Optical Fiber Grating Sensor for Force Measurement of Anchor Cable

The development of the sensor suitable for measuring large load stress to the anchor cable becomes an important task in bridge construction and maintenance. Therefore, a new type of optical fiber sensor was developed in the laboratory - optical fiber grating sensor for force measurement of anchor cable （OFBFMAC）. No similar report about this kind of sensor has been found up to now in China and other countries. This sensor is proved to be an effective way of monitoring in processes of anchor cable installation, cable cutting, cable force regulation, etc, with the accurate and repeatable measuring results. Its successful application in the tie bar cable force safety monitoring for Wuhan Qingchuan bridge is a new exploration of optical fiber grating sensing technology in bridge tie bar monitoring system.

含高比例分布式光伏的主配网运行风险评估与防控策略研究

大规模分布式光伏的接入给主配网运行带来较大风险,为了确保系统的安全性和可靠性、优化主配网资源,该文研究了大规模分布式光伏接入的主配网运行风险评估方法和防控策略。首先,在主配网的安全、平衡和消纳方面,提出了主配网风险评估指标体系;其次,针对主配网是否处于紧急场景,分别提出了主配网风险辅助决策和分层分区紧急切负荷策略;最后,研发了基于调控云的高比例分布式光伏并网风险智能分析与防控决策系统,并在地区电网开展了示范应用。算例分析和示范应用效果均证明了所提的方法和策略能够对电网可能发生的安全、平衡和消纳等方面的风险进行在线评估和防控,有效提升了分布式新能源并网运行的风险防控能力,为电网运营商和决策者提供了有价值的参考,进一步推动清洁能源的可持续发展。