Electrical System Design Of Jack-up

The development of marine engineering has been as the key areas of 12 th Five-Year development plan.In recent years,marine engineering,represented by constructing and designing the drilling platform,has gain a rapid development internationally.However,the platform construction technology of our country is still at a lower level,which needs to be further improved.In this paper,the main line is the construction of "new Shengli No.1" jack up drilling platform.Combined with the power grid optimization planning and the current advanced electronic control system design,a good power system was designed for the drilling platform.In the normal operation of the drilling platform,all aspects of the power system have different degrees of electric energy waste.In order to prevent the waste of energy and improve the utilization rate of energy,this paper analyzes the energy saving principle of the power system,such as power generation,transmission and distribution,power supply etc,and puts forward reasonable and feasible energy saving measures.At the same time,this paper introduces and summarizes the harmonic sources and control measures,and the simulation 24 pulse rectifier transformer system,this platform was used to control harmonic,was introduced in brief.Combined with the current advanced electronic control system design,a suitable grid structure is designed for the new platform.The model of generating set is selected by electric load calculation,and the model is also determined for the transformer,cable and other electrical equipment.The advantages and disadvantages of different control systems and drilling rig drive systems are discussed,and the appropriate control mode is selected for the new platform.In order to ensure the normal operation of the new platform,reasonable lighting system was designed and suitable circuit breaker model and protection setting were configured for the electrical system through the calculation of short-circuit current.In addition,the grid simulation model was established in DIgSILENT software,and the simulation results verified the correctness of the calculation results.