A Measurement Configuration Method for Harmonic State Estimation of Transmission Network

Abstract

The invention discloses a measurement configuration method used for power transmission network harmonic wave state estimation. The method comprises the following steps: Step 10) a power transmission network topology structure is obtained; Step 20) network information is acquired; Step 30) a data integrity degree is verified; if a data integrity degree requirement is satisfied, Step (40) will be performed; otherwise, Step 20) will be performed again; Step 40) data preprocessing; a first network topology structure matrix is obtained based on the transmission network topology structure obtained in the Step 10); processing is carried out on the a first network topology structure matrix to obtain a second network topology structure matrix; and Step 50) measurement configuration is carried out on a power transmission network, The method facilitates harmonic wave state estimation carried out on the whole network and harmonic wave pollution traceablility. Convenience is provided for professional personnel to carry out targeted treatment so as to improve safe and stable operation of a power grid.

Description

technical field [0001] The invention belongs to the technical field of power quality monitoring, and relates to a measurement configuration method for harmonic state estimation of a transmission network. Background technique [0002] With the development of power electronics technology, various power electronic devices such as inverters, rectifiers and various switching power supplies are connected to the grid on a large scale. The switching action of these devices injects a large amount of harmonics into the grid. At the same time, there are other nonlinear loads such as electric arc furnaces and electric welding machines in the power system. These loads have the characteristics of impact and unbalanced power consumption, thus becoming the harmonic source of the grid. Harmonic sources rapidly spread from local areas to the entire power grid, and the harmonic pollution in the power grid is becoming more and more serious, which greatly affects the power quality. Harmonic p...

AI Technical Summary

Problems solved by technology

However, the price of the harmonic monitoring device is still relatively expensive, and it is impossible to install it in the whole network, and it is only installed in the main nodes of some power grids

Meanwhile, harmonic state estimation has a strong dependence on the number and location of monitoring configurations

If the number of monitoring configurations is insufficient or the monitoring locations cannot meet the requirements, only the harmonic state of some nodes can be estimated

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