Journal ArticleDOI
Adaptive Droop Control for Effective Power Sharing in Multi-Terminal DC (MTDC) Grids
Reads0
Chats0
TLDR
In this article, a scheme for adapting the droop coefficients to share the burden according to the available headroom of each converter station is proposed, and the advantage of this adaptive (variable) droop scheme for autonomous power sharing is established through transient simulations on an MTDC grid with four bipolar converters and DC cable network with metallic return.Abstract:
Following a converter outage in a Multi-Terminal DC (MTDC) grid, it is critical that the healthy converter stations share the power mismatch/burden in a desirable way. A fixed value of power-voltage droop in the DC link voltage control loops can ensure proper distribution according to the converter ratings. Here a scheme for adapting the droop coefficients to share the burden according to the available headroom of each converter station is proposed. Advantage of this adaptive (variable) droop scheme for autonomous power sharing is established through transient simulations on an MTDC grid with four bipolar converters and DC cable network with metallic return. Results for both rectifier and inverter outages under two different scenarios are presented. Post-contingency steady-state operating points obtained from transient simulation are shown to be consistent with those derived analytically. Impact of varying droop coefficients on the stability of the MTDC grid is established. An averaged model in Matlab/SIMULINK which has been validated against detailed switched model in EMTDC/PSCAD is used for the stability and modal analysis.read more
Citations
More filters
Proceedings ArticleDOI
Impact of Primary Frequency Droop Coefficients on Lyapunov Stability of Linearized Asynchronous AC-MTDC System
TL;DR: In this paper, the stability boundaries for several cases are numerically constructed in the space of frequency droop coefficients, based on observation made form these boundaries, necessary and sufficient condition for stability is hypothesized.
Study on VSC HVDC Modeling and Control Strategies for Wind Power Integration
Asimenia Korompili,Qiuwei Wu +1 more
Proceedings ArticleDOI
An Improved Droop Control Method for VSC- MTDC Considering Power Mismatch Allocation
Qian Yihui,Zhen Wang,Deng Yinqiu +2 more
TL;DR: An improved droop control method that can establishes a common DC voltage signal across the VSC-MTDC grids and the effectiveness of the proposed control strategy on power sharing of is verified by time-domain simulation studies of a four-terminal VSC -MTDC system in PSCAD/EMTDC.
Journal ArticleDOI
A Novel Peer-to-Peer Control Strategy for Multiterminal DC Distribution Systems
TL;DR: In this paper , a peer-to-peer control strategy (PPCS) is proposed for DC voltage control and power sharing in multi-terminal DC distribution systems (MTDCDSs).
Proceedings ArticleDOI
Average voltage regulation in droop-controlled MTDC grids
TL;DR: The issues with the control of the MTDC voltage when the average voltage regulation approach is used are investigated and the system performance is evaluated when large communication latencies are present in transferring the required voltage information.
References
More filters
Book
Power System Stability and Control
TL;DR: In this article, the authors present a model for the power system stability problem in modern power systems based on Synchronous Machine Theory and Modelling, and a model representation of the synchronous machine representation in stability studies.
Journal ArticleDOI
Generalized averaging method for power conversion circuits
TL;DR: In this paper, a more general averaging procedure that encompasses state-space averaging and that is potentially applicable to a much broader class of circuits and systems is presented, including resonant type converters.
Vector analysis and control of advanced static VAr compensators
TL;DR: The advanced static VAr compensator (ASVC) as mentioned in this paper is based on the principle that a self-commutating static inverter can be connected between three-phase AC power lines and an energy storage device, such as an inductor or capacitor, and controlled to draw mainly reactive current from the lines.
Journal ArticleDOI
Vector analysis and control of advanced static VAr compensators
C. Schauder,H. Mehta +1 more
TL;DR: In this paper, two fundamentally different types of invertor can be used for this purpose, one providing control of output voltage magnitude and phase angle, and the other having only phase angle control.
Journal ArticleDOI
Power-Synchronization Control of Grid-Connected Voltage-Source Converters
TL;DR: In this article, a power-synchronization control method for grid-connected voltage-source converters (VSCs) is proposed, which utilizes the internal synchronization mechanism in ac systems, in principle, similar to the operation of a synchronous machine.