CN103036164B - A kind of based on preengaging logic mother blocking method containing of service tracks - Google Patents

Abstract

The invention discloses a service tracking-based bus coupler blocking method with reservation logic. The line bay isolating switch and the bus tie circuit breaker with a locking relationship are in different bays. When the isolating switch is operated, the service tracking module of the isolating switch will track the operation control command and send it in the form of a control command service report to Service tracking module for tie breakers. After receiving the report message, the service tracking module of the bus tie circuit breaker analyzes the content of the message and changes the value of the reservation logic variable in the blocking module to start or cancel the reservation. When the reservation is successful, the bus tie circuit breaker will not be operated . The invention can well prevent the concurrent operation of two switchgears with a locking relationship, avoid locking errors caused by simultaneous operations, and prevent catastrophic accidents caused by locking errors.

Description

A method of bus coupler locking with reservation logic based on service tracking

technical field

The invention relates to a locking method across intervals of a substation, in particular to a bus coupling locking method with reservation logic based on service tracking.

Background technique

During the normal operation of the power system, due to the equipment maintenance and the transformation of the operation mode, the switching operation of the system must be carried out frequently. During substation cross-bay operation, whether the isolating switch of the line bay and the bus tie bay circuit breaker can be closed or disconnected depends on whether the locking relationship between them is correct. During the actual operation of the power grid, there may be a danger that two switchgears are operated at the same time. When the two bays are operated by different subjects at the same time, the blocking information will be wrong, that is, while the isolating switch of the line bay is operated by the man-machine interface, the circuit breaker of the bus coupler bay also receives the operation command issued by the control center. The operations of the two intervals all satisfy the blocking condition, and both operations can be completed. However, if the operation process is carried out at the same time, the dynamic change of the switch position will make the blocking condition of the actual operation action no longer satisfied, resulting in misoperation and catastrophic accidents in the power grid. Accidents caused by misoperation account for a considerable proportion in the power system, which poses a great threat to the safe and stable operation of the system.

Contents of the invention

In order to solve the above-mentioned technical problems existing in inter-interval locking of existing substations, the present invention provides a highly reliable service tracking-based bus tie locking method with reservation logic.

The technical scheme that the present invention solves the problems of the technologies described above comprises the following steps:

1) The line interval intelligent man-machine interface sends a switch selection request command, and selects the switch A to be operated;

2) When the switch control module of switch A receives a switch selection request command, when the response of the switch control module is a negative response, the operation will exit; the response of the switch control module is a positive response, indicating that the request command is passed;

3) The switch control module returns the positive response signal to the intelligent man-machine interface, and the intelligent man-machine interface sends an operation command to the switch control module of switch A; at the same time, the service tracking module inside switch A will automatically track the positive response and form a message, Send to the service tracking module inside the bus tie circuit breaker B that has a blocking relationship with switch A;

4) After the switch control module of switch A receives the command, it detects the internal execution environment. After the internal execution environment detection passes, it detects that the blocking module provides the blocking logic value stored in the node in real time. When the blocking logic value is 0, Do not execute the operation command and exit the operation; if the blocking logic value is 1, it can be operated and a positive response is returned; at the same time, all control services will be tracked by the service tracking module inside switch A;

5) The switch control module of switch A returns a positive response, and closes switch A;

6) After switch A is closed, it will send a closure report and command termination service report to the switch control module and the intelligent man-machine interface, and the service tracking module inside switch A will also track all control services;

7) The intelligent man-machine interface at the end of the switch receives an order to terminate the service report and exit the operation process;

8) The service tracking module of switch A sends the tracked control command service information to the service tracking module of bus tie circuit breaker B in the form of a report, and the service tracking module of bus tie circuit breaker B uses the reservation logic algorithm based on the analysis of control commands , transmit the reservation logic variable value to the blocking module of bus tie circuit breaker B;

9) When the control command service information tracked by the service tracking module is the positive response to the switch selection request command, the value of the parsed reservation logic variable is 0; The blocking module performs an AND operation, and the value is 0; the operation of the bus tie circuit breaker B is blocked, and the bus tie circuit breaker B is reserved successfully;

10) When the control command service information tracked by the service tracking module is the cancellation operation, the negative response of the operation, the response of the command operation time-out, and the service of the command termination, the parsed reservation logic variable value is 1; The improved blocking algorithm of bus tie circuit breaker B performs an AND operation, and the value is the value of the original logic expression; the reservation of bus tie circuit breaker B is canceled.

The technical effect of the present invention is that: the locking method whose main purpose is to realize the safety and error prevention of switching operation is an important mechanism that needs to be realized in the substation construction process, and the cross-interval locking method with reservation function can well prevent two The simultaneous operation of a switchgear avoids latching errors caused by simultaneous operations. The use of service tracking technology to build a cross-interval reservation blocking architecture has very important advantages in terms of function realization and configuration feasibility. The design and realization of each function are well compatible with the IEC61850 standard. The invention can respond to changes in the environment independently, and has strong autonomy; the information model and communication service adopted fully comply with the IEC61850 standard, and the functional modules automatically sense the environment to operate, with distributed and loosely coupled characteristics, and are easy to reuse and refactoring.

Description of drawings

Fig. 1 is the overall schematic diagram of the present invention.

Fig. 2 is a diagram of two main bodies simultaneously operating switches in two compartments.

Fig. 3 is a flowchart of the present invention.

Fig. 4 is a functional block diagram of reporting and services of the present invention.

FIG. 5 is a schematic diagram of the implementation of the control command service tracking report of the present invention.

Fig. 6 is a flow chart of the reservation logic algorithm of the present invention.

Fig. 7 is a diagram showing the implementation model of the blocking module including reservation logic in the present invention.

detailed description

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Referring to Figure 1 and Figure 2, in view of the problem that the simultaneous operation of two intervals leads to blocking errors and misoperations, a method of adding reservation blocking logic is proposed to construct a cross-interval blocking method with reservation logic variables. The line bay isolating switch and the bus tie circuit breaker are in different bays. When the isolating switch is operated, the service tracking module inside the switch will track the operation control command and send it to the bus tie circuit breaker through the control command service report. After receiving the report message, the bus tie circuit breaker analyzes the content of the message and changes the value of the reservation logic variable in the blocking module to start/cancel the reservation. When the appointment is successful, the bus tie circuit breaker will not be operated, avoiding the occurrence of blocking errors.

For the line bay isolating switch 20512 and the bus tie bay circuit breaker 2012 in Fig. 2, the following explanations are made in conjunction with the flow chart in Fig. 3:

1) The line interval intelligent man-machine interface sends a switch selection request command to select the isolating switch 20512 to be operated;

2) When the switch selection request command is sent to the switch control module of the switch 20512, the switch control module responds to the request. A positive response indicates that the request command is passed, and a negative response indicates that the request is unsuccessful. When the answer is a negative answer, the operation will exit;

3) When the response is a positive response, the response signal will be returned to the smart man-machine interface, and the smart man-machine interface will send an operation command to the switch control module of the switch 20512. At the same time, the service tracking module inside the switch 20512 will track the positive response.

The function of the service tracking module is to enable the bus tie bay circuit breaker (such as circuit breaker 2012) to monitor the control command service for operating the line bay disconnector (such as switch 20512), and report the monitored messages through the report control block inside the module Sent to the service tracking module of the coupler bay circuit breaker.

The report control block inside the service tracking module monitors all data objects of the data set referenced by the report control block through the event monitor, and generates an internal notification and sends it to the report processor under customized trigger conditions, and the report processor generates reports according to the control block attribute configuration and send. The content sent by the report is the corresponding attribute in the option field of the report control block. According to the content that the monitoring client needs to monitor, set the attribute value of the corresponding option field to "TRUE" and send it. The principle of the report is shown in Figure 4.

FIG. 5 illustrates the process of service tracking by taking the control command to operate the line bay isolating switch (such as the switch 20512) as an example.

(1) The command service parameters sent by the control command will set the attribute parameters of the control command operation object of the line bay isolation switch, and the corresponding attribute values in the control command operation object will be updated according to the flow of the state machine.

(2) The data attributes of the tracking data objects in the service tracking module will also map the service parameters corresponding to the control commands. Among them, attributes such as data reference, service type, error code, service origin, and service completion time identifier in the public data attribute class are not directly mapped to the values in the service parameters, but are obtained during the service process or after the service ends.

(3) The mapping of the data reference attribute in the tracking data object is finally implemented. When the control object reference service parameter value in the control command response is mapped to the data reference attribute, and the event monitor in the service tracking report control block detects that the data reference attribute in the tracking data object meets the trigger condition, it will include the tracking data object attribute value The message sent to the bus tie circuit breaker, the selection of the content of the message is determined according to the instance of the report control block.

(4) After receiving the command, the switch control module of switch 20512 detects the internal execution environment, including whether there are other commands being executed, whether it is locked by certain conditions, detects the mode of the switch control module, etc., and determines whether the command can be executed . After the internal execution environment detection of the switch control module passes, the detection blocking module provides the blocking logic value stored in the node in real time to determine whether the operation command can perform the next operation. When the blocking logic value is 0, the operation command cannot be executed, and when it is 1, it can be operated. If the command can be executed, return a positive response, otherwise, it means that the conditions are not met, return a negative response or cancel the operation command. At the same time, the service tracking module inside the switch 20512 tracks all control services, and generates a message to send to the service tracking module of the circuit breaker 2012 .

(5) When the return signal is a positive response, the switch 20512 is closed; when the return signal is a negative response, the operation process will exit.

(6) After the switch 20512 is closed, it will send a closing report and a command termination service report to the switch control module and the intelligent man-machine interface. At the same time, the service tracking module inside the switch 20512 will also track all control services, and generate a message to send to the service tracking module of the circuit breaker 2012 .

(7) The intelligent man-machine interface at the 20512 end of the switch receives an order to terminate the service report and exit the operation process.

(8) The service tracking module of the switch 20512 sends the tracked control command service information to the service tracking module of the bus tie circuit breaker 2012 in the form of a report. It is transmitted to the blocking module of the circuit breaker 2012 in the form of an internal signal.

The reservation logic algorithm based on control command analysis is shown in Figure 6, and the specific method is as follows:

When the switch selection request command is positively answered, the controlled object enters the ready state and waits for the arrival of the operation request command. At this time, it should send reservation information to the relevant switch that has a locking relationship with it. When the switch selection request command gets a negative response, the controlled object returns to the unselected state.

When the issued operation request command is positively responded, it indicates that the control operation command has been executed. When a negative response is obtained, it means that the control operation command has not been executed, and the state machine returns to an unselected state. At this time, a reservation cancellation message should be sent to the reserved party to cancel the previous operation reservation.

When the control operation command is finally executed, it will return a confirmation message or order to terminate the service to indicate whether the operation is in place. But no matter whether the operation is in place, when receiving these two messages, the state machine will return to the unselected state and wait for the next operation. That is, the reservation requesting party should send a reservation cancellation message to the reserved party to cancel the previous operation reservation. Whenever a cancel operation command is received during the whole process, the state machine will return to the unselected state, and the reserved party will cancel the reservation.

Therefore, when the report message received by the service tracking module of the circuit breaker 2012 of the reserved party contains the switch selection request command positive response information, the reservation logic variable value is set to 0. And when the received message includes cancellation operation, negative response of operation, response of command operation time-out, and service information of command termination, set the reservation logic variable value to 1.

(9) When the reservation logic variable value is 0, according to the improved blocking algorithm containing the reservation logic variable, the blocking logic expression of circuit breaker 2012 is (Where 2012R is reservation logic), the operation result is 0, the operation of the circuit breaker 2012 is blocked, and the circuit breaker 2012 is reserved successfully.

(10) When the value of the parsed reservation logic variable is 1, according to the improved blocking algorithm containing the reservation logic variable, the blocking module of the circuit breaker 2012 performs an AND operation, and the value is the value of the original logic expression. The reservation of circuit breaker 2012 is released.

The improved locking algorithm including reserved logic variables is shown in Figure 7, and the details are as follows:

The blocking model mainly includes two modules of communication and blocking. Among them, the communication module is responsible for the goose message communication between each switch and circuit breaker. When the status of each intelligent electronic device in the substation changes, it will immediately send the goose message at high frequency to update the real-time database. When no change occurs, the goose message is also sent, but the goose message is still sent at a lower fixed frequency to maintain the real-time database. The realization of the blocking module mainly includes combined data, reservation logic and real-time database.

The CILO logical node receives the position information of other switches through the communication module, stores them in the real-time database, and updates them in real time according to the received goose messages. The real-time database contains the position states and logic values of all switches that have a blocking relationship with the 2012 circuit breaker, and the results of the combined conditions are calculated from these related logic values according to the blocking rules. The final blocking condition of the switch is logically ANDed by the combined condition and reservation logic, and the final blocking condition value is obtained and stored in the CILO value. This logic value will be updated and stored in the CILO value in real time. When any switch position with a locking relationship changes, it may cause a change in the locking logic value. When the operation command reaches the switch control module, it will detect whether the locking relationship is correct, if it is correct, perform the operation, otherwise cancel the operation. For example, for the bus-tie bay circuit breaker 2012, its original locking logic expression is

(1);

When the reservation mechanism is adopted, the blocking logic expression of the circuit breaker 2012 is

(where 2012R is reservation logic) (2);

The blocking result can be obtained by substituting the reservation logic variable value analyzed by the service tracking module of the circuit breaker 2012 into formula (2).

Claims (1)

1., based on preengaging a logic mother blocking method containing of service tracks, its step is as follows:

1) line segregation Intelligent Human-Machine Interface transmit button selectes request command, the selected switch A that namely will operate;

2) switch control module of switch A is received switch and is selected request command, and when the response of this switch control module is negative acknowledge, operation will be exited; The response of this switch control module, for just to reply, represents that request command passes through;

3) positive answer signal is returned to Intelligent Human-Machine Interface by switch control module, and Intelligent Human-Machine Interface is to the switch control module transmit operation order of switch A; Meanwhile, automatic tracing is just replied by the service tracks module of switch A inside, forms message, sends to the service tracks module of the bus B inside that there is latching relation with switch A;

4) switch control module of switch A upon command, detects inner execution environment, and inner execution environment detects by rear, detect lock modules again and the latching logic value leaving node in is provided in real time, when latching logic value is 0, undo order, exits operation; Latching logic value is 1 operation, returns and just replys; Meanwhile, all control services are all followed the trail of by the service tracks module of switch A inside;

5) switch control module of switch A returns and just replys, and carries out closed procedure to switch A;

6) closed for transmission report and order are stopped service report to switch control module and Intelligent Human-Machine Interface after closing by switch A, and the service tracks module of switch A inside is also by control services all for tracking;

7) switch A holds Intelligent Human-Machine Interface to receive order and stops service report, exits operating process;

8) the control command information on services tracked is sent to the service tracks module of bus B by the service tracks module of switch A with the form of report, the reservation logical algorithm of service tracks module by resolving based on control command of bus B, sends the lock modules of bus B to by reservation logical variable value;

9) when the control command information on services that service tracks module tracks be switch select the just response of request command time, the reservation logical variable value parsed is 0; According to the improvement lockout algorithm containing reservation logical variable, the lock modules of bus B is done and computing, and value is 0; The operation of bus B is blocked, and bus B is preengage successfully;

10) when the control command information on services that service tracks module tracks be cancellation operation, negative acknowledge, the command operation time of operation response, the order of arriving stop service time, the reservation logical variable value parsed is 1; According to the improvement lockout algorithm containing reservation logical variable, the lock modules of bus B is done and computing, is worth the value for former logical expression; The reservation of bus B is removed.