| The theater plays an import role as the carrier of art and cultural transmission,which is often a regional landmark of a city.Because of continuous development of China’s economic level as well as the desires of diversification of the spiritual and cultural life,the requirements of multi functional theater are significantly increasing.Recently,the reconstruction of theaters in cities,counties and towns in our country at all levels brings the theater construction into a prosperous period.This paper studies the electrical problems in the design,construction for a theater that has been put into operation.We demonstrate the concept of our design and consequences of the electrical problems,then present the final design and construction results.This electrical design provides a good reference for the similar theater project in future.The project discussed in paper correlates to a reconstruction for Class A theater.Low-voltage electrical equipment is composed by three level load.According to the design results of previous projects,the first level load includes double power supply circuit,and the power supply mode comes from the different low voltage line segments.In this project,the large load capacity including stage lighting and stage machinery will give rise to a high cost and contain a complex power distribution system with multi-level switching for the previous power supply.In design of the first level load distribution of such large capacity,we introduce the Single Busbar power supply instead of the previous design tradition.This new design exhibits well robustness.Theater conveys art,culture,artistic conception information to its audience through performance while lighting is an enssential tool to create performance space and show the atmosphere of the theater,and also provides the audience with direct visual experience.This paper introduces the composition and function of the light in the theater,and discusses the design results of the theater lighting combined with the problems found in the construction process.The main power supply circuit of sound system of theater is equipped by an isolation transformer,used to filter out the third harmonic.In the process of application,it is found that there is a "zero" voltage problem in the sound supply circuit of the sound system.This paper studies the causes of the problem and compares possible solution.Comparison indicates that the secondary grounding method is the best choice for the isolation transformer.With the widespread use of new energy,this project uses a distributed photovoltaic power generation system.For an example,the project applies the system composition,design principles,grid approach,cost forecasting.These could a helpful reference for similar projects. |
