The Dewesoft power analyzer allows a comprehensive analysis of renewable generation units according to FGW-TR3, VDE-AR4105, BDEW standards. Highly flexible hardware and innovative software save a lot of time during the testing process.

The Dewesoft power analyzer allows a comprehensive analysis of renewable generation units according to FGW-TR3, VDE-AR4105, BDEW standards. Highly flexible hardware and innovative software save a lot of time during the testing process.
Renewable power plants like wind, photovoltaic (PV) and CHP (Combined Heat and Power Plant) are more and more popular and the amount of already installed units is huge. For the operation at the public grid these renewable power generation units have to fulfill a couple of requirements to contribute to a stable operation of the grid.
The standards, which define the conditions for operating the plant at the grid, vary from country to country: e.g. FGW-TR3, VDE-AR4105, BDEW etc. These regulations define the control of the active and reactive power, the limits of Power Quality emissions and the behavior at grid disturbances.
Testing according to these regulations requires a couple of different test procedures and different test equipment (Scope, Power Analyzer, Data Logger, Analysis software and mathematical operations). The Dewesoft solution allows wide range analysis according to these standards with a single instrument.
Special factors like flicker step factor, voltage change factor, symmetrical components, period values for P, Q, S, U, I (for half-wave or full-wave) etc. are calculated in the software. The recorder allows creating all necessary graphs with the different parameters (e.g. P-f chart).
The data logging capability allows storing the raw data for analyzing the switching processes or the behavior at faults (Waveform analysis). The Math library can calculate any statistical parameter (e.g. max. active power for 0.2s, the 60s and 600s) and also offers the possibility to automatically check if the power generation unit meets the requirements.
Max. active power for 0.2s, 60s and 600s
Input and output power (DC, AC)
Calculation of deviation, min, max, averaged values for each setpoint
Automatic check if within range
Transient Behaviour
Different charts (P, Q, S, U, I, f, cos phi)
Check if power reduction within tolerance
Calculation of gradients (%/Hz) and power difference (ΔP)
Different charts (P, U, I, f)
Q_ind, Q_cap, Power Factor
The voltage of positive sequence-system
Flicker coefficient (c) at different phase angles (30,50,70,85) according to IEC 61400-21
DC input power, reactive output power
Period values of P, Q, S, Urms, Irms (with overlap)
Flicker step factor (kf) and voltage change factor (ku) at different phase angles (30,50,70,85) according to IEC 61400-21
Calculation up to 50th order for U, I, P, Q, Z and phi
Full and half-sidebands
Harmonic smoothing filter
Higher Frequencies from 2 to 9 kHz in 200Hz bands (possible up to 150 kHz)
Test of protection equipment – Check Settings, and dis- and reconnection time for over- and under-voltage, over- and under-frequency
Raw data analysis (waveform) at start and end of the fault
Analysis of fault length and specification of short-circuit current (peak value, 1⁄2 period value) at different times (t=0, t=150ms, etc.)
Calculation of normalized active- reactive-
and apparent power
Half-wave RMS values for voltages & currents
Positive-, negative and zero-sequence voltages
Active-, reactive- and apparent power of positive-, negative- and zero-sequence-system
We recommend R3 DAQ system as a typical configuration for renewable energy measurements configured with:
Compact, mobile, and portable data acquisition systems that feature a built-in data logger, powerful data processing computer, multi-touch display, and internal batteries for maximum portability.
High channel count data acquisition system with built-in data logger and powerful data processing computer, touch screen display (R8D) and internal batteries (R8B, R8DB) for maximum portability.
High-accuracy current sensors for AC/DC current measurement and power analysis. From current clamps to high-precision zero flux current transducers and Rogowsky coils.
Our current transducers are a perfect fit for our data acquisition systems and can precisely measure AC/DC current with up to 0.03% accuracy. TEDS equipped for automatic detection and setup.
DewesoftX is an award-winning data acquisition software for test & measurement and monitoring. Experience data recording, signal processing, and data visualization like never before.
DewesoftX DAQ software received multiple international awards, is innovative and easy-to-use, but at the same time very deep in functionality. Our mission is clear - one software for all test and measurement applications.
The Dewesoft Power Analyzer is not only the smallest power analyzer in the world, but it’s also the most powerful one. The flexible hardware platform combined with powerful software features gives unique testing possibilities for any kind of electrical measurement.
Dewesoft power analyzers can accurately measure direct high-voltage and current signals but do not stop there. They can also measure vibration, temperature, GPS/GNSS, CAN bus, video, and many other data fully synchronized.