Receiving end power grid planning scheme optimization method based on multi-infeed short-circuit ratio check

Abstract

The invention relates to a receiving end power grid planning scheme optimization method based on multi-infeed short-circuit ratio check, and the method comprises the steps: determining a to-be-optimized receiving end power grid, and obtaining a basic power grid planning scheme; carrying out two sets of checking processing on the scheme at the same time to obtain two sets of scheme results, wherein the first processing comprises a short circuit checking step, a power flow analysis step and a stability checking step which are carried out in sequence, and the second processing comprises a multi-infeed short-circuit ratio checking step; judging whether the two scheme results meet actual planning requirements or not, if yes, taking the scheme results as recommended planning schemes, and obtaining a final scheme after next evaluation operation is carried out, and if not, obtaining the recommended planning schemes meeting the actual planning requirements after scheme adjustment is carried out on the scheme results obtained through checking processing; and performing comprehensive evaluation on the recommended planning scheme of the actual planning requirement to obtain a final planning scheme. Compared with the prior art, the method has the advantages that the planning level and the scheme reasonability of an alternating-current and direct-current series-parallel large power grid are improved.

Description

technical field [0001] The invention relates to the technical field of power system planning, in particular to a receiving-end power grid planning scheme optimization method based on multi-infeed short-circuit ratio checking. Background technique [0002] The formulation of conventional grid planning schemes is based on factors such as load demand forecasting, power supply planning layout, and grid construction conditions, and is a demand-oriented grid planning method with source-network coordination as the main line. In the verification of traditional planning schemes, the main focus is on the power balance of the power system, peak load balance, and short-circuit current verification of the main grid frame of the power grid, typical power flow analysis and system stability verification under common faults. After multiple rounds of power flow, short-circuit and stability checks and scheme optimization and adjustment, the recommended optimal or relatively optimal grid planni...

AI Technical Summary

Problems solved by technology

After multiple direct currents are centrally fed in, there will inevitably be complex mutual influences on the AC power grid

The traditional power grid planning method considers few factors, and it is still unable to significantly improve the planning level and scheme rationality of the AC-DC hybrid large power grid

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