Design and Operation of Remote Viewing System in Substation

Abstract: The design and operation information of the remote viewing system of the substation is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Introduction The remote image monitoring system of the substation of Heshan Electric Power Bureau (referred to as this system) began to be installed and put into trial operation in July 2001. It started with 3 stations and expanded to 10 stations in October 2001. A remote image monitoring network for substations has been formed. . This system is a set. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the design and operation of the substation remote viewing system. Introduction The remote image monitoring system of the substation of Heshan Electric Power Bureau (referred to as this system) began to be installed and put into trial operation in July 2001. It started with 3 stations and expanded to 10 stations in October 2001. A remote image monitoring network for substations has been formed. . This system is a new monitoring system based on TCP/IP network, which transmits image, sound and control data with standard IP packets. Its core technology is IP multicast technology. Therefore, network design, installation and operation and maintenance are all related to previous image. There are major differences in monitoring systems. 1 System design This system is divided into three parts: image acquisition and on-site monitoring, network transmission, monitoring center monitoring and maintenance according to the location of the equipment and control software. Among them, the design of the image acquisition part is the same as that of the traditional monitoring system. The key point of this system is the design of the IP network. 1.1 Camera, pan/tilt and lens According to the actual situation of Heshan Electric Power Bureau substation, do the following configuration: a. Each station is equipped with 1 to 4 8X16x Pelco integrated high-speed balls and 1 to 2 16x color cameras with PTZ, equipped with 3 variable lenses. b. The integrated high-speed dome is installed on the roof and is mainly used to monitor the main transformer and perform large-scale scanning. Cameras are installed in the main control room, high and low voltage room, communication room, etc. c. Configure a fixed camera gun and a wide-angle lens in places where the viewing angle range is relatively wide. d. Configure infrared probes at the gate and surrounding walls of the substation. 1.2 On-site control matrix The basic configuration of the monitoring matrix is ​​32 channels of input and 8 channels of output, but it has good expansibility and can be expanded to 64 channels, which fully meets the needs of the substation. Therefore, if additional cameras are required in the future, they can easily be added to the system. The monitoring matrix also has an alarm interface. In the initial stage, the alarm output of the infrared probe is connected to the monitoring matrix, and the monitoring matrix transmits it to the monitoring center. After the monitoring center processes the alarm, it can respond to the alarm event by voice. 1.3 Video front-end The video front-end adopts the standard -48V communication power supply, so the backup power supply of the communication room can be used. In the case of abnormal 220V power supply, the normal operation of the video front-end can be ensured. The front-end computer uses hardware compression to compress and package the video signal and transmit it. At the same time, it accepts the command of the monitoring center to control the image switching of the matrix, collect alarm information, and use the matrix to control the intelligent high-speed ball, pan/tilt, lens, etc. Control lights, etc. 1. 410Base-T/G.703 converter This system takes the monitoring center as the connection center to form a star network topology structure, the basic network channel is standard Ethernet, and the transmission channel is E1. At the station end, the converter of l0Base-T/G.703 of Belgian indus company is used to automatically convert the Ethernet data packet to be transmitted on E1; and at the central office, it is converted back and becomes a standard Ethernet data packet. This kind of converter of indus company works in the second layer, as a transparent bridge, therefore, the station end and the monitoring center are all in the same local area network. The converter also supports routing. However, for the simple and reliable network and easy maintenance, it still works in transparent bridge mode. 1.5 Monitoring Center The computer in the monitoring center is used to communicate with the on-site host and process video signals. When designing, use the l0Base-T/G.703 converter in the central control room to directly send the signal from the optical transceiver to the network of the monitoring center. Taking into account the independence and stability of the ESC system, the local area network of the monitoring center should be an independent network and be connected to the MIS network of Heshan Electric Power Bureau through an optical fiber channel. In order to continue to ensure the independence and stability of the monitoring network and prevent the video stream from affecting the MIS network, the monitoring network must be placed in an independent VLAN. Due to processing a large number of video streams and requiring support for IP multicast, the switch in the monitoring center chose CiscoCatalyst3524. The central switch of Heshan Electric Power Bureau is Cisco Catalyst 6509, which has high performance and supports IP multicast. The performance requirements for switches and routers are calculated below. According to the VCD standard, the video stream is 1150kbit/s, that is, 144kB/s, and a video UDP is about 1.0kB to 1.5kB. Therefore, each video needs a maximum of 150 UDP packets per second. In this way, the packet forwarding capability of the 10-channel video to the switch is 1500 packets per second. In this system, CiscoCatalyst3524 has 10Gbit/s switching backplane, 6.5X106 packet forwarding capability per second,More than enough for 10-channel video processing. 2 Switch configuration One of the keys to this system is the configuration of network switches.

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