• PSI SASO DSO 2.0 - Data exchange with investment protection

    Benefit from PSI's future-proof solution!

The data exchange between transmission and distribution system operators is more important than ever!

The focus: Increasing the supply security

The reason for developing a system for Security Analysis and System Optimization (PSIsaso/ DSO 2.0) were the European network regulations which require the cooperation between Distribution System Operators (DSO), plant operators, and Transmission System Operators (TSO) in the European electricity network. In particular, the regulations include CACM, GLDPM, FCA VO, and SO-GL.

The DSOs must inform generation plant operators about pending infeed management measures.This enables the DSO to set up look-ahead models of their networks and to provide them to the TSO.

PSI is a competent partner at your side to meet the data exchange requirements.

We have developed a future-proof solution to meet these requirements. As a DSO, you can also significantly benefit from these.

PSsaso/DSO 2.0 protects your investment in the future

Our system for Security Analysis and System Optimization PSIsaso consists of the two basic functionalities basic module and PCOM+ as well as the application modules GLDPM for the data exchange process specified in Germany, Network State Forecast for look-ahead network operations, and Redispatch for the realization of Redispatch 2.0.


Our future-proof solution

For the realization of the associated requirements, it is necessary to expand existing control systems and to add new components. For this purpose, PSI has developed PSIsaso/DSO 2.0 which provides you with a modular, expandable, and therefore future-proof solution.

Auto-pilot for your network

"SASO" basic module

Autonomous, control system independent

Communication center & time series management

"PCOM+" module

Autonomous, control system independent


"GLDPM" module

Expansion module for your existing PSIcontrol



"Network State
Forecast" module

for the calclulation
of the future
network state

Data exchange
between DSO
and TSO


based on the basic module

Optimal multi-criteria decision support

"Decision Support"

Control system independent

PSIsaso basic module

The DSOs must inform generation plant operators about pending infeed management measures.This enables the DSO to set up look-ahead models of their networks and to provide them to the TSO. The range of functions include: 

  • Value substitution strategy
  • Snapshot network data model in binary NA data model
  • Import of infeed and load forecasts
  • Import of conventional infeed schedules (KWEP data)
  • Import of reported EE infeeds (DCI schedules)
  • Import of weather forecasts, for example for overhead line monitoring (OLM)
  • Consideration of scheduled switching measures
  • Consideration of overhead line monitoring using the weather forecasts. The data model is transferred via the binary NA data model
  • Entry and editing of temporary equipment for defined validity time periods
  • Import of the boundary set to eliminate the upstream network if it is included in the modeled network (boundary equipment profile)
  • Editing of switching states for defined validity time periods
  • Load and infeed data from subordinate network areas which themselves cannot be calculated, are aggregated on the higher level. Only in connection with the binary NA data model

Your benefits

  • Seamless handling of various file formats

  • Basis for additional network security applications


  • Visualization of future states in network diagrams and station diagrams
  • Contingency analysis
  • Short circuit calculation
  • Switching measures
  • Infeed management measures
  • Determination of the reactive power potential
  • Network loss forecast
  • Overhead line monitoring based on weather forecasts


PCOM+ module

PCOM+ is used for exchange and archiving of time series. This module makes the forecast data which are processed in the SASO module available for documentation purposes or other uses (such as look-ahead network monitoring with day-ahead or 2-day-ahead time horizon) in your network control system. It includes following features:

  • Energy data manager for the selection of time series by filtering the time series archive
  • Display with tabular representation of time series and manual intervention (editor)
  • Master data and relationship management, maintenance interface for managing network elements
  • Communication server for parameterization of data input and transmission
  • Communication archive for documentation of external data transfers
  • Interface for validation and substitute value parameterization
  • Tool for interface monitoring on physical, logical and functional level
  • Authorization assignment for administrators
  • Creation of direct database accesses via optional SQL interface

Your benefits

  • Overview of all communication processes
  • Expansion option for data exchange and time series management processes


GLDPM module

Capacity calculation based on a standardized procedure for the electricity traded on the day-ahead and intra-day markets requires data exchange across networks. This is achieved with the following features:

  • Generation of a network dataset based on the GLDPM process for the TSO
  • Verification of the forecast data model using the load flow calculation
  • Active reduction of the imported distribution network data model

Your benefits

  • Compliance with GLDPM requirements
  • Use of acquired data across multiple modules for stability calculation of the own network


    Network State Forecast module

    For a realistic forecast of the future state of the distribution networks, it is important to know the state of the transmission networks.This objective is achieved with the following functions:

    • Generation and verification future network states using time series in PCOM+    
    • Import of the forecast TSO network models and linking to own network
    • Import of the forecast network models of adjacent DSO and linking to the own network
    • Cascading of the CY (if available in NCS)
    • Congestion detection: Forecast of the network states and its verification with regard to limit violations
    • Resolution of current congestions by topological switching measures
    • Setup of the reactive power flow required by the TSO
    • Infeed management controller:  Resolution or reduction of current congestions by reduc-ing decentralized infeeds
    • Determination of the greatest possible reactive power exchange at the transfer points of a reactive power cluster to the upstream TSO
    • CGMES Viewer:  In the simulation mode of PSIsaso, a network diagram with the data for the currently loaded simulation copy is displayed
    • Station diagrams are generated from the topology
    • Simulation of a forecast point in time. The Study mode is started in PSIsaso and can be used via JFE
    • The study mode is started in the NCS. For this purpose, the input data model of the network state forecast for this point in time is transferred to the operator workstation in the NCS.

    Your benefits

    • Improved look-ahead network operation
    • Preventive detection of critical network states


      Redispatch module

      The Redispatch module provides continuous exchange of information related to the dispatch process between the network operators. For this process of mutual coordination of measures between network operators, the following functions are available:

      • Sizing of measures:  Merit order resolution of the congestions in the order of the severity of the violations
      • Declustering via PCOM+:  Stating as linear optimization problem and determination of the overall optimized state
      • Integration of downstream network operators (Import of flexibility potentials, Base-Line, sensitivities, flexibility limitations - Export: Scheduled and committed demands)
      • Clustering: Static via the user interface of parameterized clusters, via the secondary substation lists in PCOM+
      • Clustering: Dynamically based on clusters determined by fixed rules
      • Determination and export of the flexibility limitations of the own network
      • Scaling of the forecast infeed power based on non-availability which are imported into the system as time series
      • Ad-hoc demands: Short-term demands transmitted by the network operator are processed spontaneously by including them directly in the sizing of measures.
      • Request case: Export of the demands to the operations manager
      • Tolerance case: Export of the demands to the NCS
      • Provision report and time series for balance compensation
      • Import of the market-based adaptation and consideration in the schedules of the respective controllable resources
      • Authorization process: Authorization of measures incl. partial authorizations
      • Disabling of measures: Individual measures can be disabled in order to prevent sending commands.
      • Export of the standard switching operations for topological measures

      Your benefits

      • Network operational parts of Redispatch 2.0 are supported
      • Determination of redispatch demands and forwarding to your system


        Module Decision Support

        With the increase of the decentralized energy generation, the importance of the usually static disconnection points in the network also increases. The "Decision support" module realizes dynamic optimization of the disconnection points which allows significantly better utilization of the entire medium and low voltage network while complying with the specified voltage bands. The objective of this optimization is to avoid additional network expansion measures.

        The "Decision support" module also provides support for network security. Intelligent energy networks require intelligent security applications for configuration of the field components as well as the management of the control center and the exchange of the required data. Even security experts cannot easily detect slowly injected manipulations of the network. The AI algorithm developed by PSI FLS for pattern recognition detects irregularities which may appear irrelevant to human observers and which have no apparent effect on your current network status.

        Your benefits

        • Reduced network expansion cost

        • Increased network security


        Do you have questions about PSIsaso DSO 2.0 and intelligent solutions for distribution system operators?

        Please contact us!

        Contact Person

        Dr. Guido Remmers
        Manager Division DSO

        +49 6021 366-337

        Source titel graphic: 3dkombinat | Adobe Stock