| Permanent magnet(PM) synchronous generator has the advatange of high power density and efficiency due to the PM excitation. Therefore, it exhibits the potential in applications of multi-source power system. As we know, the traditional multi-source power system mostly uses one power converter to control one input power source and all the conveters are in parallel on the bus finally. This structure maks the control of the power source independently and without interference. So the electrical performance of the structure in which PM generator is merged into the system by a rectifier has no difference with independent generation power system. And it has no benefit to solve the problem that PM generator has narrow speed range and is difficult to improve the speed in multi-source power system. In addition, the number of converter is redundant in the traditional multi-source power system which reduces the system integrity and stability.Therefore, this paper gives an open-winding PM generator power system. And a new battery current regulation algorithm is developed on it. The algorithm controls two power sources(generator and battery) in the system with only one converter. The output voltage and battery current control is also realized. The working principle of the control algorithm is given and it verified correct by the simulation and experiment in the paper, which provides a new idea for the application in the multiple input energy source power system.In order to verify the performance of the proposed power system, this paper does a comprehensive comparison to an open-winding hybrid excited generator power system and a traditional PM generator power system in parallel. The voltage and power equation is deduced in the paper. And the speed range, load range and the minimum battery voltage the system needs is analyzed by the mathematical model. In addition, the correctness of the mathematical model is proved by experiment of the open-winding PM generator power system. This part provides the theory basis for the application of the three systems in different occasions of multi- source power system. |
