CN112946385B - Transformer area power failure point positioning method based on circuit breaker - Google Patents
Transformer area power failure point positioning method based on circuit breaker Download PDFInfo
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Abstract
The invention discloses a power failure point positioning method for a transformer substation based on a circuit breaker, and belongs to the technical field of transformer substation equipment. According to the power failure point positioning method for the transformer area based on the circuit breaker, disclosed by the invention, through constructing the power failure positioning study and judgment model, the sensing information of each level of equipment in the transformer area such as users, meter boxes, branch boxes, transformers and the like in the transformer area can be scientifically fused and utilized, the accurate positioning of the power failure fault point is realized, and further, the method is suitable for a fine transformer area, the checking and guiding of the power failure problem are completed, and the power first-aid repair efficiency is further improved. Furthermore, by applying the fault location identification method, the functions of state monitoring, power failure reporting and the like of sensing equipment in the fine transformer area are effectively utilized, the accurate location of the full fault emergency repair position of the transformer-branch-meter box in the power failure of the fine transformer area is realized, and the power failure emergency repair service capability of a client side is further tamped.
Description
Technical Field
The invention relates to a power failure point positioning method for a transformer substation based on a circuit breaker, and belongs to the technical field of transformer substation equipment.
Background
Along with the gradual construction and the popularization of current boutique platform district, the on-the-spot monitoring node in the low pressure platform district is on original transformer side, user side's basis, based on equipment such as intelligent circuit breaker, has further deepened into nodes such as the inside circuit branch of platform district, table case, has now been realized the meticulous perception of platform district inside power supply and utilization panorama formula information basically transporting the boutique platform district. The existing power failure research and judgment method has relatively single reference factor, and fails to reasonably utilize the power failure strong related information such as the opening and closing state of key node equipment, as shown in fig. 1. Meanwhile, in the aspect of output of a study and judgment result, the original algorithm still stays at a power failure appearance presentation stage and does not sink to the study and judgment of fault essence, and although the investigation range can be reduced for fault first-aid repair work, the overall requirement of lean management of a fine-quality platform area cannot be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the power failure point positioning method based on the circuit breaker, which can scientifically fuse and utilize the sensing information of each level equipment in the transformer area such as users, meter boxes, branch boxes, transformers and the like in the transformer area by constructing the power failure positioning studying and judging model, can further perform troubleshooting and guiding on the power failure problem, realizes the accurate positioning of the power failure point and further improves the power emergency repair efficiency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for positioning power failure point of transformer area based on circuit breaker,
the method comprises the following steps:
firstly, a master station side of an electricity consumption information acquisition system acquires topological information and related information of equipment in a transformer area;
secondly, establishing a power failure positioning studying and judging model, wherein the power failure positioning studying and judging model comprises power failure positioning studying and judging of a meter box layer, power failure positioning studying and judging of a branch layer and power failure positioning studying and judging of a power distribution room or a power distribution box;
thirdly, when the master station receives a power failure event or breaker disconnection information reported by the transformer area convergence terminal or the breaker or the ammeter, after the original power failure area is researched and judged; starting to position and study and judge the power failure fault point by utilizing the power failure positioning study and judge model;
the fault point is in a meter box or a branch line segment or a branch box or a transformer outgoing line or a distribution room;
fourthly, outputting power failure fault point positioning information according to the power failure abnormal positioning studying and judging result;
and fifthly, synchronously pushing the power supply service command system through the current channel of the power consumption information acquisition system with the power failure fault positioning information.
Through continuous exploration and test, the power failure positioning study and judgment model is constructed, so that the sensing information of each level of equipment in the transformer area such as users, meter boxes, branch boxes and transformers in the transformer area can be scientifically fused and utilized, the power failure fault point can be accurately positioned, the power failure positioning study and judgment method is further suitable for a fine transformer area, the troubleshooting guidance of the power failure problem is completed, and the power first-aid repair efficiency is further improved.
Furthermore, by applying the fault location identification method, the functions of state monitoring, power failure reporting and the like of sensing equipment in the fine transformer area are effectively utilized, the accurate location of the full fault emergency repair position of the transformer-branch-meter box in the power failure of the fine transformer area is realized, and the power failure emergency repair service capability of a client side is further tamped.
The method comprises the steps that a fine platform area (4 branches, 13 meter boxes and 133 users) with a known topology is selected for test through the existing fusion terminal and intelligent circuit breaker equipment. In the power utilization information acquisition system main station test environment, the positioning method is deployed, multi-node power failure information in a meter box, a branch box, a transformer side and the like is simulated, the recommendation of power failure first-aid repair positions in the power utilization information acquisition system main station is realized, and the accuracy of power failure fault positioning can reach 100%.
As a preferable technical measure:
the meter box layer power failure positioning research and judgment is carried out through comprehensive research and judgment of the single meter and the intelligent circuit breaker at the inlet wire of the meter box to determine whether a power failure fault point occurs in the meter box, so that the on-site fault point troubleshooting link of emergency repair personnel is reduced, and the emergency repair efficiency is improved; the method specifically comprises the following steps:
firstly, marking the single table determined as effective power failure based on the existing single table power failure research and judgment algorithm;
checking the state of a breaker at the incoming line of the meter box;
when the incoming line breaker of the meter box is in a normal closed state, the meter box is marked with a single meter position for effective power failure, and the front-meter wiring of the single meter in the meter box is a power failure fault point to be checked;
fourthly, when the incoming line breaker of the meter box is in an off state, further judging the self electrification condition of the breaker;
the breaker is normally electrified, and the switch is off, so that the power failure fault point can be determined as the breaker;
sixthly, the breaker is not electrified, the power failure fault does not actually occur at the meter box, and the rush-repair work does not need to go to the site of the meter box.
As a preferable technical measure:
the branch layer power failure positioning study and judgment is carried out through an intelligent circuit breaker at a branch box, and whether a power failure fault point occurs in the branch box or a certain branch line is determined by combining information sent by incomplete study and judgment of a meter box layer, so that the on-site fault point inspection link of rush-repair personnel is reduced, and the rush-repair efficiency is improved.
The method specifically comprises the following steps:
checking whether a meter box layer has a power failure positioning study, and determining a power failure fault point positioning upper delivery condition;
checking the state of the circuit breaker of the tail end branch box;
thirdly, when the breaker of the tail end branch box is in a normal closed state, the branch line corresponding to the meter box is sent to a fault point needing to be checked for on-site power failure emergency repair when power failure positioning information research and judgment is required;
fourthly, when the circuit breaker of the tail end branch box is in a disconnection state, further judging the self electrification condition of the circuit breaker;
the breaker is normally electrified, the switch is off, the power failure fault point is the breaker, and emergency repair personnel directly go to a branch box corresponding to the breaker to perform incoming line emergency repair work;
sixthly, the breaker is not electrified, and the actual position of the power failure fault does not occur below the branch box;
seventhly, repeating the research and judgment process, and finding a fault point by a research and judgment value, wherein the power failure fault point of the meter box layer in the first step is positioned and sent to be triggered by a breaker of a tail end branch box;
if the fault point is not found in the first-stage branch box, the power failure fault point is generated in a station zone branch layer, and the positioning research and judgment requirements are further sent upwards.
As a preferable technical measure:
the power failure location research and judgment of the power distribution room or the distribution box carries out comprehensive research and judgment through the transformer outgoing line circuit breaker and the station area fusion terminal, and whether a power failure fault point occurs in the power distribution room or not is determined by combining the unfinished information sent by the research and judgment at the position of the station area first-level branch box circuit breaker, so that the on-site fault point investigation link of rush-repair personnel is reduced, and the rush-repair efficiency is improved.
The method specifically comprises the following steps:
checking whether a branch layer power failure positioning study judges the positioning of a power failure fault point of the sixth kind of power failure and a sending condition;
checking the state of the circuit breaker at the outgoing line side of the transformer;
when the outgoing line breaker of the transformer is in a normal closed state, the state of the breaker of the first-stage branch box of the transformer area, which is sent by the power failure positioning information research and judgment requirement, is further called and tested;
fourthly, circulating for 5 times, and if the result shows that the state of the outgoing line breaker of the transformer is normal all the time and the calling and testing of the breaker of the primary branch box fails, positioning the power failure fault as the outgoing line position of the transformer;
judging the validity of information by further combining the transformer area fusion terminal when the outgoing line breaker of the transformer is in a disconnection or power failure state;
judge the fusion terminal in the room of joining in marriage with the breaker electrified state of being qualified for the next round of competitions, exist uncharged condition and then judge the fault point in joining in marriage the room, salvage personnel directly go to the platform district and join in marriage and carry out the work of salvageing of having a power failure in the room.
As a preferable technical measure:
confirming the reliability of the equipment power failure information:
by calling up the voltage U of the device,
when the U meets any one of the following conditions, the power failure information reported by the equipment is considered to be effective
①U＝0；
②0＜U≤132V；
Calling for failure;
when the voltage value is larger than or equal to 132, the fusion terminal, the breaker or the electric meter is not powered off.
As a preferable technical measure:
the topology information of the equipment in the transformer area is obtained by a transformer area topology identification method;
the station area topology identification method adopts a parallel identification method and/or a serial identification method, issues a characteristic current sending command to each monitoring unit in the station area, and realizes topology identification of a station area 'variable-line-box-table' topology relation and phase through sampling and detecting characteristic current signals by each level of sensing units at a branch box side and a transformer side and a modular terminal;
which comprises the following steps:
the method comprises the steps that firstly, a master station of a power utilization information acquisition system is used for collecting topology identification records reported by all devices, wherein the records comprise identification time; then, according to the switching time of each device set and issued by the main station, namely the characteristic current sending time, a topological information summary data table corresponding to the sending device and the identification device is formed;
according to the equipment characteristic current sending plan of the main station, continuously comparing the planned switching time of the equipment with the identification time in the topology identification record, and continuously increasing the content of a data table summarized by the topology information; the device comprises an ammeter;
secondly, after the work of establishing the topological information summary data table is completed, the levels of all the devices in the table are made clear; the process is synchronous with the establishing process of the table;
thirdly, confirming the direct superior equipment of each level of equipment according to the level sequence from top to bottom;
fourthly, drawing a core topological structure chart according to the analysis result of the third step;
fifthly, perfecting the relation of the electric meters; continuously finishing the association between the electric meters and the intelligent breakers at the topological tail ends, and finding the corresponding intelligent breaker at the lowest level of each electric meter transmission time line in the topological information summary data table, wherein the intelligent breaker is the superior equipment of the electric meter; and finally, integrating the core topological structure of the transformer area and the relation information of the electric meters, and drawing to form the complete topology of the transformer area.
Through continuous exploration and tests, the characteristic current sending and identifying functions of the sensing equipment are scientifically distributed in the executing process and identification information is effectively utilized, the relation identification of 'change-line-box-table' in a fine-quality platform area is realized, the management foundation of the power supply and utilization end link at the client side is further tamped, and the line loss management, power failure first-aid repair and client service capabilities of the platform area are improved.
Furthermore, by developing a modular terminal and a multi-epitope monitoring unit, the topology identification method provided by the invention is tested in a certain platform area (4 branches, 40 meter boxes and 79 users) with known topology. In the station area, the master station of the electricity consumption information acquisition system adopts the master station side topology identification method and the execution method, sends a characteristic current sending command to each monitoring unit in the station area, and samples and detects characteristic current signals through each level of sensing units at the side of the branch box and the side of the transformer and the modular terminal, so that the automatic identification of the topological relation and the phase of the station area 'change-line-box-table' is realized, and the accuracy can reach 100%.
As a preferable technical measure:
the parallel identification method identifies all the transformer areas at the same time, and n devices in all the transformer areas basically transmit characteristic currents at the same time;
the serial identification method identifies the devices which are selected by the parallel identification method and are missed to be identified due to time mark setting failure or communication failure or cross-station interference one by one, and can also identify the individual station areas or the user variation and the topology of the devices.
As a preferable technical measure:
the parallel identification method specifically comprises the following steps:
the method comprises the following steps that firstly, a master station selects a station area needing topology identification, sets the starting time X of equipment sending, sends an interval L and sends a topology identification parallel method instruction;
step two, the master station combs the number M of each table area device of the selected table area archive, and automatically sets the characteristic current sending time of all the devices at the interval of L from the time point X, X + L, X +2L, …, X + (M-1) × L;
step three, the master station finds out the maximum number N of each zone device of the selected zone file, wherein the maximum number N comprises an energy circuit breaker and a module, and the master station starts to identify and count down and prompts that a distance parallel identification method starts X in time setting; the X is the current time;
step four, the master station informs the corresponding meter and the intelligent circuit breaker of all the set sending time through the modular terminal in the selected range;
step five, when the time of the master station runs to X, the prompt of the master station is switched to 'parallel method identification is in progress, and the distance is N X L + 300';
step six, all equipment sends characteristic current according to preset time, and after the preset time is reached, the equipment is automatically triggered to switch the current in sequence;
step seven, the alternate collection of all intelligent circuit breakers and modular terminals is always in a detection state, if a characteristic current signal is detected, the current magnitude, the phase and the identification time are stored in the local equipment, active reporting events are set for the terminals and the intelligent circuit breakers, and the detected identification results are reported to a master station through the terminals;
step eight, continuously transmitting and identifying until all the equipment finishes transmitting;
step nine, when the parallel method is finished, the countdown of the master station is finished, the time stamp results recorded by all the terminals and the intelligent circuit breaker are reported to the master station, and the master station prompts that the topology identification parallel method is finished and the master station results are analyzed;
and step ten, the master station sorts and analyzes according to the time stamp, calculates to obtain the topological relation at the moment, and identifies the number T and the address of the failed equipment.
As a preferable technical measure:
the serial identification method mainly comprises the following steps:
step one, judging on the basis of a topology identification parallel method, if no identification failure equipment exists, directly jumping to the end of the process, ending, and if identification failure equipment exists, performing the next step;
step two, setting serial identification starting time Y, sending an interval K, clicking to send a topological identification serial method instruction, and setting a user change identification queue for the screened equipment by the master station according to the interval K from the time point Y;
step three, the master station starts to recognize countdown to prompt that the distance serial method starts to recognize Y in time setting;
y-current time;
step four, the master station informs the set characteristic current sending time to the equipment with the corresponding address through the terminal;
step five, finishing time setting of the equipment screened by all the parallel methods;
step six, when the time of the master station runs to Y, the prompt of the master station is switched to 'a serial identification method is in progress, and the distance T x K + 300' is ended;
step seven, all equipment sends the characteristic current according to the preset time, and after the preset time is reached, the equipment is automatically triggered to switch the current in sequence;
step eight, all the modular terminals and the intelligent circuit breakers adopt and always detect the characteristic current signals, if the characteristic current signals are detected, the current magnitude, the phase and the corresponding identification time are bound and stored in local equipment, and the terminals and the intelligent circuit breakers report the detected identification results to the master station through the terminals;
step nine, continuously transmitting and identifying until all the equipment finishes transmitting;
step ten, when the serial method is finished, the master station finishes countdown, the master station sorts and analyzes the storage records obtained by the parallel method and the serial method, and the current user variation relationship and the physical topology are obtained according to a time mark comparison algorithm;
and step eleven, informing operation and maintenance personnel to correct and update the wrong user variable relationship or to perform problem troubleshooting.
As a preferable technical measure:
the power utilization information acquisition system is used for taking charge of overall control and scheduling, time distribution and sending interval setting, and carding and analyzing the collected time marks to obtain a real physical topology;
the master station is used for finishing related work including equipment asset entry, parameter configuration issuing, topology identification execution process control, reported information gathering and identification result study and judgment.
Compared with the prior art, the invention has the following beneficial effects:
through continuous exploration and test, the power failure positioning study and judgment model is constructed, so that the sensing information of each level of equipment in the transformer area such as users, meter boxes, branch boxes and transformers in the transformer area can be scientifically fused and utilized, the power failure fault point can be accurately positioned, the power failure positioning study and judgment method is further suitable for a fine transformer area, the troubleshooting guidance of the power failure problem is completed, and the power first-aid repair efficiency is further improved.
Furthermore, by applying the fault location identification method, the functions of state monitoring, power failure reporting and the like of sensing equipment in the fine transformer area are effectively utilized, the accurate location of the full fault emergency repair position of the transformer-branch-meter box in the power failure of the fine transformer area is realized, and the power failure emergency repair service capability of a client side is further tamped.
Drawings
FIG. 1 is a flow chart of a conventional power outage study and judgment algorithm of the present invention;
FIG. 2 is a comparison of the present invention and the prior art;
FIG. 3 is a schematic diagram of a power failure fault location concept of the fine-quality distribution room of the present invention;
FIG. 4 is a table case layer power outage positioning algorithm of the present invention;
FIG. 5 is a branch layer outage positioning algorithm of the present invention;
fig. 6 shows the power failure positioning algorithm of the power distribution room (box) of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
As shown in fig. 2-3, a method for locating a blackout point of a station area based on a circuit breaker,
the method comprises the following steps:
firstly, a master station side of an electricity consumption information acquisition system acquires topological information and related information of equipment in a transformer area;
secondly, establishing a power failure positioning studying and judging model, wherein the power failure positioning studying and judging model comprises power failure positioning studying and judging of a meter box layer, power failure positioning studying and judging of a branch layer and power failure positioning studying and judging of a power distribution room or a power distribution box;
thirdly, when the master station receives a power failure event or breaker disconnection information reported by the transformer area convergence terminal or the breaker or the ammeter, after the original power failure area is researched and judged; starting to position and study and judge the power failure fault point by utilizing the power failure positioning study and judge model;
the fault point is in a meter box or a branch line segment or a branch box or a transformer outgoing line or a distribution room;
fourthly, outputting power failure fault point positioning information according to the power failure abnormal positioning studying and judging result;
and fifthly, synchronously pushing the power supply service command system through the current channel of the power consumption information acquisition system with the power failure fault positioning information.
Through continuous exploration and test, the power failure positioning study and judgment model is constructed, so that the sensing information of each level of equipment in the transformer area such as users, meter boxes, branch boxes and transformers in the transformer area can be scientifically fused and utilized, the power failure fault point can be accurately positioned, the power failure positioning study and judgment method is further suitable for a fine transformer area, the troubleshooting guidance of the power failure problem is completed, and the power first-aid repair efficiency is further improved.
Furthermore, by applying the fault location identification method, the functions of state monitoring, power failure reporting and the like of sensing equipment in the fine transformer area are effectively utilized, the accurate location of the full fault emergency repair position of the transformer-branch-meter box in the power failure of the fine transformer area is realized, and the power failure emergency repair service capability of a client side is further tamped.
As shown in fig. 4, a specific embodiment of the meter box layer power failure location research and judgment of the present invention:
the meter box layer power failure positioning research and judgment is carried out through comprehensive research and judgment of the single meter and the intelligent circuit breaker at the inlet wire of the meter box to determine whether a power failure fault point occurs in the meter box, so that the on-site fault point troubleshooting link of emergency repair personnel is reduced, and the emergency repair efficiency is improved; the method specifically comprises the following steps:
firstly, marking the single table determined as effective power failure based on the existing single table power failure research and judgment algorithm;
checking the state of a breaker at the incoming line of the meter box;
when the incoming line breaker of the meter box is in a normal closed state, the meter box is marked with a single meter position for effective power failure, and the front-meter wiring of the single meter in the meter box is a power failure fault point to be checked;
fourthly, when the incoming line breaker of the meter box is in an off state, further judging the self electrification condition of the breaker;
the breaker is normally electrified, and the switch is off, so that the power failure fault point can be determined as the breaker;
sixthly, the breaker is not electrified, the power failure fault does not actually occur at the meter box, and the rush-repair work does not need to go to the site of the meter box.
As shown in fig. 5, an embodiment of the branch layer power outage positioning research and judgment of the present invention:
the branch layer power failure positioning study and judgment is carried out through an intelligent circuit breaker at a branch box, and whether a power failure fault point occurs in the branch box or a certain branch line is determined by combining information sent by incomplete study and judgment of a meter box layer, so that the on-site fault point inspection link of rush-repair personnel is reduced, and the rush-repair efficiency is improved.
The method specifically comprises the following steps:
checking whether a meter box layer has a power failure positioning study, and determining a power failure fault point positioning upper delivery condition;
checking the state of the circuit breaker of the tail end branch box;
thirdly, when the breaker of the tail end branch box is in a normal closed state, the branch line corresponding to the meter box is sent to a fault point needing to be checked for on-site power failure emergency repair when power failure positioning information research and judgment is required;
fourthly, when the circuit breaker of the tail end branch box is in a disconnection state, further judging the self electrification condition of the circuit breaker;
the breaker is normally electrified, the switch is off, the power failure fault point is the breaker, and emergency repair personnel directly go to a branch box corresponding to the breaker to perform incoming line emergency repair work;
sixthly, the breaker is not electrified, and the actual position of the power failure fault does not occur below the branch box;
seventhly, repeating the research and judgment process, and finding a fault point by a research and judgment value, wherein the power failure fault point of the meter box layer in the first step is positioned and sent to be triggered by a breaker of a tail end branch box;
if the fault point is not found in the first-stage branch box, the power failure fault point is generated in a station zone branch layer, and the positioning research and judgment requirements are further sent upwards.
As shown in fig. 6, a specific embodiment of the power failure location research and judgment of the power distribution room or the power distribution box of the present invention:
the power failure location research and judgment of the power distribution room or the distribution box carries out comprehensive research and judgment through the transformer outgoing line circuit breaker and the station area fusion terminal, and whether a power failure fault point occurs in the power distribution room or not is determined by combining the unfinished information sent by the research and judgment at the position of the station area first-level branch box circuit breaker, so that the on-site fault point investigation link of rush-repair personnel is reduced, and the rush-repair efficiency is improved.
The method specifically comprises the following steps:
checking whether a branch layer power failure positioning study judges the positioning of a power failure fault point of the sixth kind of power failure and a sending condition;
checking the state of the circuit breaker at the outgoing line side of the transformer;
when the outgoing line breaker of the transformer is in a normal closed state, the state of the breaker of the first-stage branch box of the transformer area, which is sent by the power failure positioning information research and judgment requirement, is further called and tested;
fourthly, circulating for 5 times, and if the result shows that the state of the outgoing line breaker of the transformer is normal all the time and the calling and testing of the breaker of the primary branch box fails, positioning the power failure fault as the outgoing line position of the transformer;
judging the validity of information by further combining the transformer area fusion terminal when the outgoing line breaker of the transformer is in a disconnection or power failure state;
judge the fusion terminal in the room of joining in marriage with the breaker electrified state of being qualified for the next round of competitions, exist uncharged condition and then judge the fault point in joining in marriage the room, salvage personnel directly go to the platform district and join in marriage and carry out the work of salvageing of having a power failure in the room.
The invention discloses a specific embodiment of equipment power failure information, which comprises the following steps:
confirming the reliability of the equipment power failure information:
by calling up the voltage U of the device,
when the U meets any one of the following conditions, the power failure information reported by the equipment is considered to be effective
①U＝0；
②0＜U≤132V；
Calling for failure;
when the voltage value is larger than or equal to 132, the fusion terminal, the breaker or the electric meter is not powered off.
The invention relates to a specific embodiment of a method for identifying a platform area topology, which comprises the following steps:
the topology information of the equipment in the transformer area is obtained by a transformer area topology identification method;
the station area topology identification method adopts a parallel identification method and/or a serial identification method, issues a characteristic current sending command to each monitoring unit in the station area, and realizes topology identification of a station area 'variable-line-box-table' topology relation and phase through sampling and detecting characteristic current signals by each level of sensing units at a branch box side and a transformer side and a modular terminal;
which comprises the following steps:
the method comprises the steps that firstly, a master station of a power utilization information acquisition system is used for collecting topology identification records reported by all devices, wherein the records comprise identification time; then, according to the switching time of each device set and issued by the main station, namely the characteristic current sending time, a topological information summary data table corresponding to the sending device and the identification device is formed;
according to the equipment characteristic current sending plan of the main station, continuously comparing the planned switching time of the equipment with the identification time in the topology identification record, and continuously increasing the content of a data table summarized by the topology information; the device comprises an ammeter;
secondly, after the work of establishing the topological information summary data table is completed, the levels of all the devices in the table are made clear; the process is synchronous with the establishing process of the table;
thirdly, confirming the direct superior equipment of each level of equipment according to the level sequence from top to bottom;
fourthly, drawing a core topological structure chart according to the analysis result of the third step;
fifthly, perfecting the relation of the electric meters; continuously finishing the association between the electric meters and the intelligent breakers at the topological tail ends, and finding the corresponding intelligent breaker at the lowest level of each electric meter transmission time line in the topological information summary data table, wherein the intelligent breaker is the superior equipment of the electric meter; and finally, integrating the core topological structure of the transformer area and the relation information of the electric meters, and drawing to form the complete topology of the transformer area.
The parallel identification method identifies all the transformer areas at the same time, and n devices in all the transformer areas basically transmit characteristic currents at the same time;
the serial identification method identifies the devices which are selected by the parallel identification method and are missed to be identified due to time mark setting failure or communication failure or cross-station interference one by one, and can also identify the individual station areas or the user variation and the topology of the devices.
The power utilization information acquisition system is used for taking charge of overall control and scheduling, time distribution and sending interval setting, and carding and analyzing the collected time marks to obtain a real physical topology;
the master station is used for finishing related work including equipment asset entry, parameter configuration issuing, topology identification execution process control, reported information gathering and identification result study and judgment.
The invention generates a specific embodiment of a topological information summary data table:
the master station collects topology identification records (including identification time) reported by each device, and then forms a topology information summary data table corresponding to the sending device and the identification device according to the switching time (namely characteristic current sending time) of each device (including an ammeter) set and issued by the master station. And (4) according to the equipment characteristic current sending plan of the main station, continuously comparing the planned switching time of the equipment with the identification time in the topology identification record, and continuously increasing the content of the topology information summary data table.
The following table is an example of a summary data table of topology information, and for simplicity and ease of calculation, a detected value is labeled as 1, and an undetected value is labeled as 0. Taking the record of L rows as an example, A, E, J three devices are shown as devices that recognize the characteristic current signal sent by the L device.
Remarking: a represents a modular terminal; ② this example does not relate to electrical skins; and no matter whether the breaker can detect the characteristic current signal sent by the breaker or not, the tables do not show the record of the self-generating and self-receiving types for the sake of convenience.
A specific embodiment of the device level confirmation of the present invention:
after the work of establishing the topology information summary data table is completed, the levels of all the devices in the table are further clarified. This process may be synchronized with the creation of the table, the rightmost already listed hierarchy of the table shown in the example above.
Based on the above example, the number of 1 in the row is accumulated to obtain the corresponding level of the device, and the following levels can be known from the information summary data table:
level 0: a (Default)
Level 1: B. d, F, J
Level 2: C. e, G, H, K, M
Level 3: I. l is
Note that: dynamic updating is carried out according to the reported data at this stage, and only equipment of each level can be continuously updated, namely new breaker equipment is continuously registered in each level; before the levels of all the devices are not determined, the relationship between the upper level and the lower level is difficult to confirm, namely, a topological graph cannot be accurately drawn.
An embodiment of the present invention for confirming superior devices of each level of devices is as follows:
the confirmation work of the directly upper device of each hierarchy device is performed in the order of the levels from the top to the bottom. The concrete method is as follows: in the row of the current device, a device higher than the current device is found, and the found device is unique, namely, the found device is a superior device of the current device.
1) For the device B, D, F, J of level 1, the direct upper level is the modular terminal a; can be expressed as A- > B/D/F/J
2) Device of discrimination level 2:
the C equipment line is used for searching equipment with the level of 1, namely B, B is the upper-level equipment of C and can be represented as B- > C;
e, the equipment line searches for equipment with the level of 1, namely J, wherein J is the upper-level equipment of E and can be expressed as J- > E;
the G equipment row is used for searching equipment with the level of 1, namely F, wherein F is the upper-level equipment of G and can be expressed as F- > G;
h equipment row, finding equipment with the level of 1, namely F, wherein F is the upper-level equipment of H and can be expressed as F- > H;
k equipment line, finding equipment with the level of 1, namely J, wherein J is the upper-level equipment of K and can be expressed as J- > K;
m equipment row, finding equipment with the level of 1, namely D, wherein D is the upper-level equipment of M and can be expressed as D- > M;
3) device of discrimination level 3:
the I equipment line searches for equipment with the level of 2, namely G, wherein G is the upper-level equipment of I and can be represented as G- > I;
the L equipment row is used for searching equipment with the level of 2, namely the equipment is E, the E is the upper-level equipment of L and can be expressed as E- > L;
until the lowest level device (smart breaker) has found the corresponding upper level device.
One specific embodiment of the drawing of the core topology structure of the present invention:
according to the analysis result of the above-mentioned superior device of each level device, the topology structure diagram can be drawn.
The invention relates to a specific embodiment of perfect ammeter relation:
and continuously finishing the association of the electric meters and the intelligent breakers at the tail ends of the topology, and finding the intelligent breaker at the lowest level (the level of the tail end breaker may not be at the same level) corresponding to each electric meter transmission time line in the information summarizing data table, namely the intelligent breaker is the upper-level equipment of the electric meters.
And finally, integrating the core topological structure of the transformer area and the relation information of the electric meters, and drawing to form the complete topology of the transformer area.
The invention discloses a parallel identification method, which comprises the following specific embodiments:
the parallel identification method specifically comprises the following steps:
the method comprises the following steps that firstly, a master station selects a station area needing topology identification, sets the starting time X of equipment sending, sends an interval L and sends a topology identification parallel method instruction;
step two, the master station combs the number M of each table area device of the selected table area archive, and automatically sets the characteristic current sending time of all the devices at the interval of L from the time point X, X + L, X +2L, …, X + (M-1) × L;
step three, the master station finds out the maximum number N of each zone device of the selected zone file, wherein the maximum number N comprises an energy circuit breaker and a module, and the master station starts to identify and count down and prompts that a distance parallel identification method starts X in time setting; the X is the current time;
step four, the master station informs the corresponding meter and the intelligent circuit breaker of all the set sending time through the modular terminal in the selected range;
step five, when the time of the master station runs to X, the prompt of the master station is switched to 'parallel method identification is in progress, and the distance is N X L + 300';
step six, all equipment sends characteristic current according to preset time, and after the preset time is reached, the equipment is automatically triggered to switch the current in sequence;
step seven, the alternate collection of all intelligent circuit breakers and modular terminals is always in a detection state, if a characteristic current signal is detected, the current magnitude, the phase and the identification time are stored in the local equipment, active reporting events are set for the terminals and the intelligent circuit breakers, and the detected identification results are reported to a master station through the terminals;
step eight, continuously transmitting and identifying until all the equipment finishes transmitting;
step nine, when the parallel method is finished, the countdown of the master station is finished, the time stamp results recorded by all the terminals and the intelligent circuit breaker are reported to the master station, and the master station prompts that the topology identification parallel method is finished and the master station results are analyzed;
and step ten, the master station sorts and analyzes according to the time stamp, calculates to obtain the topological relation at the moment, and identifies the number T and the address of the failed equipment.
The invention discloses a specific embodiment of a serial identification method, which comprises the following steps:
the serial identification method mainly comprises the following steps:
step one, judging on the basis of a topology identification parallel method, if no identification failure equipment exists, directly jumping to the end of the process, ending, and if identification failure equipment exists, performing the next step;
step two, setting serial identification starting time Y, sending an interval K, clicking to send a topological identification serial method instruction, and setting a user change identification queue for the screened equipment by the master station according to the interval K from the time point Y;
step three, the master station starts to recognize countdown to prompt that the distance serial method starts to recognize Y in time setting;
y-current time;
step four, the master station informs the set characteristic current sending time to the equipment with the corresponding address through the terminal;
step five, finishing time setting of the equipment screened by all the parallel methods;
step six, when the time of the master station runs to Y, the prompt of the master station is switched to 'a serial identification method is in progress, and the distance T x K + 300' is ended;
step seven, all equipment sends the characteristic current according to the preset time, and after the preset time is reached, the equipment is automatically triggered to switch the current in sequence;
step eight, all the modular terminals and the intelligent circuit breakers adopt and always detect the characteristic current signals, if the characteristic current signals are detected, the current magnitude, the phase and the corresponding identification time are bound and stored in local equipment, and the terminals and the intelligent circuit breakers report the detected identification results to the master station through the terminals;
step nine, continuously transmitting and identifying until all the equipment finishes transmitting;
step ten, when the serial method is finished, the master station finishes countdown, the master station sorts and analyzes the storage records obtained by the parallel method and the serial method, and the current user variation relationship and the physical topology are obtained according to a time mark comparison algorithm;
and step eleven, informing operation and maintenance personnel to correct and update the wrong user variable relationship or to perform problem troubleshooting.
An application embodiment of the present invention:
the method comprises the steps that a fine platform area (4 branches, 13 meter boxes and 133 users) with a known topology is selected for test through the existing fusion terminal and intelligent circuit breaker equipment. In the power utilization information acquisition system main station test environment, the positioning method is deployed, multi-node power failure information in a meter box, a branch box, a transformer side and the like is simulated, the recommendation of power failure first-aid repair positions in the power utilization information acquisition system main station is realized, and the accuracy of power failure fault positioning can reach 100%.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (8)
1. A method for positioning power failure point of transformer area based on circuit breaker is characterized in that,
the method comprises the following steps:
firstly, a master station side of an electricity consumption information acquisition system acquires topological information and related information of equipment in a transformer area;
secondly, establishing a power failure positioning studying and judging model, wherein the power failure positioning studying and judging model comprises power failure positioning studying and judging of a meter box layer, power failure positioning studying and judging of a branch layer and power failure positioning studying and judging of a power distribution room or a power distribution box;
thirdly, when the master station receives a power failure event or breaker disconnection information reported by the transformer area convergence terminal or the breaker or the ammeter, after the power failure area is judged; starting to position and study and judge the power failure fault point by utilizing the power failure positioning study and judge model;
the fault point is in a meter box or a branch line segment or a branch box or a transformer outgoing line or a distribution room or a distribution box;
fourthly, outputting power failure fault point positioning information according to the power failure abnormal positioning studying and judging result;
fifthly, synchronously pushing the power supply service command system through the power utilization information acquisition system according to the power failure fault positioning information;
the topology information of the equipment in the transformer area is obtained by a transformer area topology identification method;
the station area topology identification method adopts a parallel identification method and/or a serial identification method, issues a characteristic current sending command to each monitoring unit in the station area, and realizes topology identification of a station area 'variable-line-box-table' topology relation and phase through sampling and detecting characteristic current signals by each level of sensing units at a branch box side and a transformer side and a modular terminal;
which comprises the following steps:
the method comprises the steps that firstly, a master station of a power utilization information acquisition system is used for collecting topology identification records reported by all devices, wherein the records comprise identification time; then, according to the switching time of each device set and issued by the main station, namely the characteristic current sending time, a topological information summary data table corresponding to the sending device and the identification device is formed;
according to the equipment characteristic current sending plan of the main station, continuously comparing the planned switching time of the equipment with the identification time in the topology identification record, and continuously increasing the content of a data table summarized by the topology information; the device comprises an ammeter;
secondly, after the work of establishing the topological information summary data table is completed, the levels of all the devices in the table are made clear; the process is synchronous with the establishing process of the table;
thirdly, confirming the direct superior equipment of each level of equipment according to the level sequence from top to bottom;
fourthly, drawing a core topological structure chart according to the analysis result of the third step;
fifthly, perfecting the relation of the electric meters; continuously finishing the association between the electric meters and the intelligent breakers at the topological tail ends, and finding the corresponding intelligent breaker at the lowest level of each electric meter transmission time line in the topological information summary data table, wherein the intelligent breaker is the superior equipment of the electric meter; finally, integrating the core topological structure of the transformer area and the relation information of the electric meters, and drawing to form a complete topology of the transformer area;
the parallel identification method identifies all the transformer areas at the same time, and n devices in all the transformer areas basically transmit characteristic currents at the same time;
the serial identification method identifies the devices which are selected by the parallel identification method and are missed to be identified due to time mark setting failure or communication failure or cross-station interference one by one, and can also identify the individual station areas or the user variation and the topology of the devices.
2. The method of claim 1, wherein the method further comprises the step of determining the location of the blackout point,
the meter box layer power failure positioning research and judgment is carried out through comprehensive research and judgment on a single meter and an intelligent circuit breaker at the inlet wire of a meter box, so as to determine whether a power failure fault point occurs in the meter box; the method specifically comprises the following steps:
firstly, marking the single table determined as effective power failure based on the existing single table power failure research and judgment algorithm;
checking the state of a breaker at the incoming line of the meter box;
when the incoming line breaker of the meter box is in a normal closed state, the meter box is marked with a single meter position for effective power failure, and the front-meter wiring of the single meter in the meter box is a power failure fault point to be checked;
fourthly, when the incoming line breaker of the meter box is in an off state, further judging the self electrification condition of the breaker;
the breaker is normally electrified, and the switch is off, so that the power failure fault point can be determined as the breaker;
sixthly, the breaker is not electrified, the power failure fault does not actually occur at the meter box, and the rush-repair work does not need to go to the site of the meter box.
3. The method of claim 2, wherein the location of the blackout point of the platform area based on the circuit breaker,
the branch layer power failure positioning research and judgment is carried out through an intelligent circuit breaker at a branch box, and whether a power failure fault point is in the branch box or a certain branch line is determined by combining information sent by an incomplete research and judgment of a meter box layer;
the method specifically comprises the following steps:
checking whether a meter box layer has a power failure positioning study, and determining a power failure fault point positioning upper delivery condition;
checking the state of the circuit breaker of the tail end branch box;
thirdly, when the breaker of the tail end branch box is in a normal closed state, the branch line corresponding to the meter box is sent to a fault point needing to be checked for on-site power failure emergency repair when power failure positioning information research and judgment is required;
fourthly, when the circuit breaker of the tail end branch box is in a disconnection state, further judging the self electrification condition of the circuit breaker;
the breaker is normally electrified, the switch is off, the power failure fault point is the breaker, and emergency repair personnel directly go to a branch box corresponding to the breaker to perform incoming line emergency repair work;
sixthly, the breaker is not electrified, and the actual position of the power failure fault does not occur below the branch box;
seventhly, repeating the research and judgment process, and finding a fault point by a research and judgment value, wherein the power failure fault point of the meter box layer in the first step is positioned and sent to be triggered by a breaker of a tail end branch box;
if the fault point is not found in the first-stage branch box, the power failure fault point is generated in a station zone branch layer, and the positioning research and judgment requirements are further sent upwards.
4. The method of claim 3, wherein the location of the blackout point of the platform area based on the circuit breaker,
the power failure positioning study and judgment of the power distribution room or the power distribution box is carried out by comprehensively studying and judging through a transformer outgoing line breaker and a station area fusion terminal, and whether a power failure fault point occurs in the power distribution room or not is determined by combining information which is not studied and judged and sent by a station area primary branch box breaker;
the method specifically comprises the following steps:
checking whether a branch layer power failure positioning study judges the positioning of a power failure fault point of the sixth kind of power failure and a sending condition;
checking the state of the circuit breaker at the outgoing line side of the transformer;
when the outgoing line breaker of the transformer is in a normal closed state, the state of the breaker of the first-stage branch box of the transformer area, which is sent by the power failure positioning information research and judgment requirement, is further called and tested;
fourthly, circulating for 5 times, and if the result shows that the state of the outgoing line breaker of the transformer is normal all the time and the calling and testing of the breaker of the primary branch box fails, positioning the power failure fault as the outgoing line position of the transformer;
judging the validity of information by further combining the transformer area fusion terminal when the outgoing line breaker of the transformer is in a disconnection or power failure state;
judge the fusion terminal in the room of joining in marriage with the breaker electrified state of being qualified for the next round of competitions, exist uncharged condition and then judge the fault point in joining in marriage the room, salvage personnel directly go to the platform district and join in marriage and carry out the work of salvageing of having a power failure in the room.
5. The method of claim 1, wherein the method further comprises the step of determining the location of the blackout point,
confirming the reliability of the equipment power failure information:
by calling up the voltage U of the device,
when the U meets any one of the following conditions, the power failure information reported by the equipment is considered to be effective
①U＝0；
②0＜U≤132V；
Calling for failure;
when the voltage value is larger than or equal to 132, the fusion terminal, the breaker or the electric meter is not powered off.
6. The method of any one of claims 1-5, wherein the method further comprises the step of determining the location of the blackout point,
the parallel identification method specifically comprises the following steps:
the method comprises the following steps that firstly, a master station selects a station area needing topology identification, sets the starting time X of equipment sending, sends an interval L and sends a topology identification parallel method instruction;
step two, the master station combs the number M of each table area device of the selected table area archive, and automatically sets the characteristic current sending time of all the devices at the interval of L from the time point X, X + L, X +2L, …, X + (M-1) × L;
step three, the master station finds out the maximum number N of each zone device of the selected zone file, wherein the maximum number N comprises an energy circuit breaker and a module, and the master station starts to identify and count down and prompts that a distance parallel identification method starts X in time setting; the X is the current time;
step four, the master station informs the corresponding meter and the intelligent circuit breaker of all the set sending time through the modular terminal in the selected range;
step five, when the time of the master station runs to X, the prompt of the master station is switched to 'parallel method identification is in progress, and the distance is N X L + 300';
step six, all equipment sends characteristic current according to preset time, and after the preset time is reached, the equipment is automatically triggered to switch the current in sequence;
step seven, the alternate collection of all intelligent circuit breakers and modular terminals is always in a detection state, if a characteristic current signal is detected, the current magnitude, the phase and the identification time are stored in the local equipment, active reporting events are set for the terminals and the intelligent circuit breakers, and the detected identification results are reported to a master station through the terminals;
step eight, continuously transmitting and identifying until all the equipment finishes transmitting;
step nine, when the parallel method is finished, the countdown of the master station is finished, the time stamp results recorded by all the terminals and the intelligent circuit breaker are reported to the master station, and the master station prompts that the topology identification parallel method is finished and the master station results are analyzed;
and step ten, the master station sorts and analyzes according to the time stamp, calculates to obtain the topological relation at the moment, and identifies the number T and the address of the failed equipment.
7. The method of claim 6, wherein the location of the blackout point of the platform area based on the circuit breaker,
the serial identification method mainly comprises the following steps:
step one, judging on the basis of a topology identification parallel method, if no identification failure equipment exists, directly jumping to the end of the process, ending, and if identification failure equipment exists, performing the next step;
step two, setting serial identification starting time Y, sending an interval K, clicking to send a topological identification serial method instruction, and setting a user change identification queue for the screened equipment by the master station according to the interval K from the time point Y;
step three, the master station starts to recognize countdown to prompt that the distance serial method starts to recognize Y in time setting;
y-current time;
step four, the master station informs the set characteristic current sending time to the equipment with the corresponding address through the terminal;
step five, finishing time setting of the equipment screened by all the parallel methods;
step six, when the time of the master station runs to Y, the prompt of the master station is switched to 'a serial identification method is in progress, and the distance T x K + 300' is ended;
step seven, all equipment sends the characteristic current according to the preset time, and after the preset time is reached, the equipment is automatically triggered to switch the current in sequence;
step eight, all the modular terminals and the intelligent circuit breakers adopt and always detect the characteristic current signals, if the characteristic current signals are detected, the current magnitude, the phase and the corresponding identification time are bound and stored in local equipment, and the terminals and the intelligent circuit breakers report the detected identification results to the master station through the terminals;
step nine, continuously transmitting and identifying until all the equipment finishes transmitting;
step ten, when the serial method is finished, the master station finishes countdown, the master station sorts and analyzes the storage records obtained by the parallel method and the serial method, and the current user variation relationship and the physical topology are obtained according to a time mark comparison algorithm;
and step eleven, informing operation and maintenance personnel to correct and update the wrong user variable relationship or to perform problem troubleshooting.
8. The method of claim 7, wherein the location of the blackout point of the station area is determined by a circuit breaker,
the power utilization information acquisition system is used for taking charge of overall control and scheduling, time distribution and sending interval setting, and carding and analyzing the collected time marks to obtain a real physical topology;
the master station is used for finishing related work including equipment asset entry, parameter configuration issuing, topology identification execution process control, reported information gathering and identification result study and judgment.
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| CN108303616B (en) * | 2017-12-29 | 2020-11-06 | 国网北京市电力公司 | Method and device for determining power failure information of transformer area |
| CN109995145B (en) * | 2019-05-15 | 2020-05-01 | 国网湖北省电力有限公司电力科学研究院 | Low-voltage distribution network fault active study and judgment method based on intelligent distribution transformer terminal |
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