Study On Bilateral Linear Switched Reluctance Power Generation System

With shortages of fossil resources and air pollution from them becoming increasingly prominent, wave power, as a renewable energy, has attracted some scientists and researchers' attention. Currently, the traditional wave energy generation systems generate electricity mainly through three processes: the energy capture, transfer and conversion. Energy capture process is mainly realized through approaches of wave concentration, resonance, etc. The transferring process transfers the low-speed mechanical energy to the high-speed mechanical energy by adopting the mechanical, hydraulic and other transmission mode, which is an essential method of conventional means, and the conversion process mainly uses a rotating electrical generator to complete the conversion of electrical energy. However, these systems are of low efficiency because of the introduction of the intermediate devices that can inevitably lead to energy losses. Besides, these systems could reduce the reliability, increasing the overall cost of electricity. In addition, wave energy can be characterized by low speed, destructivity, random movement features, thus reducing the longevity of the generation systems.Using direct-drive power technology can be a good way to overcome these disadvantages of traditional methods. However, conventional linear motors are complex, expensive and low reliable. Linear switched reluctance motor has a rugged structure and good robustness, which is suitable for the complex environment of wave energy utilization. This paper focuses on linear switched reluctance motor and a low speed direct-drive power control technology, and launches a comprehensive study from theory to practice, from simulation to experiment. The main contents are as follows:1. An optimized bilateral asymmetric linear switched reluctance generator(ABLSRG) is obtained by using the finite element method, and the simulation results show that the motor magnetic circuit structure has been improved, compared with non-optimized reluctance motor. The machine has a larger and more stable force output, with the power density of the motor significantly improved after optimization.2. To better study the power generation system's characteristics, the finite element software Maxwell and multi-domain system simulation software Simplorer are combined to build a co-simulation model of power generation system. The main factors affecting the effectiveness of power generation are analyzed in detail, providing theoretical support for future implementations of the voltage closed-loop control.3. A simulation platform for ABLSRG wave power generation system based on d SPACE platform is built, and a voltage close-loop control experiment of power generation is carried out. By using the current pulse width moderation(PWM) combining PID control and adaptive closed-loop control, experimental results show that the adaptive controller can improve the voltage accuracy.