Project Details

Name Purtse Wind Project
Capacity UP TO 40 MW
Location Ida-Virumaa province, 3 km south of Baltic sea, Estonia
Grid connection 7 km away from 330 kV Püssi substation (Built in 2011) Connection approved by Eesti Energia
Pre-feasibility study Commissioned from Garrad Hassan & Partners (UK)
Wind monitoring Commissioned from Garrad Hassan & Partners (UK)
Wind monitoring masts 2 x 70m Class 1 Hi Mast system supplied by Nexgen (UK) Monitoring at 4 levels: 70m, 60m, 50m, 40m
Planning and Environmental Impact Assessment Commissioned from Hendrikson & Ko. And approved by the Estonian Government
Land lease 50-year land lease agreements with land owners.


Turbine models Undecided (received bids)
Turbine rating 2 – 2.5 MW
Number of turbines 13 approved
Rotor diameter 90m
Hub height 105m

Output Details

Production of Electricity 110 GWh/year
Equivalent homes powered *
CO2 savings 283,250 tonnes over the period of 2.5 years
Number of cars with equivalent emission *
CO2 trading Registered with the government of Estonia for the sale of ERUs during 2010-2012


Brief site description

Raunistal AS (subsidiary of Greta Energy in Estonia) is developing the Purtse Wind Farm with the projected capacity of 40 MW in Ida-Virumaa province, Lüganuse and Sonda municipalities in the northeast of Estonia. The site has a total area of approximately 1500 Ha and is located 1km west of the village of Purtse and 3km south of the Baltic Sea coast. The terrain consists mainly of open fields with a few areas of scattered trees and bushes. The site is flat and to the north of the site the land slopes gently down to the Baltic coast. The land is used for farming. One part (approximately half) of the land is privately owned and the other part is owned by the government. The site planning was approved by the Estonian government, land leases obtained with private land owners.


Feasibility Study and Wind Measurement

In 2005 preliminary feasibility study for the Purtse project was developed by a world recognized engineering-consulting company Garrad Hassan and Partners (UK). As a result of this study and internal economic analysis, Raunistal and Greta Energy concluded that the existing wind conditions on the site and economic situation in Estonia provide strong ground for the development of a wind power project on the Purtse site.

Since March 2006, Garrad Hassan has been conducting wind monitoring campaign for the Purtse site. The first 70-meter meteorological mast was installed on the site in March 2006 and the second one in October 2006. Both are manufactured by Nexgen (UK) and its technology accounts for possible loss of data due to special weather conditions such as icing.

Four quarterly reports on the wind monitoring for the Purtse site have shown results that are in line with those provided by the preliminary feasibility study. In addition, the study of correlation between wind measurements on the site and long term data from other sources fortifies the robustness of the results. In March 2008 the project collected 2-year wind data based upon which bankable energy assessment report was completed by Garrad Hassan in July 2008. The fact that the report was based upon the wind monitoring carried out by an experienced industry consultant will allow Greta Energy to make an accurate assessment of the wind conditions and the risks of further developing and financing of the Purtse project.



Garrad Hassan also completed a site-condition-report in July 2008, which will be provided to selected turbine manufacturers. At this stage Raunistal is in the process of negotiations with several manufacturers to make a final decision about the technology that shall be used for the wind farm. The research conducted by Garrad Hassan proves that turbines with installed capacity of 2 MW, a rotor diameter of 90 meters and a hub height of 105 meters exhibit the highest energy output among the considered turbines.


Grid connection

The site is approximately 6 km away from 330 kV Püssi substation. In January 2008, Raunistal signed an agreement on grid connection with Eesti Energia (local utility company responsible for power transmission in Estonia) at the Püssi substation.

Connection point (Pussi substation) was built in September 2011.


Environmental Impact Assessment and Emission Reduction Units

Detailed planning of the site, strategic environmental assessment and obtaining of all required permits are being prepared by local reputable consulting company Hendrikson & Ko. The development and comprehensive planning of Purtse Windmill Park made by Hendrikson & Ko is based upon the modern strategic planning procedure. The strategic environmental impact assessment, in its turn, creates ground for obtaining of all necessary permits related to construction and operation of the wind project.

Greta Energy is developing projects in Estonia aimed at the production of green energy; therefore, the company is entitled for so called Emission Reduction Units (ERUs) according to Kyoto Protocol, where each unit is equivalent to 1 tonne of carbon dioxide reduced. The Purtse project is registered with the government of Estonia for sale of its ERUs during 2010-2012.


Land Leases

Raunistal has negotiated 50-year land leases with the land owners. The lease agreements are signed and the approval of the detailed planning process was obtained. Public land agreement is scheduled for the end of spring 2012.


Schedule of operations and possibilities for expansion

The construction should start in fall 2012 and commercial operations are expected to commence early 2014.

According to Eesti Energia available interconnection capacity at the Püssi substation is as high as 500 MW, which allows to construct an off-shore project with an installed capacity of up to 450 MW.


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