西北电网机动应急通信系统应用模式探讨

为提高西北电网在应对自然灾害和突发事件时的应急通信保障能力,建设了机动应急通信系统。介绍该系统的组成和功能,并结合西北电网的实际情况,重点讨论在不同应用场合下的组网方式和应用模式,为增强应急通信系统的灵活性、实用性,确保其在应急场合发挥最佳功效提供参考依据。     

建立上海电网应急管理体系的建议与思考

从上海电网的运行现状以及完善应急管理体系的必要性出发,结合日本东京电力公司的应急管理体系的结构和经验,对建立上海电网的应急指挥系统提出了几点建议。对于完善上海电网的应急管理体系,提高应急能力,保障城市安全、社会稳定和人民生命财产安全具有重要的意义。     

电网智慧应急单兵装备关键技术研究

为应对自然灾害多发、重发趋势,亟需研究基于新一代的电网智慧应急单兵装备关键技术.介绍了新型背包式电网智慧应急单兵装备的设计思路,基于人脸识别、二维码识别、OCR车牌识别以及兴趣点跟踪等技术,在应急培训、演练、救援和指挥作业中,可以实现现场应急人员与后台指挥之间高效的沟通,提高现场应急作业效率,通过卫星通信和局域组网技术...     

基于主客观赋权VIKOR法的电网应急能力评价方法

考虑到电网运行的复杂性,为了尽可能地减少大面积停电事故造成的损害,研究电网应急能力评价非常必要。采用G1和变异系数法相结合的主客观赋权方法对电网应急能力评价指标体系进行权重赋值,减少了评价过程中单种方法过于片面的影响,并运用VIKOR法防止个别指标的消极影响被其他指标中和,使评价结果更接近理想情况,进而建立了一种基于主客观赋权VIKOR法的电网应急能力评价模型。将该模型应用于浙江省5个城市的电网应急能力评价中,验证了模型的有效性。     

虚拟现实技术在电网应急演练模拟系统中的应用

文章在详细分析目前电力应急管理研究存在的问题和面临的挑战基础上,首先明确了电网应急演练模拟系统的建设目标以及建设的基本原则;详细阐述了电网应急演练模拟系统的构成及开发流程,以及演练模拟仿真中的虚拟现实技术,并从系统的总体业务功能架构、技术架构等方面具体介绍了系统的总体架构,且将系统功能分为演练配置、演练执行、单项技能及演练评估;最后对电网应急演练未来研究提出了展望,指出未来电网应急演练的理论研究和模拟系统建设应结合多智能体技术和物联网技术开展。     

浙江电力应急通信系统建设

为提高浙江电网在应对自然灾害和突发事件时的应急通信保障能力,结合浙江电网的实际情况,文章以卫星通信为远程接入手段,充分结合无线图像和宽带传输设备等近程接入手段,以满足语音业务、视频业务以及数据业务接入要求,建设了浙江电力应急通信系统。同时介绍了车辆改装和工程工期的要求,对电力行业应急通信的建设具有一定的参考价值。     

电网企业应急指挥中心建设中的协同设计

突发事件会导致电网的生产经营遭受重大影响,电网企业应急指挥中心在应对突发事件过程中为确保电网安全稳定运行发挥了重大作用。应急指挥中心的功能在于体现应急保障能力,其使用频次相对较低。文章从应急指挥中心各系统的功能出发,提出了其与其他场所协同化设计的可能性。在充分比较不同功能实体的相似性和差异性后,结合各地实际需求情况,提出了协同化设计中需要重点关注的问题以及相应的解决方案,通过功能归并充分体现价值工程的观点,提高应急指挥中心的利用率。     

国家电网公司全面提高电网设计建设标准

2008年3月1日，国家电网公司电网建设标准暨科技减灾新闻发布会在京召开。发布会介绍了为提高电网抵御特大冰雪灾害能力、电网应急抗灾水平，国家电网公司制定实施电网建设标准和利用科技手段减轻灾害对电网影响的展开情况。国家发改委、国资委、中电联领导出席了会议。     

基于领域环境火点综合辨识法的电网山火监测预警的研究及应用

森林火灾是电网输电线路故障跳闸的主要原因之一,可靠监测火点,有效预警火情火势,提前采取防御措施,保障电网安全稳定运行。森林火灾漫延速度快,尽早准确识别出可能威胁输电设备的火点火势,加快电网输电线路火灾应急救援。从电网山火监测需要大范围、高精度、高频度的要求出发,提出一种基于领域环境的火点综合辨识方法;为提高山火监测预警的准确率和时效性,融合多源卫星数据,并结合深度学习机制,构建了一套电网山火监测预警的方法。研究成果是福建电网灾害监测预警和应急指挥管理系统的重要组成模块,已应用于国网福建电力应急管理工作中。     

灾害多发区域昭通保底电网规划研究

为提高城市电网防灾应急保障能力,客观应对城市电网面临风险,以减少损失、快速恢复为基本原则,远近结合,最大限度利用好现有网架,提升电网防灾抗灾水平,有必要开展保底电网规划研究工作。文中结合昭通地区灾害多发的特点,进行了保底电网的规划研究,经现实论证,取得了较为理想的效果。     

电力应急队伍调度决策研究

应急队伍调度在电力应急指挥平台管理中有着至关重要的作用,但是目前关于应急队伍调度决策的研究还非常少.引入Mamdani型模糊推理系统理论,建立了电网应急队伍调度辅助决策模型.根据大面积停电事故的相关统计数据设定了模型参数,提出了一种综合的应急队伍需求评估的指标体系和基于Mamdani型模糊推理的应急队伍需求评估分级方法,通过实例验证该方法为电力应急辅助决策系统提供了一套有效的调度计算方法.     

基于事件触发的权重评估法在电力应急中的应用

针对电力系统需应对不同的突发事件,为更灵活地分配权责,协调各电力部门的应急活动,提出了一种权重评估的方法。简述了电力企业的应急组织体系及各部门在不同应急阶段的应急活动,分析了应急专项小组、脆弱性指标和突发事件三者之间的关联,利用层次分析法并结合脆弱性研究和关联度分析,对各应急小组的权重进行评估。对两种事件触发下的评估结果表明,该评估方法基本符合实际情况,可反映各应急专项小组在不同事件中所起作用,很好地解决了应急各部门的定量评价问题。     

输配电生产管理系统在低压抢修中的应用

低压抢修是电力营销业务的一部分,快速响应和服务质量都将关系到供电企业的社会责任和在客户心中的形象。分析了低压抢修的现状及存在问题,叙述了生产运行中使用输配电生产管理系统(PMS),改进低压抢修管理流程,加快抢修效率,提升服务水平的效果。实践证实了,在原有营销系统(CMS)基础上引入PMS后的低压抢修流程,可以有效改善低压抢修工作的质量和提升用电客户的满意度。     

电力企业应急体系建设中常见问题及对策

结合电力企业应急体系建设的工作实际,叙述了电力企业应急体系建设中存在的常见问题,提出了电力企业应急体系建设的建议与对策.     

核电应急柴油发电机组滑油低压保护停机控制的设计优化

通过采用转速分段及增加短延时的改进方法,对当前核电应急柴油发电机组滑油低压保护停机控制设计进行了优化。经论证与试验表明:优化后的保护停机控制对机组起动及运行过程均起到了保护作用,同时确保了滑油压力的正常建立,避免了机组因受外部因素影响导致应急保护停机误动作,提高了机组起动的可靠性。该优化方案已经在核电厂应急柴油发电机组控制系统中得到广泛应用。     

三偏心快关阀的液压系统设计与动态特性仿真

大型三偏心蝶阀作为紧急切断系统逐步推广应用到燃气发电机组进气保安系统中,其液压控制系统的动态响应特性及可靠性对电站安全运行至关重要。针对三偏心蝶阀作为紧急切断阀系统的功能要求,设计出满足紧急切断要求的液压控制方案。建立液压控制系统的仿真模型,对开阀及关阀过程进行系统的动态特性仿真,并对研制的紧急切断阀系统的动态响应进行了试验,全开过程中执行机构活塞实测最大位移比仿真结果大0.2mm,快关阀全开和紧急关闭实测最长时间都比仿真结果多0.01s。证明在设计过程中采用仿真技术能够准确地预测设计的三偏心蝶阀系统的动态响应特性和优化设计方案。     

Urban market response for solar photovoltaic systems: An economic appraisal—South Indian case study

Electricity consumption in developing countries is increasing rapidly and even though governments commission large power plants—thermal, hydro, and nuclear—there is gap between the total capacities planned and the actual installed capacities. This has led to frequent and long power shortages to consumers, who respond by using emergency stand-by systems during power cuts. This article reports the results of a survey conducted in an urban area in South India among the commercial sector establishments to ascertain whether there is any potential for the use of solar photo voltaic systems (SPVS) as an emergency electricity supplying unit for lighting applications. Data regarding the lighting load, the duration of power shortages were obtained. The opinions of the establishments in installing SPVS were ascertained. A comparison of the economics of SPVS, a conventional engine-driven electricity generating a stand-by emergency system, and a battery system charged from the grid shows that SPVS is economically attractive. Other important advantages of SPVS have been highlighted.     

Continuous operation in an electric and hydrogen hybrid energy storage system for renewable power generation and autonomous emergency power supply

Under the background of extensive improvement of renewable resources and demand for reliable emergency power supply, we proposed a hybrid energy storage system including an electric double-layer capacitor bank and a hydrogen system which is composed of fuel cell, electrolyzer, gas tank and metal hydride tank. Through its integration with photovoltaic power sources in a local direct current grid, we expect to obtain both of stable energy source at ordinary times and long-time reliable autonomous emergency power supply when outages happen. A three-day demonstration of the proposed system was performed. The fluctuation compensation performance of the components and the long-time stable power supply obtained by the entire system were evaluated at first, hence the configuration and the management methods of the proposed system were verified in the autonomous emergency power supply application. Meanwhile, the performance of the hybrid use of the gas tank and the metal hydride tank in the system was preliminarily evaluated, for its effectiveness verification on reducing auxiliary power for temperature condition of the metal hydride tank. Moreover, we investigated the distribution characteristics of the power and energy loss in the electric double-layer capacitor, electrolyzer and fuel cell, and their correlation to the efficiency characteristics under different conditions during the operation. The investigation results showed that the continual low-load-ratio state of the electrolyzer and fuel cell led to the low efficiency, the rare high-power occurrence of the electrolyzer and fuel cell led their demanded excessive power capacity. Thus, we proposed a solution method of shifting the electrolyzer and fuel cell's load to the EDLC, when the electrolyzer and fuel cell are in low-load-ratio and excessive high-power state, in order for efficiency increase and facility capacity reduction.     

Stored energy control for long-term continuous operation of an electric and hydrogen hybrid energy storage system for emergency power supply and solar power fluctuation compensation

In order to realize a large-capacity stand-alone emergency power supply that enables highly reliable and high-quality power supply at the time of a large-scale natural disaster and enables effective use of solar power generation, we proposed an electric and hydrogen hybrid energy storage system (HESS). It is composed of an electric double-layer capacitor bank, fuel cell, electrolyzer, and hydrogen storage (buffer gas tank and metal hydride). In an emergency, this HESS is expected to supply power for loads together with photovoltaics panels for a long time. In usual time, it should not only cooperate with external electricity grids to convert unstable photovoltaic output power into reliable power supply, but also maintain sufficient stored energy in case of emergency. To realize the continuous operation of the HESS in both emergency and usual time, we proposed an electric double-layer capacitor's state-of-charge feedback control method and a hydrogen energy feedback control method, coordinating an energy management method based on Kalman filter algorithm. An experiment and a simulation demonstrated the operations of a 10-kW scale model HESS in emergency and usual time mode, respectively. The demonstrations verified the correct performance of the proposed HESS with the proposed control methods and enabled the continuous operation of the HESS.