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User datagram protocol (UDP)-based wind generating set communication method and system

The technology of a wind power generating set and a communication method, which is applied in the field of network communication, can solve the problems of slow communication speed of the TCP/IP protocol and occupy a large amount of system resources, and achieve efficient and reliable communication solutions, occupy less resources, and overcome the problems of low communication accuracy Effect

Inactive Publication Date: 2013-09-04
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Application Information

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Problems solved by technology

[0006] Aiming at the shortcomings of the TCP / IP protocol used in the existing wind power generating set communication system, which has a slow communication speed and takes up a lot of system resources, the present invention provides a UDP protocol-based wind power generating set communication method and system, and the UDP protocol is selected to complete the Ethernet task. , established a fast on-site communication system with superior communication performance

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  • User datagram protocol (UDP)-based wind generating set communication method and system
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  • User datagram protocol (UDP)-based wind generating set communication method and system

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[0038] The UDP packet structure is as follows image 3 As shown, each UDP message is divided into two parts: the UDP header and the UDP data area. The UDP protocol stipulates that the UDP header consists of 4 fields, and the length is fixed at 8 bytes. Each field occupies two bytes, respectively The source port number, destination port number, UDP length and checksum, and UDP data area are defined by the developer.

[0039] The upper computer sends a UDP request message to the PLC, the source port number is 1026 (the port number can be determined according to the actual situation, usually use a port number above 1000 to avoid conflicts with other applications), and the destination port number is 32768; Send a UDP response message, the source port number and destination port number are both 32768; UDP length refers to the length of each UDP message, and UDP checksum provides error detection; due to the large amount of data that the PLC needs to send to the host computer, We di...

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Abstract

The invention discloses a user datagram protocol (UDP)-based wind generating set communication method. The operating systems adopted by a programmable logic controller (PLC) and an upper computer can provide good support for Ethernet. The method comprises the following steps of: when an application program is started by the upper computer, calling a UDP transmitting process, encapsulating relevant data into a UDP message and further assembling the UDP message into an internet protocol (IP) message; when the PLC receives the IP message transmitted by the upper computer, taking the IP header out of the message by the PLC, judging whether an IP address is correct, and if the IP address is correct, judging the checksum of a port number and the UDP header; if the conditions are met, confirming the validity of the message, extracting the valid information from the message and analyzing the valid information according to a protocol; and transmitting a UDP response message to the upper computer by using the PLC, and judging and analyzing the message by the upper computer after receiving the UDP response message.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a UDP-based communication method and system for a wind power generating set. The UDP protocol is selected to complete the Ethernet transmission task, and an on-site fast communication system for the wind power generating set is established. Background technique [0002] The TCP / IP protocol is the actual industry standard in the current network protocol. Adopting the TCP / IP protocol will bring many benefits. The network equipment can be connected to the Internet to realize the real remote monitoring of the wind turbine. TCP / IP is a four-layer protocol system, which can be divided into link layer, network layer, transport layer and application layer. [0003] The link layer completes tasks such as the driver of the Ethernet device and the processing of the physical interface. The network layer is composed of various protocols, among which the IP protocol is the most ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/70
Inventor 丁桂林叶伟郭锐颜毅斌符伟杰
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST