CN-122017659-A - UPS power supply capacity measuring method, measuring equipment, program product and medium

CN122017659ACN 122017659 ACN122017659 ACN 122017659ACN-122017659-A

Abstract

A UPS power supply capacity measuring method, measuring equipment, a program product and a medium relate to the technical field of UPS power supply capacity measurement. In the method, under the condition that the load power of the data center is changed drastically, a significant polarization effect is generated inside the UPS, so that the capacity of the UPS measured based on an ampere-hour integration method is higher. The measuring equipment combines the equivalent thermal resistance reflecting the internal thermodynamic characteristics of the battery with the maximum voltage extreme value difference reflecting the electrochemical characteristics to construct a polarization coefficient. Further, the coefficient is multiplied by a time decay factor representing the time response delay, thereby quantifying the polarization loss capacity which is temporarily not released due to the polarization effect. Finally, by subtracting this dynamic loss from the conventional ampere-hour integral total capacity, a current target available capacity is obtained. Therefore, under the condition that the load power is changed drastically, the accuracy of measuring the capacity of the UPS is improved.

Inventors

DONG MINGXIAN
ZHANG PENGFEI

Assignees

北京索科曼正卓智能电气有限公司

Dates

Publication Date: 20260512
Application Date: 20260226

Claims (10)

1. A method of UPS power source capacity measurement, for use with a measurement device, the method comprising: under the condition that the load current change rate of the target UPS is detected to be larger than a preset change rate threshold value, acquiring voltage data and current data in preset time and temperature data of a preset UPS temperature measuring point; Extracting maximum voltage extreme value difference and recovery time of load current change rate from greater than a preset change rate threshold value to not greater than the preset change rate threshold value from a response curve, wherein the response curve is a response curve of the voltage data along with the change of the current data; determining the square value of the root mean square value of the current data and the multiplication value of the equivalent internal resistance of the target UPS power supply as Joule heat power; determining equivalent thermal resistance of the target UPS power supply based on the temperature data and the Joule thermal power, wherein the equivalent thermal resistance is total heat blocking capacity on a heat transfer path from the equivalent internal resistance to a preset temperature measurement point in the target UPS power supply; determining a product value of the equivalent thermal resistance and the maximum voltage extremum difference as a polarization coefficient; taking the division value of the polarization coefficient and a preset reference polarization coefficient as a normalized polarization coefficient; taking the divisor of the voltage recovery time and the preset reference recovery time as a polarization recovery time deviation coefficient; performing exponential operation on the polarization recovery time deviation coefficient to determine a time attenuation factor; Taking the multiplication value of the polarization loss factor and the nominal capacity of the target UPS as the polarization loss capacity, wherein the polarization loss factor is the multiplication value of the normalized polarization coefficient and the time attenuation factor; And subtracting the polarization loss capacity from the total capacity of the target UPS power supply calculated based on an ampere-hour integration method, and determining the target available capacity of the target UPS power supply.
2. The method of claim 1, wherein prior to the step of determining the square of the root mean square value of the current data and the multiplied value of the equivalent internal resistance of the target UPS power source as joule heating power, the method further comprises: marking the moment when the load current change rate of the target UPS is greater than the preset load current change rate threshold as abrupt moment; Determining a current value corresponding to the abrupt change moment as a current reference value; determining the current variation between the abrupt change moment and the voltage drop minimum point moment in the response curve; Taking the dividing value of the maximum voltage extreme value difference and the current variation as a basic internal resistance value; multiplying the difference between the average temperature value and the preset reference temperature by a preset temperature coefficient, adding 1, and determining a temperature correction factor, wherein the average temperature value is determined based on the temperature values of all the temperature measuring points; and taking the multiplied value of the basic internal resistance value and the temperature correction factor as the equivalent internal resistance of the target UPS power supply.
3. The method of claim 1, wherein said determining an equivalent thermal resistance of said target UPS power source based on said temperature data and said joule heating power, comprises: Determining a highest temperature value and a lowest temperature value from the temperature values of all the preset UPS power supply temperature measuring points; Taking the difference value between the highest temperature value and the lowest temperature value as the maximum temperature difference; taking the maximum temperature difference and the value obtained by dividing the joule heating power as an instantaneous thermal resistance value; taking the ratio of the voltage recovery time to the preset standard recovery time as a time factor; And taking the multiplication of the instantaneous thermal resistance value and the square root of the time factor as the equivalent thermal resistance of the target UPS power supply.
4. A method according to claim 3, wherein after the step of taking the difference between the highest temperature value and the lowest temperature value as the maximum temperature difference, the method further comprises: calculating the geometric distance between each temperature measuring point and the temperature measuring point with the highest temperature value; constructing a temperature-distance distribution curve by taking the temperature value of each temperature measuring point as an ordinate and the geometric distance as an abscissa; performing linear fitting on the temperature-distance distribution curve to determine a temperature gradient slope; the measuring equipment calculates fitting decision coefficients of the temperature-distance distribution curve; when the fitting decision coefficient is lower than a preset fitting decision threshold, determining that local hot spots exist in temperature data of a preset UPS power supply temperature measuring point; The measuring equipment identifies a temperature measuring point with the largest distance away from the fitting straight line as an abnormal hot spot; the measuring equipment recalculates the highest value and the lowest value of the temperature after eliminating the abnormal hot spot; and taking the corrected maximum temperature difference calculated based on the recalculated maximum and minimum temperature values as the maximum temperature difference.
5. A method according to claim 3, wherein after said step of dividing the maximum temperature difference by the joule heating power as an instantaneous thermal resistance value, the method further comprises: Determining whether the instantaneous thermal resistance value is less than a preset minimum thermal resistance threshold or greater than a preset maximum thermal resistance threshold; When the instantaneous thermal resistance value is smaller than the preset minimum thermal resistance threshold value, replacing the instantaneous thermal resistance value with the minimum thermal resistance threshold value; When the instantaneous thermal resistance value is larger than the maximum thermal resistance threshold value, determining a second high temperature value and a second low temperature value from the temperature values of all the temperature measuring points; Taking the difference value between the second highest temperature value and the second lowest temperature value as a second maximum temperature difference; The measurement device replaces the instantaneous thermal resistance value with a divisor of the second maximum temperature difference and the joule heating power.
6. The method of claim 1, wherein prior to the step of dividing the polarization coefficient by a predetermined reference polarization coefficient as a normalized polarization coefficient, the method further comprises: Carrying out load step tests for preset times when the target UPS is in a standard working condition, and calculating a standard polarization coefficient in each load step test; Calculating an arithmetic mean and a standard deviation according to all the standard polarization coefficients; Rejecting the standard polarization coefficient smaller than a lower limit threshold or larger than an upper limit threshold, wherein the lower limit threshold is a value obtained by subtracting a preset multiple from the arithmetic mean value and the standard deviation is a value obtained by adding the preset multiple to the arithmetic mean value; taking an arithmetic average value calculated based on the remaining standard polarization coefficients as an initial reference polarization coefficient; determining the divisor of the service life of the target UPS power supply and the preset design life as an age-ageing proportion; determining the divisor value of the charge-discharge cycle number and the preset rated cycle number of the target UPS power supply as a cycle aging proportion; Adding the multiplication value of the age ageing proportion and the preset age weight and the multiplication value of the cyclic ageing proportion and the preset cyclic weight, and then adding 1 to determine an ageing correction factor; the measurement device takes the multiplication value of the initial reference polarization coefficient and the aging correction factor as the preset reference polarization coefficient.
7. The method of claim 1, wherein after the step of determining the target available capacity of the target UPS power source, the method further comprises: Taking the ratio of the polarization loss capacity to the nominal capacity of the target UPS power supply as a polarization loss duty ratio; and when the polarization loss duty ratio is larger than a preset polarization loss threshold value, generating polarization effect abnormality early warning information of the target UPS power supply.
8. A measuring device comprising one or more processors and memory coupled to the one or more processors, the memory for storing computer program code comprising computer instructions that the one or more processors invoke to cause the measuring device to perform the method of any of claims 1-7.
9. A computer program product containing instructions, which, when run on a measuring device, cause the measuring device to perform the method of any of claims 1-7.
10. A computer readable storage medium comprising instructions which, when run on a measurement device, cause the measurement device to perform the method of any of claims 1-7.

Description

UPS power supply capacity measuring method, measuring equipment, program product and medium Technical Field The present application relates to the technical field of UPS power source capacity measurement, and in particular, to a UPS power source capacity measurement method, a measurement apparatus, a program product, and a medium. Background The UPS is used as an important device for ensuring continuous and stable operation of key equipment such as a data center, a communication base station and the like, and the capacity state of a storage battery of a core component is directly related to the reliability of standby power supply capacity. With the popularization of data centers, the cluster load of the measuring equipment presents remarkable dynamic characteristics, the load power can be increased from 30% to 95% in a short time, and higher requirements are put on the dynamic power supply capacity of the UPS. In the related art, the UPS power capacity assessment mainly adopts an ampere-hour integration method, namely, the released capacity is calculated by measuring the product of the discharge current of a battery and time, and the voltage drop coefficient is corrected based on a constant internal resistance value. Meanwhile, through the collected electrical parameters such as battery terminal voltage, discharge current and the like, the residual available capacity of the battery is estimated by combining with a preset battery capacity experience coefficient. However, in the case of severe load power changes in the data center, significant polarization effects may occur inside the battery, resulting in uneven electrolyte ion concentration distribution, and thus temporarily disabling the effective capacity of the UPS power source. Meanwhile, frequent load fluctuation can aggravate internal heating of the battery, and rapid accumulation of joule heat can aggravate polarization phenomenon, so that the actual available capacity of the UPS is lower than the UPS capacity measured by an ampere-hour integration method in the related technology. Disclosure of Invention The application provides a UPS power supply capacity measuring method, measuring equipment, a program product and a medium, which are used for improving the accuracy of measuring the UPS power supply capacity under the condition that the load power is changed drastically. A method for measuring capacity of UPS includes obtaining voltage data, current data and temperature data of temperature measurement point of preset UPS in preset time when load current change rate of target UPS is greater than preset change rate threshold is detected, extracting maximum voltage extreme value difference and load current change rate from response curve to be recovery time of voltage data along with change of current data, determining square value of square root value of current data and multiplication value of equivalent internal resistance of target UPS as Joule thermal power, determining equivalent thermal resistance of target UPS as total thermal resistance on heat transfer path from equivalent internal resistance to preset temperature measurement point in target UPS, determining product value of equivalent thermal resistance and extreme value difference as polarization coefficient, taking division value of polarization coefficient and preset reference polarization coefficient as normalized polarization coefficient, taking division value of voltage recovery time and preset reference recovery time as polarization coefficient, taking square value of square root value of current data and multiplication value of equivalent internal resistance of target UPS as Joule thermal power, determining total thermal resistance on heat transfer path total thermal resistance based on temperature data and Joule thermal power as target UPS internal resistance between equivalent internal resistance and preset temperature measurement point, determining product value of equivalent thermal resistance and extreme value difference as polarization coefficient, taking division value of polarization coefficient and preset reference polarization coefficient as normalized polarization coefficient, taking division value as recovery time coefficient, taking voltage recovery time coefficient and time loss as target loss of power loss as target value. By adopting the technical scheme, the equivalent thermal resistance reflecting the internal thermodynamic characteristics of the battery is combined with the maximum voltage extreme value difference reflecting the electrochemical characteristics to construct a polarization coefficient. The coefficient can further represent the comprehensive performance bottleneck of the battery in response to dynamic impact. Further, the coefficient is multiplied by a time decay factor representing the time response delay, thereby quantifying the polarization loss capacity which is temporarily not released due to the polarization effect. Finally, by subtracting this