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分析了Ｉ２Ｃ总线的结构原理及技术特性，结合电力系统控制的特点，介绍了一种由Ｉ２Ｃ总线结构和并行总线扩展结合设计的微机控制系统。该系统与单一并行总线所构成的系统比较，硬件结构大大简化了；Ｉ２Ｃ总线在软件设计上采用标准模块方式，提高了软件设计的灵活性和系统运行的可靠性，方便了系统的进一步扩展。
The structure principle and technical characteristics of I2C bus are analyzed. Combined with the characteristics of power system control, a microcomputer control system based on I2C bus structure and parallel bus expansion is introduced. Compared with the system consisting of a single parallel bus, the hardware structure is greatly simplified. The I2C bus uses standard modules in software design, which improves the flexibility of software design and the reliability of system operation, and facilitates the further expansion of the system.