CN201570908U - Monitoring and protecting device of DS (data-sharing) centralized-digitized transformer station - Google Patents

Abstract

The utility model relates to a microcomputer protecting device of a centralized-digitized transformer station, which adopts a double-power-supply source technology. The device includes a chassis, a CPU plug-in component, an optical-fiber Ethernet plug-in component and a power supply, wherein the chassis includes a man-machine interface unit and an intelligent rear panel which are connected, and the CPU plug-in component, the Ethernet plug-in component and the power supply are plugged and connected on the intelligent rear panel of the chassis. Owning to the novel design idea, the device adopts an optical fiber Ethernet insert piece to isolate interference outside the device; the multiple-CPU modularized design is adopted, so that the protection function can be configured as required, and the problems of one integrated circuit board can not cause the failure of the system; the man-machine interface adopts a touch screen and can be equipped with a mouse, a keyboard and a display, so that the use is flexible and the operation is convenient. Conforming to the IEC61580 standards, the device can have interoperation with equipment of other factories, no protocol conversion is required, and the reliability and the practicality of communication are improved.

Description

A data sharing centralized digital substation monitoring and protection device

Technical field:

The utility model relates to an electric power system automation device, in particular to a network-based data sharing centralized digital substation monitoring and protection device.

Background technique:

Power system automation technology has reached a certain level after decades of development, which has greatly improved the level of safe operation of the power grid, and enhanced the reliability of power transmission and distribution and power grid dispatching. In particular, digital substation technology has successfully solved the problems of poor interoperability in traditional substations. Electromagnetic transformers have iron core saturation, poor transient characteristics and bulky volume, lack of sufficient primary equipment status information, and cannot achieve condition-based maintenance, etc. Problems, although the digital substation solves many problems existing in the traditional power system. With the advantage of fast transmission rate of computer high-speed network in real-time system, digital substation realizes data sharing of primary equipment through Ethernet network, but it is difficult to completely overcome electromagnetic interference in substation only by 1:1 coupling transformer in Ethernet card, The accuracy of data transmission is reduced; and the existing digital substation floating-point calculation consumes a lot of CPU resources and consumes a lot of power.

Utility model content:

The purpose of the utility model is to provide a network-based data sharing centralized digital substation monitoring and protection device with anti-interference, high communication reliability, stable operation, fast data transmission rate and low CPU power consumption.

In order to achieve the above object, the utility model provides a data sharing centralized digital substation monitoring and protection device, the improvement of which is that the device includes: a chassis, a CPU plug-in, an optical fiber Ethernet plug-in and a power supply, and the chassis includes a man-machine interface unit and an intelligent backplane, the man-machine interface unit is connected to the intelligent backplane, the CPU plug-in, optical fiber Ethernet plug-in and power supply are plugged on the intelligent backplane of the chassis, and the CPU plug-in includes: CPU unit, Memory and embedded board, the CPU unit and memory are installed on the embedded board, the embedded board is plugged into the smart backboard, and the embedded board is provided with an RS-485 interface and an Ethernet interface, the CPU unit communicates with the man-machine interface unit through the RS-485 interface, and the CPU unit communicates with the network switch by connecting the optical fiber Ethernet plug-in through the Ethernet interface.

A preferred technical solution of the utility model is: the improvement of the data-sharing centralized digital substation monitoring and protection device lies in that a maximum of 12 CPU plug-ins are plugged into the smart backboard.

Another preferred technical solution of the utility model is: the improvement of the data sharing centralized digital substation monitoring and protection device lies in that there are at least two optical fiber Ethernet plug-ins.

The utility model has beneficial effects: the optical fiber Ethernet plug-in is used to completely isolate the interference from the outside of the device, overcome the electromagnetic interference in the substation, and greatly improve the reliability of device communication; the CPU plug-in adopts multi-CPU parallel working technology, and various protection functions are distributed Among different CPUs, if a CPU system has a short-circuit abnormality, it will automatically cut off the connection with the external power supply, so as to avoid affecting the entire protection device; the number and function of the CPU can be freely configured according to the needs, so as to meet the user's requirements for substation functions. Requirements for free configuration; the use of low-power high-speed CPU processor chips also solves the problem of consuming a large amount of CPU resources for floating-point operations; a 15-inch large LCD screen is used as the display interface, which can display the operating status of the entire substation in the It is displayed in one interface, and uses a touch-screen keyboard, which can be flexibly input without reading the manual; adopts a rear plug-in plug-in design to ensure flexible configuration of the system; the board can be plugged in and out, and realizes self-identification and error alarm of the plug-in .

Description of drawings:

The structural relationship connection diagram of the microcomputer protection device of Fig. 1 dual power supply of the present utility model;

Fig. 2 rear view of the microcomputer protection device of the utility model dual power supply;

Fig. 3 is the front view of the microcomputer protection device of the utility model with dual power supply.

Detailed ways:

As shown in Figure 1, a microcomputer protection device with dual power supply provided by the utility model includes: a chassis, a CPU plug-in 2, an optical fiber Ethernet plug-in 3 and a power supply 4, and the chassis includes a man-machine interface unit and an intelligent backplane 12 , the man-machine interface unit is connected to the smart backplane 12 . The CPU plug-in 2, the optical fiber Ethernet plug-in 3 and the power supply 4 are plugged on the intelligent backplane 12 of the chassis. The optical fiber Ethernet plug-in completely isolates the interference from the outside of the device and overcomes the electromagnetic interference in the substation.

The power supply 4 uses two independent hot-swappable power supplies to provide power in a redundant manner. Each switching power supply can input AC 220V or DC 220V, and the power of each switching power supply can maintain stable operation of the protection. There is an automatic switching and protection circuit on the intelligent backplane 12, which simultaneously monitors the working conditions of the two hot-swappable power supplies, and evenly distributes the load rate of the two hot-swappable power supplies, with each hot-swappable power supply carrying a 50% load , when a hot-swap power supply is powered off, the load rate of the normal hot-swap power supply is rapidly increased to 100% load, which meets the working requirements of the protection.

CPU plug-in 2 comprises: CPU unit 21, memory and embedded board 23, CPU unit 21 and memory are installed on the embedded board 23, are provided with RS-485 interface 24 and Ethernet interface 25 on the embedded board 23 cards, The CPU unit 21 communicates with the man-machine interface unit through the RS-485 interface 24 , communicates with the switch through the Ethernet interface 25 connecting the Ethernet plug-in 3 , and the embedded board 23 is plugged into the intelligent backplane 12 . The functional modules of the CPU plug-in are based on microcomputer technology to realize protection, measurement, control, communication and other functions; exchange information with station-level and process-level equipment through station-level bus and process bus; include 66kV system control module, 10kV system control module, etc., and The virtual server can be connected to other intelligent modules in the station, such as DC system, watt-hour meter, etc.

As shown in FIG. 2 , the device adopts the multi-CPU parallel working technology, and a maximum of 12 CPU plug-ins 2 are plugged into the smart backplane 12 . Each CPU card 2 implements a protection function realized by an original conceptual device or unit. The number and functions of the CPU plug-in 2 can be freely configured according to requirements, so as to meet the user's requirements for free configuration of substation functions. Each CPU plug-in 2 can exchange information with station-level and process-level devices through optical fiber and process bus to realize corresponding protection functions.

As shown in Figure 1, the human-machine interface unit includes a human-machine interface processor 13, a carrier board 14, a liquid crystal screen 15, a driving circuit 16, an input device and a communication interface 18, and the human-machine interface processor 13, a driving circuit 16 and a communication interface 18 Installed on the carrier board 14 , the liquid crystal screen 15 and the input device are connected with the carrier board 14 . As shown in Fig. 3, the liquid crystal screen 15 adopts a 15-inch industrial liquid crystal screen and uses a 5-wire touch screen as an input medium, which can display the operation status of the entire substation in one interface. The input device adopts a touch screen 19, and the input method is flexible, and it can be flexibly input without reading the instruction manual. The communication interface 18 includes an RS-485 interface and an Ethernet interface.

The software structure of this device completely complies with the logical node design of the IEC61850 standard, adopts object-oriented dynamic modeling technology, has built-in related logical nodes, supports free distribution of functions, and meets all communication requirements of the IEC61850 standard. In the overall design of software and hardware, the requirements of reliability and openness have been fully considered, and a unified engineering system integration tool conforming to the IEC61850 standard is equipped to analyze and generate SCL configuration files and support offline and online configuration. The device can statically establish a communication model according to the configuration information provided by the IED configuration file generated by the tool. Fully support SCSM protocol stack: TCP/IP, UDP, IEEE802.3, etc.; adopt self-developed MMS protocol stack. The rear plug-in design is adopted to ensure the flexible configuration of the system. Each board can be hot plugged, and can realize plug-in self-identification and error alarm.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. Although the utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the utility model can still be implemented. Modifications or equivalent replacements of the specific embodiments without departing from the spirit and scope of the present invention shall fall within the protection scope of the claims of the present invention.

Claims (3)

1. A data sharing centralized digital substation monitoring and protection device is characterized in that: the device includes: a chassis (1), a CPU plug-in (2), an optical fiber Ethernet plug-in (3) and a power supply (4), and the chassis (1) comprise man-machine interface unit (11) and intelligent backboard (12), described man-machine interface unit is connected with intelligent backplane (12), described CPU plug-in (2), optical fiber Ethernet plug-in (3) and The power supply (4) is plugged on the intelligent backplane (12) of the chassis (1), and the CPU plug-in (2) includes: a CPU unit (21), a memory (22) and an embedded board (23), The CPU unit (21) and memory (22) are installed on the embedded board (23), and the embedded board (23) is plugged on the intelligent backplane (12), and the embedded board Card (23) is provided with RS-485 interface (24) and Ethernet interface (25), and described CPU unit (21) communicates with man-machine interface unit (11) by RS-485 interface (24), and described The CPU unit (21) communicates with the network switch by connecting the optical fiber Ethernet plug-in (3) via the Ethernet interface (25). 2. A data-sharing centralized digital substation monitoring and protection device according to claim 1, characterized in that: a maximum of 12 CPU plug-ins (2) are plugged into the intelligent backplane (12). 3. A data-sharing centralized digital substation monitoring and protection device according to claim 1, characterized in that there are at least two optical fiber Ethernet plug-ins (3).

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