Direct-current micro-grid non-communication bus voltage recovery control method
一种母线电压、直流微网的技术,应用在直流电源并联运行、直流网络中的负载平衡等方向,能够解决影响下垂控制功率均分特性、端口电压指令补偿值不同、无法母线电压跌落补偿等问题,达到强灵活性及自适应性、成本低、可靠性高的效果
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[0051] The present invention will be further described below in conjunction with the accompanying drawings.
[0052] The present invention is mainly used in the field of coordinated control of DC microgrids. The main circuit diagram of DC microgrids in the island state is as follows: figure 1 shown. The present invention adopts a unique control structure, including: capacitor voltage control, inductor current control, droop control, secondary control, bus voltage estimation, small signal injection, small signal adjustment, such as figure 2 shown.
[0053] Concrete steps of the present invention are as follows:
[0054] 1) According to the output current i of the converter port o , bus voltage reference Droop coefficient d b with the line resistance estimate r e , to generate the basic port voltage command of the converter through droop control The calculation formula is as follows:
[0055]
[0056] 2) According to the output voltage v of the converter port o , ...
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