CN113960481A - Energy storage operation detection device, system, method and storage medium - Google Patents
Energy storage operation detection device, system, method and storage medium Download PDFInfo
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Abstract
The invention discloses an energy storage operation and detection device, a system, a method and a storage medium, comprising an alternating current acquisition module, a direct current acquisition module, a battery communication module and a data processing module, wherein the alternating current acquisition module is used for acquiring alternating current signals at the input end of an isolation transformer; the direct current acquisition module is used for acquiring a direct current signal at the output end of the power conversion system; the battery communication module is used for acquiring charge and discharge signals of the energy storage battery; the data processing module is respectively connected with the alternating current acquisition module, the direct current acquisition module and the battery communication module, and the data processing module is used for carrying out data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charge-discharge signal, carrying out list output on the analyzed data and carrying out alarming on abnormity of the energy storage battery. The energy storage operation and detection device is used as a third-party device independent of the battery energy storage system, and is used for carrying out real-time signal acquisition and data analysis on the battery energy storage system, and carrying out list output on the analyzed data and alarming the abnormity of the energy storage battery.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to an energy storage operation and inspection device, system, method and storage medium.
Background
The battery energy storage system is one of key equipment in the field of new energy and also equipment which is easy to cause safety accidents. At present, a battery energy storage system only has a monitoring system, and the monitoring system collects operation parameters provided by key equipment (such as a power conversion system PCS) of the battery energy storage system in a communication manner and stores the operation parameters in a background server, so that an engineer can periodically retrieve data to analyze the operation state of the energy storage equipment. The monitoring system has the following disadvantages: 1) the key equipment of the battery energy storage system needs to be monitored, and the data provided by the key equipment has certain deviation; 2) the monitoring system monitors in a sampling mode, and cannot monitor millisecond-level parameters; 3) the skill level and the working attitude of the engineer can affect the quality of the analysis report.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an energy storage operation and detection device, system, method and storage medium, which can carry out real-time signal acquisition, data analysis, data output and abnormity alarm on a battery energy storage system.
In a first aspect, an energy storage operation and detection device according to an embodiment of the present invention is applied to a battery energy storage system, where the battery energy storage system includes an isolation transformer, a power conversion system, and an energy storage battery, which are connected in sequence, and includes:
the alternating current acquisition module is used for acquiring alternating current signals at the input end of the isolation transformer;
the direct current acquisition module is used for acquiring a direct current signal at the output end of the power conversion system;
the battery communication module is used for acquiring charge and discharge signals of the energy storage battery;
and the data processing module is respectively connected with the alternating current acquisition module, the direct current acquisition module and the battery communication module, and is used for carrying out data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charging and discharging signal, carrying out list output on the analyzed data and carrying out alarm on abnormity of the energy storage battery.
The energy storage operation and detection device provided by the embodiment of the invention at least has the following beneficial effects:
the energy storage operation and detection device provided by the embodiment of the invention is used as a third-party device independent of the battery energy storage system, and is used for carrying out real-time signal acquisition and data analysis on the battery energy storage system, carrying out list output on the analyzed data and carrying out alarming on the abnormity of the energy storage battery, so that the precision and accuracy of signal acquisition can be improved, and the quality of an output report can be ensured.
In a second aspect, an energy storage inspection system according to an embodiment of the present invention includes:
the battery energy storage system comprises an isolation transformer, a power conversion system and an energy storage battery which are connected in sequence;
the alternating current acquisition module is arranged at the input end of the isolation transformer and is used for acquiring an alternating current signal at the input end of the isolation transformer;
the direct current acquisition module is connected with the output end of the power conversion system and is used for acquiring a direct current signal at the output end of the power conversion system;
the battery communication module is in communication connection with the energy storage battery and is used for acquiring charge and discharge signals of the energy storage battery;
and the data processing module is respectively connected with the alternating current acquisition module, the direct current acquisition module and the battery communication module, and is used for carrying out data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charging and discharging signal, carrying out list output on the analyzed data and carrying out alarm on abnormity of the energy storage battery.
The energy storage operation and inspection system provided by the embodiment of the invention at least has the following beneficial effects:
in the energy storage operation and detection system, the energy storage operation and detection device is used as a third-party device independent of the battery energy storage system, real-time signal acquisition and data analysis are carried out on the battery energy storage system, list output is carried out on the analyzed data, alarming of abnormity of the energy storage battery is carried out, the accuracy and the precision of signal acquisition can be improved, and the quality of output reports is ensured.
In a third aspect, the energy storage operation and detection method according to the embodiment of the present invention is applied to a battery energy storage system, where the battery energy storage system includes an isolation transformer, a power conversion system, and an energy storage battery, which are connected in sequence, and includes the steps of:
acquiring an alternating current signal at the input end of the isolation transformer, a direct current signal at the output end of the power conversion system and a charge and discharge signal of the energy storage battery;
performing data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charging and discharging signal to obtain analysis data;
and outputting the analysis data in a list, and alarming the abnormity of the energy storage battery.
The energy storage operation and detection method provided by the embodiment of the invention at least has the following beneficial effects:
the energy storage operation and inspection method provided by the embodiment of the invention can be used for carrying out real-time signal acquisition and data analysis on the battery energy storage system, carrying out list output on the analyzed data and carrying out alarm on the abnormity of the energy storage battery, so that the precision and accuracy of signal acquisition can be improved, and the quality of an output report can be ensured.
According to some embodiments of the present invention, the performing data analysis on the energy storage battery according to the ac signal, the dc signal, and the charging and discharging signal to obtain analysis data includes:
determining an output power curve of the power conversion system according to the direct current signal;
determining a first time and a second time in the output power curve, wherein the first time is used for representing the time when the power of the output power curve starts to change, and the second time is used for representing the time when the power change in the output power curve tends to be stable;
determining a first adjustment response time according to the first time and the second time;
and determining second regulation response time according to the first regulation response time based on national standard test specifications.
According to some embodiments of the invention, the determining a second adjustment response time from the first adjustment response time based on a national standard test specification comprises:
determining a first power value corresponding to the first time in the output power curve;
determining a second power value of the output power curve in a stable state;
determining a national standard test range according to the first power value and the second power value, wherein the national standard test range has a first boundary value and a second boundary value which have equal absolute values, and the signs of the first boundary value and the second boundary value are opposite;
intercepting a data segment in the national standard test range, wherein the data segment has a third boundary value and a fourth boundary value;
determining a projection relation coefficient according to the first power value, the second power value, the first boundary value and the second boundary value;
and determining the second adjustment response time according to the first time, the second time and the projection relation coefficient.
According to some embodiments of the invention, the first adjustment response time is equal to a difference between the second time instant and the first time instant, and the second adjustment response time is a product of the first adjustment response time and the projection relationship coefficient.
According to some embodiments of the present invention, the performing data analysis on the energy storage battery according to the ac signal, the dc signal, and the charging and discharging signal to obtain analysis data includes:
determining a first charging time sequence and a first discharging time sequence according to the charging and discharging signals;
carrying out binarization processing on the first charging time sequence and the first discharging time sequence to obtain a second charging time sequence and a second discharging time sequence;
accumulating a plurality of second charging time sequences to obtain a third charging time sequence;
accumulating a plurality of second discharge time sequences to obtain a third discharge time sequence;
and determining the consistency of the energy storage battery according to the third charging time sequence and the third discharging time sequence.
According to some embodiments of the present invention, the binarizing the first charging time series and the first discharging time series to obtain a second charging time series and a second discharging time series includes:
sequencing the first charging time sequence to obtain a first charging time subsequence;
setting data in the first charging time subsequence within a preset first proportion range to be one, and setting the rest data to be zero to obtain a second charging time subsequence;
according to the second charging time subsequence, setting one or zero to the corresponding data in the first charging time sequence to obtain a second charging time sequence;
sequencing the first discharge time sequence to obtain a first discharge time subsequence;
setting data in a preset second proportion range in the first discharging time subsequence to be one and setting other data to be zero to obtain a second discharging time subsequence;
and setting the corresponding data in the first discharge time sequence to be one or zero according to the second discharge time subsequence to obtain the second discharge time sequence.
According to some embodiments of the invention, said determining the consistency of the energy storage battery according to the third charging time series and the third discharging time series comprises:
determining that the consistency of the energy storage battery is abnormal under the condition that the data in the third charging time sequence is larger than a preset first threshold;
or determining that the consistency of the energy storage battery is abnormal under the condition that the data in the third discharging time sequence is larger than a preset second threshold.
In a fourth aspect, according to the computer storage medium of the embodiment of the present invention, the computer storage medium stores a computer program, and the computer program is executed by a processor to implement the energy storage operation and detection method.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic block diagram of an energy storage operation inspection system according to an embodiment of the invention;
FIG. 2 is a flow chart illustrating steps of an energy storage operation method according to an embodiment of the invention;
FIG. 3 is a graph of output power of a power conversion system according to an embodiment of the present invention;
FIG. 4 is a graph of the output power curve shown in FIG. 3 projected to a national standard test specification;
fig. 5 is a charge-discharge curve diagram of the energy storage battery according to the embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means one or more, "a plurality" means two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and "greater than", "lower than", "inner", etc. are understood as including the present number. If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.
In the description of the present invention, unless otherwise explicitly limited, terms such as "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solutions.
In the description of the present invention, the consecutive reference numbers of the method steps are for convenience of examination and understanding, and the implementation order between the steps is adjusted without affecting the technical effect achieved by the technical solution of the present invention by combining the whole technical solution of the present invention and the logical relationship between the steps.
Example 1
Referring to fig. 1, the present embodiment discloses an energy storage operation and inspection device, which is applied to a battery energy storage System 100, the battery energy storage System 100 includes an isolation transformer 110, a Power conversion System 120(Power converter System, PCS) and an energy storage battery 130, which are connected in sequence, the energy storage operation and inspection device includes an ac acquisition module 210, a dc acquisition module 220, a battery communication module 230 and a data processing module 240, and the data processing module 240 is connected to the ac acquisition module 210, the dc acquisition module 220 and the battery communication module 230, respectively. The alternating current acquisition module 210 is configured to acquire an alternating current signal at an input end of the isolation transformer 110, the direct current acquisition module 220 is configured to acquire a direct current signal at an output end of the power conversion system 120, the battery communication module 230 is configured to acquire a charge-discharge signal of the energy storage battery 130, and the data processing module 240 is configured to perform data analysis on the energy storage battery 130 according to the alternating current signal, the direct current signal, and the charge-discharge signal, perform list output on the analyzed data, and perform alarm on abnormality of the energy storage battery 130.
In this embodiment, the ac acquisition module 210 performs signal acquisition by using a current mutual inductance technology, for example, the ac acquisition module 210 includes a current transformer and a current limiting resistor, the current transformer is connected to the data processing module 240 through the current limiting resistor, and the current transformer monitors the ac current at the input end of the isolation transformer 110 in real time in a mutual inductance manner to obtain an ac current signal. It is contemplated that the data processing module 240 may also determine ac voltage, ac power, active power, reactive power, etc. at the input of the isolation transformer 110 based on the ac current signal and the resistance of the current limiting resistor.
The dc collection module 220 Of this embodiment employs a current sampling circuit, and can collect a dc current signal, it should be understood that the dc collection module 220 may further employ a voltage sampling circuit such as a voltage sampling resistor and a voltage division sampling circuit, the data processing module 240 may determine a dc voltage, a dc power, a primary frequency modulation response time, a reactive power regulation response time and a PCS regulation response time at the output end Of the power conversion system 120, a Charge/discharge electric quantity and an SOC (State Of Charge) value Of the energy storage battery 130, and the like according to the dc current signal, and the data processing module 240 may further determine a maximum power point and an energy conversion efficiency, and the like according to the ac signal and the dc signal.
The battery communication module 230 comprises an RS485 communication unit and a CAN communication unit, and the energy storage battery 130 is in data communication with the data processing module 240 through the battery communication module 230. The battery communication module 230 of this embodiment further includes a storage unit, and the storage unit can meet the storage capacity requirement of the energy storage battery 130 for 180 days, so as to facilitate historical data query and analysis on the energy storage battery 130. The data processing module 240 may determine the battery efficiency of the energy storage battery 130 according to the charging signal and the discharging signal, specifically, the battery efficiency is equal to 100% multiplied by the quotient of the discharging power and the charging power of the energy storage battery 130, wherein the charging power of the energy storage battery 130 may be determined by the charging voltage and the charging current in the charging signal, and the discharging power may be determined by the discharging voltage and the discharging current in the discharging signal. In addition, the data processing module 240 may also be used to determine whether the energy storage battery 130 is an abnormal battery, the utilization rate of equipment, the down time, and the like. To avoid redundancy, please refer to embodiment 3 for specific steps of the PCS adjusting the response time and determining whether the energy storage battery 130 is an abnormal battery.
The energy storage operation and detection device of the embodiment is used as a third-party device independent of the battery energy storage system 100, and performs non-stop real-time monitoring on the battery energy storage system 100, the energy storage operation and detection device itself does not need to be monitored, and the acquired signals are not directly derived from the isolation transformer 110 and the power conversion system 120, are weakly related to the performance of the isolation transformer 110 and the power conversion system 120, and are beneficial to improving the accuracy of signal acquisition.
Because the existing Battery Management System (BMS) outputs only a protection function based on the collection of the temperature and the electrical parameters of the energy storage Battery 130, and the signal collection density within a certain time is limited, a malfunction is easily triggered due to a single signal when the protection action is determined. Compared with the existing battery management system, the battery management system only outputs continuous analog signals for protecting the signals acquired by the energy storage operation and detection device through the alternating current acquisition module 210 and the direct current acquisition module 220, so that millisecond-level parameters can be monitored.
The energy storage operation and inspection device performs real-time signal acquisition and data analysis on the battery energy storage system 100, and performs list output on the analyzed data, so that an analysis report with a uniform format can be automatically generated, the content of the analysis report is irrelevant to the technical level and the working attitude of an engineer, and the quality of the analysis report is favorably ensured. When the energy storage battery 130 is analyzed to be abnormal, the data analysis module can also give an alarm for the abnormality of the energy storage battery 130, so that early warning of the energy storage battery 130 is realized, and a fire caused by thermal runaway is avoided.
Example 2
Referring to fig. 1, the present embodiment discloses an energy storage operation and inspection system, which includes a battery energy storage system 100, an ac acquisition module 210, a dc acquisition module 220, a battery communication module 230, and a data processing module 240, wherein the battery energy storage system 100 includes an isolation transformer 110, a power conversion system 120, and an energy storage battery 130, which are connected in sequence, the ac acquisition module 210 is disposed at an input end of the isolation transformer 110 and is used for acquiring an ac signal at an input end of the isolation transformer 110, the dc acquisition module 220 is connected to an output end of the power conversion system 120 and is used for acquiring a dc signal at an output end of the power conversion system 120, the battery communication module 230 is connected to the energy storage battery 130 and is used for acquiring a charging and discharging signal of the energy storage battery 130, the data processing module 240 is respectively connected to the ac acquisition module 210, the dc acquisition module 220, and the battery communication module 230, and the data processing module 240 is used for acquiring, according to the ac signal, the dc signal, the energy storage battery 130, and the data processing module 240, The direct current signal and the charge and discharge signal perform data analysis on the energy storage battery 130, perform list output on the analyzed data, and perform alarm on abnormality of the energy storage battery 130.
In the energy storage operation and detection system, the alternating current acquisition module 210, the direct current acquisition module 220, the battery communication module 230 and the data processing module 240 can form an energy storage operation and detection device independent of the battery energy storage system 100, the energy storage operation and detection device is used as a third-party device independent of the battery energy storage system 100, the battery energy storage system 100 is monitored in real time without shutdown, the energy storage operation and detection device does not need to be monitored, and the accuracy of signal acquisition is favorably improved. The signals acquired by the energy storage operation and detection device through the alternating current acquisition module 210 and the direct current acquisition module 220 are continuous analog signals, and millisecond-level parameters can be monitored. The energy storage operation and inspection device performs real-time signal acquisition and data analysis on the battery energy storage system 100, and performs list output on the analyzed data, so that an analysis report with a uniform format can be automatically generated, the content of the analysis report is irrelevant to the technical level and the working attitude of an engineer, and the quality of the analysis report is favorably ensured. When the energy storage battery 130 is analyzed to be abnormal, the data analysis module can also give an alarm for the abnormality of the energy storage battery 130, so that early warning of the energy storage battery 130 is realized, and a fire caused by thermal runaway is avoided. It should be noted that, for avoiding redundancy, reference may be made to embodiment 1 for what is not referred to in this embodiment.
Example 3
Referring to fig. 2, an embodiment of the present invention discloses an energy storage operation and inspection method, which is applied to a battery energy storage system 100, and referring to fig. 1, the battery energy storage system 100 includes an isolation transformer 110, a power conversion system 120, and an energy storage battery 130, which are connected in sequence, and includes the steps of:
s100, acquiring an alternating current signal at the input end of the isolation transformer 110, a direct current signal at the output end of the power conversion system 120 and a charging and discharging signal of the energy storage battery 130.
In this embodiment, the ac acquisition module 210 acquires an ac signal at an input end of the isolation transformer 110, the dc acquisition module 220 acquires a dc signal at an output end of the power conversion system 120, and the battery communication module 230 acquires charge and discharge signals of the energy storage battery 130, where for avoiding redundancy, reference may be made to embodiment 1 for specific descriptions of the ac acquisition module 210, the dc acquisition module 220, and the battery communication module 230. The ac signal of this embodiment does not directly originate from the isolation transformer 110, and the dc signal does not directly originate from the power conversion system 120, so that the signal is weakly related to the performance of the isolation transformer 110 or the power conversion system 120, the influence of the performance of the isolation transformer 110 or the power conversion system 120 on the signal is reduced, and the signal accuracy is improved.
And S200, performing data analysis on the energy storage battery 130 according to the alternating current signal, the direct current signal and the charge and discharge signal to obtain analysis data.
For example, the obtained alternating current signal is an alternating current signal, and alternating voltage, alternating power, active power, reactive power and the like can be determined through the alternating current signal; the obtained direct current signal is a direct current signal, and the direct current voltage, the direct current power, the primary frequency modulation response time, the reactive power regulation response time and the PCS regulation response time output by the power conversion system 120 and the charge-discharge electric quantity and the SOC value of the energy storage battery 130 can be determined through the direct current signal; determining a maximum power point and energy conversion efficiency through the alternating current signal and the direct current signal; whether the energy storage battery 130 is an abnormal battery, the utilization rate of equipment, the down time and the like can be determined through the charging and discharging signals. The above analysis data is a key technical index of the battery energy storage system 100 in the operation process. Through the automatic acquisition of the signals and the automatic analysis of key technical indexes, the automation of the signal acquisition and the data analysis can be realized, the influence of the technical level and the working attitude of an engineer on the data analysis is reduced, and the data analysis accuracy is improved.
And S300, outputting the analysis data in a list, and giving an alarm of the abnormality of the energy storage battery 130.
The embodiment performs list output on the analyzed data, can automatically generate an analysis report with a uniform format, has no relation between the content of the analysis report and the technical level and the working attitude of an engineer, and is favorable for ensuring the quality of the analysis report. When the energy storage battery 130 is analyzed to be abnormal, the data analysis module can also give an alarm for the abnormality of the energy storage battery 130, so that early warning of the energy storage battery 130 is realized, and a fire caused by thermal runaway is avoided.
The step S200 of performing data analysis on the energy storage battery 130 according to the ac signal, the dc signal, and the charge and discharge signal to obtain analysis data includes the steps of:
s210, determining an output power curve of the power conversion system 120 according to the direct current signal;
s220, determining a first time and a second time in the output power curve, wherein the first time is used for representing the time when the power of the output power curve starts to change, and the second time is used for representing the time when the power change in the output power curve tends to be stable;
s230, determining a first adjusting response time according to the first time and the second time;
and S240, determining second adjustment response time according to the first adjustment response time based on national standard test specifications.
Referring to fig. 3, fig. 3 (a) and (b) show output power curves of the power conversion system 120, wherein the power values of the output power curve shown in fig. 3 (a) gradually become stable from small to large, a time T1 in fig. 3 is a first time, a time T2 is a second time, a time T3 is a time when the output power curve is in a stable state, the power value corresponding to the time T1 is W1, and the power value corresponding to the time T3 is T3. Similarly, the power value of the output power curve shown in fig. 3 (b) is gradually decreased and becomes stable.
Specifically, step S240 is to determine a second adjustment response time according to the first adjustment response time based on the national standard test specification, and includes the steps of:
s241, determining a first power value corresponding to a first moment in an output power curve;
s242, determining a second power value of the output power curve in a stable state;
s243, determining a national standard test range according to the first power value and the second power value, wherein the national standard test range has a first boundary value and a second boundary value which have the same absolute value, and the signs of the first boundary value and the second boundary value are opposite;
s244, intercepting a data segment in a national standard test range, wherein the data segment has a third boundary value and a fourth boundary value, and in the embodiment, the interception of the data segment is performed by taking 0.25 times of the first boundary value as a unit;
s245, determining a projection relation coefficient according to the first power value, the second power value, the third boundary value and the fourth boundary value;
and S246, determining a second adjusting response time according to the first time, the second time and the projection relation coefficient.
Referring to fig. 3 and 4, fig. 4 (a) is an output power curve projected from the output power curve of fig. 3 (a) to a national standard test specification. The first power value is the power value W1 corresponding to the time T1, the second power value is the power value W2 corresponding to the time T3, and the interval of power change in fig. 3 (a) is [ W1, W2 ]]The interval [ W1, W2 ]]The range projected to the national standard test standard is [ -P ]N，PN]Cut off the whole 0.25PNThe data segment and interval are marked as [ P1, P2 ]]Then the first regulation response time DeltaTW1～W2＝T2-T1Second regulation response time DeltaTP1～P2＝ηΔTW1～W2Where η is a projected relationship coefficient, and η may be determined according to a projected relationship between power value W1, power value W2, power value P1, and power value P2. Similarly, (B) of fig. 4 is an output power curve obtained by projecting the output power curve of (B) of fig. 3 to the national standard test specification, wherein time interval a represents the regulation response time and time interval B represents the operation stabilization time in (a) and (B) of fig. 4. The determination method of the first adjustment response time and the second adjustment response time of the embodiment is independent of the acquisition density of the acquired signals, and can reduce the influence of the single signal on the calculation result.
The step S200 of performing data analysis on the energy storage battery 130 according to the ac signal, the dc signal, and the charge and discharge signal to obtain analysis data includes the steps of:
s250, determining a first charging time sequence and a first discharging time sequence according to the charging and discharging signals;
s260, performing binarization processing on the first charging time sequence and the first discharging time sequence to obtain a second charging time sequence and a second discharging time sequence;
s270, accumulating the plurality of second charging time sequences to obtain a third charging time sequence;
s280, accumulating a plurality of second discharge time sequences to obtain a third discharge time sequence;
and S290, determining the consistency of the energy storage battery 130 according to the third charging time sequence and the third discharging time sequence.
The energy storage battery 130 includes a plurality of battery packs, and the serial numbers of the plurality of battery packs are 1, 2, …, and N in sequence, and since there may be differences in characteristics of different battery packs, for example, capacity parameters of the battery packs, materials of the battery packs, and the like, abnormalities may occur in the operation processes of the different battery packs. Referring to fig. 5, (a) of fig. 5 shows a voltage-time curve of the battery pack during charging, and (b) of fig. 5 shows a voltage-time curve of the energy storage battery 130 during discharging, in (a) of fig. 5, a time T21 is a charging start time, a time T22 is a charging stop time, in (b) of fig. 5, a time T31 is a discharging start time, and a time T32 is a discharging stop time, so that the charging time T of the battery pack is calculated according to national standardschargeT22-T21, discharge time T of battery packdischargeT32-T31. The energy storage battery 130 includes N battery packs, the charging time of the N battery packs forms a first charging time sequence, and the discharging time of the N battery packs forms a first discharging time sequence. In this embodiment, the binarization processing is performed on the first charging time series and the first discharging time series, so that the processing of data can be simplified.
Step S260, performing binarization processing on the first charging time sequence and the first discharging time sequence to obtain a second charging time sequence and a second discharging time sequence, including the steps of:
s261, sequencing the first charging time sequence to obtain a first charging time subsequence;
s262, setting data in a preset first proportion range in the first charging time subsequence to be one and setting the rest data to be zero to obtain a second charging time subsequence;
s263, setting the corresponding data in the first charging time sequence to be one or zero according to the second charging time subsequence to obtain a second charging time sequence;
s264, sequencing the first discharging time sequence to obtain a first discharging time subsequence;
s265, setting data in the first discharging time subsequence, which are located in a preset second proportion range, to be one, and setting the rest of data to be zero to obtain a second discharging time subsequence;
and S266, setting the corresponding data in the first discharge time sequence to be one or zero according to the second discharge time subsequence to obtain a second discharge time sequence.
For example, the energy storage battery 130 includes N battery packs, the serial numbers of the battery packs are sequentially 1, 2, 3 …, and N, and are sorted from the charging time or the discharging time to the small, so as to obtain a first charging time subsequence and a first discharging time subsequence, where the maximum 10% and the minimum 10% of data in the first charging time subsequence are set to one, and the rest of data are set to zero, for example, the serial numbers of the battery packs arranged in the first 10% of the first charging time subsequence are sequentially 5, 3, and 6, and the serial numbers of the battery packs arranged in the last 10% are sequentially 7, 11, and 15, so as to set the data corresponding to the battery packs with serial numbers of 3, 5, 6, 7, 11, and 15 to one, and the data corresponding to the rest of the battery packs are set to zero, so as to obtain a second charging time subsequence; similarly, the data of the maximum 10% and the minimum 10% in the first discharging time subsequence is set to be one, and the rest data are set to be zero, so that a second discharging time subsequence is obtained. Because the data corresponding to the battery packs with the serial numbers of 3, 5, 6, 7, 11 and 15 in the second charging time subsequence are set to be one and the data corresponding to the rest of the battery packs are set to be zero, the data corresponding to the battery packs with the serial numbers of 3, 5, 6, 7, 11 and 15 in the first charging time sequence are set to be one and the data corresponding to the rest of the battery packs are set to be zero, and the second charging time sequence is obtained.
Step S290, determining the consistency of the energy storage battery 130 according to the third charging time sequence and the third discharging time sequence, including the steps of:
determining that the consistency of the energy storage battery 130 is abnormal when the data in the third charging time sequence is larger than a preset first threshold;
alternatively, in the case where the data in the third discharge time series is greater than the preset second threshold, it is determined that the consistency of the energy storage battery 130 is abnormal.
For example, table 1 shows that the second charging time series of N battery packs in the energy storage battery 130 is accumulated to obtain the third charging time series after 30 times. The second charging time sequence is binary data, and the third charging time sequence comprises serial numbers 1, 2, 3 … and cumulative values corresponding to the N battery packs. Assuming that the accumulated value of the battery pack with the serial number 2 is greater than the preset first threshold, it may be determined that there is a difference between the charging performance of the battery pack and other battery packs, that is, the consistency of the energy storage battery 130 is abnormal, and the battery pack is marked and alarmed. In the embodiment, the quality of the battery packs is judged by performing statistical analysis on the charging time or the discharging time of the plurality of battery packs, the method is simple and easy to implement and is weakly related to the battery characteristics, the potential hazard of abnormality of the energy storage battery 130 can be timely found in the operation process of the battery energy storage system 100, and the accident prevention is facilitated.
TABLE 1
Example 4
The embodiment discloses a computer storage medium, which stores a computer program, and the computer program is executed by a processor to implement the energy storage operation and detection method.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides a device is examined in energy storage fortune is applied to battery energy storage system, battery energy storage system is including the isolation transformer, power conversion system and the energy storage battery who connects gradually, its characterized in that includes:
the alternating current acquisition module is used for acquiring alternating current signals at the input end of the isolation transformer;
the direct current acquisition module is used for acquiring a direct current signal at the output end of the power conversion system;
the battery communication module is used for acquiring charge and discharge signals of the energy storage battery;
and the data processing module is respectively connected with the alternating current acquisition module, the direct current acquisition module and the battery communication module, and is used for carrying out data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charging and discharging signal, carrying out list output on the analyzed data and carrying out alarm on abnormity of the energy storage battery.
2. An energy storage operation inspection system, comprising:
the battery energy storage system comprises an isolation transformer, a power conversion system and an energy storage battery which are connected in sequence;
the alternating current acquisition module is arranged at the input end of the isolation transformer and is used for acquiring an alternating current signal at the input end of the isolation transformer;
the direct current acquisition module is connected with the output end of the power conversion system and is used for acquiring a direct current signal at the output end of the power conversion system;
the battery communication module is in communication connection with the energy storage battery and is used for acquiring charge and discharge signals of the energy storage battery;
and the data processing module is respectively connected with the alternating current acquisition module, the direct current acquisition module and the battery communication module, and is used for carrying out data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charging and discharging signal, carrying out list output on the analyzed data and carrying out alarm on abnormity of the energy storage battery.
3. An energy storage operation and detection method is applied to a battery energy storage system, wherein the battery energy storage system comprises an isolation transformer, a power conversion system and an energy storage battery which are sequentially connected, and the method is characterized by comprising the following steps of:
acquiring an alternating current signal at the input end of the isolation transformer, a direct current signal at the output end of the power conversion system and a charge and discharge signal of the energy storage battery;
performing data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charging and discharging signal to obtain analysis data;
and outputting the analysis data in a list, and alarming the abnormity of the energy storage battery.
4. The energy storage operation and inspection method according to claim 3, wherein the step of performing data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charge and discharge signal to obtain analysis data comprises the steps of:
determining an output power curve of the power conversion system according to the direct current signal;
determining a first time and a second time in the output power curve, wherein the first time is used for representing the time when the power of the output power curve starts to change, and the second time is used for representing the time when the power change in the output power curve tends to be stable;
determining a first adjustment response time according to the first time and the second time;
and determining second regulation response time according to the first regulation response time based on national standard test specifications.
5. The energy storage operation and inspection method according to claim 4, wherein the determining a second adjustment response time according to the first adjustment response time based on national standard test specifications comprises the steps of:
determining a first power value corresponding to the first time in the output power curve;
determining a second power value of the output power curve in a stable state;
determining a national standard test range according to the first power value and the second power value, wherein the national standard test range has a first boundary value and a second boundary value which have equal absolute values, and the signs of the first boundary value and the second boundary value are opposite;
intercepting a data segment in the national standard test range, wherein the data segment has a third boundary value and a fourth boundary value;
determining a projection relation coefficient according to the first power value, the second power value, the first boundary value and the second boundary value;
and determining the second adjustment response time according to the first time, the second time and the projection relation coefficient.
6. The energy storage operation detection method according to claim 5, wherein the first adjustment response time is equal to a difference between the second time and the first time, and the second adjustment response time is a product of the first adjustment response time and the projection relationship coefficient.
7. The energy storage operation and inspection method according to claim 3, wherein the step of performing data analysis on the energy storage battery according to the alternating current signal, the direct current signal and the charge and discharge signal to obtain analysis data comprises the steps of:
determining a first charging time sequence and a first discharging time sequence according to the charging and discharging signals;
carrying out binarization processing on the first charging time sequence and the first discharging time sequence to obtain a second charging time sequence and a second discharging time sequence;
accumulating a plurality of second charging time sequences to obtain a third charging time sequence;
accumulating a plurality of second discharge time sequences to obtain a third discharge time sequence;
and determining the consistency of the energy storage battery according to the third charging time sequence and the third discharging time sequence.
8. The energy storage operation and inspection method according to claim 7, wherein the binarization processing is performed on the first charging time series and the first discharging time series to obtain a second charging time series and a second discharging time series, and the method comprises the following steps:
sequencing the first charging time sequence to obtain a first charging time subsequence;
setting data in the first charging time subsequence within a preset first proportion range to be one, and setting the rest data to be zero to obtain a second charging time subsequence;
according to the second charging time subsequence, setting one or zero to the corresponding data in the first charging time sequence to obtain a second charging time sequence;
sequencing the first discharge time sequence to obtain a first discharge time subsequence;
setting data in a preset second proportion range in the first discharging time subsequence to be one and setting other data to be zero to obtain a second discharging time subsequence;
and setting the corresponding data in the first discharge time sequence to be one or zero according to the second discharge time subsequence to obtain the second discharge time sequence.
9. The energy storage operation detection method according to claim 7 or 8, wherein the determining the consistency of the energy storage batteries according to the third charging time series and the third discharging time series comprises the steps of:
determining that the consistency of the energy storage battery is abnormal under the condition that the data in the third charging time sequence is larger than a preset first threshold;
or determining that the consistency of the energy storage battery is abnormal under the condition that the data in the third discharging time sequence is larger than a preset second threshold.
10. A computer storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the energy storage operation method according to any one of claims 4 to 9.
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