scholarly journals Thermographic Measurement of the Temperature of Reactive Power Compensation Capacitors

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5736
Author(s):  
Krzysztof Dziarski ◽  
Arkadiusz Hulewicz ◽  
Grzegorz Dombek
Keyword(s):  
Power Consumption ◽  
Reactive Power ◽  
Capacitor Bank ◽  
Reactive Power Compensation ◽  
Observation Point ◽  
Point Of View ◽  
Contact Method ◽  
Thermographic Camera ◽  
Cylindrical Capacitor ◽  
Thermographic Measurement

An excessive increase in reactive power consumption is unfavorable from the point of view of a power system. For this reason, devices compensating reactive power consumption are used. The capacitor is one such device. Capacitors must be tested regularly during their exploitation. One of the activities that should be performed is testing the degree of heating of the cells of a capacitor bank. Thermography can be used to perform such tests. This non-contact method has its limitations. Due to the angular emissivity and the change in the distance between the lens and the object under observation, the temperature measured with a thermographic camera may differ from the actual temperature. This phenomenon is visible on cylindrical capacitor cases. Consequently, depending on the location of the observation point on the capacitor case, the result of the thermographic temperature measurement may be different. To investigate this phenomenon, experimental work has been undertaken.

Analysis on Unbalance Protection of SCB

2013 ◽  
Vol 341-342 ◽  
pp. 1423-1428
Author(s):  
Xiao Ping Xiong ◽  
Jing Jie Hu ◽  
Qiang Fu
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Simulation Analysis ◽  
Capacitor Bank ◽  
Relay Protection ◽  
Reactive Power Compensation ◽  
Single Star ◽  
Capacitor Banks ◽  
Shunt Capacitor ◽  
Theory Calculation

Shunt capacitor is a main measure to reactive power compensation of power system, which has the advantages of flexibility and economy. In order to guarantee the safety of shunt capacitor, the methods for protecting against over-voltage, under-voltage, over-current and unbalance in circuits according to the different operation modes are used. This paper in detail introduces unbalance protection ways under different connection modes of capacitor group. It is analyzed and calculated that the unbalanced current and voltage with the effects of fault capacitor units, components and fuses on capacitor bank as well through a case of unbalance computation of shunt capacitor banks (SCB) of ungrounded single star with external fuse. It is indicated by PSCAD simulation analysis that the result of theory calculation is the same as the simulation, which provides theory basis of setting the tripping point and alarm point of relay protection.

scholarly journals Optimization of the selection of sections in the distribution line considering reactive power compensation

2020 ◽  
Vol 216 ◽  
pp. 01070
Author(s):  
Ivan Bandurin ◽  
Vladimir Ivanov ◽  
Igor Kozyrev ◽  
Vladimir Korobov ◽  
Alexey Khaimin ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Power Consumption ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
End Users ◽  
Active Power ◽  
Distribution Line ◽  
The Mathematical Model ◽  
Selection Of

Today, the increase in reactive power consumption far exceeds the increase in active power consumption. Due to the increasing demands of the end-users for the quality of the supply of electricity, the problem of joint selection of rational sections and places of installation of reactive power compensation in the distribution line becomes relevant. A mathematical model and algorithm allowing such a choice are proposed. The mathematical model can be used both in the design of new lines and in the reconstruction of existing lines. An example is given.

The analysis of electromagnetic processes in reactive power compensation unit with variable inductance

2017 ◽  
pp. 298-306
Author(s):  
Aleksander Marykyn ◽  
Vasiliy Myroshenko
Keyword(s):  
Reactive Power ◽  
Capacitor Bank ◽  
Practical Importance ◽  
Alternating Current ◽  
Reactive Power Compensation ◽  
Structural Variations ◽  
Control Range ◽  
Starting Current ◽  
Electric Traction ◽  
Variable Inductance

Objective: To analyze transient processes when activating reactive power compensation unit with variable inductance and load bounce in electric traction alternating current network. To determine reactive power control range for possible structural variations of a unit. To choose the most power efficient variant of mutual connection of controlled reactor and capacitor bank with uncontrolled capacity in reactive power compensation unit. To make a conclusion, concerning feedback device application in control system. Methods: Connection diagrams of a unit to an alternating current monophase network. Mutual connection diagrams of controlled reactor and capacitor bank were chosen. Structural variations’ control range analysis of reactive power compensation unit was conducted. In MATLAB Simulink software package, simulation of different bucking out system circuitry was fulfilled. Simulation of compensation unit functioning was carried out for one variant with load bounce in electric traction. Results: It was established that, in case of series connection of controlled reactor and capacitor bank, control range may comprise no more than 15 % of nominal capacity. Starting current of a unit reaches twofold value. Parallel connection makes it possible to control reactive power in a broad band. Starting current in this case reaches fourfold excess of value. It is suggested to use uncontrolled reactor successively with capacitor bank as an additional unit. Such a variant makes it possible to reduce starting current and simultaneously provide filtration of the third current harmonics. Practical importance: A series-parallel variant of compensation unit circuitry seems to be the most perspective for application in electric traction alternating current network.

scholarly journals Power factor improvement for a three-phase system using reactive power compensation

2021 ◽  
Vol 24 (2) ◽  
pp. 715
Author(s):  
Majid Ali ◽  
Faizan Rashid ◽  
Saim Rasheed
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Capacitor Bank ◽  
Reactive Power Compensation ◽  
Phase System ◽  
Automatic Correction ◽  
Binary Coding ◽  
Three Phase ◽  
Electrical Loads ◽  
Power Factor Improvement

For all industrial and distribution sites, the lagging power factor of electrical loads is a common problem. In the early days, it was corrected manually by adding the capacitor banks of certain values in parallel. Automatic power factor correction (APFC) using a capacitor bank helps to make a power factor that is close to unity. It consists of a microcontroller that processes the value of the power factor to enable the system and monitor the power factor if it falls below (0.77) from the specified level. This paper presents the automatic correction of the power factor by adding the capacitors banks automatically of the desired value in a three-phase system in the form of binary coding (0-7). The main purpose of this system is to maintain the power factor as close as to unity, for the experimental case, it is set to (0.93) which helps to decreases the losses and ultimately increase the efficiency of the system.

Influence of Harmonic on the Protections of Capacitor Bank

2013 ◽  
Vol 291-294 ◽  
pp. 2543-2548
Author(s):  
Xu Cen ◽  
Shu Ming Liu ◽  
Qiong Lin Li ◽  
Shun Tao
Keyword(s):  
Reactive Power ◽  
Capacitor Bank ◽  
Reactive Power Compensation ◽  
Overcurrent Protection ◽  
Overvoltage Protection

This paper introduces the capacitor bank equipped with overvoltage protection and overcurrent protection. Then with a group of capacitor for reactive power compensation as the research object, this paper analyses the influence of harmonic to the two protection modes when the electromagnetic, static or microcomputer relay are applied.

Reactive Power Compensation and Configuration of Wind Farm

2012 ◽  
Vol 588-589 ◽  
pp. 563-566 ◽  
Author(s):  
Shao Bo Li ◽  
Lin Chuan Li ◽  
Lei Zhang ◽  
Qian Sun
Keyword(s):  
Wind Turbine ◽  
Equivalent Circuit ◽  
Wind Farm ◽  
Reactive Power ◽  
Voltage Drop ◽  
Capacitor Bank ◽  
Optimization Method ◽  
Reactive Power Compensation ◽  
Load Flow ◽  
Active Power

Wind turbine absorbs reactive power while generating active power. Seriously, it causes voltage drop or even voltage collapse. It is needed to compensate reactive power. In this paper, a combination of capacitor bank and SVC is used in wind farm. Equivalent circuit of two kinds of wind turbine is described firstly. Then, equation of reactive power and active power is derived. Then an optimization method is used to calculate capacity of capacitor bank and SVC. Finally, load flow of IEEE14 system with a wind farm connected to it is calculated to verify the effect of reactive power compensation.

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