适用于电力电子系统分布式控制的自动转发式环网通信策略

摘要

高速环网通信技术是电力电子系统实现模块化与标准化的重要手段之一，传统的转发式环网通信策略消耗时间较长，切换式环网虽然消耗时间缩短，但会在串行序列中引入乱码。针对这一问题，提出一种实现电力电子系统分布式控制的自动转发式环网通信策略，该通信策略省略了繁琐的指令转发过程，大幅度缩短了完成一次采样过程所消耗的时间，提高了环网通信的性能。分析了传统转发式环网通信策略与自动转发式环网通信策略的时间模型，并对两种环网通信策略完成单次采样过程的通信时间进行了定量计算。实验结果验证了所提通信策略的有效性和可靠性。%The high speed ring network is one of the key methods for power electronic systems to achieve modularization and standardization.The conventional communication strategy of retransmit ring network takes a very long time.The time taken by switchable ring network is relatively short,but it will introduce error data in the serial codes.To solve this problem,this paper proposes an communication strategy of auto-retransmit ring network for distributed control of the power electronic system.Most of the command retransmit process is omitted in this strategy.The time taken in one sampling period is decreased a lot and the ring network performance is increased a lot.The time models of conventional and auto-retransmit ring network strategies are both analyzed.The communication time in one sampling period is calculated for both strategies.The experiment results have verified the effectiveness and reliability of the proposed auto-retransmit ring network strategy.