基于控保信号序列化和力引导算法的高压直流故障智能诊断可视化技术研究

针对高压直流输电系统故障信号繁多分散难以直观查看故障过程、关键信息，以及录波波形不标注关键变化时刻、不能显示波形文件外重要保护事件的问题，提出了基于状态分组的控保信号序列化技术和基于力引导算法的波形事件标签智能加载技术。首先，利用基于状态分组的直流控保信号序列化技术提取最重要的直流控保信号，根据信号变化确定系统状态，按系统状态对信号分组并概括描述，将高压直流故障过程中一、二次设备变化情况以可视化的动作时序图形式展示。同时，利用基于力引导算法的波形事件标签智能加载技术对开关量变位及保护事件信息展示为图形化标签，并在相关波形通道曲线上基于时间轴同步标示的方法，将基于录波和相关事件的故障分析过程可视化简明展示。最后，在国调中心、浙江省调、江苏省调和南网总调等实际工程现场推广应用，结果表明所提技术方案可方便调度运行和保护专业人员快速了解故障情况，提升高压直流故障处理效率。

Intelligent diagnosis and visualization technology for high voltage DC faults based on control and protection signal serialization and a force guidance algorithm

There are numerous and scattered fault signals in the HVDC transmission system, making it difficult to visually view the fault process and key information. There is also an inability to display important protection events outside the waveform file without marking the critical change time in the waveform. In response to these problems, a control signal serialization technology based on state grouping and an intelligent loading technology for waveform event labels based on force guided algorithm are proposed. First, using the serialization technology of HVDC control and protection signals based on state grouping, the most important HVDC control and protection signals are extracted. The system state is determined based on the signal changes, and the signals are grouped and summarized according to the system state. The changes in the primary and secondary equipment of the system during the HVDC fault process are presented in a visual action sequence diagram. At the same time, waveform event label intelligent loading technology based on force guided algorithm is used to display the switch displacement and protection event information as graphical labels. The fault analysis process based on waveform recording and related events is visualized and concisely displayed on the relevant waveform channel curve using the method of synchronous labeling on the time axis. Finally, the proposed technical solution is applied in practical engineering sites such as the National Dispatch Center, Zhejiang Dispatch, Jiangsu Dispatch, and Southern Power Grid General Dispatch. The results show that the proposed technical solution is convenient for scheduling, operation, and protection professionals to quickly understand the fault situation, improving the efficiency of HVDC fault handling.