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The program MODES makes possible to simulate:

  1. transient stability of generators (loss of synchronism)
  2. middle-term dynamics concerned with the primary control of frequency (frequency collapse)
  3. long term stability concerned with the LFC and with OLTC and the overcurrent limiter actions (voltage collapse).
  4. transient phenomena in home consumption of the units (driven start-up, switching over to back-up)
  5. steady state stability - investigation of the power system for a small deviation (oscillations)
screenshot of MODES

The MODES is equipped by a library of prepared models of units (synchronous generators including exciters and prime movers and asynchronous drives), loads, on load tape changers of transformers, load frequency control, automatics, logic a stabilizers Program uses so called global catalogue with the standard sets of parameters for these models. The use can crate own parameters sets located in so called local catalogues.

The basic purpose of the MODES package is to answer question: "What’s happen in the power system if.....?". The simulation calculations and analysis of them results give the answers about dynamic behavior of power system.

The MODES is a software package for transient calculations (dynamic simulation) in electric power system on personal computers. Dynamic simulation consists of the following phases:

  1. Load flow calculation
  2. Reduction of the load flow dataEKVIVAL
  3. Dynamic model setup Dynamic_models
  4. Determination of events, creation of scenarios Action_scenario
  5. Dynamic simulationsSimulation
  6. Short circuit calculationZkraty
  7. Analysis of results

The MODES package contains all necessary tolls to make all tasks mentioned above. It can be used for:

  • Education and study of transients
  • Studies of large power systems interconnection
  • Creation of defense against the system failures spreading
  • Creation of restorations plans after system black outs
  • Checking and optimization of the load frequency and system voltage controls
  • Self-consumption of power plants analysis (motors start-up, back -up and so on)
  • Harmonic analysis of the power system

Design by Pavel Vágner ©, Copyright 2002, All rights reserved