The Characteristic Analysis And Main Magnetic Field Simulation Of Magnetically Controlled Saturated Reactor

Owing to the vast territory of China, the distribution of resource and the distribution ofthe demand for electric energy are contradictory. With the increase of economy, thecontradictions are becoming more and more highlighted. In order to meet the demand ofelectricity and make the fullest use of our country’s abundant material resources, transmittingthe power energy with large capacity and long distance to the power load center city hasbecome one of the major principles in the construction of China’s energy. Compared with theExtra-high Voltage, Ultra-high Voltage takes the evident advantage with it’s the distance oftransmission, the capacity of transmission, limiting short circuit current and reducingtransmission line loss. While the higher the voltage level is, the higher the requirements are.The voltage stability mainly depends on the balance of the system reactive power. Reasonableeffective voltage control and reactive power compensation not only are able to ensure thequality of voltage, but also improve the stability and safety of the power system operation,which hold the capacity to make the utmost of the economic effectiveness. Magneticallycontrolled saturated reactor can rapidly and smoothly adjust reactive power with the changingof power flow, which keeps voltage fluctuation in the range of stable operation.Magnetically controlled saturated reactor is designed on the basis of the principle ofmagnetic bias adjustment, whose distribution of the main magnetic field and jobcharacteristics are significant technical indexes to text the design rationally magneticallycontrolled saturated reactor. Moreover, the distribution of the main magnetic field is the basisto calculate the work characteristics. The control characteristic of magnetically controlledsaturated reactor and the volt-ampere characteristics of magnetically controlled saturatedreactor directly response to the adjusting process and the working state. The analysis of theharmonic characteristics has the guidance influence on the analysis of the effect of controllablereactor on Ultra-High Voltage grid. This paper calculates the magnetic field distribution of theUltra-High Voltage magnetically controlled saturated reactor and its operating characteristicsby the finite element simulation on the basis of existing research. Because the complexprototype is failed to make, it is impossible to verify the accuracy of the simulation results.This paper adopts two low grade magnetically controlled saturated reactor using the same method of controlled reactor simulation analysis so as to ensure that the simulation calculationof the Ultra-high Voltage magnetically controlled saturated reactor are accurate. Thesimulation results show that the Ultra-High Voltage magnetically controlled saturated reactormeet the design requirements which has approximate linear and smooth control characteristiccurve and piecewise linear volt-ampere characteristic curve, so it can be done in furtherresearch and prototype experimental study. Three-phase Ultra-High Voltage magneticallycontrolled saturated reactor can effectively eliminate the third harmonic and greatly reduceharmonic distortion rate of controlled reactor and fifth and seventh harmonic are high whichcan be seen through the harmonic characteristic analysis. So it is necessary to take measures tosuppress the harmonic impact on power grid in front of the grid.