CN115526137B - Simulation verification method for disconnecting link switch operation ticket - Google Patents
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Abstract
The invention relates to the technical field of operation tickets, and discloses a simulation verification method for a disconnecting link switch operation ticket, which comprises the steps of obtaining basic information corresponding to all equipment of a transformer substation, carrying out simulation modeling based on the topological relation and the basic information of all the equipment of the transformer substation, utilizing equivalent capacitance, equivalent resistance or equivalent inductance to carry out equivalence on a disconnecting link switch node, a load node and a power supply node, identifying the load node with positive correlation synchronization relation in each disconnecting link switch node according to a preset trend rule, utilizing the equivalent resistance to carry out equivalence on all the load nodes with positive correlation synchronization relation, carrying out simulation rehearsal of each link in an equipment electrical simulation circuit according to an operation instruction, obtaining the instantaneous current variation of the corresponding equivalent resistance, and judging whether the instantaneous current variation meets the preset instantaneous current expected range, thereby completing verification on the disconnecting link switch operation ticket and improving the accuracy of an operation verification result.
Description
Technical Field
The invention relates to the technical field of operation tickets, in particular to a simulation verification method for a disconnecting link switch operation ticket.
Background
At present, the disconnecting link operation tickets of the transformer substation can be generally divided into three types: checking, operating and switching. The inspection is a dynamic process for inspecting the equipment, and includes inspection of relevant states of the equipment (besides the switch position, meters, lights and the like need to be inspected). For example: the position of equipment and the load operation change condition need to be checked by pulling and closing equipment (a circuit breaker, a disconnecting switch, a grounding disconnecting link and the like); the operation means that the power transmission and shutdown sequence must be met, and generally, the power transmission side is firstly carried out, and then the power transmission side is carried out; the switching means switching a switch or a breaker on or off according to a rule to complete equipment outage such as power transmission and circuit breaking.
For the disconnecting link operation ticket, in the prior art, after the disconnecting link operation ticket is generated, in the process of performing anti-misoperation verification on the operation ticket, the operation ticket is difficult to characterize the load operation change, so that the operation verification result is not accurate, and finally, when the generated operation ticket is executed, the operation ticket does not reach the expected effect, and the reliability of the operation of a power grid is influenced.
Disclosure of Invention
The invention provides a simulation verification method for a disconnecting link switch operation ticket, which solves the technical problem of inaccurate verification of the disconnecting link switch operation ticket.
In view of this, the first aspect of the present invention provides a simulation verification method for a knife switch operation ticket, including the following steps:
s1, obtaining basic information corresponding to all equipment of a transformer substation, wherein the basic information comprises an equipment number, an equipment name, an equipment type and an equipment electrical parameter;
s2, carrying out simulation modeling based on the topological relations and basic information of all equipment of the transformer substation to obtain an equipment simulation model;
s3, obtaining equipment node types in the equipment simulation model, wherein the equipment node types comprise a disconnecting link switch node, a load node and a power supply node, identifying the opening and closing state of the disconnecting link switch node, enabling the disconnecting link switch node with the opening and closing state to be equivalent to a first equivalent resistor, enabling the disconnecting link switch node with the opening and closing state to be equivalent to an equivalent inductor, enabling the load node to be equivalent to a second equivalent resistor, and enabling the power supply node to be equivalent to an equivalent capacitor, so that the equipment simulation model is converted into an equipment electrical simulation circuit;
s4, traversing each switch node in the electrical simulation circuit of the equipment, identifying the load node of each switch node with positive correlation synchronization relationship according to a preset power flow rule, and carrying out equivalence on all load nodes with positive correlation synchronization relationship by using a third equivalent resistor;
s5, analyzing an operation task in the maintenance plan, generating an operation ticket, identifying an operation instruction in the operation ticket, and performing simulation rehearsal of each link in the equipment electrical simulation circuit according to the operation instruction;
s6, performing displacement operation on the disconnecting link switch node according to the operation instruction to obtain the instantaneous current variable quantity of the corresponding third equivalent resistor;
and S7, judging whether the instantaneous current variation meets a preset instantaneous current expected range or not, if the instantaneous current variation meets the preset instantaneous current expected range, checking the link corresponding to the operation ticket to pass, executing the displacement operation of the disconnecting link switch node of the next link according to the step S6, if the instantaneous current variation does not meet the preset expected range, checking the operation ticket to fail, and returning to the step S5 until all links in the operation ticket are checked to pass.
Preferably, step S4 specifically includes:
s401, starting from the power supply node in the electrical simulation circuit of the equipment, traversing each disconnecting link switch node along the feeder line direction, applying different excitation currents to the disconnecting link switch nodes in the same step length, wherein the time sequence of the formed excitation currents is recorded as,
in the formula (I), the compound is shown in the specification,
indicates the w-th knife switch node, is>
Represents the excitation current at the ith time of the w-th disconnecting-link switching node>
Represents the excitation current at time t of the w-th knife switch node, t represents the total time,
；
s402, performing topology analysis on the disconnecting link switch node based on a reference power flow direction to obtain all controlled load nodes, wherein the reference power flow direction is a current direction between the power supply node and the disconnecting link switch node;
s403, acquiring current values of all controlled load nodes and recording the current values,
in the formula (I), the compound is shown in the specification,
represents the current of the mth load node>
Represents the current at the ith time of the mth load node;
represents the current at time t of the mth load node;
s404, calculating the current phase difference of the corresponding controlled load node according to the following formula:
in the formula (I), the compound is shown in the specification,
a second peak current, representing an mth controlled load node>
Represents the first peak current, which represents the mth controlled load node>
Representing the current phase difference of the mth controlled load node;
s405, screening out controlled load nodes with current phase difference larger than 0 as positive correlation load nodes, and calculating the positive correlation synchronization indexes of the positive correlation load nodes as follows:
wherein Z represents a positive correlation synchronization fingerThe target is a number of items,
represents the difference between the current at the i-th time and the current at the i-1 th time of the mth load node, and/or>
Represents the difference between the current at the i-th instant of the mth controlled load node and the current at the i-1 th instant, and/or>
Represents a line impedance influencing factor, wherein>
Represents the line voltage from the switch node of the knife switch to the load node, R represents the line resistance, X represents the reactance value of the line, L represents the length of the line from the knuckle to the load node, and/or>
Representing the time interval, d representing the differential sign;
s406, screening out load nodes with positive correlation synchronization indexes larger than a preset index threshold value as corresponding disconnecting link switch nodes with positive correlation synchronization relations, and recording as M w,1 ,M w,2 ,M w,3 ,...,M w,v Wherein M is w,v The load node represents that the nth and the w-th disconnecting link switch nodes have positive correlation synchronization relation;
s407, constructing parallel resistance circuits by using second equivalent resistors respectively corresponding to all load nodes having positive correlation synchronization relationship with the w-th disconnecting link switching node, calculating the parallel resistance value of the parallel resistance circuit to be used as a third equivalent resistor, and performing equivalence on all load nodes having positive correlation synchronization relationship with the w-th disconnecting link switching node by using the third equivalent resistor.
Preferably, step S5 specifically includes:
s501, obtaining an operation task in the maintenance plan, performing word segmentation on the operation task to obtain a plurality of words, and sequencing all the words according to the word segmentation sequence to obtain a word sequence;
s502, segmenting the word sequence according to a preset starting character and a preset ending character to obtain a plurality of operation links;
s503, performing part-of-speech tagging on each word in the operation link, and filling the word subjected to the part-of-speech tagging into a preset operation template, wherein the preset operation template comprises operation equipment and a displacement state, the part-of-speech corresponding to the operation equipment is a number, a noun and an adjective, and the part-of-speech corresponding to the displacement state is a verb;
s504, mapping the operating equipment to a two-dimensional interface according to corresponding positions based on a wiring diagram of the transformer substation and the operating equipment in the operating link, and constructing an operating equipment map;
s505, sequencing the operation links according to preset operation logic based on the operating equipment map, and generating operation tickets for the sequenced operation links;
s506, identifying an operation instruction in the operation ticket, wherein the operation instruction comprises an operation link, operation equipment and a deflection state;
and S507, sequentially and sequentially performing simulated preview of each operation link in the electrical simulation circuit of the equipment according to the operation instruction, marking the operation link as previewed when the simulated preview of each operation link passes in the simulated preview process, and performing simulated preview of the next operation link until the simulated preview of the operation link passes.
Preferably, step S505 specifically includes:
performing topology analysis on each operating device based on a wiring diagram of the transformer substation to obtain device nodes associated with the operating devices and the number of the device nodes;
arranging the operating devices in a descending order according to the number of the associated device nodes, thereby determining the initial ordering of the operating links;
and for the operation equipment with the same number of equipment nodes associated with the operation equipment, acquiring the line length between the corresponding operation equipment and the bus, sequencing the corresponding operation equipment according to the line length from short to long, and generating an operation ticket for the sequenced operation links.
Preferably, step S6 specifically includes:
s601, performing displacement operation on the disconnecting link switch node according to the operation instruction, wherein if the displacement operation is that the disconnecting link switch node is switched from closed displacement to open, the equivalent inductance of the corresponding disconnecting link switch node is converted into a first equivalent resistance, and if the displacement operation is that the disconnecting link switch node is switched from open displacement to closed, the equivalent inductance of the corresponding disconnecting link switch node is converted into the equivalent inductance;
and S602, measuring the instantaneous current variation of a third equivalent resistor corresponding to the disconnecting link switch node by using a pulse catcher.
Preferably, step S7 is preceded by:
s71, applying different excitation alternating-current square wave currents to the disconnecting link switch node in the same step length to obtain current actual measurement data of the second equivalent resistor generated by excitation of the excitation alternating-current square wave currents;
s72, deviation value detection is carried out on all current measured data, and the current measured data with the deviation value larger than a preset deviation threshold value are removed to obtain normal current measured data;
s73, performing difference value calculation on the normal current measured data of two adjacent time intervals to obtain a plurality of differential current data;
s74, dividing the differential current data into a plurality of sections according to equal sliding windows, calculating the variance of the differential current data in each section, calculating the mean square error according to the variances to obtain the minimum mean square error and the maximum mean square error, and taking the range between the minimum mean square error and the maximum mean square error as the expected range of the instantaneous current.
Preferably, step S72 specifically includes:
s721, calculating the arithmetic mean difference of all the current measured data;
s722, calculating a deviation value between each current measured data and the arithmetic average difference;
and S723, calculating standard deviations of all the current actual measurement data, judging whether deviation values of the current actual measurement data are more than two times of the standard deviations, and if the deviation values of the current actual measurement data are more than two times of the standard deviations, rejecting the corresponding current actual measurement data to obtain normal current actual measurement data.
Preferably, step S7 is followed by:
if all links in the operation ticket pass the verification, locally storing the operation ticket, adding an operation Identity (ID) to the operation ticket, and uploading the operation ticket to a front-end browser;
and matching the operation identity ID according to the identity ID input in advance through the front-end browser, checking the operation ticket if the matching is successful, and generating matching failure information for early warning if the matching is failed.
In a second aspect, the present invention also provides an electronic device, including: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
the memory has stored therein a computer program which, when executed by the processor, causes the processor to carry out the steps of the above-mentioned method.
In a third aspect, the present invention also provides a computer-readable storage medium storing a computer program executable by an electronic device, the program, when run on the electronic device, causing the electronic device to perform the steps of the above-mentioned method.
According to the technical scheme, the invention has the following advantages:
the method comprises the steps of obtaining basic information corresponding to all equipment of a transformer substation respectively, carrying out simulation modeling based on topological relations and the basic information of all the equipment of the transformer substation to obtain an equipment simulation model, utilizing equivalent capacitance, equivalent resistance or equivalent inductance to carry out equivalence on a disconnecting link switch node, a load node and a power supply node so as to convert the equipment simulation model into an equipment electrical simulation circuit, identifying the load node with positive correlation synchronization relation in each disconnecting link switch node according to a preset power flow rule, utilizing the equivalent resistance to carry out equivalence on all the load nodes with positive correlation synchronization relation, identifying an operation instruction in an operation ticket, carrying out simulation rehearsal of each link in the equipment electrical simulation circuit according to the operation instruction, carrying out deflection operation on the disconnecting link switch node to obtain the instantaneous current variation of the corresponding equivalent resistance, judging whether the instantaneous current variation meets a preset instantaneous current expected range or not, finishing verification on the disconnecting link operation ticket, representing the load operation variation corresponding to the disconnecting link, and improving the accuracy of operation verification results.
Drawings
Fig. 1 is a flowchart of a simulation verification method for a disconnecting link switch operation ticket according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For easy understanding, referring to fig. 1, the method for verifying simulation of the operating ticket of the disconnecting link switch provided by the invention comprises the following steps:
s1, obtaining basic information corresponding to all devices of the transformer substation, wherein the basic information comprises device numbers, device names, device types and device electrical parameters.
It can be understood that the basic information corresponding to all the devices of the substation respectively can be acquired from a CIM model or a device scheduling system of the substation, wherein the device number is unique, and the device electrical parameters include electrical information such as current, voltage, power, resistance, reactance, and the like.
And S2, carrying out simulation modeling based on the topological relations and the basic information of all the equipment of the transformer substation to obtain an equipment simulation model.
Wherein, electronic workbench software or Simulink software can be adopted for simulation modeling, in the modeling process, specific primitives are adopted to represent different equipment types, and corresponding basic information is injected into each equipment.
And S3, obtaining equipment node types in the equipment simulation model, wherein the equipment node types comprise a disconnecting link switch node, a load node and a power supply node, identifying the opening and closing state of the disconnecting link switch node, equating the disconnecting link switch node with the opening and closing state as a first equivalent resistor, equating the disconnecting link switch node with the opening and closing state as a closed equivalent inductor, equating the load node as a second equivalent resistor and equating the power supply node as an equivalent capacitor, and thus converting the equipment simulation model into an equipment electrical simulation circuit.
It can be understood that the device node type in the device simulation model can be obtained based on the basic information of the device, and since the knife switch is verified in this embodiment, the knife switch node, the load node, and the power node associated therewith are determined, and the knife switch node whose on-off state is off is equivalent to a first equivalent resistor, where the resistance value of the first equivalent resistor can be infinitely close to 99999;
and (3) equating the disconnecting link switch node with the closed opening and closing state as equivalent inductance, wherein the equivalent inductance is calculated by the following formula if the conductivity and the impedance corresponding to the material of the disconnecting link switch are required to be obtained:
in the formula, LL represents the inductance value of the equivalent inductor,
represents the conductivity, W represents the impedance, and>
indicates the inflow voltage of the knife switch>
Indicating the knife-switch outflow voltage, I d Representing the current of the knife switch.
And equating the load node to be a second equivalent resistor, wherein the calculation process of the resistance value of the second equivalent resistor comprises the following steps:
the method comprises the steps that the connection relation and the corresponding resistance value of each element inside a load node are obtained, and the connection relation comprises parallel connection and series connection;
calculating the parallel equivalent resistance values of the elements connected in parallel, and calculating the series equivalent resistance value of the load node according to the parallel resistance values and the resistance values of the elements connected in series;
acquiring the total impedance of the micro-grid of the transformer substation and the impedance of each load node, and calculating the resistance value of the second equivalent resistor of each load node according to the following formula:
wherein RR represents the resistance of the second equivalent resistor,
represents the impedance of the load node, and>
represents the total impedance of the microgrid, ->
Representing the resistance of the series equivalent resistor.
The power supply node is equivalent to an equivalent capacitor, and the calculation process of the equivalent capacitor comprises the following steps:
obtaining rated charging capacity of the power supply node and recording as C e ；
The amount of capacitance loss of the power supply node is calculated by the following formula,
in the formula (I), the compound is shown in the specification,
representing a measure of capacitance loss in a power supply node>
Represents the total capacity of the power supply node, and>
represents the maximum load current of the power supply node, and->
Represents the resistance value of the power supply node, and t represents the maximum load loss time;
calculating the current capacitance of the power supply node according to the rated charging capacity and the capacitance loss of the power supply node as follows:
in the formula (I), the compound is shown in the specification,
represents the current capacitance of the power supply node;
and fitting the current capacitance of the power supply node along with the change of the maximum load loss time to obtain a fitting straight line, and determining that the current capacitance of the corresponding power supply node is used as the capacitance value of the equivalent capacitance when the maximum load loss time is 0.
Through the conversion of the equipment simulation model into the equipment electrical simulation circuit, the equipment simulation model is simplified, and the load change is more conveniently represented.
And S4, traversing each switch node in the electrical simulation circuit of the equipment, identifying the load node of each switch node with positive correlation synchronization relation according to a preset power flow rule, and carrying out equivalence on all the load nodes with positive correlation synchronization relation by using a third equivalent resistor.
In the embodiment, load nodes having positive correlation synchronization relationship with the disconnecting link switch nodes are obtained, namely, the load nodes having positive correlation synchronization relationship with the disconnecting link switch nodes are obtained, the positive correlation synchronization relationship is a forward change and synchronization change relationship with the disconnecting link switch nodes, the load nodes having positive correlation synchronization relationship with the disconnecting link switch nodes are taken as representatives, and the second equivalent resistor is used for carrying out equivalence on all load nodes having positive correlation synchronization relationship to highlight the load running state change, so that the accuracy of the disconnecting link operation ticket checking is improved.
And S5, analyzing the operation tasks in the maintenance plan, generating an operation ticket, identifying an operation instruction in the operation ticket, and performing simulation rehearsal of each link in the electrical simulation circuit of the equipment according to the operation instruction.
And S6, carrying out displacement operation on the disconnecting link switch node according to the operation instruction, and obtaining the instantaneous current variable quantity of the corresponding third equivalent resistor.
It can be understood that, in order to improve the efficiency of the verification, only the instantaneous current variation of the third equivalent resistor is obtained, and since the instantaneous current variation is in an instantaneous state, the instantaneous current variation has real-time performance, and meanwhile, the instantaneous current variation can be obtained at the first time.
And S7, judging whether the instantaneous current variation meets a preset instantaneous current expected range or not, if the instantaneous current variation meets the preset instantaneous current expected range, checking that the link corresponding to the operation ticket passes, executing the displacement operation of the disconnecting link switch node of the next link according to the step S6, if the instantaneous current variation does not meet the preset expected range, checking that the operation ticket does not pass, and returning to the step S5 until all links in the operation ticket pass.
The embodiment provides a simulation verification method for a disconnecting link switch operation ticket, which includes the steps of obtaining basic information corresponding to all equipment of a transformer substation respectively, carrying out simulation modeling based on topological relations and the basic information of all the equipment of the transformer substation to obtain an equipment simulation model, utilizing equivalent capacitance, equivalent resistance or equivalent inductance to enable disconnecting link switch nodes, load nodes and power supply nodes to be equivalent, converting the equipment simulation model into an equipment electrical simulation circuit, identifying the load nodes with positive correlation synchronization relation in each disconnecting link switch node according to a preset power flow rule, utilizing the equivalent resistance to carry out equivalence on all the load nodes with positive correlation synchronization relation, identifying an operation instruction in the operation ticket, carrying out simulation rehearsal of each link in the equipment electrical simulation circuit according to the operation instruction, carrying out deflection operation on the disconnecting link switch node, obtaining the instantaneous current variable quantity of a second equivalent resistance corresponding to the disconnecting link switch node, judging whether the instantaneous current variable quantity meets a preset instantaneous current expected range or not, and finishing verification on the disconnecting link switch operation ticket, thereby representing the load operation change corresponding to the disconnecting link switch and improving the accuracy of operation verification results.
In a specific embodiment, step S4 specifically includes:
s401, starting from a power supply node in the electrical simulation circuit of the equipment, traversing each disconnecting link switch node along the feeder line direction, applying different excitation currents to the disconnecting link switch nodes in the same step length, wherein the time sequence of the formed excitation currents is recorded as,
in the formula (I), the compound is shown in the specification,
indicates the w-th knife switch node, is>
Represents the excitation current at the ith time of the w-th disconnecting link switching node>
Represents the excitation current at time t of the w-th knife switch node, t represents the total time,
。
different excitation currents are applied to the disconnecting link switch node with the step length of 1s, and the excitation currents are excited in an alternating current mode.
S402, performing topology analysis on the disconnecting link switch node based on a reference power flow direction to obtain all controlled load nodes, wherein the reference power flow direction is a current direction between the power supply node and the disconnecting link switch node.
It should be noted that the current direction is generally not changed, that is, the current direction between the power node and the disconnecting link switch node, and when a fault occurs, the current direction is changed, so that topology analysis needs to be performed on the disconnecting link switch node along the reference current direction to obtain all controlled load nodes, that is, load nodes whose switching states of the disconnecting link switch can change.
S403, acquiring current values of all controlled load nodes and recording the current values,
in the formula (I), the compound is shown in the specification,
represents the current of the mth load node>
Represents the current at the ith time of the mth load node;
represents the current at time t of the mth load node;
s404, calculating the current phase difference of the corresponding controlled load node according to the following formula:
in the formula (I), the compound is shown in the specification,
represents a second peak current, which is greater than or equal to the mth controlled load node>
Represents the first peak current, which represents the mth controlled load node>
Representing the current phase difference of the mth controlled load node;
s405, screening out controlled load nodes with current phase difference larger than 0 as positive correlation load nodes, and calculating the positive correlation synchronization indexes of the positive correlation load nodes as follows:
wherein Z represents a positive correlation synchronization index,
represents the difference between the current at the i-th time and the current at the i-1 th time of the mth load node, and/or>
Represents the difference between the current at the i-th instant of the mth controlled load node and the current at the i-1 th instant, and/or>
Represents a line impedance influencing factor, wherein>
Indicating the disconnecting link node to negativeLine voltage at the load node, R represents line resistance, X represents line reactance value, L represents line length from the knuckle point to the load node, and->
Representing a time interval, d representing a differential sign;
if the current phase difference of the load is negative, the load is a fault load, and may be a load requiring maintenance, that is, the load needs to be eliminated, and the controlled load node with the current phase difference larger than 0 is reserved as the positive correlation load node.
Meanwhile, whether the displacement states of the load node and the corresponding disconnecting link switch are in forward synchronization or not can be represented by calculating the current change rate of the load node and the change rate of the exciting current, and because the line impedance has certain influence on the current, the influence of the line impedance needs to be calculated and superposed into the current change rate of the load node, so that the calculation accuracy is improved.
S406, screening out the load nodes with positive correlation synchronization indexes larger than the preset index threshold value as the load nodes with positive correlation synchronization relations with the corresponding disconnecting link switch nodes, and recording the load nodes as M w,1 ,M w,2 ,M w,3 ,...,M w,v Wherein M is w,v The load node represents that the nth and the w-th disconnecting link switch nodes have positive correlation synchronization relation;
it should be noted that, in a general example, the preset index threshold should be 1, but since other loads may generate certain interference to the current, the preset index threshold is allowed to have a certain range, and through historical experience, the preset index threshold is set to be 0.8.
S407, constructing parallel resistance circuits by using second equivalent resistors respectively corresponding to all load nodes having positive correlation synchronization relationship with the w-th disconnecting link switching node, calculating the parallel resistance value of the parallel resistance circuit to be used as a third equivalent resistor, and performing equivalence on all load nodes having positive correlation synchronization relationship with the w-th disconnecting link switching node by using the third equivalent resistor.
Because the load nodes are in parallel connection, the corresponding second equivalent resistors need to form a parallel resistor circuit, and then the parallel resistor value of the parallel resistor circuit is calculated by using the calculation formula of the parallel resistors to serve as the third equivalent resistor.
In a specific embodiment, step S5 specifically includes:
s501, obtaining an operation task in the maintenance plan, performing word segmentation on the operation task to obtain a plurality of words, and sequencing all the words according to the word segmentation sequence to obtain a word sequence.
In one example, a power word dictionary is constructed, and word segmentation processing is carried out on the operation task.
S502, segmenting the word sequence according to the preset starting character and the preset ending character to obtain a plurality of operation links.
In the operation task, a prefix "start" can be added as a start character, a suffix "end" can be added as an end character, the start character and the end character are segmented by word segmentation, and the word sequence is segmented by identifying the start character and the end character so as to segment an operation link formed by two characters.
And S503, performing part-of-speech tagging on each word in the operation link, and filling the word subjected to the part-of-speech tagging into a preset operation template, wherein the preset operation template comprises operation equipment and a displacement state, the part-of-speech corresponding to the operation equipment is a number, a noun and an adjective, and the part-of-speech corresponding to the displacement state is a verb.
Wherein, the part of speech is number, etc., the noun and adjective are device names, and the verb is in a position changing state, such as closed or open.
And S504, mapping the operation equipment to a two-dimensional interface according to the corresponding position based on the wiring diagram of the transformer substation and the operation equipment in the operation link, and constructing an operation equipment map.
It can be understood that the wiring diagram of the substation is a connection relation between devices and other devices, and the operating device is mapped to the two-dimensional interface according to the corresponding position by mapping the name of the operating device in the wiring diagram of the substation, and is connected with the two-dimensional interface to construct an operating device map.
S505, sequencing the operation links according to preset operation logic based on the operation equipment map, and generating operation tickets for the sequenced operation links;
specifically, the method comprises the following steps:
s5051, performing topology analysis on each operating device based on a wiring diagram of the transformer substation to obtain device nodes associated with the operating device and the number of the device nodes;
the more the number of the affected devices is, the larger the hidden danger of the affected devices is, the more unstable the operation of the power grid is easily caused, and therefore, the operation devices need to be arranged in a descending order according to the number of the associated device nodes to improve the stability of the operation of the power grid.
S5052, arranging the operating devices in a descending order according to the number of the associated device nodes, and accordingly determining the initial sequence of the operating links;
and for the operation equipment with the same number of equipment nodes associated with the operation equipment, acquiring the line length between the corresponding operation equipment and the bus, sequencing the corresponding operation equipment according to the line length from short to long, and generating an operation ticket for the sequenced operation links.
It should be noted that, the shorter the line length between the distance and the bus, the closer the device nodes are, the more easily the device nodes are operated, and in order to improve the operation efficiency, the operating devices with the same number of device nodes associated with the operating devices are sorted according to the line length from short to long.
S506, identifying an operation instruction in the operation ticket, wherein the operation instruction comprises an operation link, operation equipment and a deflection state;
and S507, sequentially and sequentially carrying out simulated preview on each operation link in the electrical simulation circuit of the equipment according to the operation instruction, marking the operation link as previewed when the simulated preview of each operation link passes in the simulated preview process, and carrying out simulated preview on the next operation link until the simulated preview of the operation link passes.
In a specific embodiment, step S6 specifically includes:
s601, performing displacement operation on the disconnecting link switch node according to the operation instruction, wherein if the displacement operation is that the disconnecting link switch node is switched from closed displacement to open, equivalent inductance of the corresponding disconnecting link switch node is converted into a first equivalent resistance, and if the displacement operation is that the disconnecting link switch node is switched from open displacement to close, the equivalent first equivalent resistance of the corresponding disconnecting link switch node is converted into equivalent inductance.
And S602, measuring the instantaneous current variation of a third equivalent resistor corresponding to the switch node of the disconnecting link by using the pulse catcher.
In one embodiment, step S7 is preceded by:
s71, applying different excitation alternating-current square wave currents to the disconnecting link switch node in the same step length to obtain current actual measurement data of the second equivalent resistor generated by excitation of the excitation alternating-current square wave currents;
s72, deviation value detection is carried out on all current measured data, and the current measured data with the deviation value larger than a preset deviation threshold value are removed to obtain normal current measured data;
s73, performing difference value calculation on the normal current measured data of two adjacent time intervals to obtain a plurality of differential current data;
wherein, the process of calculating the difference value is as follows:
in the formula (I), the compound is shown in the specification,
represents differential current data, <' > is asserted>
Represents the measured data for the xth normal current, and->
Showing the x-1 normal current measured data.
S74, dividing the differential current data into a plurality of sections according to equal sliding windows, calculating the variance of the differential current data in each section, calculating the mean square error according to the variances to obtain the minimum mean square error and the maximum mean square error, and taking the range between the minimum mean square error and the maximum mean square error as the expected range of the instantaneous current.
It can be understood that the number of the differential current data can be several, the number of the differential current data is divided into several sections by sliding through a sliding window, the number of the differential current data in each section is equal, then the variance of the differential current data in each section is calculated, the mean square error is calculated by using the variance to obtain the minimum mean square error and the maximum mean square error, the range between the minimum mean square error and the maximum mean square error is used as the expected range of the instantaneous current, and the mean square error can more represent the volatility of the discrete data.
In a specific embodiment, step S72 specifically includes:
s721, calculating the arithmetic mean difference of all the current measured data;
s722, calculating a deviation value between each current measured data and the arithmetic average difference;
and S723, calculating standard deviations of all the current actual measurement data, judging whether deviation values of the current actual measurement data are more than two times of the standard deviations, and if the deviation values of the current actual measurement data are more than two times of the standard deviations, rejecting the corresponding current actual measurement data to obtain normal current actual measurement data.
In a specific embodiment, step S7 is followed by:
s8, if the link check in the operation ticket passes, locally storing the operation ticket, adding an operation Identity (ID) to the operation ticket, and uploading the operation ticket to a front-end browser;
and S9, matching the operation ID through the front-end browser according to the pre-input ID, checking the operation ticket if the matching is successful, and generating matching failure information for early warning if the matching is failed.
It can be understood that the worker can log in his/her own identity ID to the front-end browser, and match the operation identity ID with the identity ID, and if the matching is successful, the operation ticket is specified by the worker, so as to improve the security.
The present invention also provides an electronic device, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
the memory has stored therein a computer program which, when executed by the processor, causes the processor to carry out the steps of the above-mentioned method.
The invention also provides a computer-readable storage medium storing a computer program executable by an electronic device, which, when run on the electronic device, causes the electronic device to perform the steps of the above-mentioned method.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A simulation verification method for a disconnecting link switch operation ticket is characterized by comprising the following steps:
s1, obtaining basic information corresponding to all equipment of a transformer substation, wherein the basic information comprises an equipment number, an equipment name, an equipment type and an equipment electrical parameter;
s2, carrying out simulation modeling based on the topological relations and basic information of all equipment of the transformer substation to obtain an equipment simulation model;
s3, obtaining equipment node types in the equipment simulation model, wherein the equipment node types comprise a disconnecting link switch node, a load node and a power supply node, identifying the opening and closing state of the disconnecting link switch node, enabling the disconnecting link switch node with the opening and closing state to be equivalent to a first equivalent resistor, enabling the disconnecting link switch node with the opening and closing state to be equivalent to an equivalent inductor, enabling the load node to be equivalent to a second equivalent resistor, and enabling the power supply node to be equivalent to an equivalent capacitor, so that the equipment simulation model is converted into an equipment electrical simulation circuit;
s4, traversing each switch node in the electrical simulation circuit of the equipment, identifying load nodes with positive correlation synchronization relationship in each switch node according to a preset power flow rule, and carrying out equivalence on all the load nodes with positive correlation synchronization relationship by using a third equivalent resistor;
s5, analyzing an operation task in the maintenance plan, generating an operation ticket, identifying an operation instruction in the operation ticket, and performing simulation rehearsal of each link in the equipment electrical simulation circuit according to the operation instruction;
s6, performing displacement operation on the disconnecting link switch node according to the operation instruction to obtain the instantaneous current variable quantity of the corresponding third equivalent resistor;
and S7, judging whether the instantaneous current variation meets a preset instantaneous current expected range or not, if the instantaneous current variation meets the preset instantaneous current expected range, checking the link corresponding to the operation ticket to pass, executing the displacement operation of the disconnecting link switch node of the next link according to the step S6, if the instantaneous current variation does not meet the preset expected range, checking the operation ticket to fail, and returning to the step S5 until all links in the operation ticket are checked to pass.
2. The method for simulation verification of the disconnecting link switch operation ticket according to claim 1, wherein the step S4 specifically comprises:
s401, starting from the power supply node in the electrical simulation circuit of the equipment, traversing each disconnecting link switch node along the direction of a feeder line, applying different excitation currents to the disconnecting link switch nodes in the same step length, wherein the time sequence of the formed excitation currents is recorded as,
in the formula (I), the compound is shown in the specification,
representing the w-th knife switch node,
represents the excitation current at the ith time of the w-th disconnecting link switching node,
represents the excitation current at time t of the w-th disconnecting link switching node, t represents the total time, and
；
s402, performing topology analysis on the disconnecting link switch node based on a reference power flow direction to obtain all controlled load nodes, wherein the reference power flow direction is a current direction between the power supply node and the disconnecting link switch node;
s403, acquiring current values of all controlled load nodes and recording the current values,
in the formula (I), the compound is shown in the specification,
representing the current at the mth load node,
represents the current at the ith time of the mth load node;
represents the current at time t of the mth load node;
s404, calculating the current phase difference of the corresponding controlled load node according to the following formula:
in the formula (I), the compound is shown in the specification,
representing the second peak current at the mth controlled load node,
representing the first peak current of the mth controlled load node,
representing the current phase difference of the mth controlled load node;
s405, screening out controlled load nodes with current phase difference larger than 0 as positive correlation load nodes, and calculating the positive correlation synchronization indexes of the positive correlation load nodes as follows:
wherein Z represents a positive correlation synchronization index,
representing the difference between the current at time i and the current at time i-1 of the mth load node,
representing the difference between the current at time i and the current at time i-1 of the mth controlled load node,
which represents the factor that the line impedance affects,
representing the time interval, d representing the differential sign;
s406, screening the load nodes with positive correlation synchronization indexes larger than a preset index threshold value as corresponding disconnecting links to be switched onThe joint points have positive correlation synchronization relationship, and are marked as M w,1 ,M w,2 ,M w,3 ,...,M w,v Wherein M is w,v The load node represents that the nth and the w-th disconnecting link switch nodes have positive correlation synchronization relation;
s407, constructing parallel resistance circuits by using second equivalent resistors respectively corresponding to all load nodes having positive correlation synchronization relationship with the w-th disconnecting link switch node, calculating the parallel resistance value of the parallel resistance circuit to be used as a third equivalent resistor, and performing equivalence on all load nodes having positive correlation synchronization relationship with the w-th disconnecting link switch node by using the third equivalent resistor.
3. The method for simulation verification of the disconnecting link switch operation ticket according to claim 1, wherein the step S5 specifically comprises:
s501, obtaining an operation task in the maintenance plan, performing word segmentation on the operation task to obtain a plurality of words, and sequencing all the words according to the word segmentation sequence to obtain a word sequence;
s502, segmenting the word sequence according to a preset starting character and a preset ending character to obtain a plurality of operation links;
s503, performing part-of-speech tagging on each word in the operation link, and filling the word subjected to the part-of-speech tagging into a preset operation template, wherein the preset operation template comprises operation equipment and a displacement state, the part-of-speech corresponding to the operation equipment is a number, a noun and an adjective, and the part-of-speech corresponding to the displacement state is a verb;
s504, mapping the operating equipment to a two-dimensional interface according to corresponding positions based on a wiring diagram of the transformer substation and the operating equipment in the operating link, and constructing an operating equipment map;
s505, sequencing the operation links according to a preset operation logic based on the operation equipment map, and generating operation tickets for the sequenced operation links;
s506, identifying an operation instruction in the operation ticket, wherein the operation instruction comprises an operation link, operation equipment and a deflection state;
and S507, sequentially and sequentially performing simulated preview of each operation link in the electrical simulation circuit of the equipment according to the operation instruction, marking the operation link as previewed when the simulated preview of each operation link passes in the simulated preview process, and performing simulated preview of the next operation link until the simulated preview of the operation link passes.
4. The method for verifying the simulation of the operation ticket of the disconnecting link switch according to claim 3, wherein the step S505 specifically comprises:
performing topology analysis on each operating device based on a wiring diagram of the transformer substation to obtain device nodes associated with the operating devices and the number of the device nodes;
arranging the operating devices in a descending order according to the number of the associated device nodes, thereby determining the initial ordering of the operating links;
and for the operation equipment with the same number of equipment nodes associated with the operation equipment, acquiring the line length between the corresponding operation equipment and the bus, sequencing the corresponding operation equipment according to the line length from short to long, and generating an operation ticket for the sequenced operation links.
5. The method for the simulation verification of the disconnecting link switch operation ticket according to claim 1, wherein the step S6 specifically comprises:
s601, performing displacement operation on the disconnecting link switch node according to the operation instruction, wherein if the displacement operation is that the disconnecting link switch node is switched from closed displacement to open, equivalent inductance of the corresponding disconnecting link switch node is converted into a first equivalent resistance, and if the displacement operation is that the disconnecting link switch node is switched from open displacement to closed, the equivalent first equivalent resistance of the corresponding disconnecting link switch node is converted into equivalent inductance;
and S602, measuring the instantaneous current variation of a third equivalent resistor corresponding to the disconnecting link switch node by using a pulse catcher.
6. The method for the simulation verification of the disconnecting link switch operation ticket according to claim 1, wherein the step S7 is preceded by:
s71, applying different excitation alternating-current square wave currents to the disconnecting link switch node in the same step length to obtain current actual measurement data of the second equivalent resistor generated by excitation of the excitation alternating-current square wave currents;
s72, deviation value detection is carried out on all current measured data, and the current measured data with the deviation value larger than a preset deviation threshold value are removed to obtain normal current measured data;
s73, performing difference value calculation on the normal current measured data of two adjacent time intervals to obtain a plurality of differential current data;
s74, dividing the differential current data into a plurality of sections according to equal sliding windows, calculating the variance of the differential current data in each section, calculating the mean square error according to the variances to obtain the minimum mean square error and the maximum mean square error, and taking the range between the minimum mean square error and the maximum mean square error as the expected range of the instantaneous current.
7. The method for verifying the simulation of the operation ticket of the disconnecting link switch according to claim 6, wherein the step S72 specifically comprises:
s721, calculating the arithmetic mean difference of all the current measured data;
s722, calculating a deviation value between each current measured data and the arithmetic average difference;
and S723, calculating standard deviations of all the current actual measurement data, judging whether deviation values of the current actual measurement data are more than two times of the standard deviations, and if the deviation values of the current actual measurement data are more than two times of the standard deviations, rejecting the corresponding current actual measurement data to obtain normal current actual measurement data.
8. The method for verifying the simulation of the operation ticket of the disconnecting link switch according to claim 1, wherein the step S7 is followed by the steps of:
if all links in the operation ticket pass the verification, locally storing the operation ticket, adding an operation Identity (ID) to the operation ticket, and uploading the operation ticket to a front-end browser;
and matching the operation identity ID according to the identity ID input in advance through the front-end browser, checking the operation ticket if the matching is successful, and generating matching failure information for early warning if the matching is failed.
9. An electronic device, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
the memory has stored therein a computer program which, when executed by the processor, causes the processor to carry out the steps of the method of any one of claims 1 to 8.
10. A computer-readable storage medium, in which a computer program is stored which is executable by an electronic device, and which, when run on the electronic device, causes the electronic device to carry out the steps of the method according to any one of claims 1 to 8.
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