Search Results - subject:"reactive power control"

Mitigation of Asymmetrical Grid Faults in Induction Generator-Based Wind Turbines Using Constant Power Load

Jelani, Nadeem; Molinas, Marta - In: Energies 6 (2013) 3, pp. 1700-1717

Constant power loads (CPLs), interfaced through active rectifiers can be used for improving the stability of induction generator (IG)-based wind turbines under balanced grid voltage dips by providing the reactive power. Under asymmetrical grid faults, the negative sequence voltage produces...

Persistent link: https://www.econbiz.de/10010668053

Power quality improvement in microgrid using custom power devices

Prabhakar, Prajith; Vennila, H. - In: International journal of enterprise network management 8 (2017) 4, pp. 327-339

Persistent link: https://www.econbiz.de/10011853414

Crowbar System in Doubly Fed Induction Wind Generators

Salles, Maurício B. C.; Hameyer, Kay; Cardoso, José R.; … - In: Energies 3 (2010) 4, pp. 738-753

In the last 15 years, the use of doubly fed induction machines in modern variable-speed wind turbines has increased rapidly. This development has been driven by the cost reduction as well as the low-loss generation of Insulated Gate Bipolar Transistors (IGBT). According to new grid code...

Persistent link: https://www.econbiz.de/10011030829

Optimal allocation and adaptive VAR control of PV-DG in distribution networks

Fu, Xueqian; Chen, Haoyong; Cai, Runqing; Yang, Ping - In: Applied Energy 137 (2015) C, pp. 173-182

adaptive reactive power control model is introduced in PV-DG allocation as to balance the trade-off between the improvement of …

Persistent link: https://www.econbiz.de/10011116023

A MILP model for optimising multi-service portfolios of distributed energy storage

Moreno, Rodrigo; Moreira, Roberto; Strbac, Goran - In: Applied Energy 137 (2015) C, pp. 554-566

arbitrage and various reserve and frequency regulation services through both active and reactive power control. We demonstrate …-service portfolios in the long term. We also demonstrate the value of reactive power control to support not only distribution network …

Persistent link: https://www.econbiz.de/10011116062

Centralized voltage control for distribution networks with embedded PV systems

Cagnano, A.; De Tuglie, E. - In: Renewable Energy 76 (2015) C, pp. 173-185

This paper proposes a centralized control methodology for optimizing nodal voltages of distribution networks by acting on the reactive power produced by PV-inverters. Control actions are centrally evaluated in real-time by solving a constrained dynamic optimization problem aimed at minimizing...

Persistent link: https://www.econbiz.de/10011189885

Configurable, Hierarchical, Model-based, Scheduling Control with photovoltaic generators in power distribution circuits

Jung, Jaesung; Onen, Ahmet; Russell, Kevin; Broadwater, … - In: Renewable Energy 76 (2015) C, pp. 318-329

Existing distribution systems and their associated controls have been around for decades. Most distribution circuits have capacity to accommodate some level of PV generation, but the question is how much can they handle without creating problems. This paper proposes a Configurable, Hierarchical,...

Persistent link: https://www.econbiz.de/10011189894

Coordinated control of automated devices and photovoltaic generators for voltage rise mitigation in power distribution circuits

Jung, Jaesung; Onen, Ahmet; Arghandeh, Reza; … - In: Renewable Energy 66 (2014) C, pp. 532-540

A coordinating, model-centric control strategy for mitigating voltage rise problems due to photovoltaic (PV) penetration into power distribution circuits is presented. The coordinating control objective is to maintain an optimum circuit voltage distribution and voltage schedule, where the...

Persistent link: https://www.econbiz.de/10010806117

Multi-objective coordinated droop-based voltage regulation in distribution grids with PV systems

Samadi, Afshin; Shayesteh, Ebrahim; Eriksson, Robert; … - In: Renewable Energy 71 (2014) C, pp. 315-323

High penetrations of photovoltaic (PV) systems in distribution grids have caused new challenges such as reverse power flow and voltage rise. Reactive power contribution by PV systems has been proposed by grid codes and literature as one of the remedies for voltage profile violation. Recent...

Persistent link: https://www.econbiz.de/10011044015

Reactive power control of wind-diesel-micro-hydro hybrid power systems using matlab/simulink

Bansal, R.C.; Bhatti, T.S.; Kothari, D.P.; Bhat, S. - In: International Journal of Global Energy Issues 24 (2005) 1/2, pp. 86-99

This paper presents reactive power control of isolated wind-diesel-micro-hydro hybrid power system for realistic load … disturbance using matlab/simulink. The mathematical model of the system based on matlab/simulink is developed. Reactive power … control performance is compared using three different types of Static VAR Compensators (SVC). Transient responses for step …

Persistent link: https://www.econbiz.de/10010816918