CN116031841A - Failure protection method and device for intelligent substation, substation and storage medium - Google Patents
Failure protection method and device for intelligent substation, substation and storage medium Download PDFInfo
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- CN116031841A CN116031841A CN202111247084.5A CN202111247084A CN116031841A CN 116031841 A CN116031841 A CN 116031841A CN 202111247084 A CN202111247084 A CN 202111247084A CN 116031841 A CN116031841 A CN 116031841A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application discloses a failure protection method for an intelligent substation, comprising the following steps: an intelligent transformer station is used as an object to configure a failure protection device; the failure protection device is connected into a station control layer network and a process layer network of the intelligent substation, and GOOSE sending link states and action signals of the interval protection device configured by the intelligent substation are collected in real time through the failure protection device, wherein the interval protection device is configured to protect line intervals and main transformer intervals of the whole substation; and when the failure protection device determines that all the GOOSE sending links of the target interval protection device are interrupted and the action signals of the target interval protection device are received, sending a remote tripping command to an adjacent substation of the intelligent substation configured with the target interval protection device through the failure protection device. According to the intelligent substation line interval and main transformer interval protection device GOOSE transmission link fault fast isolation method, faults are isolated fast when all the intelligent substation line interval and main transformer interval protection device GOOSE transmission links are interrupted, and safe and stable operation of a power grid is guaranteed.
Description
Technical Field
The present disclosure relates to protection of power grid accidents, and in particular, to a failure protection method and apparatus for an intelligent substation, a substation, and a storage medium.
Background
The relay protection secondary circuit plays a significant role in ensuring the safety, stable operation and the like of the power system.
The relay protection secondary circuit of the traditional transformer substation is connected through a cable, and the connection state of the relay protection secondary circuit cannot be monitored in real time. Particularly, a 110kV and below voltage class system is set to be in protection single configuration, when a primary system fails and a secondary outlet loop of a corresponding protection device is abnormal, even if the protection device judges the failure and sends out a tripping command, the failure cannot be timely isolated, and the failure must be isolated by waiting for the delay action of the remote backup protection of other adjacent substations. Because the cooperation relationship among the sections needs to be considered in the far backup protection, the action time of the system can not meet the requirement of system stability under serious conditions, and serious threat is brought to the safe and stable operation of the system.
Disclosure of Invention
Based on the above, various exemplary embodiments of the present application are directed to a failure protection method and apparatus for an intelligent substation, a substation, and a storage medium.
According to the failure protection method of the intelligent substation, when all the GOOSE transmitting links of the intelligent substation line interval and main transformer interval protection device are interrupted, faults can be isolated rapidly, and safe and stable operation of a power grid is guaranteed.
To achieve the above object, the present application provides a failure protection method for an intelligent substation, including
The method comprises the following steps:
step S100, connecting a failure protection device into the intelligent substation, and configuring the failure protection device by taking the intelligent substation as an object;
step S200, collecting GOOSE sending link states and action signals of at least one interval protection device configured in the intelligent substation in real time through the failure protection device, wherein the at least one interval protection device is configured to protect all line intervals and main transformer intervals of the intelligent substation; and
and step S300, when the failure protection device determines that the GOOSE transmission link of the at least one interval protection device is interrupted and the action signal transmitted by the at least one interval protection device is received, the failure protection device transmits a remote tripping command to an adjacent substation of the intelligent substation, wherein the remote tripping command is configured to instruct the adjacent substation to execute a tripping command.
In an embodiment, the plurality of adjacent substations are respectively connected with the intelligent substations in a communication manner, and the step of configuring the failure protection device includes:
step S120, each adjacent transformer substation is provided with a set of failure protection device; wherein each failure protection device is configured to protect all line intervals and main transformer intervals within the stations of the corresponding adjacent substation, respectively, each failure protection device is configured to collect and discriminate, in real time, GOOSE transmission link status and action signals of the respective interval protection devices of the line intervals and main transformer intervals, and to transmit the remote trip command, and the failure protection devices of the intelligent substation and the plurality of adjacent substations are configured to transmit the remote trip command to each other through a communication network.
In an embodiment, the step of accessing the failure protection apparatus to the intelligent substation includes:
step S140, the failure protection device is connected to a station control layer network and a process layer network of the intelligent substation in a communication mode; and
the step of collecting, in real time, the GOOSE sending link status of the interval protection device configured by the intelligent substation through the failure protection device includes:
step S220, the failure protection device directly acquires an alarm signal of the GOOSE sending link interruption through the station control layer network; and
and step S240, collecting the transmission link state of the protection trip GOOSE of the at least one interval protection device configured by the intelligent substation and the transmission link state of the starting failure GOOSE in real time through the failure protection device.
In an embodiment, the step of collecting, in real time, the GOOSE sending link status of the interval protection device configured by the intelligent substation through the failure protection device includes:
step S260, the failure protection device obtains an input signal of a GOOSE input link of the receiving device corresponding to the at least one interval protection device; and
step S270, determining the GOOSE transmission link state of the at least one gap protector according to the input signal of the GOOSE input link.
In one embodiment, the step of directly obtaining, by the failure protection device through the site-controlled layer network, the alarm signal of the GOOSE transmission link interruption includes:
step S222, when the intelligent terminal judges that the protection trip GOOSE transmission link of the at least one interval protection device is interrupted according to the input signal of the protection trip GOOSE input link, the intelligent terminal generates the alarm signal and sends the alarm signal to the station control layer network; and
step S224, after the failure protection device directly obtains the alarm signal through the site control layer network, determining that the protection trip GOOSE of the at least one interval protection device sends a link interrupt.
In an embodiment, the collecting, by the failure protection device, the status of the transmission link of the failed GOOSE initiated by the at least one interval protection device configured by the intelligent substation in real time further includes:
step S246, the failure protection device determines the status of the failed GOOSE sending link of the at least one interval protection device by acquiring the input signal of the input link of the bus differential protection GOOSE of the receiving device corresponding to the at least one interval protection device.
In an embodiment, the step of collecting, in real time, by the failure protection device, a transmission link state of the at least one interval protection device configured by the intelligent substation, where the transmission link state of the failed GOOSE is started, further includes:
in step S248, when the bus protection determines that the active failed GOOSE transmission link of the at least one interval protection device is interrupted based on the input signal of the active failed GOOSE input link, the bus protection generates the alarm signal and sends the alarm signal up to the site control layer network to determine that the active failed GOOSE transmission link of the at least one interval protection device is interrupted.
In an embodiment, the step of collecting, in real time, the action signal of the at least one interval protection device configured by the intelligent substation through the failure protection device includes:
step S280, the failure protection device is communicatively connected to the configured process layer network of the intelligent substation, so as to collect, in real time, the action signals of the at least one interval protection device of all line intervals and main transformer intervals of the configured intelligent substation.
In an embodiment, the method further comprises:
step S290, when the at least one interval protection device in the intelligent substation fails in the area, the at least one interval protection device sends an action signal to the process layer network, and the failure protection device collects the action signal of the interval protection device through the process layer network.
In an embodiment, said sending, by said failure protection device, said remote trip command to said adjacent substation of said intelligent substation configuring said at least one interval protection device comprises:
step S320, when the failure protection device determines that the protection trip GOOSE of the at least one interval protection device and the starting failure GOOSE send link are all interrupted, and the action signal of the at least one interval protection device is received, the failure protection device sends the remote trip command to the failure protection device of the adjacent substation after short delay confirmation to avoid normal signal interference, so that the failure protection device of the adjacent substation respectively trips a power transmission line breaker connected with the intelligent substation, and the adjacent substation trips.
In yet another aspect of the present application, there is also provided a failure protection apparatus including a memory storing a computer program and a processor implementing steps of a failure protection method when the processor executes the computer program.
In yet another aspect of the present application, there is further provided an intelligent substation, including the failure protection apparatus of the above embodiment.
In yet another aspect of the present application, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of a fail safe method.
According to the technical scheme, the intelligent substation is provided with the failure protection device, so that the problem that the GOOSE sending link is completely interrupted due to the abnormality of the intelligent substation or the abnormality of an external optical fiber loop, and the system failure cannot be timely isolated is solved, and the safe and stable operation of a power grid is ensured.
Drawings
Fig. 1 is an application scenario of a failure protection apparatus of an intelligent substation according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a communication link between failure protection device configurations of a plurality of intelligent substations provided in accordance with an implementation of the present application;
FIG. 3 is a logic diagram of the operation of the failsafe performed by the failsafe apparatus of the embodiment of FIG. 1, wherein X represents B and Y represents AB, as exemplified by the AB line of the intelligent substation B site of FIG. 1;
fig. 4 is a flow chart of a failure protection method of an intelligent substation according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application is provided in order to enable those skilled in the art to better understand and practice the present application, and is not intended to be limiting of the present application.
The inventor finds that based on the problems, the two loops of the intelligent substation are connected through the optical cable, so that the connection state of the two loops can be monitored in real time, and a trigger is provided for solving the problems.
Referring to fig. 1 as an example, first, a substation is set for the illustrated intelligent substation area network, and a set of failure protection devices is configured at A, B, C, D stations, and remote tripping commands are transmitted between the failure protection devices a and B, the failure protection devices B and C, and the failure protection devices B and D through a communication network, as shown in fig. 2.
Secondly, taking the B station AB line protection device in FIG. 1 as an example, the B station failure protection device is connected into the station control layer network and the process layer network, and the protection tripping of AB line protection and the starting failure GOOSE sending link state are collected in real time. When the receiving AB line protection tripping GOOSE input link of the AB line interval intelligent terminal is interrupted, the intelligent terminal sends the alarm signal to a station control layer network, and a station B failure protection device directly acquires the alarm signal through the station control layer network to judge the interruption of the protection tripping GOOSE sending link of the AB line protection; when the receiving AB line protection starting failure GOOSE input link of the AB line interval bus protection is interrupted, the bus protection sends the alarm signal to the station control layer network, and the B station failure protection device directly acquires the alarm signal through the station control layer network to judge the starting failure GOOSE sending link interruption of the AB line protection. At this time, if the line AB fails in the area, the AB line interval protection device will send an action signal to the process layer network, and the B station failure protection device collects the action signal of the AB line protection device through the process layer network, so after short delay confirmation, sends a remote trip command to the failure protection devices A, C, D of all adjacent substations, and quickly trips CB1, CB4 and CB6 to isolate the failure.
In summary, the implementation of the scheme is used for configuring the failure protection device for the intelligent substation, solves the problem that the GOOSE transmission link is completely interrupted due to the abnormality of the whole station interval protection device or the abnormality of an external optical fiber loop, so that the system failure cannot be timely isolated, and ensures the safe and stable operation of the regional power grid.
Various exemplary embodiments of the present application provide a failure protection method for an intelligent substation, as shown in fig. 4, including the following steps:
and step S100, the failure protection device is connected into the intelligent substation, and the failure protection device of the intelligent substation is configured.
The failure protection device may be a failure protection device, for example, a circuit breaker failure protection device, which can utilize protection action information of a fault device and current information of a failure circuit breaker to form a judgment of failure of the circuit breaker when a tripping command is sent out by relay protection action of the fault electrical device and the circuit breaker fails, and can cut off other related circuit breakers in the same station in a shorter time period, so that a power failure range is limited to be minimum, stable operation of the whole power grid is ensured, and serious burning loss of fault elements such as a generator and a transformer and breakdown and disintegration accidents of the power grid are avoided.
The configuration of the failure protection device of the intelligent substation refers to setting proper parameters and installing the failure protection device into the intelligent substation. It is understood that a person skilled in the art should know how to configure appropriate parameters to enable the failure protection apparatus to be connected to the intelligent substation, and this application will not be repeated.
Step 200, collecting, by the failure protection device, GOOSE sending link status and action signals of at least one interval protection device configured by the intelligent substation in real time, wherein the at least one interval protection device is configured to protect all line intervals and main transformer intervals of the intelligent substation.
It should be noted that, the intervals in the power system refer to some tightly connected parts with some common functions in the substation. The identification distinction of these parts is very important for service (which parts are disconnected while having minimal impact on the rest of the substation) or for extension planning (which parts have to be added if a new line is added). These parts are called intervals and are managed by devices called "interval controllers" in general, provided with a set of protections called "interval protections".
It should be noted that, the GOOSE sending link state refers to that the device does not receive the subscribed GOOSE message within a certain period of time (usually 20S), and reports that the GOOSE link communication is interrupted. And the devices are used for detecting the state of a communication link by sending GOOSE messages at regular time among devices communicating through a GOOSE protocol, and the devices are judged to be interrupted when the next frame of GOOSE message is not received within 2 times of the allowed survival time of the received messages. The time to live allowed to be sent as a configurable parameter of the GOOSE message is generally configured to be 10S, and is unchanged after the device configuration is completed, so that the 20S normally determines that the link is broken if the required GOOSE message is not received.
The operation signal means that the protection operation of the relay protection device must be triggered under the condition of an abnormality of the power system, so the device has a fault detection function. Specifically, the relay protection device is closely related to the power system, so that the operation condition of the power system is monitored in the working process, the monitoring can judge the abnormality of the current related data of the power line according to the manually set threshold value, and the protection action of the device is excited correspondingly when the abnormality of the data of the voltage, fluctuation and the like of a certain line of the power system is found in the process. Relay protection actions have a variety of manifestations: under the abnormal condition of the data of the power system, the device can send out an alarm, the alarm can enter the power workstation terminal through a signal transmission path, and the fault early warning device is excited to inform the personnel to repair the power workstation terminal; aiming at a fault line, a switch is controlled to be tripped to realize power-off isolation operation, under the condition of no power transmission, the fault cannot be affected continuously, if the power fault belongs to a temporary fault, the power supply is recovered after reclosing, and if the power fault belongs to a permanent fault, the power supply is treated manually, thereby ensuring the safety of a power system
The line interval and the main transformer interval refer to a transformer substation interval, which is a part of a transformer substation, and includes connection of an ultra-high (or high) voltage switching device and a power line, a power transformer, and the like to a bus bar system of the transformer substation, and protection, control, and measurement devices of the power line, the power transformer, and the like. If the spacing is for connecting the power cord to the bus bar system, then it is referred to as the line spacing; if used to connect a power transformer to a bus bar system, it is referred to as a transformer bay. Typically, a substation contains many line and transformer bays and other bays. All the spacings are similar to the line spacings. In the design and construction of the transformer substation, the transformer substation is formed by respectively combining parts such as an incoming line, a main transformer high voltage, a main transformer low voltage outgoing line and the like, and each part is called an interval.
And step S300, when the failure protection device determines that the GOOSE transmission link of the at least one interval protection device is interrupted according to the GOOSE transmission link state of the at least one interval protection device and receives the action signal sent by the at least one interval protection device, the failure protection device sends a remote tripping command to an adjacent substation of the intelligent substation, wherein the remote tripping command is configured to instruct the adjacent substation to execute a tripping command.
The adjacent substation refers to a direct communication connection with the intelligent substation, in other words, there is no third substation between the communication links of the intelligent substation and the adjacent substation. And the remote tripping command sent by the failure protection device is sent to the adjacent substation, and when the adjacent substation receives the remote tripping command, the tripping command is executed, so that tripping is executed on the adjacent substation.
In another embodiment, a plurality of adjacent substations can also be provided, and the plurality of adjacent substations are also respectively and directly connected with the intelligent substations in a communication way.
In this embodiment, the step of configuring the failure protection apparatus in step S100 may further include the following steps.
Step S120, each adjacent transformer substation is provided with a set of failure protection device; wherein each failure protection device is configured to protect all line intervals and main transformer intervals within the stations of the corresponding adjacent substation, respectively, each failure protection device is configured to collect and discriminate, in real time, GOOSE transmission link status and action signals of the respective interval protection devices of the line intervals and main transformer intervals, and to transmit the remote trip command, and the failure protection devices of the intelligent substation and the plurality of adjacent substations are configured to transmit the remote trip command to each other through a communication network.
The difference between the present embodiment and the foregoing embodiment is that the number of adjacent substations is only plural, and the functions of the failure protection device of each adjacent substation and the failure protection device of the intelligent substation are the same, which is not described again.
In an embodiment, the step of accessing the failure protection apparatus to the intelligent substation in step S100 may further include the following steps.
And step S140, the failure protection device is communicated with a station control layer network and a process layer network of the intelligent substation.
It should be noted that, the station control layer includes subsystems such as an automation system, a station domain control system, a communication system, a time synchronization system, etc., realizes measurement and control functions for a total station or one or more primary devices, and completes related functions such as data acquisition and supervisory control (SCA-DA), operation locking, synchronous phasor acquisition, electric energy acquisition, protection information management, etc. The station control layer function should be highly integrated, and can be implemented in one computer or embedded device, or can be distributed among multiple computers or embedded devices.
The process layer is used for completing real-time electric quantity detection of electric power operation, state parameter detection of operation equipment and operation control execution and driving. The analog quantity/switching quantity acquisition and the execution of control commands are known as. Only the digital transformer substation, namely the intelligent transformer substation, has a process layer, and the conventional transformer substation has a spacer layer and a station control layer, and has no process layer. The process layer devices include primary devices such as generators, transformers, bus bars, circuit breakers, disconnectors, current/voltage transformers, merging units, intelligent terminals. The combiner is connected to the output of the transformer and performs data transfer with some of the inter-bay combiners. The intelligent terminal can complete certain control actions.
In this embodiment, the step of collecting, in real time, the GOOSE sending link status of the interval protection device configured by the intelligent substation through the failure protection device in step S200 may further include the following steps.
In step S220, the failure protection device directly obtains the alarm signal of the GOOSE sending link interruption through the station control layer network.
In this embodiment, step S200 further includes step S240, where the failure protection device acquires, in real time, a transmission link state of a protection trip GOOSE of the at least one interval protection device configured in the intelligent substation and a transmission link state of a start failure GOOSE.
It should be noted that, the transmission link state of the protection trip GOOSE and the transmission link state of the start failure GOOSE are both transmission link states of GOOSE.
In an embodiment, the step of collecting, in real time, the GOOSE sending link status of the interval protection device configured by the intelligent substation through the failure protection device in step S220 may further include the following steps.
Step S260, the failure protection device obtains an input signal of a GOOSE input link of the receiving device corresponding to the at least one interval protection device; and
step S270, determining the GOOSE transmission link state of the at least one gap protector according to the input signal of the GOOSE input link.
In an embodiment, the step of directly obtaining, by the failure protection apparatus in step S240, the alarm signal of the GOOSE transmission link interruption through the site control layer network may further include the following steps.
Step S222, when the intelligent terminal determines that the protection trip GOOSE transmission link of the at least one interval protection device is interrupted according to the input signal of the protection trip GOOSE input link, the intelligent terminal generates the alarm signal and sends the alarm signal to the station control layer network.
Step S224, when the failure protection device directly obtains the alarm signal through the site control layer network, determining that the protection trip GOOSE of the at least one interval protection device sends a link interrupt.
The failure protection device is in communication connection with the station control layer network and monitors whether an alarm signal is transmitted to the station control layer network in real time. And when the alarm signal is monitored, judging that the protection tripping GOOSE transmits the link interrupt.
In an embodiment, the step of collecting, in real time, by the failure protection device, the transmission link status of the at least one interval protection device configured in the intelligent substation, where the failure GOOSE is started, in step S240, further includes the steps of:
step S246, the failure protection device determines the status of the failed GOOSE sending link of the at least one interval protection device by acquiring the input signal of the input link of the bus differential protection GOOSE of the receiving device corresponding to the at least one interval protection device.
It should be noted that, the bus differential protection is an important system device for ensuring the safe and stable operation of the power grid, and the safety, reliability, sensitivity and rapidity of the bus differential protection have decisive significance for ensuring the safety of the power grid in the whole area.
In an embodiment, the step of collecting, in real time, the status of the transmission link of the at least one interval protection device configured in the intelligent substation, which activates the failed GOOSE, through the failed protection device in step S240 further includes the following steps.
In step S248, when the bus protection determines that the active failed GOOSE transmission link of the at least one interval protection device is interrupted based on the input signal of the active failed GOOSE input link, the bus protection generates the alarm signal and sends the alarm signal up to the site control layer network to determine that the active failed GOOSE transmission link of the at least one interval protection device is interrupted.
The bus bar is an important device of the power system, and plays a very important role in the whole power transmission and distribution system. The bus bar connection has a lot of devices and the electrical wiring is complex. The related equipment is frequently operated, and bus faults can be caused by insulation breakdown outside the equipment, mechanical damage, foreign matters outside the equipment, misoperation of personnel and the like.
Bus faults are one of the most serious faults of the power system. Once a problem arises, all equipment connected to the bus must be cut off, potentially resulting in a large area of power outage. If the bus faults of the hub transformer substation cannot be timely removed, the accidents of stable damage of the power system can be possibly caused. Because the bus is positioned in the transformer substation, the probability of bus faults is reduced by regular inspection and maintenance, and even so, the bus faults cannot be completely avoided, and the protection with perfect performance needs to be configured, so that the faults can be timely removed when the bus faults, and the safe and stable operation of the power system is ensured.
In an embodiment, the step of collecting, in real time, the action signal of the at least one interval protection device configured by the intelligent substation through the failure protection device includes:
step S280, the failure protection device is communicatively connected to the configured process layer network of the intelligent substation, so as to collect, in real time, the action signals of the at least one interval protection device of all line intervals and main transformer intervals of the configured intelligent substation.
In an embodiment, the method further comprises:
step S290, when the at least one interval protection device in the intelligent substation fails in the area, the at least one interval protection device sends an action signal to the process layer network, and the failure protection device collects the action signal of the interval protection device through the process layer network.
In an embodiment, the step of sending the remote trip command to the adjacent substation of the intelligent substation configuring the at least one interval protection device through the failure protection device of step S300 may further include the following steps.
Step S320, when the failure protection device determines that the protection trip GOOSE of the at least one interval protection device and the starting failure GOOSE send link are all interrupted, and the action signal of the at least one interval protection device is received, a short delay is used for confirming, so as to avoid normal signal interference, and then send the remote trip command to the failure protection device of the adjacent substation, so that the failure protection device of the adjacent substation respectively trips a power transmission line breaker connected with the intelligent substation, and the adjacent substation trips.
In another aspect of the present application, there is also provided a failure protection apparatus including a memory storing a computer program and a processor implementing steps of a failure protection method when the processor executes the computer program.
In yet another aspect of the present application, there is further provided an intelligent substation, including the failure protection apparatus of the above embodiment.
In yet another aspect of the present application, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the rights failure protection method.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A failure protection method for an intelligent substation, comprising:
step S100, connecting a failure protection device into the intelligent substation, and configuring the failure protection device by taking the intelligent substation as an object;
step S200, collecting GOOSE sending link states and action signals of at least one interval protection device configured in the intelligent substation in real time through the failure protection device, wherein the at least one interval protection device is configured to protect all line intervals and main transformer intervals of the intelligent substation; and
and step S300, when the failure protection device determines that the GOOSE transmission link of the at least one interval protection device is interrupted according to the GOOSE transmission link state of the at least one interval protection device and receives the action signal sent by the at least one interval protection device, the failure protection device sends a remote tripping command to an adjacent substation of the intelligent substation, wherein the remote tripping command is configured to instruct the adjacent substation to execute a tripping command.
2. The malfunction protection method for an intelligent substation according to claim 1, wherein the adjacent substations are plural, the plural adjacent substations are respectively connected in communication with the intelligent substations, the step of configuring the malfunction protection apparatus includes:
step S120, each adjacent transformer substation is provided with a set of failure protection device; wherein each failure protection device is configured to protect all line intervals and main transformer intervals within the stations of the corresponding adjacent substation, respectively, each failure protection device is configured to collect and discriminate, in real time, GOOSE transmission link status and action signals of the respective interval protection devices of the line intervals and main transformer intervals, and to transmit the remote trip command, and the failure protection devices of the intelligent substation and the plurality of adjacent substations are configured to transmit the remote trip command to each other through a communication network.
3. The failure protection method for intelligent substation according to claim 1, wherein,
the step of connecting the failure protection device to the intelligent substation comprises the following steps:
step S140, the failure protection device is connected to a station control layer network and a process layer network of the intelligent substation in a communication mode; and
the step of collecting, in real time, the GOOSE sending link status of the interval protection device configured by the intelligent substation through the failure protection device includes:
step S220, the failure protection device directly obtains the failure protection device through the station control layer network
GOOSE sends an alarm signal of link interruption; and
step S240, collecting, by the failure protection device, the GOOSE sending link state of the at least one interval protection device configured by the intelligent substation in real time, where the GOOSE sending link state includes a protection trip GOOSE sending link state and a starting failure GOOSE sending link state.
4. A failsafe protection method for an intelligent substation as claimed in claim 3, wherein the step of collecting in real time the GOOSE transmission link status of the interval protection device for which the intelligent substation has been configured by the failsafe protection device comprises:
step S260, the failure protection device obtains an input signal of a GOOSE input link of the receiving device corresponding to the at least one interval protection device; and
step S270, determining the GOOSE transmission link state of the at least one interval protection device according to the input signal of the GOOSE input link;
the step of directly obtaining the alarm signal of the GOOSE sending link interruption by the failure protection device through the station control layer network comprises the following steps:
step S222, when the intelligent terminal judges that the protection trip GOOSE transmission link of the at least one interval protection device is interrupted according to the input signal of the protection trip GOOSE input link, the intelligent terminal generates the alarm signal and sends the alarm signal to the station control layer network; and
step S224, after the failure protection device directly obtains the alarm signal through the site control layer network, determining that the protection trip GOOSE of the at least one interval protection device sends a link interrupt.
5. The malfunction protection method for an intelligent substation according to claim 3, wherein the collecting, by the malfunction protection device, the transmission link status of the at least one interval protection device configured for the intelligent substation, which activates malfunctioning GOOSE, in real time, further comprises:
step S246, the failure protection device determines the status of the failed GOOSE transmission link started by the at least one interval protection device by acquiring an input signal of a bus differential protection GOOSE input link of the receiving device corresponding to the at least one interval protection device;
the step of collecting, in real time, by the failure protection device, the status of a transmission link of the at least one interval protection device configured in the intelligent substation, where the failure GOOSE is started, further includes:
in step S248, when the bus protection determines that the active failed GOOSE transmission link of the at least one interval protection device is interrupted based on the input signal of the active failed GOOSE input link, the bus protection generates the alarm signal and sends the alarm signal up to the site control layer network to determine that the active failed GOOSE transmission link of the at least one interval protection device is interrupted.
6. A failure protection method for an intelligent substation according to claim 3, characterized in that said step of collecting in real time said action signals of said at least one interval protection device, which the intelligent substation has been configured, by means of said failure protection device comprises:
step S280, the failure protection device is in communication access to the configured process layer network of the intelligent substation, so as to acquire the action signals of the at least one interval protection device of all line intervals and main transformer intervals of the configured intelligent substation of the intelligent substation in real time;
step S290, when the at least one interval protection device in the intelligent substation fails in the area, the at least one interval protection device sends an action signal to the process layer network, and the failure protection device collects the action signal of the interval protection device through the process layer network.
7. A failure protection method for an intelligent substation according to claim 3, characterized in that said sending, by said failure protection device, said remote trip command to said adjacent substation of said intelligent substation configuring said at least one interval protection device comprises:
step S320, when the failure protection device determines that the protection trip GOOSE of the at least one interval protection device and the starting failure GOOSE send link are all interrupted, and the action signal of the at least one interval protection device is received, the failure protection device sends the remote trip command to the failure protection device of the adjacent substation after short delay confirmation to avoid normal signal interference, so that the failure protection device of the adjacent substation respectively trips a power transmission line breaker connected with the intelligent substation, and the adjacent substation trips.
8. A malfunction protection device comprising a memory and a processor, said memory storing a computer program, characterized in that the processor implements the steps of the method according to any of claims 1 to 7 when executing said computer program.
9. An intelligent substation, characterized in that it comprises a failure protection device according to claim 8.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111247084.5A CN116031841A (en) | 2021-10-26 | 2021-10-26 | Failure protection method and device for intelligent substation, substation and storage medium |
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| CN202111247084.5A CN116031841A (en) | 2021-10-26 | 2021-10-26 | Failure protection method and device for intelligent substation, substation and storage medium |
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