The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The recently proposed power-synchronization control for grid-connected voltage-source converters (VSCs) has been shown to be a feasible solution for high-voltage direct-current (HVDC) transmission connected to high-impedance weak ac systems. In this paper, power-synchronization control is investigated for VSC-HVDC links connected to another type of weak ac system, i.e., low-inertia or island systems...
This paper presents a detailed model of a Voltage Source Converter (VSC) operated HVDC transmission system, simulated with EMTP-RV package, in order to investigate its operational performance. The VSC control strategy is explained using vector control. The effect of de-coupling between the control parameters is investigated by applying disturbances in the reference quantities of active and reactive...
This paper contains a model predictive control (MPC) approach for high voltage direct current (HVDC) lines, where in particular the voltage source converter (VSC) HVDC configuration is investigated. The target is to develop a control method which, given the requested power and alternating/direct voltage references, yields an appropriate set of voltage references to be fed to the modulation scheme...
Due to the potential future energy crisis and ever increasing population, wind power, as a renewable energy source producing no emissions and with a sufficient wind resource in many parts of the world, is attracting increasing interest and growing rapidly. Offshore wind strength is relatively much stronger than onshore levels and many large-scale wind farms (greater than 1GW) are planned to be constructed...
The performance of VSC based HVDC system partially depends on its control strategy. Based on the steady state model of VSC-HVDC system, a power control strategy is proposed and a series of mathematical analysis expressions for power delivery are deduced using the coordinate conversion and variables substitution in terms of the original equations. The corresponding power controllers are designed using...
This paper proposes a dynamic model and control strategy for the voltage source converter based high voltage direct current transmission (VSC-HVDC) under fault AC conditions. After simplify the equivalent circuit of the VSC transmission system, a VSC-HVDC electromagnetic transient model which considering the loss of the phase reactors has been built. To restrain the DC voltage double line-frequency...
The objective of this paper is to show performances of the deadbeat controller applied to a VSC-HVDC transmission link. The system studied is based on 3-level neutral point clamped (NPC) converters. The dynamic response of the VSC-HVDC is of primary importance under various operating conditions. It is also important that the converter valve currents be limited during AC disturbances in order to avoid...
This paper proposes a dynamic model and control strategies of a voltage source converter (VSC) based high voltage direct current transmission system. Assuming there is no zero-sequence components exist and the AC network is balance, so there are no negative-sequence components and the voltage and current variables are all positive-sequence components expressed in the positive-sequence frame. In this...
The use of a voltage source converter high voltage DC (VSC-HVDC) transmission system in parallel with an AC submarine cable to connect a large offshore wind farm to the grid is discussed. The main objective of such connection is to address the reliability issues of the point-to-point VSC-HVDC transmission scheme in the event of AC and DC faults. Control system design is described in detail and the...
This paper develops the dynamic mathematical model of the rectifier and inverter side controllers for a Voltage Sourced Converter (VSC) based high voltage DC (VSC-HVDC) link employing Insulated Gate Bipolar Transistor (IGBT) with PWM control. The controller derived using instantaneous power theory, parks transformation, and similarity transformation is expected to maintain the dc link voltage and...
This paper is about a study on inverter control of a voltage source converter based high voltage direct current (VSC-HVDC) transmission system. An inverter model has been developed for the purpose of system control and stability analysis. The VSC-HVDC system is the exclusive power supply to a passive load in this study, and the control objective is to obtain a constant sinusoidal output voltage under...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.