New rules and grid codes to connect generators to the grid are emerging worldwide. In every country or region, the operators responsible for the safety and reliability of the power system have
established different requirements to connect renewable generation systems to transmission and distribution networks.
Such requirements are highly dependent upon the characteristics of individual power systems.
has developed a new verification tool called DIgSILENT GridCode. The software
has been designed in response to the need to verify whether a conventional or
renewable power plant is compliant with local Grid Code interconnection
requirements on basis of generating unit tests. There is a new trend towards verification
of requirements at the point of interconnection of a power plant using transient
stability simulations with numerical models. An increasing number of Transmission System
Operators are including model validation methods to quantify the risk and
uncertainty when using these simulation models in stability studies. These new
methods have been included in the DIgSILENT GridCode tool.
application can be automated and integrated into existing SCADA systems, but
can also run on a workstation as an off-line verification tool. DIgSILENT
GridCode has a new graphical user interface for easy navigation and generates
customisable and automated reports in MS Word© format.
many others, DIgSILENT GridCode compliance verification functions are:
- Low Voltage Ride
Through (LVRT): Verification of generator response during balanced
and unbalanced voltage dips, verification of voltage support requirements
during the dip and after dip clearance, supervision of power plant
non-disconnection and/or supervision of active power recovery according to the user
selected grid code.
- High Voltage Ride
Through (HVRT): Verification of generator response during balanced
and unbalanced voltage swells, verification of voltage support requirements
during the swell and after swell clearance, supervision of power plant
non-disconnection and/or supervision of active and reactive power recovery
according to the user selected grid code.
- Model validation: LVRT or HVRT
simulation results are compared against field measurements according to the
user selected method to check that both data series fit well.
- Power Quality
requirements: Flicker and harmonic levels can be assessed according
to classical International Standards (IEC-61000-4-15, IEC-61000-4-7) or
according to specific methods for renewables (IEC-61400-21, TR3).
DIgSILENT GridCode key features
- Data Viewer
- Phasors Viewer
- Check Grid Code Compliance
- Model Validation
- Flickermeter IEC 61000-4-15
- Harmonics IEC 61000-4-7
- Toolbox IEC 61400-21:
va) – Flicker coefficients
/ Interharmonics /High Frequency Components
distortion at PCC
tools for grid code modifications and data series management:
- Grid Code Editor
- File Cutter
- File Converter / Resampler
- File Merger
New in DIgSILENT GridCode 2.0
Support of new Grid Codes:
- ENTSO-e Network Code
for Requirements for Grid Connection Applicable to ALL GENERATORS (26th
- China GB/T 19963 –
200, State Grid Corporation and China Electric Power Research Institute.
- Germany: EEG:
Renewable Energy Sources Act, measurement procedure by FGW - TR3 for medium and
high voltage networks.
- South Africa: “Grid
Code compliance test for wind energy facility connected to transmission or
distribution grids in South Africa” by Eskom.
- Spain: Update to the
new version 10 of the PVVC to check compliance with P.O.12.3 and P.O.12.2
- United States: Federal
Energy Regulatory Commission: FERC661
New model validation methods:
- IEC-61400-27-1 (CD1
2011.12.23): "Wind turbines – Part 27-1: Electrical simulation models –
- GERMAN FGW - TR4 (Rev.
5 – 2010.03.22): "Technical Guidelines for Power Generating Units - Part
- CHINA CEPRI (June
2012), according to the internal method "Wind Power Grid Interconnection
Research and Evaluation Center"
New in the IEC61400-21 Toolbox for Power
- Harmonic total and individual distortion calculation at the
- New graphical user
interface, easy navigation with new menus and icons
- Event classification:
voltage dips, voltage swells, balanced or unbalanced events.
- Shortcuts for fast
access to configuration parameters.
DIgSILENT GridCode v2.0 Demo Version
The Demo Version of DIgSILENT GridCode v2.0 is a limited
commercial version available for evaluation during a period of 30 days.
The Demo Version will be installed in your computer with the following capabilities:
- Complete visualisation of main menu and execution of independent
Grid Code modules (LVRT analysis, harmonic analysis, flicker...)
- Execution and computation available for predefined input files.
- Possibility of modifying the calculation parameters (rms rate, thresholds, etc.)
- Grid Code editor is fully available; the voltage dip shape
can be modified, active power and reactive power requirements in zones,
etc. The resulting grid code conditions can be checked with the demo
- Editing options as copy/paste graphs, export option to csv format, and other powerful edition capabilities.
South Africa Grid Code Test Example
Spanish Grid Code Test Example
Modell Validation Test (Spanish Code)
German FGW TR4 Model Validation
Australian Grid Code Model Validation
Australian Grid Code Prony Analysis