高压直流断路器限流优化控制方法及仿真

发布时间：2018-05-06 11:58

本文选题：直流电网 + 高压直流断路器　；参考：《电网技术》2017年01期

【摘要】：高压直流断路器是直流电网的关键设备之一。基于直流断路器的限流控制方法可以使故障电流保持在参考值周围,为系统故障处理的控制策略提供时间,同时可以使保护区域免受故障端影响。首先对限流控制进行了分析,指出在系统参数一定的情况下,限流参考值的大小直接影响避雷器吸收能量多少,而避雷器投入个数的变化频率则影响很小。随后提出了一种限流优化控制方法,通过检测避雷器吸收能量多少来转换避雷器能量排序的触发信号频率。最后,通过PSCAD/EMTDC仿真分析,验证了该优化控制方法的有效性,能够在保证避雷器吸收能量平衡的同时,减少避雷器投入次数,延长避雷器使用寿命,增强直流断路器的可靠性。
[Abstract]:High voltage DC circuit breaker (HVDC) is one of the key equipment in DC network. The current limiting control method based on DC circuit breaker can keep the fault current around the reference value, which can provide the time for the control strategy of the system fault processing, and at the same time, it can protect the protection area from the influence of the fault end. Firstly, the current limiting control is analyzed, and it is pointed out that the magnitude of the current limiting reference value directly affects the absorptive energy of the arrester, while the change frequency of the input number of the arrester has little effect on the condition that the system parameters are fixed. Then a current limiting optimal control method is proposed to convert the frequency of trigger signal of arrester energy order by detecting the energy absorbed by arrester. Finally, the effectiveness of the optimal control method is verified by PSCAD/EMTDC simulation, which can reduce the input times of arresters, prolong the service life of arresters and enhance the reliability of DC circuit breakers while ensuring the energy balance of arresters.
【作者单位】：直流电网技术与仿真北京市重点实验室(全球能源互联网研究院);华北电力大学电气与电子工程学院;国家电网公司;先进输电技术国家重点实验室(全球能源互联网研究院);
【基金】：国家电网公司科技项目(XTB17201500247)~~
【分类号】：TM721.1;TM561

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