CN110707811B - Fault node positioning method and device of high-voltage multi-converter system - Google Patents
Fault node positioning method and device of high-voltage multi-converter system Download PDFInfo
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- CN110707811B CN110707811B CN201910921820.7A CN201910921820A CN110707811B CN 110707811 B CN110707811 B CN 110707811B CN 201910921820 A CN201910921820 A CN 201910921820A CN 110707811 B CN110707811 B CN 110707811B
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Abstract
The invention provides a fault node positioning method and a fault node positioning device of a high-voltage multi-converter system, wherein the method comprises the following steps: receiving a fault positioning message from the converter; the fault positioning message comprises a node address of the converter and message duration; and positioning the fault current transformer according to the fault positioning message. And the main controller in the high-voltage multi-converter system is connected with a plurality of converters through a one-way data transmission annular link. The invention can solve the problems that after the MMCS of the multi-module converter system has communication link failure, specific failure nodes are difficult to locate and the maintenance time is long when the nodes are checked one by one.
Description
Technical Field
The invention relates to the technical field of pressure measurement, in particular to an interlayer pressure measurement device and method based on a metallized film capacitor.
Background
The multi-module converter system (MMCS) is widely applied to the fields of high-voltage SVG, high-voltage frequency converters, flexible direct-current transmission and the like. In the prior art, the main controller and a single converter module generally adopt a one-to-one communication mode, which results in more light interfaces of the main controller, greatly increases the optical fiber consumption of the MMCS, and is not beneficial to cost reduction and efficiency improvement of the MMCS.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a fault node positioning method and a fault node positioning device for a high-voltage multi-converter system, which can solve the problems that after a communication link fault occurs in a multi-module converter system MMCS, specific fault nodes are difficult to position and the maintenance time is long when the fault nodes are checked one by one, and shorten the mean repair time MTTR of field maintenance, thereby improving the reliability of the MMCS.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a method for locating a fault node of a high-voltage multi-converter system based on a main controller, including:
receiving a fault positioning message from the converter; the fault positioning message comprises a node address of the converter and message duration;
and positioning the fault current transformer according to the fault positioning message.
And the main controller in the high-voltage multi-converter system is connected with a plurality of converters through a one-way data transmission annular link.
Preferably, the locating the fault current transformer according to the fault locating message includes:
selecting the message duration with the shortest message duration in a fault message set consisting of fault message sets sent by all the converters;
and positioning the fault current transformer according to the current transformer corresponding to the message with the shortest message duration in the fault message set.
Preferably, the message duration is the sum of the waiting duration of the converter and the processing duration of the fault locating message, and the waiting duration is the message duration of the last converter.
The invention also provides a fault node positioning method of the high-voltage multi-converter system based on the converter end, which comprises the following steps:
judging whether downlink data sent by the main controller is received within a preset time by using a step delay method;
if not, generating a fault positioning message and sending the fault positioning message to the main controller; the fault positioning message comprises a node address of the converter and message duration, and the fault positioning message is used for positioning the fault converter by the main controller according to the fault positioning message.
A main controller in the high-voltage multi-converter system is connected with a plurality of converters in a unidirectional annular link mode.
Preferably, the message duration of the current converter is the sum of the waiting duration and the processing duration of the fault locating message, and the waiting duration is the message duration of the last converter.
In a second aspect, the present invention provides a fault node locating device of a high-voltage multi-converter system based on a main controller terminal, the device comprising:
the receiving unit is used for receiving the fault positioning message from the converter; the fault positioning message comprises a node address of the converter and message duration;
and the positioning unit is used for positioning the fault current transformer according to the fault positioning message.
And the main controller in the high-voltage multi-converter system is connected with a plurality of converters through a one-way data transmission annular link.
Preferably, the positioning unit includes:
the selection module is used for selecting the message duration with the shortest message duration in the fault message set consisting of the fault message sets sent by the converters;
and the positioning module is used for positioning the fault current transformer according to the current transformer corresponding to the message with the shortest message duration in the fault message set.
Preferably, the message duration is the sum of the waiting duration of the converter and the processing duration of the fault locating message, and the waiting duration is the message duration of the last converter.
The invention provides a fault node positioning device of a high-voltage multi-converter system based on a converter end, which comprises:
the judging unit is used for judging whether downlink data sent by the main controller is received within preset time by using a step delay method;
the message generating unit is used for generating a fault positioning message and sending the fault positioning message to the main controller; the fault positioning message comprises a node address of the converter and message duration, and the fault positioning message is used for positioning the fault converter by the main controller according to the fault positioning message.
And the main controller in the high-voltage multi-converter system is connected with a plurality of converters through a one-way data transmission annular link.
Preferably, the message duration of the current converter is the sum of the waiting duration and the processing duration of the fault locating message, and the waiting duration is the message duration of the last converter.
In a third aspect, the present invention provides an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method for locating a fault node of a high voltage multi-converter system when executing the program.
In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of fault node location for a high voltage multi-converter system.
From the above description, it can be known that, according to the fault node positioning method and device of the high-voltage multi-converter system provided by the invention, after the ring-shaped communication link is interrupted, the interrupted fault position is rapidly judged through the subsequent intact converter nodes in the link, and after a step delay waiting arbitration, the fault positioning information is transmitted to the main node and displayed by the most front node.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first flowchart illustrating a fault node locating method of a high-voltage multi-converter system according to an embodiment of the present invention;
fig. 2 is a flow chart illustrating a method 200 for locating a fault node of a high voltage multi-converter system according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a fault node locating method of the high-voltage multi-converter system according to the embodiment of the invention;
FIG. 4 is a schematic flow chart of a fault node locating method for a high voltage multi-converter system in an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a data structure and flow of a polling mode in a ring communication architecture in an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a downlink command of a master node and received uplink data in a data period during normal operation in a specific application example of the present invention;
FIG. 7 is a diagram illustrating a receiving failure detection policy of a slave node in an exemplary embodiment of the present invention;
fig. 8 is a first schematic structural diagram of a fault node locating device of a high-voltage multi-converter system in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a fault node locating device of a high-voltage multi-converter system in an embodiment of the invention;
fig. 10 is a schematic structural diagram of a fault node locating device of a high-voltage multi-converter system in an embodiment of the invention;
fig. 11 is a schematic structural diagram of an electronic device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In view of the related needs in the prior art for improving the safety and usability of the current captcha system, an embodiment of the present invention provides a specific implementation of a fault node locating method for a high-voltage multi-converter system based on a main controller, and referring to fig. 1, the method specifically includes the following steps:
step 100: and receiving a fault positioning message from the converter.
It can be understood that the fault location message includes a node address of the converter and a message duration. A converter is an electrical device that changes the voltage, frequency, number of phases, and other electrical quantities or characteristics of a power supply system. Besides the main circuit (rectifier circuit, inverter circuit, ac conversion circuit and dc conversion circuit respectively), the converter also needs a trigger circuit (or called drive circuit) for controlling the on/off of the power switch element and a control circuit for regulating and controlling the electric energy. The trigger circuit of the converter comprises a pulse generator and a pulse output device, wherein the pulse generator generates a pulse with a certain frequency, a certain width or a certain phase according to the requirement of a control signal, and the pulse output device amplifies the level of the pulse into a driving signal suitable for the power switch element in the converter.
Step 200: and positioning the fault current transformer according to the fault positioning message.
The main controller receives a fault positioning message from the converter and positions the fault converter according to the fault positioning message, wherein the fault positioning message comprises a node address of the converter and message duration. In addition, the downlink data refers to data sent by the main controller to the converter in the ring link.
It is understood that the main controller in the high voltage multi-converter system in steps 100 and 200 is connected to the plurality of converters in a ring link for unidirectional data transmission. Compared with a one-to-one communication mode of the main controller and a single converter module, the annular communication structure can not only obviously reduce the resources such as the number of optical fiber interfaces of the main controller, but also greatly reduce the optical fiber consumption of the MMCS, and is beneficial to realizing the cost reduction and the efficiency improvement of the MMCS.
In steps 100 to 200, the message durations in the fault locating messages sent by each converter are different, and the master controller selects the converter node address corresponding to the message duration with the shortest time from the received fault message set, so that the fault converter node address can be determined, that is, the previous converter node of the converter node corresponding to the message duration with the shortest time in the fault message set is the fault node.
From the above description, it can be known that, according to the fault node positioning method of the high-voltage multi-converter system provided by the invention, after the ring-shaped communication link is interrupted, the interrupted fault position is rapidly judged through the subsequent intact converter nodes in the link, and after a step delay waiting arbitration, the fault positioning information is transmitted to the main node and displayed by the most front node.
In one embodiment, referring to fig. 2, step 200 comprises:
step 201: and selecting the message duration with the shortest message duration in the fault message set consisting of the fault message sets sent by the converters.
In the application of the multi-module converter system MMCS, in order to monitor the operation condition of the converter module, complete state information including a fault state of each element inside the converter module, a voltage value and a temperature value of the converter module, and the like, needs to be uploaded as much as possible. Therefore, the length of the data information code uploaded to the main controller by the converter module is generally far longer than the length of the command data information code issued to the converter module by the main controller. Under the ring communication, the information of each converter module in the link can only be transmitted in sequence by using a common communication line, the time consumption is long, and the control effect is poor due to the conventional transceiving mode. Based on the analysis, in order to reduce the time overhead of single communication, a method that the main controller polls the states of the converter modules is adopted, namely in a single communication period, only one converter module inquired by the main controller returns upload data information to the main controller, and the main controller changes different inquiry target addresses in each communication period so as to obtain the data information of all the modules in a link. It can be understood that the polling method is adopted to shorten the single communication period, after receiving a piece of converter information, the main controller can immediately adjust the control signal according to the received information and send the control signal to all the converter modules in the link, thereby greatly shortening the control step length and improving the control precision.
Step 202: and positioning the fault current transformer according to the current transformer corresponding to the message with the shortest message duration in the fault message set.
In an embodiment, the message duration is the sum of the waiting duration of the current transformer and the processing duration of the fault locating message, and the waiting duration is the message duration of the previous current transformer.
From the above description, it can be known that, according to the fault node positioning method of the high-voltage multi-converter system provided by the invention, after the ring-shaped communication link is interrupted, the interrupted fault position is rapidly judged through the subsequent intact converter nodes in the link, and after a step delay waiting arbitration, the fault positioning information is transmitted to the main node and displayed by the most front node.
An embodiment of the present invention provides a specific implementation of a fault node positioning method for a high-voltage multi-converter system based on a converter terminal, and referring to fig. 3, the method specifically includes the following steps:
step 300: and judging whether downlink data sent by the main controller is received within a preset time by using a step delay method.
Specifically, after the step delay waiting, the reception fault judgment is started, and the message (including the normal message and the fault location message) with the specified data format cannot be received within the preset time, or the fault location message containing the own node address code is sent backwards after the message with the specified data format is received but the verification is wrong.
In addition, the downlink data in step 300 refers to data sent by the master controller to the converter in the ring link.
Step 400: and generating a fault positioning message and sending the fault positioning message to the main controller.
It can be understood that, when the determination result in the step 300 is that the downlink data sent by the main controller is not received within the preset time, the converter generates a fault location message and sends the fault location message to the main controller. The fault positioning message comprises a node address of the converter and message duration, and the fault positioning message is used for the main controller to position the fault converter according to the fault positioning message.
From the above description, it can be known that, according to the fault node positioning method of the high-voltage multi-converter system provided by the invention, after the ring-shaped communication link is interrupted, the interrupted fault position is rapidly judged through the subsequent intact converter nodes in the link, and after a step delay waiting arbitration, the fault positioning information is transmitted to the main node and displayed by the most front node.
In an embodiment, the current converter message duration is the sum of a waiting duration and a fault locating message processing duration, and the waiting duration is the message duration of the last converter.
It can be understood that the message durations in the fault locating messages sent by each converter are different, and the master controller selects the converter node address corresponding to the message duration with the longest time from the received fault message set, so that the fault converter node address can be determined, that is, the node in the downlink direction, which is the previous converter node to the converter node corresponding to the message duration with the longest time in the fault message set, is the node with the fault.
Since data information is transmitted in sequence at each node (a plurality of converter nodes and a master controller) in the circular link, the link delay forwarded by each single slave node processor is assumed to be tret(ii) a When the circular link fails, t is a determination timechkWhether a communication failure occurs can be determined; suppose the length of the fault location message is tft_pac(ii) a Taking into account the forwarding delay tretAnd a determination time tchkRelative to the time length t of the fault messageft_pacSo small that the jth node needs to wait at least 2(j-1) x tft_pacAnd the receiving communication fault check can be started at the rear part, so that the fault locating message of the previous node is repeatedly sent after the starting detection fault time of each node is at the fault locating message arrival time, and the subsequent node can be ensured to receive a complete fault message.
From the above description, it can be known that, according to the fault node positioning method of the high-voltage multi-converter system provided by the invention, after the ring-shaped communication link is interrupted, the interrupted fault position is rapidly judged through the subsequent intact converter nodes in the link, and after a step delay waiting arbitration, the fault positioning information is transmitted to the main node and displayed by the most front node.
To further illustrate the present solution, the present invention provides a specific application example of the fault node location method of a high-voltage multi-converter system, and the specific application example specifically includes the following contents, see fig. 4.
The data structure and flow of polling mode in the ring communication architecture is shown in fig. 5. It should be noted that, the master node here refers to a master controller; the slave node refers to a shunt. Each slave node in the ring link has a fixed and unique address, which can be realized by a dial switch on a hardware board. Taking 5 slave nodes in a link as an example, the address code of each slave node and the state of the dial switch on the corresponding hardware board are shown in table 1.
TABLE 1 Address code of each slave node and state table of dial switch on corresponding hardware board card
| Slave node | Address code (bit)/toggle state (S3, S2, S1) |
| |
001 |
| Slave node 2 | 010 |
| Slave node 3 | 011 |
| Slave node 4 | 100 |
| Slave node 5 | 101 |
| Unlawful | 000，110，111 |
And S0, judging whether the ring link has the uplink data of the converter.
And S1, judging whether the ring link has the uplink data of the converter by the main controller by using a polling method.
Because the length of the uplink data is longer than that of the downlink data, the valve is controlled to sequentially inquire the state of each slave node in the link in each communication cycle by adopting a polling method. The mode that the main node finds that the link has communication abnormity: no normal uplink data is returned; as shown in the data link of fig. 5, when the ith segment of the link fails (including any one of the transmitting optical port of the slave node i, the optical fiber i and the receiving optical port of the slave node i +1 fails), the control command of the correct master controller cannot be resolved from the (i + 1) th slave node to the nth slave node in the link; if the query slave nodes are the 1 st to the ith nodes, the return state information of the modules cannot be correctly transmitted due to the link interruption; if the query slave nodes are the (i + 1) th node to the n-th node, the queried node does not know the queried node and does not return state information. Therefore, after the link communication failure occurs, the uplink data information returned by the slave node will be lost on the communication link, i.e. the master node cannot detect the correct uplink data. The timing sequence of the downlink data command and the received uplink data of the master node during a polling period is shown in fig. 6.
And S2, generating a fault positioning message by the current transformer and sending the fault positioning message to the main controller.
Specifically, the slave nodes in the link check whether communication faults occur in the slave nodes by a step delay method, and the nodes meeting the conditions transmit fault positioning messages to the bus: assuming that the ith node is a fault occurrence point, in order to perform fault location, only the fault location message generated by the foremost node of the fault link on the bus, i.e., the node i +1, should be used. Since data information is passed through each node in the link in turn, it is assumed that the link delay forwarded by each individual slave node processor is denoted tret(ii) a When a link failure occurs, t is a determination timechkWhether a communication failure occurs can be determined; 3) suppose the length of the fault location message is tft_pac(ii) a Taking into account the forwarding delay tretAnd a determination time tchkRelative to the time length t of the fault messageft_pacIs small, so thatThe jth node at least needs to wait for 2(j-1) x tft_pacAnd the receiving communication fault check can be started at the rear part, so that the fault locating message of the previous node is repeatedly sent after the starting detection fault time of each node is at the fault locating message arrival time, and the subsequent node can be ensured to receive a complete fault message. Taking the example that the link contains 5 slave nodes, the step delays of nodes 1-5 waiting for acknowledgement are {0, 2t }ft_pac、4tft_pac、6tft_pac、8tft_pac}. If the fault positioning message of the preorder node is received in the step delay waiting for confirmation, the message is immediately forwarded and transmitted to the subsequent node; if the fault locating message of the preorder node is not received after the step delay waiting for confirmation is finished, the node sends the fault locating message of the node to the bus, and continuously and repeatedly sends the fault locating message.
It should be noted that, for a single slave node, it is possible to detect its own reception information error, and it is not possible to detect its own transmission error. The specific implementation method comprises the following steps: after step delay waiting, starting receiving fault judgment; after the start of the judgment, at a predetermined time tchkIf the message with the specified data format is not received (including a normal message and a fault positioning message) or if the message with the specified data format is received but the check is wrong, the message is judged to be the first fault communication node on the link, and the fault positioning message containing the address code of the node is sent backwards to declare that the data received by the message is wrong. The flow strategy is shown in fig. 7.
And S3, the main controller positions the fault current transformer according to the fault positioning message.
Specifically, t after occurrence of a link failuretot，ttot＞tret+tchk+2(n-1)tft_pacCan take ttot＝2ntft_pacThe valve control may then begin detecting fault location messages. The fault positioning message contains address information of the node i +1, and operation and maintenance personnel can check three specific positions of a transmitting optical port of the node i, the optical fiber i and a receiving optical port of the node i +1 according to the fault positioning message, so that the operation and maintenance personnel can accurately check the three specific positionsAnd positioning the fault element for replacement. Take a link with 5 slave nodes as an example, ttot＞tchk+8tft_pac. The fault positioning message contains address information of the node i +1, and operation and maintenance personnel can check three specific positions of a transmitting optical port of the node i, the optical fiber i and a receiving optical port of the node i +1 according to the fault positioning message, so that a fault element can be accurately positioned and replaced.
From the above description, it can be known that, according to the fault node positioning method of the high-voltage multi-converter system provided by the invention, after the ring-shaped communication link is interrupted, the interrupted fault position is rapidly judged through the subsequent intact converter nodes in the link, and after a step delay waiting arbitration, the fault positioning information is transmitted to the main node and displayed by the most front node.
Based on the same inventive concept, the embodiment of the present application further provides a fault node locating device of a high-voltage multi-converter system, which can be used to implement the method described in the above embodiment, such as the following embodiments. Because the principle of the fault node locating device of the high-voltage multi-converter system for solving the problem is similar to the fault node locating method of the high-voltage multi-converter system, the implementation of the fault node locating device of the high-voltage multi-converter system can refer to the implementation of the fault node locating method of the high-voltage multi-converter system, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. While the system described in the embodiments below is preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
An embodiment of the present invention provides a specific implementation manner of a fault node positioning device of a high-voltage multi-converter system, which is capable of implementing a fault node positioning method of the high-voltage multi-converter system, and referring to fig. 8, the fault node positioning device of the high-voltage multi-converter system based on a main controller end specifically includes the following contents:
a receiving unit 10, configured to receive a fault location message from the converter; the fault positioning message comprises a node address of the converter and message duration;
and the positioning unit 20 is configured to position the fault current transformer according to the fault positioning message.
The main controller in the high-voltage multi-converter system is connected with the converters in a unidirectional annular link;
the first judging unit is specifically configured to judge whether there is uplink data of the converter in the ring link by using a polling method.
Preferably, referring to fig. 9, the positioning unit 20 includes:
a selecting module 201, configured to select a message duration with a shortest message duration in a fault message set composed of fault message sets sent by the converters;
and the positioning module 202 is configured to position the fault current transformer according to the current transformer corresponding to the message with the shortest message duration in the fault message set.
An embodiment of the present invention further provides a specific implementation manner of a fault node positioning device of a high-voltage multi-converter system, which is capable of implementing a fault node positioning method of the high-voltage multi-converter system, and referring to fig. 10, the fault node positioning device of the high-voltage multi-converter system based on a converter end specifically includes the following contents:
a determining unit 30, configured to determine whether downlink data sent by the main controller is received within a preset time by using a step delay method;
a message generating unit 40, configured to generate a fault location message and send the fault location message to the master controller; the fault positioning message comprises a node address of the converter and message duration, and the fault positioning message is used for positioning the fault converter by the main controller according to the fault positioning message.
The main controller in the high-voltage multi-converter system is connected with the converters in a unidirectional annular link;
preferably, the message duration is the sum of the waiting duration of the converter and the processing duration of the fault locating message, and the waiting duration is the message duration of the last converter.
From the above description, it can be known that, according to the fault node locating device of the high-voltage multi-converter system provided by the invention, after the ring-shaped communication link is interrupted, the interrupted fault position is rapidly judged through the subsequent intact converter nodes in the link, and after a step delay waiting arbitration, the fault locating information is transmitted to the main node and displayed by the most front node.
An embodiment of the present application further provides a specific implementation manner of an electronic device capable of implementing all steps in the fault node location method of the high-voltage multi-converter system in the foregoing embodiment, and referring to fig. 11, the specific implementation manner includes the following steps:
a processor (processor)1201, a memory (memory)1202, a communication Interface 1203, and a bus 1204;
the processor 1201, the memory 1202 and the communication interface 1203 complete communication with each other through the bus 1204; the communication interface 1203 is configured to implement information transmission between related devices, such as a server-side device, a recording device, and a client device.
The processor 1201 is configured to invoke a computer program in the memory 1202, and the processor executes the computer program to implement all the steps in the fault node locating method of the high-voltage multi-converter system in the above embodiment, for example, the processor executes the computer program to implement the following steps:
step 100: and judging and receiving a fault positioning message from the converter.
Step 200: and positioning the fault current transformer according to the fault positioning message.
Step 300: and judging whether downlink data sent by the main controller is received within a preset time by using a step delay method.
Step 400: and generating a fault positioning message and sending the fault positioning message to the main controller.
From the above description, it can be known that, in the electronic device in the embodiment of the present application, after the ring-shaped communication link is interrupted, the interrupted fault position is quickly determined by the subsequent intact converter node in the link, and after a step delay waiting arbitration, the fault location information is transmitted to the master node by the most front node and displayed.
Embodiments of the present application further provide a computer-readable storage medium capable of implementing all steps in the fault node location method of the high-voltage multi-converter system in the above embodiments, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, implements all steps of the fault node location method of the high-voltage multi-converter system in the above embodiments, for example, when the processor executes the computer program, the processor implements the following steps:
step 100: and judging and receiving a fault positioning message from the converter.
Step 200: and positioning the fault current transformer according to the fault positioning message.
Step 300: and judging whether downlink data sent by the main controller is received within a preset time by using a step delay method.
Step 400: and generating a fault positioning message and sending the fault positioning message to the main controller.
As can be seen from the above description, in the computer-readable storage medium in the embodiment of the present application, after the ring communication link is interrupted, the interrupted fault location is quickly determined by the subsequent intact converter nodes in the link, and after a step delay is performed to wait for the arbitration, the failure location information is transmitted to the master node by the most front node and is displayed.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Although the present application provides method steps as in an embodiment or a flowchart, more or fewer steps may be included based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or client product executes, it may execute sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the embodiments or methods shown in the figures.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A fault node positioning method of a high-voltage multi-converter system is characterized in that a main controller in the high-voltage multi-converter system is connected with a plurality of converters through a ring link for unidirectional data transmission, and the fault node positioning method comprises the following steps:
receiving a fault positioning message from the converter; the fault positioning message comprises a node address of the converter and message duration;
positioning the fault current transformer according to the fault positioning message;
the message duration is the sum of the waiting duration of the current transformer and the processing duration of the fault positioning message, and the waiting duration is the message duration of the previous current transformer.
2. The method according to claim 1, wherein the locating the fault current transformer according to the fault locating message comprises:
selecting the message duration with the shortest message duration in a fault message set consisting of fault message sets sent by all the converters;
and positioning the fault current transformer according to the current transformer corresponding to the message with the shortest message duration in the fault message set.
3. A fault node positioning method of a high-voltage multi-converter system is characterized in that a main controller in the high-voltage multi-converter system is connected with a plurality of converters in a unidirectional annular link mode, and the fault node positioning method comprises the following steps:
judging whether downlink data sent by the main controller is received within a preset time by using a step delay method;
if not, generating a fault positioning message and sending the fault positioning message to the main controller; the fault positioning message comprises a node address of the converter and message duration, and the fault positioning message is used for positioning the fault converter by the main controller according to the fault positioning message.
4. The method according to claim 3, wherein the current converter message duration is the sum of a waiting duration and a fault location message processing duration, and the waiting duration is the message duration of the previous converter.
5. The utility model provides a fault node positioner of high pressure multi-converter system which characterized in that, main control unit and a plurality of converters in the high pressure multi-converter system are the annular link connection of one-way data transmission, fault node positioner includes:
the receiving unit is used for receiving the fault positioning message from the converter; the fault positioning message comprises a node address of the converter and message duration;
the positioning unit is used for positioning the fault current transformer according to the fault positioning message;
the message duration is the sum of the waiting duration of the current transformer and the processing duration of the fault positioning message, and the waiting duration is the message duration of the previous current transformer.
6. The fault node locating device according to claim 5, wherein the locating unit comprises:
the selection module is used for selecting the message duration with the shortest message duration in the fault message set consisting of the fault message sets sent by the converters;
and the positioning module is used for positioning the fault current transformer according to the current transformer corresponding to the message with the shortest message duration in the fault message set.
7. The utility model provides a fault node positioner of high pressure multi-converter system which characterized in that, main control unit and a plurality of converters in the high pressure multi-converter system are the annular link connection of one-way data transmission, fault node positioner includes:
the judging unit is used for judging whether downlink data sent by the main controller is received within preset time by using a step delay method;
the message generating unit is used for generating a fault positioning message and sending the fault positioning message to the main controller; the fault positioning message comprises a node address and message duration of the converter, and the fault positioning message is used for the main controller to position the fault converter according to the fault positioning message;
the message duration is the sum of the waiting duration of the current transformer and the processing duration of the fault positioning message, and the waiting duration is the message duration of the previous current transformer.
8. The apparatus according to claim 7, wherein the current converter message duration is the sum of a waiting duration and a fault location message processing duration, and the waiting duration is the message duration of the previous converter.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method of fault node localization for a high voltage multi-converter system according to any of claims 1 to 4.
10. A computer-readable storage medium, having stored thereon a computer program, the computer program, when being executed by a processor, is adapted to carry out the steps of the method of fault node location of a high voltage multi-converter system according to any of the claims 1-4.
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