DESIGN AND IMPLEMENTATION OF ACTIVE POWER FILTER.pptx
- 1. SEMINOR ON THE DESIGN AND SIMULATION OF FOUR-LEG BASED THREE-PHASE FOUR-WIRE SHUNT ACTIVE POWER FILTER
- 2. CONTENTS • ABSTRACT • INTRODUCTION • OVERALL BLOCK DIAGRAM • BIDIRECTIONAL POWER FLOW CONTROL • BASE PAPER SIMULATION RESULTS • EXTENTION PAPER SIMULATION RESULTS • COMPARISON OF RESULTS OF PROPOSED AND EXISTING WORK • CONCLUSION
- 3. ABSTRACT • Newly evolved household / domestic appliances based on power electronics have started to behave as single- phase non-linear loads • Operating as sources of voltage / current harmonics , these loads when connected to a three-phase distribution network pollute line current with harmonics and create an increase in the neutral wire current • This work proposes a four-wire three-phase four-wire bypass active filter based on fuzzy logic. The predictive part is responsible for generating the SAPF offset current while the dc link voltage control is done by fuzzy logic technique • The proposed control strategy eliminates harmonic currents, compensate for reactive power and neutral line current , and balanced load currents. simulations are performed under different loading conditions to validate the effectiveness of the proposed technique.
- 4. • Recently, the control quality difficulties are managed by a huge number of PCs and other touchy electrical responsibilities. For example, the diode rectifier and the thyristor head loading are part of an expanding power matrix. Thus, these tones do the electrical circuit irreparable damage. Since this is a noise framework, I advise for example that symphonic amounts like IEEE 519, Tuned LC- should be kept. Fuzzy logic controllers have been utilized as a quick and easy way to replace noise currents with a limited number of high-passes. In general, their acts lead to the network's undesirable reverberation. • The APF, which contains a condenser-loaded voltage inverter (V) on the DC bus, is thought to be a solution for limiting guiding noise. The unfair age distribution significantly effects voltage rotation in architecture control. This will lead to a modernization of pay and compensation structures. The primary feature of this work is the prestigious, updated Power logic Fuzzy logic control design despite the usage of dynamic power Fuzzy logic controls with three-stroke voltage source inverters (3L-VSI). INTRODUCTION
- 5. Overall Block Diagram FOUR-LEG BASED THREE-PHASE FOUR-WIRE SHUNT ACTIVE POWER FILTER
- 6. TOPOLOGY OF FOUR-LEG BASED THREE-PHASE FOUR- WIRE SHUNT ACTIVE POWER FILTER
- 7. A common power dispersion framework with limitless power was configured in the overall block diagram. It consists of several kinds of power units and various workloads. The wind and daylight are essentially limitless. Change the voltage and long-static power storage systems using PWM converters (dynamic converters) and DCs (static converters). The wind and sun is mostly separate A powerful dynamic In order to return current music and in reactive rules, the Fuzzy logic controller is employed. The topology also comprises an electrolytic condenser, PWM converter and Y Fuzzy logic controller of the first order. This circuit has a high-power circuit, a low-performance circuit and a load-level system. The Fig shows the 4-legged PWM converter. This topology is like the 3-stage converter with the fourth stage as a bridge. Reducing positive and negative polarity enhances respectively (current non-positive to negative, up to current non-unequal). OPERATING PRINCIPLES
- 8. Bidirectional Power Flow Control From the neutral (n), the voltage can be derived for any leg in the converter: Thevenin impedances at the converter output terminals Zeq are used to express the output parameters Req and Leq of the 4L-VSI. . As a result, a connection to Z and a parallel connection to the device equivalent load impedance decide the in equivalent impedance. According to this model, it is assumed that ZL>>Z, the resistance in the system is not considered negligible, while the reactance is 3 to 7 p.u. at last, finally More of less.
- 9. CURRENT REFERENCE GENERATION A direct reference voltage regulator is the current signals that are being obtained. The present load values are the current signals in Figures. This estimates the reactive power, current harmonies and the total current des-equilibrium. The relation between the load power output and the perceived power is defined by sin(L) and THD(L).
- 10. CONT. • where THD is the compensable current that can flow twice as quickly as the sample frequency fs (L). The highest current harmonics compensated for by a switching frequency of one or less than one half are 50% of the switching frequency. Due to the rotational reference method, Sin(w) and cos(w) must multiply the estimated currents (w). Currently the neutral mechanism with the dq transformation is brought into phase. The synchronized reference framework generates the sin(wt) and cos(wt) signals (SRF). • Despite the lack of a sinusoidal waveform by SRF-LL Harmonics (that is, under 5 and 3 percent in the 5th and 7th) are fully accounted, as SRF-LLs are not impacted and are very accurate by non-linear load situations. The true dq derivatives (u and vs. w) can be seen (id and iq). It is employed as filter for a lower cut-off frequency of the DC current component of the phase shift. The phase reference (DSC) ac and the DSC components are achieved through the phase referencing of the relevant AC and DS. It is vital to apply an active voltage as shown in Section IVA to maintain dc voltage constant. • The following transforms the three-phase signals into the effects of Park and Clark: Inverse park and transforming Clark (6). The pitch in this document is a 20 Hertz LPF cut-off frequency. In addition to being phase-shifted, 180° will make the current move through neutral device.
- 11. DC-VOLTAGE CONTROL. In conventional controllers, only current variables are used to compute the cost function (6). this is also based on empirical observations Electrolytic capacitors do not respond quickly to changing voltages. and this is due to the fact the DC voltage stays constant (at 6V RMS). The amplitude of the signal is set to active power absorbed We are calculating the DC voltage, then comparing it to a reference. processing errors use a PID controller, whose gain scores are also depend on KP and Tic The dc-transfer function (1st-order system) sends the output to the PI controller the same controller of the provided closed-loop transfer
- 12. CONT Since the time response of the dc-voltage loop does not require much movement, damping factor (the number) ζ = 1 and natural angular velocity (the constant speed of the voltage's motion) were selected instead to generate a critically damped one. The equivalent time delay time Ti = 1/K can be determined Ziegler process. •FUZZY LOGIC CONTROLLER Fuzzy Logic controllers are crude neural models of the brain The experiences by doing These are past the point of solution are covered by normal problem-solving bundles as far as far as possible. As well, it allows for less focused machine constructions to be created. We feel that with this new method of registration, the framework de-bonairment is made easier than before. these default registration strategies are believed to be the following steps in the organization Even simple creatures are equipped with facilities that far exceed those of PCs today. Presently, in organic research, a universal concept of the common element This study shows that brains use analogies. Some of these examples appear exceedingly complex and allow us to see numerous angles. Data should be separated, stored, and cleaned up before problems are confronted, then registered. This field makes huge use of parallel systems, but also prepares various other systems to deal with problems. Similarly, this field uses terms such as carry on, respond, arrange, study, and summarise are used.
- 13. BASE PAPER SIMULATION RESULTS
- 14. EXTENTION PAPER SIMULATION RESULTS
- 15. COMPARISON OF RESULTS OF PROPOSED AND EXISTING Dynamic power FUZZYZY logic has been implemented using the free-wheeling controller has been aphoric Many choices are made so that you can see the Power logic Fuzzy LOGIC CONTROLLER's great controller the current for dynamic fuzzy logic power control logic gets 4.18% THD, but FUZZY LOGIC source gets 2.97% TH I conduct a test on the composed controller for dynamic power control and see its results are listed in the controller FUZZYN. The 'dynamic' 'fuzzy' power controller emphases the appropriation while dismissing non-straight transducer negation From here, it follows that the FUZZY LOGIC controller is a better option than the PI controller. The existing study describes the performance analyzes of the p-q and SRF theory of four-leg, four-wire four-wire SAPF based on the p-q and SRF simulation theory research. The p-q analysis gives an improved outcome compared to SRF theory under balanced supply and balance load conditions (Case-1). In contrast, its performance is reduced compared with the theory of SRF when the load changes (Case-2) and the unbalanced supply voltage and balancing load conditions (Case3).
- 16. CONCLUSION