MHK ISDB/Tests/Power Performance/Tidal Stream Energy Converters

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Power Performance: Tidal Stream Energy Converters

Purpose

To measure the TEC’s power performance (measure of the capability of a TEC to produce electric power and energy for specific currents) tidal flows in order to provide data to calculate the power curve and estimate annual energy production.


Overview for Open Ocean Testing

The power curve should be determined by simultaneous measurements of the current, the power output from the TEC at the test site and external factors such as current, turbulence, wind, waves, water depth, operating depth and mooring line tensions (if applicable). TEC power should be reported via a normalized power matrix that is constructed using the “method of bins.” Power measurements should be binned by water velocity into bins that are 0.1 m/s in width. The measurement/averaging period should be 10 min for each data set. For wind, IEC 61400-12-1 recommends that at least 30 min of data be collected for each bin which should include at least three independent and valid data sets to allow a basic level of statistical analysis. If a TEC is connected to the grid, the grid needs to be monitored for export capacity that might constrain the TEC output capacity.



Measurements

Tension (Mooring Line) search
AC Power (Power) search
DC Power (Power) search
AC Power Factor (Power) search
AC Voltage (Voltage) search
DC Voltage (Voltage) search
Heading (Orientation) search
Roll and Pitch (Orientation) search
Altitude (Position) search
Bathymetry (Position) search
Depth (Position) search
Geodetic Position (Position) search
Underwater Position (Position) search