Hydropower: 13.199 GWh
The total energy generation of Landsvirkjun’s hydropower stations was approx. 13,199 GWh in 2018, compared with 13,459 GWh in the previous year.
Landsvirkjun operates 15 hydropower stations all over Iceland, divided into 4 areas of operation.
There are 7 power stations in the Þjórsá area, with a total of 19 generating units and a number of waterway structures. The area spans from the Hofsjökull Glacier and down to the Búrfell Hydropower Station.
There are 3 power stations in the Sog area with a total of 8 generating units and several waterway structures by the Þingvallavatn Lake and Úlfljótsvatn Lake.
14,195 GWh of electrical energy was fed into the Landsnet transmission grid by Landsvirkjun in 2018 - an increase of 2.1% when compared with the previous year.
The Laxá Power Stations are located in the Blanda area. There are three stations in the area, with five turbines and the waterway at the Blanda Hydropower Station spans a length of 25 km, from the Reftjarnarbungu and down to the Gilsá River
The fourth operational area is the Fljótsdalur Hydropower station, the largest hydropower station in the country, with 6 generating units and extensive waterway structures including tunnels measuring 70 km in length. The Station generated 4,928 GWh this year, or approximately 34% of Landsvirkjun's total generation.
Landsvirkjun generates 92% of its energy using hydropower and 8% using geothermal energy
Krafla celebrates 40 years of operations
The Krafla Geothermal Power Station celebrated 40 years of operations this year. The station initially began operations in August 1977, but a steam shortage created delays and the station was not fully commissioned until February 1978. Steam extraction and drilling were affected by seismic activity and nine consecutive volcanic eruptions, between 1975 and 1984.
Landsvirkjun acquired Krafla from the Icelandic State in 1985. Landsvirkjun decided to introduce a second unit at the station in 1996 to extract more steam. New drilling methods, such as directional drilling, enabled the company to drill new wells and repair older ones.
Assessment of Fljótsdalur Hydropower Station’s operations
The results of an assessment, based on the Hydropower Sustainability Assessment Protocol (HSAP), were published this year.
The results revealed that the operation of the station is considered outstanding in terms of the sustainable use of hydropower, and many of the work procedures are considered to be “best available practice” according to the Protocol. The extensive assessment included a detailed analysis of 17 categories relating to the operation of the Station and reflect how well operations comply with the international criteria for sustainable development.
The station met the requirements for best possible practice (grade 5) in 11 categories out of the 17 that were assessed. The station meets requirements for good practice (grade 4) in four categories. Two categories were not included in the assessment.
Power station operations
The operation of Landsvirkjun’s power stations was successful throughout the year.
There were 95 unforeseen interruptions in 2018, compared with 82 in the previous year.
Landsvirkjun's goal is to ensure that generating units in the power stations are available 99% of the year, not accounting for routine maintenance periods. This goal was achieved this year, as units were available 99.7% of the time compared with 99.8% in the previous year.
Landsvirkjun operates in accordance with an integrated, certified Quality Management and Environmental Safety Management System, based on ISO 9001, ISO 14001, OHSAS 18001 and the Internal Electrical Safety Operation System (RÖSK), which fulfils the criteria set out by the Iceland Construction Authority on electrical safety issues. Landsvirkjun has been certified as a producer of green electricity by the German company TÜV SÜD who specialise in the certification of green electricity. In addition, the Company’s IT division’s safety management system is certified in accordance with ISO 27001.