Measurements on photovoltaic and solar absorber systems

The solar plant is equipped with a comprehensive measuring technology, which allows a better insight into solar technology. The measured values are divided into three categories:

The electrical values provide information about the yield of the system and allow a comparison of the fixed and the tracked modules. For this purpose, the voltage as well as the currents and power of the fixed and the tracked level are measured.

Connection boxes on the roof

The meteorological parameters show the dependence of the yield on weather influences such as sunshine, wind and temperature.

The system parameters, these are mainly the temperatures in the terminal boxes and the transistors of the inverter and some digital state variables. These serve to ensure the fault-free operation of the plant.

The measured values are recorded by suitable sensors and, if necessary, further processed by measuring amplifiers from Mescontec and WSE. The standardized 20 mA signals are then digitized by A/D converters from IMKO and fed to the data acquisition computer via a universal two-wire bus system (IMP232). All measured values are recorded and stored by the institute's own program MESSOLAR. Afterwards they can be evaluated with the evaluation program ANALYMES, which was also developed at ETP, in order to obtain information about the operation of the plant.

The meteorological tree