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The phase selection control device is usually used to control the opening and closing for phase selection of switchgear in substations above 500kV. The opening time and closing time of the switchgear are discrete since they are affected by factors such as temperature, residual magnetism and electromagnetic shock. The phase selection control device shall give due consideration to specific structural properties of the loop in which the switchgear is located and the internal actuating mechanism of the device, so as to tackle the time discreteness during opening or closing of the switchgear. The document studies a new type functional testing system for phase selection control device, which belongs to the electric power system automation equipment testing techniques, including the system power supply and the device under test connecting to the HV contactor, the general-purpose computer, simulated three-phase power supply connecting to the system power supply and the simulated three-phase load connecting to the resistive load bank. The mentioned simulated three-phase power supply includes the primary rectifier unit and the inverter unit connecting with the rectifying boost unit via DC busbar; the mentioned simulated three-phase load includes IGBT power unit and the IGBT control unit connecting to it. This document presents a testing system, which can effectively test the interoperation characteristics of the phase selection control device and the HV contactor, and the testing environment is closer to actual service environment. Therefore, it’s particularly suitable for the functional test of phase selection control device compatible with the HV contactors containing hydraulic actuating mechanisms. [ABSTRACT FROM AUTHOR]

Different from the traditional method which recognize the state of substation switches based on the running rules of electrical power system, this work proposes a novel convolutional neuron network-based state recognition approach of substation switches. Inspired by the theory of transfer learning, we first establish a convolutional neuron network model trained on the large-scale image set ILSVRC2012, then the restricted Boltzmann machine is employed to replace the full connected layer of the convolutional neuron network and trained on our small image dataset of 110kV substation switches to get a stronger model. Experiments conducted on our image dataset of 110kV substation switches show that, the proposed approach can be applicable to the substation to reduce the running cost and implement the real unattended operation. [ABSTRACT FROM AUTHOR]

In this paper, multilevel fuzzy analysis method is used to making a comprehensive evaluation on the health hazards of workers exposed to electric field in 500kV substation. The five different regions of 500kV substation is identified as the first level index, according to the specific measurement substation of each area to set up the second level index. The first level weight is established according to the proportion of the retention time of the workers in the different areas, and the weight of the second level is determined according to the proportion of the measuring points. Establishing five comment sets, and carrying out the fuzzy comprehensive evaluation according to the maximum membership principle, eventually come to the conclusion: although the measured data show that a small number of electric field intensity exposure value of 500kV substation beyond the requirements of the International Commission on non-ionizing radiation protection (ICNIRP) and the requirements of the People's Republic of China(PRC), but workers have very little contact time, therefore, it cannot be explained that there is a large occupational health hazard in 500kV substation. The multilevel fuzzy analysis method can be used to evaluate the health hazards of the electric field in the substation working environment well, it avoids the subjective and limitations of the traditional methods, and can be able to make a more accurate and objective judgment of the substation [ABSTRACT FROM AUTHOR]

At present, the terminal Cabinet used in the substation is mostly integral type, the terminal Cabinet adopts fixed wiring mode, the texture is mostly iron, and the few are stainless steel. Inside it, all kinds of air, cable and terminal block are fixed in the terminal Cabinet. Equipment replacement, and technical projects to promote, often need to transform the terminal Cabinet, this time, you need to remove the terminal Cabinet as a whole, the cable cable removed, while replacing the overall terminal block, often replace the terminal block, then the cable Installation, it will cause the terminal block, open space, shell, etc. can not be used twice, resulting in a great waste, while the replacement of power outages for a long time, construction workload, therefore, the team decided to develop a Prefabricated terminal Cabinet, the shell and the internal terminal blocks and empty open modular Prefabricated way, the replacement of the terminal Cabinet, you can easily replace the need to be part of the construction, rather than the terminal Cabinet as a whole construction, reduce power outages, Reduce the workload, saving labor costs, engineering costs. [ABSTRACT FROM AUTHOR]