Design Of The Power Supply System For Yidu Central Hospital Of Weifang

This paper analyse the load structure of the hospital,through the actual case that Yidu Central Hospital of Weifang city lOkV open and close the actual construction.Fully considering the load demand for power supply and power supply reliability requirements of Yidu Central Hospital of Weifang City,the supply and distribution system design scheme is designed and discussed,and the corresponding results are the selection of electrical apparatus.First of all,combined with the Yidu Central Hospital of Weifang City,the actual construction project of the substation location are analyzed.The results show that Weifang Yidu Central Hospital substation location is reasonable,in the earthquake and flood conditions will not affect the continuous power supply substation.Secondly,substation design scheme is given Yidu Central Hospital of Weifang City,including the substation location and access scheme comparison selection,lightning protection design,equipment selection and check calculation etc..In terms of primary wiring,lOkV is connected from two different 110kV substation outgoing lines.The lOkV bus line is connected by single parent section,which ensures the system’s easy maintenance and maintenance on the basis of ensuring the reliability of power supply.At the voltage side of the 400V,two back power supply is used for the important power supply units,and the outpatient building,the inpatient department and the comprehensive building are separately supplied.The short-circuit current of the distribution substation is calculated,and the main electrical equipments such as circuit breakers and transformers are selected according to the calculation results.A protection access scheme based on Ufit-u microcomputer protection universal device is given.Finally,the Yidu Central Hospital of Weifang city were graded load importance,and considering the transient fault and permanent fault for two cases of emergency power supply for Yidu Central Hospital of Weifang city were designed.The UPS system is composed of by-pass power,battery and internal combustion engine.When the instantaneous fault occurs,the battery pack is put into the short term power supply to ensure the power supply of the two and above loads.When a permanent fault occurs,an internal combustion engine is put into the power supply of the first and above loads.The key difference from similar studies is that considering the type of hospital electricity users for the reliability of power supply is designed for the special needs of emergency power supply,including the battery energy storage capacity and the calculation and selection of internal combustion engine power,the circuit design of UPS system.The Yidu Central Hospital of Weifang City,the design of substation lOkV similar hospital power supply and distribution system design to provide a reference.