Admittance-Dissipativity Analysis and Shaping of Dual-Sequence Current Control for VSCs

Gong, H.Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark. (författare)

QC 20220314
This paper analyzes the admittance-dissipativity of dual-sequence current control for grid-connected voltage-source converters (VSCs). The output admittance model of dual-sequence current control is first developed in the stationary reference frame by using complex vectors. Impacts of digital filters used within current control and voltage-feedforward (VFF) control loops, and of the delay compensation at the fundamental frequency, are then evaluated. It is found that the cascaded use of sequence-decomposition filter (SDF) and the low-pass filter (LPF) in the VFF control loop adds a non-dissipative region in the output admittance, and the fundamental-frequency delay-compensation further worsens the dissipativity. An analytical design method for the LPF is then developed to mitigate the non-dissipative region, which lowers the instability risks and improves the stability robustness of dual-sequence current control under different grid conditions. Lastly, simulations and experimental results corroborate theoretical analyses.

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Annan elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Other Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
Admittance
Converters
Current control
delay compensation
Delays
Digital filter
dissipativity
Power conversion
sequence control
Stability analysis
Transfer functions
voltage feedforward
Control systems
Digital filters
Electric current control
Natural frequencies
System stability
Analytical design method
Decomposition filter
Dissipativity analysis
Fundamental frequencies
Stability robustness
Stationary reference frames
Voltage feed-forward
Voltage-source converter
Low pass filters

Wang, X.Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark. (författare)
Harnefors, Lennart,1968-KTH,Elkraftteknik,ABB, Corporate Research(Swepub:kth)u149g11f (författare)
Hasler, Jean PhilippeHITACHI ABB Power Grids (författare)
Danielsson, ChristerHITACHI ABB Power Grids (författare)
Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark.Elkraftteknik (creator_code:org_t)

Ingår i:IEEE Journal of Emerging and Selected Topics in Power Electronics: Institute of Electrical and Electronics Engineers (IEEE)10:1, s. 324-3352168-67772168-6785

Av författaren/redakt...: Gong, H.; Wang, X.; Harnefors, Lenna ...; Hasler, Jean Phi ...; Danielsson, Chri ...

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