Control system design for VSC transmission

Jovcic, Dragan; Lamont, Lisa Ann; Abbott, K.

doi:10.1016/j.epsr.2006.06.011

Cited by 18 publications

(9 citation statements)

References 7 publications

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“…The red dashed lines stands for possible voltage range. The vertical black line divides the normal nodes (1-10) and the additional nodes for the converter stations (11)(12)(13)(14)(15). Figure 5 shows the voltage levels in the DC grid.…”

Section: B Optimal Power Flow Resultsmentioning

confidence: 99%

“…Equation (15) shows the most common case. The total generation costs are minimized with a second order model.…”

Section: B Objective Functionmentioning

confidence: 99%

“…"What is the difference if the AC or the DC line is switched off? "The AC and DC line parameters are standard values from[15]-[17] and the line lengths are between 200 and 600 km for the AC lines and 360 to 800 km for the DC lines. The nominal voltage level is 380 kV for the AC grid and 320 kV for the DC grid.…”

mentioning

confidence: 99%

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Optimal power flow for combined AC and multi-terminal HVDC grids based on VSC converters

Wiget

Andersson

2012

2012 IEEE Power and Energy Society General Meeting

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In this paper, an optimal power flow for combined AC and DC grids is proposed. Several suggested projects to increase the transmission capacity are based on multi-terminal HVDC grids (MTDC). The construction of MTDC leads to major changes in the power flow of the existing grids. The problem description given in this paper considers the main points for power flow in a combined AC and MTDC grid. The AC side is calculated with the full power flow equations. The voltage source converter (VSC) are represented with a model based on two generators, an additional AC node and one connecting line. The VSC losses are calculated with a simple model and the DC line losses are also considered. The optimization could focus on several different goals. The resulting optimal power flow is shown in two different grids. Three different scenarios are presented in a small grid with 10 AC nodes and 5 converter stations. In addition, a combined AC and DC grid based on the IEEE118 test system is used to show a large scale example.

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Section: B Optimal Power Flow Resultsmentioning

confidence: 99%

“…Equation (15) shows the most common case. The total generation costs are minimized with a second order model.…”

Section: B Objective Functionmentioning

confidence: 99%

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Optimal power flow for combined AC and multi-terminal HVDC grids based on VSC converters

Wiget

Andersson

2012

2012 IEEE Power and Energy Society General Meeting

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“…In dc grids, power sharing among the terminals is governed by the dc network voltage. Thus, one objective of this paper is to maintain the dc link voltage within a defined limit of ±5% [14], [15] for system stability, rather than selecting a ±10% tolerance limit as dc link voltage control design [16], [17]. This is not as safe limit as ±5%.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Operation and Control of VSC Based Multiterminal High Voltage DC Transmission Systems

Raza

Liu

et al. 2016

IEEE Trans. Sustain. Energy

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This paper deals with a multiterminal voltage source converter (VSC)-based high voltage dc transmission system (M-HVDC) connecting offshore wind farms to onshore ac grids. Three M-HVDC configurations studied, each with different control strategies. The voltage-current characteristics of VSCs are presented and VSC converter operation with different output powers from offshore wind farms is assessed. A generalized droop control strategy is mainly used to realize autonomous coordination among converters without the need of communication. Operation of the three configurations with respect to their control system is analyzed through PSCAD/EMTDC simulations and experimentation. Results show control performance during wind power change, eventual permanent VSC disconnection, and change in power demand from the ac grid side converter.Index Terms-Configuration, VSC based multi-terminal HVDC, offshore wind farms, improved proportional droop control, generalized droop control strategy.

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“…Many of these technologies adopt voltage source converters (VSCs) as an interface of distributed generators because of the nature of the output voltage. VSCs give us advantages including easy controllability and the capability to control circuit parameters like the voltage, current, or output power of the DG [10][11][12][13][14][15]. There are three types of control strategies adopted for the VSCs: 1) active-reactive power control (called PQ control), 2) active power-voltage control (PV control), and 3) voltage-frequency control (VF control).…”

Section: Introductionmentioning

confidence: 99%

Superior decoupled control of active and reactive power for three-phase voltage source converters

Rahbarimagham¹,

Amiri²,

Vahidi³

et al. 2015

Turk J Elec Eng & Comp Sci

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This paper presents an active-reactive power control strategy for voltage source converters (VSCs) based on derivation of the direct and quadrature components of the VSC output current. The proposed method utilizes a multivariable proportional-integral controller and provides almost completely decoupled control capability of the active and reactive power with almost full disturbance rejection due to step changes in the power exchanged between the VSC and the grid. It also imposes fast transient response and zero steady-state error as compared to the conventional power control approaches. The applicability of the proposed power control strategy for providing the robust stability of the system against the uncertainties of the load parameters is also investigated. The superiority of the proposed control strategy over conventional approaches in the new condition of supplying the load is demonstrated. The theoretical aspects of the proposed multivariable-based power control strategy and the conventional approaches are reviewed and simulation results are presented in two separate sections. MATLAB/Simulink 2009a is used to simulate different scenarios of the simulation.

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Control system design for VSC transmission

Cited by 18 publications

References 7 publications

Optimal power flow for combined AC and multi-terminal HVDC grids based on VSC converters

Optimal power flow for combined AC and multi-terminal HVDC grids based on VSC converters

Coordinated Operation and Control of VSC Based Multiterminal High Voltage DC Transmission Systems

Superior decoupled control of active and reactive power for three-phase voltage source converters

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