Difference between revisions of "Wind Energy - Resource Analysis"

From energypedia
***** (***** | *****)
***** (***** | *****)
Line 1: Line 1:
 
<span style="color: rgb(255, 0, 0);">Work in progress</span><br>  
 
<span style="color: rgb(255, 0, 0);">Work in progress</span><br>  
  
Anhang C_ToR Feasibility Study<br>
+
Anhang C_ToR Feasibility Study<br>  
  
== Site-specific Investigations<br> ==
 
  
=== Network characteristics at the injection point<br> ===
 
  
Analysis of transformer/feeder/transmission capacities, voltage variations, fault levels and other grid characteristics (including upgrades or reinforcements, if need be) that are relevant for the design and future operation of wind parks at the selected site or, for that matter, the points at which the loads of the wind parks will be injected into the transmission network.<br>
+
Gasch Bewertungsmethoden für Sites (Gasch Kapitel 4)
  
=== Site conditions<br> ===
+
== Site-specific Investigations<br> ==
  
Site-specific examination of ground and soil conditions, accessibility (e.g. roads), availability of ancillary material and equipment (e.g. cranes), environmental hazards, climatic risks, legal constraints (e.g. property rights), licensing/authorization procedures and other factors or obstacles that affect the suitability of the selected site (the partner will bear the cost for soil bearing costs, as well as topographic surveys, if needed). <br>Site-specific examination of environmental and social aspects. The study shall contain information on national regulations on the requirements of an environmental (and social) impact analysis or, if national regulations are not available, it shall follow international recommendations. <br>
+
=== Network characteristics at the injection point<br> ===
  
=== <br>Wind regime<br> ===
+
Analysis of transformer/feeder/transmission capacities, voltage variations, fault levels and other grid characteristics (including upgrades or reinforcements, if need be) that are relevant for the design and future operation of wind parks at the selected site or, for that matter, the points at which the loads of the wind parks will be injected into the transmission network.<br>  
  
Preparation and processing of available wind data for estimating the daily, monthly and seasonal electrical output of the wind farm (calculate a norm year by correlation of measured wind data with long-term meteorological wind speed data). Determine the impact of wind parks on the short-term and long-term scheduling of existing power plants with a view towards minimizing system generation costs. Estimate the savings/benefits attributable to wind park integration such additional capacity available during peak load periods.<br>Correlate monthly diurnal wind speed patterns with monthly load curves based on hourly wind and load data.<br>Depending on the availability and quality of repeated samples of the probability distribution of the wind speed at the selected sites, the study should also perform wind reliability/predictability calculations that can be used to approximate the capacity credit (load carrying capability) of the wind farm.
+
=== Site conditions<br>  ===
 +
 
 +
Site-specific examination of ground and soil conditions, accessibility (e.g. roads), availability of ancillary material and equipment (e.g. cranes), environmental hazards, climatic risks, legal constraints (e.g. property rights), licensing/authorization procedures and other factors or obstacles that affect the suitability of the selected site (the partner will bear the cost for soil bearing costs, as well as topographic surveys, if needed). <br>Site-specific examination of environmental and social aspects. The study shall contain information on national regulations on the requirements of an environmental (and social) impact analysis or, if national regulations are not available, it shall follow international recommendations. <br>
 +
 
 +
=== <br>Wind regime<br>  ===
 +
 
 +
Preparation and processing of available wind data for estimating the daily, monthly and seasonal electrical output of the wind farm (calculate a norm year by correlation of measured wind data with long-term meteorological wind speed data). Determine the impact of wind parks on the short-term and long-term scheduling of existing power plants with a view towards minimizing system generation costs. Estimate the savings/benefits attributable to wind park integration such additional capacity available during peak load periods.<br>Correlate monthly diurnal wind speed patterns with monthly load curves based on hourly wind and load data.<br>Depending on the availability and quality of repeated samples of the probability distribution of the wind speed at the selected sites, the study should also perform wind reliability/predictability calculations that can be used to approximate the capacity credit (load carrying capability) of the wind farm.  
  
 
<br>  
 
<br>  
Line 35: Line 39:
 
The resulting wind potential in 50m height is characterised as follows<br>  
 
The resulting wind potential in 50m height is characterised as follows<br>  
  
{| width="100%" cellspacing="1" cellpadding="1" border="1"
+
{| cellspacing="1" cellpadding="1" border="1" width="100%"
 
|-
 
|-
 
| bgcolor="#cccccc" | '''Site'''<br>  
 
| bgcolor="#cccccc" | '''Site'''<br>  

Revision as of 10:06, 9 July 2011

Work in progress

Anhang C_ToR Feasibility Study


Gasch Bewertungsmethoden für Sites (Gasch Kapitel 4)

Site-specific Investigations

Network characteristics at the injection point

Analysis of transformer/feeder/transmission capacities, voltage variations, fault levels and other grid characteristics (including upgrades or reinforcements, if need be) that are relevant for the design and future operation of wind parks at the selected site or, for that matter, the points at which the loads of the wind parks will be injected into the transmission network.

Site conditions

Site-specific examination of ground and soil conditions, accessibility (e.g. roads), availability of ancillary material and equipment (e.g. cranes), environmental hazards, climatic risks, legal constraints (e.g. property rights), licensing/authorization procedures and other factors or obstacles that affect the suitability of the selected site (the partner will bear the cost for soil bearing costs, as well as topographic surveys, if needed).
Site-specific examination of environmental and social aspects. The study shall contain information on national regulations on the requirements of an environmental (and social) impact analysis or, if national regulations are not available, it shall follow international recommendations.


Wind regime

Preparation and processing of available wind data for estimating the daily, monthly and seasonal electrical output of the wind farm (calculate a norm year by correlation of measured wind data with long-term meteorological wind speed data). Determine the impact of wind parks on the short-term and long-term scheduling of existing power plants with a view towards minimizing system generation costs. Estimate the savings/benefits attributable to wind park integration such additional capacity available during peak load periods.
Correlate monthly diurnal wind speed patterns with monthly load curves based on hourly wind and load data.
Depending on the availability and quality of repeated samples of the probability distribution of the wind speed at the selected sites, the study should also perform wind reliability/predictability calculations that can be used to approximate the capacity credit (load carrying capability) of the wind farm.


Evaluation of wind potentials (example from Namibia)

The evaluation of the wind potential in Walvis Bay and Lüderitz was carried out under two different aspects that required also different approaches and methods:
A. Evaluation of daily and annual characteristics in the wind speed distribution and
comparison to the load characteristics in Walvis Bay and Lüderitz

  • statistical analysis of long and short term data
  • daily, seasonal and annual wind speed patterns
  • firm power probabilities for at least certain hours per day.

B. Design of wind park alternatives and calculation of its annual energy yield (various
scenarios).


For these calculations the wind atlas model and the related WASP model and WindPro
sofware program were used. Within these calculations also a sensitivity analysis concerning
a well-suited type of wind turbine for the site in question was undertaken. The wind park
calculations were then based on the identified turbine. The evaluation of the wind potential
was based on measured data from 10 m height, which had been collected intermittently by
MME during the past 2 years.4 In addition, long term meteorological data of the past 20
years as provided by the Namibian Weather Bureau and the South African Weather Bureau
were also considered.

The resulting wind potential in 50m height is characterised as follows

Site

Annual Average

m/s

Energy Density

kWh/m2/a

Weibull Parameters

a,k

Walvis Bay
Saltworks

6.8

3047

A = 7.73

k = 2.17

Lüderitz Golf Course
 7.5

4936

A = 8.4
k = 1.70


Windpotential namibia example.JPG

The annual and daily wind speed patterns are presented in the following graphs:

File:Wind speed pattern namibia example.JPG

Source: GTZ 2000: Wind Energy Projects in Morocco and Namibia; gtz2000-en-wind-energy-projects-marocco-namibia


Portal:Wind