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Registered Member #14
Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
The project is in its final stage (calibration and software debugging). It consist in two pic16f876a microcontrollers, two LCD display a TLP434-RLP434 radio transmitter-receiver pair and various opamps and comparators. The tower side board acquires alternator voltage, alternator current (now using a copper strip for shunt ,next using a constantan wire 1mOhms shunt), battery voltage, alternator phase frequency (RPM calculation) and anemometer (counting the impulses from an optical sensor interrupted by the rotation of the anemometer shaft). Through calculation it determines TSR, rotor torque, power, integrates the power to get energy in KWh and wind statistics. It also sends on-air a packet composed by the five basic parameters (voltages etc), the remote-side-board receives it and performs the same calculation separately from the tower-side board, displaying the same information. Both circuits are operated by a single button interface (short press cycles through modes, long press resets the statistics). The tower side operates also without LCD display, the remote side obviously not, since it purpose is to show the contents of the packet
Registered Member #14
Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
UPDATE: The project it's finished and it is installed on-site. Waiting for wind to calibrate my anemometer.
Final Features:
-Real time monitoring of alternator Voltage ( xx.xx V), alternator Current ( xx.xx A), Alternator Rotation speed (RPM), wind speed (m/s) and derived data (Alternator Power, TSR, Torque) -Backup Battery control and charging display -Wind statistics (Absolute average, wind average, wind maximum), and power counter (KWh xxxx.xxxxxx) -Possilibity of tuning the system to change voltage/current ranges, rotor diameter, anemometer calibration, alternator poles (RPM calculation) -Packet broadcaster (symple cryttoigraphy) with the acquired data (one every 0.5s) -1-button interface for changing page, resetting and adjusting parameters
Features of the receiver: -Shows the same data of the transmitter, logs power produced and statistics indipendently from the transmitter, two RPM and Wind led alarms, 1-button interface
The station turns automatically when over 150 RPM (cut-in of the turbine)
Registered Member #14
Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
THe box is weater-rated (for external areas). The lcd has a silicon gasket and a polystirene window, so the water will not get in. In these days it is raining but no water gets inside
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Wind generator monitoring board(s)
