Metro power supply system misoperation-preventive locking system based on topology analysis and method thereof

Abstract

A metro power supply system misoperation-preventive locking method based on topology analysis comprises the steps that firstly, a topological relation is defined according to a hierarchical structure defined by substation configuration description languages, and an interval topology configuration file is generated; secondly, directly reading the interval topology configuration file by the interval layer protection device, acquiring the connection relation and the attribute of the electrical equipment, and respectively storing the connection relation and the attribute into the interval layer protection device in an adjacent matrix mode and a binary mode; then, searching all spaced switches by adopting a traversal algorithm, and judging an anti-error logic interval association relationship according to the equipment electrification condition and the communication relationship; anti-misoperation judgment is carried out in combination with an anti-misoperation judgment rule, locking logic is generated according to a result, and the operation authority of related equipment is controlled; finally, when possible misoperation is detected, an alarm is given out immediately, and the operation authority of related equipment is locked; according to the invention, the system wiring is simplified, and the intelligent level of anti-misoperation locking is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-mistaken locking, and in particular to a subway power supply system anti-mistaken locking system and method based on topological analysis. Background Art

[0002] In the subway power supply system, when the system needs to change the operation mode or maintenance and overhaul, the equipment needs to be switched. In order to ensure the normal switching operation and accident handling, and reduce the risk of system misoperation, corresponding anti-misoperation interlocking operation procedures must be formulated. At present, the anti-misoperation interlocking of the subway power supply system mainly configures the anti-misoperation interlocking of the station control layer and the electrical secondary anti-misoperation interlocking measures of the interval layer. The anti-misoperation interlocking of the station control layer is mainly based on the computer monitoring software and is realized based on the logical interlocking of the monitoring software; while the electrical secondary anti-misoperation interlocking measure is a kind of anti-misoperation based on the secondary operation circuit, which is realized by connecting the auxiliary contacts of the circuit breaker and the knife switch in series in the operation circuit. It has a high dependence on the secondary operation circuit. When the auxiliary contacts are unreliable or the insulation of the secondary operation circuit is damaged, the switch is prone to misoperation. In addition, there is a lack of monitoring means for the status of the secondary circuit. When the secondary control cable is broken or the contact is poor, there is a risk of anti-misoperation failure.

[0003] With the improvement of substation automation level, substations with few or no personnel have put forward higher requirements for system digitization and intelligence in order to improve operation and maintenance efficiency. The existing anti-error locking method has problems such as complex wiring and difficult maintenance and repair, and can no longer meet the requirements of intelligence. The application of IEC61850 technology in the subway power supply system has realized rapid information transmission and status monitoring. At present, the system description file SSD based on IEC61850 has been generally automatically generated, realizing the description of the primary equipment of the substation and its connection relationship, providing a basis for intelligent anti-error locking. Summary of the invention

[0004] In order to solve the problems of complex wiring and difficult maintenance and repair in the existing anti-mistaken locking, the present invention provides a subway power supply system anti-mistaken locking system and method based on topological analysis, which simplifies system wiring, reduces manual configuration and maintenance workload, and improves the intelligent level of anti-mistaken locking on the basis of ensuring reliability. To achieve the above purpose, the present invention is implemented through the following technical solutions:

[0005] A method for preventing mislocking of a subway power supply system based on topological analysis comprises the following steps:

[0006] Step S1, according to the hierarchical structure defined by the substation configuration description language, the topological relationship is defined according to the hierarchical structure of the substation, voltage level, voltage, bay, conductive equipment, and connection point, and an interval topology configuration file is generated;

[0007] Step S2, the bay layer protection device directly reads the bay topology configuration file, obtains the connection relationship of the electrical equipment and the attributes of the electrical equipment, stores the connection relationship of the electrical equipment in the bay layer protection device in the form of an adjacency matrix, and stores the attributes of the electrical equipment in the bay layer protection device in a binary form;

[0008] Step S3: The bay layer protection device searches all switches in the bay using a breadth-first search traversal algorithm, and determines the error-prevention logic bay association relationship based on the power-on status and connectivity of the equipment;

[0009] Step S4, the spacer layer protection device performs an anti-misoperation judgment in combination with the anti-misoperation judgment rule, automatically generates a locking logic according to the anti-misoperation judgment result, and controls the operation authority of the relevant equipment;

[0010] Step S5: When a possible misoperation is detected, the spacer protection device immediately sounds an alarm and automatically locks the operating authority of related equipment to prevent misoperation from occurring.

[0011] Preferably, the implementation method of defining the topological relationship in step S1 is: determining the type of each conductive device through a primary device identification code, and the specific settings include setting the circuit breaker to CBR, setting the disconnector or knife switch to DIS, setting the transformer to PTR, setting the power cable to CAB, setting the busbar to EBUS, setting the current transformer to CTR, setting the voltage transformer to VTR, setting the rail to RAIL, setting the shunt to SHUNT, and setting the electrical segment to SEG.

[0012] Preferably, the implementation method of generating the interval topology configuration file in step S1 is: through a unified substation configuration description language configuration tool, the connection relationship of the primary equipment is read from the substation specification description part in the substation configuration description file to generate the interval topology configuration file.

[0013] Preferably, the method for storing the connection relationship of the electrical equipment in the interval layer protection device in step S2 is: first determine the equipment and electrical connection relationship of the interval, and then use graph theory methods to use nodes to represent power supply equipment and edges to represent electrical connections between devices, define nodes and edges, each node represents a device in the interval, and each edge represents the connection relationship and flow direction between devices, abstract the primary graph of the interval into a directed graph, and store it in the interval layer protection device in the form of an adjacency matrix.

[0014] Preferably, the attributes of the electrical equipment in step S2 include loop number, equipment type, equipment status, and interval association attributes; the connection relationship of the electrical equipment includes connection point number, connection point type, electrical connection status, loop number of adjacent conductive equipment, and the number of adjacent conductive equipment.

[0015] Preferably, the equipment types are divided into switch type equipment and non-switch type equipment, including circuit breakers, disconnectors, earthing switches, transformers, power cables, busbars, mutual inductors, and rails;

[0016] The connection point types include power points, grounding points, load points and other main equipment connection points; the electrical connection states are divided into charging state, grounding state and power-off state;

[0017] The loop number of the adjacent conductive device refers to the loop number of the node that is connected to the device currently being operated; the number of the adjacent conductive devices refers to the number of nodes that are connected to the device currently being operated.

[0018] Preferably, the method for determining the anti-error logic interval association relationship in step S3 is: the interval layer protection device takes the power supply point as the starting point, and searches for the device that has the anti-error logic association with the anti-error operation device based on the topological relationship of the directed graph. If the searched anti-error operation device and the device with the anti-error logic association are in the same interval, then the anti-error logic interval association relationship is the same interval association relationship, otherwise it is a cross-interval association relationship; the cross-interval association relationship is divided into a small bilateral power supply mode and a large bilateral power supply mode.

[0019] Preferably, the specific setting of the anti-misjudgment rule in step S4 is as follows:

[0020] Preventing the switch from being opened or closed by mistake: judging whether the switch is allowed to be opened or closed according to the connection point type and electrical connection status on both sides of the switch;

[0021] Prevent opening and closing of the knife switch under load: determine whether there are power points and load points on both sides of the knife switch to avoid operating under load;

[0022] Prevent live grounding: Check whether there are power points and grounding points at the same time to prevent live grounding equipment operation;

[0023] Prevent closing the circuit breaker or disconnector with the grounding wire: Make sure that the relevant equipment is out of the grounding state before closing the circuit breaker;

[0024] Prevent accidental entry into live compartments: Determine whether the operator is likely to enter live compartments based on the operating tasks and equipment properties.

[0025] Preferably, when the system is in a small bilateral power supply mode operation state, the neighboring station anti-error blocking rule is adopted; when the system is in a large bilateral power supply mode operation state, the cross-station anti-error blocking rule is adopted;

[0026] An anti-misoperation locking system for a subway power supply system that executes an anti-misoperation locking method based on topological analysis, including a dispatching center, a relay protection device, an Ethernet switch, and an optical port switch; the dispatching center and the relay protection device perform MMS communication through the Ethernet switch, and the relay protection device realizes GOOSE communication at the bay level through the optical port switch.

[0027] The present invention has the following advantages and beneficial effects compared with the prior art:

[0028] Based on topological analysis and electrical principles, the present invention realizes intelligent anti-misoperation judgment, reduces human misjudgment, can improve real-time performance and reliability, enhance system stability and security, simplify construction and network structure, optimize coordinated control, improve system efficiency, reduce losses, and enhance system adaptability, etc. It provides strong technical support for the safe operation and efficient management of the subway power supply system, can be widely applied to anti-misoperation locking at the bay level, and can also be used for anti-misoperation locking at the station control level. Description of the Drawings

[0029] Figure 1 It is the execution flowchart of the anti-misoperation locking method for the subway power supply system of the present invention;

[0030] Figure 2 It is the primary system diagram of the subway power supply system;

[0031] Figure 3 It is the schematic diagram of the topological structure of Substation A and Substation B. Detailed Embodiments

[0032] Next, in combination with the drawings and specific embodiments, the present invention will be further described:

[0033] To make the purpose, technical solution and advantages of the present invention clearer and more definite, the following takes examples with reference to the drawings to further illustrate the present invention.

[0034] Embodiment 1:

[0035] As Figure 1 shown, an anti-misoperation locking method for a subway power supply system based on topological analysis includes the following steps:

[0036] Step S1, according to the hierarchical structure defined by the substation configuration description language, the topological relationship is defined according to the hierarchical level of the substation, voltage level, voltage, interval, conductive equipment, and connection point, and an interval topology configuration file is generated; wherein, the topological relationship is defined in the following manner: the type of each conductive equipment is determined by a primary equipment identification code, and the specific settings include setting the circuit breaker to CBR, setting the disconnector or knife switch to DIS, setting the transformer to PTR, setting the power cable to CAB, setting the busbar to EBUS, setting the current transformer to CTR, setting the voltage transformer to VTR, setting the rail to RAIL, setting the shunt to SHUNT, and setting the electrical segment to SEG; specifically, the busbar equipment of the interval protection device is obtained by identifying the element with the node name ConductingEquipment and the node element attribute type as EBUS; the interval protection device The circuit breaker equipment of the protection device is obtained by identifying the element with the node name ConductingEquipment and the node element attribute type is CBR; the disconnecting switch equipment of the interval protection device is obtained by identifying the element with the node name ConductingEquipment and the node element attribute type is DIS; the shunt equipment of the interval protection device is obtained by identifying the element with the node name ConductingEquipment and the node element attribute type is SHNT; the cable equipment of the interval protection device is obtained by identifying the element with the node name ConductingEquipment and the node element attribute type is CAB; the rail equipment of the interval protection device is obtained by identifying the element with the node name ConductingEquipment and the node element attribute type is RAIL.

[0037] The method of generating the interval topology configuration file is: using a unified substation configuration description language configuration tool, reading the connection relationship of the primary equipment from the substation specification description part in the substation configuration description file, and generating the interval topology configuration file.

[0038] Step S2, the interval layer protection device directly reads the interval topology configuration file, obtains the connection relationship of the electrical equipment and the attributes of the electrical equipment, stores the connection relationship of the electrical equipment in the interval layer protection device in the form of an adjacency matrix, and stores the attributes of the electrical equipment in the interval layer protection device in a binary form; this method can represent all switches in the interval and their connection relationship as a directed graph through the adjacency matrix, so that step S3 further adopts a breadth-first search traversal algorithm to realize the search and collection of results; and the attributes of the electrical equipment include loop number, equipment type, equipment status, interval-related attributes; and the equipment type is divided into switch-type equipment and non-switch-type equipment, including circuit breakers, disconnectors, grounding switches, transformers, power cables, busbars, mutual inductors, rails, etc. The connection relationship of the electrical equipment includes the connection point number, connection point type, electrical connection status, loop number of the adjacent conductive equipment, and the number of adjacent conductive equipment. The connection point type here includes power points, grounding points, load points and other major equipment connection points; the electrical connection status is divided into charging state, grounding state, and power-off state; the loop number of the adjacent conductive equipment refers to the node loop number that has a connection relationship with the currently operating equipment; the number of adjacent conductive equipment refers to the number of nodes that have a connection relationship with the currently operating equipment.

[0039] The method of storing the connection relationship of electrical equipment in the interval layer protection device is: first determine the equipment and electrical connection relationship of the interval, and then use graph theory methods to use nodes to represent power supply equipment and edges to represent electrical connections between devices. Nodes and edges are defined, each node represents a device in the interval, and each edge represents the connection relationship and flow direction between devices. The primary graph of the interval is abstracted into a directed graph and stored in the interval layer protection device in the form of an adjacency matrix.

[0040] Step S3, the bay layer protection device uses a breadth-first search traversal algorithm to search all switches in the bay, and determines the anti-error logic bay association relationship according to the power-on status and connectivity of the equipment; the bay protection devices can also interact with the protection devices of other bays through the GOOSE communication protocol to update the topology information in real time, and obtain the real-time application topology of the control domain; the method of determining the anti-error logic bay association relationship in the above steps is: the bay layer protection device takes the power point as the starting point, and searches for the device with anti-error logic association with the anti-error operation device based on the topological relationship of the directed graph; if the searched anti-error operation device and the device with anti-error logic association are in the same bay, the anti-error logic bay association relationship is the same bay association relationship, otherwise it is a cross-bay association relationship; the cross-bay association relationship is divided into a small bilateral power supply mode and a large bilateral power supply mode; and when in the small bilateral power supply mode operation state, the neighboring station anti-error locking rule is adopted; when the system is in the large bilateral power supply mode operation state, the cross-station anti-error locking rule is adopted.

[0041] Step S4, the spacer layer protection device performs anti-misoperation judgment in combination with the anti-misjudgment rule, automatically generates a locking logic according to the anti-misjudgment result, and controls the operation authority of the relevant equipment; the specific setting of the anti-misjudgment rule is as follows:

[0042] Preventing the switch from being opened or closed by mistake: judging whether the switch is allowed to be opened or closed according to the connection point type and electrical connection status on both sides of the switch;

[0043] Prevent opening and closing of the knife switch under load: determine whether there are power points and load points on both sides of the knife switch to avoid operating under load;

[0044] Prevent live grounding: Check whether there are power points and grounding points at the same time to prevent live grounding equipment operation;

[0045] Prevent closing the circuit breaker or disconnector with the grounding wire: Make sure that the relevant equipment is out of the grounding state before closing the circuit breaker;

[0046] Prevent accidental entry into live compartments: Determine whether the operator is likely to enter live compartments based on the operating tasks and equipment properties.

[0047] Step S5: When a possible misoperation is detected, the spacer protection device immediately sounds an alarm and automatically locks the operating authority of related equipment to prevent misoperation from occurring.

[0048] like Figures 2 to 3 As shown, substation B is taken as an example here.

[0049] As shown in reference to the B substation, the interval layer protection device B201 is used to store the topological information of B11-B1-B12-B_201-B13-EBUS, the interval layer protection device B202 is used to store the topological information of B21-B2-B22-B_202-B23-EBUS, the interval layer protection device B211 is used to store the topological information of EBUS-B31-B_211-B32-B3-B33-B_2111-B_2113-B34, and the interval layer protection device B213 is used to store the topological information of EBUS-B41-B_ 213-B42-B4-B43-B_2131-B_2113-B44, the interval layer protection device B212 is used to store the topology information of EBUS-B51-B_212-B52-B5-B53-B_2121-B_2124-B54, the interval layer protection device B214 is used to store the topology information of EBUS-B61-B_214-B62-B6-B63-B_2141-B_2124-B64, the configuration of substation A is similar to that of substation B, and will not be repeated here.

[0050] Among them, B1-B8 and EBUS are non-switch type devices, and the properties of the electrical equipment include loop number and device type; B_201, B_202, B_211, B_212, B_213, B_214, B_2111, B_2131, B_2113, B_2121, B_2141, and B_2124 are switch type devices, and the properties of the electrical equipment include loop number, device type, device status, and bay association properties; B11-B13, B21-B23, B31-B34, B41-B44, B51-B54, and B61-B64 are connection points, among which B11, B21, B31, B41, B51, and B61 are power supply points, B13, B23, B34, B44, B54, and B64 are load points, and B12, B22, B32, B33, B42, B43, B53, B53, B62, and B63 are connection points for other major equipment; the electrical connection states of the connection points are divided into: charging state, grounding state, and power-off state; when B11 is energized, B11 and B12 are in charging state; when B11 is energized and B_201 is in the closed position, B13 is energized, and at the same time B23, B31, B41, B51, and B61 are energized. Each bay layer protection device uses a connectivity graph traversal algorithm to search for all switches in the bay, and interacts with the protection devices of other bays in real time through the IEC61850 communication protocol to update topology information, thereby obtaining the real-time application topology of this control domain; the bay layer protection devices interact with each other in real time through the GOOSE communication protocol.

[0051] If you want to close the B_2141 isolating switch, the judgment process is as follows:

[0052] The bay layer protection device B214 reads the bay topology configuration file. B_2141 is connected to B6, B_2124, A_2124, and A_2121. Starting from the power point B61, the device with anti-error logic association with B_2141 is searched based on the topological relationship. The bay layer protection device B214 finds that the A_2124 and A_2121 devices are not in the same bay as B_2141, and determines that the anti-error locking bay association relationship is a cross-bay association relationship.

[0053] Furthermore, the bay layer protection device B214 exchanges information with A212 through the GOOSE communication method. If the A_2124 switch is a switch-off device, it is determined that the system is in a small bilateral operation state. According to the judgment rule of the load switch, it is determined whether there are power points and load points on both sides of the knife switch at the same time. When the electrical connection status of B63, B64, and A34 is in a power-off state, B_2141 is allowed to close the switch. At this time, the neighboring station anti-mistaken locking rule is adopted. Similarly, when the electrical connection status of C63, C64, and A34 in the A substation and the C substation is in a power-off state, C_2141 is allowed to close the switch, which is the cross-station anti-mistaken locking rule.

[0054] like Figure 3 As shown, when B63 is the power point, since there are power points and load points on both sides of the isolating switch B_2141, the B_2141 switch is not allowed to be closed or opened.

[0055] Embodiment 2:

[0056] A subway power supply system anti-error locking system based on topology analysis is used to implement a subway power supply system anti-error locking method, which includes a dispatching center, a relay protection device, an Ethernet switch, an optical port switch and other devices; wherein the dispatching center and the relay protection device realize MMS communication through the Ethernet switch, and the relay protection device realizes GOOSE communication of the interval layer within the station through the optical port switch to complete the anti-error locking of the interval layer. Data interaction between the interval layers between stations can be achieved through switch cascading, that is, the optical port switches of each substation realize data interaction between the interval layers of the entire line in a hand-in-hand manner. The data acquisition and monitoring control system of the station control layer communicates with the interval layer protection device through the MMS communication protocol to update the topology information of the entire line, and can also realize the anti-error locking of the station control layer.

Claims

1. A method for preventing mislocking of a subway power supply system based on topology analysis, characterized in that: The following steps are involved: Step S1, according to the hierarchical structure defined by the substation configuration description language, the topological relationship is defined according to the hierarchical structure of the substation, voltage level, voltage, bay, conductive equipment, and connection point, and an interval topology configuration file is generated; Step S2, the bay layer protection device directly reads the bay topology configuration file, obtains the connection relationship of the electrical equipment and the attributes of the electrical equipment, stores the connection relationship of the electrical equipment in the bay layer protection device in the form of an adjacency matrix, and stores the attributes of the electrical equipment in the bay layer protection device in a binary form; Step S3: The bay layer protection device searches all switches in the bay using a breadth-first search traversal algorithm, and determines the error-prevention logic bay association relationship based on the power-on status and connectivity of the equipment; Step S4, the spacer layer protection device performs an anti-misoperation judgment in combination with the anti-misoperation judgment rule, automatically generates a locking logic according to the anti-misoperation judgment result, and controls the operation authority of the relevant equipment; Step S5: When a possible misoperation is detected, the spacer protection device immediately sounds an alarm and automatically locks the operating authority of related equipment to prevent misoperation from occurring.

2. According to the method for preventing mislocking of a subway power supply system based on topology analysis in claim 1, it is characterized in that: The implementation method of defining the topological relationship in step S1 is: determining the type of each conductive device through a primary device identification code, and the specific settings include setting the circuit breaker to CBR, setting the disconnector or knife switch to DIS, setting the transformer to PTR, setting the power cable to CAB, setting the busbar to EBUS, setting the current transformer to CTR, setting the voltage transformer to VTR, setting the rail to RAIL, setting the shunt to SHUNT, and setting the electrical segment to SEG.

3. The method for preventing mislocking of a subway power supply system based on topology analysis according to claim 1 is characterized in that: The implementation method of generating the interval topology configuration file in step S1 is: using a unified substation configuration description language configuration tool, reading the connection relationship of the primary equipment from the substation specification description part in the substation configuration description file, and generating the interval topology configuration file.

4. The method for preventing mislocking of a subway power supply system based on topology analysis according to claim 1 is characterized in that: The method for storing the connection relationship of the electrical equipment in the interval layer protection device in step S2 is: first determine the equipment and electrical connection relationship of the interval, and then use graph theory methods to use nodes to represent power supply equipment and edges to represent electrical connections between devices, define nodes and edges, each node represents a device in the interval, and each edge represents the connection relationship and flow direction between devices, abstract the primary graph of the interval into a directed graph, and store it in the interval layer protection device in the form of an adjacency matrix.

5. The method for preventing mislocking of a subway power supply system based on topology analysis according to claim 1 is characterized in that: The attributes of the electrical equipment in step S2 include loop number, equipment type, equipment status, and interval associated attributes; the connection relationship of the electrical equipment includes connection point number, connection point type, electrical connection status, loop number of adjacent conductive equipment, and the number of adjacent conductive equipment.

6. The method for preventing mislocking of a subway power supply system based on topology analysis according to claim 5 is characterized in that: The equipment types are divided into switch type equipment and non-switch type equipment, including circuit breakers, disconnectors, earthing switches, transformers, power cables, busbars, mutual inductors, and rails; The connection point types include power points, grounding points, load points and other main equipment connection points; the electrical connection states are divided into charging state, grounding state and power-off state; The loop number of the adjacent conductive device refers to the loop number of the node that is connected to the device currently being operated; the number of the adjacent conductive devices refers to the number of nodes that are connected to the device currently being operated.

7. The method for preventing mislocking of a subway power supply system based on topology analysis according to claim 1 is characterized in that: The method for determining the anti-error logic interval association relationship in step S3 is: the interval layer protection device takes the power supply point as the starting point, and searches for devices that have an anti-error logic association with the anti-error operation device based on the topological relationship of the directed graph. If the searched anti-error operation device and the device with the anti-error logic association are in the same interval, the anti-error logic interval association relationship is the same interval association relationship, otherwise it is a cross-interval association relationship; the cross-interval association relationship is divided into a small bilateral power supply method and a large bilateral power supply method.

8. The method for preventing mislocking of a subway power supply system based on topology analysis according to claim 1 is characterized in that: The specific setting of the anti-misjudgment rule in step S4 is as follows: Preventing the switch from being opened or closed by mistake: judging whether the switch is allowed to be opened or closed according to the connection point type and electrical connection status on both sides of the switch; Prevent opening and closing of the knife switch under load: determine whether there are power points and load points on both sides of the knife switch to avoid operating under load; Prevent live grounding: Check whether there are power points and grounding points at the same time to prevent live grounding equipment operation; Prevent closing the circuit breaker or disconnector with the grounding wire: Make sure that the relevant equipment is out of the grounding state before closing the circuit breaker; Prevent accidental entry into live compartments: Determine whether the operator is likely to enter live compartments based on the operating tasks and equipment properties.

9. The method for preventing mislocking of a subway power supply system based on topology analysis according to claim 7 is characterized in that: When the system is in the small bilateral power supply mode, the neighboring station anti-error blocking rule is adopted; when the system is in the large bilateral power supply mode, the cross-station anti-error blocking rule is adopted.

10. An anti-mistaken locking system for executing a subway power supply system anti-mistaken locking method based on topology analysis as claimed in any one of claims 1 to 9, characterized in that: It includes a dispatching center, a relay protection device, an Ethernet switch, and an optical port switch; the dispatching center and the relay protection device perform MMS communication through the Ethernet switch, and the relay protection device realizes GOOSE communication of the interval layer through the optical port switch.

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