CN113315235B - Multi-unit fault accurate positioning method adopting annular optical fiber communication - Google Patents
Multi-unit fault accurate positioning method adopting annular optical fiber communication Download PDFInfo
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- CN113315235B CN113315235B CN202110695420.6A CN202110695420A CN113315235B CN 113315235 B CN113315235 B CN 113315235B CN 202110695420 A CN202110695420 A CN 202110695420A CN 113315235 B CN113315235 B CN 113315235B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
According to the multi-unit fault accurate positioning method adopting annular optical fiber communication, the power unit stores the communication address and the communication baud rate of the power unit during normal communication, if the power unit and the main controller do not establish communication and then have communication faults, the power unit sends communication fault information to the main controller by using the stored communication address and the communication baud rate, and if the power unit and the main controller have faults in the normal communication process, the power unit sends the communication fault information to the main controller by using the current communication address and the communication baud rate, so that the identified power unit is the node with the faults. According to the multi-unit fault accurate positioning method, the main controller is used for identifying the fault power unit at the forefront end in the annular optical fiber communication loop, so that the accurate positioning of the fault node is realized, and the technical problem that faults caused by the fact that the power units are identified as the fault nodes after the existing fault nodes are difficult to troubleshoot is solved.
Description
Technical Field
The invention relates to an accurate positioning method for a power unit fault, in particular to an accurate positioning method for a multi-unit fault by adopting annular optical fiber communication.
Background
At present, the number of cascaded power electronic equipment grid connection is increased, the capacity of a single machine is increased, an angular connection mode is adopted, the number of used unit cascade connection is increased continuously, each power unit needs to be in optical fiber communication connection with a main controller, if each power unit uses 1 pair of optical fibers (1 receiving and 1 sending) to be connected with the main controller, necessary control and status signals are transmitted, the number of optical ports of the main controller is increased due to the optical fiber connection, so that in recent years, an annular optical fiber communication technology is emerging, namely, a communication loop can be formed by using 1 pair of optical fibers and N power units at the side of the main controller, each power unit is transmitted to the main controller in a time-sharing way, and the number of communication optical fibers is saved. As patent document CN2018210623619 entitled "a ring optical fiber communication control system for high voltage SVG", a technology for implementing communication between a main controller and a corresponding plurality of power units by using a ring optical fiber communication technology is disclosed.
However, the annular optical fiber communication effectively solves the problem of inaccurate fault positioning while the design of the controller is complicated, and particularly, when a certain node in an annular passage is disconnected or communication is in fault, all units in the whole annular passage are in fault, so that the master control cannot effectively judge that the position is firstly in question, and other units are only caused by the fact that the former communication is disconnected and additionally caused, and are not in fault truly.
In order to solve the problem of accurate positioning faults, when a certain node in a loop is broken by an optical fiber or has communication faults, after loop communication is interrupted, power units after the fault node still can continuously upload the main control according to normal communication parameters, so that the position of a specific communication fault can be judged.
Disclosure of Invention
In order to overcome the defects of the technical problems, the invention provides a multi-unit fault accurate positioning method adopting annular optical fiber communication.
According to the multi-unit fault accurate positioning method adopting annular optical fiber communication, a plurality of annular optical fiber communication loops are established between a main controller and power units of cascading type power electronic equipment, n power units are arranged in each annular optical fiber communication loop, and the n power units are respectively recorded as a power unit 1, a power unit 2, a power unit … … and a power unit n; the power unit is provided with a unit control board which is used for receiving and transmitting optical fiber communication data, controlling the operation of the power unit and detecting the state of the power unit; the method is characterized in that the method for accurately positioning the multi-unit faults comprises the following steps: the power unit stores the communication address and the communication baud rate of the power unit during normal communication, after the cascade power electronic equipment is electrified, if the power unit and the main controller do not establish communication and then have communication faults, the power unit sends communication fault information to the main controller by using the stored communication address and the communication baud rate, if the power unit and the main controller have faults in the normal communication process, the power unit sends the communication fault information to the main controller by using the current communication address and the communication baud rate, and the main controller identifies the power unit at the forefront end in the annular optical fiber loop in the power unit with the uploading faults, and the identified power unit is the faulty node.
The invention relates to a multi-unit fault accurate positioning method adopting annular optical fiber communication, which is characterized by comprising the following steps:
a) The annular optical fiber communication debugging is carried out, and after communication connection is established between adjacent power units in the same annular optical fiber communication loop and between the power units and a main controller of the cascading type power electronic equipment, normal annular optical fiber communication is established through debugging;
b) After the communication information is stored and normal annular optical fiber communication is established, the unit control board of each power unit stores the communication address and the communication baud rate of the power unit into the Flash memory so as to ensure that the communication address and the normal communication baud rate of the power unit are not lost after power failure;
c) Positioning a power unit fault, wherein the communication fault of an annular optical fiber communication loop in the cascading power electronic equipment is divided into a communication fault before power-on and a fault in a normal communication process;
fault location of communication faults that have occurred prior to power up is achieved by:
c-1-1), if the optical fiber or the unit control board is damaged in the transportation and installation processes of the equipment, the communication fault is caused before power-on in the first operation, and no communication address is allocated to the power units in the same annular optical fiber communication loop because the communication between the main controller and the unit control board is not established; after the equipment is electrified, the power unit after the fault node can not receive the communication signal from the main controller, so that the current communication fault is automatically identified;
c-1-2), communication information is acquired and uploaded, a power unit after a fault point acquires a communication address and a communication baud rate stored in a Flash memory of the power unit in a debugging stage, and the communication fault information is uploaded to a main controller according to a time-sharing multiplexing communication mode;
c-1-3) judging the fault point, wherein the main controller identifies the power unit positioned at the forefront end in the annular optical fiber communication loop from all power units transmitting communication faults, displays the power unit in the form of a communication fault node, and reminds maintenance personnel that a receiving port circuit of a unit control board of the power unit, a transmitting interface circuit of a previous power unit or an optical fiber between the power unit and the previous power unit has damage faults so as to carry out overhaul and maintenance;
the fault location of the fault in the normal communication process is realized by the following steps:
c-2-1) communication fault detection, wherein if communication faults occur in the process of normal communication between the main controller and the unit control boards of the power units, the power units after the fault nodes cannot receive communication signals from the main controller within a set time period, so that the current communication fault state is identified;
c-2-2) acquiring and uploading communication information, and after the power unit behind the fault node identifies a communication fault, uploading the communication fault information to the main controller by adopting a time-sharing multiplexing communication mode according to the communication address and the communication baud rate when the communication is normal at the previous moment;
c-2-3) judging the fault point, wherein the main controller identifies the power unit positioned at the forefront end in the annular optical fiber communication loop from all power units transmitting communication faults, displays the power unit in the form of a communication fault node, and reminds maintenance personnel that a receiving port circuit of a unit control board of the power unit, a transmitting interface circuit of a previous power unit or an optical fiber between the power unit and the previous power unit has damage faults so as to carry out overhaul and maintenance.
The invention relates to a multi-unit fault accurate positioning method adopting annular optical fiber communication, which comprises the following steps of: after the power unit behind the fault node recognizes a communication fault, firstly uploading 1 time of fault information to the main controller according to the acquired communication address and the communication baud rate, then judging whether the optical fiber signal receiving and the optical fiber signal sending of the power unit are normal, if the optical fiber signal receiving and the optical fiber signal sending are normal, no communication fault information is generated to the main controller, and if the optical fiber signal receiving is abnormal, the communication fault information is generated to the main controller; at this time, the main controller in step c-1-3) and step c-2-3) recognizes that the power unit having 2 or more times of reporting communication failure is a communication failure node.
According to the multi-unit fault accurate positioning method adopting annular optical fiber communication, the main control unit and the unit control board of the power unit are all FPGA control chips.
The beneficial effects of the invention are as follows: in the annular optical fiber communication loop established by the main controller and the power units of the cascading power electronic equipment, each power unit stores the communication address and the communication baud rate of the power unit under the condition of normal communication, and then if the equipment is powered on and fails, the power unit behind the failure point declares communication failure information to the main controller by using the stored communication address and the communication baud rate, and if the equipment fails in the normal communication process, the main controller declares communication failure by using the communication address and the communication baud rate distributed before the failure, thereby being beneficial to identifying the failure power unit at the forefront end in the annular optical fiber communication loop, realizing the accurate positioning of the failure node, and solving the technical problem that the failure caused by the fact that the power unit is identified as the failure node after the existing failure node is difficult to troubleshoot.
Drawings
FIG. 1 is a schematic diagram of a prior art ring fiber optic communication;
FIG. 2 is a system block diagram of a method for accurately locating multiple unit faults using ring optical fiber communications in accordance with the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1, a schematic diagram of existing ring optical fiber communication is provided, and as shown in fig. 2, a system block diagram of the multi-unit fault accurate positioning method adopting ring optical fiber communication is provided; the k annular optical fiber communication loops are established between the main controller and the power unit of the cascade power electronic equipment (such as a high-voltage reactive power compensation system SVG), and by taking a first annular optical fiber communication loop as an example, the optical fiber receiving end rx of the power unit 1 is connected with the optical fiber transmitting end tx_1 of the main controller through optical fiber communication, the optical fiber transmitting end tx of the power unit 1 is connected with the optical fiber receiving end rx of the power unit 2 through optical fiber communication, and so on, and the optical fiber transmitting end tx of the power unit n is connected with the optical fiber receiving end rx_of the main controller through optical fiber communication.
For the first annular optical fiber communication loop, after the existing communication mode is adopted, for example, optical fibers between the power unit 1 and the power unit 2 are damaged to cause communication faults, because the communication loop is disconnected, communication signals sent by the main controller cannot be received by the power unit 1, the power units 2 and … … and the power unit n after the optical fiber nodes are failed, and the power unit 1, the power units 2 and … … and the power unit n can report faults and are regarded as optical fiber communication faults, the main control can judge that a plurality of units are abnormal in communication and cannot be accurately positioned to the specific fault node positions, and great inconvenience is brought to the investigation and maintenance of the fault nodes.
As the equipment can be subjected to factory debugging before leaving the field, the normal operation of the cascading power electronic equipment is ensured. Therefore, after normal communication between the main controller and the same annular optical fiber communication loop is established, each power unit stores own communication address and communication baud rate into the Flash memory, so as to ensure that the own communication address and the normal communication baud rate are not lost after power failure.
If the optical fiber or the unit control board is damaged in the process of equipment transportation and installation, communication faults occur before power-on in the first operation, and because communication between the main controller and the unit control board is not established, the power units in the same annular optical fiber communication loop are not distributed with communication addresses, and then the communication addresses and the communication baud rates stored in the Flash memory in advance are needed.
Therefore, the fault location in which the communication fault has occurred before the power-up is achieved by:
c-1-1), detecting communication faults, and automatically identifying the communication faults as the power units behind the fault nodes can not receive communication signals from the main controller after the equipment is electrified;
c-1-2), communication information is acquired and uploaded, a power unit after a fault point acquires a communication address and a communication baud rate stored in a Flash memory of the power unit in a debugging stage, and the communication fault information is uploaded to a main controller according to a time-sharing multiplexing communication mode;
c-1-3) judging the fault point, wherein the main controller identifies the power unit positioned at the forefront end in the annular optical fiber communication loop from all power units transmitting communication faults, displays the power unit in the form of a communication fault node, and reminds maintenance personnel that a receiving port circuit of a unit control board of the power unit, a transmitting interface circuit of a previous power unit or an optical fiber between the power unit and the previous power unit has damage faults so as to carry out overhaul and maintenance.
If communication faults occur in the process that the main controller and the unit control boards of the power units normally communicate, fault positioning is realized through the following steps:
c-2-1) communication fault detection, wherein if communication faults occur in the process of normal communication between the main controller and the unit control boards of the power units, the power units after the fault nodes cannot receive communication signals from the main controller within a set time period, so that the current communication fault state is identified;
c-2-2) acquiring and uploading communication information, and after the power unit behind the fault node identifies a communication fault, uploading the communication fault information to the main controller by adopting a time-sharing multiplexing communication mode according to the communication address and the communication baud rate when the communication is normal at the previous moment;
c-2-3) judging the fault point, wherein the main controller identifies the power unit positioned at the forefront end in the annular optical fiber communication loop from all power units transmitting communication faults, displays the power unit in the form of a communication fault node, and reminds maintenance personnel that a receiving port circuit of a unit control board of the power unit, a transmitting interface circuit of a previous power unit or an optical fiber between the power unit and the previous power unit has damage faults so as to carry out overhaul and maintenance.
Wherein, the communication information acquisition and uploading in the steps c-1-2) and c-2-2) adopts the following method: after the power unit behind the fault node recognizes a communication fault, firstly uploading 1 time of fault information to the main controller according to the acquired communication address and the communication baud rate, then judging whether the optical fiber signal receiving and the optical fiber signal sending of the power unit are normal, if the optical fiber signal receiving and the optical fiber signal sending are normal, no communication fault information is generated to the main controller, and if the optical fiber signal receiving is abnormal, the communication fault information is generated to the main controller; at this time, the main controller in step c-1-3) and step c-2-3) recognizes that the power unit having 2 or more times of reporting communication failure is a communication failure node.
Therefore, the multi-unit fault accurate positioning method adopting annular optical fiber communication solves the problem that all units in the ring have communication faults due to the fact that a certain node fault occurs in the annular optical fiber communication, so that a master control cannot judge which unit node position has the communication fault.
Claims (2)
1. A multi-unit fault accurate positioning method adopting annular optical fiber communication is characterized in that a plurality of annular optical fiber communication loops are established between a main controller and power units of cascading power electronic equipment, n power units are arranged in each annular optical fiber communication loop, and the n power units are respectively marked as a power unit 1, a power unit 2, a power unit … … and a power unit n; the power unit is provided with a unit control board which is used for receiving and transmitting optical fiber communication data, controlling the operation of the power unit and detecting the state of the power unit; the accurate positioning method of the multi-unit fault comprises the following steps: the power unit stores the communication address and the communication baud rate of the power unit during normal communication, after the cascade power electronic equipment is electrified, if the power unit and the main controller do not establish communication and then have communication faults, the power unit sends communication fault information to the main controller by using the stored communication address and the communication baud rate, if the power unit and the main controller have faults in the normal communication process, the power unit sends the communication fault information to the main controller by using the current communication address and the communication baud rate, and the main controller identifies the power unit at the forefront end in the annular optical fiber loop in the power unit with the uploading faults, and the identified power unit is the node with faults;
the multi-unit fault accurate positioning method is characterized by comprising the following steps of:
a) The annular optical fiber communication debugging is carried out, and after communication connection is established between adjacent power units in the same annular optical fiber communication loop and between the power units and a main controller of the cascading type power electronic equipment, normal annular optical fiber communication is established through debugging;
b) After the communication information is stored and normal annular optical fiber communication is established, the unit control board of each power unit stores the communication address and the communication baud rate of the power unit into the Flash memory so as to ensure that the communication address and the normal communication baud rate of the power unit are not lost after power failure;
c) Positioning a power unit fault, wherein the communication fault of an annular optical fiber communication loop in the cascading power electronic equipment is divided into a communication fault before power-on and a fault in a normal communication process;
fault location of communication faults that have occurred prior to power up is achieved by:
c-1-1), if the optical fiber or the unit control board is damaged in the transportation and installation processes of the equipment, the communication fault is caused before power-on in the first operation, and no communication address is allocated to the power units in the same annular optical fiber communication loop because the communication between the main controller and the unit control board is not established; after the equipment is electrified, the power unit after the fault node can not receive the communication signal from the main controller, so that the current communication fault is automatically identified;
c-1-2), communication information is acquired and uploaded, a power unit after a fault point acquires a communication address and a communication baud rate stored in a Flash memory of the power unit in a debugging stage, and the communication fault information is uploaded to a main controller according to a time-sharing multiplexing communication mode;
c-1-3) judging the fault point, wherein the main controller identifies the power unit positioned at the forefront end in the annular optical fiber communication loop from all power units transmitting communication faults, displays the power unit in the form of a communication fault node, and reminds maintenance personnel that a receiving port circuit of a unit control board of the power unit, a transmitting interface circuit of a previous power unit or an optical fiber between the power unit and the previous power unit has damage faults so as to carry out overhaul and maintenance;
the fault location of the fault in the normal communication process is realized by the following steps:
c-2-1) communication fault detection, wherein if communication faults occur in the process of normal communication between the main controller and the unit control boards of the power units, the power units after the fault nodes cannot receive communication signals from the main controller within a set time period, so that the current communication fault state is identified;
c-2-2) acquiring and uploading communication information, and after the power unit behind the fault node identifies a communication fault, uploading the communication fault information to the main controller by adopting a time-sharing multiplexing communication mode according to the communication address and the communication baud rate when the communication is normal at the previous moment;
c-2-3) judging the fault point, wherein the main controller identifies the power unit positioned at the forefront end in the annular optical fiber communication loop from all power units transmitting communication faults, displays the power unit in the form of a communication fault node, and reminds maintenance personnel that a receiving port circuit of a unit control board of the power unit, a transmitting interface circuit of a previous power unit or an optical fiber between the power unit and the previous power unit has damage faults so as to carry out overhaul and maintenance;
the communication information acquisition and uploading described in the steps c-1-2) and c-2-2) adopts the following method: after the power unit behind the fault node recognizes a communication fault, firstly uploading 1 time of fault information to the main controller according to the acquired communication address and the communication baud rate, then judging whether the optical fiber signal receiving and the optical fiber signal sending of the power unit are normal, if the optical fiber signal receiving and the optical fiber signal sending are normal, no communication fault information is generated to the main controller, and if the optical fiber signal receiving is abnormal, the communication fault information is generated to the main controller; at this time, the main controller in step c-1-3) and step c-2-3) recognizes that the power unit having 2 or more times of reporting communication failure is a communication failure node.
2. The method for accurately positioning multiple unit faults by adopting annular optical fiber communication according to claim 1, wherein the method comprises the following steps of: and the main controller and the unit control boards of the power units are all FPGA control chips.
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| CN110601753A (en) * | 2019-09-02 | 2019-12-20 | 武汉东湖学院 | Method and device for reporting fault of optical fiber communication link |
| CN112924797A (en) * | 2021-02-07 | 2021-06-08 | 东方日立(成都)电控设备有限公司 | Fault positioning method and system for high-voltage frequency conversion system |
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| CN107026691B (en) * | 2017-04-14 | 2020-02-11 | 云南电网有限责任公司电力科学研究院 | Method and system for automatically isolating power distribution optical fiber ring network fault |
| CN111699637B (en) * | 2018-02-09 | 2023-05-30 | 瑞典爱立信有限公司 | Method and apparatus for fiber optic line fault determination |
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| CN112924797A (en) * | 2021-02-07 | 2021-06-08 | 东方日立(成都)电控设备有限公司 | Fault positioning method and system for high-voltage frequency conversion system |
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