Wireless multi-channel data transceiver

本发明涉及了一种无线多信道数据收发器，属于无线通信领域。本发明包括N个无线射频模块，分别负责N个信道射频信号的收发；现场可编程门阵列模块，负责配合微处理器模块完成N个无线射频模块的配置，既可实现多信道按特定模式发送，也可实时多信道同步接收，并将收到的数据附加特定标识信息后缓存；通信模块，负责与上位机的通信，支持有线的串口、USB通信方式及WIFI无线通信；微处理器模块，负责向现场可编程门阵列模块发送指令，配置各无线射频模块的工作模式，控制通信模块与上位机的信息交互过程；电源模块，负责给整个工作装置提供工作电源。本发明的特点在于其网络调试功能，能够实现无线多信道实时同步收发数据，具有通用性强，携带方便，使用灵活的优点

Wide-area measurement time synchronization system for distribution network

本发明公开一种配电网广域测量时间同步系统，包括时间同步管理单元、WIA对时网关、WIA对时模块和IEEE‑1588从钟模块。所述时间同步管理单元接收卫星授时信号，通过光纤以太网与各个IEEE‑1588从钟模块同步；所述WIA对时网关安装在光纤覆盖区域，通过IEEE‑1588协议从时间同步管理单元获取同步时间信息，转换成WIA无线网络的基准同步时钟源，进而实现无光纤覆盖区域的PMU时间同步。该系统利用WIA无线网络实现单点分散的PMU对时，是对有线对时方式的柔性补充，将有线对时和无线对时相融合，可有效解决复杂配电网地域环境下大规模部署PMU的全网时间同步问题

Wide Area Communication and Synchronization Technology of Distribution Network Based on WIA

通信网络与信号同步技术对智能配电网的发展起到至关重要的作用,配电网规模庞大、结构复杂,终端接入数量多,现有技术手段已经无法满足配电网通信全覆盖与信号精确同步的需求。本文针对配电网的弱通信环境,提出了一种基于无线工业自动化(wireless industrial automation,WIA)技术的配电网广域通信与同步技术,对通信网络和同步系统的架构进行了详细的介绍,实验结果表明,WIA技术与现有电力通信资源相结合,能够有效解决采集盲点、网络覆盖能力不足等问题,并且能够为配电网量测系统提供精准同步手段

Application of Wireless Sensor Network to Corrosion Detection of Earth Grounding Grids

提出基于电磁感应原理的接地网构成材料腐蚀状态监测方法,解决了传统开挖式检查工作量大、主观性大的问题.设计了由多个小型化无线电磁感应信号检测装置(wi-SN)构成的网络化接地网腐蚀检系统(NGCDS).在选定位置布放多个检测装置,向接地网注入特定频率电流,监测接地网的电磁感应信号,应用序贯概率比算法评估接地网腐蚀状态.开发了原型系统,模拟实验表明该系统能完成接地网腐蚀预警.</p

一种接地网故障诊断方法及系统

本申请公开了一种接地网故障诊断方法，包括：根据接地网中的激励电流和采集参数采集接地网多个导体的磁场数据；每个磁场数据带有对应接地网导体的标识；对采集到的磁场数据进行处理；将处理后的磁场数据通过无线通信方式发送给变电站服务器；变电站服务器根据所述接地网导体的标识，确认处理后的接地网第一导体的磁场数据小于第一预设阈值时，诊断出所述接地网第一导体发生故障。本申请对接地网的故障定位精确，检测效率高，并可实现在线实时检测

一种接地网导体的磁场检测装置和方法

本申请公开了一种接地网导体的磁场检测装置，包括：磁传感器，用于根据接地网中的激励电流和采集参数采集接地网多个导体的磁场数据，并将采集的磁场数据发送给预处理模块；每个磁场数据带有对应接地网导体的标识；预处理模块，用于对所述磁传感器发送的磁场数据进行预处理，并将预处理后的磁场数据发送给微处理器；微处理器，用于对预处理后的磁场数据进行数字处理，并将数字处理后的磁场数据通过无线通信模块发送给变电站服务器，使变电站服务器根据所述接地网导体的标识，诊断对应接地网导体是否发生故障。本申请提供的磁场检测装置体积小、结构简单、成本低、可实现在线实时检测

Scheme and Prospect of High-precision Synchrophasor Measurement Technology for Distribution Network

随着分布式新能源渗透率不断提高,智能配电网电力电子化趋势明显,可观问题更加严重,亟须适用于智能配电网的同步相量测量装置(D-PMU)研究。文中在调研国内外研究现状的基础上,阐述了适用于智能配电网的同步相量测量面临的科学问题,分别从高噪声和强瞬变环境下的高精度同步相量测量方法、弱通信条件下的时间同步技术、微型同步相量测量装置信息安全技术、装置研制、测试技术与测试平台5个方面,提出了配电网高精度同步相量测量技术的研究思路与框架。同时,初步提出了D-PMU的框架结构、相量测量方法与校准方法。</p

Network calculus based dimensioning for industrial wireless mesh networks

Wireless Mesh network is widely adopted in both wideband mobile communication network and short distance RF industrial network. As for the latter field, network robustness and real-time are two important issues. Network dimensioning is therefore required for this kind of networks. We models wireless mesh network as four tuples and present a topology transform methodology to change the mesh topology to a cluster tree. Research results from network calculus theory are then applied to obtain key merits such as buffer requirement, bandwidth requirement and end to end delay bound. &copy; (2013) Trans Tech Publications, Switzerland

Research on Time Synchronization Technology of Heterogeneous Network in Distribution Network Based on 5G

At present, high-precision time synchronization technology plays an important role in many industries. In smart grid, wide area measurement system (WAMS), event sequence recording (SOE), and fault recording all need unified reference time for synchronization, which improves the application level of power grid accident analysis and stability control, and improves the power supply network efficiency. It can improve grid reliability and efficiency. This paper designs the time synchronization technology of heterogeneous network in distribution network with the help of 5G URLLC network technology. It can switch clock types according to different synchronization regions, and can coordinate time synchronization between heterogeneous networks, without additional protocol overhead and equipment development cost, and has good network compatibility

Robust Fault Protection Technique for Low-Voltage Active Distribution Networks Containing High Penetration of Converter-Interfaced Renewable Energy Resources

With the decentralization of the electricity market and the plea for a carbon-neutral ecosystem, more and more distributed generation (DG) has been incorporated in the power distribution grid, which is then known as active distribution network (ADN). The addition of DGs causes numerous control and protection confronts to the traditional distribution network. For instance, two-way power flow, small fault current, persistent fluctuation of generation and demand, and uncertainty of renewable energy sources (RESs). These problems are more challenging when the distribution network hosts many converter-coupled DGs. Hence, the traditional protection schemes and relaying methods are inadequate to protect ADNs against short-circuit faults and disturbances. We propose a robust communication-assisted fault protection technique for safely operating ADNs with high penetration of converter-coupled DGs. The proposed technique is realizable by employing digital relays available in the recent market and it aims to protect low-voltage (LV) ADNs. It also includes secondary protection that can be enabled when the communication facility or protection equipment fails to operate. In addition, this study provides the detail configuration of the digital relay that enables the devised protection technique. Several enhancements are derived, as alternative technique for the traditional overcurrent protection approach, to detect small fault current and high-impedance fault (HIF). A number of simulations are performed with the complete model of a real ADN, in Shenyang, China, employing the PSCAD software platform. Various cases, fault types and locations are considered for verifying the efficacy of the devised technique and the enabling digital relay. The obtained simulation findings verify the proposed protection technique is effective and reliable in protecting ADNs against various fault types that can occur at different locations.</p