Wireless transmitting power prediction control method for reliability demand constraint of intelligent substation

Abstract

The invention discloses a wireless transmitting power prediction control method for reliability demand constraint of an intelligent substation, and the method comprises the steps: constructing a wireless signal propagation state space equation with state observation through the analysis of the relation among reliability, a signal-to-noise ratio and transmitting power and the utilization of a lossmodel and a Kalman filter of wireless signal propagation; performing expected signal-to-noise ratio compensation by estimating a confidence interval of signal-to-noise ratio fluctuation in real time;finally, defining a quadratic cost function taking the difference between the transmitting power and the actual signal-to-noise ratio and the expected signal-to-noise ratio as a target, and realizingoptimal control of the transmitting power through a dynamic programming algorithm. According to the invention, the problem of coordination between the transmitting power of the wireless sensor networkand the wireless communication reliability in the transformer substation environment can be solved, so that the transmitting power of the node is reduced as much as possible while the wireless communication reliability is ensured.

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...

AI Technical Summary

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

Images