CN115906429A - Reliability evaluation method, device, equipment and storage medium for pumped storage unit - Google Patents
Reliability evaluation method, device, equipment and storage medium for pumped storage unit Download PDFInfo
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Abstract
A reliability evaluating method, a device, equipment and a storage medium of a pumped storage unit relate to time-consuming expense and effective number of super capacitor reliability, and the reliability is effective under the condition of a large range of initial electric quantity form and the time consumption of very low input electric quantity is also used; the method is suitable for being used under the conditions of different initial electric quantity forms, the electric quantity amplitude regression line can be used as the highest point and the lowest point of the reliability index, and the effect of the polarization of the super capacitor on the evaluation of the reliability form of the super capacitor can be eliminated; the invention is suitable for different input and output electric quantity processes (namely, the range from input and output electric quantity to the preset initial electric quantity form along with an increasing amplitude within the limit of the super capacitor) with effective reliability, and obtains more correct reliability form evaluation derivation quantity.
Description
Technical Field
The invention belongs to the technical field of pumped storage units, and particularly relates to a method, a device, equipment and a storage medium for evaluating the reliability of a pumped storage unit.
Background
Pumped storage, an energy storage technology. Namely, water is used as an energy storage medium, and electric energy is stored and managed through mutual conversion of electric energy and potential energy. The electric energy in the power load valley is utilized to pump water to the upper reservoir, and the water is discharged to the lower reservoir again in the power load peak period to generate power. The surplus electric energy when the load of the power grid is low can be converted into high-value electric energy during the peak period of the power grid. It is suitable for frequency modulation and phase modulation, and can stabilize the cycle and potential of power system, and can raise the efficiency of power station and nuclear power station.
The pumped storage has the functions of peak regulation, frequency modulation, phase modulation, energy storage, system standby, black start and the like, has the technical and economic advantages of large capacity, multiple working conditions, high speed, high reliability, good economy and the like, plays a fundamental role in ensuring the safety of a large power grid, promoting the consumption of new energy and improving the performance of the whole system, and is an important component of an energy internet. The method has the advantages that the development of pumped storage is accelerated, the method is an urgent requirement for constructing a novel power system, is an important support for ensuring the safe and stable operation of the power system, and is an important guarantee for the large-scale development of renewable energy sources.
The pumped storage power generation motor in the pumped storage unit, also called as a motor generator, is a motor which operates as a generator during power generation and operates as a motor during pumping.
The key of the energy storage device after the pumped storage generator motor generates electricity is the super capacitor, the correct evaluation of the reliability form of the super capacitor can effectively prevent the occurrence of overhigh input electric quantity, overhigh output electric quantity and even overhigh temperature of the super capacitor, and index help can be provided for the structure to effectively expand the specification of the application age of the super capacitor; at present, the reliability on a power consumption amplitude regression line is generally and directly selected according to the reliability form of the super capacitor evaluated by an electric quantity amplitude analysis method, and the constructed open source unit or the regressed correlation is not suitable for different situations of input and output electric quantity flows; the key is that the potential of the super capacitor deviates from the balance potential and the action of the input and output electric quantity amplitude, so that the partial reliability on the electric quantity amplitude regression line of the super capacitor with the same degradation structure is effectively changed under different input and output electric quantity processes.
The different flow of inputting and outputting electric quantity is the flow before the input and output electric quantity reaches the initial electric quantity form, that is, the super capacitor can output the electric quantity to the initial electric quantity form through the large electric quantity form and can also input the electric quantity to the initial electric quantity form through the low electric quantity form, and the stage of inputting and outputting the electric quantity can be executed by different amplitudes.
After the initial electric quantity form reached by different processes acts, the electric quantity is input to the electric potential quantity of the full electric quantity by the preset amplitude through the initial electric quantity form, and the reliability index on the electric quantity amplitude regression line formed by the electric potential quantity is changed, so that the reliability form deviation evaluated by the reliability index is increased.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a method, a device, equipment and a storage medium for evaluating the reliability of a pumped storage unit, which relate to time-consuming cost and effective number of super capacitor reliability, and select the reliability which is effective under the condition of large-scale initial electric quantity form and also use very low input electric quantity for time consumption; the method is suitable for being used under the conditions of different initial electric quantity forms, the electric quantity amplitude regression line can be used as the highest point and the lowest point of the reliability index, and the effect of the polarization of the super capacitor on the evaluation of the reliability form of the super capacitor can be eliminated; the invention selects and is suitable for the effective reliability of different input and output electric quantity flows (namely, the range from input and output electric quantity to the preset initial electric quantity form along with a fluctuation range within the limit of the super capacitor), and obtains more correct reliability form evaluation deduction quantity.
The invention adopts the following technical scheme.
A reliability evaluation method for a pumped storage unit comprises the following steps:
s1: determining an initial electric quantity form when electric quantity is input to a super capacitor electrically connected with the pumped storage generator motor and a previous flow when the electric quantity reaches the initial electric quantity form, and taking the previous flow as an input and output electric quantity flow;
s2: selecting corresponding reliability to be effective according to the input and output electric quantity processes and the category of the initial electric quantity form;
s3: obtaining the reliability effectiveness on the electric quantity amplitude regression line according to the previous degradation information, and constructing the correlation relation between the reliability effectiveness and the reliability form of the super capacitor;
s4: and (4) effectively combining the reliability obtained in the step (S2) into the corresponding relation of the step (S3) to evaluate the reliability form of the super capacitor in real time.
Preferably, two conditions are determined for the initial electric quantity form when the electric quantity is input to the super capacitor electrically connected with the pumped storage generator motor and the previous flow when the electric quantity form is reached:
a first condition comprising:
s1-1-1: the super capacitor reaches an initial electric quantity form by a low electric quantity form and an input electric quantity mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-1-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the evaluation quantity of the round is the same as that of the previous round;
s1-1-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X1 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-1-3: if the initial electric quantity form is in the category of { two preset quantities, one preset quantity }, selecting the place of the lowest point X2 as the reliability valid so as to evaluate the reliability form of the super capacitor;
a second condition comprising:
s1-2-1: the super capacitor reaches an initial electric quantity form through a large electric quantity form by using an electric quantity output mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-2-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the round of evaluation measurement is the same as the previous round of evaluation measurement;
s1-2-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X3 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-2-3: if the initial electric quantity form is in the range of { the second preset quantity, the first preset quantity }, the place where the second highest point X4 is located is selected as the effective reliability, and the reliability form of the super capacitor is evaluated.
Preferably, the electric quantity fluctuation regression line is as follows:
the regression line equation is plotted, here: h is the electric quantity of the super capacitor, S is the area of one polar plate of the super capacitor, L is the current of the super capacitor, and m is time.
Preferably, the electric quantity amplitude regression line is a smooth electric quantity amplitude regression line obtained after interference is cleared by using a neighborhood average method, a weighted moving average algorithm, an arithmetic average algorithm or a kalman algorithm.
Preferably, the S3 specifically includes: obtaining the electric quantity amplitude regression line of the super capacitor with different degradation quantities, and extracting the selected reliability in the electric quantity amplitude regression line by the methods from S1 to S4; next, a correlation between the selected reliability valid and supercapacitor reliability configurations is constructed via least squares.
A reliability evaluating device of a pumped storage unit comprises:
the system comprises a determination unit, a storage unit and a control unit, wherein the determination unit is used for determining an initial electric quantity form when electric quantity is input to a super capacitor electrically connected with a pumped storage generator motor and a previous flow when the electric quantity reaches the initial electric quantity form, and the previous flow is taken as an input and output electric quantity flow;
the selection unit is used for selecting corresponding reliability and effectiveness according to the input and output electric quantity process and the category where the initial electric quantity form is located;
the construction unit is used for acquiring the reliability effectiveness on the electric quantity amplitude regression line according to the previous degradation information, and constructing the correlation relation between the reliability effectiveness and the reliability form of the super capacitor;
and the evaluation unit is used for effectively combining the obtained reliability into the corresponding relation so as to evaluate the reliability form of the super capacitor in real time.
Preferably, two conditions are determined for the initial electric quantity form when the electric quantity is input to the super capacitor electrically connected with the pumped storage generator motor and the previous flow when the electric quantity form is reached:
a first condition comprising:
s1-1-1: the super capacitor reaches an initial electric quantity form by a low electric quantity form in an electric quantity input mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-1-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the evaluation quantity of the round is the same as that of the previous round;
s1-1-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X1 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-1-3: if the initial electric quantity form is in the category of { two preset quantities, one preset quantity }, selecting the place of the lowest point X2 as the reliability valid so as to evaluate the reliability form of the super capacitor;
a second condition comprising:
s1-2-1: the super capacitor reaches an initial electric quantity form through a large electric quantity form by using an electric quantity output mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-2-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the round of evaluation measurement is the same as the previous round of evaluation measurement;
s1-2-2: judging whether the initial electric quantity form is lower than a preset quantity two, if so, selecting the position of the highest point X3 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-2-3: if the initial electric quantity form is in the range of { the second preset quantity, the first preset quantity }, the place where the second highest point X4 is located is selected as the effective reliability, and the reliability form of the super capacitor is evaluated.
Preferably, the electric quantity fluctuation regression line is as follows:
the regression line equation is plotted, here: h is the electric quantity of the super capacitor, S is the area of one polar plate of the super capacitor, L is the current of the super capacitor, and m is time.
Preferably, the electric quantity amplitude regression line is a smooth electric quantity amplitude regression line obtained after interference is cleared by using a neighborhood average method, a weighted moving average algorithm, an arithmetic average algorithm or a kalman algorithm.
Preferably, the construction unit is further configured to obtain electric quantity fluctuation regression lines of supercapacitors with different degradation quantities, wherein the reliability of extraction and selection by the methods S1 to S4 is effective; next, a correlation between the selected reliability valid and supercapacitor reliability configurations is constructed via least squares.
A terminal comprising a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is used for executing operation according to the instruction so as to execute the step of the reliability evaluation method according to the pumped storage unit.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for reliability assessment of a pumped-storage aggregate.
Compared with the prior art, the invention has the advantages that the invention relates to the time-consuming expense and the effective number of the super capacitor reliability, the reliability under the condition of the initial electric quantity form in a large range is effective, and the time consumption of the input electric quantity is very low; the method is suitable for the conditions of different initial electric quantity forms, the maximum point and the minimum point which can be used as reliability indexes on the electric quantity amplitude regression line can be selected, and the effect of the polarization of the super capacitor on the evaluation of the reliability form of the super capacitor can be eliminated; the invention selects and is suitable for the effective reliability of different input and output electric quantity flows (namely, the range from input and output electric quantity to the preset initial electric quantity form along with a fluctuation range within the limit of the super capacitor), and obtains more correct reliability form evaluation deduction quantity.
Drawings
FIG. 1 is an overall flow chart of a reliability evaluation method for a pumped storage unit according to the invention;
fig. 2 is a structural diagram of the reliability evaluation device of the pumped storage unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely expressed in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments presented in this application are only some embodiments, not all embodiments, of the invention. Based on the spirit of the invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the invention.
As shown in fig. 1, the method for evaluating the reliability of a pumped storage group according to the present invention includes:
s1: determining an initial electric quantity form and a previous flow for reaching the electric quantity form when the electric quantity is input to a super capacitor electrically connected with the pumped storage generator motor, and taking the previous flow as an input and output electric quantity flow;
s2: selecting corresponding reliability to be effective according to the input and output electric quantity flow and the category of the initial electric quantity form;
s3: obtaining the reliability effectiveness on the electric quantity amplitude regression line according to the previous degradation information, and constructing the correlation relation between the reliability effectiveness and the reliability form of the super capacitor;
s4: and (4) effectively combining the reliability obtained in the step (S2) into the corresponding relation of the step (S3) to evaluate the reliability form of the super capacitor in real time.
In a preferred but non-limiting embodiment of the present invention, there are two situations in the initial power state when the power is input to the super capacitor electrically connected to the pumped storage generator motor and the previous flow to reach the power state:
a first condition comprising:
s1-1-1: the super capacitor reaches an initial electric quantity form by a low electric quantity form and an input electric quantity mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-1-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the evaluation quantity of the round is the same as that of the previous round;
s1-1-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X1 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-1-3: if the initial electric quantity form is in the category of { two preset quantities, one preset quantity }, selecting the place of the lowest point X2 as the reliability valid so as to evaluate the reliability form of the super capacitor; the electricity quantity form is the electricity quantity.
A second condition comprising:
s1-2-1: the super capacitor reaches an initial electric quantity form through a large electric quantity form by using an electric quantity output mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-2-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the round of evaluation measurement is the same as the previous round of evaluation measurement;
s1-2-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X3 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-2-3: if the initial electric quantity form is in the range of { the second preset quantity, the first preset quantity }, the place where the second highest point X4 is located is selected as the effective reliability, and the reliability form of the super capacitor is evaluated.
The preset quantity and the preset input electric quantity increase amplitude are determined by actual requirements, and the initial electric quantity is also determined by the actual requirements. The following describes the method for identifying the actual indicators or derived quantities of S1 to S4:
in a preferred but non-limiting embodiment of the present invention, the electric quantity fluctuation analysis method is first applied to obtain the electric quantity fluctuation regression line; under the existing constant current fixed position small amplitude input electric quantity specification, the electric quantity amplitude regression line can pass through:
the regression line equation is plotted, here: h is the electric quantity of the super capacitor, S is the area of one polar plate of the super capacitor, L is the current of the super capacitor, and m is time, so that the change speed of the electric potential of the super capacitor can be changed into the highest point or the lowest point which is not difficult to be identified on the electric quantity amplitude regression line. During the period of electronic input and output of the super capacitor, the electric quantity amplitude regression line is deeply related to the change of the phase angle change stage, and the reliability form of the super capacitor can be evaluated by extracting the attributes of the regression line, such as the position of the highest point or the lowest point on the electric quantity amplitude regression line, the range enclosed by the amplitude and the regression line, and the like;
in a preferred but non-limiting embodiment of the present invention, the electric quantity amplitude-rising regression line in the present invention is a smooth electric quantity amplitude-rising regression line obtained after interference is cleared by using a neighborhood average method, a weighted moving average algorithm, an arithmetic average algorithm or a kalman algorithm. The different input and output electric quantity process conditions of the super capacitor obtain different electric quantity amplitude regression lines.
In the example of the change condition of the electric quantity amplitude regression line under different flow conditions of input and output electric quantity, when the electric quantity of the super capacitor is zero, the electric quantity is input to the initial electric quantity, and in the range that the electric quantity of the super capacitor is not higher than zero and is not lower than twenty percent of the input electric quantity, the amplitude quantity of the highest point of the electric quantity amplitude regression line is changed insignificantly, so that the change can be omitted, and the position of the highest point, the position of the lowest point and the amplitude quantity or the position of the next highest point are not changed basically; in the range that the electric quantity of the super capacitor is higher than twenty percent of the sufficient electric quantity and is not higher than fifty percent of the sufficient electric quantity, the amplitude quantity and the position of the highest point are changed, and the position of the lowest point and the position of the next highest point are basically not changed.
The electric quantity of the super capacitor outputs the electric quantity to the initial electric quantity through the sufficient electric quantity, and in the range that the electric quantity of the super capacitor is not lower than zero and not higher than twenty percent of the sufficient electric quantity, the amplitude quantity of the highest point of the electric quantity amplitude regression line and the position where the amplitude quantity is changed are not changed obviously, and the change can be omitted; in the category that the electric quantity of the super capacitor is more than twenty percent of the enough electric quantity and is not more than fifty percent of the enough electric quantity, the amplitude quantity of the highest point and the lowest point is obviously changed with the position, the amplitude quantity of the next highest point is not slightly changed, and the position of the next highest point X4 is basically not changed.
In a word, the conditions of different input and output electric quantity processes are involved, under the condition that the first condition is from low electric quantity input electric quantity to initial electric quantity form, in the category that the electric quantity of a super capacitor is not lower than zero and is not higher than twenty percent of sufficient electric quantity, the amplitude value and the position of the highest point are selected as effective reliability; in the range that the electric quantity of the super capacitor is more than twenty percent of the enough electric quantity and is not more than fifty percent of the enough electric quantity, the reliability form of the super capacitor is evaluated according to the position of the lowest point as the effective reliability; when the electric quantity of the super capacitor is higher than fifty percent of the full electric quantity, the reliability form evaluation measurement is the same as the previous evaluation measurement; under the condition that the electric quantity is output to the initial electric quantity form through high electric quantity, in the scope that the electric quantity of the super capacitor is not lower than zero and not higher than twenty percent of the enough electric quantity, the amplitude of the highest point and the position where the amplitude is used are taken as reliability and effective; in the range that the electric quantity of the super capacitor is more than twenty percent of the enough electric quantity and is not more than fifty percent of the enough electric quantity, the reliability form of the super capacitor is evaluated according to the fact that the position of the next highest point is taken as the reliability effective; when the electric quantity of the super capacitor is higher than fifty percent of the electric quantity of the foot, the reliability shape evaluation measurement is the same as the evaluation measurement of the previous round.
In a preferred but non-limiting embodiment of the invention, said S3 comprises in particular: constructing a correlation relation by using the previous degradation information, namely acquiring information of the full electric quantity and the zero electric quantity of the super capacitors with different degradation quantities, thereby acquiring the electric quantity amplitude regression line of the super capacitors with different degradation quantities, and extracting the reliability and effectiveness of selection by using the methods from S1 to S4 in the regression line; next, a correlation between the selected reliability valid and supercapacitor reliability configurations is constructed via a least squares method. The amount of degradation represents the decrement of the sufficient charge of the super capacitor.
The method thus identified, which is morphologically correct for evaluating the reliability of the supercapacitor, is demonstrated herein using the exemplary method; the electric quantity of the super capacitor with the foot electric quantity of which the current reliability form is ninety-one percent is selected, the electric quantity is input by using the specified amplitude under the condition of different initial electric quantity forms, the reliability on the obtained electric quantity amplitude regression line is effective, the electric quantity amplitude regression line is combined into the regressed association, the evaluation quantity of the reliability form is obtained, and the evaluation quantity is compared with the real quantity execution reference, and the conclusion is that the precision deviation does not exceed one point two of ten thousandths.
As shown in fig. 2, the reliability evaluating device for a pumped storage unit according to the present invention includes:
. The water pumping energy storage power generation motor is electrically connected with the super capacitor, the water pumping energy storage power generation motor is used for inputting generated electric quantity into the super capacitor for energy storage, the super capacitor is electrically connected with electric appliances such as electric lamps and refrigerators of users, and the super capacitor is used for outputting the stored electric quantity to the electric appliances for power supply.
The identifying unit is used for identifying an initial electric quantity form when electric quantity is input to a super capacitor electrically connected with the pumped storage generator motor and a previous flow of reaching the electric quantity form, and taking the previous flow as an input and output electric quantity flow;
the selection unit is used for selecting corresponding reliability and effectiveness according to the input and output electric quantity process and the category where the initial electric quantity form is located;
the construction unit is used for obtaining the reliability effectiveness on the electric quantity amplitude regression line according to the previous degradation information and constructing the correlation relation between the reliability effectiveness and the reliability form of the super capacitor;
and the evaluation unit is used for effectively combining the obtained reliability into the corresponding relation so as to evaluate the reliability form of the super capacitor in real time.
In a preferred but non-limiting embodiment of the present invention, two situations are identified between the initial power configuration when power is input to the super capacitor electrically connected to the pumped storage generator motor and the previous flow of reaching the power configuration:
a first condition comprising:
s1-1-1: the super capacitor reaches an initial electric quantity form by a low electric quantity form and an input electric quantity mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-1-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the evaluation quantity of the round is the same as that of the previous round;
s1-1-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X1 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-1-3: if the initial electric quantity form is in the category of { two preset quantities, one preset quantity }, selecting the place of the lowest point X2 as the reliability valid so as to evaluate the reliability form of the super capacitor;
a second condition comprising:
s1-2-1: the super capacitor reaches an initial electric quantity form through a large electric quantity form by using an electric quantity output mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is transferred to S1-2-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the round of evaluation measurement is the same as the previous round of evaluation measurement;
s1-2-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X3 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-2-3: if the initial electric quantity form is in the category of { preset quantity two, preset quantity one }, the place of the second highest point X4 is selected as the place with effective reliability, so as to evaluate the reliability form of the super capacitor.
In a preferred but non-limiting embodiment of the invention, the electric quantity fluctuation regression line is:
the regression line equation is plotted, here: h is the electric quantity of the super capacitor, S is the area of one polar plate of the super capacitor, L is the current of the super capacitor, and m is time.
In a preferred but non-limiting embodiment of the present invention, the electric quantity fluctuation regression line is a smooth electric quantity fluctuation regression line obtained after interference is cleared by using a neighborhood average method, a weighted moving average algorithm, an arithmetic average algorithm or a kalman algorithm.
In a preferred but non-limiting embodiment of the present invention, the configuration unit is further configured to obtain regression lines of electric quantity fluctuation of super capacitors with different degradation quantities, in which the reliability of extraction and selection by the methods of S1 to S4 is effective; next, a correlation between the selected reliability valid and supercapacitor reliability configurations is constructed via least squares.
The invention relates to a terminal, which comprises a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is used for executing operation according to the instruction so as to execute the step of the reliability evaluation method according to the pumped storage unit.
The invention relates to a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for evaluating the reliability of a pumped-storage group.
Compared with the prior art, the invention has the advantages that the invention relates to the time-consuming expense and the effective number of the super capacitor reliability, the reliability under the condition of the initial electric quantity form in a large range is effective, and the time consumption of the input electric quantity is very low; the method is suitable for being used under the conditions of different initial electric quantity forms, the electric quantity amplitude regression line can be used as the highest point and the lowest point of the reliability index, and the effect of the polarization of the super capacitor on the evaluation of the reliability form of the super capacitor can be eliminated; the invention selects and is suitable for the effective reliability of different input and output electric quantity flows (namely, the range from input and output electric quantity to the preset initial electric quantity form along with a fluctuation range within the limit of the super capacitor), and obtains more correct reliability form evaluation deduction quantity.
The present disclosure can be a system, method, and/or computer program product. The computer program product can include a computer readable backup medium having computer readable program instructions embodied thereon for causing a processor to achieve aspects of the disclosure.
The computer readable backup medium can be a tangible grid line capable of holding and backing up instructions for use by the instruction execution grid line. The computer readable backup medium can be, but is not limited to, an electrical backup grid line, a magnetic backup grid line, an optical backup grid line, an electromagnetic backup grid line, a semiconductor backup grid line or any suitable combination of the above. Still further examples (a non-exhaustive list) of the computer-readable backup medium include: a portable computer diskette, a hard disk, a random access backup device (RAM), a read-only backup device (ROM), an erasable programmable read-only backup device (EPROM or flash memory), a static random access backup device (SRAM), a portable compact disc read-only backup device (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanically encoded power grid line, a punch card or an in-groove raised structure as if instructions were backed up thereon, any suitable combination of the foregoing. The computer-readable backup medium as employed herein is not to be construed as a transitory signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating via a waveguide or other transmission medium (like a light pulse via a power line cable), or an electrical signal transmitted via an electrical wire.
The computer readable program instructions expressed herein can be downloaded from a computer readable backup medium to the respective computing/processing grid line, or to an external computer or external backup grid line via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network can include copper transmission cables, power line transmissions, wireless transmissions, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each calculation/processing grid line receives the computer readable program instructions from the network and forwards the computer readable program instructions for storage in the computer readable backup media in each calculation/processing grid line.
The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, situation-specific default information, or source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as sdaltala, C + +, or the like, and a generalized procedural programming language such as the "C" language or similar programming languages. The computer readable program instructions may execute entirely on the client computer, partly on the client computer, as a stand-alone software package, partly on the client computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the client computer through any other network, including a local area network (LAb) or a wide area network (WAb), or the connection can be made to an external computer (as through the internet using an internet service provider). In some embodiments, aspects of the present disclosure are achieved by personalizing an electronic circuit, like a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA), with status information of computer-readable program instructions, the electronic circuit being capable of executing the computer-readable program instructions.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which should be construed to be within the scope of the claims.
Claims (10)
1. A reliability evaluation method of a pumped storage unit is characterized by comprising the following steps:
s1: determining an initial electric quantity form when electric quantity is input to a super capacitor electrically connected with the pumped storage generator motor and a previous flow when the electric quantity reaches the initial electric quantity form, and taking the previous flow as an input and output electric quantity flow;
s2: selecting corresponding reliability to be effective according to the input and output electric quantity flow and the category of the initial electric quantity form;
s3: obtaining the reliability effectiveness on the electric quantity amplitude regression line according to the previous degradation information, and constructing the correlation relation between the reliability effectiveness and the reliability form of the super capacitor;
s4: and (4) effectively combining the reliability obtained in the step (S2) into the corresponding relation of the step (S3) to evaluate the reliability form of the super capacitor in real time.
2. The method for evaluating the reliability of the pumped-storage group according to claim 1, wherein the initial electric quantity form when the electric quantity is input to the super capacitor electrically connected with the pumped-storage generator motor and the previous flow when the electric quantity form is reached are determined to have two conditions:
a first condition comprising:
s1-1-1: the super capacitor reaches an initial electric quantity form by a low electric quantity form in an electric quantity input mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-1-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the evaluation quantity of the round is the same as that of the previous round;
s1-1-2: judging whether the initial electric quantity form is lower than a preset quantity two, if so, selecting the position of the highest point X1 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-1-3: if the initial electric quantity form is in the category of { two preset quantities, one preset quantity }, selecting the place of the lowest point X2 as the reliability valid so as to evaluate the reliability form of the super capacitor;
a second condition comprising:
s1-2-1: the super capacitor reaches an initial electric quantity form through a large electric quantity form by using an electric quantity output mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-2-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the round of evaluation measurement is the same as the previous round of evaluation measurement;
s1-2-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X3 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-2-3: if the initial electric quantity form is in the range of { the second preset quantity, the first preset quantity }, the place where the second highest point X4 is located is selected as the effective reliability, and the reliability form of the super capacitor is evaluated.
3. The method for evaluating the reliability of the pumped storage unit according to claim 1, wherein the electric quantity fluctuation regression line is as follows:
the regression line equation is plotted, here: h is the electric quantity of the super capacitor, S is the area of one polar plate of the super capacitor, L is the current of the super capacitor, and m is time.
4. The method for evaluating the reliability of the pumped storage unit according to claim 3, wherein the electric quantity amplitude regression line is a smooth electric quantity amplitude regression line obtained after interference is cleared by using a neighborhood average method, a weighted moving average algorithm, an arithmetic average algorithm or a Kalman algorithm;
the S3 specifically includes: obtaining the electric quantity amplitude regression line of the super capacitors with different degradation quantities, wherein the reliability of extraction and selection by the methods from S1 to S4 is effective; next, a correlation between the selected reliability valid and supercapacitor reliability configurations is constructed via least squares.
5. The utility model provides a reliability evaluation device of pumped storage unit which characterized in that includes:
the system comprises a determination unit, a storage unit and a control unit, wherein the determination unit is used for determining an initial electric quantity form when electric quantity is input to a super capacitor electrically connected with a pumped storage generator motor and a previous flow when the electric quantity reaches the initial electric quantity form, and the previous flow is taken as an input and output electric quantity flow;
the selection unit is used for selecting corresponding reliability and effectiveness according to the input and output electric quantity process and the category where the initial electric quantity form is located;
the construction unit is used for acquiring the reliability effectiveness on the electric quantity amplitude regression line according to the previous degradation information, and constructing the correlation relation between the reliability effectiveness and the reliability form of the super capacitor;
and the evaluation unit is used for effectively combining the obtained reliability into the corresponding relation so as to evaluate the reliability form of the super capacitor in real time.
6. The pumped-storage group reliability evaluation device according to claim 5, wherein the initial power state when the power input to the super capacitor electrically connected to the pumped-storage generator motor is determined and the previous process of reaching the power state have two conditions:
a first condition comprising:
s1-1-1: the super capacitor reaches an initial electric quantity form by a low electric quantity form in an electric quantity input mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-1-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the evaluation quantity of the round is the same as that of the previous round;
s1-1-2: judging whether the initial electric quantity form is lower than a preset quantity two, if so, selecting the position of the highest point X1 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-1-3: if the initial electric quantity form is in the category of { two preset quantities, one preset quantity }, selecting the place of the lowest point X2 as the reliability valid so as to evaluate the reliability form of the super capacitor;
a second condition comprising:
s1-2-1: the super capacitor reaches an initial electric quantity form through a large electric quantity form by using an electric quantity output mode, if the initial electric quantity form is lower than a preset quantity one, the super capacitor is switched to S1-2-2 to be executed, and if the initial electric quantity form is not lower than the preset quantity one, the round of evaluation measurement is the same as the previous round of evaluation measurement;
s1-2-2: determining whether the initial electric quantity form is lower than a second preset quantity, if so, selecting the position of the highest point X3 or the amplitude quantity as the effective reliability, and evaluating the reliability form of the super capacitor;
s1-2-3: if the initial electric quantity form is in the range of { the second preset quantity, the first preset quantity }, the place where the second highest point X4 is located is selected as the effective reliability, and the reliability form of the super capacitor is evaluated.
7. The reliability evaluation device of the pumped storage unit according to claim 5, wherein the electric quantity amplitude regression line is defined by:
the regression line equation is plotted, here: h is the electric quantity of the super capacitor, S is the area of one polar plate of the super capacitor, L is the current of the super capacitor, and m is time.
8. The reliability evaluation device of the pumped storage unit according to claim 7, wherein the electric quantity amplitude regression line is a smooth electric quantity amplitude regression line obtained after interference is cleared by using a neighborhood average method, a weighted moving average algorithm, an arithmetic average algorithm or a Kalman algorithm;
the construction unit is also used for obtaining the electric quantity amplitude regression line of the super capacitors with different degradation quantities, and the reliability of the selection is effectively extracted by the methods from S1 to S4; next, a correlation between the selected reliability valid and supercapacitor reliability configurations is constructed via least squares.
9. A terminal comprising a processor and a storage medium; the method is characterized in that:
the storage medium is to store instructions;
the processor is used for operating according to the instruction to execute the steps of the reliability evaluating method of the pumped-storage unit according to any one of claims 1-4.
10. Computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the method for reliability assessment of a pumped-hydro energy storage group according to any of claims 1 to 4.
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