Power quality improvement of PV-WPGS based grid interactive microgrid using MSWL-CLMS control

• Published in: Energy systems integration Vol. 2; no. 4; pp. 362 - 372
• Main Authors: Gupta, Shikha, Verma, Anjeet, Singh, Bhim, Garg, Rachana, Singh, Alka
• Format: Journal Article
• Language: English
• Published: Tianjin The Institution of Engineering and Technology 01.12.2020; John Wiley & Sons, Inc
• Subjects: Alternative energy sources; Control algorithms; coordinated power flow; DC‐offset rejection capability; distorted grid currents; distorted grid voltages; Distributed generation; distributed power generation; electric vehicle; Electric vehicle charging; Electric vehicles; Electrical loads; Energy resources; frequency locked loops; Frequency locking; fundamental current components; harmonics mitigation; Interactive control; Least mean squares; Least mean squares algorithm; least mean squares methods; load balancing; load flow; modified shrinkage widely linear complex‐valued least mean squares; MSWL‐CLMS algorithm; MSWL‐CLMS control; MSWL‐CLMS method; multiobjective control approach; nonlinear load; Photovoltaic cells; photovoltaic power systems; photovoltaic‐wind power generation system; positive sequence components; power distribution control; Power flow; power generation control; power quality improvement; power supply quality; PV‐WPGS based grid interactive microgrid; PV‐WPGS based grid‐interfaced MG; Reactive power; reactive power compensation; reference current; Research Article; second‐order generalised integrator‐frequency locked loop filter; sinusoidal synchronising signals; steady‐state performance; synchronisation; Unbalance; variable step size; weight vector; Wind power; Wind power generation; wind power plants; zero attractor term; power distribution control; least mean squares methods; power quality improvement; multiobjective control approach; load balancing; distorted grid currents; PV-WPGS based grid-interfaced MG; MSWL-CLMS control; power generation control; distributed power generation; reactive power compensation; MSWL-CLMS method; sinusoidal synchronising signals; nonlinear load; distorted grid voltages; electric vehicle; zero attractor term; coordinated power flow; steady-state performance; wind power plants; weight vector; photovoltaic power systems; fundamental current components; DC-offset rejection capability; reference current; synchronisation; power supply quality; photovoltaic-wind power generation system; modified shrinkage widely linear complex-valued least mean squares; reactive power; frequency locked loops; PV-WPGS based grid interactive microgrid; MSWL-CLMS algorithm; harmonics mitigation; positive sequence components; load flow; second-order generalised integrator-frequency locked loop filter; variable step size
• ISSN: 2516-8401; 2516-8401
• DOI: 10.1049/iet-esi.2020.0031

The frequent change, unbalanced non-linear load or electric vehicle charging currents are the prominent source of distorted grid currents and poor power quality in a micro-grid (MG). Thus, in this study, the modified shrinkage widely linear complex-valued least mean squares (MSWL-CLMS) algorithm for photovoltaic-wind power generation system (PV-WPGS) based grid-interfaced MG is presented. MSWL-CLMS algorithm has zero attractor term with the special feature of DC-offset rejection capability. MSWL-CLMS method offers a variable step size, which updates the weight vector and thus provides a significant enhancement in convergence speed, improves the steady-state performance and enables the accurate and rapid estimation of fundamental current components for the generation of the reference current. The control approach is multi-objective, which is proficiently working for coordinated power flow, harmonics mitigation, load balancing, and reactive power compensation. Further, the system is capable of working satisfactorily under unbalance and distorted grid voltages since it is costumed with the improved second-order generalised integrator-frequency locked loop filter, which extracts positive sequence components and generates sinusoidal synchronising signals. To validate the efficacy of MG, simulation and experimental results of the developed scale down prototype are demonstrated in detail.