دانلود رایگان مقاله انگلیسی, فیلتر توان اکتیو شبکه با استفاده از اینورتر چند سطحه Cascade با سوئیچینگ نامتقارن کنترل زاویه

Grid Active Power Filters using Cascaded Multilevel Inverters with Direct Asymmetric Switching Angle Control for Grid Support Functions

سال انتشار : 2013

نوع مقاله : IEEE CONFERENCE PUBLICATION

تعداد صفحات : 6

Abstract—This paper presents a new control technique for

cascaded multilevel inverters, which can achieve harmonic and

reactive power compensation and balance unbalanced load

simultaneously. Unlike existing control strategies which work in

the time domain and focus on reducing the overall harmonics

and reactive power without differentiating individual harmonics,

this new method works in the frequency domain and can

efficiently compensate individual harmonics and reactive power

apart from balancing unbalanced load. The principle of the

proposed technique is to compensate harmonics and reactive

power and balance unbalanced load with direct asymmetric

firing angle and conduction angle control for each H-bridge of

multilevel inverter. To verify the effectiveness of this new

technique, genetic algorithm (GA) is used to solve

transcendental equations and find switching angles of each Hbridge

of multilevel inverter. From the simulation results, it can

be seen that the proposed technique can not only achieve the

same harmonic and reactive power compensation performance

with a much lower switching frequency than traditional control

methods of cascaded multilevel inverter based active power

filter (APF), but also can balance unbalanced loads successfully

at the same time.

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