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The premise and foundation of autonomous landing relative navigation based on vision for unmanned aerial vehicle (UAV) are accurate detection of landing cooperative target. In order to overcome the problem of cooperative target detection susceptible to illumination change and the interference, a new landing cooperative target detection algorithm based on low rank matrix recovery theory is proposed...
In order to overcome the problem of poor filtering by using traditional PI control for dc-link voltage of shunt active power filter (SAPF), an adaptive fuzzy control method is proposed. Firstly, a fuzzy controller is designed which contains two inputs and one output. The two inputs are error and error rate is between reference dc-link voltage and the actual voltage of capacitor, and current amplitude...
With the deepening of the concept of sustainable development, wind power as a renewable energy has been rapid developed. The simulation of wind power generation system in wind power system analysis, power analysis and power grid energy analysis in both played a very important role. In this paper, by using the MATLAB software, the power electronic system mathematical model related to the wind speed,...
As the main protection of high voltage direct current (HVDC), the traveling wave protection is not easily affected by the resistance and capacitance of the transmission line, but there are still some shortcomings. This article not only briefly analyses some the traveling wave protection method based on wavelet transform and mathematical morphology, but also sums some non-traveling wave protection...
It is necessary to select appropriate methods of calculation and lightning protection for transmission line has characteristics such as wide distribution, long span and high lightning trip-out rate. This paper initially introduces and compares several calculation methods, then analyzes principles of some common lightning protection measures of transmission line in detail. Large quantity fact proved...
Growing peak electricity demand and outstanding of environment problem, distributed generator (DG) is rising progressively used as a supplement of concentrated generator. The influence of DG to traditional distribution network can not be ignored with quantity increasing of DG. This paper systematically introduce this influence through three aspects: distribution network planning, relay protection...
One of the most important issues is indoor air quality in our environment-related. Formaldehyde, ammonia and other toxic substances in interior decoration materials and new furniture is known as a major source of indoor air pollution, indoor air gas into its volatile state. However, it is still using the current measurement tools to accurately estimate a challenge overall air quality. Therefore, the...
Our county distribution power network neutral point grounding modes are divided into three categories: Neutral non-earthing system, neutral-point indirect earthing system and direct neutral earthing system. Neutral-point indirect earthing system is divided into neutral grounded though a resistance and neutral grounding via arc suppression coil. This article is based on the MATLAB power system simulation...
With the development of smart grid, smart substation assumes an increasingly important role. Compared with the deficiency of traditional substation, the concept of smart substation, the key technical characteristics of smart substation, relay protection and three typical configuration types are described in this paper. The key techniques in smart substation were developed that is an inevitable trend...
Due to the small fault current and unstable arc, the fault location problem of low power coal mine phase-to-ground fault has not got thoroughly solved. The existed leakage judging method of coal mine low voltage distribution network has the disadvantages of large error and long action time, so it is unfavorable for safety operation. This paper give a new methods which based on the model parameter...
In view of the coordination difficulty problems existing in relay protection system and high security demand of power supply, the global optimization model for protection settings was set up in power supply network based on the analysis of relay characteristics. A new multi-parameter co-evolutionary genetic algorithm, used to optimize the protection settings, was presented and improved with establishing...
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