Research on a Dynamic Reactive Power Compensation Method of Composite Power Load

2014 ◽  
Vol 602-605 ◽  
pp. 2840-2843 ◽  
Author(s):  
Qi Jian Cheng ◽  
Jing Chen ◽  
You Xin Yuan ◽  
Xue Song Zhou ◽  
Shi Jie Deng
Keyword(s):  
Topological Structure ◽  
Reactive Power ◽  
Control Method ◽  
Reactive Power Compensation ◽  
Compensation Method ◽  
Compensation Control ◽  
Power Load ◽  
Compensation Device ◽  
Reactive Power Compensator

A large number of inductive loads need the reactive power, and the amount of the reactive power compensation is different in a state of work. The traditional static reactive power compensator is difficult to meet the needs of the reactive power compensation for the composite load reactive. Therefore, a dynamic reactive power compensation method of the composite power load is proposed in this paper. The following works have been done in the study: principle of dynamic reactive power compensation control method, topological structure of dynamic reactive power compensation device, and implementation of the dynamic reactive power compensation control method.

The Application of S7-200 PLC Reactive Compensation Device in Small Substation

2012 ◽  
Vol 479-481 ◽  
pp. 1476-1480
Author(s):  
Qing He Chu ◽  
Wen Si Cao ◽  
Zhen Nie
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
High Reliability ◽  
Reactive Power Compensation ◽  
Control Device ◽  
Reactive Compensation ◽  
Reconstruction Project ◽  
Compensation Device ◽  
And Control

In the present rural power grid reconstruction project ,according to the problems of capacitor reactive power compensation in rural small substation. Take a small substation for instance, according to its operation and control method, set the criterion of the capacitor bank switching. A new high reliability, flexible reactive power compensation control device based on s7-200 PLC is designed. It plays an important role in improving the power supply , guaranteeing the quality of voltage, reducing the loss of rural power gid.

The New Type of Reactive Power Compensation Device under Direct Current Control and Indirect Current Control

2013 ◽  
Vol 694-697 ◽  
pp. 826-829
Author(s):  
Yan Han ◽  
Xiaoming Zhang ◽  
Pan Pan Yang
Keyword(s):  
Direct Current ◽  
Reactive Power ◽  
Control Method ◽  
Reactive Power Compensation ◽  
Current Control ◽  
Instantaneous Reactive Power Theory ◽  
Direct Current Control ◽  
Indirect Current Control ◽  
The Difference ◽  
Compensation Device

This Paper Briefly Describes the Basic Principle of Reactive Power Compensation and Introduces the Indirect Current Control and Direct Current Control Method Based on Instantaneous Reactive Power Theory. Compare the Two Control Theory and Use the MATABLE Simulink Environment to Analyzing the Difference between the Two Methods

A Dynamic Reactive Power Compensation Method of Super High-Power and High-Voltage Motor

2014 ◽  
Vol 602-605 ◽  
pp. 2828-2831 ◽  
Author(s):  
Yi Fei Wang ◽  
You Xin Yuan ◽  
Jing Chen ◽  
Qi Jian Cheng
Keyword(s):  
High Voltage ◽  
High Power ◽  
Reactive Power ◽  
Industrial Applications ◽  
Reactive Power Compensation ◽  
Compensation Method ◽  
The Novel ◽  
Parameter Setting ◽  
Compensation Device ◽  
Novel Design

According to the low power factor and low running efficiency, a dynamic reactive power compensation method of the super high-power and high-voltage motor is proposed in this paper. The following works have been done in the study: topology of the dynamic reactive power compensation device; principle of the dynamic reactive power compensation method; control system of the dynamic reactive power compensation device; implementation of the dynamic reactive power compensation method. The amount of reactive power compensation can be adjusted smoothly and dynamically in the process of the super high-power and high-voltage motor soft-starting. The research of this paper has laid a theoretical foundation for this compensator in industrial applications. The novel design is characterized by flexible parameter setting, excellent soft starting performance of the super high-power and high-voltage motor and bright prospect in application.

scholarly journals Converter Compensation of Reactive Power Consumed by the Induction Generato

2021 ◽  
Vol 57 (1) ◽  
pp. 64-79
Author(s):  
Jarosław Tępiński
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Power Grid ◽  
Reactive Power Compensation ◽  
Induction Generator ◽  
Power Electronic ◽  
Induction Generators ◽  
Hydropower Plants ◽  
Reactive Power Compensator ◽  
Power Electronic Converter

Purpose: The purpose of the article is to present a reactive power compensation for small hydropower plants with an induction generator. The classic compensation with capacitors is discussed and its improvement is proposed. Instead of capacitors, a three level power electronic converter connected in parallel to the induction generator can be used to provide reactive power compensation. The purpose of the paper is to present the developed structure of an active compensator and its control method. The developed control method was verified on a laboratory stand. The project and the methods: As part of research, an active compensator was built as a three-level power electronic converter in topology with Neutral Point Clamped. Laboratory tests of a converter compensator were carried out on a stand equipped with an induction generator with a power of 7.5 kW. Laboratory system measurements were made using a power analyzer and an oscilloscope. Results: A control structure of an active compensator based on a voltage-oriented method was presented and discussed. The operation of the con- verter compensator has been verified on a laboratory stand equipped with a 7.5 kW induction generator. The compensator current reduces the reactive (inductive) component of the current consumed from a power grid to a value equal to zero. The reactive power compensator ensures that the tgφ power factor is maintained at a set value of zero, which corresponds to the total compensation of inductive reactive power consumed by an induction generator working in a hydropower plant. Operation of the active compensator did not cause a significant increase in the harmonic content in the current consumed from the power grid. Conclusions: The paper presents the issues regarding reactive power compensation in hydropower plants with induction generators. Commonly used capacitor compensation has been covered and as a result, it is proposed to replace it with power electronics converter compensation of reactive power connected in parallel induction generators. Active compensator provides compensation for the entire reactive power consumed by the induction generator. The use of the converter compensator of reactive power significantly contributes to the reduction of costs for reactive power incurred by the owners of hydropower plants. The reactive power compensator also has a positive impact on the operation of the entire power grid, power losses from the reactive component of the current on the impedances of power grid components are limited. Keywords: renewable source of electricity, reactive power, active compensator, induction generator Type of article: original scientific article

The Design of Dynamic Reactive Power Compensation Device on Segmented Control Mode

2013 ◽  
Vol 321-324 ◽  
pp. 1333-1336
Author(s):  
Xiu He Lu ◽  
Chang Shuo Li ◽  
Qi Lin Li
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Perceptual Load ◽  
Control Method ◽  
Metallurgical Industry ◽  
Reactive Power Compensation ◽  
Control Mode ◽  
Loop Control ◽  
Distribution Station ◽  
Compensation Device

For metallurgical industry perceptual load fluctuations large, and distribution station bus power factor low, and power loss high problems, based on reactive power compensation principle of apparent power does not variable, and used SVC structure forms, has made sectional type compensation control mode, and based on power factor of closed-loop control method, has researched the dynamic reactive power compensation device, by the check of practical run, the feasibility has been proved of the control method, and it has a clear compensation effect and wide practical range and other outstanding features.

The Improved Five-Zone Control Theory with Considering Dynamic Reactive Power Compensation Device

2014 ◽  
Vol 672-674 ◽  
pp. 1100-1104
Author(s):  
Lin E Ge Qi ◽  
Di Chen Liu ◽  
Jun Wu
Keyword(s):  
Control Theory ◽  
Reactive Power ◽  
Control Method ◽  
Control Object ◽  
Good Control ◽  
Reactive Power Compensation ◽  
Control Effect ◽  
Zone Control ◽  
New Type ◽  
Compensation Device

The “five-zone” control theory is a kind of Reactive power integrated control theory With the device as the control object directly which is different from the traditional “nine-zone” theory . It has high control precision and good control effect and has a broad application prospect. However, with the appearance of New type of dynamic reactive power compensation device, the basic five-zone control theory can’t meet the new demand In this paper, on the basis of the traditional "five-zone"theory, considering the dynamic reactive power compensation device, the traditional five area boundary is improved. Based on the improved chart on the basis of the five area, defines a new type of five area chart control method, and finally verifies “improved five-zone” control method by simulation.

Study on Reactive Power Compensation Control of STATCOM Based on MMC

2014 ◽  
Vol 530-531 ◽  
pp. 1022-1025
Author(s):  
Yan Xie ◽  
Ya Ne Liao ◽  
Hong Xie
Keyword(s):  
Reactive Power ◽  
Power Level ◽  
Response Speed ◽  
Reactive Power Compensation ◽  
Current Control ◽  
Control Mode ◽  
Compensation Control ◽  
Control Response ◽  
In Series ◽  
Level Converter

This paper introduced a new modular multi-level converter (MMC), which could enhance the voltage and power level by sub-converter modules in series and was easy to extend to any level of output. Its structure and working mechanism were described. By analyzing the performance of STATCOM based on MMC working conditions in the reactive power compensation, this paper studied compensation control theory in reactive changing conditions. To obtain compensation control response speed faster and better compensation effect, a compensation control strategy was proposed based on direct current control mode. The simulation results show the strategy has a better tracking precision and response speed for the reactive power compensation.

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