A Model-Based Design Approach for Stability Assessment, Control Tuning and Verification in Off-Grid Hybrid Power Plants

Lennart Petersen, Florin Iov, German Claudio Tarnowski*

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Resumé

This paper proposes a detailed and practical guidance on applying model-based design (MBD) for voltage and frequency stability assessment, control tuning and verification in off-grid hybrid power plants (HPPs) comprising both grid-forming and grid-feeding inverter units as well as synchronous generation. First, the requirement specifications are defined by means of system, functional and model requirements. Secondly, a modular approach for state-space modelling of the distributed energy resources (DERs) is presented. Flexible merging of subsystems by properly defining in- and output vectors is highlighted to describe the dynamics of the HPP during various operating states. Eigenvalue (EV) and participation factor (PF) analyses demonstrate the necessity of assessing small-signal stability over a wide range of operational scenarios. A sensitivity analysis shows the impact of relevant system parameters on critical EVs and enables to finally design and tune the central HPP controller (HPPC). The rapid control prototyping and control verification stages are accomplished by means of discrete-time domain models being used in both off-line simulation studies and real-time hardware-in-the-loop (RT-HIL) testing. The outcome of this paper is targeted at off-grid HPP operators seeking to achieve a proof-of-concept on stable voltage and frequency regulation. Nonetheless, the overall methodology is applicable to on-grid HPPs, too.
OriginalsprogEngelsk
TidsskriftEnergies
Vol/bind13
Udgave nummer1
Antal sider27
ISSN1996-1073
StatusUdgivet - dec. 2019

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Model-based Design
Power Plant
Tuning
Power plants
Grid
Voltage
State-space Modeling
Hardware-in-the-loop
Requirements Specification
Frequency stability
Domain Model
Discrete-time Model
Prototyping
Inverter
Energy resources
Merging
Voltage control
Sensitivity analysis
Guidance
Sensitivity Analysis

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title = "A Model-Based Design Approach for Stability Assessment, Control Tuning and Verification in Off-Grid Hybrid Power Plants",
abstract = "This paper proposes a detailed and practical guidance on applying model-based design (MBD) for voltage and frequency stability assessment, control tuning and verification in off-grid hybrid power plants (HPPs) comprising both grid-forming and grid-feeding inverter units as well as synchronous generation. First, the requirement specifications are defined by means of system, functional and model requirements. Secondly, a modular approach for state-space modelling of the distributed energy resources (DERs) is presented. Flexible merging of subsystems by properly defining in- and output vectors is highlighted to describe the dynamics of the HPP during various operating states. Eigenvalue (EV) and participation factor (PF) analyses demonstrate the necessity of assessing small-signal stability over a wide range of operational scenarios. A sensitivity analysis shows the impact of relevant system parameters on critical EVs and enables to finally design and tune the central HPP controller (HPPC). The rapid control prototyping and control verification stages are accomplished by means of discrete-time domain models being used in both off-line simulation studies and real-time hardware-in-the-loop (RT-HIL) testing. The outcome of this paper is targeted at off-grid HPP operators seeking to achieve a proof-of-concept on stable voltage and frequency regulation. Nonetheless, the overall methodology is applicable to on-grid HPPs, too.",
keywords = "Hybrid power plant, Off-grid electricity systems, Model-based design, State-space model, Voltage stability, Frequency stability, Small-signal analysis, Control tuning, Controller validation",
author = "Lennart Petersen and Florin Iov and Tarnowski, {German Claudio}",
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A Model-Based Design Approach for Stability Assessment, Control Tuning and Verification in Off-Grid Hybrid Power Plants. / Petersen, Lennart; Iov, Florin; Tarnowski, German Claudio.

I: Energies, Bind 13, Nr. 1, 12.2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - A Model-Based Design Approach for Stability Assessment, Control Tuning and Verification in Off-Grid Hybrid Power Plants

AU - Petersen, Lennart

AU - Iov, Florin

AU - Tarnowski, German Claudio

PY - 2019/12

Y1 - 2019/12

N2 - This paper proposes a detailed and practical guidance on applying model-based design (MBD) for voltage and frequency stability assessment, control tuning and verification in off-grid hybrid power plants (HPPs) comprising both grid-forming and grid-feeding inverter units as well as synchronous generation. First, the requirement specifications are defined by means of system, functional and model requirements. Secondly, a modular approach for state-space modelling of the distributed energy resources (DERs) is presented. Flexible merging of subsystems by properly defining in- and output vectors is highlighted to describe the dynamics of the HPP during various operating states. Eigenvalue (EV) and participation factor (PF) analyses demonstrate the necessity of assessing small-signal stability over a wide range of operational scenarios. A sensitivity analysis shows the impact of relevant system parameters on critical EVs and enables to finally design and tune the central HPP controller (HPPC). The rapid control prototyping and control verification stages are accomplished by means of discrete-time domain models being used in both off-line simulation studies and real-time hardware-in-the-loop (RT-HIL) testing. The outcome of this paper is targeted at off-grid HPP operators seeking to achieve a proof-of-concept on stable voltage and frequency regulation. Nonetheless, the overall methodology is applicable to on-grid HPPs, too.

AB - This paper proposes a detailed and practical guidance on applying model-based design (MBD) for voltage and frequency stability assessment, control tuning and verification in off-grid hybrid power plants (HPPs) comprising both grid-forming and grid-feeding inverter units as well as synchronous generation. First, the requirement specifications are defined by means of system, functional and model requirements. Secondly, a modular approach for state-space modelling of the distributed energy resources (DERs) is presented. Flexible merging of subsystems by properly defining in- and output vectors is highlighted to describe the dynamics of the HPP during various operating states. Eigenvalue (EV) and participation factor (PF) analyses demonstrate the necessity of assessing small-signal stability over a wide range of operational scenarios. A sensitivity analysis shows the impact of relevant system parameters on critical EVs and enables to finally design and tune the central HPP controller (HPPC). The rapid control prototyping and control verification stages are accomplished by means of discrete-time domain models being used in both off-line simulation studies and real-time hardware-in-the-loop (RT-HIL) testing. The outcome of this paper is targeted at off-grid HPP operators seeking to achieve a proof-of-concept on stable voltage and frequency regulation. Nonetheless, the overall methodology is applicable to on-grid HPPs, too.

KW - Hybrid power plant

KW - Off-grid electricity systems

KW - Model-based design

KW - State-space model

KW - Voltage stability

KW - Frequency stability

KW - Small-signal analysis

KW - Control tuning

KW - Controller validation

M3 - Journal article

VL - 13

JO - Energies

JF - Energies

SN - 1996-1073

IS - 1

ER -