Distribution network power flow calculation method of self-adaptive grid structure

Abstract

The invention discloses a distribution network power flow calculation method of a self-adaptive grid structure. The method includes performing the power flow calculation according to a calculation mode set by a user; verifying the electrical equipment parameters and the topological connection relations required by the power flow calculation; identifying an outgoing line switch and determining a control area according to the position of an interconnection switch; determining a calculation range according to the setting of the user; forming a network topology and a sub-network unit; determiningthe network type and determining the wiring mode of the sub-network unit; self-adaptively matching the corresponding power flow algorithm according to the type of the sub-network unit; performing theout-of-limit, heavy load or network loss calculation; and performing the three-phase power flow and the three-phase imbalance statistics. According to the method, the number of the network nodes is greatly reduced, the calculation speed and efficiency are improved; the advantages of the algorithms are maximized, the stability and the convergence of calculation are ensured; the requirement of a dispatcher on the on-line power flow can be well met, and the application prospect is good.

Description

technical field [0001] The invention relates to an automatic distribution network scheduling method, in particular to a distribution network flow calculation method with an adaptive grid structure. Background technique [0002] Distribution network power flow calculation is one of the most basic network analysis software of DMS. Dispatchers and operators can use it to study the possible operating conditions of the current distribution network and check the safety of operations; planning engineers can use it to design and evaluate future distribution networks. construction plan. The distribution network power flow calculation software is also the basis of other advanced application software. Various analysis modules such as static security analysis, voltage stability analysis, and economic constraint scheduling of the power grid all rely on the results of the ground state power flow. [0003] The operation mode of the distribution network is mostly radial network and weak ri...

AI Technical Summary

Problems solved by technology

[0035] Disadvantages of the Newton-Raphson method In the case of dealing with radial networks or weak ring networks, it is still necessary to perform complex calculations such as admittance matrix, Jacobian matrix, node number optimization, etc., because the distribution network is mostly radial or weak ring Network operation and a large number of nodes, the calculation advantages of the Niula method are not obvious, and the difficulty and complexity of the calculation are aggravated, and it is difficult to adapt to the online trend requirements

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