Analysis Of Regional Safety And Research Of Dynamic Capacity Increase In Oilfield Thermal Power Plant

The Daqing oilfield power grid is designed for ring open loop operation.The so-called closed loop operation is to close or disconnect the 35 thousand volt line constant breakpoint(closing loop)switch,or to make up or disconnect the electromagnetic loop network after three voltage levels.In order to ensure the continuous power supply to the users,a large number of closed loop operations are needed to complete the normal maintenance,the handling of various anomalies and the transfer of the load during the operation of the power grid.If the selection of the closing ring is improper,the current which flows through the ring is large,it may cause the line protection action switch to jump,and may cause the load rejection accident,the serious overcurrent even will burn down the power supply equipment,there is a great safety risk,the technology is more complex and difficult to control.In particular,the contradiction between the combined operation of the oil field thermal power plant and the external system is very prominent.After the #4 is incorporated into the system,the problem is more complicated and serious.Therefore,the security risk of the joint ring problem can not be ignored.It should be carefully studied and formulated to reduce the risk strategy to ensure the safe operation of the power grid.In this paper,first of all,the #4 generator in the oil field thermal power plant is not connected to the system according to the design scheme,but through the connection of the bus line via 220 k V red a red a B line and the red flag change system,which leads to the analysis and study of the large safe operation risk of the regional power grid with the combined ring of the oil and power plant system and the external system,and to find out the hidden dangers in the regional power grid.There is a place.Then,the paper analyzes the theoretical basis of the dynamic capacity expansion of the transmission line,and through the analysis of the influence of the change of the wire temperature and the weather conditions on the line load,and based on the steady heat balance model,based on the construction of the steady state model of the dynamic thermal capacity of the wire,the dynamic Compatibilization of the field line is studied.The dynamic compatibilization model is verified by regression analysis and actual meteorological data.Finally,according to the actual production situation,36 sets of traverse comprehensive monitoring devices are installed on the 12 lines.Through the measurement of the wire environmental information and the acquisition of real-time tidal current data,the dynamic adjustment of the protection fixed value is carried out to provide the basis for the rationality of the transmission line compatibilization,and the short time of the line in the process of regional power network closing is solved.The problem of limited transport capacity.Finally,it provides the theoretical support for the closed loop operation of the power grid dispatching,maximizing the efficiency of the line operation,improving the safe and stable operation level of the regional power grid of the oil and power plant,and providing reliable power support for the oil and gas production.