【作者】 李芳灵；

【导师】 向农；

【作者基本信息】 武汉大学 ， 电力电子与电力传动， 2004， 硕士

【摘要】 发电厂中，发电机组的投入运行操作是经常进行的操作。在系统正常运行时，随着负荷的增加，要求备用发电机迅速投入系统，以满足用户用电量增长的要求；在系统发生事故时，会失去部分电源，要求将备用机组快速投入电力系统制止系统崩溃。这些情况均要进行同期操作，将发电机组安全可靠、准确迅速地投入，确保系统的可靠、经济运行和发电机的安全。在发电厂中，担当这一重任的设备是同期装置。同期装置是发电厂的重要装置，其直接影响着发电机的安全与寿命，对节约能源也是不可忽视的。现在绝大多数电厂采用的都是微机型自动准同期装置，其性能是手动同期和模拟同期装置无法比拟的。高性能微机型自动准同期装置的广泛应用不仅给电厂运行人员进行同期操作带来了极大的方便，也可靠的保证了发电机组并网过程的安全，保证了电力系统的安全，并大大地提高了效率，为社会带来了巨大的经济效益。 本论文的主题是基于DSP芯片的一种新型微机自动准同期装置的研究和开发。详细阐述了最新型微机自动准同期装置在电力系统安全可靠运行中的地位，阐述了同步系统的原理，并分析了过去手动同期方法以及模拟同期装置的严重不足。文中根据对该装置开发的实际过程，对该装置的硬件，软件设计方法、依据进行了说明和讨论。该装置用同期测试设备进行了测试，测试结果表明该装置能够在并列点(断路器)两侧压差，频差，频差变化率满足条件的情况下捕捉到第一次合闸时机，准确地将待并侧最小影响地投入系统。更多还原

【Abstract】 It is a frequent performance of the synchronization of generators in power plants. Spare generators are required to be rapidly plunged into the system to meet the customer’s increasing demands caused by electric load’s rising as the system is in good order, and to stop system’s breakup in result of power supply’s losing when faults occur. In the two cases, the synchronizing course must be dependable, safe and rapid to ensure generators safe and system running reliably and economically. In power plants, quasi-synchronizing devices assume the responsibility. These devices directly influence generators’ safety and life expectancy. Apart from this,it is also not ignored to economize energy. At present,most power plants adapt microprocessor-based, automatic quasi-synchronizing devices whose performances greatly exceed handraulic and analogue devices. With these new high performance devices widely used,it is convenient to plant operators in synchronizing operations ,and largely guarantees safety, brings up huge economic utility.The theme of the paper is researching and developing of a new kind of automatic quasi-synchronization device based on DSP chip. The paper has elaborated the important status of microprocessor-based automatic quasi-synchronization device in power system,exhausted the principles of synchronism, analysed the deficiency of handraulic and analogue devices. According to the real researching course,the paper has described the hardware and software designing ways. We have tested our device with equipment and the testing result is satisfying. In a synchronization course ,when the voltage-difference,the frequency-difference,the rate of change of frequency-difference comply with the requirements ,our device will grasp the first synchronization opportunity and plunge the generator into system with a smallest impact.更多还原