Performance of Three Level H-Bridge Inverter in Grid Connected Solar PV for Multifunctional Operations using Different Control Techniques

This paper presents multifunctional operation capability of three level cascade H bridge inverter for grid connected solar pv application. The solar panel and inverter are modelled for unbalance and nonlinear loads with three control techniques (pq,dq,cpt) and its performance is simulated in the MATLAB environment using SIMULINK and Sim Power System (SPS) toolboxes. The performance of inverter is evaluated for harmonics elimination, power factor correction apart from active and reactive power support to grid and nonlinear load .Performance of three level H bridge inverter is evaluated for both PV mode and STATCOM mode using three control techniques for distribution grid.

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Simulating and Building an Appliance Clustering Fuzzified SVC for Single Phase System

ELEKTRIKA- Journal of Electrical Engineering ◽

10.11113/elektrika.v20n1.235 ◽

2021 ◽

Vol 20 (1) ◽

pp. 34-42

Author(s):

Osama Ahmed ◽

Abdul Wali Abdul Ali

Keyword(s):

Power System ◽

Power Factor ◽

Reactive Power ◽

Power Factor Correction ◽

Fast Response ◽

Reactive Power Compensation ◽

Phase System ◽

Smart Meter ◽

Power Monitoring ◽

Compensating Devices

A power system suffers from losses that can cause tragic consequences. Reactive power presence in the power system increases system losses delivered power quality and distorted the voltage. As a result, many studies are concerned with reactive power compensation. The necessity of balancing resistive power generation and absorption throughout a power system gave birth to many devices used for reactive power compensation. Static Var Compensators are hunt devices used for the generation or absorption of reactive power as desired. SVCs provide fast and smooth compensation and power factor correction. In this paper, a Fuzzified Static Var Compensator consists of Thyristor Controlled Reactor (TCR) branch and Thyristor Switched Capacitors branches for reactive power compensation and power factor correction at the load side is presented. The system is simulated using Simulink using a group of blocks and equations for measuring power factor, determining the weightage by which the power factor is improved, determining the firing angle of TCR branch, and capacitor configuration of TSC branches. Furthermore, a hardware prototype is designed and implemented with its associated software; it includes a smart meter build-up for power monitoring, which displays voltage, current, real power, reactive power and power factor and SVC branches with TRIAC as the power switching device. Lastly, static and dynamic loads are used to test the system's capability in providing fast response and compensation. The simulation results illustrated the proposed system's capability and responsiveness in compensating the reactive power and correcting the power factor. It also highlighted the proportional relation between reactive power presence and the increased cost in electricity bills. The proposed smart meter and SVC prototypes proved their capabilities in giving accurate measurement and monitoring and sending the data to the graphical user interface through ZigBee communication and power factor correction. Reactive power presence is an undesired event that affects the equipment and connected consumers of a power system. Therefore, fast and smooth compensation for reactive power became a matter of concern to utility companies, power consumers and manufacturers. Therefore, the use of compensating devices is of much importance as they can increase power capacity, regulate the voltage and improve the power system performance.

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Power factor correction in power delivery systems with mutipulse nonlinear loads

Proceedings of the higher educational institutions ENERGY SECTOR PROBLEMS ◽

10.30724/1998-9903-2020-22-6-3-15 ◽

2021 ◽

Vol 22 (6) ◽

pp. 3-15

Author(s):

D. E. Egorov ◽

V. P. Dovgun ◽

N. P. Boyarskaya ◽

A. V. Jan ◽

A. S. Slyusarev

Keyword(s):

Power Factor ◽

Distribution Systems ◽

Reactive Power ◽

Power Factor Correction ◽

Reactive Power Compensation ◽

Delivery Systems ◽

International Standards ◽

Power Delivery ◽

Nonlinear Loads ◽

Compensating Devices

THE PURPOSE. Мutipulse rectifiers are widely used as a nonlinear loads in industrial distribution systems. The advantage of mutipulse rectifiers is low harmonic emission and high power factor. However input currents of mutipulse rectifiers have a wide spectrum including characteristic and noncharacteristic harmonics. This has a negative impact on the power quality. Shunt capacitors are the simplest form of reactive power compensation in industrial power distribution systems. However power systems with nonlinear loads suffer from severe harmonic distortion due to the parallel resonance between capacitors and system inductance. Special compensating devices for reactive power compensation and correction of power system frequency response for resonances damping are necessary. METHODS. In this paper shunt compensating devices for power delivery systems with multipulse nonlinear loads are considered. Proposed devices are composed of 3-5 order parallel connected passive broadband filters. They provide power factor correction, voltage and current harmonics mitigation and resonance modes damping. A general broadband filter design procedure based on frequency and reactive power scaling of normalized filter parameters is developed. RESULTS. Characteristics of different compensating devices configurations using broadband passive filters are discussed. It is shown that broadband filtering devices enable compensation of fundamental frequency reactive power as well as mitigation of voltage harmonic level to values determined by Russian and international standards. Proposed devices have lower fundamental power losses in c omparing with known solutions. CONCLUSION. Proposed analytical design method is applicable to broadband filters of different orders.

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Comparison of Reactive Power Control Techniques for Solar PV Inverters to Mitigate Voltage Rise in Low-Voltage Grids

Electronics ◽

10.3390/electronics10131569 ◽

2021 ◽

Vol 10 (13) ◽

pp. 1569

Author(s):

Dilini Almeida ◽

Jagadeesh Pasupuleti ◽

Janaka Ekanayake

Keyword(s):

Power Control ◽

Power Factor ◽

Power Flow ◽

Reactive Power ◽

Low Voltage ◽

Voltage Regulation ◽

Solar Pv ◽

Reactive Power Control ◽

Control Techniques ◽

Power Factor Control

The greater integration of solar photovoltaic (PV) systems into low-voltage (LV) distribution networks has posed new challenges for the operation of power systems. The violation of voltage limits attributed to reverse power flow has been recognized as one of the significant consequences of high PV penetration. Thus, the reactive power control of PV inverters has emerged as a viable solution for localized voltage regulation. This paper presents a detailed study on a typical Malaysian LV distribution network to demonstrate the effectiveness of different reactive power control techniques in mitigating overvoltage issues due to high PV integration. The performance of four reactive power control techniques namely, fixed power factor control, scheduled power factor control, power factor control as a function of injected active power, and voltage-dependent reactive power control were analyzed and compared in terms of the number of customers with voltage violations, reactive power compensation, and network losses. Three-phase, time-series, high-resolution power-flow simulations were performed to investigate the potential overvoltage issues and to assess the performance of the adoption of reactive power controls in the network. The simulation results revealed that the incorporation of reactive power controls of solar PV inverters aids in successfully mitigating the overvoltage issues of typical Malaysian networks. In particular, the Volt-Var control outperformed the other control techniques by providing effective voltage regulation while requiring less reactive power compensation. Furthermore, the comparative analysis highlighted the significance of employing the most appropriate control technique for improved network performance.

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Design and Implementation of a Solar Panel Inverter as STATCOM Compensator

ELEKTRIKA- Journal of Electrical Engineering ◽

10.11113/elektrika.v20n1.234 ◽

2021 ◽

Vol 20 (1) ◽

pp. 1-8

Author(s):

Mutaz Alnahhas ◽

Abdul Wali Abdul Ali

Keyword(s):

Power System ◽

Power Factor ◽

Reactive Power ◽

Power Factor Correction ◽

Pi Controller ◽

Reactive Power Compensation ◽

Solar Panel ◽

Solar Array ◽

Smart Meter ◽

Static Synchronous Compensator

A power system suffers from different losses, which can cause tragic consequences. Reactive power presence in the power system increases system losses delivered power quality and distorts the voltage. As a result, many researches are concerned with reactive power compensation. Moreover, reactive power should not be transmitted through a transmission line to a longer distance. Thus, Flexible AC Transmission Systems (FACTS) devices such as static synchronous compensator (STATCOM), static volt-ampere compensator (SVC), and unified power flow controller (UPFC) are utilized to overcome these issues. The necessity of balancing resistive power generation and absorption throughout a power system becomes a big concern in the electrical systems for reactive power compensation. Static synchronous compensator STATCOM is a shunt device used for the generation or absorption of reactive power as desired. STATCOM provides smooth and fast compensation and power factor correction. In this thesis, a solar Static synchronous compensator takes the DC input from the solar panel and inverted utilizing an H-bridge inverter. This topology is used for reactive power compensation and power factor correction at the load side. The simulation was done using MATLAB Simulink simulation tools. The system model was built using a single solar array for DC input and controlled using perturbation and observe method to maximize its power output. The STATCOM model was built using for high power MOSFETs to perform H- bridge inverter. The STATCOM was controlled using a hysteresis band current control using a PI controller to inject the current into the system. A hardware prototype of STATCOM was built and controlled using an Arduino microcontroller. The simulation results have demonstrated the STATCOM model of reactive power compensation and correcting the power factor under different loads of conditions. It also highlighted the proportional relation between reactive power presence and the increased cost of electricity bills. The proposed smart meter of STATCOM gives accurate reading and measurement. Overall, the simulated results showed a satisfactory level of compensation of reactive power and power factor correction. The system contained three significant parts; solar array, H- bridge inverter, and the PI controller. The smart meter circuit was capable of displaying readings regarding input solar voltage, current, and power factor on the LCD screen.

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Evaluation of Harmonic Current Effect and Distribution Line Voltage Control Ability of Reactive Power Control by use of Power Factor Correction Converter in Consumer Load

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes.139.678 ◽

2019 ◽

Vol 139 (11) ◽

pp. 678-687

Author(s):

Ken-ichi Kondo ◽

Jumpei Baba

Keyword(s):

Power Control ◽

Power Factor ◽

Reactive Power ◽

Power Factor Correction ◽

Voltage Control ◽

Current Effect ◽

Harmonic Current ◽

Reactive Power Control ◽

Line Voltage ◽

Distribution Line

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Power factor correction using capacitors & filters

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i2.12.11288 ◽

2018 ◽

Vol 7 (2.12) ◽

pp. 234

Author(s):

Karthik Subramanian ◽

Shantam Tandon

Keyword(s):

Root Mean Square ◽

Phase Difference ◽

Power Factor ◽

Reactive Power ◽

Power Factor Correction ◽

Active Filters ◽

Minimum Amount ◽

Mean Square ◽

The Real ◽

Electrical Consumption

Power factor is the ratio of the real current or voltage received by a load to the root mean square (rms) value of the current or voltage that was supposed to be acquired by the same load. The fact that the two become different is due to the presence of reactive power in the circuit which gets dissipated.Improving the power factor means reducing the phase difference between voltage and current. Since majority of the loads are of inductive nature, they require some amount of reactive power for them to function. Therefore, for the better use of electrical appliances with minimum amount of electrical consumption, the power factor should necessarily be increased and should be brought near to 1. This can be easily done by the help of Automatic Power Factor Correction Capacitors and Active filters.

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