Predictive Control Method of Wireless Transmitting Power Constrained by Reliability Requirements of Smart Substation
A smart substation, wireless transmission technology, applied in power management, wireless communication, electrical components and other directions, can solve the problems of increasing electromagnetic wave signal communication channel interference, increasing the energy consumption of transmitting node equipment, affecting the communication quality of nearby nodes, etc. life, precise control of equipment transmit power, and the effect of reducing transmit power
Active Publication Date: 2022-03-15
HEFEI UNIV OF TECH
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Problems solved by technology
In order to ensure the reliability of communication, the communication signal strength can be increased by increasing the node transmission power, thereby improving the reliability of communication. However, in the wireless communication process, when the node adopts a higher transmission power, it will increase the electromagnetic wave signal’s influence on the communication channel of other nodes. Interference, affecting the communication quality of nearby nodes, and increasing the energy consumption of the transmitting node equipment, and the small transmitting power may not meet the reliability requirements of data communication
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[0052] In an embodiment, a wireless transmission power predictive control method constrained by reliability requirements of a smart substation uses a laboratory indoor environment to simulate the indoor environment of a smart substation, and the wireless communication sending node performs patrol inspection on a planned path in the laboratory, and Send data, while the wireless communication receiving node is fixed at a specific indoor location; the wireless transmission power predictive control method constrained by the reliability requirements is carried out in the following steps:
[0053] Step 1. According to the substation wireless communication data reliability index requirement P s , calculate the corresponding communication bit error rate P e , and then calculate the corresponding communication expected signal-to-noise ratio S;
[0054] Step 1.1. Select the wireless communication data reliability index requirement P in the substation s =0.9999, the length of a communi...
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The invention discloses a wireless transmission power prediction control method constrained by reliability requirements of an intelligent substation. The steps include: firstly, by analyzing the relationship between reliability, signal-to-noise ratio and transmission power, using the loss model of wireless signal propagation and Kalman filter The state space equation of wireless signal propagation with state observation is constructed; secondly, the expected signal-to-noise ratio is compensated by estimating the confidence interval of the signal-to-noise ratio fluctuation in real time; finally, the definition is based on the transmission power and the actual signal-to-noise ratio The difference is the quadratic cost function of the target, and the optimal control of the transmit power is realized through the dynamic programming algorithm. The invention can solve the problem of coordination between the transmission power of the wireless sensor network and the reliability of wireless communication in the substation environment, thereby reducing the transmission power of nodes as much as possible while ensuring the reliability of wireless communication.
Description
technical field [0001] The invention belongs to the field of wireless communication network data communication, and in particular relates to a wireless transmission power prediction control method constrained by reliability requirements of an intelligent substation to ensure the reliability of wireless data communication and at the same time realize the coordination of reliability and energy consumption. Background technique [0002] With the development of science and technology and the advancement of the power Internet of Things, more and more substations adopt intelligent operation and management modes. The development of wireless communication has made the interaction between measurement terminals and background information a reality. Among them, ZigBee wireless communication technology has been widely used in smart grid communication due to its low power consumption, low cost, reliability, security and confidentiality. The wireless distributed monitoring of ambient temp...
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IPC IPC(8): H04W52/24H04W52/22H04W4/38H04W84/18
CPCH04W52/241H04W52/245H04W52/242H04W52/223H04W4/38H04W84/18
Inventor 孙伟韦康张磊李奇越李帷韬
Owner HEFEI UNIV OF TECH