scholarly journals Customer compensating device placement control in energy systems

2021 ◽  
Vol 2131 (4) ◽  
pp. 042073
Author(s):  
E Yu Mikaelian ◽  
M A Trubicin
Keyword(s):  
Mathematical Modeling ◽  
Reactive Power ◽  
Energy Systems ◽  
Operating Mode ◽  
Reactive Power Compensation ◽  
Electrical Networks ◽  
Optimal Operating ◽  
Device Placement ◽  
Compensating Devices

Abstract The choice of the installation site for compensating devices is determined by various factors that should be taken into account when performing calculations. The location of reactive power compensation devices is determined by the results of mathematical modeling and the optimal operating mode of individual sections of electrical networks. The paper presents the results of modeling, considers the uncertainties encountered when solving the problem of placing compensating devices.

scholarly journals AUTOMATION OF REACTIVE POWER COMPENSATION IN ELECTRICAL NETWORKS.

2020 ◽  
Vol 85 (05) ◽  
pp. 615-618
Author(s):  
Mukhammadyusuf Shuxrat ugli Mukhammadjonov ◽  
◽  
Azizbek Shokirjon ug‘li Tursunov ◽  
Dostonbek Raximjon o’g’li Abduraximov ◽  
◽  
...  
Keyword(s):  
Reactive Power ◽  
Reactive Power Compensation ◽  
Electrical Networks

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

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.

scholarly journals Power factor correction in power delivery systems with mutipulse nonlinear loads

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.

scholarly journals TECHNICAL MEANS FOR SUPPRESSION OF RESONANCE PHENOMENA IN ELECTRICAL NETWORKS

2021 ◽  
Vol 2021 (60) ◽  
pp. 44-50
Author(s):  
V.V. Kuchanskyy ◽  
◽  
O.V. Savytskyi ◽  
Keyword(s):  
Reactive Power ◽  
Synchronous Generator ◽  
Physical Analysis ◽  
Transmitted Power ◽  
Electrical Networks ◽  
Dc Voltage ◽  
Line Section ◽  
Geometric Length ◽  
Compensating Devices ◽  
Shunt Reactors

The self-excitation phenomenon of generators connected to an unloaded power line is considered. Accordingly, the selected values of the conductivity of the controlled shunt reactors, following the control range (especially in the overload mode), avoid the occurrence of self-excitation of the generators. The physical analysis of the processes occurring at self-excitation of the synchronous generator is given, and the calculated models are developed. It is established that in the case of artificial support along the entire length of the voltage line at the nominal value using controlled compensating devices, the transmission will have properties characteristic of relatively short lines (up to 500 km) regardless of its geometric length. It is determined that the length of the line section at the ends of which the DC voltage is maintained is much less than 500 km. Therefore, less than the natural voltage along the section length will exceed the nominal value at the transmitted power, and the line will have excess reactive power. Consumption in intermediate compensation devices (compensation current must be inductive). Ref.8, fig. 4, tables 4.

scholarly journals Development of Mechanisms for Active-Adaptive Control of Reactive Power Based on Intelligent Electrical Networks

2020 ◽  
Vol 209 ◽  
pp. 02004
Author(s):  
Roman Belyaevsky ◽  
Alexey Gerasimenko
Keyword(s):  
Adaptive Control ◽  
Reactive Power ◽  
Electric Power Industry ◽  
Distribution Networks ◽  
Urgent Problem ◽  
Electrical Networks ◽  
Power Losses ◽  
Multilevel Systems ◽  
Network Organizations ◽  
Compensating Devices

Improving the energy efficiency of the power grid complex is an urgent problem. The need to solve this problem is due to various technical and economic reasons. First of all, this is due to high power losses in distribution electrical networks, caused by a significant load of its elements by reactive power flows. In this regard, the development of mechanisms for active-adaptive control of reactive power is becoming increasingly important. Currently, the Smart Grid concept has become widespread in the global electric power industry. The use of these technologies allows not only to optimize power losses in distribution networks, but also to improve the efficiency of the electric grid complex. The article proposes an algorithm for optimizing the placement of compensating devices in the distribution network on the example of one of the territorial network organizations of the Kuzbass. This algorithm is based on the theory of multilevel systems using the method of indefinite Lagrange multipliers. The results of applying this algorithm based on the developed simulation model are presented.

Optimal Design of Passive Filter Groups Based on Three Kinds of Operation Modes

2013 ◽  
Vol 392 ◽  
pp. 611-617
Author(s):  
Kai Liang Wang ◽  
Jiang Zeng
Keyword(s):  
Power System ◽  
Optimization Design ◽  
Reactive Power ◽  
Operation Mode ◽  
Operating Mode ◽  
Reactive Power Compensation ◽  
Passive Filter ◽  
Harmonic Elimination ◽  
Investment Cost ◽  
Filter Group

Parameters of passive filter (PF) group are usually designed according to single operating mode, in general the maximum operation mode. When power system is being operated in other operation mode, it is impossible to meet the requirement of power system in reactive power compensation and harmonic elimination simultaneously when whichever filter group is out of service. For this reason, based on three kinds of typical operation mode, namely the maximum, average and minimum mode, the optimization design of PF group is performed and reasonable parameters are determined to achieve the optimal matching between harmonic elimination and reactive power compensation by the lowest investment cost. The feasibility of the proposed method is verified by simulation results.

scholarly journals On the Mutual Influence of Voltage Control Modes and the Compensation of Reactive Power in the Electrical Networks of Industrial Enterprises

2021 ◽  
Vol 64 (3) ◽  
pp. 239-249
Author(s):  
V. P. Schasny ◽  
A. I. Zhukouski
Keyword(s):  
Power Supply ◽  
Reactive Power ◽  
Mutual Influence ◽  
Voltage Control ◽  
Reactive Power Compensation ◽  
Electrical Network ◽  
Electrical Networks ◽  
Industrial Enterprises ◽  
Technical Requirements

The efficiency of an enterprise’s power supply system depends on the quality of electricity and the losses of the latter in electrical networks; both being largely determined by the modes of voltage control and reactive power compensation. In practice, the problems of voltage control and reactive power compensation in power supply systems of industrial enterprises, including electric networks with a voltage of up to 1 kV, as well as 6, 10 kV and higher, are often solved separately. It triggers an irrational use of existing voltage control devices, underutilization of the installed capacity of compensating devices, and affects the voltage control in the electrical networks of the power supply organization. Since voltage management and compensation modes of reactive power are inseparable, they can be correctly determined only with the use of an integrated approach based on technical and economic criteria and taking into account technical requirements and local conditions. This article analyzes the mutual influence of voltage control and reactive power compensation modes in the electrical networks of industrial enterprises from the point of view of ensuring the quality of electricity and minimizing load power losses. The method and results of calculations (on the example of a specific industrial facility) for determining voltage deviations and losses in the electrical network as well as for selecting parameters for voltage control and reactive power compensation are presented. Due to the close relationship of these modes that affect all voltage levels, the effectiveness of measures cannot be ensured without the use of multifunctional devices for controlling the equipment of transformer substations.

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