Device Configuration And Setting Calculation Of Plant Protection

Now China's economy is developing rapidly,the demand for electricity is constantly increasing.In order to solve the shortage of electricity demand,many large capacity units have been put into operation,it will become more and more complex structure of power grid.In order to meet the requirement of power supply,safe operation of the electric system of the problem becomes especially important.In the operation of the power system may encounter various types of fault or abnormal operation mode,these conditions may will cause the accident of electric power systems,proceeded to destroy the normal operation of the system,reduces the service life of equipment,serious or even destroy the system stability,resulting in a large area power outage.So when a fault occurs,the fault rapidly,protection device should be removed selectively,narrowing the scope of failure.First this paper outlines the relative theory of the calculation of short circuit,combined with Shanxi Yuncheng actual plant data plant with transformer and high voltage motor parameters calculation,imputation,unifies factory in parameter calculation based maximum and running mode of the transformer and high voltage motor connection method is given and minimum operation mode of network diagram,calculated maximum operating mode and minimum operation mode of short circuit calculation results.Secondly,according to the task and protection configuration of relay protection setting value calculation steps system overview and from power plant with parts,factory transformer and high voltage motor in three aspects to illustrate the protection configuration of the power plant,around the plant and high voltage motor start with the setting principles.Finally,surrounding large generators and power plants with variable,plant high voltage motor protection setting calculation,with the G60 protection device of large generator and factory use of some electrical equipment as an example for detailed protection setting calculation and get the equipment protection action value,and according to the same equipment between different protection coordination and setting the operating time of the protection at various levels.