Simulation of HVDC System Steady and Transient Response by an Analytical Method

Abstract

This paper proposes an analytical method for simulation of the steady and transient response of the HVDC system in order to simulate the electromagnetic process of HVDC system in the simulation of hybrid AC/DC system. First, the boundaries of AC and DC systems as well as some assumptions are introduced. Then, the HVDC system is considered as a combination of primary equipment subsystems (PES) and control subsystems (CS). According to the assumptions, the PES can be represented by different homogeneous linear differential equations within different time intervals that are determined by the status of converters. These equations can be solved in analytical method. The CS is expressed by nonlinear differential and algebraic equations and simulated in numerical integration method. The interface parameters of each module are also introduced. The accuracy and efficiency of the proposed model are verified by comparing the simulation results computed by the proposed model with that simulated in PSCAD. INDEX TERMS AC/DC hybrid system simulation, HVDC, electromagnetic transient process, commutation failure.

Protection of an HVDC Link Towards Modeling and Simulation Based DC Connection Defects

“…The system depicted in Fig. 1 is a monopolar HVDClink system (500 kV/2kA) with 12-pulse thyristor converters on both the rectifier and inverter sides in this analysis, which is focused on the first CIGRÉ HVDC benchmark system [12] [13]. As seen in Table 1, the model was applied in the simulator, with the rectifier connected to the first AC system (315 kV, SCR=5) and the inverter connected to the second AC system (230 kV, SCR=3).…”

Non‐characteristicharmonic resonance in line commutated converters‐high‐voltage direct current terminals: A practical case study

“…As high‐voltage direct‐current (HVDC) transmission has advantageous performances in long‐distance bulk‐power delivery, it has been widely employed in the interconnection of power grids 1‐5 . However, the inherent non‐linear feature of power converters makes it generate abundant harmonics.…”