Study And Development Of Controllable Reactor Based On Ferrite Orthogonal Core

The controllable reactor is an important power equipment, performing a vital role in improving power quality, reducing power loss and enhancing the stability of the power system. The controllable reactor can be divided into three kinds:the mechanically controlled type, the thyristor controlled type and the magnetically controlled type. The magnetically controlled reactor(MCR)has been much used for its high level voltage withstand and simple control characteristics. The study of MCR has an early start, the magnetic valve controllable reactor(MVCR) is the most matured product of it and has been preliminarily applied in the field of high voltage and ultra high voltage(UHV). However, there are still some problems in practical manufacturing and application, such as the complicating core structure, low control accuracy, high harmonic content, slow response, large noise, etc.Ferrite orthogonal core controllable reactor(FOC-CR) is one of the magnetically controlled reactors, having attracted more and more domestic and foreign scholars because of its simple core structure, low harmonic content and approximately linear control characteristics. It overcomes some disadvantages of MVCR, thus showing the better prospects for development. And the research of FOC-CR is also supported by Science and Technology Department Fund of Zhejiang Province (LY13E070004).This paper studies the basic structure and working principle of FOC-CR, establishes its equivalent magnetic model and the basic mathematical equations. Based on this, the paper gives a modeling method of FOC-CR though assumption of MMF-Flux relation in a form of odd polynomial. the simulation model is established in Matlab/Simulink by using S-function. The method is verified by contrasting the test result of simulation model and experimental prototype. It provides a reference for the optimal design of FOC-CR. In practical engineering applications, the paper proposes an method of dynamic reactive power compensation(RPC) based on FOC-CR. Its control strategy is studied; the overall design of the experimental RPC equipment is formulated. Finally, the paper presents a n experimental single-phase RPC equipment, which is composed of DSP(TMS320F2812) as master control chip, FOC-CR and FC filter as an unit of compensation. The design and development of relating hardware and software are also given in the article. User can control the output reactive power through Matlab/GUI interface on PC. Experimental result shows that the RPC equipment has fast response, high control accuracy, laying a basis for further development of large capacity RPC system both experimentally and theoretically.