# INSTANTANEOUS POWER THEORY AND APPLICATIONS TO POWER CONDITIONING PDF

to all the scientists and engineers who have participated in the development of Instantaneous Power Theory and. Applications to Power Conditioning and. This book covers instantaneous power theory as well as the importance Combined Series and Shunt Power Conditioners (Pages: ). This book presents a deep review of various power theories and shows how the instantaneous active and reactive power theory provides an.

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Introduction. 1. Concepts and Evolution of Electric Power Theory. 2. Applications of the p-q Theory to Power Electronics Equipment. 4. Harmonie . Request PDF on ResearchGate | Instantaneous Power Theory and Applications to Power Conditioning | The prelims comprise: Half Title Title Copyright. Request PDF on ResearchGate | Instantaneous Power Theory and Applications to Power Conditioning | This book presents a deep review of various power.

As one of the most hazardous power quality problems, current harmonics generated by the nonlinear loads cause equipment overheating, voltage quality degradation, excessive transmission power losses, and malfunction of sensitive devices [ 2 , 3 ]. Moreover, they also decrease overall system efficiency and worsen power factor PF performances.

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Therefore, it is crucial to mitigate the harmonics level of a power system. Shunt active power filter SAPF [ 4 , 5 ] is designed specifically for this purpose.

## A system to control power currents of ineffective instantaneous power compensation

Additionally, it also provides reactive power compensation meant for power factor correction. Most SAPFs utilize a standard two-level inverter configuration in their design.

However, multilevel inverters have recently proven to possess significant advantages over conventional two-level inverters [ 6 , 7 ]. Their ability to produce stepwise output with higher voltage level reduces the harmonics contents of the output signals and simultaneously minimizes the power losses.

## Instructor

However, in the context of APFs, the multilevel inverters employed are mostly restricted to three-level [ 8 , 9 ] due to complexity in controller design which involves larger number of switching states and greater severity of voltage imbalance to the capacitors as the number of level increases. In three-level neutral point diode clamped NPC inverter, voltage across the split capacitors has to be maintained as half of the overall DC-Bus voltage.

The effectiveness of SAPFs in power quality mitigation strictly depends on their control strategies. Specifically, the controller comprises three main algorithms, namely, harmonics extraction algorithm, voltage control algorithm, and current control or switching algorithm.

Among these algorithms, the harmonics extraction algorithm is deemed to be the most crucial part that leads SAPF to achieve its optimal performance [ 10 , 11 ].

Accurate and efficient harmonics extraction leads to proper and fast reference current generation which further controls the SAPF to generate the required injection current for harmonics mitigation.

Among all the existing algorithms, PQ Theory has advantages over the others such as simple design, increased speed, and fewer calculations, making it more likely to be implemented practically. However, the latest trend in PQ Theory algorithm is still applying numerical filters such as low pass filter LPF [ 14 , 16 — 18 ], both LPF and high pass filter HPF [ 11 ], and band reject filter BRF [ 15 ] to detect the desired real power signal for reference current generation.

The dependency on these sluggish numerical filters is the main factor that limits the harmonics extraction performance which in turn degrades the overall harmonics mitigation result.

## Mathematical Problems in Engineering

Moreover, the performance of numerical filters strictly depends on their tuned cutoff frequency where the tuning is normally realized through tedious approach. Furthermore, a good trade-off between cutoff frequency and the order of filter is difficult to be attained, but it is required to ensure optimum performance. Besides that, another weakness of the conventional PQ Theory algorithm is related to the characteristic of its generated reference current.

Kharitonov, S. Google Scholar 7. Google Scholar 8.

Fryze, S. Google Scholar 9.

Pankratov, V. Google Scholar CrossRef Google Scholar Lee, S. The topology Therefore, the active power filters have emerged as more selection depends upon total harmonic distortion, power rating efficient solution to the harmonics.

The key advantage of and cost of passive filter components, power factor, filter active filters over passive filter is their superior response to losses, switching losses, capability to provide harmonic isolation between load and supply, control complexity [30].

## Instantaneous Power Theory and Applications to Power Conditioning (eBook)

This is due to the time due to its performance and easy implementation. The shunt dependent harmonic spectrum e. The active power filters APF have series or system as shown in fig.

The instantaneous power p-q parallel topology depending upon the type of harmonic theory is used for current reference generation and is sources. The p-q theeory has the advantage a of selectinng the components independeently [31].

The time-doomain calculaation allows decidinng about the exxact instant annd amount of compensation c The developm ment of pow wer electroniccs devices and a to be provided p for elimination.

Thesse types of nonnlinear loads are a to Thiss can be applieed to three-phasse- threee-wire or threee-phase-four-w wire system [].These nonlinear loads draw nonsinusoidal active filters, called hybrid power filter HPF is preferred currents from supply and causes distortion called harmonics. CrossRef Google Scholar Meanwhile, the controller is composed of harmonics extraction algorithm, DC-Bus voltage control algorithm, synchronizer algorithm, neutral point voltage control algorithm, and current control switching algorithm.

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The shunt active power filter is used as harmonics [18] Benchaita L. A three-phase three-level NPC inverter is employed to function as the SAPF, and the nonlinear load consists of a bridge rectifier which is considered as the worst source of harmonics in electrical system [ 31 , 32 ]. Power Electron.

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Therefore, this paper presents an enhanced version of PQ Theory algorithm known as Enhanced PQ with average algorithm that suits the operation of ICC based SAPF in which the reference current is derived from fundamental active current instead of the current harmonics.

Figure 15 Load current and its harmonic spectrum [11] El-Habrouk M.

Distrib, Vol.

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