This book deals exclusively with the power-flow modelling of HVDC transmission systems. Different types of HVDC transmission systems, their configurations/connections and control techniques are covered in detail. Power-Flow modelling of both LCC- and VSC-based HVDC systems is covered in this book. Both the unified and the sequential power-flow methods are addressed. DC grid power-flow controllers and renewable energy resources like offshore wind farms (OWFs) are also incorporated into the power-flow models of VSC-HVDC systems. The effects of the different power-flow methods and HVDC control strategies on the power-flow convergence are detailed along with their implementation.
Features:
- Introduces the power-flow concept and develops the power-flow models of integrated AC/DC systems.
- Different types of converter control are modelled into the integrated AC/DC power-flow models developed.
- Both unified and the sequential power-flow methods are addressed.
- DC grid power-flow controllers like the IDCPFC and renewable energy resources like offshore wind farms (OWFs) are introduced and subsequently modelled into the power-flow algorithms.
- Integrated AC/DC power-flow models developed are validated by implementation in the IEEE 300-bus and European 1354-bus test networks incorporating different HVDC grids.
This book aims at researchers and graduate students in Electrical Engineering, Power Systems, and HVDC Transmission.
Author(s): Shagufta Khan, Suman Bhowmick
Publisher: CRC Press
Year: 2022
Language: English
Pages: 290
City: Boca Raton
Cover
Half Title
Title Page
Copyright Page
Table of Contents
Preface
Authors
List of Abbreviations
List of Symbols
Chapter 1 HVDC Transmission Systems
1.1 Introduction
1.1.1 Line Commutated Converter (LCC)-Based HVDC Transmission
1.1.2 Voltage Source Converter (VSC)-Based HVDC Transmission
1.2 Interconnection of HVDC Systems
1.2.1 Back-to-Back (BTB) HVDC
1.2.2 Point-to-Point (PTP) HVDC
1.2.3 Multi-Terminal HVDC
1.3 Control of HVDC Systems
1.3.1 DC Master-Slave Control
1.3.2 DC Voltage Droop Control
1.4 Introduction to DC Power-Flow Controllers
1.5 Integration of Renewable Energy Sources (RES) to HVDC Grid
1.6 Introduction to the Power-Flow Problem and the Newton-Raphson Method
1.7 Introduction to the Power-Flow Modelling of LCC-based Integrated AC–DC Systems
1.7.1 The unified Method
1.7.2 The sequential Method
1.8 Introduction to the Power-Flow Modelling of VSC-based integrated AC–DC Systems
1.9 Organization of the Book
Chapter 2 Power-Flow Modelling of AC Power Systems Integrated with LCC-Based Multi-Terminal DC (AC-MLDC) Grids
2.1 Introduction
2.2 Modelling of Integrated AC-MLDC Systems
2.3 Control Strategies for MLDC Grids
2.4 Power-Flow Equations of Integrated AC-MLDC Systems
2.5 Implementation of Power-Flow in Integrated AC-MLDC Systems
2.6 Case Studies and Results
2.6.1 Studies with Unified Power-Flow Model of IEEE 300-Bus Test System Integrated with 3-Terminal LCC-HVDC Grid
2.6.2 Studies with Unified Power-Flow Model of European 1354-Bus Test System Integrated with 12-Terminal LCC-HVDC Grid
2.6.3 Studies with Sequential Power-Flow Model of IEEE 300-Bus Test System Integrated with 3-Terminal LCC-HVDC Grid
2.6.4 Studies with Sequential Power-Flow Model of European 1354-Bus Test System Integrated with 12-Terminal LCC-HVDC Grid
2.7 Summary
Chapter 3 Power-Flow Modelling of AC Power Systems Integrated with VSC-Based Multi-Terminal DC (AC-MVDC) Grids Employing DC Slack-Bus Control
3.1 Introduction
3.2 Modelling of Integrated AC-MVDC Systems Employing DC Slack-Bus Control
3.2.1 Modelling of Integrated AC-MVDC Systems in the PTP Configuration
3.2.2 Power-Flow Equations of Integrated AC-MVDC System in the PTP Configuration
3.2.3 Modelling of Integrated AC-MVDC Systems in the BTB Configuration
3.2.4 Power-Flow Equations of Integrated AC-MVDC Systems in the BTB Configuration
3.3 Implementation of Power-Flow in Integrated AC-MVDC Systems
3.3.1 Unified AC–DC Power-Flow Method
3.3.1.1 Unified AC–DC Power-Flow Method for PTP Configuration
3.3.1.2 Unified AC–DC Power-Flow Method for BTB Configuration
3.3.2 Sequential AC–DC Power-Flow Method
3.3.2.1 Sequential AC–DC Power-Flow Method for PTP Configuration
3.3.2.2 Sequential AC–DC Power-Flow Method for BTB Configuration
3.4 Case Studies and Results
3.4.1 Studies with Unified Power-Flow Model of IEEE 300-Bus Test System Integrated with VSC-based multi-terminal DC (MVDC) Grids
3.4.2 Studies with Unified Power-Flow Model of European 1354-Bus Test System Integrated with VSC-based multi-terminal DC Grids
3.4.3 Studies with Sequential Power-Flow Model of IEEE 300-Bus Test System Integrated with MVDC Grids
3.4.4 Studies with Sequential Power-Flow Model of European 1354-Bus Test System Integrated with MVDC Grids
3.5 Summary
Chapter 4 Power-Flow Modelling of AC Power Systems Integrated with VSC-Based Multi-Terminal DC (AC-MVDC) Grids Employing DC Voltage Droop Control
4.1 Introduction
4.2 Modelling of Integrated AC-MVDC Systems Employing DC Voltage Droop Control
4.3 Power-Flow Equations of Integrated AC-MVDC Systems Employing DC Voltage Droop Control
4.4 DC Voltage Droop Control in MVDC Systems
4.5 Modelling of AC-MVDC Systems with DC Voltage Droop Control
4.6 Case Studies and Results
4.6.1 Studies of 5-Terminal VSC-HVDC Network Incorporated in the IEEE 300 Bus System (Model A)
4.6.2 Studies of 7-Terminal VSC-HVDC Network Incorporated in the European 1354 Bus System (Model A)
4.6.3 Studies with Unified Power-Flow Model of IEEE 300-Bus Test System Integrated with 5-Terminal MVDC Grid (Model B)
4.6.4 Studies with Unified Power-Flow Model of European 1354-Bus Test System Integrated with 7-Terminal MVDC Grid (Model B)
4.6.5 Studies with Sequential Power-Flow Model of IEEE 300-Bus Test System Integrated with 5-Terminal MVDC Grid (Model B)
4.6.6 Studies with Sequential Power-Flow Model of European 1354-Bus Test System Integrated with 7-Terminal MVDC Grid
4.7 Summary
Chapter 5 Power-Flow Modelling of AC Power Systems Integrated
with VSC-Based Multi-Terminal DC (AC-MVDC) Grids
Incorporating Interline DC Power-Flow Controller (IDCPFC)
5.1 Introduction
5.2 Modelling of AC-MVDC Systems Incorporating IDCPFCs
5.3 Power-Flow Equations of Integrated AC-MVDC Systems Incorporating IDCPFC
5.4 Implementation of Power-Flow in Integrated AC-MVDC Systems Incorporating IDCPFC
5.5 Case Studies and Results
5.5.1 Study of 3-Terminal VSC-HVDC Network Incorporating IDCPFC in IEEE 300 Bus System
5.5.2 Study of 7-Terminal VSC-HVDC Network Incorporating IDCPFC in European Bus System
5.6 Summary
Chapter 6 Power-Flow Modelling of AC Power Systems Integrated with VSC-Based Multi-Terminal DC (AC-MVDC) Grids Incorporating Renewable Energy Sources
6.1 Introduction
6.2 Modelling of AC-MVDC Systems Incorporating Renewable Energy Sources
6.3 Power-Flow Equations of Integrated AC-MVDC Systems with Renewable Energy Sources
6.4 Modelling of Integrated AC-MVDC Systems with Renewable Energy Sources Employing DC Slack-Bus Control
6.5 Modelling of AC-MVDC Systems with Renewable Energy Sources Employing DC Voltage Droop Control
6.5.1 Types of DC Voltage Droop Control
6.5.2 Implementation of DC Voltage Droop Control in Integrated AC-MVDC Systems Interfaced with Offshore Wind Farms
6.6 Case Studies and Results
6.6.1 Study with Unified Power-Flow Model of European 1354-Bus Test System Integrated with 7-Terminal MVDC Network Employing DC Slack-Bus Control and Interfaced with Offshore Wind Farms
6.6.2 Study with Unified Power-Flow Model of European 1354 Bus Test System Integrated with 7-Terminal MVDC Network Employing DC Voltage Droop Control and Interfaced with Offshore Wind Farms
6.6.3 Study with Sequential Power-Flow Model of European 1354 Bus Test System Integrated with 7-Terminal MVDC Network Employing DC Slack-Bus Control and Interfaced with Offshore Wind Farms (Model-B)
6.6.4 Study with Sequential Power-Flow Model of European 1354-Bus System Integrated with 7-Terminal MVDC Network Employing DC Voltage Droop Control and Interfaced with Offshore Wind Farms (Model B)
6.7 Summary
Appendix: Derivations of Difficult Expressions
Bibliography
Index
