Control Strategies Of Three-phase Load Balance For IDC And Research On The Soft-switching

With the rapid development of the Internet and the increment of the dire need of online resources, the amount of the requirement over the bandwidth, data management and maintenance in a variety of websites accrues swiftly. Many enterprises and ventures, which fail to build the network and are lack of the capability of management themselves, entrust the related affairs to those ventures with the IDC (Internet Data Center) in the process of their business expansion, and thereby a great multitude of energy consumption produces. A challenge of how to reduce the IDC energy consumption efficiently has become an issue facing all enterprise and public institutions, IDC construction unit and computer room design department.As an important index in the three-phase power quality, the three-phase imbalance brings innumerable amount of energy consumption. In those establishments with IDC, as the huge consumption of electricity in the circuit could usher in the heavy current, the unbalanced three-phase load power consumption hereby is also substantial large in amount therewith. To reverse the situation is to lower the wastage and therefore realize the energy conservation and emission reduction. As one sub project in the major science and technology projects of Zhejiang province, it is expected to provide substantial support and basis for the progress and the subsequent steps of the project itself.In this dissertation, the characteristics of the IDC three-phase load are analyzed through the research on the present status of the related issue and the elucidation of the computing method in reference to the degree of unbalance and the synthetic model over the load is established in the improvement of BP neural network algorithm in order to achieve the full fledged control strategy of three-phase balanced load. In order to cast light on the basic theory of three-phase load system, many a model is introduced to fully complement and testify the specific functional properties in the constantly supplemented application of the control strategy. The three-phase sequential detection experiment and the phase automatically sequential adjusting experiment as well as the related simulations and experimental results are worked out in the annual period.Instead of hard switching in the research of commutation process, the soft switching is utilized here to lessen the switching loss and then uplift the effectiveness of the power circuit and the capacity of processing the power against the EMI. The blueprint of soft switching is designed with its formulation being deduced and the related experiments being performed on the basis of commutation theory and the comparison and the experiments of phase shift in the different commutation process.The combination of ARM processor with the stepping motor is adopted to constitute the control system in order to automatically control the soft switching device. With the introduction of ARM processor and the stepping motor, the control strategy of speed and position on the basis of ARM is elucidated. The commutation soft switching device has no disturbance and is able to achieve stable switching control under the electrical load through the initial experimental verification.