System for measuring the harmonics of electric power in using internet

摘要

The present invention relates to a multiple of the power system of the harmonic measurement system to control the measuring device via the Internet, which can be measured harmonics of the power system and analyzing equipment are installed for each power stage in the power systems over the Internet,; A plurality of sensor unit through the hole current sensor and a voltage dividing circuit for measuring the instantaneous current value of each phase to a power line of the power system includes a voltage measurement for measuring the instantaneous voltage value; A plurality of signal conversion unit operable to store the samples to hold the sensor of the measured value for a short period, and outputs the measured values ​​recorded by the external request, sequentially with; Measuring device comprising outputting a sample hold control signal to allow the instantaneous measurement part converting the plurality of signals at the same time, processes it receives the instantaneous measurement value output therefrom sequentially portion Analysis for transmitting via the serial port to the outside and .;; At least one communication device for connection with a measuring device with a serial port and, transmitting the data received therefrom in accordance with a request from the outside via the Internet and;; The measurement data storage for receiving the identification code and the voltage and / or current frequency and phase angle, the real power, the measurement data relating to the reactive power of the measurement device is installed in each of the power plant only transmitted over the internet from the communication device, and processing to analyze the fault conditions, whether or not the power consumption, such as short circuit, ground fault of the power plant end of, and including a central management server to store the analyzed data managing power energy management in each power plant, however, characterized in that the monitoring It shall be.