基于广域行波能量和时间差的复杂电网故障定位方法

• Format: Patent
• Language: Chinese
• Published: 25.01.2019
• Subjects: GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ONOTHER TECHNOLOGY AREAS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORKOPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FORIMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION,DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TESTING

本发明公开了基于广域行波能量和时间差的复杂电网故障定位方法，该故障定位方法从电网发生故障后产生行波能量出发，分析线路长度和母线出度对行波能量在电网传播过程中衰减的影响，测量故障发生后各变电站的三相电流，计算各变电站的行波能量大小，据此确定故障区段和故障点。本发明通过利用大量现有设备，对数据采样实时性要求低，容易实现；经按实际参数建立的仿真模型分析，不受故障相角和故障阻抗的影响，且精度很高，鲁棒性强。本发明的定位方法适合应用于复杂电网中。 The invention discloses a complex power grid fault location method based on wide-area travelling wave energy and time difference. According to the fault location method, by starting from travelling wave energy generated after failure of a power grid, the influence of line length and bus out-degree on the attenuation of travelling wave energy in the process of transmission in the power grid is analyzed, the three-phase current of each substation after failure is measured, the magnitude of travelling wave energy of each substation is calculated, and thus, a fault section and a fault point are determined. A lot of existing equipment is used in the method. The method requires low real-time performance of data sampling, and is easy to implement. Through analysis of a simulation model built accordi