JPH10268929A - Supervisory and control system for plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supervisory and control system with which the occurrence of accident can be surely discriminated and dealt with. SOLUTION: Concerning inputted state change packet data, a state change analytic part 4 distinguishes a state change packet and the other packet and analyzes the class of state change packet. Concerning the analyzed state change packet data, a state change data analytic part 5 analyzes the occurrence of accident separately for the class of equipment and the class of operating direction. When the occurrence of accident is analyzed, an accident processing part 6 performs accident processing and concerning the other analyzed result, an ordinary processing part 7 performs processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring and control system for various industrial treatment plants such as a power plant, a sewage treatment plant, and a chemical / food plant. It relates to a device for detecting.

[0002]

2. Description of the Related Art When an accident or abnormality occurs in equipment of a power plant to be monitored and controlled, a protection device (relay) operates to trip (disconnect) a circuit breaker, and disconnect the accident equipment from a main circuit. Eliminate the accident.

In parallel with the elimination of the accident, the state change of the protection device, circuit breaker and equipment is transmitted and received as time-series data between the slave station and the master station of the telecontrol device provided in the monitoring and control system as packets. The system itself detects accidents and abnormalities, displays the status of accidents, and takes other measures such as system reorganization.

The types of packets transmitted and received in the event of an accident or abnormality include, for example, the following in a power plant monitoring and control system.

(1) Combination state change information [0005] Transmission / reception is performed in one packet in which the trip state of the circuit breaker and the state of the relay that operates the circuit breaker are combined. This is a state change packet mainly for transmitting and receiving equipment operation at the time of an accident or abnormality.

(2) Individual state change information A state change of a circuit breaker or a relay is transmitted and received as device information. This is a state change packet for transmitting and receiving control response and independent operation at the time of an accident or abnormality.

[0007] When receiving the state change information, the accident occurrence detection device analyzes the contents thereof and determines whether or not an accident has occurred.

[0008]

Conventionally, as an attribute of state change information in various industrial processing plants, whether or not the state change information causes an accident is defined in equipment data (generally called a position table). I have. Using this, the attribute of the state change information received by the state change analysis unit is analyzed, and it is determined that an accident has occurred when the information is the cause of the accident.

That is, as shown in FIG. 4, when the status change information is received, it is determined whether or not the status change information is the cause of the accident. Sometimes we deal with accidents.

In this method, it is determined whether or not all the state change information is the cause of the accident. Therefore, not only the information of the cause of the accident but also the state change information at the time of returning from the accident is determined by the cause of the accident. The determination as to whether or not there is an error may cause an erroneous determination that an accident has occurred, and this is a factor that lowers processing efficiency.

It is an object of the present invention to provide a monitoring and control system which ensures the determination of an accident occurrence and the response.

[0012]

According to the present invention, a state change packet is analyzed by analyzing a received state change packet, dividing the processing for each packet type (single or combination), and analyzing the state change data of the packet. Processing is divided for each device type (such as a circuit breaker or relay), and the operation direction of the state change data (switching on / off of the circuit breaker, operation / returning of the relay, etc.) is also used to determine an accident. And the following configuration is characterized.

In a monitoring and control system for detecting and processing the occurrence of an accident from state change packet data of various equipment of an industrial processing plant, discrimination of state change packets from other packets and spooling of state change packets are performed for spooled packet data. A state change analysis unit for analyzing a type, a state change data analysis unit for analyzing the occurrence of an accident by classifying the state change packet data analyzed by the state change analysis unit into a device type and an operation direction type; and An accident processing unit that performs an accident process when the change data analysis unit analyzes that an accident has occurred is provided.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a system configuration on the master station side of a supervisory control system according to an embodiment of the present invention.

The accident occurrence detection device control unit 1 spools the packet information received at the input unit 2 at the state change packet input unit 3, and uses the state change analysis unit 4 to change the state change packet and other packets. And the type of the state change packet (combination information and single information) are analyzed.

Further, the control unit 1 controls the state change packet data by the state change data analysis unit 5 to change the state of the device (breaker or relay) and the type of operation direction (breaker ON / OFF, relay ON / OFF). Operation / recovery)
When an accident occurrence is detected, the accident processing unit 6 processes the accident, and when no accident occurs, the normal processing unit 7 processes the accident. The display unit 8 displays various pieces of information related to the accident occurrence detection processing.

FIGS. 2 and 3 show a power plant accident detection processing procedure by the system of FIG. In FIG.
Packet spooling of status change information is performed (S
1) When the state change information is received (S2), it is checked whether the information is combination state change information as a packet type (S3). If the status change information of the device alone is found by this check, the process enters the process of FIG.

In the case of the combination state change information shown in FIG. 2, the processing is divided into loop 1 and loop 2 for each type of state change information, and the operation direction of the state change information is also used for determining an accident.

In the loop 1, the state change information of each circuit breaker of the number of received packets is repeatedly processed by the number of packets (S4, S14), and the state change information is set to “enter” or “in” as the operation direction of the circuit breaker. It is checked whether it is "off" (S5), and if the state of the "off" of the circuit breaker changes, it is determined that a trip has occurred due to an accident and the processing is performed (S6).
When the state of the circuit breaker changes to "ON", normal processing such as setting of the system state is performed (S7).

In the loop 2, the relay state change information in the packet is repeatedly processed by the number of packets (S
8, S13), it is checked whether the relay state change information is accident cause information (S9). If the relay state change information is accident cause information, it is checked whether the operation direction of the relay is the accident occurrence side (S10). When the accident factor information and the operation direction of the accident occurrence side are determined, it is determined that an accident has occurred and the processing is performed (S
11). If at least one of the two checks is not satisfied, such as the return of the relay, normal processing such as setting of the system state is performed (S12).

When the state change information is for a single device, the loop 3 accident detection processing shown in FIG. 3 is performed for the number of packets (S15, S21). In the figure, it is checked whether or not the state change information is for a switch including a circuit breaker (S16), and if it is switch information, it is determined that no accident has occurred and another normal process is performed (S17).

If the status change information is a relay, it is checked whether the information is accident factor information (S18), and if the information is accident factor information, the operation direction is checked (S1).
9) When both conditions are satisfied, it is determined that an accident has occurred and the processing is performed (S20). When both conditions are not satisfied, other normal processing is performed (S17).

Although the embodiment has been described in connection with the case where the present invention is applied to the monitoring and control system of an electric power plant, the present invention can be applied to the monitoring and control of various industrial treatment plants such as a water and sewage treatment plant and a chemical / food plant.

[0024]

As described above, according to the present invention, the received status change packet is analyzed, the processing is divided for each packet type, and the status change data of the packet is analyzed to determine the type of the device whose status has changed. Since the processing is divided for each case and the operation direction of the state change data is used for the accident determination, erroneous determination of the occurrence of the accident is prevented, and there is an effect that the response at the time of the accident is ensured while improving the processing efficiency.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 shows an accident detection processing procedure (when a combination state changes) in the embodiment.

FIG. 3 is an accident detection processing procedure in the embodiment (when a single state changes).

FIG. 4 shows a conventional accident detection processing procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... accident occurrence detection device control part 2 ... input part 3 ... state change packet input part 4 ... state change packet analysis part 5 ... state change data analysis part 6 ... accident processing part 7 ... normal processing part 8 ... display part

Claims (1)

[Claims] 1. A monitoring and control system for detecting and processing the occurrence of an accident from state change packet data of various equipment of an industrial processing plant, wherein discrimination between state change packets and other packets and state change of spooled packet data are provided. A state change analysis unit that analyzes the type of packet, and a state change data analysis unit that analyzes the occurrence of an accident by classifying the state change packet data analyzed by the state change analysis unit into a type of device and a type of operation direction, A plant monitoring and control system, comprising: an accident processing unit that performs an accident process when the state change data analysis unit analyzes that an accident has occurred.