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...

The interconnection stability of a grid-connected voltage-source converter (VSC) can be assessed by the passivity properties of the VSC input admittance. If critical grid resonances fall within regions where the input admittance acts passively, i.e., has nonnegative real part, then their destabilization is generally prevented. This paper presents an overview of passivity-based stability assessm...

This paper investigates performance of Fuzzy Supervisory Controller (FSC) in control of power converters. A FSC module is added to conventional narrow bandwidth voltage regulator in Power Factor Corrected (PFC), Voltage Source Converter (VSC) to improve DC bus voltage regulation. PFC converter is selected for this work as conventional design of the PFC converter requires narrow bandwidth DC bus...

This paper presents an adaptive variable structure con-troller(VSC) for set-point regulation of a class of non-linear systems. Due to the existence of the sign function , the conventional VSC has the input chattering phenomenon even in the steady state. The method used in this paper essentially solves the problem by using a decreasing switching control input whose size is proportional to the tr...

A iicwly dcsigncd optiinal control mctliod is prcswitcd. The proposcd controller i s dcsigncd via combining classical sink Eecdback conlrol and variable slructure control (VSC). This new method fully matches the merits of the easy design of the linear quadratic (LQ) method and the strong robustiicss o f thc VSC. Thc prescntcd optimal control mcthod is dcnlonstrated on il synchronous reluctance ...

Power synchronization control (PSC) tends to destabilize the VSC connected stiff grid. For addressing this issue, paper proposes a novel scheme named as power self-synchronization (PSSC), which enables operate under grid conditions with short circuit ratio (SCR) from 1 infinity. Similar PSC, proposed method also includes loop, voltage and current loop. Yet, PSSC-based VSC(PSSC-VSC) can be self-...

experimental tests were performed to study the seismic behavior and performance ofmodified steel chevron braced frame systems, which incorporate a vertical slotted connection(vsc) detail between the top of the braces and the floor beam above. the vsc detail isintended to prevent vertical load transfer to the beam and limit brace forces to thecompressive resistance of the members. full-scale qua...

This paper presents an alternate approach for designing power system stabilizers (PSS) based on variable structure control to enhance small signal stability of Single Machine Infinite-Bus Power System (SMIB). The state feedback gains and switching surface have been tuned using Global Optimization (multistart clustering GO) for an Eigen value based performance index. The robustness of the propos...

1. Introduction In general, on a snow-covered or otherwise slippery road, an abrupt steering change will cause unstable vehicle behavior, or excessive speed will make the vehicle deviate from the intended path. The vehicle stability control (VSC) system detects such conditions and stabilizes the vehicle. Although the use of VSC has begun to increase, it is not yet widely seen in inexpensive car...

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...