基于单片机和CPLD的同步发电机自动准同期装置设计

Design of generator automatic quasi-synchronizing device based on microprocessor and CPLD

同步发电机的并列操作是电厂的一项重要而频繁的操作。为了避免并列时冲击电流过大,要求并列时断路器两侧电压的幅值差、频率差和相角差都在允许范围内,否则对发电机进行相应的调频、调压控制。对一种基于AT89S52单片机和复杂可编程逻辑器件(CPLD)的同步发电机自动准同期装置进行了研究。硬件结构分为8个模块;采用结构化编程思想进行了软件设计。该装置结构简单,可靠性高,便于维护,实现了自动测频、测压和测相角,并实现了"智能"调频、调压;同时提供了便捷的人机交互界面,使得参数设置简单灵活。

Generator synchronization is an important and frequent operation in power station. In order to avoid great impact current,the differences of voltage magnitude,frequency and phase between two sides of the breaker must be in the range permitted,otherwise the frequency and magnitude of generator voltage should be adjusted. A generator quasi- synchronization device based on AT89S52 microprocessor and CPLD（Complex Programmable Logic Device） is studied. Its hardware includes eight modules and its software is structuralized. The device structure is simple,its reliability is high and the maintenance is easy. It measures the voltage magnitude,frequency and phase automatically and realizes intelligent frequency and voltage adjustments. Convenient HMI makes the parameter setting simple and flexible.