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HIGHER HARMONIC MEASURING METHOD OF POWER SYSTEM AND HIGHER HARMONIC MEASURING DEVICE

机译:电力系统高次谐波测量方法及高次谐波测量装置

摘要

PROBLEM TO BE SOLVED: To execute higher harmonic measurement by injecting dispersedly an in-phase current synchronized by a non-integer-fold frequency of a system fundamental frequency from each low rank system to the high rank system side, regardless of the load state of each low rank system or the like. SOLUTION: One of plural injection devices 8a-8d is used as a standard device, and only the standard device 8a among the devices 8a-8d is driven before measurement, and an output current of an injection frequency by the device 8a is injected from a low rank system 6a to which the device 8a is connected, through a high rank system 1, to low rank systems 6b-6d to which residual devices 8b-8d are connected, and phases of the currents of injection frequencies of each system 6b-6d are detected. On measurement, the device 8a is driven, and simultaneously the devices 8b-8d are driven with output current phases shifted by 180 deg. from the detected phases of the currents of the injection frequencies before measurement at each low rank system 6b-6d, and the same phase currents synchronized by the injection frequencies based on the output current phase of the device 8a are injected simultaneously from the system 6b-6d to the high rank system side.
机译:解决的问题:通过将与系统基频的非整数倍频率同步的同相电流从每个低阶系统侧向高阶系统侧分散注入同相电流来执行高次谐波测量,而无论负载状态如何。每个低等级系统等等。解决方案:多个注入设备8a-8d中的一个用作标准设备,并且在测量之前仅驱动设备8a-8d中的标准设备8a,并且从设备8a注入注入频率的输出电流。通过高等级系统1将设备8a连接到的低等级系统6a,连接到剩余设备8b-8d的低等级系统6b-6d,以及每个系统6b-6d的注入频率的电流相位。被检测到。在测量时,驱动装置8a,同时以输出电流相移180度驱动装置8b-8d。在每个低阶系统6b-6d进行测量之前,先从检测到的注入频率电流的相位中提取相位,然后从系统6b-b同时注入基于设备8a的输出电流相位,由注入频率同步的同相电流。 6d到高级系统端。

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