Energy-storage unit state detection method and system

Abstract

The invention provides an energy storage unit state detection method and an energy storage unit state detection system. The energy storage unit state detection method comprises the steps of acquiring a channel peak-to-peak value sequence of an energy storage unit, and executing the following iterative processing of: establishing a correlation coefficient benchmark matrix from a kth day to a (k+h)th day and a correlation coefficient reference matrix from a (k+1)th day to a (k+h+1)th day based on the channel peak-to-peak value sequence, wherein k is great than or equal to 1, and h is greater than 0; calculating an absolute value matrix of difference values between the correlation coefficient reference matrix and the correlation coefficient benchmark matrix; judging whether elements in the absolute value matrix of the difference values are greater than a preset threshold value or not; and substituting k with k+1 if an arbitrary element in the absolute value matrix of the difference values is less than or equal to the preset threshold value. The energy storage unit state detection method and the energy storage unit state detection system can investigate early faults of channels of the energy storage unit, reflect the trend of channel degradation, fully consider the correlation between different channels, solve the problem of difficult threshold setting, realize the early detection of channel anomaly, and have high redundancy.

Description

technical field [0001] The invention relates to the detection field, in particular to a method and system for detecting the state of an energy storage unit. Background technique [0002] During the 13th Five-Year Plan period, with the in-depth development of the energy Internet, the construction of pumped storage power stations has entered a stage of leapfrog development. At the same time, higher requirements have been put forward for the operation and maintenance of pumped storage units. At present, pumped storage units are generally equipped with a condition monitoring system to monitor the operating stability (vibration, swing, pressure pulsation, etc.) parameters of the unit to determine whether the unit is abnormal and take timely measures to prevent the unit from "sick" operation. However, in actual operation, due to various reasons such as sensors, signal conversion devices, and data acquisition systems, the data detected by the condition monitoring system is often ab...

AI Technical Summary

Problems solved by technology

In this setting method, because the lower limit value of the condition monitoring system is usually much smaller than the normal operation data, it cannot reflect the trend of channel degradation. Only when the channel is degraded to a high degree, can the relevant alarm information be given

And the lower the alarm limit needs to set different thresholds for different channels, making it difficult to set the threshold

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