Reference Grid Model and Solution Method for Power System Evaluation and Progressive Planning

Abstract

The invention discloses a reference power grid model used for power system evaluation and incremental planning, and a solving method. The solving method comprises the following steps: establishing an original model of a reference power grid; changing the original model of the reference power grid; adding an operating cost part of a system in a target function and a constraint condition after a circuit is disconnected so as to divide the variables of the whole model into two classes, and then, carrying out modeling and solving on two classes of variables; constructing a main problem model, wherein the model processes the problem of power generation dispatch and an optimal construction volume of the circuit under a normal operation state; constructing a sub problem model, wherein the model processes a problem of the operating cost minimization of the system under the state that the circuit is subjected to a disconnection accident; and constructing a connection between the main problem and the sub problem. A Benders decomposition method is applied to the solving of the reference power grid model, the integral scale of the model is dramatically lowered, the reference power grid model of a large-scale power system can be effectively solved, solving efficiency is improved, and the model can be applied to a progressive planning scheme of the system.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a reference grid model and a solution method for power system evaluation and progressive planning. Background technique [0002] As the basic industry of the national economy, electric power enterprises must develop ahead of the overall economic development, so as to provide guarantee for economic development. Power system network planning is the premise to ensure reliable power supply. With the rapid development of renewable energy power generation, the interconnection of large-scale power systems, and China's market-oriented reforms, the network planning of power systems is facing more severe challenges. [0003] As the impact of fossil fuel combustion on environmental pollution has received increasing attention, various types of renewable energy generation have flourished. Due to the unique distribution of renewable energy power generation, the intermittent and uncertai...

AI Technical Summary

Problems solved by technology

Due to the unique distribution of renewable energy power generation, the intermittent and uncertain characteristics of power generation, the power flow distribution of the system is more irregular, the fluctuation of the power flow of the line is strengthened, and the predictability becomes worse.

The main purpose of this application is to propose a mechanism for giving a reasonable evaluation of the overall performance of the system. Planning and construction based on this mechanism can not only improve energy utilization, but also avoid resource waste caused by excessive system construction.

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