Voltage qualification rate monitoring method and system
A technology with voltage qualification rate and voltage qualification, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve problems such as poor monitoring effect, and achieve the effect of low cost, good monitoring effect and low complexity
Active Publication Date: 2018-11-30
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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Problems solved by technology
[0005] Based on this, it is necessary to provide a voltage qualification rate monitoring method and system for the problem of poor monitoring effect
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Embodiment Construction
[0019] Embodiments of the voltage qualification rate monitoring method and system of the present invention will be described below with reference to the accompanying drawings.
[0020] According to the requirements of the technical specifications of the DL / T500 voltage monitor, when calculating the voltage qualification rate, the effective value sampling of the monitored voltage is required, and the sampling period is at least once per second, and it is stored as a preprocessing value. 1 minute is taken as a statistical unit, and the average value of the voltage preprocessing value within 1 minute is taken as the voltage measurement value of the monitored point. If the measured value exceeds the upper and lower limits of the voltage of the monitoring point, it is determined that the voltage is unqualified within this period. The voltage qualification rate is the percentage value between the actual operating voltage within the allowable voltage deviation range and the correspond...
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The invention relates to a voltage qualification rate monitoring method and a voltage qualification rate monitoring system. The method comprises the following steps: classifying monitoring terminals according to the attribute information of the monitoring terminals to get a first category with a voltage qualification rate calculation function, a second category without a voltage qualification rate calculation function but with a voltage out-of-limit time counting function, and a third category with a voltage qualification condition monitoring function; if a monitoring terminal belongs to the first category, setting the voltage qualification rate calculated by the monitoring terminal as the voltage qualification rate of a monitoring point; if the monitoring terminal belongs to the second category, sending the total time of voltage monitoring and the voltage out-of-limit time monitored by the monitoring terminal to a master station, and calculating the voltage qualification rate of the monitoring point at the master station according to the total time of voltage monitoring and the voltage out-of-limit time; if the monitoring terminal belongs to the third category, collecting the effective value of voltage of the monitoring point through the master station, and estimating the voltage qualification rate of the monitoring point according to the effective value of voltage and a preset voltage threshold.
Description
technical field [0001] The invention relates to the technical field of power distribution and utilization, in particular to a method and system for monitoring voltage qualification rate. Background technique [0002] The quality of voltage plays a decisive role in the normal operation of power equipment, and the voltage qualification rate is an important indicator to measure the quality of voltage. If the measured voltage value exceeds the upper and lower limits of the monitoring point voltage, it is determined that the voltage is unqualified within this period. The voltage qualification rate is the percentage between the actual operating voltage within the allowable voltage deviation range and the corresponding total operating statistical time. value. Whether it is too high or too low is not conducive to the operation of the motor, it will increase the power consumption, affect the user's power quality, and increase the cost of electricity. Therefore, monitoring the qualif...
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IPC IPC(8): G01R19/165
CPCG01R19/16528
Inventor 钱斌赵云肖勇赖宇阳隋兴嘉
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD