Generalized modeling of DC grid for stability studies

This paper presents a mathematical model that can be used to analyze and study transient and small signal stability of large multi-terminal HVDC networks. The model describes converter ac side and dc grid electromagnetic transients in detail, and can also incorporate basic HVDC controllers, such as current, dc voltage, and active and reactive power controllers, including dc voltage-active power droop-control. Also, it shows the necessary interfacing procedures to link converter ac side and dc grid dynamic equations to that of the control systems using power balance equations, where the converter semiconductor losses are incorporated. The validity of the presented model is confirmed against a detail model where the converters are modeled by their switch models on a six-terminal dc grid. Additionally, results illustrate the model's ability to predict dc grid transient response and small signal stability, which are presented and discussed.

[1]  Li Peng,et al.  Coordinated Control of Multiple HVDC systems for damping interarea oscillations in CSG , 2007, 2007 IEEE Power Engineering Society Conference and Exposition in Africa - PowerAfrica.

[2]  C. Y. Chung,et al.  An Inter-Area Mode Oriented Pole-Shifting Method With Coordination of Control Efforts for Robust Tuning of Power Oscillation Damping Controllers , 2012, IEEE Transactions on Power Systems.

[3]  Ronnie Belmans,et al.  Generalized steady-state VSC MTDC model for sequential AC/DC power flow algorithms , 2013, 2013 IEEE Power & Energy Society General Meeting.

[4]  Minxiao Han,et al.  Influence of the MIIF index on operation of multi-infeed HVDC systems , 2011, 2011 IEEE Electrical Power and Energy Conference.

[5]  A. S. Emarah,et al.  Stability Analysis of a Modulated AC/DC System Using the Eigenvalue Sensitivity Approach , 1986, IEEE Transactions on Power Systems.

[6]  G. Andersson,et al.  Voltage stability analysis of multi-infeed HVDC systems , 1997 .

[7]  S. J. Finney,et al.  New Breed of Network Fault-Tolerant Voltage-Source-Converter HVDC Transmission System , 2013, IEEE Transactions on Power Systems.

[8]  D. Mukhedkar,et al.  Comparative analysis and study of the dynamic stability of AC/DC systems , 1988 .

[9]  G. P. Adam,et al.  Transient capability assessments of HVDC voltage source converters , 2012, 2012 IEEE Power and Energy Conference at Illinois.

[10]  Qing Xiao,et al.  Nonlinear Control Parameters Optimization of Multi-Infeed AC/DC System Based on Normal Form Theory , 2011, 2011 Asia-Pacific Power and Energy Engineering Conference.

[11]  C. Karawita,et al.  Multi-Infeed HVDC Interaction Studies Using Small-Signal Stability Assessment , 2009, IEEE Transactions on Power Delivery.

[12]  Yasser Abdel-Rady I. Mohamed,et al.  Assessment and Mitigation of Interaction Dynamics in Hybrid AC/DC Distribution Generation Systems , 2012, IEEE Transactions on Smart Grid.

[13]  P.F. de Toledo,et al.  Multiple Infeed Short Circuit Ratio – Aspects Related to Multiple HVDC into One AC Network , 2005, 2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific.

[14]  Stephen J. Finney,et al.  Control of multi-terminal DC transmission system based on voltage source converters , 2010 .

[15]  Hu Ji-wei,et al.  Notice of RetractionFluid Characteristic Research of Cooling-Water on Stator Waterway Blockage in Turbo-generators , 2010, 2010 Asia-Pacific Power and Energy Engineering Conference.

[16]  Pei Li,et al.  Damping Interarea Oscillations by Multiple Modal Selectivity Method , 2009, IEEE Transactions on Power Systems.

[17]  Hongyang Huang,et al.  Improving Performance of Multi-Infeed HVDC Systems Using Grid Dynamic Segmentation Technique Based on Fault Current Limiters , 2012, IEEE Transactions on Power Systems.

[18]  Boming Zhang,et al.  An Improved Approach for AC-DC Power Flow Calculation With Multi-Infeed DC Systems , 2011, IEEE Transactions on Power Systems.

[19]  Kr Padiyar,et al.  Study of torsional interactions in multi-terminal DC systems through small signal stability analysis , 1991 .

[20]  O. Anaya-Lara,et al.  Small-Signal Stability Analysis of Multi-Terminal VSC-Based DC Transmission Systems , 2012, IEEE Transactions on Power Systems.

[21]  R.K. Pandey.  Stability Analysis of AC/DC System With Multirate Discrete-Time HVDC Converter Model , 2008, IEEE Transactions on Power Delivery.

[22]  Lin Zhu,et al.  Modeling and Analysis of Large Scale Power System with Multi-infeed HVDC by EMTDC , 2010, 2010 Asia-Pacific Power and Energy Engineering Conference.

[23]  J. Reeve,et al.  Multi-infeed HVDC transient response and recovery strategies , 1993 .

[24]  Zhe Chen,et al.  Power-Flow Control and Stability Enhancement of Four Parallel-Operated Offshore Wind Farms Using a Line-Commutated HVDC Link , 2010, IEEE Transactions on Power Delivery.

[25]  Hongyang Huang,et al.  Transient stability analysis of Shanghai Power Grid with multiple HVDC links , 2010, 2010 International Conference on Power System Technology.

[26]  Zheng Xu,et al.  Coordination and optimization of small signal modulators in multi-infeed HVDC systems , 2003, 2003 IEEE PES Transmission and Distribution Conference and Exposition (IEEE Cat. No.03CH37495).

[27]  Barry W. Williams,et al.  Network fault tolerant voltage-source-converters for high-voltage applications , 2010 .

[28]  Zhinong Wei,et al.  A Commentary on Voltage Stability of Multi-Infeed AC/DC System with VSC-HDVC , 2011, 2011 Asia-Pacific Power and Energy Engineering Conference.