Principle Analysis Of The Protection Devices For The Power-plant And The Development Of The Calculation Software

With the rapid development of economy, the increase of installed capacity of thegenerator in power systems. Power system security and stability play a crucial role to thedevelopment of national economy, so the relay protection setting calculation of generatortransformer unit is particularly important.For relay protection device to the current domestic manufacturers are mainly Nanrui,Beijing sifang, Xuji, Nanzi and other several big manufacturers. This article through to theseveral big manufacturers of comparative study of the principle of protection and protectionsetting calculation of actual experience, the author thus field loss protection of generator,the generator rotor surface negative sequence over load protection, transverse differentialprotection, generator transformer zero-sequence over-current protection and the protectionof the transformer over-excitation protection and so on several common analyzed theprinciple and put forward in the process of actual setting should pay attention to someproblems. These problems are real problems in the process of protection setting calculation,for future protection setting calculation provides a good reference. Some protection at thesame time in the operation of the actual production is also due to the problem of fixed valueof maloperation causes were analyzed, points out the ignored in setting calculation ofdetails, help to improve the whole protection setting process.In this paper, the focus of the work is for protection setting calculation of the templateto develop and frame structure of setting software design. The author combined withmultiple protection setting calculation before experience, formed a general protectionsetting calculation template, this template covers the common some protectionconfiguration. The author in this template will each concrete to form the protectionconfiguration, convenient operation through the software realization of the template aftercalculation. At the same time the author has completed the setting calculation softwareframework design, in the next work simply by programming the corresponding operationassociate can complete the task of the whole software.