteer basis, after commissioning he went on a round-the-world trip. The TSO thanked the captain for his help.