THE USE OF SYNCHRONOUS VECTOR MEASUREMENTS IN THE CALCULATION OF STEADY-STATE MODES OF ELECTRICAL NETWORKS

Abstract

Calculation of steady state mode is the most used tool of modern electrical networks’ analysis. The current study is focused on the application of synchronized phasor measurements technology for steady state mode calculation. There is shown that the solely use of synchronized phasor measurements as initial information for calculating the steady state mode or in conjunction with traditional telemetry from Supervisory Control And Data Acquisition system (SCADA) has a number of advantages over classical methods, which is due to the simplification of the computational process, reduced time and required computational memory, and more reliable informational support. This paper presents the novel approach which consists in steady state mode calculations using accelerated and ultra-accelerated algorithms. These algorithms are based on the implementation of the method of determining values and special structure of the matrix of nodal admittances, what allow to reduce the number of equations, that must be solved in order to find the searched nodal voltages. Besides, there is no need to set balancing node, and dependences between searched and known nodal voltages become linear. The calculations performed for test scheme IEEE-14 demonstrate that both algorithms provide high accuracy results, increase the simplicity and speed of calculation by separate solving of linear equations.

Keywords

• nodal analysis
• matrix of nodal admittances
• phasor measurement unit (pmu)
• cada measurements
• method of determining values