This paper presents a diode rectifier (DR)-based hybrid converter topology for high-voltage direct current (HVDC) transmission system with offshore wind farms (OWFs). The consists of DR and an auxiliary converter. A high conversion ratio ac/dc is designed as the converter, which can form grid voltage OWFs to achieve black-start. Under steady state, all active power output from delivered through...

Harmonics have become an important issue in modern power systems. The widespread penetration of non-linear loads to emerging power systems has turned power quality analysis into an important operation issue under both steady state and transient conditions. This paper employs a Dynamic Harmonic Domain (DHD) based framework for dynamic harmonic analysis of VSC-HVDC systems. These systems are wide...

This paper develops a coordination control strategy for wind farms with line commutated converter (LCC) based HVDC delivery to participate in inertia response and load frequency control. The coordination philosophy is to let the HVDC rectifier sense the grid frequency. If the grid frequency is too high or too low, active power flow through the HVDC link will be ramped down or up by introducing ...

In this paper we show how a fairly large proportion of those commutation failures that are due to single-phased short circuits to earth can be avoided. In a control circuit based on a digital signal processor (DSP) it is possible, with instantaneous results, to switch from a normal control strategy with equidistant firing pulses to a strategy that takes into consideration the potentially danger...

This paper derives a method for HVDC line placement in order to maximize social welfare. Assuming linear generator costs, it shows that for N congestions, there exist exactly N + 1 marginal generators. It then demonstrates that HVDC lines connecting a high-cost with a low-cost marginal generator lead to the maximization of social welfare. The method poses an upper bound on the line installation...

This paper presents a new modeling concept underlining the development of complex models for advanced power system components using HVDC Light as an example. Instead of writing the model for HVDC Light in different simulation tools as user defined component, a “common component” is developed which represents the detailed control functionality of HVDC Light. This common component is then linked ...