Analysis And Evaluation Of The Reliability Of The Regional Ningdong Power Grid

With the constant development of reliability management for power facilities, the State Grid Corporation has introduced the concept of loop on the basis of reliability management of power transmission and transformation equipment so as to effectively analyze the reliability of power grid and optimize the mode of reliability evaluation. The loop outage combination model has also been built accordingly. By classifying different functional loops and combining with the mathematical statistics, it can reflect the status of different sections of power grid. The reliability management system of power transmission and transformation has been used to evaluate the outage events comprehensively. Hence, the reliability of power transmission and transformation oriented to the power grid will be formed by degrees.After collecting the material related to the development status of power reliability abroad, this thesis has analyzed the component-reliability evaluation parameter and statistical analysis index based on the component outage model. It has also pointed out the relationship between component reliability and loop reliability in terms of evaluation index. The loop-based power-grid reliability outage model has been built to determine the parameters and statistical index for reliability evaluation.By analyzing the power-grid breakdown component model, load model, operation mode and breakdown selection method, this thesis has employed the comprehensive analysis and simulated analysis to build the reliability evaluation model from the perspective of adequacy and security. The parameters needed are determined while the calculation method is also defined.By taking Ningdong Power Grid as an example, this thesis has evaluated the reliability of power system on the basis of normal operation flow calculation. In addition, this thesis has analyzed the weakness in the power structure, equipment management and operation management. In terms of technical measure and management measure, it has also proposed some feasible solutions.It is found that the power grid has kept expanding with the development of social economy and growing investment, which makes it necessary to analyze the security of power grid. Although this thesis can not exhaust the model, algorithm and application of power-grid reliability, it can still offer some countermeasures suited to the production, thus improving the reliability of power-grid operation.