The Electrical Design Of Dynamic Reactive Power Compensating Device And The Power Quality Of Its Steady-state Analysis

The rapid development of the field of new energy power generation and the merging of a growing number of high-power, non-linear load, lead to more and more attentions to power quality problems of power system. According to the running state of modern power system and power quality characteristics, firstly, to discuss the basic concepts of power quality which are definition, content, characteristics, influence factors, executive standard and so on, to analyse the influences of power quality of power system under the disturbances, and modern power system’s requirements of power quality, to demonstrate the importance of reactive compensation and dynamic detection.Secondly, taking a test platform device of20Kvar linear capacity and10Kvar nonlinear and10KW load as an example, this thesis completes electrical circuit design and physical device selection of distribution cabinet, control cabinet, SVC cabinet, FC cabinet and the load cabinet, from the perspective of electrical engineering. The reactive compensation test platform device can complete the real-time simulation of various phenomena of load change in the laboratory, and achieve the detection and analysis of power quality phenomena to provide the basis for reactive power compensation adjustment of power system.Finally, this thesis calculates voltage and voltage deviation by true RMS method in the test platform, gives the calculation process, and demonstrates the advantages of high accuracy of true RMS method in the detection and calculation. To analyze frequency and frequency deviation, it uses the classical FFT algorithm and confirms the analysis by MATLAB simulation and the experiments of the test platform. To calculate three-phase unbalance, it uses symmetric method. And it uses the tests of many nonlinear and unbalanced loads to compare with the calculated results. The results of simulation and experiment provide basic research of power quality and propose some new requirements for the design of SVC compensation device.This thesis are the rational use of tools such as charts for comprehensive analysis, summary and contrast, making the discussion intuitive, and the use of a large number of experimental results to compare with the theoretical analysis results, together with the necessary text, to make the research work more comprehensive and more vital, and to avoid making the article empty, fatigue and one-sided with the simulation and text simply.