CN115356653A - Emergency power supply state monitoring method - Google Patents
Emergency power supply state monitoring method Download PDFInfo
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- CN115356653A CN115356653A CN202210988659.7A CN202210988659A CN115356653A CN 115356653 A CN115356653 A CN 115356653A CN 202210988659 A CN202210988659 A CN 202210988659A CN 115356653 A CN115356653 A CN 115356653A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000005070 sampling Methods 0.000 claims abstract description 36
- 230000036541 health Effects 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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Abstract
The invention provides an emergency power supply state monitoring method, which comprises the steps of acquiring an offline voltage value of an emergency power supply by taking an offline monitoring period as a sampling period when the emergency power supply is in an offline state, determining the power failure electric quantity of the emergency power supply in the offline state according to the offline voltage value of the emergency power supply, connecting the emergency power supply to a load and disconnecting a mains supply of the load when the offline state time of the emergency power supply is greater than or equal to a discharge monitoring period so as to enable the emergency power supply to enter a discharge state, connecting the load to the mains supply and disconnecting the emergency power supply from the load when the ratio of the discharge electric quantity of the emergency power supply to the actual capacity of the emergency power supply is greater than or equal to a preset first threshold, charging the emergency power supply until the emergency power supply is in a full-charge state, acquiring the actual capacity of the emergency power supply after the emergency power supply is fully charged, and sending monitoring early warning information when the health degree of the emergency power supply is less than or equal to a preset second threshold, so that the health condition of the emergency power supply can be effectively monitored in time.
Description
Technical Field
The invention relates to the technical field of emergency power supplies, in particular to an emergency power supply state monitoring method.
Background
The emergency power supply is a temporary power supply device which immediately provides power for loads such as lighting equipment, instrument equipment, household appliances and other important electric equipment under the condition of sudden loss of mains supply, and is used for ensuring that the important electric equipment such as emergency lighting equipment, an elevator, fire-fighting alarm equipment and the like can be continuously supplied with power and guaranteeing the life and property safety of people. As power technology advances, the frequency of interruption of mains supply failures or other causes is very low, and thus the management and maintenance of emergency power supplies is often easily overlooked by people. However, once the emergency power supply fails, is damaged or is not timely discovered and replaced due to insufficient available power, very serious consequences may be caused, and the prior art lacks an effective monitoring means for the emergency power supply.
Disclosure of Invention
The invention provides an emergency power supply state monitoring method based on the problems, and the method can be used for timely and effectively monitoring the health condition of an emergency power supply.
In view of this, the present invention provides an emergency power status monitoring method, including:
configuring an off-line monitoring period and a discharging monitoring period of the emergency power supply, wherein the off-line monitoring period is smaller than the discharging monitoring period;
performing an initialization operation on the emergency power supply;
when the emergency power supply is in an off-line state, taking the off-line monitoring period as a sampling period to obtain an off-line voltage value of the emergency power supply;
determining the power failure electric quantity of the emergency power supply in an off-line state according to the off-line voltage value of the emergency power supply;
when the off-line state time of the emergency power supply is greater than or equal to the discharge monitoring period, connecting the emergency power supply to a load, and disconnecting a mains supply of the load to enable the emergency power supply to enter a discharge state;
when the residual capacity of the emergency power supply is smaller than or equal to a preset first threshold value, connecting the load to a mains supply, and disconnecting the emergency power supply from the load so as to enable the emergency power supply to enter an offline state;
charging the emergency power supply until the emergency power supply is in a full power state;
acquiring the actual capacity of the fully charged emergency power supply;
and when the health degree of the emergency power supply is smaller than or equal to a preset second threshold value, sending monitoring early warning information, wherein the health degree of the emergency power supply is a percentage value of the actual capacity of the emergency power supply compared with the rated capacity of the emergency power supply.
Further, in the method for monitoring the state of the emergency power supply, the step of performing an initialization operation on the emergency power supply specifically includes:
charging the emergency power supply until the emergency power supply is in a full power state;
acquiring an initial full-charge voltage value V of the fully charged emergency power supply 0 ；
Carrying out constant-current deep discharge on the emergency power supply;
obtaining an initial capacity of the emergency power supply
The voltage value of the emergency power supply corresponding to the moment of t =0 is an initial full-electricity voltage value V 0 Time of T = T L Corresponding to the time when the voltage value of the emergency power supply is reduced to a preset cut-off voltage V L At the time of (1), I is a discharge current;
obtaining an initial health of the emergency power supply
Wherein C N Is the rated capacity of the emergency power supply.
Further, in the method for monitoring the status of the emergency power supply, the step of performing an initialization operation on the emergency power supply further includes:
configuring a voltage sampling period;
in the process of deep discharging of the emergency power supply, sampling the voltage value of the emergency power supply in the voltage sampling period to obtain a voltage sequence V 0 ，V 1 ，V 2 ，…，V n ]And a corresponding sequence of sampling instants t 0 ，t 1 ，t 2 ，…，t n ]In which V is n ＝V L ；
Acquiring the residual electric quantity of the emergency power supply corresponding to each sampling moment to obtain a residual electric quantity sequence [ SOC ] 0 ，SOC 1 ，SOC 2 ，…，SOC n ]；
And fitting an SOC-V function SOC = f (V) according to the voltage sequence and the residual charge sequence.
Further, in the method for monitoring the state of the emergency power supply, the step of obtaining the remaining power of the emergency power supply corresponding to each sampling moment to obtain the remaining power sequence specifically includes:
in the process of deep discharging of the emergency power supply, the discharging electric quantity of the emergency power supply corresponding to each sampling moment is obtained
Wherein i ∈ [1, n ]]；
According to the initial capacity C of the emergency power supply 0 And calculating the residual electric quantity of the emergency power supply corresponding to each sampling moment by using the discharge electric quantity
Further, in the method for monitoring the state of the emergency power supply, the step of determining the power-down capacity of the emergency power supply during the offline state according to the offline voltage value of the emergency power supply specifically includes:
obtaining an off-line voltage value V of the emergency power supply according to the SOC-V function off Corresponding SOC off ＝f(V off )；
Calculating to obtain the power failure electric quantity C of the emergency power supply during the off-line state off ＝C 0 ·(1-SOC off )。
Further, in the method for monitoring the state of the emergency power supply, the method further includes:
calculating the average power-down capacity of the emergency power supply during the off-line state
Wherein T is off The duration time of the off-line state of the emergency power supply is day;
when the average power-down capacity is equal to the average power-down capacity
When the value is larger than a preset fourth threshold value, the offline monitoring period is adjusted to enable the offline monitoring period to be larger than the preset fourth threshold value
Wherein C lim Is the fourth threshold value, T off-cycle For offline monitoring of period, T 'before tuning' off-cycle And adjusting the off-line monitoring period.
Further, in the method for monitoring the state of the emergency power supply, the method further includes:
calculating the average power-down electric quantity of the emergency power supply during the off-line state
Wherein T is off The duration time of the off-line state of the emergency power supply is day;
when the average power-down electric quantity
When the discharge voltage is larger than a preset fourth threshold value, adjusting the discharge monitoring period to enable the discharge monitoring period to be larger than the preset fourth threshold value
Wherein C is lim Is the fourth threshold.
Further, in the method for monitoring the state of the emergency power supply, after the step of connecting the emergency power supply to a load and disconnecting a mains supply of the load to enable the emergency power supply to enter a discharge state when the offline state time of the emergency power supply is greater than or equal to the discharge monitoring period, the method further includes:
obtaining the real-time discharge current value I of the emergency power supply t ；
Calculating the real-time discharge capacity of the emergency power supply
Wherein the time T =0 corresponds to the time of starting the discharge of the emergency power supply, and T = T s The time corresponds to the time when the residual capacity of the emergency power supply is less than or equal to a preset first threshold value.
Further, in the method for monitoring the state of the emergency power supply, the step of acquiring the actual capacity of the fully charged emergency power supply specifically includes:
acquiring a full-charge voltage value V of the fully charged emergency power supply F ；
Obtaining the full-electricity voltage value V of the emergency power supply according to the SOC-V function F Corresponding SOC F ＝f(V F )；
Calculating to obtain the actual capacity C of the fully charged emergency power supply F ＝C 0 ·(1-SOC F )。
Further, in the method for monitoring the state of the emergency power supply, after the step of obtaining the actual capacity of the fully charged emergency power supply, the method further includes:
calculating the health degree of the emergency power supply according to the actual capacity of the emergency power supply after being fully charged
The invention provides an emergency power supply state monitoring method, which comprises the steps of obtaining an offline voltage value of an emergency power supply by taking an offline monitoring period as a sampling period when the emergency power supply is in an offline state, determining the power failure electric quantity of the emergency power supply in the offline state according to the offline voltage value of the emergency power supply, connecting the emergency power supply to a load and disconnecting a mains supply of the load when the offline state time of the emergency power supply is greater than or equal to a discharge monitoring period so as to enable the emergency power supply to enter a discharge state, connecting the load to the mains supply and disconnecting the emergency power supply from the load when the ratio of the discharge electric quantity of the emergency power supply to the actual capacity of the emergency power supply is greater than or equal to a preset first threshold, charging the emergency power supply until the emergency power supply is in a full-state, obtaining the actual capacity of the emergency power supply after the emergency power supply is fully charged, and sending monitoring early warning information when the health degree of the emergency power supply is less than or equal to a preset second threshold, so that the health condition of the emergency power supply can be effectively monitored in time.
Drawings
Fig. 1 is a flowchart of an emergency power status monitoring method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a monitoring cycle of an emergency power status monitoring method according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention, taken in conjunction with the accompanying drawings and detailed description, is set forth below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. The terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the specification, reference to "one embodiment," "some embodiments," "a specific embodiment," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
An emergency power state monitoring method according to some embodiments of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an emergency power status monitoring method, including:
configuring an off-line monitoring period and a discharge monitoring period of the emergency power supply, wherein the off-line monitoring period is smaller than the discharge monitoring period;
performing an initialization operation on the emergency power supply;
when the emergency power supply is in an off-line state, taking the off-line monitoring period as a sampling period to obtain an off-line voltage value of the emergency power supply;
determining the power failure electric quantity of the emergency power supply in an off-line state according to the off-line voltage value of the emergency power supply;
when the off-line state time of the emergency power supply is greater than or equal to the discharge monitoring period, connecting the emergency power supply to a load, and disconnecting a mains supply of the load to enable the emergency power supply to enter a discharge state;
when the residual electric quantity of the emergency power supply is smaller than or equal to a preset first threshold value, connecting the load to a mains supply, and disconnecting the emergency power supply from the load to enable the emergency power supply to enter an off-line state;
charging the emergency power supply until the emergency power supply is in a full power state;
acquiring the actual capacity of the fully charged emergency power supply;
and when the health degree of the emergency power supply is smaller than or equal to a preset second threshold value, sending monitoring early warning information, wherein the health degree of the emergency power supply is a percentage value of the actual capacity of the emergency power supply compared with the rated capacity of the emergency power supply.
Specifically, the offline monitoring period may be configured in units of days, a natural power failure condition of the battery of the emergency power supply is not obvious in the case that the battery health state of the emergency power supply is good, and an offline monitoring period with an appropriate length may be configured to monitor the natural power failure condition of the emergency power supply, for example, the offline monitoring period is configured to be 1 day, so that an emergency power supply monitoring program collects an offline voltage value of the emergency power supply once a day. The discharge monitoring period may be configured in a month unit, for example, in a case where the health status of the battery of the emergency power supply is good, the discharge monitoring period is configured to be 3 months, so that the emergency power supply monitoring program performs a discharge operation on the emergency power supply every 3 months, and after the emergency power supply is fully charged again, obtains health degree data of the battery thereof, so as to determine whether to remind a maintenance person to replace the battery of the emergency power supply according to the health degree of the battery thereof. Preferably, the first threshold may be configured to be a value between 60% and 80%, so that the emergency power supply performs shallow discharging and shallow charging once per discharge monitoring period, on one hand, a fault caused by long-term non-use of the emergency power supply is avoided, and on the other hand, battery life of the emergency power supply is also prevented from being affected by excessive charging and discharging. Preferably, the second threshold may be configured to be a value between 70% and 80%, and when the battery health of the emergency power supply is lower than the second threshold, a maintenance person is reminded to replace the battery of the emergency power supply.
As shown in fig. 2, in the technical solution of the above embodiment, each discharge monitoring period performs a shallow discharge operation on the emergency power supply, then the emergency power supply is fully charged and left standing for a certain time, a full-charge voltage value of the emergency power supply is obtained to obtain an actual capacity and health data of the emergency power supply battery, when the battery health of the emergency power supply is not lower than a preset second threshold, a next monitoring period is entered, otherwise, a monitoring prompt is sent.
Further, in the method for monitoring the state of the emergency power supply, the step of performing an initialization operation on the emergency power supply specifically includes:
charging the emergency power supply until the emergency power supply is in a full power state;
acquiring an initial full-charge voltage value V of the fully charged emergency power supply 0 ；
Carrying out constant-current deep discharge on the emergency power supply;
obtaining an initial capacity of the emergency power supply
The time point of t =0 corresponds to the voltage value of the emergency power supply as an initial full-power voltage value V 0 Time of T = T L Corresponding to the time when the voltage value of the emergency power supply is reduced to a preset cut-off voltage V L At the time of (1), I is a discharge current;
obtaining an initial health of the emergency power supply
Wherein C N Is the rated capacity of the emergency power supply.
Due to individual differences among emergency power supplies and the influence of complex environmental factors, initial data of each emergency power supply, such as a voltage value and initial capacity in a full-power state, are different, after the emergency power supply is installed for the first time, the emergency power supply needs to be initialized once to obtain the initial data, and meanwhile, the emergency power supply with low battery health degree can be prevented from being used unknowingly.
Further, in the method for monitoring the status of the emergency power supply, the step of performing an initialization operation on the emergency power supply further includes:
configuring a voltage sampling period;
in the process of deep discharging of the emergency power supply, sampling the voltage value of the emergency power supply in the voltage sampling period to obtain a voltage sequence V 0 ，V 1 ，V 2 ，…，V n ]And a corresponding sequence of sampling instants t 0 ，t 1 ，t 2 ，…，t n ]In which V is n ＝V L ；
Acquiring the residual electric quantity of the emergency power supply corresponding to each sampling moment to obtain a residual electric quantity sequence [ SOC ] 0 ，SOC 1 ，SOC 2 ，…，SOC n ]；
Fitting an SOC-V function SOC = f (V) according to the voltage sequence and the residual capacity sequence.
In another embodiment of the present invention, the SOC-V function may be a function fitted to a large amount of data previously obtained by testing the same type of emergency power supply.
Further, in the method for monitoring the state of the emergency power supply, the step of obtaining the remaining power of the emergency power supply corresponding to each sampling moment to obtain the remaining power sequence specifically includes:
in the process of deep discharging of the emergency power supply, the discharging electric quantity of the emergency power supply corresponding to each sampling moment is obtained
Wherein i ∈ [1, n ]]；
According to the initial capacity C of the emergency power supply 0 And the discharge electric quantity calculates the residual electric quantity of the emergency power supply corresponding to each sampling moment
Further, in the method for monitoring the state of the emergency power supply, the step of determining the power-down capacity of the emergency power supply during the offline state according to the offline voltage value of the emergency power supply specifically includes:
obtaining an off-line voltage value V of the emergency power supply according to the SOC-V function off Corresponding SOC off ＝f(V off )；
Calculating to obtain the power failure electric quantity C of the emergency power supply in the off-line state off ＝C 0 ·(1-SOC off )。
In the above embodiment, the offline monitoring period is used as a sampling period to sample the offline voltage value of the emergency power supply so as to determine the natural power-down condition of the emergency power supply in the offline state. Let V off(k) For the value of the off-line voltage obtained for the kth sample, C off(k) The total power-down electric quantity of the emergency power supply from the off-line state to the kth sampling moment is the power-down electric quantity delta C of a single sampling period off(k) ＝C off(k) -C off(k-1) When the power-down electric quantity of a single sampling period is delta C off(k) And when the current value is greater than a preset third threshold value, sending monitoring early warning information to remind maintenance personnel to investigate the abnormal power failure reason of the emergency power supply in an off-line state.
Further, in the method for monitoring the state of the emergency power supply, the method further includes:
calculating the average power-down electric quantity of the emergency power supply during the off-line state
Wherein T is off The duration time of the off-line state of the emergency power supply is day;
when the average power-down capacity is equal to the average power-down capacity
When the value is larger than a preset fourth threshold value, the offline monitoring period is adjusted to enable the offline monitoring period to be larger than the preset fourth threshold value
Wherein C is lim Is the fourth threshold value, T off-cycle For offline monitoring of period, T 'before tuning' off-cycle And adjusting the off-line monitoring period.
In the above embodiment, when the power-down electric quantity of a single sampling period is smaller than a preset third threshold value, but the average daily power-down electric quantity is larger than a preset fourth threshold value, the offline monitoring period is adjusted, and the sampling time interval of the offline voltage value is shortened, so that the monitoring frequency of the offline voltage value is increased and the abnormal condition of the emergency power supply is discovered in time under the condition that the natural power-down speed of the emergency power supply is higher but the natural power-down speed of the emergency power supply does not exceed the warning line.
Further, in the method for monitoring the state of the emergency power supply, the method further includes:
calculating the average power-down capacity of the emergency power supply during the off-line state
Wherein T is off The duration of the off-line state of the emergency power supply is in units of days;
when the average power-down electric quantity
When the discharge current is larger than a preset fourth threshold value, adjusting the discharge monitoring period to enable the discharge monitoring period
Wherein C is lim Is the fourth threshold.
In the above embodiment, when the power-down electric quantity of a single sampling period is less than a preset third threshold value, but the average daily power-down electric quantity is greater than a preset fourth threshold value, the discharge monitoring period is adjusted, and the discharge monitoring time interval of the emergency power supply is shortened, so that under the condition that the natural power-down speed of the emergency power supply is higher but does not exceed a warning line, the discharge monitoring frequency is increased to obtain the battery health degree data of the emergency power supply, and the battery health degree of the emergency power supply can be found in time and a monitoring prompt is sent out when the battery health degree of the emergency power supply falls below the second threshold value.
Further, in the method for monitoring the state of the emergency power supply, after the step of connecting the emergency power supply to a load and disconnecting a mains supply of the load to enable the emergency power supply to enter a discharge state when the time of the offline state of the emergency power supply is greater than or equal to the discharge monitoring period, the method further includes:
acquiring the real-time discharge current value I of the emergency power supply t ；
Calculating the real-time discharge capacity of the emergency power supply
Wherein the time T =0 corresponds to the time of starting the discharge of the emergency power supply, and T = T s The time corresponds to the time when the residual electric quantity of the emergency power supply is less than or equal to a preset first threshold value;
acquiring the residual capacity of the emergency power supply
In the technical solution of the above embodiment, when the sum of the natural power-down capacity of the emergency power supply in the offline state and the discharge capacity is higher than a preset value, that is, when the remaining capacity of the emergency power supply is lower than the preset first threshold, the discharge is stopped and the connection between the emergency power supply and the load is disconnected, so that excessive discharge of the emergency power supply due to the natural power-down capacity of the emergency power supply in the offline state being too high or the discharge capacity in the online state being too high is avoided.
Further, in the method for monitoring the state of the emergency power supply, the step of acquiring the actual capacity of the fully charged emergency power supply specifically includes:
acquiring a full-charge voltage value V of the fully charged emergency power supply F ；
Obtaining the full-power voltage value V of the emergency power supply according to the SOC-V function F Corresponding SOC F ＝f(V F )；
Calculating to obtain the actual capacity C of the fully charged emergency power supply F ＝C 0 ·(1-SOC F )。
Further, in the method for monitoring the state of the emergency power supply, after the step of obtaining the actual capacity of the fully charged emergency power supply, the method further includes:
calculating the health degree of the emergency power supply according to the actual capacity of the fully charged emergency power supply
The invention provides an emergency power supply state monitoring method, which comprises the steps of acquiring an offline voltage value of an emergency power supply by taking an offline monitoring period as a sampling period when the emergency power supply is in an offline state, determining the power failure electric quantity of the emergency power supply in the offline state according to the offline voltage value of the emergency power supply, connecting the emergency power supply to a load and disconnecting a mains supply of the load when the offline state time of the emergency power supply is greater than or equal to a discharge monitoring period so as to enable the emergency power supply to enter a discharge state, connecting the load to the mains supply and disconnecting the emergency power supply from the load when the ratio of the discharge electric quantity of the emergency power supply to the actual capacity of the emergency power supply is greater than or equal to a preset first threshold, charging the emergency power supply until the emergency power supply is in a full-charge state, acquiring the actual capacity of the emergency power supply after the emergency power supply is fully charged, and sending monitoring early warning information when the health degree of the emergency power supply is less than or equal to a preset second threshold, so that the health condition of the emergency power supply can be effectively monitored in time.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In accordance with embodiments of the present invention, as set forth above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. An emergency power supply state monitoring method is characterized by comprising the following steps:
configuring an off-line monitoring period and a discharging monitoring period of the emergency power supply, wherein the off-line monitoring period is smaller than the discharging monitoring period;
performing an initialization operation on the emergency power supply;
when the emergency power supply is in an off-line state, taking the off-line monitoring period as a sampling period, and acquiring an off-line voltage value of the emergency power supply;
determining the power failure electric quantity of the emergency power supply during the off-line state according to the off-line voltage value of the emergency power supply;
when the off-line state time of the emergency power supply is greater than or equal to the discharge monitoring period, connecting the emergency power supply to a load, and disconnecting a mains supply of the load to enable the emergency power supply to enter a discharge state;
when the residual capacity of the emergency power supply is smaller than or equal to a preset first threshold value, connecting the load to a mains supply, and disconnecting the emergency power supply from the load so as to enable the emergency power supply to enter an offline state;
charging the emergency power supply until the emergency power supply is in a full power state;
acquiring the actual capacity of the fully charged emergency power supply;
and when the health degree of the emergency power supply is smaller than or equal to a preset second threshold value, monitoring and early warning information is sent out, wherein the health degree of the emergency power supply is a percentage value of the actual capacity of the emergency power supply compared with the rated capacity of the emergency power supply.
2. The method for monitoring the status of an emergency power supply according to claim 1, wherein the step of performing an initialization operation on the emergency power supply specifically comprises:
charging the emergency power supply until the emergency power supply is in a full power state;
obtaining an initial full-electricity voltage value V of the emergency power supply after being fully charged 0 ；
Carrying out constant-current deep discharge on the emergency power supply;
obtaining an initial capacity of the emergency power supply
The time point of t =0 corresponds to the voltage value of the emergency power supply as an initial full-power voltage value V 0 Time of T = T L Corresponding to the time when the voltage value of the emergency power supply is reduced to a preset cut-off voltage V L At the time of (1), I is a discharge current;
obtaining an initial health of the emergency power supply
Wherein C is N Is the rated capacity of the emergency power supply.
3. The emergency power status monitoring method according to claim 2, wherein the step of performing an initialization operation on the emergency power further comprises:
configuring a voltage sampling period;
in the process of deep discharging of the emergency power supply, the voltage value of the emergency power supply is sampled in the voltage sampling period to obtain a voltage sequence [ V ] 0 ，V 1 ，V 2 ，…，V n ]And a corresponding sequence of sampling instants t 0 ，t 1 ，t 2 ，…，t n ]In which V is n ＝V L ；
Acquiring the residual electric quantity of the emergency power supply corresponding to each sampling moment to obtain a residual electric quantity sequence [ SOC ] 0 ，SOC 1 ，SOC 2 ，…，SOC n ]；
Fitting an SOC-V function SOC = f (V) according to the voltage sequence and the residual capacity sequence.
4. The method for monitoring the state of the emergency power supply according to claim 3, wherein the step of obtaining the remaining power of the emergency power supply corresponding to each sampling moment to obtain the remaining power sequence specifically comprises:
in the process of deep discharging of the emergency power supply, the discharging electric quantity of the emergency power supply corresponding to each sampling moment is obtained
Wherein i ∈ [1, n ]]；
According to the initial capacity C of the emergency power supply 0 And the discharge electric quantity calculates the residual electric quantity of the emergency power supply corresponding to each sampling moment
5. The method for monitoring the state of the emergency power supply according to claim 4, wherein the step of determining the power-down capacity of the emergency power supply during the offline state according to the offline voltage value of the emergency power supply specifically comprises:
obtaining an off-line voltage value V of the emergency power supply according to the SOC-V function off Corresponding SOC off ＝f(V off )；
Calculating to obtain the power failure electric quantity C of the emergency power supply during the off-line state off ＝C 0 ·(1-SOC off )。
6. The emergency power status monitoring method according to claim 5, further comprising:
calculating the average power-down electric quantity of the emergency power supply during the off-line state
Wherein T is off The duration of the off-line state of the emergency power supply is in units of days;
when the average power-down capacity is equal to the average power-down capacity
When the value is larger than a preset fourth threshold value, the offline monitoring period is adjusted to enable the offline monitoring period to be larger than the preset fourth threshold value
Wherein C is lim Is the fourth threshold value, T off-cycle For offline monitoring of period, T 'before tuning' off-cycle And adjusting the off-line monitoring period.
7. The emergency power status monitoring method according to claim 5, further comprising:
calculating the average power-down electric quantity of the emergency power supply during the off-line state
Wherein T is off The duration time of the off-line state of the emergency power supply is day;
when the average power-down electric quantity
When the discharge voltage is larger than a preset fourth threshold value, adjusting the discharge monitoring period to enable the discharge monitoring period to be larger than the preset fourth threshold value
Wherein C lim Is the fourth threshold.
8. The method for monitoring the status of an emergency power supply according to claim 3, wherein after the step of connecting the emergency power supply to a load and disconnecting the power supply of the load to enable the emergency power supply to enter the discharging state when the time of the off-line status of the emergency power supply is greater than or equal to the discharging monitoring period, the method further comprises:
acquiring the real-time discharge current value I of the emergency power supply t ；
Calculating the real-time discharge capacity of the emergency power supply
Wherein the time T =0 corresponds to the time of starting the discharge of the emergency power supply, and T = T s The time corresponds to the time when the ratio of the residual capacity of the emergency power supply to the actual capacity of the emergency power supply is less than or equal to a preset first threshold value.
9. The emergency power supply state monitoring method according to claim 8, wherein the step of obtaining the actual capacity of the fully charged emergency power supply specifically comprises:
acquiring a full-charge voltage value V of the fully charged emergency power supply F ；
Obtaining the emergency according to the SOC-V functionFull voltage value V of power supply F Corresponding SOC F ＝f(V F )；
Calculating to obtain the actual capacity C of the fully charged emergency power supply F ＝C 0 ·(1-SOC F )。
10. The emergency power status monitoring method according to claim 9, further comprising, after the step of obtaining the actual capacity of the fully charged emergency power supply:
calculating the health degree of the emergency power supply according to the actual capacity of the fully charged emergency power supply
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