| 微机消谐装置工作原理 |
| 添加时间：2018/7/5 14:43:38 浏览次数： |
| 微机消谐装置工作原理 Working principle of microcomputer harmonic elimination device 本装置采用高性能的单片微机作为核心元件，对PT开口三角电压（即零序电压）进行遁环检测。正常工作情况下，该电压小于30V，装置内的大功率消谐元件 （固态继电器）处于阻断状态，对系统运行不产生影响。当PT开口电压大于30V时，系统出现故障。消谐装置开始对此信号进行数据采集 ，通过电路对信号进行数字测量、滤波、放大等数字信号处理技术，然后对检测到的数据进行分析、计算，得出故障类型。如果 当前是铁磁谐振，系统立即启动消谐电路，使固态继电器导通，让铁磁谐振在阻尼作用下迅速消失。此时，CPU系统进行记 录、存贮，并自动报警、显示谐振信息（时间、频率、电压值）。如果电路是过电压或单相接地故障，微机系统检测后，分别给 出显示和报警，并记录、存贮有关故障信息。CPU系统处理完最后，返回起始状态，并继续检测电路中的状态。 The device uses high-performance single-chip microcomputer as the core component to detect the open delta voltage (zero sequence voltage) of PT. Under normal operating conditions, the voltage is less than 30V, and the high power harmonic elimination element (solid state relay) in the device is in the block state and does not affect the operation of the system. When the PT opening voltage is greater than 30V, the system fails. The harmonic elimination device starts the data acquisition of the signal, through the circuit to the signal digital measurement, filtering, amplification and other digital signal processing technology, and then analyze and calculate the detected data, and get the type of fault. If the current is ferroresonance, the system will start the harmonic elimination circuit immediately, so that the solid state relay will be switched on, so that the ferroresonance will disappear rapidly under the damping effect. At this point, the CPU system records and stores, and automatically alarm, display the resonance information (time, frequency, voltage value). If the circuit is overvoltage or single-phase grounding fault, after microcomputer system detection, display and alarm are given respectively, and the fault information is recorded and stored. After the CPU system is processed, it returns to the initial state and continues to detect the state in the circuit. |
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