海东电网继电保护整定计算管理软件开发-电气工程专业论文.docxVIP

ABSTRACTT ABSTRACT Title: The development of relay protection setting calculation management program about Haidong power Major：Electrical engineering Name：Dongya MA Signature: Supervisor：Prof. Xiaoping YANG Signature: Senior engineer Haiying SHI Signature: Abstract Relay protection is the protection of important technical means of safe and stable operation of power system, the power grid operation of relay protection device must be put into operation and to comply with four , namely, sensitivity, reliability, speed and selectivity requirements. With the development of electric power to the relay protection setting of the increasingly high demand, protection device can meet the requirements, mainly to see the protection device setting is correct or not. Because each district power network structure, level and operation status of voltage is different, therefore, is also different to the setting calculation of relay protection considerations. Differences in each area of Qinghai power grid, grid structure in most areas is very complex, the inner network, multiple transformer, double back and, more T, feedback, long-term single supply wiring way more voltage level from 6kV to 330kV (no 220kV voltage grade ). At the same time, because of the special nature of the Qinghai political, economic history, many parts of the power supply reliability requirements are very high, coupled with the power grid structure area is not strong, to power system protection is more demanding, therefore, for the setting calculation of relay protection requirements are very high. Plus the setting list reached nearly 1000 hair every year, calculation and management work extremely hard. With the continuous expansion of the scale of Qinghai power grid, the demand for power quality improvement, data sharing and dispatching department requirements, the existing calculation model and calculation tool is more and more difficult to meet the requirements of power system security, reliable operation, the