Enhanced Frequency Support of MMC-MTDC Systems with Offshore Wind Plants Integration

다국어 초록 (Multilingual Abstract)

With the increasing penetration of renewable energy generation in the power grid, there have been several actual cases of high-voltage direct-current (HVDC) systems replacing conventional high-voltage AC power transmission systems for long-distance power transmission. The widely used full-scale converter (FSC) wind turbines (type 4), unlike the traditional synchronous generators, cannot provide inertial constant support for system frequency stability owing to their special structural problem. Therefore, a control strategy that provides virtual inertia for a system using an HVDC inverter is proposed. Currently, this method is mostly used in a single HVDC transmission line. This study investigates the frequency stability of a modular multilevel converter-based multi-terminal HVDC combined with offshore wind power plants. An enhanced virtual inertia compensation strategy is proposed to improve the frequency stability of onshore AC systems. This study uses the multi-terminal HVDC network of the CIGRE benchmark to build a power grid model and simulate AC systems with different levels of robustness. The simulation results prove the effectiveness of the reinforcement method.

참고문헌 (Reference)

1 Leon AE, "Virtual synchronous generator for VSC-HVDC stations with DC voltage control" 2022

2 Du C, "VSC-HVDC for industrial power systems"

3 Xiong Y, "Two-level combined control scheme of VSC-MTDC integrated off shore wind farms for onshore system frequency support" 36 (36): 781-792, 2021

4 Vennelaganti SG, "Stability criterion for inertial and primary frequency droop control in MTDC grids with implications on ratio-based frequency support" 35 (35): 3541-3551, 2020

5 Kim K-H, "Robust control of PMSG wind turbine systems with back-to-back PWM converters" 2010

6 Vennelaganti SG, "Ratio-based selective inertial and primary frequency support through MTDC grids with off shore wind farms" 33 (33): 7277-7287, 2018

7 Hosseini Naveh IM, "Quasi-oppositional method for output tracking control by swarm-based MPID controller on AC/HVDC interconnected systems with virtual inertia emulation" 9 : 77572-77598, 2021

8 Zhang Q, "Primary frequency support through north american continental HVDC interconnections with VSCMTDC systems" 36 (36): 806-817, 2021

9 Stan A, "Overview and assessment of HVDC current applications and future trends" 15 (15): 1-, 2022

10 Sun K, "Optimized allocation method of the VSC-MTDC system for frequency regulation reserves considering ancillary service cost" 8 (8): 53-63, 2022

11 Raza A, "Optimal Power Flow and Unified Control Strategy for Multi-Terminal HVDC Systems" 7 : 92642-92650, 2019

12 Avdiaj EB, "Negative Sequence Control for Virtual Synchronous Machines Under Unbalanced Conditions" 10 (10): 5670-5685, 2022

13 Avu BK, "Modelling and simulation of wind turbine using PMSG" 2021

14 Pegueroles J, "Modelling and analysis of CIGRE HVDC off shore multi-terminal benchmark grid" 80 : 72-82, 2015

15 Zhang L, "Modeling, control, and protection of modular multilevel converter-based multi-terminal HVDC systems : a review" 3 (3): 340-352, 2017

16 Wu QW, "Modeling and modern control of wind power" Wiley 85-116, 2018

17 Fan L, "Modeling Type-4 wind in weak grids" 10 (10): 853-864, 2019

18 Zhu J, "Inertia emulation control strategy for VSC-HVDC transmission systems" 28 (28): 1277-1287, 2013

19 Li B, "Inertia emulation and dynamic voltage support scheme for MMC-based dc systems" 13 (13): 146-154, 2019

20 Liu B, "Impedance modeling and controllers shaping eff ect analysis of PMSG wind turbines" 9 (9): 1465-1478, 2021

21 CIGRE B4 Working Group, "Guide for the development of models for HVDC converters in A HVDC grid"

22 Sandeep V, "Grid connected wind power system driven by PMSG with MPPT technique using neural network compensator" 2016

23 Li Z, "Frequency support control method for interconnected power systems using VSC-MTDC" 36 (36): 2304-2313, 2021

24 Adeuyi OD, "Fast frequency response from off shore multiterminal VSC–HVDC schemes" 32 (32): 2442-2452, 2017

25 Commission Regulation (EU), "Establishing a network code on requirements for grid connection of high voltage direct current systems and direct current-connected power park modules"

26 Gnanarathna UN, "Effi cient modeling of modular multilevel HVDC converters(MMC)on electromagnetic transient simulation programs" 26 (26): 316-324, 2011

27 Moawwad A, "Dynamic security-constrained automatic generation control(AGC)of integrated AC/DC power networks" 33 (33): 3875-3885, 2018

28 Saad H, "Dynamic averaged and simplifi ed models for MMC-based HVDC transmission systems" 28 (28): 1723-1730, 2013

29 Shadabi H, "Dual adaptive nonlinear droop control of VSC-MTDC system for improved transient stability and provision of primary frequency support" 9 : 76806-76815, 2021

30 Chen J, "Deviation-free frequency control of MMC-MTDC converter based on improved VSG" 2019

31 Merlin MMC, "Cell capacitor sizing in multilevel converters : cases of the modular multilevel converter and alternate arm converter" 8 (8): 350-360, 2015

32 Yang R, "Autonomous synchronizing and frequency response control of multi-terminal DC systems with wind farm integration" 11 (11): 2504-2514, 2020

33 Kumar AS, "An interactionless duo control strategy for bipolar voltage-source converter in renewables integrated multiterminal HVdc grids" 58 (58): 5383-5394, 2022

34 Wang W, "Adaptive droop control of VSC-MTDC system for frequency support and power sharing" 33 (33): 1264-1274, 2018

35 Tavakoli SD, "AC fault ride through in MMC-based HVDC systems" 37 (37): 2775-2786, 2022

36 Li G, "A frequency prevention and control method of MMC-HVDC connected to passive power grid considering DC capacitor energy buffer" 2022

37 Hussein DN, "A Type-4 wind power plant equivalent model for the analysis of electromagnetic transients in power systems" 28 (28): 3096-3104, 2013