DE102006008178A1 - Solar power plant controlling method for use on roof and facade of building, involves executing comparison measures between fixed reference module and one part of solar module for permanent efficiency control - Google Patents

Abstract

The method involves executing comparison measures between a fixed reference module and one part of a solar module for a permanent efficiency control, which takes place continuously or discontinuously. The reference module is used for testing of performance-enhancing cooling processes and for testing of cleaning agents. The output voltage of the module is measured and the input voltage is subtracted from it, for comparing the performance of individual reference modules.

Description

By economic policy measures like the "100,000 Roofs program "has the use Solar radiation for energy production increased enormously. photovoltaic Acting solar modules can be found in large down-to-earth solar power plants as well as small islands to power individual consumers. However, the most widespread application today is assembly and on buildings and the feed into the grid.

Around It must work optimally to operate a system economically. For solar modules there are several variables which all affect the result influence such as the radiation intensity, the temperature, the pollution, the harvest factor of the solar cells, the efficiency of the inverter, shading losses, etc .. Also damage due to weather conditions and temperature changes up to hail and lightning are possible. today Built-up systems are connected to the grid after their technical acceptance connected and from time to time by inspection for obvious damage checked. Creeping changes, which are always deteriorations are not recognized.

task The invention is to show a method and a device which make it possible the quality and continuously monitor the performance of solar systems.

According to the invention Task solved by that to permanent performance control, continuous or discontinuous can be done, the electrical power of at least some, preferably all, to a solar system interconnected solar modules continuously measured and compared with each other.

The Voltage measurement is the simplest and preferred comparison measurement. For this purpose, the output voltage of the module is measured and the input voltage subtracted from it. This method is suitable for parallel and series connection. The measuring and or comparison cycle may be continuous or discontinuous. Except the electrical voltage or current or power measurement can additionally the temperature of the cells and / or their surroundings are measured. Depending on the type of performed Measurement may be necessary that the modules for the duration the measurement of the prior art electrically enabled are.

Becomes a solar system with an additional Reference solar module, but preferably not exclusively same specific characteristics as the modules of the plant possesses and preferably in their immediate vicinity under the same or near same conditions as this solar irradiated, equipped, can the modules in total, as groups, or individually with the reference module and or compared with each other.

At Place an additional Reference module can also be at least one module of the system electrically be switched so that it serve as a reference and can be compared with this. It is preferred however, the periodic individual measurement of the solar modules and the comparison their readings.

Become the measured values can be recorded by their graphical representation of the condition The solar system can be easily detected and documented. The Times of measurements can as well like the mathematical treatment and storage of the measured values by means of Programmable controller triggered and managed.

To step Deviations between the measured values this is an indication that the installation needs review. It must be distinguished whether it is environmental disturbances such as shading effects through clouds, trees or real estate, or irreversible mechanical or electrical Damage.

It is an advantage if the reference module is easily accessible, because it is then easily inspected and cleaned, for example can be tempered. The optimal amount, type and application of detergents can be determined on the reference module before the whole plant with it is treated.

By Thermal manipulations of the reference module can be relatively easy be found out which performance-enhancing cooling method most effective and economical before any conversion or the complement the plant is made.

Claims (7)

Process for the control of solar power systems mounted on roofs or facades for the conversion of solar radiation into electrical energy, characterized in that for continuous power control, which can be continuous or discontinuous, comparison measurements between at least a portion of the solar modules are performed. Method for controlling solar power systems mounted on roofs or facades for converting solar radiation into electrical energy, since characterized in that for permanent performance control, which can be continuous or discontinuous, comparative measurements between at least one fixed reference module and at least a portion of the solar modules are performed. Method according to claim 1 or 2, characterized that to Compare the performance of individual modules or module groups Output voltage is measured and subtracted from the input voltage becomes. Method according to one of the preceding claims, characterized characterized in that instead the voltage of the current or current and voltage measured together becomes. Method according to one of the preceding claims, characterized characterized in that Reference module for testing performance-enhancing cooling processes is used. Method according to one of the preceding claims, characterized characterized in that Reference module is used for the testing of cleaning agents. Method according to one of the preceding claims, characterized characterized in that readings be plotted graphically.