Dynamic compensation study of distribution network harmonic reconstruction based on equivalent harmonic source method

With the rapid development of the power electronics industry, a number of nonlinear devices are connected to the power grid, and the grid voltage suffers from severe harmonic pollution. For the treatment of harmonic voltage, it is necessary to master the real-time harmonic level of the distribution network, which brings a huge challenge to the cost and maintenance of harmonic measurement devices. Therefore, this paper aims to propose a dynamic compensation method of distribution network harmonic reconstruction based on the equivalent harmonic source method. Firstly, an equivalent harmonic source method is proposed, which can be used to reconstruct the harmonic voltages and harmonic currents of important nodes in the distribution network in real time to provide data support for network-wide harmonic compensation. Also, an optimization method is proposed for the selection of measurement nodes. Moreover, based on the harmonic reconfiguration of the distribution network, the harmonic voltage in the distribution network is managed so that the harmonic distortion rate of the grid is reduced below the standard.