Abstract
The hardware under test (HUT) in a power hardware in the loop (PHIL) implementation can have a significant effect on overall system stability. In some cases, the system under investigation will be unstable unless the HUT is already connected and operating. Accordingly, initialization of the real-time simulation can be difficult, and may lead to abnormal parameters of frequency and voltage. Therefore, a method to initialize the simulation appropriately without the HUT is proposed in this contribution. Once the initialization is accomplished a synchronization process is also proposed. The synchronization process depends on the selected method for initialization and therefore both methods need to be compatible. In this contribution, a recommended practice for the initialization of PHIL simulations for synchronous power systems is presented. Experimental validation of the proposed method for a Great Britain network case study demonstrates the effectiveness of the approach.
Highlights
IntroductionPower systems are evolving into a more variable and difficult to predict system with a mix of novel and complex components, such as renewable energy sources or power electronics components, and conventional components with well-known behavior
Electrical power systems are under continuous development, accelerated by regulations enforced to mitigate climate change, the need to enhance efficiency and the substantial technology evolution.Power systems are evolving into a more variable and difficult to predict system with a mix of novel and complex components, such as renewable energy sources or power electronics components, and conventional components with well-known behavior
The different components of the PHIL setup used for the validation of the proposed proposed initialization and synchronization process are described
Summary
Power systems are evolving into a more variable and difficult to predict system with a mix of novel and complex components, such as renewable energy sources or power electronics components, and conventional components with well-known behavior. The interaction between such components is an important area of research to achieve a resilient and secure power system. For the assessment of novel complex components, the interactions between modern and legacy power system components and the validation of novel control algorithms for future power systems, hardware-in-the-loop (HIL) techniques are proving to be a useful approach [1]. PHIL has been utilized in a range of applications including: (i) where a component (such as PV inverter) is physically available and it is computationally more efficient to utilize the component within a PHIL setup rather than developing a Energies 2018, 11, 1087; doi:10.3390/en11051087 www.mdpi.com/journal/energies
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