The Project Applying Study Of New Type Computer Relaying Protection For Generator-transformer Units

In power station, a high sizes units is always joined with high-voltage power net work according to the wire type of Generator-transformers units, so it's very important in the power system. The high sizes units once been destroyed by fault, it will lose so much money, because of its complex configuration and expensive manufacturing. So when we arrange the relay protection of the generator-transformer units. We must assure the units can run safely and reduce the range of fault in farthest, and try our best to avoid turning off for needless, making sure the system stabilize work in safety. In traditional protection, because it used many relays, input setting too complex, protected fixation has a low precision can't suit for the new request by power system. Along with the fast development of computer and communication technique, the development of protection has a new energy so computer relaying protection is used in practice widely as a standard fixation at present. It can improve stabilize circulate level in safety, make the reliability and veracity in power system to a new step.The thesis bases on the running experience of protection device and the reform project of Generator-transformer units in Sichuan Jiang you power plant. It analyzes the principle of new type generator-transformer units for computer relaying protection detailed. It proves sufficiently that the computer relaying protection device can suit for the request of power system that is reliability selectivity, speed and sensitivity. At the same time, It solve the fixation and the application technique between Generator-transformer units and new type computer relaying protection, simulate all kinds of faults and analyzed the data;Investigate the question and scheme about computer relaying protection units for practicing circulate of generator-transformer units.The theory of the thesis is contacted with practice. It makes the Generator-transformer units be setting. A discussion is made on the design of protection. It takes advantage of the feature of computer relaying protection device to monitor the generator-transformer units. It simulates the faults in order to that the device can make the right analysis and put the solved way in time. The theory analysis and a lot of module test and complete test to prove it is effective that Generator-transformer unit protection is reformed to computer relaying protection. All of this offer the reliable proof and operating experience for extending the Generator-transformer units computer relaying protection device.