Technical and Financial Assessment of Frequency Control for DERs Through Dynamic Simulations in OpenDSS

Authors

  • Vinicius C. Cunha ERA Energy Research and Analytics, Campinas, SP
  • Tiago R. Ricciardi ERA Energy Research and Analytics, Campinas, SP
  • Augusto Janssen Universidade Estadual de Campinas, Campinas, SP
  • Fernanda C. L. Trindade Universidade Estadual de Campinas, Campinas, SP
  • Walmir Freitas Universidade Estadual de Campinas, Campinas, SP
  • Heliton O. Vilibor CPFL Energia, Campinas, SP
  • Victor B. Riboldi CPFL Energia, Campinas, SP

Keywords:

Distributed Generation, Distribution Systems, Dynamic Simulation, Financial Assessment, Watt-Hz Curves

Abstract

The Brazilian Independent System Operator oriented that frequency control will be soon requested from all distributed generators (DGs). In this context, this work proposes an approach to calculate the technical and financial impacts from the adoption of Watt-Hz curves in DGs for monthly simulations. This approach combines quasi-static time series (QSTS) simulations with dynamic simulations based on events that trigger the action of the frequency control. A real transmission and distribution (T&D) system comprising high voltage (HV) subtransmission lines, medium voltage (MV) distribution feeders, and low voltage (LV) circuits altogether (72,240 nodes), is used as a test system. The DGs considered in this work are synchronous generators. Three different models (2nd-, 4th-, and 6th-order machine models) are implemented as user-written models in AltDSS through Python (DSS Extensions project). Overall, the results show that the technical and financial impacts tend to be minimal for both perspectives: DG owners (energy curtailment) and utilities (steady-state voltage transgressions and technical losses).

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Published

2024-10-18

Issue

Vol. 4 No. 1 (2024): CBA2024

Section

Articles