A purely embedded power flow method and device for a three-phase active distribution network

Abstract

Embodiments of the present invention provide a method and device for a purely embedded power flow of a three-phase active distribution network. The method includes: establishing a three-phase active distribution network model, and the three-phase active distribution network model includes a three-phase bus and calculation nodes; under network constraints, perform power flow calculations on the three-phase bus and calculation nodes to obtain power; if the convergence of the power is known according to the convergence criterion value, then determine whether the step voltage regulator exceeds the voltage limit; if it is determined that the step voltage regulator does not exceed the voltage limit, the power flow calculation result is obtained. The purely embedded power flow method and device of the three-phase active distribution network provided by the embodiments of the present invention can simultaneously calculate the power flow under loads of different scales, so as to improve voltage stability and balance the transmission network.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a method and device for a purely embedded power flow of a three-phase active distribution network. Background technique [0002] Power flow calculation is a very important analysis and calculation of power system, which is used to study various problems raised in system planning and operation. The so-called power flow calculation is to calculate the bus voltage, current and power of each branch and network loss in the steady state operation of the power system with the known wiring mode, parameters and operating conditions of the power system. For the running power system, through the power flow calculation, it can be judged whether the grid bus voltage, branch current and power exceed the limit. If there is any limit, measures should be taken to adjust the operation mode. [0003] For the power system being planned, the power flow calculation can provide a basis for selecting the ...

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Problems solved by technology

[0004] The existing power flow calculation methods mainly include improved Newton method, optimal multiplier method, nonlinear programming method, homotopy method, etc., but these methods often fail to converge when faced with power flow calculations caused by high-power transmission. Therefore, there is an urgent need for a method that can overcome convergence failure in the face of power flow calculations caused by high-power transmission.

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