CN113722883A - Intelligent substation secondary circuit fault positioning method - Google Patents
Intelligent substation secondary circuit fault positioning method Download PDFInfo
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Abstract
The invention provides a method for positioning faults of a secondary circuit of an intelligent substation, which belongs to the technical field of power grid dispatching maintenance units and relay protection operation and maintenance management, and aims at the problems of complex association relation of process layer equipment, abstract transmitted digital signals, high operation and maintenance difficulty, low efficiency and the like.
Description
Technical Field
The invention relates to a power grid fault positioning method, in particular to a multi-branch tree-based visual fault positioning method for a secondary circuit of an intelligent substation.
Background
The IEC61850 standard is the only global universal standard in the field of power system automation. The standardization of engineering operation of the intelligent substation is realized through standard realization. The engineering implementation of the intelligent substation becomes standard, uniform and transparent. No matter which system integrator establishes the intelligent substation project, the structure and layout of the whole substation can be known through an SCD (system configuration) file, and the method has an irreplaceable effect on the development of the intelligent substation.
The characteristics of IEC61850 include: firstly, defining an information hierarchical structure of a transformer substation; the communication network of the transformer substation and the draft of the IEC61850 standard of the system protocol propose the concept of information layering in the transformer substation, divide the communication system of the transformer substation into 3 layers, namely a transformer substation layer, a bay layer and a process layer, and define communication interfaces between the layers. Secondly, an object-oriented data modeling technology is adopted; the IEC61850 standard defines a client/server based structured data model using object oriented modeling techniques. Each IED contains one or more servers, each of which in turn contains one or more logical devices. The logical device contains logical nodes that contain data objects. Data objects are named instances of common data classes that are made up of data attributes. From a communication perspective, the IED also plays the role of a client. Any one client may communicate with the server to access the data object through an Abstract Communication Service Interface (ACSI). Self-description of data; the standard defines a naming rule for establishing an object name by adopting an equipment name, a logic node name, an instance number and a data class name; with object-oriented methods, communication services between objects are defined, such as communication services to obtain and set object values, communication services to obtain lists of object names, services to obtain lists of data object values, and the like. The object-oriented data self-description describes the data per se at the data source, the data transmitted to the receiver has self description, and the work of engineering physical quantity correspondence, scale conversion and the like on the data is not needed. Because the data is provided with the description, the data can be transmitted without being limited by the predefinition, and the management and maintenance work of the data is simplified. Network independence; the IEC61850 standard summarizes the communication services necessary for information transmission within a substation, and designs an Abstract Communication Service Interface (ACSI) that is independent of the network and application layer protocols employed. In IEC61850-7-2, a model of the communication services that the standard compliant server has to provide is established, including a server model, a logical device model, a logical node model, a data model and a data set model. The client is mapped by a private communication service map (SCSM) to the specific protocol stack employed, such as a Manufacturing Message Specification (MMS) or the like, via the ACSI. The IEC61850 standard uses the ACSI and SCSM technologies to solve the contradiction between the stability of the standard and the future network technology development, i.e. only the SCSM needs to be changed when the network technology is developed, and the ACSI does not need to be modified.
In the intelligent substation, the secondary circuit is changed into a fiber digital transmission mode from a traditional cable signal, and the digital signal and the virtual circuit replace a traditional voltage and current signal to be used as a transmission mode of signals between process layer devices in the intelligent substation. In order to solve the problems of non-transparent information transmission, inconvenient defect searching and the like existing after the secondary information of the intelligent substation is transmitted by adopting optical fibers, a physical information node model needs to be built at a process layer, and a physical topology intelligent substation secondary circuit early warning and fault diagnosis scheme for secondary equipment communication is built, so that fault diagnosis of the intelligent substation secondary circuit is realized. However, when fault location is performed on the secondary circuit of the intelligent substation in the prior art, at least the problems exist: the intelligent substation process layer transmits digital signals by using the optical fibers and the process layer switch as main transmission carriers through the process layer network among the devices so as to achieve the purpose of monitoring and controlling primary devices. However, the incidence relation expressed by the digitized signals is complex, and once a process layer network or equipment fails, operation and maintenance personnel cannot perform rapid and accurate fault positioning. The further technical problem is that with the development of the power grid technology, the digitization degree of the transformer substation is improved, the IEC61850 technology is widely applied to the intelligent transformer substation, the monitoring and control of the primary equipment of the intelligent transformer substation are mainly realized through a process layer network and equipment, the association between the process layer equipment is defined by an SCD file, and the relationship is abstract and complex. Signals transmitted between process layer devices are not electrical signals transmitted by traditional cables any more, but are digital signals transmitted in a network mode, the digital signals form a process layer secondary virtual loop of the intelligent substation, and a physical transmission path passed by the secondary virtual loop is called a secondary real loop. The digital signals cannot be seen and found, so that when a secondary virtual-real circuit fails, analysis and fault location cannot be performed in a sensible mode, operation and maintenance difficulty is high, and fault removal and processing efficiency is low. In order to realize accurate fault location when the secondary virtual circuit has a fault, the relationship between the secondary virtual circuit and the real circuit must be mapped. However, the networking mode of the process layer is various and complex, only the mapping relation of the secondary virtual loop and the secondary real loop is not enough, when the faults of the transceiving equipment of a plurality of virtual loops passing through the same switch actually occur, the fault of the switch can be judged by mistake by utilizing the existing probability algorithm technology, and the purpose of very accurate fault positioning cannot be achieved.
Disclosure of Invention
In order to solve the problem of difficulty in locating the fault of the secondary circuit of the intelligent substation, the invention aims to provide a secondary circuit fault rapid locating method based on an IEC61850 standard technology, an SCD file of the intelligent substation, an intra-station process layer network topology structure and automatic routing calculation.
The technical scheme provided by the invention is a fault positioning method for a secondary circuit of an intelligent substation, and the method can be applied to departments or technical fields of power grid dispatching and maintenance units, relay protection operation and maintenance management and the like. The invention has the conception that the electric primary equipment plays a decisive role in the intelligent substation, and the normal operation of the process layer network and the process layer equipment is one of the key conditions for the safe and stable operation of the electric primary equipment of the intelligent substation. Aiming at the problems of complex association relation of process layer equipment, abstract transmitted digital signals, high operation, maintenance and maintenance difficulty, low efficiency and the like, the invention is based on IEC61850 technology and an intelligent substation SCD file, models primary and secondary equipment of the intelligent substation, a process layer secondary virtual circuit and a process layer optical fiber circuit, and provides a method for visualizing and accurately positioning a secondary circuit of the intelligent substation by utilizing an automatic G diagram generation technology and a multi-branch tree recursion algorithm to automatically calculate the mapping relation of the virtual and real circuits.
The invention firstly provides a technical scheme of a fault positioning method for a secondary circuit of an intelligent substation, which comprises the following steps:
configuring the analysis content of the SCD in the intelligent substation project; the parsed content of the SCD includes: GOOSE publishing-subscribing relation and SV publishing-subscribing relation among all devices of the process layer of the intelligent substation; and, alarm and telemetering information under each MMS access point and alarm and telemetering information under GOOSE access point;
modeling a secondary circuit of an intelligent substation in an intelligent substation project;
when the secondary circuit has a fault, the mapping relation between the virtual circuit and the real circuit is calculated by using a multi-branch tree algorithm, the telemetering and remote signaling information related to the equipment ports of the station control layer and the process layer is monitored by using IEC61850 and a network message acquisition technology, the fault is positioned, and the fault position is displayed in a visual mode by using an automatic G diagram generation technology.
The further improvement of the technical scheme is that the method specifically comprises the following implementation steps:
step 20, modeling a secondary loop;
step 30, calculating a mapping relation between the virtual loop and the real loop;
and step 40, positioning the fault of the secondary circuit.
A further improvement of the above technical solution is that the step 10 comprises the steps of:
step 11, analyzing the communication configuration parameters of the GOOSE and SV, connecting ap node, APPID is 4-bit 16-system number, which is the unique identification ID of the control block;
step 12, analyzing GOOSE release configuration, wherein the attributes contained in the GSEControl node include name, datSet, confRef, type and appID; the name is a control block name, the datSet attribute specifies a data set associated with the control block, and the name corresponds to the cbName attribute of the GSE in the ConnectedAP one by one;
step 13, analyzing SV release configuration, wherein in an SV control block SampledValueControl node, a datSet attribute designates a data set associated with the control block, a name is a control block name, and the name and the logical device instance number ldInst of the SampledValueControl node correspond to the cbName and ldInst attributes of the SMV in the ConnectedAP one by one;
step 14, analyzing the subscription configuration of GOOSE and SV, which is defined by the Inputs part in the LLN0 logical node under the logical device, where the Inputs node is composed of multiple virtual terminals connecting with ExtRef, each ExtRef defines the address intAddr of the internal input virtual terminal and the address of the external output virtual terminal, and finds the data object DO corresponding to the internal and external virtual terminals and/or the specific data attribute DA thereof according to these information;
step 15, analyzing the data set DataSet of the GOOSE/SV control block and the identification name attribute corresponding to the data set DataSet one by one; the DataSet node consists of a plurality of child nodes FCDA, and the ExtRef in FCDA and inputs are compared so as to obtain the APPID of the GOOSE/SV issuing end.
The technical scheme is further improved in that the external output virtual terminal address is composed of an idename, an ldInst, a prefix, an lnClass, an lnInst, a doName and a daName.
A further improvement of the above technical solution is that the step 20 comprises the steps of:
step 21, creating a secondary real loop model according to the network topology structure of the process layer in the transformer substation; the second order real loop model includes: process layer secondary equipment, ports and/or optical fibers;
step 22, creating a model of a secondary virtual loop according to the GOOSE, SV release-subscription relationship and process layer network topological structure among process layer devices; the secondary virtual circuit model includes: control block APPID, sending device iedName, receiving device iedName, sending virtual terminal name and reference, sending port name, receiving virtual terminal name and reference and/or receiving port name;
step 23, associating the secondary virtual circuit model with the broken link alarm reference of the virtual circuit;
and 24, associating the port model in the secondary real loop with the port state remote signaling and the transceiving light intensity remote sensing reference.
A further improvement of the above technical solution is that the step 30 includes:
step 31, calculating real loop information passed by the virtual loop by using a multi-branch tree algorithm;
and step 32, after all the secondary virtual loops of the total station are calculated, reversely calculating all the virtual loops flowing through the physical ports and the optical fibers.
A further improvement of the above technical solution is that the step 31 includes:
1) starting from optical fibers in all transmitting directions of transmitting end equipment of the virtual loop, searching an optical fiber 1 of which a transmitting port is a virtual loop transmitting port;
2) searching receiving end equipment of the optical fiber 1 by taking the optical fiber 1 as a starting point, and if the equipment type is an optical fiber distribution frame, continuously searching an optical fiber 2 of which the sending port is a receiving port of the optical fiber 1;
3) searching receiving end equipment of the optical fiber 2, iteratively executing the step 2 by taking the optical fiber 2 as a starting point, and finding an optical fiber 3 of which the sending port is a receiving port of the optical fiber 2;
4) searching receiving end equipment of the optical fiber 3, wherein the equipment type is the switch 1, continuously searching the optical fibers in all transmitting directions on the switch 1, and recording as an optical fiber set a after removing the optical fibers in the opposite direction of the optical fiber 3;
5) aiming at each optical fiber of the optical fiber set a, continuously repeating the steps 2) -4) one by one, if the type of the receiving end equipment is a non-optical fiber distribution frame or a switch, but the receiving end is not virtual loop receiving end equipment and a port, such as an optical fiber 7 in the figure, returning to the next optical fiber 4 of the set a, continuously repeating the steps until the receiving end equipment and the port are consistent with the receiving end and the port of the virtual loop, such as an optical fiber 6, ending the recursive search of the optical fiber 4, recording correct optical fibers in the route calculation process according to the sequence, and recording the correct optical fibers as an optical fiber set b, namely the route corresponding to the first virtual loop; if there are other fibers in the fiber set a, and the above steps are repeated, there may be a plurality of matching fiber sets, and all the fiber sets are recorded.
6) Through the recursive algorithm, if the calculated optical fiber set corresponding to the virtual loop is one, outputting the light ray set; if the calculated optical fiber sets corresponding to the virtual loops are multiple, a screening method is needed to keep the correct one as output.
A further improvement of the above technical solution is that the step 40 includes:
step 41, communicating with protection through IEC61850 technology on a station control layer, acquiring a secondary virtual loop broken link alarm state on line through a network message acquisition technology on a process layer, wherein for a secondary virtual loop of which the receiving end equipment is protected, the broken link alarm is an MMS alarm signal sent by protection, and for a secondary virtual loop of which the receiving end equipment is process layer equipment such as a merging unit and an intelligent terminal, the broken link alarm is a GOOSE signal related to a link state sent by the process layer equipment; judging the state of the secondary virtual loop according to the virtual loop associated with the chain breakage alarm;
step 42, communicating with protection through IEC61850 technology on a station control layer, acquiring information of secondary equipment port light intensity telemetering and port state telecommand on line through network message acquisition technology on a process layer, carrying out telemetering on the protected port light intensity, namely, analog quantity of protection, carrying out port state telecommand, namely, protecting switching quantity representing the port state, or representing alarm of port interruption, or representing alarm signal of port light intensity out-of-limit, and carrying out telemetering on the port light intensity of process layer equipment such as a merging unit, an intelligent terminal and the like, namely, carrying out telemetering on the process layer equipment through GSE message, wherein the port state telecommand, namely, sending telecommand representing the port state, or representing the port interruption, or representing the port light intensity out-of-limit by the process layer equipment through GOOSE message by the process layer equipment; for the equipment supporting the remote signaling related to the output port state, judging the port state according to the remote signaling related to the port state; for equipment only supporting light intensity telemetering of an output port, judging whether a light intensity value exceeds a set upper limit threshold and a set lower limit threshold, if so, judging that the port is interrupted, otherwise, judging that the port is correct;
step 43, obtaining all the virtual loop information through which the optical fiber flows through the virtual-real mapping relationship calculated by the multi-branch tree algorithm, and judging the state of the relevant optical fiber according to the virtual loop state and the virtual-to-real correlation in all the virtual loop information;
step 44, positioning a fault real loop related to the abnormal virtual loop according to the states of the virtual loop and the real loop and the virtual-to-real correlation;
and step 45, calculating the virtual loop information influenced by the fault real loop according to the states of the virtual loop and the real-to-virtual correlation.
The improvement of the technical scheme is that the intelligent substation secondary circuit fault positioning method further comprises the step 50 of visualizing the secondary circuit. In a further improvement of the above technical solution, in the step 50, generating the interval optical fiber connection diagram by using an automatic G diagram generation technology includes: the method comprises the following steps that a process layer switch, a protection and combination unit, intelligent terminal equipment names, port names and states of connection among equipment and optical fiber states are arranged; and/or displaying and outputting a mapping relation of the secondary virtual loop and the secondary real loop, wherein the mapping relation of the secondary virtual loop and the secondary real loop comprises virtual loop information of optical fibers or ports flowing through, equipment port names of the virtual loops, port states and optical fiber states; and/or, when the secondary loop fails, highlighting the fault position.
The following detailed description of the embodiments and various modifications of the present invention will be further described with reference to the accompanying drawings and various embodiments, respectively, so that those skilled in the art can understand the effects of the present invention on providing technical means, and further implement and modifications can be made by those skilled in the art according to the technical teaching.
Drawings
Fig. 1 is a GOOSE communication parameter configuration diagram in the process layer of the intelligent substation in the embodiment of the intelligent substation secondary circuit fault location method of the present invention;
fig. 2 is a diagram of SV communication parameter configuration in the process layer of the intelligent substation in the embodiment of the intelligent substation secondary circuit fault location method of the present invention;
fig. 3 is a GOOSE release configuration diagram of the intelligent substation in an embodiment of the intelligent substation secondary circuit fault location method of the present invention;
fig. 4 is an SV release configuration diagram of an intelligent substation in an embodiment of the intelligent substation secondary circuit fault location method of the present invention;
fig. 5 is a GOOSE and SV subscription configuration diagram of an intelligent substation in an embodiment of the intelligent substation secondary circuit fault location method of the present invention;
FIG. 6 is a diagram of an intelligent substation data set configuration in an embodiment of the intelligent substation secondary circuit fault location method of the present invention;
FIG. 7 is a configuration diagram of chain scission warning under an MMS access point of an intelligent substation in an embodiment of an intelligent substation secondary circuit fault location method of the invention;
fig. 8 is a chain breakage alarm configuration diagram under the GOOSE access point of the intelligent substation in the embodiment of the intelligent substation secondary circuit fault location method of the present invention;
fig. 9 is a flowchart illustrating analysis of GOOSE and SV publish-subscribe relationships between process level devices according to an embodiment of the intelligent substation secondary circuit fault location method of the present invention;
FIG. 10 is a flow chart of secondary circuit modeling in an embodiment of the method for locating a fault in a secondary circuit of an intelligent substation according to the present invention;
fig. 11 is a secondary circuit fault locating process in an embodiment of the intelligent substation secondary circuit fault locating method of the present invention;
fig. 12 is a flowchart of recursive routing computation in an embodiment of the intelligent substation secondary circuit fault location method of the present invention;
fig. 13 is a connection diagram of the spacing optical fibers in the embodiment of the intelligent substation secondary circuit fault location method of the present invention;
fig. 14 is a secondary circuit fault location visualization effect diagram in an embodiment of the intelligent substation secondary circuit fault location method of the present invention.
Detailed Description
Firstly, it should be noted that, in order to solve the problem that the secondary circuit fault location of the intelligent substation is difficult and inaccurate, a method for quickly and accurately locating the secondary circuit fault based on the IEC61850 technology, the network message collection technology, the SCD file of the intelligent substation and the in-station process layer network topology structure is provided and demonstrated herein through the following specific embodiments, that is, the method for locating the secondary circuit fault of the intelligent substation provided by the present invention. The method has the core concept that when a secondary circuit has a fault, the mapping relation of virtual and real circuits is automatically calculated by using a multi-branch tree algorithm, telemetering and remote signaling information related to ports of a station control layer and a process layer device is monitored by using IEC61850 and a network message acquisition technology, fault location is quickly and accurately positioned, and a G-diagram automatic generation technology is used for visually displaying the fault position, helping operation and maintenance personnel to remove the fault, reducing the difficulty of operation and maintenance and improving the working efficiency of the operation and maintenance personnel.
The method for positioning the fault of the secondary circuit of the intelligent substation is realized through four steps by combining the embodiment of the attached drawing: the method comprises the steps of SCD file analysis, secondary circuit modeling, virtual and real circuit mapping relation calculation and secondary circuit fault location.
And step 10, analyzing the SCD file. In the use of different versions of IEC61850 engineering configuration software, device information of MMS access points and GOOSE access points of Intelligent Electronic Devices (IEDs) in the intelligent substation is defined in a cid (configured IED description) file, and this step requires configuring the specified resolution contents of SCDs in the intelligent substation engineering on this basis, and the intelligent electronic devices related to the access points are in an activated state during commissioning, and these resolution contents include: GOOSE publishing-subscribing relation and SV publishing-subscribing relation among all devices of the process layer of the intelligent substation; and alarm and telemetry information under each MMS access point and alarm and telemetry information under a GOOSE access point.
The content of the engineering analysis of the intelligent substation is given in the demonstration of the embodiment: GOOSE and SV publish-subscribe relationships between process level devices, and alarm and telemetry information under MMS and GOOSE access points.
Specifically, the publish-subscribe relationship between GOOSE and SV in the process layer device in the SCD file is analyzed, as shown in fig. 9, the steps are as follows:
and 11, analyzing the communication configuration parameters of the GOOSE and the SV. For example, GOOSE in fig. 1, SV in fig. 2, connected ap node, APPID is 4-bit 16-ary number, and is the unique ID of each control block.
And step 12, analyzing the GOOSE release configuration. As shown in FIG. 3, the GSEControl node contains attributes of name, datSet, confRef, type, and appID. The name is a control block name, the datSet attribute specifies a data set associated with the control block, and the name corresponds to the cbName attribute of the GSE in the ConnectedAP node one by one.
And step 13, analyzing SV release configuration. As shown in fig. 4, in the SV control block SampledValueControl node, the datSet attribute specifies the data set associated with the control block, the name is the control block name, and the name and the logical device instance number ldInst to which SampledValueControl belong are in one-to-one correspondence with the cbName and ldInst attributes of SMV in connectiedeap.
Step 14, resolving subscription configuration of GOOSE and SV, which is defined in the Inputs part of LLN0 logical node under logical device, as shown in fig. 5. The Inputs node is composed of a plurality of virtual terminal connecting lines Extref, each ExtRef defines an address intAddr of an internal input virtual terminal and an address of an external output virtual terminal (composed of an idename, an ldInst, a prefix, an lnClass, an lnInst, a don name and a DA name), and data objects DO and even specific data attributes DA corresponding to the internal and external virtual terminals can be found according to the information.
Step 15, parsing the data set DataSet. As shown in FIG. 6, the name attribute is the ID, and the attribute datSet of the GOOSE/SV control block is the name of DataSet, which are in one-to-one correspondence. The DataSet node consists of a plurality of child nodes FCDA, and APPID of the GOOSE/SV issuing end can be obtained by comparing the FCDA with the Extref in inputs.
And analyzing the alarm and remote measurement information under the MMS and GOOSE access points in the SCD file, and aiming at obtaining secondary virtual circuit broken link alarm, secondary equipment port light intensity remote measurement and secondary equipment port state remote signaling information. The secondary virtual circuit chain breakage alarm refers to a chain breakage alarm signal sent by receiving end equipment, and for a receiving end which is protection equipment, the secondary virtual circuit chain breakage alarm is used for protecting an MMS alarm signal sent, and is defined under an MMS access point, namely an Access Point node with the attribute name of S1, as shown in FIG. 7; for the merge unit or the intelligent terminal, that is, the merge unit or the intelligent terminal sends a GOOSE alarm signal at the process level network, which is defined in the GOOSE access point, that is, the data set under the AccessPoint node whose attribute name is G1, as shown in fig. 8.
And step 20, modeling a secondary loop. The method comprises the steps of modeling a secondary circuit of the intelligent substation in an intelligent power station project by using configuration software, and establishing a model comprising a real circuit (secondary real circuit for short) of the secondary circuit and a virtual circuit (secondary virtual circuit for short) of the secondary circuit.
Referring to fig. 10, the modeling process of the secondary circuit of the intelligent substation engineering in this embodiment specifically includes the following steps:
and step 21, creating a secondary real loop model according to the inner process layer network topological structure of the transformer substation. The second order real loop model includes: secondary equipment, ports, optical fibers at the process level. Considering each secondary device as a vertex, and a specific port and fiber as edges, it is equivalent to forming an undirected graph of the related devices covering all secondary loops, and the undirected graph is used for generating a generated subgraph related to the publish-subscribe relationship between the access points after mapping with the secondary virtual loops.
And step 22, establishing a model of a secondary virtual circuit according to the GOOSE, SV release-subscription relation and process layer network topological structure among the process layer devices. The secondary virtual circuit model includes: control block APPID, sending device iedName, receiving device iedName, sending virtual terminal name and reference, sending port name, receiving virtual terminal name and reference, receiving port name.
And step 23, associating the secondary virtual circuit model with the broken link alarm reference of the virtual circuit.
And 24, associating the port model in the secondary real loop with the port state remote signaling and the transceiving light intensity remote sensing reference.
And step 30, calculating the mapping relation between the virtual loop and the real loop.
In this embodiment, the mapping relationship between the virtual and real loops includes two parts: the transmission path (i.e. real loop) passed by the virtual loop is recorded as the association from the virtual loop to the real loop; the virtual loop information transmitted in the real loop is recorded as the association of the real loop to the virtual loop direction. Referring now to fig. 12, exemplary sub-steps 31 to 32 of implementing step 30 are shown.
And step 31, calculating real loop information passed by the virtual loop by using a multi-branch tree algorithm.
Suppose that the secondary virtual loop information is:
1) GOOSE control block APPID1, transmitting device 1 and transmitting port 1-A, receiving device 2 and receiving port 1-A
2) GOOSE control block APPID2, sending device 2 and sending port 1-A, receiving device 1 and receiving port 1-A
3) GOOSE control block APPID3, transmitting device 3 and transmitting ports 1-C, receiving device 4 and receiving ports 1-C
4) GOOSE control block APPID4, transmitting device 4 and transmitting ports 1-C, receiving device 3 and receiving ports 1-C
Fig. 12 contains a schematic diagram of the actual physical fiber connections corresponding to the above 4 virtual circuits, horizontal and vertical solid connecting lines representing fibers, the double-headed arrows representing the front and back fibers, the letter labels at the two ends of the fibers, and the ports of the equipment at the two ends of the fibers. The dotted line represents the optical fiber passed through in the process of the multi-branch tree recursive computation of the first virtual loop, and the multi-branch tree algorithm is used for computing the virtual-to-real association, and the method is described as follows:
1) starting from optical fibers in all transmission directions of the virtual loop transmission end equipment, searching optical fibers of which the transmission ports are virtual loop transmission ports, such as an optical fiber 1 in the figure;
2) searching for receiving end equipment of the optical fiber 1, wherein the equipment type is an optical fiber distribution frame, and continuously searching for an optical fiber of which the sending port is a receiving port of the optical fiber 1, such as an optical fiber 2 in the figure;
3) searching for receiving end equipment of the optical fiber 2, and repeating the step 2 to find the optical fiber 3 because the equipment type is also an optical fiber distribution frame;
4) finding the receiving end equipment of the optical fiber 3, the type of equipment being a switch, such as switch 1 in the figure, continues to find the optical fibers in all transmission directions on switch 1, but it is necessary to exclude the optical fiber opposite to optical fiber 3 (i.e. the optical fiber transmitted from port 1-a of switch 1 to port 1-a of optical distribution frame 2), as shown in the figure, there are two optical fibers: optical fibers 4 and optical fibers 7, denoted as fiber set a;
5) and (3) continuously repeating the steps 2-4 one by one aiming at each optical fiber of the optical fiber set a, if the type of the receiving end equipment is a non-optical fiber distribution frame or a switch, but the receiving end is not virtual loop receiving end equipment and a port, such as the optical fiber 7 in the figure, returning to the next optical fiber 4 of the set a, and continuously repeating the steps until the receiving end equipment and the port are consistent with the receiving end and the port of the virtual loop, such as the optical fiber 6, ending the recursive search of the optical fiber 4, recording correct optical fibers in the route calculation process according to the sequence, and recording the correct optical fibers as an optical fiber set b (such as the optical fiber 1, the optical fiber 2, the optical fiber 3, the optical fiber 4, the optical fiber 5 and the optical fiber 6 in the figure), namely, the route corresponding to the first virtual loop. If there are other fibers in the fiber set a, and the above steps are repeated, there may be a plurality of matching fiber sets, and all the fiber sets are recorded.
6) Generally, there is only one switch cascading line, and there is only one and only one fiber set corresponding to the virtual circuit calculated through the recursive algorithm, but there are many switch cascading lines under special conditions, and there are many fiber sets corresponding to the virtual circuit calculated through the recursive algorithm at this time, and it is necessary to retain the correct one through a manual screening method.
Step 32, after the step 31 is completed, all the secondary virtual loops flowing through the physical port and the optical fiber are reversely calculated, for example, the optical fiber 4 in fig. 12, and the above recursive routing algorithm can calculate that the optical fiber sets of the first and fourth virtual loops both include the optical fiber 4, so that the virtual loop set flowing through the optical fiber 4 includes the first and fourth virtual loops. Similarly, the virtual loop set flowed through by the reverse fiber of the fiber 4 can be calculated, so that all the virtual loop sets flowed through the ports at the two ends of the fiber 4 can be calculated.
And step 40, positioning the fault of the secondary circuit.
In this embodiment, the secondary circuit fault location processing flow is as shown in fig. 11, and the specific steps are as follows:
and step 41, communicating with protection through IEC61850 technology on a station control layer, acquiring a secondary virtual loop broken link alarm state on line through a network message acquisition technology on a process layer, wherein for a secondary virtual loop of which the receiving end equipment is protected, the broken link alarm is an MMS alarm signal sent by protection, and for a secondary virtual loop of which the receiving end equipment is process layer equipment such as a merging unit and an intelligent terminal, the broken link alarm is a GOOSE signal related to a link state sent by the process layer equipment. Judging the state of the secondary virtual loop according to the virtual loop associated with the chain breakage alarm;
and 42, communicating with protection through an IEC61850 technology on a station control layer, acquiring information of port light intensity telemetering and port state telecommand of secondary equipment on line through a network message acquisition technology on a process layer, carrying out telemetering on the protected port light intensity, namely a protected analog quantity, protecting switching quantity representing the port state, or an alarm representing port interruption, or an alarm representing port light intensity out-of-limit alarm signal on the protected port, carrying out telemetering on the port light intensity of process layer equipment such as a merging unit and an intelligent terminal, namely telemetering sent by the process layer equipment through a GSE message, and sending telecommand representing the port state, or representing the port interruption, or representing the port light intensity out-of-limit by the process layer equipment through a GOOSE message on the port state telecommand the port state out-of-limit. And for the equipment supporting the remote signaling related to the output port state, judging the port state according to the remote signaling related to the port state. For the equipment only supporting the light intensity telemetering of the output port, whether the light intensity value exceeds the set upper and lower limit threshold value or not needs to be judged, if the light intensity value exceeds the set upper and lower limit threshold value, the port is judged to be interrupted, and if the light intensity value does not exceed the set upper and lower limit threshold value, the port is judged to be interrupted.
Step 43, by the virtual-real mapping relationship calculated by the multi-way tree algorithm described above, all the virtual loop information flowing through the optical fiber can be known, and the optical fiber state is determined according to the virtual loop state and the virtual-real correlation.
And step 44, positioning the fault real loop (optical fiber and port) related to the abnormal virtual loop according to the states of the virtual loop and the real loop and the virtual-to-real correlation.
And step 45, calculating the virtual loop information influenced by the fault real loop according to the states of the virtual loop and the real-to-virtual correlation.
The embodiment is an intelligent substation secondary circuit fault positioning method for realizing secondary circuit visualization, and is different from the above embodiments in that the method further comprises a step 50 of secondary circuit visualization.
In this embodiment, the visualization of the secondary loop in step 50 includes the visualization of a secondary virtual loop and a secondary real loop.
Specifically, in this embodiment, the generating of the interval optical fiber connection diagram by using the technique of automatically generating the G diagram, as shown in fig. 13, includes: the system comprises a process layer switch, a protection and merging unit, intelligent terminal equipment names, port names and states of connection among the equipment, and optical fiber states. Meanwhile, the mapping relation of the secondary virtual loop and the secondary real loop can be displayed, namely the virtual loop information of the optical fiber or the port flowing through, the equipment port name of the virtual loop, the port state and the optical fiber state, and when the secondary loop breaks down, the fault position is highlighted. As in fig. 14.
In order to solve the problem that the secondary circuit fault of the intelligent substation is difficult and inaccurate to locate, embodiments of the present disclosure provide a method for quickly and accurately locating the secondary circuit fault based on an IEC61850 technology, a network message collection technology, an intelligent substation SCD file, and an in-station process layer network topology structure. In some embodiments, when a secondary loop fails, the mapping relationship of virtual and real loops is automatically calculated by using a multi-branch tree algorithm, and remote measurement and remote signaling information related to ports of a station control layer and a process layer device are monitored by using IEC61850 and a network message acquisition technology to perform rapid and accurate fault location. In some embodiments, the technology of automatically generating the G diagram is utilized to visually display the fault position, so that the operation and maintenance personnel can be helped to perform fault elimination, the difficulty of operation and maintenance is reduced, and the working efficiency of the operation and maintenance personnel is improved. The non-illustrated parts of the various embodiments may be implemented or modified based on the technical solutions provided by the present invention with reference to other related embodiments, and the embodiments formed by mutual reference are also regarded as specific embodiments provided by the present invention. The inventive method is implemented by means of computer technology, and computer equipment storing or running instructions or intermediate data of the inventive method technical idea is considered as a product obtained by the inventive method.
Claims (10)
1. A method for positioning faults of a secondary circuit of an intelligent substation is characterized by comprising the following steps:
configuring the analysis content of the SCD in the intelligent substation project; the parsed content of the SCD includes: GOOSE publishing-subscribing relation and SV publishing-subscribing relation among all devices of the process layer of the intelligent substation; and, alarm and telemetering information under each MMS access point and alarm and telemetering information under GOOSE access point;
modeling a secondary circuit of an intelligent substation in an intelligent substation project;
when the secondary circuit has a fault, the mapping relation between the virtual circuit and the real circuit is calculated by using a multi-branch tree algorithm, the telemetering and remote signaling information related to the equipment ports of the station control layer and the process layer is monitored by using IEC61850 and a network message acquisition technology, the fault is positioned, and the fault position is displayed in a visual mode by using an automatic G diagram generation technology.
2. The intelligent substation secondary circuit fault location method of claim 1, wherein the method of step 1 is implemented according to the following sequence of steps:
step 10, analyzing the SCD file;
step 20, modeling a secondary loop;
step 30, calculating a mapping relation between the virtual loop and the real loop;
and step 40, positioning the fault of the secondary circuit.
3. The intelligent substation secondary circuit fault location method of claim 2, wherein the step 10 comprises the steps of:
step 11, analyzing the communication configuration parameters of the GOOSE and SV, connecting ap node, APPID is 4-bit 16-system number, which is the unique identification ID of the control block;
step 12, analyzing GOOSE release configuration, wherein the attributes contained in the GSEControl node include name, datSet, confRef, type and appID; the name is a control block name, the datSet attribute specifies a data set associated with the control block, and the name corresponds to the cbName attribute of the GSE in the ConnectedAP one by one;
step 13, analyzing SV release configuration, wherein in an SV control block SampledValueControl node, a datSet attribute designates a data set associated with the control block, a name is a control block name, and the name and the logical device instance number ldInst of the SampledValueControl node correspond to the cbName and ldInst attributes of the SMV in the ConnectedAP one by one;
step 14, analyzing the subscription configuration of GOOSE and SV, which is defined by the Inputs part in the LLN0 logical node under the logical device, where the Inputs node is composed of multiple virtual terminals connecting with ExtRef, each ExtRef defines the address intAddr of the internal input virtual terminal and the address of the external output virtual terminal, and finds the data object DO corresponding to the internal and external virtual terminals and/or the specific data attribute DA thereof according to these information;
step 15, analyzing the data set DataSet of the GOOSE/SV control block and the identification name attribute corresponding to the data set DataSet one by one; the DataSet node consists of a plurality of child nodes FCDA, and the ExtRef in FCDA and inputs are compared so as to obtain the APPID of the GOOSE/SV issuing end.
4. The intelligent substation secondary circuit fault location method of claim 3, characterized in that: the external output virtual terminal address is composed of an idename, an ldInst, a prefix, an lnClass, an lnInst, a doName and a daName.
5. The intelligent substation secondary circuit fault location method of claim 2, wherein the step 20 comprises the steps of:
step 21, creating a secondary real loop model according to the network topology structure of the process layer in the transformer substation; the second order real loop model includes: process layer secondary equipment, ports and/or optical fibers;
step 22, creating a model of a secondary virtual loop according to the GOOSE, SV release-subscription relationship and process layer network topological structure among process layer devices; the secondary virtual circuit model includes: control block APPID, sending device iedName, receiving device iedName, sending virtual terminal name and reference, sending port name, receiving virtual terminal name and reference and/or receiving port name;
step 23, associating the secondary virtual circuit model with the broken link alarm reference of the virtual circuit;
and 24, associating the port model in the secondary real loop with the port state remote signaling and the transceiving light intensity remote sensing reference.
6. The intelligent substation secondary circuit fault location method of claim 2, wherein the step 30 comprises:
step 31, calculating real loop information passed by the virtual loop by using a multi-branch tree algorithm;
and step 32, after all the secondary virtual loops of the total station are calculated, reversely calculating all the virtual loops flowing through the physical ports and the optical fibers.
7. The intelligent substation secondary circuit fault location method of claim 6, wherein the step 31 comprises:
1) starting from optical fibers in all transmitting directions of transmitting end equipment of the virtual loop, searching an optical fiber 1 of which a transmitting port is a virtual loop transmitting port;
2) searching receiving end equipment of the optical fiber 1 by taking the optical fiber 1 as a starting point, and if the equipment type is an optical fiber distribution frame, continuously searching an optical fiber 2 of which the sending port is a receiving port of the optical fiber 1;
3) searching receiving end equipment of the optical fiber 2, iteratively executing the step 2 by taking the optical fiber 2 as a starting point, and finding an optical fiber 3 of which the sending port is a receiving port of the optical fiber 2;
4) searching receiving end equipment of the optical fiber 3, wherein the equipment type is the switch 1, continuously searching the optical fibers in all transmitting directions on the switch 1, and recording as an optical fiber set a after removing the optical fibers in the opposite direction of the optical fiber 3;
5) aiming at each optical fiber of the optical fiber set a, continuously repeating the steps 2) -4) one by one, if the type of the receiving end equipment is a non-optical fiber distribution frame or a switch, but the receiving end is not virtual loop receiving end equipment and a port, such as an optical fiber 7 in the figure, returning to the next optical fiber 4 of the set a, continuously repeating the steps until the receiving end equipment and the port are consistent with the receiving end and the port of the virtual loop, such as an optical fiber 6, ending the recursive search of the optical fiber 4, recording correct optical fibers in the route calculation process according to the sequence, and recording the correct optical fibers as an optical fiber set b, namely the route corresponding to the first virtual loop; if there are other fibers in the fiber set a, and the above steps are repeated, there may be a plurality of matching fiber sets, and all the fiber sets are recorded.
6) Through the recursive algorithm, if the calculated optical fiber set corresponding to the virtual loop is one, outputting the light ray set; if the calculated optical fiber sets corresponding to the virtual loops are multiple, a screening method is needed to keep the correct one as output.
8. The intelligent substation secondary circuit fault location method of claim 2, wherein the step 40 comprises:
step 41, communicating with protection through IEC61850 technology on a station control layer, acquiring a secondary virtual loop broken link alarm state on line through a network message acquisition technology on a process layer, wherein for a secondary virtual loop of which the receiving end equipment is protected, the broken link alarm is an MMS alarm signal sent by protection, and for a secondary virtual loop of which the receiving end equipment is process layer equipment such as a merging unit and an intelligent terminal, the broken link alarm is a GOOSE signal related to a link state sent by the process layer equipment; judging the state of the secondary virtual loop according to the virtual loop associated with the chain breakage alarm;
step 42, communicating with protection through IEC61850 technology on a station control layer, acquiring information of secondary equipment port light intensity telemetering and port state telecommand on line through network message acquisition technology on a process layer, carrying out telemetering on the protected port light intensity, namely, analog quantity of protection, carrying out port state telecommand, namely, protecting switching quantity representing the port state, or representing alarm of port interruption, or representing alarm signal of port light intensity out-of-limit, and carrying out telemetering on the port light intensity of process layer equipment such as a merging unit, an intelligent terminal and the like, namely, carrying out telemetering on the process layer equipment through GSE message, wherein the port state telecommand, namely, sending telecommand representing the port state, or representing the port interruption, or representing the port light intensity out-of-limit by the process layer equipment through GOOSE message by the process layer equipment; for the equipment supporting the remote signaling related to the output port state, judging the port state according to the remote signaling related to the port state; for equipment only supporting light intensity telemetering of an output port, judging whether a light intensity value exceeds a set upper limit threshold and a set lower limit threshold, if so, judging that the port is interrupted, otherwise, judging that the port is correct;
step 43, obtaining all the virtual loop information through which the optical fiber flows through the virtual-real mapping relationship calculated by the multi-branch tree algorithm, and judging the state of the relevant optical fiber according to the virtual loop state and the virtual-to-real correlation in all the virtual loop information;
step 44, positioning a fault real loop related to the abnormal virtual loop according to the states of the virtual loop and the real loop and the virtual-to-real correlation;
and step 45, calculating the virtual loop information influenced by the fault real loop according to the states of the virtual loop and the real-to-virtual correlation.
9. The intelligent substation secondary circuit fault location method of claim 2, further comprising, step 50, secondary circuit visualization.
10. The intelligent substation secondary circuit fault location method of claim 9, wherein in step 50, the step of generating the interval optical fiber connection diagram by using an automatic G diagram generation technology comprises: the method comprises the following steps that a process layer switch, a protection and combination unit, intelligent terminal equipment names, port names and states of connection among equipment and optical fiber states are arranged; and/or displaying and outputting a mapping relation of the secondary virtual loop and the secondary real loop, wherein the mapping relation of the secondary virtual loop and the secondary real loop comprises virtual loop information of optical fibers or ports flowing through, equipment port names of the virtual loops, port states and optical fiber states; and/or, when the secondary loop fails, highlighting the fault position.
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