1. High Quality Measurement Systems for Wind and Solar Resource Assessment
Vicente Gutiérrez, Business Development Manager of Ammonit Measurement GmbH

2. Ammonit Company Profile
Ammonit Company Profile
German company, based in Berlin
25 years of know-how (founded in 1989)
Projects in more than 100 countries
Measurement equipment for the following activities: Before the construction of a wind or solar power plant
- Wind Resource Assessment
- Solar Resource Assessment
After the construction of a power plant
- Wind Monitoring Systems (SCADA)
- Solar Monitoring Systems
- Power Curve Measurements
Solar Measurement
Wind Measurement 2

3. Ammonit Company Profile
Ammonit Company Profile
Own products with own development
Data loggers  Meteo-40
Online Software for campaign monitoring  AmmonitOR
Complete first class measurement systems Wind sensors from the German company Thies
Solar sensors from the Japanese company EKO
SoDAR devices from Swedish company AQ System
LiDAR devices from UK company ZephIR Lidar
Configuration of cables, cabinets, …  designed and assembled by Ammonit 3

4. Ammonit Product Portfolio
Data Loggers
Anemometers
Wind Vanes
Ultrasonic Anemometer
Barometric Pressure Sensor
Temperature Humidity Sensors
Pyranometers Pyrheliometers Sun Trackers / RSI
Precipitation Sensors
Remote Sensing Systems
Steel Cabinets with Accessories
Power Supply & Communication Systems
Obstacle Lights

5. Ammonit Global Partner Network
Ammonit Global Partner Network
Ammonit cooperates with local partners for:
Assembly of systems (cables, solar supply, ...)
Mast Installation
System Installation
Maintenance of the system
Partner in Vietnam
THINH PHONG LTD COMPANY Ho Chi Minh City
Mr. Le Quoc Bao

6. Short History of Wind Measurement in Vietnam
First Wind Energy Resource Atlas of South East Asia
Wind Resource Atlas of Vietnam MOIT Sponsor: World Bank Consultant: AWS Truepower
High potential along the southern and south-central coasts and in the mountain gaps in central Vietnam
3,000 km coast line!
6.5 to 7m/s in the central-south coast
Results: Standard error 0.8m/s
Local Measurements needed
Source: AWS Truepower

7. Short History of Wind Measurement in Vietnam
2011 – First IEC and MEASNET conform Measurements in Vietnam done by the GIZ, World Bank and Government of Vietnam masts at different sites installed by PECC3
: Different masts in private projects
2016 to 2018 – KfW Bank – German funding project 20 to 40 masts at different sites
2016 to 2018 – World Bank Project 6 to 8 masts (to be installed by PECC3)
Final Vietnam Atlas to be done in 2018

8. Wind measurement – How? Wind Resource Assessment Wind Farm Monitoring
Wind measurement – How?
Wind Resource Assessment Wind Farm Monitoring
Photo by GIZ: Wind site assessment in Northern Chile

9. International Standard for Wind Power Performance Measurement
International Standard for Wind Power Performance Measurement
Standards + Guidelines
IEC „Power Performance Testing” (CD2)
Set-up of a met mast including installation of sensors, sensor quality regarding accuracy and reliability
Criteria for data quantity and quality, as well as reporting
NEW IEC coming soon: Quality criteria for SoDAR / LiDAR devices and ultrasonic anemometer for wind assessment / traceability of measurement data
 Ammonit Measurement Systems
MEASNET „Evaluation of site specific winds”
Process of site assessment incl. data collection, evaluation and interpretation
Focus on data quality, plausibility and integrity incl. data filtering and reporting 9

10. International Standard for Wind Power Performance Measurement
International Standard for Wind Power Performance Measurement
Ammonit Meteo-40 data loggers
Storage of 1-sec. original measurement data acc. to MEASNET Site Assessment guideline
Digitally signed and encrypted measurement data acc. to IEC (CD2) and MEASNET Site Assessment guideline
Configurable data transfer via HTTPS, FTP/SCP, to AmmonitOR or client server acc. to MEASNET Site Assessment guideline
AmmonitOR
Data quality check acc. to MEASNET Site Assessment guideline
Filters to detect measurement errors or sensor defects
Calendar to monitor data integrity
Evaluation and reporting acc. to MEASNET Site Assessment guideline
Display data in customizable plots over certain periods
PDF reports on sensors and statistics
Data archiving 10

11.
Betz Law
Wind speed
Wind energy is proportional to the cube of the wind speed according to Betz’ law: Wind power is P = 1/2 • ρ • A • v³ Δ1% wind speed ≈ Δ 3% wind energy
Measure the wind conditions to calculate the wind energy
A is the area;
ρ is the air density, ρ = p / (R • T), being p the air pressure, T the air temperature and R the gas constant;
v is the wind speed 11

12.
Impact of Measurement Errors on Estimated Annual Energy Production (AEP)
Comparison: the impact of different wind sensors on the assessment
Reduce measurement errors by installing high quality sensors
Even small discrepancies in the evaluation of wind speed data lead to significant deviations in the assessment calculations
Generated Energy Error by 1% Measurement Error
Notes
Anemometer
Δ1% wind speed  Δ3% energy
Most important measurement
Wind vane
No direct relation, but eventually wrong wind park design
Important measurement for wake effect
Barometric pressure sensor
Δ1% pressure  Δ1% energy
Extrapolation of pressure possible once site is known
Temperature Sensor
1°C  0.35%
Humidity Sensor
with 40°C; 1%  0.05% 12

13. International Standard for Wind Power Performance Measurement
International Standard for Wind Power Performance Measurement
IEC-classified measurement instruments
Anemometer classification based on wind tunnel tests performed acc. to IEC :2005
Best anemometer on the market: Thies First Class Advanced
Distributor of Thies sensors  Ammonit
Anemometer
Class A (simple landscape)
Class B (complex landscape)
Thies First Class (2005/2006)
1.5
2.9
Vector L100 (2005/2006)
1.8
4.5
WindSensor / Risø P2546 (2013)
1.32
3.71
NRG Class 1 (2012)
1.01
8.44
Vaisala WAA151 (2005/2006)
1.7
11.1
Thies First Class Advanced (2008)
0.9
3.0 13

14. Why high quality measurement equipment?
Why high quality measurement equipment?
Leverage Effect: Impact of measurement error on profitability
A small error in the energy assessment has a huge impact in the profitability of a project.
P = 1/2 • ρ • A • v³ v P P
$$$$$
wind
measurement
(error)
energy
assessment
(error)
profitability
calculation
(error)
1st leverage effect
2nd leverage effect
1% wind speed error => 3% wind energy error

15. Why high quality measurement equipment?
Why high quality measurement equipment?
Leverage Effect: Impact of measurement error on profitability
 A small error in the energy assessment has a huge impact in the profitability of a project.
P = 1/2 • ρ • A • v³ v P P
$$$$$
wind
measurement
(error)
energy
assessment
(error)
profitability
calculation
(error)
1st leverage effect
2nd leverage effect
1% wind speed error  3% wind energy error
Sensor quality
Total Class B
Energy 100,000 MWh/year
$/KWh
High quality
10.50%
86,560 (P90)
6,924,800 (estimated annual yield)
Low quality
11.70%
85,024 (P90)
6,801,920 (estimated annual yield)
Difference
1.2%
1,536 MWh/year
122,880 $

16.
Mast installation
The proper placement of the mast is crucial for a successful wind measurement campaign
Regulation: IEC :2005
The standard height of approx. 100m
The height of the measuring masts are constantly growing
The mast must have at least 2/3 of the expected height hub
Measurement with remote sensing devices
SoDAR (Sonic Detection and Ranging)
LiDAR (Light Detection and Ranging)
Measurement at hub height in up to 200m
Complementary to met mast 16

17. Different wind profiles
Different wind profiles
Atypical profile: wind speed decreases after 30m
Measuring wind speed at the highest height necessary 17

18. International Standard for Wind Power Performance Measurement
International Standard for Wind Power Performance Measurement
IEC-classified measurement instruments
SoDAR AQ510
ZephIR 300
Successfully tested for IEC-compliance by leading wind consultant DNV GL
A number of verification tests performed by leading wind consultants
According to DNV GL accepted for bankable wind speed and energy assessments in simple terrain
A number of verification tests performed 18

19. Summary for high quality measurement stations
Summary for high quality measurement stations
Data Logger compliant with international norms  Ammonit Meteo-40
High quality sensors  Thies anemometers
High masts (2/3 of the wind turbine, 100m)
Monitoring software compliant with international norms  Ammonit Online Report
Good installation and maintenance team  PECC3, Thinh Phong
Note: Similar to Wind Measurement, there is a big science for Solar Measurements 19

20. Please contact us for further information Ammonit Measurement GmbH
Contact
Please contact us for further information
Cảm ơn!
Ammonit Measurement GmbH
Wrangelstrasse 100 • D Berlin (Germany) T: F: