An improved reference grid evaluation method

Abstract

The invention related to an improved reference power grid evaluating method. The improved reference power grid evaluating method comprises following steps of giving out a current power grid parameter and the load predicted value in each period within a forward time scale, and planning a network candidate branch scheme; constructing an optimization model which aims at minimizing the annual power generating cost and the annual power transmission cost and comprises a plurality of constraints; processing a mixed integer nonlinear constraint formula in the optimization model, converting the mixed integer nonlinear constraint formula into a mixed integer linear programming model, solving the optimization model by means of a mixed integer linear programming method, and obtaining a final power transmission line capacity value. The improved reference power grid evaluating method can be used for adaptability evaluation of the current power grid under the load level in the forward time scale to make weak links of the current power grid be clear, actual operation mode optimization of the power grid, power grid topological correction control under accident conditions, fluctuation conditions of safe wind power and load power are considered and are used for optimizing the power grid programming scheme, the accuracy of the planning decision is improved, and professional and lean management of power grid development is achieved.

Description

technical field [0001] The invention relates to the technical field of grid evaluation, in particular to an improved reference grid evaluation method. Background technique [0002] The power grid plays an important supporting role in the process of power generation and load balancing. The capacity and margin of this balance are related to grid characteristics. How to evaluate and quantify it is of great significance to guide power grid planning. [0003] The reference grid provides a set of criteria against which existing networks can be objectively assessed. By quantifying the optimal investment cost and optimal congestion cost of the reference network, it can be compared with the investment and congestion cost of the existing network. By comparing the individual line capacity of the reference network with that of the existing network, the new investment required for the transmission system can be identified. Of course, the method can also be used to determine the numbe...

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Problems solved by technology

The Chinese patent with the patent application number 201510333979.9: "Reference grid model and solution method for power system evaluation and progressive planning" discloses a reference grid model and solution method for power system assessment and progressive planning. Its focus is on The solution of the large-scale system optimization power flow problem based on the DC power flow form, but it does not consider the current power grid situation, and it is difficult to clarify the investment direction of the power grid planning

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