Modeling and Analysis of HVDC Converter by Three-Phase Dynamic Phasor

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

“…By substituting Equation (7) into Equation (6), V dc can be represented as (8). Furthermore, γ and Equations (3)- (5) are accordingly modified under the abnormal condition to Equations (8)- (12).…”

“…In [7], the conseil international des grands reseaux electriques (CIGRE) benchmark HVDC system model was adopted to simulate a VSC-integrated LCC-HVDC system to connect an offshore wind farm to a mainland network. In [8,9], the operation of LCC-HVDC systems was investigated during commutation failure using the CIGRE benchmark model with respect to variations in the DC-line voltage and the valve current, respectively. However, the HVDC system models discussed so far need additional modifications to incorporate the operating characteristics of real HVDC systems because the parameters (e.g., rated power, voltage, etc.…”

An EMT-DP Hybrid Simulation Method of AC-DC Power System

“…Therefore, compared with the electromagnetic transient calculation method, the proposed hybrid simulation method can reduce the computational scale effectively. At the same time, the dynamic phasors simulation method can reduce simulation time effectively is analysed in detail in [6]. As a consequence, the proposed hybrid simulation method can reflect the dynamic characteristics of AC-DC systems effectively improve the simulation speed.…”

“…The theory is to find out the time-varying Fourier coefficient of the principal components of the time-varying signal based on Fourier transform, and then build dynamic phasors models which could reflect dynamic characteristics of the specified component. This method has utilized in modelling for power electronics successfully, such as HVDC systems [6,7], FACTS [8] and DC -DC converter [9]. To take advantage of these three models in AC-DC system simulation, dynamic phasor simulation, electromechanical transient -dynamic phasor simulation and electromagnetic transient -dynamic phasor simulation of AC-DC system have been researched in [10][11][12].…”

Modelling and Simulation of HVDC Systems Considering the Harmonics of Converter Based on Dynamic Phasors Theory

“…The simulation models of the HVDC converter considering the fundamental component and necessary harmonic components of converter under the asymmetrical conditions of AC system are presented based on dynamic phasors theory in [7]. What's more, the dynamic phasors theory has been used in modelling and analysis of solid state transformer [8,9], thyristor-controlled series capacitor [10,11], unified power flow controller [12,13], dc-dc converters [14], multiconverter ac systems [15] and other power electronic devices or power systems with power electronic devices successfully. However, the dynamic phasors simulation model of HVDC systems considering the fundamental component and harmonic components of the converter under the symmetrical condition of AC system theory hasn't been researched and the harmonic components of the converter of HVDC systems should be considered to reflect the dynamic characteristics of HVDC systems more accurately.…”