Power system harmonic state estimation based on PMU and ridge estimation

With the development of measurement in node voltage, branch current and nodal injection current phasor measurement system (PMU), the phase measurement system provides a new idea for power system´s online analysis. For the harmonic state estimation, we mainly use the PMU synchronized sampling which installed in different points of factory, that is, data acquisition device installed in different plants, the sampling time is synchronized to the same time base, which are the data harmonic state estimation required. Set up a simulation system layout the measurement points in a reasonable way, considering the points which measurement voltage and current values as a known quantity, establish a mathematical model. Applying the generalized ridge estimate to solve the mathematical model in order to obtain the harmonic voltage of each node in the system, and then determine the system´s harmonic state.