Short description

This small power system was specially designed for testing the ELECTRA control loops and functions in the framework of WP5. It is composed by two generators, (one representing a synchronous conventional group plus one full-converter coupled generator representing a renewable/intermittent generation) and some loads. With this simple design, it is able to reproduce many different grid conditions. The model has been jointly developed by Julia Merino (TECNALIA) and Evangelos Rikos (CRES).

Main technical features

The SRPS-TEC test grid basic model is intended to keep the tradeoff between simplicity and usefulness for testing ELECTRA control loops and functions in WP5. These functions are the basic step for the further implementation of the voltage and balance ELECTRA UCs, such as the adaptive NPFC determination or the PPVC controlling. Due to this, this first mockup model can be used for the validation of the loops/functions, minimizing the inaccuracies related to the modeling/simulation itself. A general overview of the test grid is shown in Figure 1. Conventional (synchronous generator SM-1) and non-conventional generator (Wind turbine WT-1) models have been included. This way, simple adjustments over this base model allow facing different non-dispatchable/dispatchable scenarios as well as diverse percentages of real/virtual inertia. A free connection point has been assigned to N-5 bus for individual testing of different control systems in different devices, named as EUT (Equipment Under Test). A capacitor bank (C-1) has been included to compensate the power factor in the wind power plant terminals. To complete the system, also 3 passive and 1 dynamic load have been included.

Next, the main elements of the grid as well as its name tag in previously shown Figure 1 are detailed:

• 1 Wind turbine (WT-1)
• 1 Synchronous generator (SM-1)
• 1 Capacitor bank (C-1)
• 2 grounding impedances of the generators (Z-1 and Z-2)
• 3 Passive loads (Load-X)
• 1 Asynchronous motor (M-1)
• 3 Overhead lines (OHL-X)
• 3 Transformers (T-X)

In addition to the above described basic model, an extension of it has been devised in order to emphasize the operation of Balance Control use cases. The specific extension is shown in Figure 2. In this diagram all extra to the original model components are highlighted in yellow.

Related documents

•  ELECTRA D5.2 report
•  ELECTRA D5.2 annex
•  SRPS_TECRES.zip

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The model can be used freely for research/educational purposes. 

Reference to ELECTRA IRP must be explicitly done in any published work.