研制了一套适用于企业配电网低压大电流负荷的谐波与无功补偿装备,即HAPF-IVC综合补偿装置。采用高压与低压相结合的谐波治理方式,在变压器10 kV高压侧采用较小容量的高压注入式混合型有源电力滤波系统(HAPF),同时在380 V低压侧投运一组智能型无功补偿装置(IVC)与无源滤波器相配合以实现无功的动态补偿,达到了谐波治理和无功补偿相结合的效果,解决了大电流情况下HAPF容量限制的瓶颈。实验结果表明输入电流畸变率由补偿前的31.1 % 降低到3.9 %,功率因数由补偿前的0.7提高到0.95。
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This paper focuses on the routing protocol for driving safety that vehicle collects state message from roadside sensors in VANET-WSN. Routing Protocol for Low Power and Lossy Networks (RPL), a tree-based routing protocol, adapts naturally to our routing requirement. But RPL is designed for static wireless sensor network, so we need to modify RPL to fit in with high dynamic topology of VANET-WSN. For the first time, we utilize Geographical Information (GI) as the metric for RPL (GI-RPL), which lets RPL in a timely fashion. We also propose some strategies for tuning RPL in VANET-WSN. To demonstrate the performance of GI-RPL, we set up a simulation by using Cooja and compare with another modified RPL. The result of simulation shows that GI-RPL has high Package Delivery Ratio (PDR), reasonable overhead and low delay.
2021-10-07 21:40:32 343KB VANET, IVC, RPL
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