金融界2025年6月14日消息，国家知识产权局信息显示，国网冀北电力有限公司电力科学研究院、天津大学、国网冀北电力有限公司申请一项名为“柔性直流电网系统宽频谐波类型分析及传播路径追踪方法”的专利，公开号CN120142833A，申请日期为2025年02月。
专利摘要显示，本发明公开了一种柔性直流电网系统宽频谐波类型分析及传播路径追踪方法，包括以下步骤：根据柔性直流电网系统的电气主接线图，确定直流网络谐波监测点的数量和位置，以及各个直流网络谐波监测点中不同类型和频率的谐波限值；确定各换流站谐波监测点采样频率和间隔，对直流电网各换流站直流侧母线电流进行谐波在线监测；直流电网中发生谐波幅值超标事件，确定超标谐波的类型以及需要追踪超标谐波的频率或频带，并向所有监测点下发监测指令；根据各个谐波监测点在相同时间段内所需追踪的谐波幅值关系，以频率为特征实现谐波在直流输电网络传播路径的快速追踪。
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