CN115986797A - New energy station electrochemical energy storage system grid-connection performance detection method, device and system based on multipoint synchronous test - Google Patents
New energy station electrochemical energy storage system grid-connection performance detection method, device and system based on multipoint synchronous test Download PDFInfo
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Abstract
The invention discloses a method, a device and a system for detecting grid-connected performance of an electrochemical energy storage system of a new energy station based on multipoint synchronous testing, belongs to the field of new energy stations, and is used for solving the problem that grid-connected operation is not performed blindly to analyze the adaptability of the energy storage system and a power distribution network, so that grid-connected success is reduced.
Description
Technical Field
The invention belongs to the field of new energy stations, relates to a technology for detecting the grid-connected performance of an electrochemical energy storage system, and particularly relates to a method, a device and a system for detecting the grid-connected performance of the electrochemical energy storage system of a new energy station based on multipoint synchronous testing.
Background
The new energy station refers to all equipment below a grid-connected point of a wind power plant or a photovoltaic power station which is connected into a power system in a centralized mode, and the equipment comprises a transformer, a bus, a circuit, a converter, an energy storage unit, a wind turbine generator, a photovoltaic power generation system, reactive power regulation equipment, auxiliary equipment and the like.
When the lower energy storage system is connected to a power grid, the adaptability of the energy storage system and the power distribution network is not analyzed, so that the success of grid connection of the energy storage system is reduced by blindly carrying out grid connection operation;
therefore, a method, a device and a system for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on multipoint synchronous testing are provided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method, a device and a system for detecting the grid-connected performance of an electrochemical energy storage system of a new energy station based on multipoint synchronous testing.
The technical problem to be solved by the invention is as follows:
how to analyze the performance of the electrochemical energy storage system so as to adapt to a power grid and how to realize intelligent grid connection of the electrochemical energy storage system.
The purpose of the invention can be realized by the following technical scheme:
a new energy station electrochemical energy storage system grid-connected performance detection device based on multipoint synchronous testing comprises a detection device and a processor arranged in the detection device, wherein the processor is connected with a server, a data acquisition module and an execution module, the server is connected with an energy storage judgment module, an electric energy quality analysis module, a management terminal, an intelligent grid-connected module, a storage module and a simulation analysis module, the management terminal is used for inputting electric energy data of the electrochemical energy storage system and sending the electric energy data to the server, and the server sends the electric energy data to the electric energy quality analysis module; the electric energy quality analysis module is used for analyzing the energy storage quality of the electrochemical energy storage system to obtain an electric energy quality value of the electrochemical energy storage system and feeding the electric energy quality value back to the server, the server sends the electric energy quality value to the energy storage judgment module, the energy storage judgment module is used for judging the energy storage quality of the electrochemical energy storage system to obtain an energy storage quality grade of the electrochemical energy storage system and feeding the energy storage quality grade back to the server, and the server sends the energy storage quality grade to the intelligent grid-connected module;
the data acquisition module is used for acquiring real-time operation data after the electrochemical energy storage system is connected to the grid, and the processor and the server send the real-time operation data to the simulation analysis module; the management terminal is used for inputting historical access data of access points used during grid connection of the electrochemical energy storage system and standard operation data of the electrochemical energy storage system after grid connection and sending the historical access data and the standard operation data to the storage module for storage; the storage module sends the standard operation data to the simulation analysis module, and the storage module sends the historical access data to the intelligent grid-connected module;
the simulation analysis module is used for performing simulation analysis on the working state of the electrochemical energy storage system after grid connection, generating a detection normal signal or obtaining a detection deviation value of the electrochemical energy storage system and feeding the detection normal signal or the detection deviation value back to the server through the simulation analysis, and the server sends the detection normal signal or the detection deviation value to the intelligent grid connection module; the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system into a power distribution network, obtaining an access permission instruction, an access selection instruction or an access rejection instruction and sending the access permission instruction, the access selection instruction or the access rejection instruction to the execution module through the server and the processor, and the execution module carries out grid-connected operation on the electrochemical energy storage system according to the instruction.
Further, the electric energy data includes the total historical access times, the historical access success times, the frequency abnormality times, the response duration of each frequency abnormality, the voltage abnormality times and the response duration of each voltage abnormality of the electrochemical energy storage system.
Further, the analysis process of the power quality analysis module is specifically as follows:
acquiring historical access times and historical access success times of the electrochemical energy storage system, and comparing the historical access success times with the historical access total times to obtain the historical access success rate of the electrochemical energy storage system;
then acquiring the frequency abnormal times of the electrochemical energy storage system and the response time length of each time of frequency abnormality, recording the times that the response time length is not in the standard response time length interval and recording the times as the frequency response abnormal times, and comparing the frequency response abnormal times with the frequency abnormal times to obtain the frequency response abnormal rate of the electrochemical energy storage system;
similarly, the voltage abnormity times of the electrochemical energy storage system and the response time length of each time of voltage abnormity are obtained, the times that the response time length is not in the standard response time length interval are recorded and recorded as the voltage response abnormity times, and the voltage response abnormity rate of the electrochemical energy storage system is obtained by comparing the voltage response abnormity times with the voltage abnormity times;
and calculating the electric energy quality value of the electrochemical energy storage system.
Further, the energy storage determination module specifically performs the following determination process:
acquiring the electric energy quality value of the electrochemical energy storage system;
the power quality value is compared with a power quality threshold, and judging the energy storage quality grade of the electrochemical energy storage system to be a third energy storage quality grade, a second energy storage quality grade or a first energy storage quality grade.
Further, the grade of the third energy storage quality grade is lower than that of the second energy storage quality grade, and the grade of the second energy storage quality grade is lower than that of the first energy storage quality grade.
Further, historical access data are preset detection deviation intervals of access points used by the electrochemical energy storage system and power grid quality levels of power grids connected with the access points;
the standard operation data are voltage harmonic standard distortion rate, voltage standard flicker times, voltage standard deviation value and direct current standard component when the electrochemical energy storage system is connected to the grid;
the real-time operation data comprises voltage harmonic real-time distortion rate, voltage real-time flicker frequency, voltage real-time deviation value and direct current real-time component after the electrochemical energy storage system is connected to the grid;
the power grid quality grades comprise a first power grid quality grade, a second power grid quality grade and a third power grid quality grade, different power grid quality grades correspond to different energy storage quality grades, the first power grid quality grade corresponds to the first energy storage quality grade, the second power grid quality grade corresponds to the second energy storage quality grade, and the third power grid quality grade corresponds to the third energy storage quality grade.
Further, the simulation analysis process of the simulation analysis module is specifically as follows:
acquiring standard operation data of the electrochemical energy storage system during grid connection to obtain a voltage harmonic standard distortion rate, a voltage standard flicker frequency, a voltage standard deviation value and a direct current standard component of the electrochemical energy storage system after grid connection;
then acquiring a voltage harmonic real-time distortion rate, a voltage real-time flicker frequency, a voltage real-time deviation value and a direct current real-time component after the electrochemical energy storage system is connected to the grid;
if the voltage harmonic real-time distortion rate does not exceed the voltage harmonic standard distortion rate, the voltage real-time flicker rate does not exceed the voltage standard flicker rate, the voltage real-time deviation value does not exceed the voltage standard deviation value and the direct current real-time component does not exceed the direct current real-time component, generating a detection normal signal, otherwise, respectively calculating a difference value of the voltage harmonic real-time distortion rate and the voltage harmonic standard distortion rate, a difference value of the voltage real-time flicker rate and the voltage standard flicker rate, a difference value of the voltage real-time deviation value and the voltage standard deviation value and a difference value of the direct current real-time component and the direct current standard component to obtain a voltage harmonic distortion rate difference value, a voltage flicker rate difference value, a voltage deviation difference value and a direct current component difference value of the electrochemical energy storage system;
and calculating the detection deviation value of the electrochemical energy storage system.
Further, the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system to a power distribution network, and the working process specifically comprises the following steps:
acquiring an access point used by the grid connection of the electrochemical energy storage system, and then acquiring a preset detection deviation interval of the access point used by the electrochemical energy storage system and the quality grade of a power grid of the power grid connected with the access point;
finally, acquiring a normal detection signal of the electrochemical energy storage system or a detection deviation value of the electrochemical energy storage system and the energy storage quality grade of the electrochemical energy storage system;
if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point, and the electrochemical energy storage system generates a detection normal signal through simulation analysis or the detection deviation value of the electrochemical energy storage system is in a preset detection deviation interval, generating an access permission instruction;
if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point, but the detection deviation value of the electrochemical energy storage system is not in a preset detection deviation interval, generating a selective access instruction;
if the energy storage quality grade of the chemical energy storage system does not correspond to the power grid quality grade of the access point, but the electrochemical energy storage system generates a detection normal signal through simulation analysis or the detection deviation value of the electrochemical energy storage system is in a preset detection deviation interval, generating an access selection instruction;
and if the energy storage quality grade of the chemical energy storage system does not correspond to the power grid quality grade of the access point, and the detection deviation value of the electrochemical energy storage system is not in a preset detection deviation interval, generating an access refusing instruction.
A new energy station electrochemistry energy storage system grid-connected performance detection system based on multi-point synchronous test comprises:
the management terminal is used for inputting electric energy data of the electrochemical energy storage system;
the electric energy quality analysis module is used for analyzing the energy storage quality of the electrochemical energy storage system;
the energy storage judging module is used for judging the energy storage quality of the electrochemical energy storage system;
the data acquisition module is used for acquiring real-time operation data after the electrochemical energy storage system is connected to the grid;
the management terminal is also used for inputting historical access data of an access point used during grid connection of the electrochemical energy storage system and standard operation data of the electrochemical energy storage system after grid connection;
the simulation analysis module is used for performing simulation analysis on the working state of the electrochemical energy storage system after grid connection;
the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system to a power distribution network;
and the execution module is used for carrying out grid-connected operation on the electrochemical energy storage system according to the instruction.
A new energy station electrochemical energy storage system grid-connected performance detection method based on multipoint synchronous testing specifically comprises the following steps:
step S101, inputting electric energy data of an electrochemical energy storage system by a management terminal, analyzing the energy storage quality of the electrochemical energy storage system through an electric energy quality analysis module, obtaining the electric energy quality value of the electrochemical energy storage system, and sending the electric energy quality value to an energy storage judgment module;
step S102, an energy storage judging module judges the energy storage quality of the electrochemical energy storage system to obtain the energy storage quality grade of the electrochemical energy storage system and sends the energy storage quality grade to an intelligent grid-connected module;
step S103, a data acquisition module acquires real-time operation data of the electrochemical energy storage system after grid connection, and meanwhile, a management terminal inputs historical access data of an access point used when the electrochemical energy storage system is connected to the grid and standard operation data of the electrochemical energy storage system after grid connection;
step S104, the simulation analysis module carries out simulation analysis on the working state of the electrochemical energy storage system after grid connection, and a detection normal signal generated by the simulation analysis or a detection deviation value of the electrochemical energy storage system is sent to the intelligent grid connection module;
and S105, intelligently accessing the electrochemical energy storage system to a power distribution network by the intelligent grid-connected module to obtain an access permission instruction, an access selection instruction or an access rejection instruction.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the steps of firstly analyzing the energy storage quality of an electrochemical energy storage system through an energy quality analysis module, obtaining the energy quality value of the electrochemical energy storage system, sending the energy quality value to an energy storage judgment module, judging the energy storage quality of the electrochemical energy storage system through the energy storage judgment module, obtaining the energy storage quality grade of the electrochemical energy storage system, sending the energy storage quality grade to an intelligent grid-connected module, simultaneously carrying out analog analysis on the working state of the electrochemical energy storage system after grid connection through an analog analysis module, sending a detection normal signal generated by analog analysis or a detection deviation value of the electrochemical energy storage system to the intelligent grid-connected module, and finally utilizing the intelligent grid-connected module to intelligently connect the electrochemical energy storage system to a power distribution network to generate an access permission instruction, an access selection instruction or an access refusal instruction so as to realize the intelligent grid connection of the electrochemical energy storage system according to the instruction.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an overall system block diagram of the present invention;
fig. 3 is a flow chart of the operation of the present invention.
Detailed Description
The technical solutions of the present invention will be described below clearly and completely in conjunction with the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, a new energy station electrochemical energy storage system grid-connected performance detection device based on a multipoint synchronous test is proposed, an electrochemical energy storage system above 200kW is connected to a power distribution network with a voltage level of 10kV (6 kV) or above, and an energy storage system below 200kW is connected to a power distribution network with a voltage level of 220V/380V, in this embodiment, the electrochemical energy storage system is above 200 kW;
the method comprises the following steps: the device comprises an electrochemical energy storage system and a detection device connected with the electrochemical energy storage system, wherein a processor is arranged in the detection device, the processor is connected with a server, a data acquisition module and an execution module, and the server is connected with an energy storage judgment module, an electric energy quality analysis module, a management terminal, an intelligent grid-connected module, a storage module and a simulation analysis module;
specifically, the management terminal is used for a manager to register and log in a server after inputting personal information, and sending the personal information to the server, wherein the personal information comprises names, mobile phone numbers and the like of the manager;
in specific implementation, the management terminal is used for inputting electric energy data of the electrochemical energy storage system and sending the electric energy data to the server, and the server sends the electric energy data to the electric energy quality analysis module;
specifically, the electric energy data includes the total historical access times, the historical access success times, the frequency abnormality times, the response duration of each frequency abnormality, the voltage abnormality times, the response duration of each voltage abnormality and the like of the electrochemical energy storage system, wherein the frequency abnormality times and the voltage abnormality times are corresponding data which can be obtained only after the electrochemical energy storage system is historically accessed to a power grid;
the electric energy quality analysis module is used for analyzing the energy storage quality of the electrochemical energy storage system, and the analysis process is as follows:
acquiring historical access times and historical access success times of the electrochemical energy storage system, and comparing the historical access success times with the historical access total times to obtain a historical access success rate JCL of the electrochemical energy storage system;
then acquiring the frequency abnormal times of the electrochemical energy storage system and the response time length of each time of frequency abnormality, recording the times that the response time length is not in the standard response time length interval and recording as the frequency response abnormal times, and comparing the frequency response abnormal times with the frequency abnormal times to obtain the frequency response abnormal rate PLL of the electrochemical energy storage system;
wherein, the normal frequency range (Hz) of the electrochemical energy storage system is [49.5, 50.2], when the frequency range (Hz) of the electrochemical energy storage system is [48.0, 49.5 ], the electrochemical energy storage system in the charging state should be converted into the discharging state within 0.2S, and should be separated from the power grid within 0.2S for the condition that the electrochemical energy storage system does not have the discharging condition or other special conditions, when the frequency range (Hz) of the electrochemical energy storage system is (50.2, 50.5], the electrochemical energy storage system in the discharging state should be converted into the charging state within 0.2S, and should be separated from the power grid within 0.2S for the condition that the electrochemical energy storage system does not have the charging condition or other special conditions, therefore [0S,0.2S ] can be regarded as the standard response duration interval when the frequency of the electrochemical energy storage system is abnormal;
similarly, acquiring the voltage abnormal times of the electrochemical energy storage system and the response time length of each time of voltage abnormality, recording the times that the response time length is not in the standard response time length interval and recording as the voltage response abnormal times, and comparing the voltage response abnormal times with the voltage abnormal times to obtain the voltage response abnormal rate DYL of the electrochemical energy storage system; wherein the normal voltage range (Hz) of the electrochemical energy storage system is [85% U N ，110%U N ) When the voltage U of the electrochemical energy storage system is: 50% of U N ≤U＜85%U N Or 110% of U N ≤U＜120%U N The maximum opening time does not exceed 2.0S, U < 50% N Or 120% of U N If the voltage is less than or equal to U, the maximum switching-off time is not more than 0.2S, and therefore the switching-off time is a standard response time interval when the voltage of the electrochemical energy storage system is abnormal;
calculating the electric energy quality value DZ of the electrochemical energy storage system by a formula DZ = JCL/(DYL + DYL); in the above formula, the voltage response abnormal rate and the frequency response abnormal rate are in inverse proportion relation with the electric energy quality value, and the access success rate is in direct proportion relation with the electric energy quality value;
the electric energy quality analysis module feeds back the electric energy quality value DZ of the electrochemical energy storage system to the server, the server sends the electric energy quality value DZ of the electrochemical energy storage system to the energy storage judging module, the energy storage judging module is used for judging the energy storage quality of the electrochemical energy storage system, and the judging process is as follows:
obtaining the electric energy quality value DZ of the electrochemical energy storage system obtained through calculation;
if DZ is less than X1, the energy storage quality grade of the electrochemical energy storage system is a third energy storage quality grade;
if the DZ is more than or equal to X1 and less than X2, the energy storage quality grade of the electrochemical energy storage system is a second energy storage quality grade;
if X2 is less than or equal to DZ, the energy storage quality grade of the electrochemical energy storage system is a first energy storage quality grade; wherein, X1 and X2 are both power quality thresholds of fixed values, and X1 is less than X2, in specific implementation, the value of X1 may be 1.23, and the value of X2 may be 2.54, and the above values of X1 and X2 are only exemplary illustrations, which is convenient for understanding the size relationship between X1 and X2;
the grade of the third energy storage quality grade is lower than that of the second energy storage quality grade, and the grade of the second energy storage quality grade is lower than that of the first energy storage quality grade;
the energy storage judging module feeds back the energy storage quality grade of the electrochemical energy storage system to the server, and the server sends the energy storage quality grade of the electrochemical energy storage system to the intelligent grid-connected module;
in this embodiment, the data acquisition module is configured to acquire real-time operation data after the electrochemical energy storage system is connected to the grid, and send the real-time operation data to the processor, where the processor sends the real-time operation data to the server, and the server sends the real-time operation data to the simulation analysis module;
in specific implementation, the data acquisition module includes, but is not limited to, a harmonic tester, a counter, a voltage and current detector, etc.;
the management terminal is used for inputting historical access data of access points used when the electrochemical energy storage system is connected to the grid and standard operation data after the electrochemical energy storage system is connected to the grid, and sending the historical access data and the standard operation data to the storage module for storage;
specifically, the historical access data is a preset detection deviation interval of an access point used by the electrochemical energy storage system and the power grid quality grade of a power grid connected with the access point; the standard operation data are voltage harmonic standard distortion rate, voltage standard flicker times, voltage standard deviation value and direct current standard component when the electrochemical energy storage system is connected to the grid; the real-time operation data comprises voltage harmonic real-time distortion rate, voltage real-time flicker frequency, voltage real-time deviation value, direct current real-time component and the like after the electrochemical energy storage system is connected to the grid;
it is to be further explained that the power grid quality classes include a first power grid quality class, a second power grid quality class and a third power grid quality class, the different power grid quality classes correspond to different energy storage quality classes, the first power grid quality class corresponds to a first energy storage quality class, the second power grid quality class corresponds to a second energy storage quality class, and the third power grid quality class corresponds to a third energy storage quality class;
the storage module is respectively connected with the analog analysis module and the intelligent grid-connected module, the storage module sends standard operation data to the analog analysis module, and the storage module sends historical access data to the intelligent grid-connected module;
the simulation analysis module is used for connecting the electrochemical energy storage system with a virtual power distribution network, analyzing the running state of the electrochemical energy storage system after the electrochemical energy storage system is connected with the virtual power distribution network, wherein the running state is real-time running data, the virtual power distribution network can be built and constructed in advance by a manager and is used for test running before the electrochemical energy storage system is formally connected to the power grid, and the virtual power distribution network is similar to a virtual power plant;
the simulation analysis module is used for performing simulation analysis on the working state of the electrochemical energy storage system after grid connection, and the simulation analysis process specifically comprises the following steps:
obtaining standard operation data of the electrochemical energy storage system during grid connection to obtain a voltage harmonic standard distortion rate, a voltage standard flicker frequency, a voltage standard deviation value and a direct current standard component of the electrochemical energy storage system after grid connection;
then acquiring a voltage harmonic real-time distortion rate, a voltage real-time flicker frequency, a voltage real-time deviation value and a direct current real-time component of the electrochemical energy storage system after grid connection;
if the voltage harmonic real-time distortion rate does not exceed the voltage harmonic standard distortion rate, the voltage real-time flicker rate does not exceed the voltage standard flicker rate, the voltage real-time deviation value does not exceed the voltage standard deviation value and the direct current real-time component does not exceed the direct current real-time component, generating a detection normal signal, otherwise, respectively calculating a difference value of the voltage harmonic real-time distortion rate and the voltage harmonic standard distortion rate, a difference value of the voltage real-time flicker rate and the voltage standard flicker rate, a difference value of the voltage real-time deviation value and the voltage standard deviation value and a difference value of the direct current real-time component and the direct current standard component to obtain a voltage harmonic distortion rate difference value, a QC voltage flicker rate difference value, a voltage deviation difference value YC and a direct current component difference value LC of the electrochemical energy storage system;
calculating a detection deviation value JP of the electrochemical energy storage system through a formula JP = QC × a1+ SC × a2+ YC × a3+ LC × a 4; in the formula, a1, a2, a3 and a4 are all weight coefficients with fixed values, and the values of a1, a2, a3 and a4 are all greater than zero, in specific implementation, the value of a1 may be 0.1, the value of a2 may be 0.53, the value of a3 may be 0.2, and the value of a4 may be 0.17, or the value of a1 may be 0.2, the value of a2 may be 0.42, the value of a3 may be 0.3, and the value of a4 may be 0.08, as long as the value of the weight coefficient does not affect the positive-negative ratio relationship between the parameter and the result value;
the simulation analysis module feeds back a detection normal signal generated by simulation analysis or a detection deviation value of the electrochemical energy storage system to the server, and the server sends the detection normal signal generated by simulation analysis or the detection deviation value of the electrochemical energy storage system to the intelligent grid-connected module;
the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system to a power distribution network, and the working process is as follows:
acquiring an access point used for grid connection of an electrochemical energy storage system, and then acquiring a preset detection deviation interval of the access point used by the electrochemical energy storage system and the quality grade of a power grid of the power grid connected with the access point;
finally, acquiring a normal detection signal of the electrochemical energy storage system or a detection deviation value of the electrochemical energy storage system and the energy storage quality grade of the electrochemical energy storage system;
if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point, and the electrochemical energy storage system generates a detection normal signal through simulation analysis or the detection deviation value of the electrochemical energy storage system is in a preset detection deviation interval, generating an access permission instruction;
if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point, but the detection deviation value of the electrochemical energy storage system is not in a preset detection deviation interval, generating a selective access instruction;
if the energy storage quality grade of the chemical energy storage system does not correspond to the power grid quality grade of the access point, but the electrochemical energy storage system generates a detection normal signal through simulation analysis or the detection deviation value of the electrochemical energy storage system is in a preset detection deviation interval, generating an access selection instruction;
if the energy storage quality grade of the chemical energy storage system does not correspond to the power grid quality grade of the access point, and the detection deviation value of the electrochemical energy storage system is not in a preset detection deviation interval, generating an access refusing instruction;
the intelligent grid-connected module feeds back an access permission instruction, an access selection instruction or an access rejection instruction to the server, the server sends the access permission instruction, the access selection instruction or the access rejection instruction to the processor, the processor sends the access permission instruction, the access selection instruction or the access rejection instruction to the execution module, the execution module carries out grid-connected operation on the electrochemical energy storage system according to the access permission instruction, the access selection instruction or the access rejection instruction, and the grid-connected operation comprises that the electrochemical energy storage system is connected to the grid through an access point, the access point for connecting the electrochemical energy storage system to the grid is reselected, and the like;
the execution module is specifically a driving device on the electrochemical energy storage system, and can connect the electrochemical energy storage system with a power grid through an access point;
the above formulas are all calculated by taking the numerical value of the dimension removed, the weight coefficient and the scale coefficient are specific numerical values obtained by quantizing each parameter, and the scale coefficient and the weight coefficient can be calculated as long as the proportional relationship between the parameter and the quantized numerical value is not affected.
Example two
Referring to fig. 2, a system for detecting grid-connected performance of an electrochemical energy storage system of a new energy station based on a multipoint synchronous test is provided, and includes a processor, a data acquisition module, an execution module, a server, an energy storage determination module, an electric energy quality analysis module, a management terminal, an intelligent grid-connected module, a storage module, and a simulation analysis module;
the management terminal is used for inputting electric energy data of the electrochemical energy storage system and sending the electric energy data to the server, and the server sends the electric energy data to the electric energy quality analysis module;
the electric energy quality analysis module is used for analyzing the energy storage quality of the electrochemical energy storage system to obtain the electric energy quality value of the electrochemical energy storage system and sending the electric energy quality value to the energy storage judgment module;
the energy storage judging module is used for judging the energy storage quality of the electrochemical energy storage system, obtaining the energy storage quality grade of the electrochemical energy storage system and sending the energy storage quality grade to the intelligent grid-connected module;
the data acquisition module is used for acquiring real-time operation data after the electrochemical energy storage system is connected to the grid and sending the real-time operation data to the simulation analysis module through the processor and the server;
the management terminal is also used for inputting historical access data of access points used during grid connection of the electrochemical energy storage system and standard operation data of the electrochemical energy storage system after grid connection;
the simulation analysis module is used for performing simulation analysis on the working state of the electrochemical energy storage system after grid connection, and a detection normal signal generated by the simulation analysis or a detection deviation value of the electrochemical energy storage system is sent to the intelligent grid connection module;
the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system to a power distribution network, and working to obtain an access permission instruction, an access selection instruction or an access rejection instruction;
the execution module correspondingly operates the electrochemical energy storage system according to the access allowing command, the access selecting command or the access refusing command.
EXAMPLE III
Referring to fig. 3, a method for detecting grid-connected performance of an electrochemical energy storage system of a new energy station based on a multipoint synchronous test is provided, and the method includes:
step S101, a management terminal inputs electric energy data of an electrochemical energy storage system and sends the electric energy data to a server, the server sends the electric energy data to an electric energy quality analysis module, the electric energy quality analysis module analyzes the energy storage quality of the electrochemical energy storage system, historical access times and historical access success times of the electrochemical energy storage system are obtained, the historical access success rate of the electrochemical energy storage system is obtained by comparing the historical access success times with the historical access total times, frequency abnormity times of the electrochemical energy storage system and response duration of each time when the frequency is abnormal are obtained, the times that the response duration is not in a standard response duration interval are recorded and recorded as frequency response abnormity times, the frequency response abnormity times are obtained by comparing the frequency response abnormity times with the frequency abnormity times, the frequency response abnormity rates of the electrochemical energy storage system are obtained, similarly, the voltage abnormity times of the electrochemical energy storage system and the response duration of each time when the voltage is abnormal are obtained, the times that the response duration is not in the standard response duration interval are recorded and recorded as voltage response abnormity times, the voltage response abnormity times are obtained by comparing the voltage response abnormity times, the voltage response abnormity times are obtained, the electric energy quality value of the electrochemical energy storage system is calculated, the electric energy quality value of the electric energy quality analysis module feeds the electric energy storage system back to the server, and the electric energy storage system quality value is sent to the server;
step S102, judging the energy storage quality of the electrochemical energy storage system through an energy storage judging module to obtain an electric energy quality value of the electrochemical energy storage system, comparing the electric energy quality value with an electric energy quality threshold, judging that the energy storage quality grade of the electrochemical energy storage system is a third energy storage quality grade, a second energy storage quality grade or a first energy storage quality grade, feeding the energy storage quality grade of the electrochemical energy storage system back to a server through the energy storage judging module, and sending the energy storage quality grade of the electrochemical energy storage system to an intelligent grid-connected module through the server;
step S103, acquiring real-time operation data after the electrochemical energy storage system is connected to the grid by using a data acquisition module, sending the real-time operation data to a processor, sending the real-time operation data to a server by using the processor, sending the real-time operation data to a simulation analysis module by using the server, inputting historical access data of an access point used when the electrochemical energy storage system is connected to the grid and standard operation data after the electrochemical energy storage system is connected to the grid by using a management terminal, and sending the historical access data and the standard operation data to a storage module for storage;
step S104, performing simulation analysis on the working state of the electrochemical energy storage system after grid connection through a simulation analysis module, acquiring standard operation data of the electrochemical energy storage system during grid connection, acquiring voltage harmonic standard distortion rate, voltage standard flicker rate, voltage standard deviation value and direct current standard component of the electrochemical energy storage system after grid connection, acquiring voltage harmonic real-time distortion rate, voltage real-time flicker rate, voltage real-time deviation value and direct current real-time component of the electrochemical energy storage system after grid connection, if the voltage harmonic real-time distortion rate does not exceed the voltage harmonic standard distortion rate, the voltage real-time flicker rate does not exceed the voltage standard flicker rate, the voltage real-time deviation value does not exceed the voltage standard deviation value and the direct current real-time component does not exceed the direct current real-time component, generating a detection normal signal, otherwise, respectively calculating a difference value of the voltage harmonic real-time distortion rate and the voltage harmonic standard distortion rate, a difference value of the voltage real-time flicker rate and the voltage standard flicker rate, a difference value of the voltage real-time deviation value and the voltage standard deviation value, a difference value of the voltage real-time component and the direct current standard component, and calculating a simulation analysis module to generate an electrochemical detection normal detection signal or a detection normal detection server, and generating the detection signal of the electrochemical energy storage system simulation analysis module and the detection normal detection signal of the detection and the detection normal detection deviation value of the detection normal detection system;
step S105, the intelligent grid-connected module intelligently accesses the electrochemical energy storage system to a power distribution network, acquires an access point used for grid connection of the electrochemical energy storage system, then acquires a preset detection deviation interval of the access point used by the electrochemical energy storage system and a power grid quality grade of a power grid connected with the access point, finally acquires a detection normal signal of the electrochemical energy storage system or a detection deviation value of the electrochemical energy storage system and an energy storage quality grade of the electrochemical energy storage system, generates an access permission instruction if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point and the detection deviation value of the electrochemical energy storage system is in the preset detection deviation interval, generates a selection access instruction if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point but the detection normal signal of the electrochemical energy storage system is not in the preset detection deviation interval, generates a selection access instruction if the energy storage quality grade of the chemical energy storage system does not correspond to the power grid quality grade of the access point but the electrochemical energy storage system is in the preset detection deviation interval, generates a selection access permission instruction or refuses the detection instruction, and sends the selection instruction to the electrochemical energy storage system access permission access server, and refuses the detection instruction or refuses the detection instruction to the access permission server, and the selection instruction, the execution module correspondingly operates the electrochemical energy storage system according to the access allowing command, the access selecting command or the access refusing command.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms 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 understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test comprises a detection device and a processor arranged in the detection device, and is characterized in that the processor is connected with a server, a data acquisition module and an execution module, the server is connected with an energy storage judgment module, an electric energy quality analysis module, a management terminal, an intelligent grid-connected module, a storage module and a simulation analysis module, the management terminal is used for inputting electric energy data of the electrochemical energy storage system and sending the electric energy data to the server, and the server sends the electric energy data to the electric energy quality analysis module; the electric energy quality analysis module is used for analyzing the energy storage quality of the electrochemical energy storage system to obtain the electric energy quality value of the electrochemical energy storage system and feeding the electric energy quality value back to the server, the server sends the electric energy quality value to the energy storage judgment module, the energy storage judgment module is used for judging the energy storage quality of the electrochemical energy storage system to obtain the energy storage quality grade of the electrochemical energy storage system and feeding the energy storage quality grade back to the server, and the server sends the energy storage quality grade to the intelligent grid-connected module;
the data acquisition module is used for acquiring real-time operation data after the electrochemical energy storage system is connected to the grid, and the processor and the server send the real-time operation data to the simulation analysis module; the management terminal is used for inputting historical access data of access points used when the electrochemical energy storage system is connected to the grid and standard operation data after the electrochemical energy storage system is connected to the grid and sending the historical access data and the standard operation data to the storage module for storage; the storage module sends the standard operation data to the simulation analysis module, and the storage module sends the historical access data to the intelligent grid-connected module;
the simulation analysis module is used for performing simulation analysis on the working state of the electrochemical energy storage system after grid connection, generating a detection normal signal or obtaining a detection deviation value of the electrochemical energy storage system and feeding the detection normal signal or the detection deviation value back to the server through the simulation analysis, and the server sends the detection normal signal or the detection deviation value to the intelligent grid connection module; the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system into a power distribution network to obtain an access permission instruction, an access selection instruction or an access refusal instruction, and sending the access permission instruction, the access selection instruction or the access refusal instruction to the execution module through the server and the processor, and the execution module carries out grid-connected operation on the electrochemical energy storage system according to the instruction.
2. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test as claimed in claim 1, wherein the electric energy data includes the total historical access times, the historical access success times, the frequency abnormality times of the electrochemical energy storage system, the response duration of each frequency abnormality, the voltage abnormality times and the response duration of each voltage abnormality.
3. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test as claimed in claim 2, wherein the analysis process of the electric energy quality analysis module is as follows:
acquiring historical access times and historical access success times of the electrochemical energy storage system, and comparing the historical access success times with the historical access total times to obtain the historical access success rate of the electrochemical energy storage system;
then acquiring the frequency abnormal times of the electrochemical energy storage system and the response time length of each time of frequency abnormality, recording the times that the response time length is not in the standard response time length interval and recording the times as the frequency response abnormal times, and comparing the frequency response abnormal times with the frequency abnormal times to obtain the frequency response abnormal rate of the electrochemical energy storage system;
similarly, the voltage abnormity times of the electrochemical energy storage system and the response time length of each time of voltage abnormity are obtained, the times that the response time length is not in the standard response time length interval are recorded and recorded as the voltage response abnormity times, and the voltage response abnormity rate of the electrochemical energy storage system is obtained by comparing the voltage response abnormity times with the voltage abnormity times;
and calculating the electric energy quality value of the electrochemical energy storage system.
4. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test as claimed in claim 3, wherein the determination process of the energy storage determination module is as follows:
acquiring the electric energy quality value of the electrochemical energy storage system;
and comparing the electric energy quality value with the electric energy quality threshold, and judging that the energy storage quality grade of the electrochemical energy storage system is a third energy storage quality grade, a second energy storage quality grade or a first energy storage quality grade.
5. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test as claimed in claim 4, wherein the third energy storage quality level is lower than the second energy storage quality level, and the second energy storage quality level is lower than the first energy storage quality level.
6. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test as claimed in claim 1, wherein the historical access data is a preset detection deviation interval of an access point used by the electrochemical energy storage system and a power grid quality grade of a power grid connected with the access point;
the standard operation data are voltage harmonic standard distortion rate, voltage standard flicker times, voltage standard deviation value and direct current standard component when the electrochemical energy storage system is connected to the grid;
the real-time operation data comprises voltage harmonic real-time distortion rate, voltage real-time flicker frequency, voltage real-time deviation value and direct current real-time component after the electrochemical energy storage system is connected to the grid;
the power grid quality grades comprise a first power grid quality grade, a second power grid quality grade and a third power grid quality grade, different power grid quality grades correspond to different energy storage quality grades, the first power grid quality grade corresponds to the first energy storage quality grade, the second power grid quality grade corresponds to the second energy storage quality grade, and the third power grid quality grade corresponds to the third energy storage quality grade.
7. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test as claimed in claim 6, wherein the simulation analysis process of the simulation analysis module is as follows:
acquiring standard operation data of the electrochemical energy storage system during grid connection to obtain a voltage harmonic standard distortion rate, a voltage standard flicker frequency, a voltage standard deviation value and a direct current standard component of the electrochemical energy storage system after grid connection;
then acquiring a voltage harmonic real-time distortion rate, a voltage real-time flicker frequency, a voltage real-time deviation value and a direct current real-time component after the electrochemical energy storage system is connected to the grid;
if the voltage harmonic real-time distortion rate does not exceed the voltage harmonic standard distortion rate, the voltage real-time flicker rate does not exceed the voltage standard flicker rate, the voltage real-time deviation value does not exceed the voltage standard deviation value and the direct current real-time component does not exceed the direct current real-time component, generating a detection normal signal, otherwise, respectively calculating a difference value of the voltage harmonic real-time distortion rate and the voltage harmonic standard distortion rate, a difference value of the voltage real-time flicker rate and the voltage standard flicker rate, a difference value of the voltage real-time deviation value and the voltage standard deviation value and a difference value of the direct current real-time component and the direct current standard component to obtain a voltage harmonic distortion rate difference value, a voltage flicker rate difference value, a voltage deviation difference value and a direct current component difference value of the electrochemical energy storage system;
and calculating the detection deviation value of the electrochemical energy storage system.
8. The device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test as claimed in claim 7, wherein the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system to a power distribution network, and the working process specifically comprises the following steps:
acquiring an access point used for grid connection of an electrochemical energy storage system, and then acquiring a preset detection deviation interval of the access point used by the electrochemical energy storage system and the quality grade of a power grid of the power grid connected with the access point;
finally, acquiring a detection normal signal of the electrochemical energy storage system or a detection deviation value of the electrochemical energy storage system and an energy storage quality grade of the electrochemical energy storage system;
if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point, and the electrochemical energy storage system generates a detection normal signal through simulation analysis or the detection deviation value of the electrochemical energy storage system is in a preset detection deviation interval, generating an access permission instruction;
if the energy storage quality grade of the chemical energy storage system corresponds to the power grid quality grade of the access point, but the detection deviation value of the electrochemical energy storage system is not in a preset detection deviation interval, generating a selective access instruction;
if the energy storage quality grade of the chemical energy storage system does not correspond to the power grid quality grade of the access point, but a detection normal signal is generated through simulation analysis of the electrochemical energy storage system or a detection deviation value of the electrochemical energy storage system is in a preset detection deviation interval, generating a selective access instruction;
and if the energy storage quality grade of the chemical energy storage system does not correspond to the power grid quality grade of the access point, and the detection deviation value of the electrochemical energy storage system is not in a preset detection deviation interval, generating an access refusing instruction.
9. The system for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test is applied to the device for detecting the grid-connected performance of the electrochemical energy storage system of the new energy station based on the multipoint synchronous test, which comprises the following components:
the management terminal is used for inputting electric energy data of the electrochemical energy storage system;
the electric energy quality analysis module is used for analyzing the energy storage quality of the electrochemical energy storage system;
the energy storage judging module is used for judging the energy storage quality of the electrochemical energy storage system;
the data acquisition module is used for acquiring real-time operation data after the electrochemical energy storage system is connected to the grid;
the management terminal is also used for inputting historical access data of access points used during grid connection of the electrochemical energy storage system and standard operation data of the electrochemical energy storage system after grid connection;
the simulation analysis module is used for performing simulation analysis on the working state of the electrochemical energy storage system after grid connection;
the intelligent grid-connected module is used for intelligently connecting the electrochemical energy storage system to a power distribution network;
and the execution module is used for carrying out grid-connected operation on the electrochemical energy storage system according to the instruction.
10. A new energy station electrochemical energy storage system grid-connection performance detection method based on a multipoint synchronous test is characterized in that the new energy station electrochemical energy storage system grid-connection performance detection device based on the multipoint synchronous test is as follows according to any one of claims 1-8:
step S101, inputting electric energy data of an electrochemical energy storage system by a management terminal, analyzing the energy storage quality of the electrochemical energy storage system through an electric energy quality analysis module, obtaining the electric energy quality value of the electrochemical energy storage system, and sending the electric energy quality value to an energy storage judgment module;
step S102, an energy storage judging module judges the energy storage quality of the electrochemical energy storage system to obtain the energy storage quality grade of the electrochemical energy storage system and sends the energy storage quality grade to an intelligent grid-connected module;
step S103, a data acquisition module acquires real-time operation data of the electrochemical energy storage system after grid connection, and meanwhile, a management terminal inputs historical access data of an access point used when the electrochemical energy storage system is connected to the grid and standard operation data of the electrochemical energy storage system after grid connection;
step S104, the simulation analysis module carries out simulation analysis on the working state of the electrochemical energy storage system after grid connection, and a detection normal signal generated by the simulation analysis or a detection deviation value of the electrochemical energy storage system is sent to the intelligent grid connection module;
and S105, intelligently accessing the electrochemical energy storage system to a power distribution network by the intelligent grid-connected module to obtain an access permission instruction, an access selection instruction or an access rejection instruction.
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