CN101661842B - Integrated mis-logical locking prevention system of digital substation - Google Patents

Abstract

The invention relates to an integrated mis-logical locking prevention system of a digital substation, which is characterized in that: the system comprises two stages of independent mis-logical locking prevention of a station monitor and control layer and mis-logical locking prevention of a bay layer, wherein the mis-logical locking prevention of the bay layer is established based on communicationbetween a bay layer and a process layer of a GOOSE mechanism; intelligent equipment of the bay layer acquires required state information participating in logic locking calculation by utilizing the GOOSE mechanism through a network of the process layer; and the system consists of an operator station of the station monitor and control layer, the intelligent equipment of the bay layer, and an intelligent interface of the process layer. The system makes up for the deficiency of the conventional anti-misoperation locking system, simplifies construction, improves reliability, and has clear hierarchies; and the GOOSE mechanism ensures quick and reliable information transmission.

Description

An integrated anti-mistake logic locking system for digital substation

technical field

The invention belongs to the technical field of electric power system automation, and in particular relates to an integrated anti-mistake logic locking system of a digital substation.

Background technique

How to prevent accidents (especially major accidents) caused by erroneous switching operations in the power system has always been a major problem in this industry. The microcomputer anti-misoperation locking system takes the heavy responsibility in the safe operation of the power system with its unique logical judgment ability. The existing microcomputer anti-misoperation locking system is a computer monitoring system based on the computer and its peripheral equipment and the intelligent expert system as the core to prevent human error. It consists of the following parts: microcomputer, analog operation and display Screens, on-site information collection and communication system devices, computer keys, electronic locking devices, intelligent expert system software, etc., as well as auxiliary equipment such as power supplies, printers, keyboards, and mice. Not only need to invest a lot of money to configure the microcomputer anti-misoperation locking system, but also there are many problems in these systems. For example: there is no signal connection (or incomplete connection) between the simulation graphics used in the existing microcomputer error prevention system and the actual device on site, and whether the equipment status in the simulation graphics is correct or not is directly related to the correctness of the simulation operation. If the equipment does not match the on-site equipment but the simulated operation can pass the detection of the five-defense expert system, a major error may occur. In addition, in the traditional microcomputer anti-misoperation locking system, it is required that after the operation content is sent to the computer key and operated, the operation process must be sent back to the anti-misoperation locking system manually (or through Bluetooth communication, etc.). If the transmission is not carried out, the status of the equipment in the simulation graphics will not change, which will make the status of each equipment in the system inconsistent with the actual situation, leaving an unsafe factor for the next operation.

With the continuous increase of the capacity of the substation, the continuous improvement of the voltage level, the improvement of the automation level of the substation, the increase of the number of unattended stations, and the daily operation and processing of the centralized control station or dispatching center are also increasing, and the amount of anti-mislocking information that needs to be involved increases. , The information verification between the conventional dedicated five-defense system and the integrated self-system is complicated, which increases the possibility of errors. Once the five-defense system crashes, it will seriously affect the safe and reliable operation of the power system.

Contents of the invention

In order to solve the deficiencies of the prior art, the object of the present invention is to provide an integrated anti-mistake logic locking system for digital substations. The system includes two independent anti-mistake logic locks: the station control layer anti-mistake logic lock and the bay layer anti-mistake logic lock. The anti-mistake logic blocking function of the station control layer is integrated in the monitoring system. The location information of each interval device in the whole station is obtained from the interval layer equipment through the optical fiber self-healing ring network, and the logical calculation is performed according to the preset logical relationship. When the controlled object When the condition is met, the corresponding operation is opened, otherwise the corresponding operation is blocked; the bay layer anti-mistake logic blocking function is based on the bay layer smart device, based on the process layer network, and obtains the location information of the primary device from the process layer through the GOOSE mechanism.

In order to achieve the above object of the invention, the present invention is realized through the following technical solutions:

An integrated anti-mistake logic locking system of a digital substation is characterized in that: two independent levels of anti-mistake logic locking of the station control layer and anti-misoperation logic locking of the interval layer. a) The station control layer operator station is composed of computer hardware, operating system, application software system (including communication software, database software system and man-machine interface system); the operator selects an object to control and operate through the man-machine interface, and integrates it into the monitoring system. The system's station control layer anti-mistake logic blocking function software module will decide whether to block or open the control operation according to the calculation results; b) The intelligent equipment at the bay layer is composed of embedded devices and has two types of network interfaces. The network port is an optical Ethernet port for the process layer; after receiving the remote control command sent from the station control layer to the smart device in this bay from the network, it is determined to be open for execution according to the calculation result of the anti-error logic blocking function of the smart device in the bay layer Or block execution, the state of a device required for logic calculation is obtained from the process layer intelligent interface through the process layer network through the GOOSE mechanism. The GOOSE mechanism ensures the real-time and reliability of the information; c) The process layer intelligent interface is relative to The I/O device installed near the primary device sends the collected primary device location information through the GOOSE mechanism through the process layer network to the interval layer smart device that has subscribed to the information. Among them, the error-proof logic blocking of the bay layer is based on the communication between the bay layer and the process layer based on the GOOSE mechanism. The intelligent devices of the bay layer pass through the process layer network and use the GOOSE mechanism to obtain the state information required to participate in the logic blocking calculation.

The aforementioned integrated error prevention logic locking system for digital substations is characterized by three-layer equipment and two-layer network. The three-layer equipment is respectively the station control layer, the interval layer and the process layer. The station control layer network of Ethernet and the process layer network of switched Ethernet.

The aforementioned integrated error prevention logic locking system for digital substations is characterized in that the station control layer operator station has an error prevention logic locking function for the station control layer, and this function is integrated in the monitoring system.

The aforementioned integrated error prevention logic locking system for digital substations is characterized in that the intelligent equipment at the bay layer has an error prevention logic locking function, which is independent and does not depend on the station control layer.

The aforementioned integrated error prevention logic locking system for digital substations is characterized in that information is exchanged between the intelligent equipment at the interval layer and the intelligent interface unit at the process layer through the process layer network, and the information interaction mechanism is based on the GOOSE mechanism. Directly obtain the current interval information required for self-locking and the inter-interval status information required for interlocking.

The above-mentioned integrated anti-mistake logic locking system of digital substation is characterized in that the station control layer network of optical fiber self-healing ring Ethernet has real-time monitoring function and self-healing function of communication network.

The above-mentioned integrated anti-mistake logic locking system of digital substation is characterized in that the process layer network of switched Ethernet supports optical fiber communication interface.

The invention has the advantages of reasonable system structure, clear layers, simple and convenient construction, and independent locking functions of two-stage error prevention logic, which ensures the reliability of control.

The integrated anti-error logic locking system of the digital substation includes the operator station at the station control layer, the intelligent equipment at the bay layer, and the intelligent interface at the process layer. Due to the particularity of the use environment, the system also has the following characteristics:

1. Reliability, the station control layer and the compartment layer have two levels of anti-mistake logic blocking functions, and the two independent functions ensure that even if the anti-mistake function of one level fails, the function of the other level will work, ensuring the safety of the operation.

2. Communication between the bay layer and the process layer. The trip command of the bay layer smart device is transmitted to the process layer smart device through the GOOSE mechanism, and the process layer smart device transmits the location information of the primary device to the bay layer smart device through the GOOSE mechanism. GOOSE The mechanism ensures real-time and reliability.

Description of drawings

Figure 1 System structure diagram.

Detailed ways

Fig. 1 is a system structure diagram of the present invention, and the present invention will be further described in detail below in conjunction with the accompanying drawings.

An integrated anti-mistake logic locking system for a digital substation, please refer to Figure 1, which includes an operator station at the station control level, intelligent equipment at the bay level, and an intelligent interface at the process level. The station control layer operator station is composed of computer hardware, operating system, application software system (including communication software, database software system and man-machine interface system); the operator selects an object with the mouse through the man-machine interface to control and operate, and is integrated in the monitoring system. The system's station control layer anti-mistake logic locking function software module will decide whether to block or open the control operation according to the calculation result; The calculation result of the anti-mistake logic locking function determines whether it is open execution or closed execution. The state of the primary equipment required for logic calculation is obtained from the process layer intelligent interface through the process layer network through the GOOSE mechanism; the process layer intelligent interface uses the GOOSE mechanism. The collected location information of the primary device is sent to the bay layer smart devices that have subscribed to the location information of the interval.

The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention is modified or equivalently replaced without departing from the present invention Any modification or partial replacement within the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

Claims (7)

1. An integrated anti-mistake logic locking system of a digital substation, characterized in that: two independent station control layer anti-mistake logic locking and interval layer anti-mistake logic locking, wherein the anti-mistake logic locking of interval layer is built on On the basis of the communication between the bay layer and the process layer based on the GOOSE mechanism, the bay layer intelligent equipment uses the process layer network to obtain the required status information for participating in the logical locking calculation through the process layer network, and the logic blocking functions of the station control layer and the bay layer are independent. , the anti-mistake function of one level fails, and the function of the other level works; there are two independent anti-mistake logic locks of the station control layer and the anti-mistake logic lock of the interval layer; a) the operator station of the station control layer is composed of computer hardware, operating system , Application software system composition; the operator selects an object through the man-machine interface to perform control operations, and the software module of the station control layer anti-mistake logic blocking function integrated in the monitoring system will decide whether to block or open the control operation according to the calculation results; b) Interval Layer intelligent equipment is composed of embedded equipment and has two types of network interfaces, the electrical Ethernet port for the station control layer, and the optical Ethernet port for the process layer; received from the network from the station control layer to the intelligent equipment in this interval After the remote control command, according to the calculation result of the anti-mistake logic locking function of the intelligent equipment at the bay layer, it is determined whether to open the execution or to lock the execution. The state of the primary equipment required for the logic calculation is obtained from the process layer intelligent interface through the process layer network and the GOOSE mechanism. , the GOOSE mechanism ensures the real-time and reliability of the information; c) The intelligent interface of the process layer is an I/O device installed nearby relative to the primary device, and the collected primary device location information is sent to the subscriber through the process layer network through the GOOSE mechanism The information compartmentalizes the smart device. 2. The system according to claim 1, characterized in that: three-layer equipment and two-layer network, three-layer equipment are respectively station control layer, interval layer and process layer, and two-layer network is respectively the optical fiber self-healing ring Ethernet Station control layer network and process layer network of switched Ethernet. 3. The system according to claim 1, characterized in that: the operator station of the station control layer is equipped with a logic blocking function for preventing errors of the station control layer, and this function is integrated in the monitoring system. 4. The system according to claim 1, characterized in that: the intelligent equipment at the bay layer has an anti-error logic blocking function, which is independent and does not depend on the station control layer. 5. The system according to claim 1, characterized in that: between the interval layer intelligent equipment and the process layer intelligent interface unit, information is exchanged through the process layer network, and the information interaction mechanism is based on the GOOSE mechanism, which is directly obtained from the process layer intelligent interface. The current interval information required by the lock and the cross-interval status information required by the interlock. 6. The system according to claim 1, characterized in that: the station control layer network of optical fiber self-healing ring Ethernet has a communication network real-time monitoring function and self-healing function. 7. The system according to claim 1, characterized in that: the process layer network of switched Ethernet supports optical fiber communication interface.

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