Voltage Source Converters (VSC) have for the first time been used for HVDC transmission in a real network. Experience from the design and commissioning of the transmission shows that the technology has now reached the stage where it is possible to build high voltage converters utilising Insulated Gate Bipolar Transistors (IGBTs). Operation and system tests have proved that the properties that h...

High-voltage direct current (HVDC) is a commonly used technology for long-distance power transmission, due to its low resistive losses and low costs. In this paper, a novel distributed controller for multi-terminal HVDC (MTDC) systems is proposed. Under certain conditions on the controller gains, it is shown to stabilize the MTDC system. The controller is shown to always keep the voltages close...

The optimal control gains of the VSC HVDC converter are very dependent on the Short Circuit Ratio (SCR) of the ac system to which the converter is connected. This paper introduces off-line SCR estimation based on pre-set switching status of the ac system. The control gains of the VSC HVDC system can be adjusted on-line to achieve optimal performance based on a calculation of the SCR. However, w...

Similar to AC system, the insulation system of DC system also gets affected. The HVDC station is a challenging environment for measurement of partial discharge level due to very high interference levels caused from the switching of thyristor-controlled converters. There is also significant interference from external air-corona due to high electric stress at the surface of conductors and hardwar...

In this paper, investigation is carried out for the improvement of power system stability by utilizing auxiliary controls for controlling HVDC power flow. The current controller model and the line dynamics are considered in the stability analysis. Transient stability analysis is done on a multi-machine system, where, a fuzzy logic controller is developed to improve the stability of the power sy...

An efficient model has been developed to simulate High Voltage Direct Current (HVDC) Converters in real-time transient simulators. Real time performance of 45 μs per solution step has been achieved for a 12-pulse monopolar converter and 81 μs for the bipolar converter using a single processor Pentium Pro 200 MHz desktop computer. The HVDC converter model is solved simultaneously with the power ...

This paper modeled a doubly fed induction generator (DFIG) based offshore wind farm integrated through a voltage source converter –based high voltage direct current (VSC-HVDC) transmission system, which is collected with infinite bus for small signal stability analysis. The control system of HVDC system is considered for the stability analysis. The impact of the VSC control parameters on the ne...

In this paper HVDC is investigated for its ability to supply a passive industrial system. The objective of the paper is to assess the potential and limitation of the use of dc distribution in the industrial power system. The performance of the dc supplied distribution system is compared with pure ac supplied distribution system of simi lar ratings under balanced faults on the grid side and moto...

This paper presents optimal AGC regulator design of deregulated power system based on the full state feedback control strategy. The two-area interconnected power system of identical nature consisting of non-reheat turbine is considered for the investigations. The areainterconnection of the power system via parallel EHVAC/HVDC transmission link is considered. The proposed controller is applied t...