含通信时延的微电网分布式二次协调控制

Distributed Secondary Coordinated Control of Microgrid with Communication Delays

  • 摘要: 在微电网二次控制中,分布式控制方法因其高可靠性,且容易实现“即插即用”,受到了广泛关注。然而在实际运行中,物理距离相隔较远的分布式电源(Distributed generation,DG)间会产生通信时延,使得各DG很难达到同步,严重时会影响系统的稳定性。基于多智能体一致性算法实现了微电网分布式二次协调控制,利用Lyapunov函数分析了系统的稳定性,并设计了分布式时延控制策略。现有研究在设计二次协调控制算法时,仅利用DG电压、频率的输出结果值作为参考,不能反映两者的变化规律。充分考虑DG的电气特性,在二次协调控制中基于状态空间法引入了DG小信号模型,并给出了分布式时延控制器参数的调节步骤。仿真结果验证了所设计的一致性协议的有效性,并揭示了控制参数和时延参数对系统输出的影响规律。

     

    Abstract: In the secondary control of microgrids, distributed control methods have received widespread attention due to their high reliability and easy implementation of “plug and play”. However, in practical operation, distributed generation(DG) with far physical distances can generate communication delays, making it difficult for each DG to achieve synchronization, which can seriously affect the stability of the system. Distributed secondary coordinated control of microgrids is implemented based on multi-agent consensus algorithms. The stability of the system is analyzed using Lyapunov functions, and a distributed delay control strategy is designed. Existing research only used the output values of DG voltage and frequency as a reference when designing secondary coordinated control algorithms, and both the variational laws cannot be reflected well. The electrical characteristics of DG is fully considered. The DG small-signal model is introduced based on the state space method in the secondary coordinated control, and the adjustment steps of the distributed time delay controller parameters is given. The simulation results verified the effectiveness of the designed consensus protocol, and revealed the influence of control parameters and delay parameters on the system output.

     

/

返回文章
返回