Design for the energy revolution
solar panels or poor electrical connections (Figure 2). Sensor modules are multiplexed through multichannel communications modules to a coordinating controller. In Figure 2, voltage and current sensors monitor twenty PV string currents and the common voltage using only two communications modules. Communications modules send the data to a compact controller via a Modbus interface.
The Phoenix Contact 1183803 rotor blade load sensor mounted near the blade's interior base uses strain gages to monitor turbine blade loading. Combined with data from other sensors, the measurement- evaluation controller monitors the blade load, permitting the turbine to be controlled to optimize performance with minimal blade loading.
Photovoltaic power generation Solar power generation requires system-wide monitoring to ensure that solar panels in the field are operating with peak efficiency. Solar cells are connected in series, described as a photovoltaic (PV) string, to achieve a prescribed voltage. Monitoring current and voltage in the individual strings of panels allows users to pinpoint power losses due to damaged
Figure 2: Monitoring PV string current and voltage in the individual strings of panels allows users to pinpoint power losses due to damaged solar panels or poor electrical connections. (Image source: Phoenix Contact)
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