TY - JOUR
T1 - Comparison of 2L-VSC and MMC-based HVDC Converters
T2 - Grid Frequency Support Considering Reduced Wind Power Plants Models
AU - Pereira, Heverton Augusto
AU - Mendes, Victor Flores
AU - Harnefors, Lennart
AU - Teodorescu, Remus
PY - 2017/11/8
Y1 - 2017/11/8
N2 - Several technologies for wind power plants (WPPs) have been developed during the last years, increasing the number of such plants connected to the electrical power systems. Therefore, studies for the integration of these technologies into the grid are required, including their contribution to the power system stability. This paper compares two technologies of high-voltage direct-current (HVDC) transmission system during frequency support provided by WPPs. Considering the grid side converter, modular multilevel converters (MMCs) and two-level voltage-source converters are compared in terms of dynamic behavior, and disturbance rejection capability. A frequency domain analysis for frequency support studies using MMC-based HVDC is proposed. For study cases, a large WPP connected in a hydro-dominated power system, based on IEEE 12-bus system is simulated using Matlab/Simulink tool. In frequency and time domain analysis, similar dynamic performances were found out in normal operation conditions, but during frequency support conditions, a slight improved stability performance was observed in MMC topology. This fact is important in HVDC systems, since a good DC-link regulation, with more disturbance rejection capability, can improve the system reliability.
AB - Several technologies for wind power plants (WPPs) have been developed during the last years, increasing the number of such plants connected to the electrical power systems. Therefore, studies for the integration of these technologies into the grid are required, including their contribution to the power system stability. This paper compares two technologies of high-voltage direct-current (HVDC) transmission system during frequency support provided by WPPs. Considering the grid side converter, modular multilevel converters (MMCs) and two-level voltage-source converters are compared in terms of dynamic behavior, and disturbance rejection capability. A frequency domain analysis for frequency support studies using MMC-based HVDC is proposed. For study cases, a large WPP connected in a hydro-dominated power system, based on IEEE 12-bus system is simulated using Matlab/Simulink tool. In frequency and time domain analysis, similar dynamic performances were found out in normal operation conditions, but during frequency support conditions, a slight improved stability performance was observed in MMC topology. This fact is important in HVDC systems, since a good DC-link regulation, with more disturbance rejection capability, can improve the system reliability.
KW - frequency support
KW - high-voltage direct-current (HVDC)
KW - modular multilevel converters (MMCs)
KW - voltage-source converters (VSCs)
KW - wind power plants
UR - http://www.scopus.com/inward/record.url?scp=85041563445&partnerID=8YFLogxK
U2 - 10.1080/15325008.2017.1378941
DO - 10.1080/15325008.2017.1378941
M3 - Journal article
AN - SCOPUS:85041563445
SN - 1532-5008
VL - 45
SP - 2007
EP - 2016
JO - Electric Power Components and Systems
JF - Electric Power Components and Systems
IS - 18
ER -