A method, device, equipment and medium for evaluating the health of a high-voltage switch

Abstract

The present invention proposes a method, device, equipment and medium for evaluating the health of a high-voltage switch, including obtaining the operating characteristic information of the high-voltage switch, and obtaining the health index of the high-voltage switch according to the operating characteristic information; the power distribution terminal controls and detects the high-voltage switch according to the health index to obtain the first input parameter of the high-voltage switch; constructs a health evaluation algorithm for the high-voltage switch, inputs the first input parameter into the health evaluation algorithm to obtain multiple attenuation coefficients of the high-voltage switch; and calculates the real-time health of the high-voltage switch according to the attenuation coefficient. According to the technical solution of this embodiment, the health index of the high-voltage switch is extracted, the operating status of the high-voltage switch is monitored in real time, the constructed health evaluation algorithm obtains the attenuation coefficient of the high-voltage switch, and the real-time health of the high-voltage switch is calculated according to the attenuation coefficient, so as to realize effective load disconnection and isolation of the high-voltage switch and avoid further expansion when a power accident occurs to the high-voltage switch.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution transformer protection, and in particular to a method, device, equipment and medium for evaluating the health of a high-voltage switch. Background Art

[0002] High-voltage switches are used to control the transmission of power in high-voltage circuits and to provide fault protection and fault isolation for transmission lines. Since there are many factors affecting the health of high-voltage switches, the health assessment methods of high-voltage switches in the prior art cannot effectively assess the health of high-voltage switches. Once the health of a high-voltage switch is too low, causing a power failure in the distribution line, effective load disconnection or isolation cannot be achieved, resulting in further power accidents. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a high-voltage switch health evaluation method, device, equipment and medium, which can effectively evaluate the health of the high-voltage switch.

[0004] In a first aspect, an embodiment of the present invention provides a method for evaluating the health of a high-voltage switch, comprising:

[0005] Acquiring operating characteristic information of the high-voltage switch, and obtaining a health indicator of the high-voltage switch according to the operating characteristic information;

[0006] The power distribution terminal controls and detects the high-voltage switch according to the health index to obtain a first input parameter of the high-voltage switch;

[0007] Constructing a health evaluation algorithm for the high-voltage switch, inputting the first input parameter into the health evaluation algorithm, and counting a plurality of operating curves of the high-voltage switch, and calculating a plurality of attenuation coefficients of the high-voltage switch according to the plurality of operating curves;

[0008] Calculating a plurality of health indicators of the high-voltage switch according to the plurality of attenuation coefficients, and acquiring an initial health indicator of the high-voltage switch;

[0009] The difference between the initial health and the plurality of health indicators is calculated to obtain the real-time health of the high-voltage switch.

[0010] In some embodiments of the present invention, obtaining the first input parameter of the high voltage switch includes:

[0011] Acquire a first time when the power distribution terminal sends a first signal, and a second time when the high-voltage switch completes an opening or closing action according to the first time, and calculate an action time of the high-voltage switch according to the first time and the second time;

[0012] Obtaining a first time integral of an operating voltage of the high-voltage switch and a second time integral of an operating current of the high-voltage switch, and calculating energy consumption of the high-voltage switch according to the first time integral and the second time integral;

[0013] Acquire a first energy storage signal and a second energy storage signal of the high-voltage switch, and calculate the energy storage charging completion time of the high-voltage switch according to the first energy storage signal and the second energy storage signal, wherein the first energy storage signal is the closing time after the high-voltage switch completes the current closing, and the second energy storage signal is the closing time after the high-voltage switch completes the next closing;

[0014] Obtaining an operating voltage and an operating current of an energy storage circuit of the high-voltage switch, obtaining a third time integral of the operating voltage and a second time integral of the operating current, and calculating energy storage charging energy of the energy storage circuit according to the first time integral and the second time integral;

[0015] The three-phase terminal temperature and the ambient temperature of the high-voltage switch are obtained, and the closing contact temperature rise of the high-voltage switch is calculated according to the three-phase terminal temperature and the ambient temperature.

[0016] In some embodiments of the present invention, the step of calculating the real-time health of the high-voltage switch according to the plurality of attenuation coefficients includes:

[0017] Obtaining the initial health, service life, life attenuation coefficient of switch breaking times, life attenuation coefficient of annual inspection, opening and closing action time attenuation coefficient, opening and closing energy attenuation coefficient, energy storage charging completion time attenuation coefficient, energy storage charging energy attenuation coefficient, and switch contact temperature rise attenuation coefficient of the high-voltage switch;

[0018] The real-time health of the high-voltage switch is calculated based on the initial health, the service life, the life attenuation coefficient of the number of switch disconnections, the annual inspection life attenuation coefficient, the opening and closing action time attenuation coefficient, the opening and closing energy attenuation coefficient, the energy storage charging completion time attenuation coefficient, the energy storage charging energy attenuation coefficient, and the switch contact temperature rise attenuation coefficient.

[0019] In some embodiments of the present invention, after obtaining the real-time health of the high-voltage switch, the method further includes:

[0020] determining an attenuation range of a plurality of said attenuation coefficients;

[0021] According to the plurality of attenuation ranges, a first-level warning interval, a second-level warning interval and a third-level warning interval are constructed, which decrease in stages;

[0022] A first-level warning delay for the first-level warning interval, a second-level warning delay for the second-level warning interval, and a third-level warning delay for the third-level warning interval are set.

[0023] In some embodiments of the present invention, after setting the first-level warning delay of the first-level warning interval, the second-level warning delay of the second-level warning interval, and the third-level warning delay of the third-level warning interval, the method further includes:

[0024] When the plurality of attenuation ranges are not within the first warning interval, the second warning interval, and the third warning interval, generating warning information;

[0025] The power distribution master station issues an alarm based on the early warning information.

[0026] In some embodiments of the present invention, the calculating of the plurality of attenuation coefficients of the high-voltage switch according to the plurality of operating curves comprises:

[0027] Acquire multiple rated current intervals, equivalent times, actual occurrence times and equivalent attenuation times of the interrupting current of the high-voltage switch, and calculate the switch interruption times life attenuation coefficient of the segmented current according to the rated current intervals, the equivalent times, the actual occurrence times and the equivalent attenuation times;

[0028] Obtain the opening action time and closing action time of the high-voltage switch, calculate a first operation curve of the high-voltage switch according to the opening action time and the closing action time, and calculate the opening and closing action time attenuation coefficient according to the first operation curve;

[0029] Obtaining an opening energy consumption value and a closing energy consumption value of the high-voltage switch, calculating a second operation curve of the high-voltage switch according to the opening energy consumption value and the closing energy consumption value, and calculating the opening and closing energy attenuation coefficient according to the second operation curve;

[0030] Acquire the energy storage charging completion time of the high-voltage switch, calculate a third operation curve of the high-voltage switch according to the energy storage charging completion time, and calculate an attenuation coefficient of the energy storage charging completion time according to the third operation curve;

[0031] Acquire the energy value of the energy storage charging energy of the high-voltage switch, calculate a fourth operation curve of the high-voltage switch according to the energy storage charging energy value, and calculate an attenuation coefficient of the energy storage charging energy value according to the fourth operation curve;

[0032] A temperature operation curve and a plurality of temperature intervals of the switch contact are obtained, and a temperature rise attenuation coefficient of the switch contact is calculated according to the temperature operation curve and the plurality of temperature intervals.

[0033] In some embodiments of the present invention, the step of calculating the closing contact temperature rise of the high-voltage switch according to the three-phase terminal temperature and the ambient temperature includes:

[0034] A temperature measuring ring is placed on the three-phase voltage terminal of the high-voltage switch, and the temperature measuring ring collects the temperature of the three-phase terminal posts and the ambient temperature of the three-phase voltage terminal;

[0035] A temperature receiving device is connected to the power distribution terminal, and the temperature receiving device is communicatively connected to the temperature measuring ring;

[0036] The communication frequency band between the temperature measuring ring and the temperature receiving device is determined so that the power distribution terminal can obtain the temperature of the three-phase terminal and the ambient temperature.

[0037] In a second aspect, an embodiment of the present invention provides a high-voltage switch health assessment device, comprising at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the high-voltage switch health assessment method as described in the first aspect above.

[0038] In a third aspect, an embodiment of the present invention provides an electronic device, comprising the high-voltage switch health assessment device as described in the second aspect above.

[0039] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the high-voltage switch health assessment method as described in the first aspect above.

[0040] The high-voltage switch health assessment method according to the embodiment of the present invention has at least the following beneficial effects:

[0041] The operation characteristic information of the high-voltage switch is obtained, and the health index of the high-voltage switch is obtained according to the operation characteristic information; the power distribution terminal controls and detects the high-voltage switch according to the health index to obtain a first input parameter of the high-voltage switch; a health evaluation algorithm for the high-voltage switch is constructed, and the first input parameter is input into the health evaluation algorithm to obtain multiple attenuation coefficients of the high-voltage switch; the real-time health of the high-voltage switch is calculated according to the multiple attenuation coefficients. According to the technical solution of this embodiment, the health index of the high-voltage switch is extracted according to the operation control characteristics of the high-voltage switch, the operation status of the high-voltage switch is monitored in real time, the attenuation coefficient of the high-voltage switch is obtained through the constructed health evaluation algorithm, and the real-time health of the high-voltage switch is calculated according to the attenuation coefficient, thereby realizing effective load disconnection and isolation of the high-voltage switch, and avoiding further expansion when a power accident occurs to the high-voltage switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a flow chart of a method for evaluating the health of a high-voltage switch provided by an embodiment of the present invention;

[0043] Figure 2 is a flow chart for obtaining a first input parameter of a high voltage switch provided by the present invention;

[0044] Figure 3 The present invention provides a flow chart for calculating the real-time health of a high-voltage switch according to a plurality of attenuation coefficients;

[0045] Figure 4 It is a flow chart after calculating the real-time health of the high-voltage switch provided by the present invention;

[0046] Figure 5 It is a flow chart of setting multiple warning intervals and warning delays provided by the present invention;

[0047] Figure 6 is a flow chart for obtaining multiple attenuation coefficients provided by the present invention;

[0048] Figure 7 The present invention provides a flow chart for calculating the temperature rise of the closing contacts of a high-voltage switch according to the three-phase terminal temperature and the ambient temperature;

[0049] Figure 8 is a structural diagram of a high-voltage switch health assessment device provided by another embodiment of the present invention;

[0050] Fig. 9 It is a structural schematic diagram of the power distribution system provided by the present invention. DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0054] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0055] An embodiment of the present invention provides a method for evaluating the health of a high-voltage switch, including obtaining operating characteristic information of the high-voltage switch, and obtaining a health index of the high-voltage switch according to the operating characteristic information; the power distribution terminal controls and detects the high-voltage switch according to the health index to obtain a first input parameter of the high-voltage switch; constructs a health evaluation algorithm for the high-voltage switch, inputs the first input parameter into the health evaluation algorithm, and obtains a plurality of attenuation coefficients of the high-voltage switch; and calculates the real-time health of the high-voltage switch according to the plurality of attenuation coefficients. According to the technical solution of this embodiment, the health index of the high-voltage switch is extracted according to the operating control characteristics of the high-voltage switch, the operating state of the high-voltage switch is monitored in real time, the attenuation coefficient of the high-voltage switch is obtained by the constructed health evaluation algorithm, and the real-time health of the high-voltage switch is calculated according to the attenuation coefficient, thereby realizing effective load disconnection and isolation of the high-voltage switch, and avoiding further expansion when a power accident occurs to the high-voltage switch.

[0056] The control method of the embodiment of the present invention is further described below based on the accompanying drawings.

[0057] Reference Figure 1 , Figure 1 A flowchart of a high-voltage switch health assessment method provided by an embodiment of the present invention includes but is not limited to the following steps:

[0058] Step S11, obtaining operating characteristic information of the high-voltage switch, and obtaining a health indicator of the high-voltage switch according to the operating characteristic information;

[0059] It should be noted that the operating characteristic information includes but is not limited to the opening and closing performance, electrical performance, mechanical performance and monitoring parameters of the high-voltage switch. Specifically, the opening and closing performance includes the opening and closing speed, opening and closing time and synchronous performance, etc. The opening and closing performance of the high-voltage switch directly affects the switching and closing performance of the high-voltage switch; the electrical performance includes the rated voltage, rated current and breaking capacity, etc., which are used to reflect the electrical carrying capacity of the high-voltage switch under normal operation and fault conditions; the mechanical performance includes the wear of the switch, the flexibility of the switch mechanism and the reliability of the transmission components, etc., which are used to reflect the mechanical stability and durability of the high-voltage switch; the monitoring parameters include temperature, vibration, current and voltage, etc., and multiple parameters are obtained to provide data support for the monitoring evaluation of the high-voltage switch. By performing analog-to-digital conversion based on the acquired operating characteristic information, the health index of the high-voltage switch is obtained.

[0060] Step S12, the power distribution terminal controls and detects the high-voltage switch according to the health index to obtain a first input parameter of the high-voltage switch;

[0061] It should be noted that the high-voltage switches are controlled and detected through the distribution terminals, so as to realize the detection of the health indicators of all high-voltage switches. The distribution terminals perform real-time detection of the operating status of the high-voltage switches according to the health indicators, so as to obtain the real-time status information of the high-voltage switches. The multiple real-time status information obtained are used as the first input parameter for the subsequent construction of the health assessment algorithm, so that the distribution network system can evaluate the status of the high-voltage switches in real time.

[0062] Step S13, constructing a health evaluation algorithm for the high-voltage switch, inputting the first input parameter into the health evaluation algorithm, and counting multiple operating curves of the high-voltage switch, and calculating multiple attenuation coefficients of the high-voltage switch according to the multiple operating curves;

[0063] It should be noted that multiple attenuation coefficients are calculated based on multiple operating curves to achieve a comprehensive assessment of the high-voltage switch status. Each attenuation coefficient corresponds to a specific assessment dimension of the high-voltage switch, so that relevant personnel can more accurately understand the health status of the high-voltage switch. Furthermore, based on the specific value of the attenuation coefficient, a more accurate maintenance plan can be formulated. For attenuation coefficients with faster attenuation, maintenance and replacement are given priority, thereby extending the overall service life of the high-voltage switch.

[0064] Step S14, calculating multiple health indicators of the high-voltage switch according to the multiple attenuation coefficients, and obtaining the initial health of the high-voltage switch;

[0065] By monitoring and calculating the health index, an early warning is issued before the high-voltage switch fails, and a scientific maintenance plan is specified according to the changes in the health index. The failure of the high-voltage switch is confirmed in time, thereby improving the reliability and stability of the high-voltage switch.

[0066] Step S15, calculating the difference between the initial health and multiple health indicators to obtain the real-time health of the high-voltage switch.

[0067] It should be noted that through the comprehensive calculation of multiple attenuation coefficients, a multi-dimensional and all-round evaluation of the high-voltage switch can be achieved, and the abnormal state and potential faults of the high-voltage switch can be discovered immediately by calculating the real-time health of the high-voltage switch. Furthermore, the operation and maintenance personnel can specify reasonable maintenance strategies based on the real-time health, and specify preventive maintenance plans in advance for high-voltage switches with low real-time health, thereby extending the service life of the high-voltage switch and improving the overall reliability of the power system.

[0068] It should be noted that this embodiment extracts the health index of the high-voltage switch based on the operation control characteristics of the high-voltage switch, monitors the operation status of the high-voltage switch in real time, obtains the attenuation coefficient of the high-voltage switch through the constructed health evaluation algorithm, and calculates the real-time health of the high-voltage switch based on the attenuation coefficient, thereby realizing effective load disconnection and isolation of the high-voltage switch and avoiding further expansion of the high-voltage switch when an electric power accident occurs.

[0069] In addition, in one embodiment, referring to Figure 2 ,exist Figure 1 Step S12 of the illustrated embodiment also includes but is not limited to the following steps:

[0070] Step S21, obtaining a first time when the power distribution terminal sends a first signal, and a second time when the high-voltage switch completes an opening or closing action according to the first time, and calculating an action time of the high-voltage switch according to the first time and the second time;

[0071] Step S22, obtaining a first time integral of the operating voltage of the high-voltage switch and a second time integral of the operating current of the high-voltage switch, and calculating the energy consumption of the high-voltage switch according to the first time integral and the second time integral;

[0072] Step S23, obtaining a first energy storage signal and a second energy storage signal of the high-voltage switch, and calculating the energy storage charging completion time of the high-voltage switch according to the first energy storage signal and the second energy storage signal, wherein the first energy storage signal is the closing time after the high-voltage switch completes the current closing, and the second energy storage signal is the closing time after the high-voltage switch completes the next closing;

[0073] Step S24, obtaining the working voltage and working current of the energy storage circuit of the high-voltage switch, obtaining the third time integral of the working voltage and the second time integral of the working current, and calculating the energy storage charging energy of the energy storage circuit according to the first time integral and the second time integral;

[0074] Step S25, obtaining the three-phase terminal temperature of the high-voltage switch and the ambient temperature, and calculating the closing contact temperature rise of the high-voltage switch according to the three-phase terminal temperature and the ambient temperature.

[0075] It should be noted that the distribution terminal sends out a first signal (closing control signal) and a second signal (opening signal) to control the opening and closing of the high-voltage switch, and the distribution terminal simultaneously collects the first switching quantity and the second switching quantity of the closing state and the opening state of the high-voltage switch. The distribution terminal automatically records the first time of issuing the closing (or opening) and the second time of the high-voltage switch completing the closing (or opening), and calculates the opening action time and the closing action time according to the following formula:

[0076] tf(th) = t2 - t1;

[0077] Among them, tf is the opening action time, and th is the closing action time.

[0078] The distribution terminal collects the DC voltage and DC current of the control circuit of the high-voltage switch. During the time period of issuing the opening (closing) signal (t1 indicates the time when the signal is issued, and t2 indicates the time when the signal returns), the energy consumption of the opening (ef) and the energy consumption of the closing (eh) are calculated according to the following formula:

[0079] ef(eh) = ;

[0080] Where Uk is the DC voltage, Ik is the DC current, The time for signaling, is the signal return time, ef is the opening energy consumption, and eh is the closing energy consumption.

[0081] The power distribution terminal collects the first energy storage signal (energy stored switch input) of the high-voltage switch and monitors the energy storage voltage at the same time. When the energy storage voltage is not 0 and the second energy storage signal (energy stored signal) changes from closed to open, it is marked as time t1. When the energy stored signal changes from open to closed, it is marked as time t2. The energy storage charging completion time ts is calculated according to the following formula:

[0082] ts = t2 - t1;

[0083] Wherein, ts is the charging completion time, t1 is the marking time of the first energy storage signal, and t2 is the marking time of the second energy storage signal.

[0084] The power distribution terminal collects the stored energy switch input of the high-voltage switch, and monitors the energy storage voltage and the working current at the same time. When the energy storage voltage is not 0 and the stored energy signal changes from closed to open, it is marked as the third time t3. When the stored energy signal changes from open to closed, it is marked as the fourth time t4. The energy storage charging energy is calculated according to the following formula:

[0085] es = ;

[0086] Among them, Us is the energy storage voltage, the working current is Is, and the energy storage charging energy is es.

[0087] The contact temperature rise of the high-voltage switch is calculated based on the three-phase terminal temperature and the ambient temperature, which can be expressed by the following formula:

[0088] Tj=MAX(Tja,Tjb,Tjc) - Te;

[0089] Among them, the temperature of phase A is Tja, the temperature of phase B is Tjb, the temperature of phase C is Tjc, and the ambient temperature is Te.

[0090] In addition, in one embodiment, referring to Figure 3 ,exist Figure 1 Step S14 of the illustrated embodiment also includes but is not limited to the following steps:

[0091] Step S31, obtaining the initial health, service life, switch breaking times life attenuation coefficient, annual inspection life attenuation coefficient, opening and closing action time attenuation coefficient, opening and closing energy attenuation coefficient, energy storage charging completion time attenuation coefficient, energy storage charging energy attenuation coefficient, and switch contact temperature rise attenuation coefficient of the high-voltage switch;

[0092] Step S32, calculate the real-time health of the high-voltage switch according to the initial health, service life, life attenuation coefficient of switch breaking times, life attenuation coefficient of annual inspection, opening and closing action time attenuation coefficient, opening and closing energy attenuation coefficient, energy storage charging completion time attenuation coefficient, energy storage charging energy attenuation coefficient, and switch contact temperature rise attenuation coefficient.

[0093] It should be noted that the rated life parameters of the high-voltage switch are pre-set, such as the commissioning time of the high-voltage switch, the number of interruptions allowed at the rated current, the rated life and rated current of the high-voltage switch;

[0094] Furthermore, in the initial case, the health of the high-voltage switch is 100%. During the use of the high-voltage switch, with the age, the number of closing and opening times, the number of fault interruptions and the attenuation of component performance, the health of the high-voltage switch will continue to decline. The specific attenuation coefficient is as follows:

[0095]

[0096] Going further, the real-time health status of the high-voltage switch SOH = 100% - Ka - Kb - Kc - Kd - Ke -Kf - Kg.

[0097] By comprehensively considering multiple attenuation coefficients, the current health status of the high-voltage switch can be more comprehensively reflected, avoiding the one-sidedness caused by a single indicator. Based on the real-time health assessment results, maintenance plans can be formulated more accurately to avoid excessive maintenance or ignoring potential problems.

[0098] In addition, in one embodiment, referring to Figure 4 ,exist Figure 1 After step S15 in the illustrated embodiment, the following steps are also included but not limited to:

[0099] Step S41, determining the attenuation range of multiple attenuation coefficients;

[0100] Step S42, constructing a first-level warning interval, a second-level warning interval, and a third-level warning interval that decrease in stages according to the multiple attenuation ranges;

[0101] Step S43, setting the first-level warning delay of the first-level warning interval, the second-level warning delay of the second-level warning interval, and the third-level warning delay of the third-level warning interval.

[0102] It should be noted that by determining the attenuation range of multiple attenuation coefficients, and different attenuation ranges correspond to different health states of corresponding indicators of the high-voltage switch, the maintenance plan of the high-voltage switch is determined. The first, second, and third warning intervals correspond to different degrees of health decline, respectively, allowing operation and maintenance personnel to take corresponding emergency measures according to the warning level, and through delayed observation, confirm whether the trend of declining health of the high-voltage switch continues, thereby making a more accurate judgment on the safety level of the high-voltage switch.

[0103] The parameters of the multiple warning intervals and warning delays of this embodiment are as follows:

[0104]

[0105] In addition, in one embodiment, referring to Figure 5 ,exist Figure 4 After step S43 in the illustrated embodiment, the following steps are also included but not limited to:

[0106] Step S51, when the multiple attenuation ranges are not within the first warning interval, the second warning interval and the third warning interval, generating warning information;

[0107] Step S52: the power distribution master station issues an alarm based on the early warning information.

[0108] It should be noted that the traditional early warning system may trigger an alarm only when one or some parameters clearly enter the preset early warning interval. However, in this embodiment, although multiple attenuation ranges do not fall directly into these intervals, when they show abnormal trends or approach critical points, early warning information will be generated in advance to attract attention earlier, thereby enhancing the sensitivity of the power distribution system. In addition, in special circumstances, the degradation of high-voltage switch performance may not occur suddenly, but gradually accumulate. By monitoring the changing trends of multiple attenuation ranges and issuing warnings before they directly trigger the early warning interval, it can help operation and maintenance personnel identify and prevent potential risks in advance and avoid the occurrence of failures.

[0109] It should be noted that the traditional operation and maintenance mode warning is often a passive response type, that is, after the high voltage fails, an alarm signal is sent to notify the operation and maintenance personnel to carry out maintenance. In this embodiment, by generating early warning information in advance, the operation and maintenance mode of the high-voltage switch can be promoted to an active prevention mode. The operation and maintenance personnel can intervene in advance based on the early warning information and take measures to prevent the equipment performance from further deteriorating, thereby improving the overall reliability and stability of the high-voltage switch.

[0110] In addition, in one embodiment, referring to Figure 6 ,exist Figure 1 Step S13 of the illustrated embodiment also includes but is not limited to the following steps:

[0111] Step S61, obtaining multiple rated current intervals, equivalent times, actual occurrence times and equivalent attenuation times of the breaking current of the high-voltage switch, and calculating the switch breaking times life attenuation coefficient of the segmented current according to the rated current intervals, equivalent times, actual occurrence times and equivalent attenuation times;

[0112] Step S62, obtaining the ambient temperature, time coefficient, actual use time and equivalent attenuation times of the high-voltage switch, and calculating the service life attenuation times of the high-voltage switch according to the ambient temperature, time temperature, actual use time and equivalent attenuation times;

[0113] Step S63, obtaining the opening action time and closing action time of the high-voltage switch, calculating a first operation curve of the high-voltage switch according to the opening action time and the closing action time, and calculating the opening and closing action time attenuation coefficient according to the first operation curve;

[0114] Step S64, obtaining the opening energy consumption value and the closing energy consumption value of the high-voltage switch, calculating the second operation curve of the high-voltage switch according to the opening energy consumption value and the closing energy consumption value, and calculating the opening and closing energy attenuation coefficient according to the second operation curve;

[0115] Step S65, obtaining the energy storage charging completion time of the high-voltage switch, calculating the third operation curve of the high-voltage switch according to the energy storage charging completion time, and calculating the energy storage charging completion time attenuation coefficient according to the third operation curve;

[0116] Step S66, obtaining the energy value of the energy storage charging of the high-voltage switch, calculating the fourth operation curve of the high-voltage switch according to the energy storage charging energy value, and calculating the energy storage charging energy value attenuation coefficient according to the fourth operation curve;

[0117] Step S67, obtaining a temperature operation curve and a plurality of temperature intervals of the switch contact, and calculating a temperature rise attenuation coefficient of the switch contact according to the temperature operation curve and the plurality of temperature intervals.

[0118] It should be noted that the breaking times of different breaking currents of the high-voltage switch are counted and weighted calculation is performed, and the life attenuation coefficient of the breaking times of the high-voltage switch is statistically calculated in the following equivalent manner:

[0119]

[0120] Calculate the switch breaking times life attenuation coefficient according to the following formula:

[0121] Ka = (N1+2N2+4N3+8N4+16N5+32N6+64N7) / Nn*100%;

[0122] Among them, Ka is the life attenuation coefficient of the switch breaking times.

[0123] For example: Nn=10000 times, N1+2N2+4N3+8N4+16N5+32N6+64N7=2000 times, then Ka=20%, indicating a 20% reduction in lifespan.

[0124] Based on the years of use and the degree of deviation of the ambient temperature from normal temperature, a weighted calculation is performed and statistical calculation is performed in the following equivalent manner:

[0125]

[0126] The service life attenuation coefficient is calculated according to the following formula:

[0127] Kb = (1.6t1+1.4t2+1.2t3+t4+1.2t5+1.4t6+1.6t7) / Tn*100%;

[0128] Where Kb is the number of times the service life decays.

[0129] For example:

[0130] Tn=10 years, 1.6t1+1.4t2+1.2t3+t4+1.2t5+1.4t6+1.6t7=4 years, then Kb=40%, indicating a 40% reduction in lifespan.

[0131] The total duration of the opening and closing actions is calculated by summing the opening and closing action time. The total duration of the opening and closing actions is counted as the first operation curve. The life of the first operation curve decreases by 5% when it is extended by 10%.

[0132] For example:

[0133] When the circuit breaker is just put into use, the total duration of the opening and closing action is 30ms.

[0134] When the total duration of the opening and closing action reaches 30*1.1=33ms, the attenuation coefficient Kc=5%;

[0135] When the total duration of the opening and closing action reaches 33*1.1=36.3ms, the attenuation coefficient Kc=10%;

[0136] When the total duration of the opening and closing action reaches 36.3*1.1=39.9ms, the attenuation coefficient Kc=15%;

[0137] When the total duration of the opening and closing action reaches 30*(1.1)nms, the attenuation coefficient Kc=n*5%.

[0138] The energy consumption value of opening and closing is summed to obtain the total energy consumption value of opening and closing, and the total energy value of opening and closing is counted as the second operation curve. The life of the second operation curve decreases by 5% when it is extended by 10%;

[0139] For example:

[0140] The total energy consumption of opening and closing is 100ws when it is just put into use.

[0141] When the total energy consumption of opening and closing reaches 100*1.1=110ws, the attenuation coefficient Kd=5%;

[0142] When the total energy consumption of opening and closing reaches 110*1.1=121ms, the attenuation coefficient Kd=10%;

[0143] When the total energy consumption of opening and closing reaches 121*1.1=133.1ms, the attenuation coefficient Kd=15%;

[0144] When the total energy consumption of opening and closing reaches 100*(1.1)nws, the attenuation coefficient Kd=n*5%.

[0145] The energy storage charging completion time is calculated as the third operating curve. For every 10% extension of the third operating curve, the lifespan decreases by 5%.

[0146] For example:

[0147] When the energy storage charging is just put into use, the value is 10s.

[0148] When the energy storage charging completion time reaches 10*1.1=11s, the attenuation coefficient ke=5%;

[0149] When the energy storage charging completion time reaches 11*1.1=12.1s, the attenuation coefficient ke=10%;

[0150] When the energy storage charging completion time reaches 10*(1.1)nms, the attenuation coefficient ke=n*5%;

[0151] The energy storage charging energy is counted as the fourth operating curve. For every 10% extension of efh, the lifespan decreases by 5%.

[0152] For example:

[0153] When the energy storage charging energy is just put into use, the value is = 200ws.

[0154] When the energy storage charging energy reaches 200*1.1=220ws, the attenuation coefficient kf=5%;

[0155] When the energy storage charging energy reaches 220*1.1=242ms, the attenuation coefficient kf=10%;

[0156] When the energy storage charging energy reaches 200*(1.1)nws, the attenuation coefficient kf=n*5%.

[0157] The temperature rise operating curve of the switch contact is calculated. When the switch contact temperature rises relative to the ambient temperature, the attenuation coefficient kg is calculated according to the following table:

[0158]

[0159] In addition, in one embodiment, referring to Figure 7 ,exist Figure 2 Step S25 of the illustrated embodiment also includes but is not limited to the following steps:

[0160] Step S71, a temperature measuring ring is placed on the three-phase voltage terminal of the high-voltage switch, and the temperature measuring ring collects the temperature of the three-phase terminal and the ambient temperature of the three-phase voltage terminal;

[0161] Step S72, connecting a temperature receiving device to the power distribution terminal, and the temperature receiving device is communicatively connected to the temperature measuring loop;

[0162] Step S73, determining the communication frequency band between the temperature measuring ring and the temperature receiving device, so that the power distribution terminal obtains the three-phase terminal temperature and the ambient temperature.

[0163] It should be noted that the temperature measuring ring collects the temperature of the three-phase terminal and the ambient temperature in real time, and the distribution terminal can obtain these data immediately and process and analyze them. Once the high-voltage switch has an abnormal temperature, the distribution terminal can immediately issue an early warning signal to remind the staff to take timely measures to prevent failures or accidents caused by overheating of the equipment. Furthermore, the application of wireless communication technology makes the data transmission between the temperature measuring ring and the temperature receiving device more flexible and convenient. At the same time, by adopting a high-sensitivity design and excellent anti-interference ability, the stability and security of data transmission can be ensured.

[0164] In this embodiment, a miniature wireless temperature measuring ring for self-powering current is installed on the three-phase voltage terminal of the high-voltage switch to collect the terminal post temperature and ambient temperature of the three-phase circuit. A wireless temperature receiving box for serial communication is connected to the power distribution terminal. The wireless receiving box and the miniature wireless temperature measuring ring communicate wirelessly through the frequency band of 2.4GHz or 433MHz, thereby collecting the three-phase temperature and ambient temperature.

[0165] like Figure 8 As shown, Figure 8 : is a structural diagram of a high-voltage switch health assessment device provided by an embodiment of the present invention. The present invention also provides a high-voltage switch health assessment device, comprising:

[0166] The processor 801 may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0167] The memory 802 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 802 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 802, and the processor 801 calls and executes the high-voltage switch health assessment method of the embodiment of this application;

[0168] Input / output interface 803, used to implement information input and output;

[0169] The communication interface 804 is used to realize the communication interaction between the present apparatus and other devices. The communication can be realized through a wired manner (such as USB, network cable, etc.) or a wireless manner (such as mobile network, WIFI, Bluetooth, etc.);

[0170] A bus 805 that transmits information between various components of the device (e.g., the processor 801, the memory 802, the input / output interface 803, and the communication interface 804);

[0171] The processor 801 , the memory 802 , the input / output interface 803 and the communication interface 804 are connected to each other in communication within the device via a bus 805 .

[0172] An embodiment of the present application also provides an electronic device, comprising the high-voltage switch health assessment device as described above.

[0173] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the above-mentioned high-voltage switch health assessment method is implemented.

[0174] As a non-transient computer-readable storage medium, the memory can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are implemented to be located in one place, or may also be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0175] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0176] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A method for evaluating the health of a high-voltage switch, characterized in that: include: Acquiring operating characteristic information of the high-voltage switch, and obtaining a health indicator of the high-voltage switch according to the operating characteristic information; The power distribution terminal controls and detects the high-voltage switch according to the health index to obtain multiple real-time status information of the high-voltage switch, and obtains a first input parameter of the high-voltage switch according to the multiple real-time status information, including obtaining a first time when the power distribution terminal sends a first signal, and a second time when the high-voltage switch completes an opening or closing action according to the first signal, and calculating an action time of the high-voltage switch according to the first time and the second time; Obtaining a first time integral of an operating voltage of the high-voltage switch within the action time and a second time integral of an operating current, and calculating energy consumption of the high-voltage switch according to the first time integral and the second time integral; Acquire a first energy storage signal and a second energy storage signal of the high-voltage switch, and calculate the energy storage charging completion time of the high-voltage switch according to the first energy storage signal and the second energy storage signal, wherein the first energy storage signal is the closing time after the high-voltage switch completes the current closing, and the second energy storage signal is the closing time after the high-voltage switch completes the next closing; Obtaining the working voltage and working current of the energy storage circuit of the high-voltage switch, obtaining the third time integral of the working voltage of the energy storage circuit and the fourth time integral of the working current, calculating the energy storage charging energy of the energy storage circuit according to the third time integral and the fourth time integral, when the working voltage of the energy storage circuit is not zero and the energy stored signal changes from closed to open, it is marked as the third time T3, when the energy stored signal changes from open to closed, it is marked as the fourth time T4, and the time interval of the third time integral and the fourth time integral is T3 to T4; Acquiring the three-phase terminal temperature and the ambient temperature of the high-voltage switch, and calculating the closing contact temperature rise of the high-voltage switch according to the difference between the three-phase terminal temperature and the ambient temperature; Constructing a health assessment algorithm for the high-voltage switch, inputting the first input parameter into the health assessment algorithm, and counting a plurality of operating curves of the high-voltage switch, and calculating a plurality of attenuation coefficients of the high-voltage switch according to the plurality of operating curves, including obtaining a plurality of rated current intervals, equivalent breaking times, actual breaking times, and equivalent attenuation times of the breaking current of the high-voltage switch, obtaining the equivalent attenuation times according to the product of the equivalent breaking times corresponding to the plurality of rated current intervals and the actual breaking times, summing the equivalent attenuation times corresponding to the plurality of rated current intervals, and using the percentage of the sum and the breaking times Nn as the breaking times life attenuation coefficient; Obtaining the time coefficient and the actual use time corresponding to the high-voltage switch in multiple ambient temperature intervals, obtaining the equivalent attenuation times corresponding to the multiple ambient temperature intervals according to the product of the time coefficient and the actual use time, summing the equivalent attenuation times corresponding to the multiple ambient temperature intervals, and using the sum of the equivalent attenuation times and the percentage of the life span Tn as the service life attenuation coefficient; Obtaining the opening action time and closing action time of the high-voltage switch, summing the opening action time and closing action time to obtain a total time as a first operation curve of the high-voltage switch, and calculating the opening and closing action time attenuation coefficient according to the first operation curve, including taking the total opening and closing time of the high-voltage switch when it is just put into use as a benchmark, and the life of the high-voltage switch is attenuated by 5% for every 10% extension of the curve; Obtaining the opening energy consumption value and closing energy consumption value of the high-voltage switch, summing the opening energy consumption value and the closing energy consumption value to obtain a total opening and closing energy consumption value as a second operation curve of the high-voltage switch, and calculating the opening and closing energy attenuation coefficient according to the second operation curve, including that the high-voltage switch is based on the total opening and closing energy consumption value when it is just put into use, and the life of the curve is attenuated by 5% for every 10% extension; Obtaining the energy storage charging completion time of the high-voltage switch, calculating a third operation curve of the high-voltage switch according to the energy storage charging completion time, and calculating an energy storage charging completion time attenuation coefficient according to the third operation curve, including that the high-voltage switch takes the energy storage charging completion time when it is just put into use as a benchmark, and the life of the curve is attenuated by 5% for every 10% extension; Obtaining the energy storage charging energy value of the high-voltage switch, calculating a fourth operation curve of the high-voltage switch according to the energy storage charging energy value, and calculating the energy storage charging energy value attenuation coefficient according to the fourth operation curve, including that the high-voltage switch is based on the energy storage charging energy value when it is just put into use, and the life of the curve is attenuated by 5% for every 10% extension; Obtaining a temperature rise operation curve and multiple temperature intervals of the closing contact of the high-voltage switch, and calculating a temperature rise attenuation coefficient of the switch contact according to the temperature rise operation curve and the multiple temperature intervals, when the temperature rise is less than 40°C, the temperature rise attenuation coefficient of the switch contact is 0%, when the temperature rise is greater than or equal to 40°C and less than 60°C, the temperature rise attenuation coefficient of the switch contact is 20%, when the temperature rise is greater than or equal to 60°C and less than 80°C, the temperature rise attenuation coefficient of the switch contact is 40%, when the temperature rise is greater than or equal to 80°C and less than 100°C, the temperature rise attenuation coefficient of the switch contact is 60%, when the temperature rise is greater than or equal to 100°C and less than 150°C, the temperature rise attenuation coefficient of the switch contact is 80%, and when the temperature rise is greater than or equal to 150°C, the temperature rise attenuation coefficient of the switch contact is 100%; Calculating a plurality of health indicators of the high-voltage switch according to the plurality of attenuation coefficients, and acquiring an initial health indicator of the high-voltage switch; The difference between the initial health and the plurality of health indicators is calculated to obtain the real-time health of the high-voltage switch.

2. The high-voltage switch health assessment method according to claim 1, characterized in that: Calculating the real-time health of the high-voltage switch according to the plurality of attenuation coefficients includes: Obtaining the initial health of the high-voltage switch, the life attenuation coefficient of the number of switch breaking times, the life attenuation coefficient of the service life, the attenuation coefficient of the opening and closing action time, the attenuation coefficient of the opening and closing energy, the attenuation coefficient of the energy storage charging completion time, the attenuation coefficient of the energy storage charging energy value, and the attenuation coefficient of the switch contact temperature rise; The real-time health of the high-voltage switch is calculated based on the initial health, the life attenuation coefficient of the switch disconnection times, the service life attenuation coefficient, the opening and closing action time attenuation coefficient, the opening and closing energy attenuation coefficient, the energy storage charging completion time attenuation coefficient, the energy storage charging energy value attenuation coefficient, and the switch contact temperature rise attenuation coefficient.

3. The high voltage switch health assessment method according to claim 1, characterized in that: After obtaining the real-time health of the high-voltage switch, the method further includes: determining an attenuation range of a plurality of said attenuation coefficients; According to the plurality of attenuation ranges, a first-level warning interval, a second-level warning interval and a third-level warning interval are constructed, which decrease in stages; A first-level warning delay for the first-level warning interval, a second-level warning delay for the second-level warning interval, and a third-level warning delay for the third-level warning interval are set.

4. The high-voltage switch health assessment method according to claim 3, characterized in that: After setting the first-level warning delay of the first-level warning interval, the second-level warning delay of the second-level warning interval, and the third-level warning delay of the third-level warning interval, the method further includes: When the plurality of attenuation ranges are not within the first-level warning interval, the second-level warning interval, and the third-level warning interval, but show an abnormal trend or are close to a critical point, a warning message is generated; The power distribution master station issues an alarm based on the early warning information.

5. The high voltage switch health assessment method according to claim 1, characterized in that: The step of calculating the closing contact temperature rise of the high-voltage switch according to the difference between the three-phase terminal temperature and the ambient temperature comprises: A temperature measuring ring is placed on the three-phase voltage terminal of the high-voltage switch, and the temperature measuring ring collects the temperature of the three-phase terminal posts and the ambient temperature of the three-phase voltage terminal; A temperature receiving device is connected to the power distribution terminal, and the temperature receiving device is communicatively connected to the temperature measuring ring; The communication frequency band between the temperature measuring ring and the temperature receiving device is determined so that the power distribution terminal can obtain the temperature of the three-phase terminal and the ambient temperature.

6. A high voltage switch health assessment device, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the high-voltage switch health assessment method as described in any one of claims 1 to 5.

7. An electronic device, characterized in that: It includes the high-voltage switch health assessment device as described in claim 6.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the high-voltage switch health assessment method according to any one of claims 1 to 5.

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