Real-time simulation of a three-terminal high-voltage directcurrent (HVDC) grid connected to a doubly-fed induction generator (DFIG) based wind farm has been presented in this paper. A recently invented control strategy, known as powersynchronization control, is applied for the integration of the wind farm to the HVDC grid. The dynamic performance study of the system under normal wind power flu...

Remote offshore wind power plants are expected to be connected via HVDC systems to the main grids. The extension of single point-to-point HVDC systems into meshed HVDC grids is discussed actively. This leads the integration of DC technology into the collection grid of the wind farm to gain interest and relevance. Using DC technology in the collection grid demands the wind turbine systems to hav...

This paper presents the integration of the Voltage Source Converted-High Voltage Direct Current model| (VSCHVDC) into a conventional Optimal Power Flow (OPF) formulation. The assembled VSC-HVDC-OPF model is computationally implemented and solved by using the Matlab ® optimization toolbox. In this sense, the development complexity degree of the proposed implementation is equivalent to that requi...

This paper presents the HVDC system for power system to control the power flow between two converter stations. In this paper, rectifier side is used to control current and inverter side is used to control current as well as extinction angle. In power control system, proportional-integral (PI) controller is widely used. Here we compare its performance with conventional controller and artificial ...

Large offshore wind farms are recently emerging as promising alternative power sources. Long distances between offshore generation and onshore distribution grid demand new solutions for their connection to the AC network. HVDC systems based on voltage source converters (VSC) are a promising alternative to conventional AC transmission above a certain cable length. This paper presents a new VSC t...

Experience and theoretical analysis show that the voltage and power stability becomes an important issue when high-voltage direct current (HVDC) systems using line-commutated converters (LCC) are connected to AC systems with low short-circuit capacity and that these problems become more pronounced the lower the short-circuit capacity of the connected AC system is, as compared with the rating of...

Because of high reliability and other characteristics, High Voltage Direct Current (HVDC) Light system had important applications in power transmission system. In order to ensure its operation safety, the fault diagnosis technologies based on observer were researched. The model of HVDC light system was introduced, and the types and characteristics of the system were analyzed. Several common fau...

HVDC circuit breaker with sufficient interruption capability and interruption speed, as a key technology to enable HVDC transmission in meshed multi terminal networks do not yet exist. AC circuit breakers in combination with a passive resonance path are used to build HVDC breakers even though the requirements for AC breaking strongly differ from requirements for DC current interruption. Current...

In this paper, a nonlinear controller for VSC-HVDC transmission system is proposed. The feedback linearization based nonlinear differential-geometric techniques is used to cancel nonlinearities and decouple the input control variables. A predictive current control (PCC) method is also proposed. It can predict the current reference for the next sampling instant rapidly and accurately. Comprehens...

This work presents a series tapping station for integrating Offshore Wind Power Plants (OWPP) into a (Line Commutated Converter High Voltage Direct Current) LCCHVDC transmission system. The tapping station allows to integrate wind power resources without building a new HVDC link and it is based on a Current Source Converter (CSC). However, the CSC requires a minimum DC current to extract the po...