Pan Lingling

Reserve indicator with security and stability constraints taken into account for power system security assessment

Security assessment is an important means to prevent large-scale blackouts. This paper proposes an overall evaluation indicator from a macro perspective of the grid security. The indicator is proposed from the view of the main task of the grid operation. It takes the reserve level as the carrier and sets various security and stability constraints on power outputs to get the total maximum output of generators, which gives the true ability of power output. Firstly the various operating constraints should be converted to be the output constraints of generators based on the existing studies of security assessment. Then the true ability of overall output of all generators would be obtained by an optimization model considering the above various constraints. A simplified model is got through reasonable simplification and is used for illustration. IEEE14 testing system and a practical system of one province in China are used to illustrate and verify the simplified model.

A software quality evaluation method for power dispatching automation system

The power dispatching automation system is widely used in power grid, a hazard or problem of power system will affect the security of power grid operation in a wide range. Software quality model of power dispatching automation system is built, and index system is proposed to evaluate software quality in this paper. Testing methods for indicators and comprehensive evaluation method are put forward, and then a comprehensive quality index is given, which improve the efficiency and accuracy of software evaluation. It provides a strong support for stable operation of power dispatching automation system and safe operation of power grid. Quality evaluation of state estimation, which is typical software of power dispatching automation system, shows evaluation method is feasible, and has a good value.