549 / 2017-05-14 00:35:52

Design and Optimization of Energy-saving Wind Power Grid-connected Contactor Based on Nano Two-phase Composite Magnetic Materials

14136,386,13577,14137

In recent years, with the extensive application of the integrated automation and smart grid, the demand for energy saving, reliability and environmental friendliness of power equipment is getting higher and higher, and the traditional contactor has been unable to meet the needs of modern control. There are many deficiencies in the use process, such as closing the coil to maintain long-term power to keep the coil temperature is too high easily lead to damage to the coil, a large number of losses concentrated in the iron loss caused by a serious waste of energy. In addition, the vibration and noise of the iron core can not be eliminated and so on.

In this paper, a design and optimization scheme of energy-saving wind power grid contactor based on nanometer two-phase composite magnetic material is proposed by using nano two-phase composite magnetic material, which has high remanence and hard magnetic coercive force at the same time. The composite magnetic material is added into the stator to change the size of the closing coil and the core, and design the starting circuit that matches the remanence retention electromagnetic system, so that the contactor can be disconnected from the power supply after reliable pull-in, then only rely on nano two-phase composite remanence to maintain its holding state. At the same time, through the establishment of finite element simulation model, and compared with the traditional contactor to analyze the dynamic and static characteristics, and then optimize the overall design. Finally, the prototype was tested and the validity of the design was verified by experiments. In a word, the scheme makes the wind power grid connected contactor realize the characteristics of energy saving, noiseless operation, simple structure and high reliability which has good practical significance and market prospect.