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Manual Power Solutions Manual

Renewable Energy Testing Solutions

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.

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Renewable Energy Testing Solutions from Dewesoft

Testing System Overview

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 System Overview

One System. All the Measurements.

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. 

One System. All the Measurements.

Active & Reactive Power

Active Power calculation

  • Max. active power for 0.2s, 60s and 600s

  • Input and output power (DC, AC)
     

Operation at different set point settings for active and reactive power

  • 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)
     

Power reduction at increasing frequency

  • Check if power reduction within tolerance

  • Calculation of gradients (%/Hz) and power difference (ΔP)

  • Different charts (P, U, I, f)
     

Evaluation of reactive power provision

  • Q_ind, Q_cap, Power Factor

  • The voltage of positive sequence-system

Active & Reactive Power

Power Quality

Flicker

  • Flicker coefficient (c) at different phase angles (30,50,70,85) according to IEC 61400-21

  • DC input power, reactive output power

Switching Operations

  • 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

Harmonics, Interharmonics and THD

  • Calculation up to 50th order for U, I, P, Q, Z and phi

  • Full and half-sidebands

  • Harmonic smoothing filter

Higher Frequencies

  • Higher Frequencies from 2 to 9 kHz in 200Hz bands (possible up to 150 kHz)

Power Quality

Behavior at Faults

Dis- and Reconnection tests

  • Test of protection equipment – Check Settings, and dis- and reconnection time for over- and under-voltage, over- and under-frequency


Behavior at grid disturbances (LVRT - Low Voltage Ride Through)

  • 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

Behavior at Faults

Typical DAQ Configuration

We recommend R3 DAQ system as a typical configuration for renewable energy measurements configured with:

  • 6x high-voltage analog inputs
  • 6x current analog inputs
  • 1x low-voltage analog input for setpoint value
Typical DAQ Configuration

Applies to Products

View product R2DB

R2DB

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.

View product R8

R8

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.

View product Current Sensors

Current Sensors

High-accuracy 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.

View product DewesoftX

DewesoftX

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.

View product Power Analyzer

Power Analyzer

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.

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