CN109861395B - Method for dynamically controlling state machine of intelligent substation relay protection equipment - Google Patents
Method for dynamically controlling state machine of intelligent substation relay protection equipment Download PDFInfo
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Abstract
The invention discloses a method for dynamically controlling a state machine of relay protection equipment of an intelligent substation, which comprises the steps of defining state sets of various relay protection equipment of the intelligent substation; defining the state transition diagram control direction of the relay protection equipment to form various relay protection equipment state transition diagrams; defining a triggering condition for state transition of various relay protection devices of the intelligent substation; dynamically matching the current state of each relay protection device of the intelligent substation; completing dynamic detection of the state transition triggering condition of the relay protection equipment; outputting a state result of the relay protection equipment to realize state identification of the relay protection equipment of the intelligent substation; the method provided by the invention can dynamically identify the state of the intelligent substation relay protection equipment, and lays a foundation for the application of non-corresponding monitoring and overhaul safety measure check of the operation state of the intelligent substation primary and secondary equipment.
Description
Technical Field
The invention belongs to the technical field of power system relay protection, and particularly relates to a method for dynamically controlling a state machine of relay protection equipment of an intelligent substation.
Background
In recent years, many accidents caused by incorrect input of the protection function of the operating equipment occur in China, such as total station voltage loss caused by 330kV clear water river of the Ningxia power grid in 2013, total station voltage loss caused by 330kV perpetual climbing of the Gansu power grid in 2014, total station voltage loss caused by 220kV Penglai of the Zhoushan of Zhejiang province in 2018 and the like, the protection function of the current stage is locked because a relay protection pressing plate is incorrectly input or withdrawn (the state of secondary equipment for relay protection does not correspond to the state of primary equipment), and the fault needs to be removed by means of previous protection, so that the accident influence range is enlarged.
Therefore, in order to improve the safe operation level of the power grid, a plurality of researches on the state of primary main equipment of the power grid, the state of secondary relay protection equipment and the corresponding relation between the state of the primary main equipment and the state of the secondary relay protection equipment are developed domestically, the state of the primary and secondary equipment of the power grid is monitored, whether the states of relay protection and safety devices meet the requirements of the state of the primary equipment is judged, an alarm is given immediately when an abnormality is found, and the abnormality is sent to a main operation and maintenance station. However, the current research on the state of the secondary relay protection equipment has the following limitations and disadvantages:
the definition of the secondary equipment state is generally a simple pressure plate classification combination relation, all types of protection devices define a universal secondary equipment state, and the secondary equipment state is not subdivided according to the protection type;
the classification granularity of the pressing plate is coarse, and the state judgment is insensitive or inaccurate;
the corresponding relation between the external associated interval pressing plate and the operation branch cannot be clearly defined, and under certain operation modes, the state of the secondary equipment does not support on-line real-time identification and needs manual identification and confirmation of operation and maintenance staff.
Disclosure of Invention
The invention aims to provide a dynamic control method for online state identification of the intelligent substation relay protection equipment aiming at the limitations and the defects of the prior art, the method can dynamically identify the state of the intelligent substation relay protection equipment, and lays a foundation for realizing non-corresponding monitoring and maintenance safety measure check of the operation state of the intelligent substation primary and secondary equipment.
The technical problem to be solved by the invention is realized by the following technical scheme:
a method for dynamically controlling a state machine of relay protection equipment of an intelligent substation comprises the following steps:
step S1, defining state sets of various relay protection devices of the intelligent substation;
step S2, defining the state transition diagram control direction of the relay protection equipment in the step S1, and forming various relay protection equipment state transition diagrams of the intelligent substation;
step S3, defining triggering conditions for state transition of various relay protection devices of the intelligent substation based on the state transition diagrams of various relay protection devices of the intelligent substation in the step S2;
step S4, dynamically matching the current state of each relay protection device of the intelligent substation based on the relay protection device state set and the online monitoring of the relay protection device state in the step S1;
step S5, completing dynamic detection of the relay protection equipment state transition triggering condition based on the step S3 and the step S4;
and S6, dynamically controlling a relay protection equipment state machine based on the trigger condition in the step S4 and the state transition diagram in the step S2, outputting a relay protection equipment state result, and realizing state identification of the intelligent substation relay protection equipment.
As a further improved technical solution, the step S1 specifically includes the following steps:
step S1.1, extracting, classifying and integrating all information of various relay protection devices of an intelligent substation according to the state identification requirements of various relay protection equipment of the intelligent substation to form normal operation state information and functional pressing plate information of various relay protection devices, wherein the normal operation state information of the relay protection devices comprises device operation information, device non-alarm information and device non-protection locking information, the normal operation functional pressing plate information of the relay protection devices comprises differential protection function soft pressing plate information, reclosing pressing plate information, GOOSE sending pressing plate information, GOOSE receiving pressing plate information, failure joint tripping GOOSE receiving soft pressing plate information, failure starting GOOSE receiving soft pressing plate information and interval receiving soft pressing plate information, and the normal operation state information and the functional pressing plate information of the relay protection devices are criterion signals of the state of the relay protection equipment;
step S1.2, based on the information of the normal running state of each relay protection device and the information of the functional pressing plate in the step S1.1 as criterion signals, defining various relay protection equipment state sets of the intelligent substation, wherein the various relay protection equipment state sets of the intelligent substation comprise a line protection state set, a transformer protection state set and a bus protection state set, and the line protection state set is defined as a set of a line protection input state, a line protection overhaul state, a line protection change value state and a line protection exit state; the transformer protection state set is defined as a set of a transformer protection input state, a transformer protection overhaul state, a transformer protection coordination state and a transformer protection exit state; the bus protection state set is defined as a set of a bus protection state switching-in state, a bus protection state overhauling state, a bus protection state matching one-state, a bus protection state matching two-state and a bus protection state quitting state.
As a further improved technical solution, the control direction of the state transition diagram of the relay protection device in step S2 is defined by using the operation characteristic and the secondary operation mode control principle, the state transition control direction of the relay protection equipment comprises a line protection input control direction, a line protection overhaul control direction, a line protection reset control direction, a line protection quit control direction, a main transformer protection input control direction, a main transformer protection overhaul control direction, a main transformer protection cooperation control direction, a main transformer protection quit control direction, a bus protection input control direction, a bus protection overhaul control direction, a bus protection cooperation one-state control direction, a bus protection cooperation two-state control direction and a bus protection quit control direction, and based on the definition of the state transition control direction of the relay protection equipment and the state set of the relay protection equipment, each state transition diagram of various relay protection equipment of an intelligent substation can be formed.
As a further improved technical solution, in step S3, the triggering conditions for state transition of various relay protection devices include a line protection device state transition triggering condition, a main transformer protection device state transition triggering condition, and a bus protection device state transition triggering condition.
As a further improved technical solution, in step S4, specifically, based on the online monitoring of the state of the relay protection device and a standardized information model, the operation state information, the soft pressing plate state information, and the hard pressing plate state information of each type of relay protection device are collected in real time, and after the information is confirmed to be valid, the operation state information, the soft pressing plate state information, and the hard pressing plate state information are dynamically matched with the defined state sets of each type of relay protection device, so as to identify the current state of each relay protection device of the intelligent substation.
As a further improved technical solution, in the step S5, the dynamic detection of the relay protection device state transition triggering condition specifically includes: the method comprises the steps of monitoring running state information and function pressing plate state information of the relay protection equipment in real time by adopting a state machine operation module of the relay protection equipment, dynamically detecting states of state transition triggering conditions by combining various state transition diagrams of various relay protection equipment of the intelligent substation, registering corresponding triggering conditions according to a triggering-callback mechanism, executing a state transition control direction when the state transition triggering conditions are found to be met, and entering the next equipment state.
As a further improved technical solution, in the step S6, when the state meeting the state transition touch condition is dynamically detected in the step S5, a callback process is performed, and a new device state of the relay protection device is dynamically formed in real time according to the relay protection state transition diagram model and the control direction.
As a further improved technical scheme, in the step S1.2, the line protection input state refers to a state in which the line protection device normally operates, a GOOSE sending soft pressing plate and a functional soft pressing plate are input according to a fixed value single requirement, and the maintenance pressing plate is withdrawn; the line protection maintenance state refers to a state when the line protection device quits all GOOSE sending soft pressing plates related to the running equipment and puts the pressing plates into maintenance; the line protection value-changing state refers to a state when the line protection device exits all GOOSE sending soft pressing plates except reclosing, exits all differential protection function soft pressing plates and is put into maintenance; line protection exit state: the line protection device is indicated to quit all GOOSE sending soft pressing plates and functional soft pressing plates, and the state of the line protection device when the line protection device is put into maintenance and repair; the main transformer protection input state refers to the state when a main transformer protection device normally operates, and a GOOSE sending soft pressing plate, a GOOSE receiving soft pressing plate and a functional soft pressing plate are input according to a fixed value single requirement, and the pressing plates are withdrawn from maintenance; the main transformer protection maintenance state refers to a state when a main transformer protection device normally operates and is matched with a quit failure joint tripping GOOSE receiving soft pressing plate; the main transformer protection coordination state refers to a state when the main transformer protection device quits all GOOSE sending soft pressing plates related to the operation equipment and is put into maintenance of the pressing plates; the main transformer protection quitting state refers to a state when the main transformer protection device quits all the GOOSE sending soft pressing plates, the GOOSE receiving soft pressing plates and the functional soft pressing plates and is put into maintenance; the bus protection switching-in state refers to a state that the bus protection device normally operates, a GOOSE sending soft pressing plate, a GOOSE receiving soft pressing plate, an interval receiving soft pressing plate and a function soft pressing plate are switched in according to a fixed value single requirement, and the bus protection device is withdrawn from the state when the bus protection device overhauls the pressing plates; the bus protection maintenance state refers to a state when the bus protection device exits all GOOSE sending soft pressing plates related to the running equipment and is put into maintenance on the pressing plates; the bus protection coordination state refers to a state that when the bus protection device works at intervals of a circuit and a main transformer without power failure, the bus protection coordination exits from a state that a corresponding interval start failure GOOSE receives a soft pressing plate; the bus protection coordination two-state refers to the state that when the bus protection device works in the interval power failure of a circuit and a main transformer, the bus protection coordination quits the state of the corresponding interval startup failure GOOSE receiving soft pressing plate and the interval receiving soft pressing plate; the bus protection exit state refers to a state when the bus protection device exits all the GOOSE transmitting soft pressing plates, the GOOSE receiving soft pressing plates, the interval receiving soft pressing plates and the functional soft pressing plates and is put into maintenance of the pressing plates.
As a further improved technical solution, the line protection device state transition triggering condition includes: the device comprises a device running state, a decoration and overhaul hard pressing plate switching state, a functional soft pressing plate, a differential protection functional soft pressing plate, a reclosing soft pressing plate, a GOOSE tripping soft pressing plate and a switch failure sending soft pressing plate; the main transformer protection equipment state transition triggering conditions comprise: the device is in an operating state, a decoration and overhaul hard pressing plate is in a switching state, a functional soft pressing plate, a GOOSE tripping soft pressing plate, a failure joint tripping GOOSE receiving soft pressing plate and a switch is switched on to send a failure soft pressing plate; the bus protection equipment state transition triggering conditions comprise: the device is in an operating state, a decoration and overhaul hard pressing plate switching state, a functional soft pressing plate, a branch trip GOOSE sending soft pressing plate, a branch failure joint trip GOOSE sending soft pressing plate and a branch switch starting failure receiving soft pressing plate.
It should be noted that the line protection switching control direction indicates that the line protection device normally operates, a GOOSE sending soft pressing plate and a functional soft pressing plate are switched according to a fixed value single requirement, and the line protection switching state is entered when the maintenance pressing plate is withdrawn; the line protection maintenance control direction indicates that the line protection device exits all GOOSE sending soft pressing plates related to the operation equipment, and enters a line protection maintenance state when the line protection maintenance control direction is input into the maintenance pressing plates; the line protection resetting value control direction indicates that the line protection device exits all GOOSE sending soft pressing plates except reclosing, exits all differential protection function soft pressing plates, and enters a state of line protection resetting value when the line protection resetting value control device is put into maintenance and repair; the line protection exit control direction indicates that the line protection device exits all GOOSE sending soft pressing plates and functional soft pressing plates and enters a line protection exit state when the line protection exit control device is put into maintenance and repair; the main transformer protection input control direction indicates that when the main transformer protection device normally operates, a GOOSE sending soft pressing plate, a GOOSE receiving soft pressing plate and a functional soft pressing plate are input according to a constant value single requirement, and when the main transformer protection input control direction exits from a maintenance pressing plate, a main transformer protection input state is entered; the main transformer protection maintenance control direction indicates that the main transformer protection device normally operates and enters a main transformer protection maintenance state when the main transformer protection device is matched with the soft pressing plate received by the out-of-order combined tripping GOOSE; the main transformer protection coordination control direction means that the main transformer protection device exits all GOOSE sending soft pressing plates related to operating equipment and enters a main transformer protection coordination state when the pressing plates are put into maintenance; the main transformer protection exit control direction means that the main transformer protection device exits all the GOOSE sending soft pressing plates, the GOOSE receiving soft pressing plates and the functional soft pressing plates, and enters a main transformer protection exit state when the main transformer protection exit control device is put into the maintenance pressing plates; the bus protection switching control direction indicates that when the bus protection device normally operates, a GOOSE sending soft pressing plate, a GOOSE receiving soft pressing plate, an interval receiving soft pressing plate and a functional soft pressing plate are switched according to a fixed value single requirement, and when the bus protection switching control device is withdrawn from a maintenance pressing plate, the bus protection switching state is entered; the bus protection maintenance control direction refers to a state that the bus protection device exits all GOOSE sending soft pressing plates related to the operation equipment and is put into maintenance of the pressing plates; the bus protection and coordination integrated state control direction means that when the bus protection device works at intervals of a circuit and a main transformer without power failure, the bus protection and coordination enters a bus protection and coordination integrated state when the bus protection device exits from a corresponding interval start failure GOOSE receiving soft pressing plate; the bus protection matched two-state control direction means that when the bus protection device works in a power failure mode at intervals of a line and a main transformer, the bus protection matched state enters a bus protection matched two-state when the bus protection matched state exits from a corresponding interval startup failure GOOSE receiving soft pressing plate and an interval receiving soft pressing plate; the bus protection exit control direction means that the bus protection device exits all the GOOSE sending soft pressing plates, the GOOSE receiving soft pressing plates, the interval receiving soft pressing plates and the functional soft pressing plates, and enters a bus protection exit state when the bus protection device is put into the maintenance pressing plates.
Compared with the prior art, the invention has the beneficial effects that:
the intelligent substation relay protection equipment state visual display method can flexibly define and automatically and dynamically identify the state of the intelligent substation relay protection equipment in real time, provides effective assistance for daily operation and maintenance of the intelligent substation and greatly improves the maintenance work efficiency of the intelligent substation through visual display of the equipment state. Meanwhile, the method is combined with the applications of primary and secondary equipment state non-corresponding monitoring, maintenance safety measure task checking and the like, so that operation and inspection personnel can be helped to practically and effectively make safety measures of the power system, primary power equipment damage and large-area power failure accidents of the power grid caused by relay protection state function missing or misdelivery are prevented, the safe operation of the regional power grid is guaranteed, and considerable economic and social benefits are brought.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention;
fig. 2 is a state transition flow chart of a relay protection device according to embodiment 1 of the present invention;
fig. 3 is a state trigger condition and a state machine working schematic diagram of the relay protection device in embodiment 1 of the present invention;
fig. 4 is a state transition flow chart of a relay protection device according to embodiment 2 of the present invention;
fig. 5 is a state trigger condition and a state machine working schematic diagram of the relay protection device in embodiment 2 of the present invention;
fig. 6 is a state transition flowchart of a relay protection device according to embodiment 3 of the present invention;
fig. 7 is a state trigger condition and a state machine working schematic diagram of the relay protection device according to embodiment 4 of the present invention;
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Examples
A method for dynamically controlling a state machine of relay protection equipment of an intelligent substation comprises the following steps:
step S1, defining state sets of various relay protection devices of the intelligent substation;
step S2, defining the state transition diagram control direction of the relay protection equipment in the step S1, and forming state transition diagrams of various relay protection equipment of the intelligent substation;
step S3, defining triggering conditions for state transition of various relay protection devices of the intelligent substation based on the state transition diagrams of various relay protection devices of the intelligent substation in the step S2;
step S4, dynamically matching the current state of each relay protection device of the intelligent substation based on the relay protection device state set and the online monitoring of the relay protection device state in the step S1;
step S5, completing dynamic detection of the relay protection equipment state transition triggering condition based on the step S3 and the step S4;
and S6, dynamically controlling a relay protection equipment state machine based on the trigger condition in the step S4 and the state transition diagram in the step S2, outputting a relay protection equipment state result, and realizing state identification of the intelligent substation relay protection equipment.
Example 1
As shown in fig. 1, the method for dynamically controlling the state machine of the intelligent substation relay protection device is performed according to the following steps:
step S101, acquiring position information and voltage and current real-time values of a primary equipment switch, an isolation disconnecting link and a grounding disconnecting link through an intelligent substation integrated automation system, calculating a primary interval state by combining a primary topological relation, and defining the primary interval state as four states of operation, hot standby, cold standby and maintenance;
step S102, extracting, classifying and integrating all information of various relay protection devices of the intelligent substation according to the state identification requirement of various relay protection equipment of the intelligent substation to form two types of information such as normal operation state information of the relay protection devices and function pressing plate information; the normal operation state of the relay protection device consists of three types of information, namely that the device operates; the device has no warning information; the device has no information such as protection locking and the like; the relay protection device function pressing plate can be divided into 7 types according to protection types, and the types are respectively as follows: the protection device comprises a differential protection function soft pressing plate (special for a circuit), a reclosing pressing plate (special for the circuit), a Goose sending pressing plate, a Goose receiving pressing plate (main transformer and mother difference), a failure joint tripping Goose receiving soft pressing plate (special for the main transformer), a failure Goose receiving soft pressing plate and a seven-step interval receiving soft pressing plate (special for the mother difference), wherein the 10 types of signals are called relay protection device state criterion signals.
Step S103, logically combining the 10 types of relay protection equipment state criterion signals on the basis of the step S102, and defining a state identification mechanism of the relay protection equipment;
step S104, defining the state set of the line protection equipment as four states of { input, overhaul, value change and exit }, wherein the identification mechanism of each state is shown in the following table:
table 1 line protection equipment state identification mechanism principle table
And S105, defining a transition diagram of each state of the intelligent substation line relay protection device and a trigger condition for dynamic transition between the states on the basis of the step 104. According to the primary and secondary corresponding logic requirements of the intelligent substation, the differential protection function soft pressing plate and the reclosing soft pressing plate are used as two special function pressing plates to be independently classified.
The state transition flow chart of the relay protection device is shown in fig. 2.
And S106, calculating a protection equipment state by using the operation module of the state machine of the line relay protection equipment, wherein the state is called as an initial state. Dynamically monitoring and identifying the state transition triggering condition of the relay protection equipment, registering the corresponding triggering condition according to a triggering-callback mechanism, performing callback processing after the triggering condition is met, and dynamically identifying a new protection state in real time according to a relay protection state transition diagram model.
The working principle diagram of the state trigger condition and the state machine of the relay protection device is shown in fig. 3.
Example 2
Step S201, acquiring position information and voltage and current real-time values of a primary equipment switch, an isolation disconnecting link and a grounding disconnecting link through an intelligent substation integrated automation system, calculating a primary interval state by combining a primary topological relation, and defining the primary interval state as four states of operation, hot standby, cold standby and maintenance;
step S202, extracting, classifying and integrating all information of various relay protection devices of the intelligent substation according to the state identification requirement of various relay protection equipment of the intelligent substation to form two types of information such as normal operation state information of the relay protection devices and functional press plate information; the normal operation state of the relay protection device consists of three types of information, namely that the device operates; the device has no warning information; the device has no information such as protection locking and the like; the relay protection device function pressing plate can be divided into 7 types according to protection types, and the types are respectively as follows: the protection device comprises a differential protection function soft pressing plate (special for a circuit), a reclosing pressing plate (special for the circuit), a Goose sending pressing plate, a Goose receiving pressing plate (main transformer and mother difference), a failure joint tripping Goose receiving soft pressing plate (special for the main transformer), a failure Goose receiving soft pressing plate and a seven-step interval receiving soft pressing plate (special for the mother difference), wherein the 10 types of signals are called relay protection device state criterion signals.
Step S203, performing logic combination on the 10 types of relay protection equipment state criterion signals on the basis of the step S202, and defining a state identification mechanism of the relay protection equipment;
step S204, defining the state set of the main transformer protection equipment into four states of { input, overhaul, coordination and exit }, wherein the identification mechanism of each state is shown in the following table:
TABLE 2 State control mechanism principle table of main transformer protection equipment
And S205, defining a transition diagram of each state of the intelligent substation main transformer relay protection equipment and a trigger condition of dynamic circulation between the states on the basis of the step S204. According to the logic requirements corresponding to the primary and secondary functions of the intelligent substation, the soft pressure plate for receiving the failed GOOSE with the united trip is used as a special GOOSE receiving pressure plate for independent classification.
The state transition flow chart of the relay protection device is shown in fig. 4.
And S206, calculating a protection equipment state by the main transformer protection relay protection equipment state machine operation module, wherein the state is called as an initial state. Dynamically monitoring and recognizing the state transition triggering condition of the relay protection equipment, registering the corresponding triggering condition according to a triggering-callback mechanism, performing callback processing after the triggering condition is met, and dynamically recognizing a new protection state in real time according to a relay protection state transition graph model.
The working principle diagram of the state trigger condition and the state machine of the relay protection device is shown in fig. 5.
Example 3
Step S301, acquiring position information and voltage and current real-time values of a primary equipment switch, an isolation disconnecting link and a grounding disconnecting link through an intelligent substation integrated automation system, and calculating a primary interval state by combining a primary topological relation, wherein the primary interval state is defined as four states of operation, hot standby, cold standby and maintenance;
step S302, extracting, classifying and integrating all information of various relay protection devices of the intelligent substation according to the state identification requirement of various relay protection equipment of the intelligent substation to form two types of information such as normal operation state information of the relay protection devices and function pressing plate information; the normal operation state of the relay protection device consists of three types of information, namely that the device operates; the device has no warning information; the device has no information such as protection locking and the like; the relay protection device function pressing plate can be divided into 7 types according to protection types, and the types are respectively as follows: the protection device comprises a differential protection function soft pressing plate (special for a circuit), a reclosing pressing plate (special for the circuit), a Goose sending pressing plate, a Goose receiving pressing plate (main transformer and mother difference), a failure joint tripping Goose receiving soft pressing plate (special for the main transformer), a failure Goose receiving soft pressing plate and a seven-step interval receiving soft pressing plate (special for the mother difference), wherein the 10 types of signals are called relay protection device state criterion signals.
Step S303, logically combining the 10 types of relay protection equipment state criterion signals on the basis of the step S302, and defining a state identification mechanism of the relay protection equipment;
step S304, the general state of the bus protection equipment state is defined as five states of input, maintenance, first state coordination, second state coordination and exit, and the identification mechanism of each state is shown in the following table:
table 3 bus protection equipment state identification mechanism principle table
And S305, defining a transition diagram of each state of the intelligent substation bus relay protection equipment and a trigger condition of dynamic circulation between the states on the basis of the step S304. According to the first and second corresponding logic requirements of the intelligent substation, the branch start failure GOOSE receiving soft pressing plate and the interval receiving soft pressing plate are used as two special pressing plates to be independently classified. The state transition flow chart of the relay protection device is shown in fig. 6.
Step S306, the operation module of the bus protection relay protection equipment state machine calculates a protection equipment state, and the state is called as an initial state. Dynamically monitoring and recognizing the state transition triggering condition of the relay protection equipment, registering the corresponding triggering condition according to a triggering-callback mechanism, performing callback processing after the triggering condition is met, and dynamically recognizing a new protection state in real time according to a relay protection state transition graph model.
The working principle diagram of the state trigger condition and the state machine of the relay protection device is shown in fig. 7.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A method for dynamically controlling a state machine of relay protection equipment of an intelligent substation is characterized by comprising the following steps:
step S1, defining state sets of various relay protection devices of the intelligent substation;
step S2, defining the state transition diagram control direction of the relay protection equipment in the step S1, and forming various relay protection equipment state transition diagrams of the intelligent substation;
step S3, defining triggering conditions for state transition of various relay protection devices of the intelligent substation based on the state transition diagrams of various relay protection devices of the intelligent substation in the step S2;
step S4, dynamically matching the current state of each relay protection device of the intelligent substation based on the relay protection device state set and the online monitoring of the relay protection device state in the step S1;
step S5, completing dynamic detection of the relay protection equipment state transition triggering condition based on the step S3 and the step S4;
step S6, dynamically controlling a state machine of the relay protection equipment based on the trigger condition in the step S4 and the state transition diagram in the step S2, outputting a state result of the relay protection equipment, and realizing state identification of the relay protection equipment of the intelligent substation;
the step S1 specifically includes the following steps:
step S1.1, extracting, classifying and integrating all information of various relay protection devices of an intelligent substation according to the state identification requirements of various relay protection equipment of the intelligent substation to form normal operation state information and functional pressing plate information of various relay protection devices, wherein the normal operation state information of the relay protection devices comprises device operation information, device non-alarm information and device non-protection locking information, the normal operation functional pressing plate information of the relay protection devices comprises differential protection function soft pressing plate information, reclosing pressing plate information, GOOSE sending pressing plate information, GOOSE receiving pressing plate information, failure joint tripping GOOSE receiving soft pressing plate information, failure starting GOOSE receiving soft pressing plate information and interval receiving soft pressing plate information, and the normal operation state information and the functional pressing plate information of the relay protection devices are criterion signals of the state of the relay protection equipment;
step S1.2, based on the information of the normal running state of each relay protection device and the information of the functional pressing plate in the step S1.1 as criterion signals, defining various relay protection equipment state sets of the intelligent substation, wherein the various relay protection equipment state sets of the intelligent substation comprise a line protection state set, a transformer protection state set and a bus protection state set, and the line protection state set is defined as a set of a line protection input state, a line protection overhaul state, a line protection change value state and a line protection exit state; the transformer protection state set is defined as a set of a transformer protection input state, a transformer protection overhaul state, a transformer protection coordination state and a transformer protection exit state; the bus protection state set is defined as a set of a bus protection state input state, a bus protection state overhaul state, a bus protection state matching one-state, a bus protection state matching two-state and a bus protection state exit state;
the control direction of the state transition diagram of the relay protection device in step S2 is defined by using the operation characteristics and the secondary operation mode control principle, the state transition control direction of the relay protection equipment comprises a line protection input control direction, a line protection overhaul control direction, a line protection resetting control direction, a line protection exit control direction, a main transformer protection input control direction, a main transformer protection overhaul control direction, a main transformer protection coordination control direction, a main transformer protection exit control direction, a bus protection input control direction, a bus protection overhaul control direction, a bus protection coordination one-state control direction, a bus protection coordination two-state control direction and a bus protection exit control direction.
2. The method according to claim 1, wherein in step S3, the triggering conditions for state transition of various types of relay protection devices include a line protection device state transition triggering condition, a main transformer protection device state transition triggering condition, and a bus protection device state transition triggering condition.
3. The method according to claim 1, wherein step S4 is specifically based on an online monitoring of relay protection device status and a standardized information model, and is configured to collect, in real time, operating status information, soft-pressing board status information, and hard-pressing board status information of various relay protection devices, and after confirming that the information is valid, dynamically match the information with the defined various relay protection device status sets, and identify a current status of each relay protection device of the intelligent substation.
4. The method according to claim 1, wherein in step S5, the process of dynamically detecting the state transition trigger condition of the relay protection device specifically includes: the method comprises the steps of monitoring running state information and function pressing plate state information of the relay protection equipment in real time by adopting a state machine operation module of the relay protection equipment, dynamically detecting states of state transition triggering conditions by combining various state transition diagrams of various relay protection equipment of the intelligent substation, registering corresponding triggering conditions according to a triggering-callback mechanism, executing a state transition control direction when the state transition triggering conditions are found to be met, and entering the next equipment state.
5. The method according to claim 1, wherein in step S6, when the state meeting the state transition condition is dynamically detected in step S5, the process of tuning back is performed, and a new device state of the relay protection device is dynamically formed in real time according to the relay protection state transition diagram model and the control direction.
6. The method for dynamically controlling the state machine of the intelligent substation relay protection equipment according to claim 1, wherein in the step S1.2, a line protection switching-in state refers to a state that a line protection device normally operates, a GOOSE sending soft pressing plate and a functional soft pressing plate are switched in according to a fixed value single requirement, and the state is when the pressing plates are removed from maintenance; the line protection maintenance state refers to a state when the line protection device quits all GOOSE sending soft pressing plates related to the running equipment and puts the pressing plates into maintenance; the line protection changing state refers to a state when the line protection device exits all GOOSE sending soft pressing plates except reclosure, exits all differential protection function soft pressing plates and is put into service for pressing plates; line protection exit state: the line protection device is indicated to quit all GOOSE sending soft pressing plates and functional soft pressing plates, and the state of the line protection device when the line protection device is put into maintenance and repair; the main transformer protection input state refers to the state when a main transformer protection device normally operates, and a GOOSE sending soft pressing plate, a GOOSE receiving soft pressing plate and a functional soft pressing plate are input according to a fixed value single requirement, and the pressing plates are withdrawn from maintenance; the main transformer protection maintenance state refers to a state when a main transformer protection device normally operates and is matched with a quit failure joint tripping GOOSE receiving soft pressing plate; the main transformer protection coordination state refers to a state when the main transformer protection device quits all GOOSE sending soft pressing plates related to the operation equipment and is put into maintenance of the pressing plates; the main transformer protection exit state refers to a state when the main transformer protection device exits all the GOOSE sending soft pressing plates, the GOOSE receiving soft pressing plates and the functional soft pressing plates and is put into maintenance of the pressing plates; the bus protection switching state refers to a state when the bus protection device normally operates, a GOOSE sending soft pressing plate, a GOOSE receiving soft pressing plate, an interval receiving soft pressing plate and a function soft pressing plate are switched according to a fixed value single requirement, and the pressing plates are released from maintenance; the bus protection maintenance state refers to a state when the bus protection device exits all GOOSE sending soft pressing plates related to the operation equipment and is put into maintenance of the pressing plates; the bus protection matching state refers to a state that when the bus protection device works at intervals of a circuit and a main transformer without power failure, the bus protection matching state exits corresponding intervals of startup failure GOOSE receiving soft pressing plates; the bus protection coordination two-state refers to the state that when the bus protection device works in the interval power failure of a circuit and a main transformer, the bus protection coordination quits the state of the corresponding interval startup failure GOOSE receiving soft pressing plate and the interval receiving soft pressing plate; the bus protection exit state refers to a state when the bus protection device exits all the GOOSE transmitting soft pressing plates, the GOOSE receiving soft pressing plates, the interval receiving soft pressing plates and the functional soft pressing plates and is put into maintenance of the pressing plates.
7. The method for dynamically controlling the state machine of the intelligent substation relay protection device according to claim 2, wherein the line protection device state transition triggering condition comprises: the device comprises a device running state, a decoration and overhaul hard pressing plate switching state, a functional soft pressing plate, a differential protection functional soft pressing plate, a reclosing soft pressing plate, a GOOSE tripping soft pressing plate and a switch failure sending soft pressing plate; the main transformer protection equipment state transition triggering conditions comprise: the device is in an operating state, a decoration and overhaul hard pressing plate switching state, a functional soft pressing plate, a GOOSE tripping soft pressing plate, a failure joint tripping GOOSE receiving soft pressing plate and a switch starting failure sending soft pressing plate; the bus protection equipment state transition triggering conditions comprise: the device is in an operating state, a decoration and overhaul hard pressing plate switching state, a functional soft pressing plate, a branch trip GOOSE sending soft pressing plate, a branch failure joint trip GOOSE sending soft pressing plate and a branch switch starting failure receiving soft pressing plate.
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| CN111143630B (en) * | 2019-11-26 | 2022-09-09 | 南京国电南自电网自动化有限公司 | Intelligent substation overhaul safety measure execution state checking method and device |
| CN113254545B (en) * | 2021-05-21 | 2023-02-03 | 国网河北省电力有限公司邯郸供电分公司 | Method for checking state of pressing plate of secondary equipment of intelligent substation |
| CN117294005B (en) * | 2023-09-13 | 2024-07-02 | 国网江苏省电力有限公司淮安供电分公司 | Protection operation mode defense early warning system and method for transformer substation line and transformer |
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