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Self-adaptive inertia control of DC microgrid based on fast predictive converter regulation

机译：基于快速预测变流器调节的直流微电网自适应惯性控制

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摘要

To solve the problem of low inertia in DC microgrid and enable the distributed units to provide adaptive inertia support for the system under disturbance, this study proposes a novel adaptive inertia control strategy for DC microgrid combined with fast predictive converter control. In this strategy, adaptive coordinated inertia control of wind power system, AC power grid and energy storage system of the microgrid is designed according to the characteristics of corresponding micro-sources. Therefore, inertial response of the DC microgrid under disturbance is improved through the regulation of controllable inertia coefficient of each converter. In addition, to avoid control hysteresis and adjustment error, a fast converter local control method based on model predictive approach is proposed to cooperate with the rapid inertia adjustment strategy. To verify the effectiveness of the proposed adaptive inertia control method based on model predictive approach, contrastive simulations are conducted using the proposed control strategy and the traditional control strategy separately based on MATLAB/Simulink. The results show that the proposed control method can effectively improve the transient response to disturbance of the system and guarantee the stability of DC bus voltage as well as the output power quality on AC side of grid-connected converter.
机译：为解决直流微电网惯性低的问题，使分布式系统能够为扰动下的系统提供自适应惯性支持，提出了一种结合快速预测变流器控制的直流微电网自适应惯性控制策略。该策略根据相应微源的特点，设计了风电系统，交流电网和微电网储能系统的自适应协调惯性控制。因此，通过调节每个转换器的可控惯性系数，可以改善直流微电网在扰动下的惯性响应。另外，为避免控制滞后和调节误差，提出了一种基于模型预测的快速变流器局部控制方法，以配合快速惯性调节策略。为了验证基于模型预测方法的自适应惯性控制方法的有效性，分别使用所提出的控制策略和基于MATLAB / Simulink的传统控制策略进行了对比仿真。结果表明，所提出的控制方法可以有效地改善对系统扰动的瞬态响应，并保证直流母线电压的稳定性以及并网转换器交流侧的输出功率质量。

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