This paper investigates the relationship between frequency support by voltage-source converter based high-voltage direct current (VSC-HVDC) systems and deloaded wind power operation considering stability constraints. The is incorporated as additional constraints in optimal flow (OPF) analysis. reserve capacity of plants should be provided for support, which requires output suppression during st...

In order to improve the performance of voltage source converter-high voltage direct current (VSC-HVDC) system, we propose an improved auto-disturbance rejection control (ADRC) method based on least squares support vector machines (LSSVM) in the rectifier side. Firstly, we deduce the high frequency transient mathematical model of VSC-HVDC system. Then we investigate the ADRC and LSSVM principles...

This paper proposes a fundamental and efficient control technique for introducing VSC (voltage source converter)based HVDC (high voltage direct current) transmission into a large-scale offshore wind power generation system with DFIGs (doubly-fed induction generators). The electric power from the offshore wind turbine DFIG is considerably fluctuating and unstable, and needs to be transmitted fro...

This paper demonstrates the interoperability of an emerging alternate arm converter (AAC) with state-of-the-art modular multilevel (MMC) in high-voltage direct current (HVDC) systems based on a hybrid VSC-HVDC system. The also showcases parameter derivation HVDC system and its detailed control structure. study provides preliminary steps towards analysis AAC complex dc grid configurations. A set...

The doubly-fed induction generators (DFIGs) integrated to the grid through voltage source converter-high direct current (VSC-HVDC), cascaded droop control from system frequency DC voltage, then active output of DFIG, was applied enhance regulation capability power system. improved dynamic flow (DPF) model newly proposed quantify response coordinated with inertia VSC-HVDC and DFIGs, primary sync...

It is economic and secure to determine the optimal siting sizing of offshore wind farms (OWFs) integrated into AC system through voltage-source converter high-voltage direct current (VSC-HVDC) links. In this paper, an planning model for VSC-HVDC-link-based OWFs capacitors proposed, where a decomposition technique presented solve proposed mixed-integer nonlinear programming (MINLP) problem obtai...

Abstract: This paper presents a robust non-linear hybrid controller based on Type-2 fuzzy and sliding mode control strategy for VSC-HVDC transmission link, which inherits the benefits of these two methods. The interval Type-2 fuzzy (IT2FSMC) is used to handle the uncertainties to enhance the real time performance. The sliding mode control combines with the fuzzy system to compensate the influen...

A mathematical model of a voltage source converter is presented in the synchronous reference frame for investigating VSC-HVDC for transferring wind power through a long distance. This model is used to analyze voltage and current control loops for the VSC and study their dynamics. Vector control is used for decoupled control of active and reactive power and the transfer functions are derived for...

In this paper, the interconnection of a strong AC system to a weak AC system by using a Voltage Source Converter (VSC) based High Voltage DC (HVDC) transmission system is investigated. In this work, the weak AC system considered is an island system comprised of synchronous generators and passive load. Analysis is carried out for UPF load and inductive load. The ac filter requirement to achieve ...

Abstract: This paper evaluates application feasibility of a Hybrid Multi-terminal HVDC system and wind-thermal-bundled plants simulated in DIgSLIENT PowerFactory environment. The proposed hybrid MTDC system consists of two line-communicated converters (LCC), which are connected to both wind farms and thermal power plants, and one voltage source converter (VSC) at the grid side. Control strategi...