With the increasing amounts of wind power being installed on electrical grids, the characterization ofwind turbines during all operating conditions is essential for system operators to ensure security and stabilityfor their customers. This characterization must be achieved by appropriate models of various wind turbinetechnologies that can accurately depict the interaction betwee...

A detailed model of wind power station, including Double Fed Induction Generator, DFIG is presented in this paper. Two control mechanisms are included in the model. The inner control system uses stator flux oriented control for the rotor side converter and grid voltage vector control for the grid side converter. The outer control system is used for wind turbine pitch angle. PSCAD/EMTDC is us...

Unreasonable control parameters of the Line Commutated Converter based High Voltage Direct Current (LCC-HVDC) system may induce small-signal instability. This paper studies impact inverter controller on steady response LCC-HVDC under weak AC grid condition. Firstly, according to a practical project, model is established switching function. Then, eigen-analysis method adopted study side oscillat...

A fast two-vector Phase-locked loops (PLL) control has been proposed to the phase and frequency of grid voltage using 48-pulse switching. The novel controller senses shift as a deviation by load locked positive sequence. was designed track angle kept within satisfying rang at all time. PI- obtain desired performance PLL. PLL voltage. test results shows that new design can response sequence betw...

When the Modular Multilevel Converter (MMC) fails on AC side, operating characteristics of MMC will be damaged. If system wants to retain stable for a long time in process operation, it is obliged design control strategy case asymmetric fault. In this article, based feedback linearization principle adopted diminish negative sequence current caused by breakdown, and DC voltage controller devised...

The cascaded hybrid LCC-MMC inverter is considered as a feasible option to mitigate the commutation failure problem of conventional LCC-HVDC while maintaining bulk power transmission capability. However, coupling between different types converters may result in instability when integrates with weak AC systems. This paper establishes small-signal model based HVDC system and validates against PSC...

This work presents a methodology, based on the modeling of an electrical power system test created in PSCAD/EMTDC simulation environment. The purpose is to evaluate, at first, impacts that Thyristor Controlled Series Compensator (TCSC) and Static Var (SVC) cause transient angular stability generators against disturbances, evaluating rotor displacement synchronous under analysis. In second momen...

Abstract Distributed bus protection is one of the main tasks smart substation construction to improve secondary system because it economical, simple, easy layout, and realize double. This paper mainly considers that distributed current differential limited by high precision synchronization bandwidth a based on directional impedance element comparison principle proposed. The constructed reverse ...

Distributed generator (DG) is widely used and applied due to the energy environment issues. photovoltaic generation a typical kind of DG. Its output power random fluctuant, which has great influence on safe, stable economic operation system. Thus it necessary identify generated by distributed generation. This paper proposes identification method based BP Neural Network. The sample data comes fr...