Virtual power plant economic and safe scheduling optimization method

Abstract

The invention provides a virtual power plant economic and safe scheduling optimization method, comprising the following steps: (1) inputting predicted data of electricity price and wind turbine output; inputting a market contract parameter and a penalty parameter; inputting gas turbine and pumped storage power station parameters; and building a virtual power plant economic scheduling model, which includes constructing an optimization goal (namely, building a function with maximum profit as the objective), and constructing constraints: upper and lower limit constraints of power output, ramp rate constraint of power output, maximum and minimum start-stop time constraints of a controllable power supply, and energy balance constraint; (2) inputting distribution network structure parameters and power flow constraint parameters; and building a virtual power plant safe scheduling model, including power constraint of a line, node voltage constraint, and exchange power constraint of the connecting point between a distribution network and a main network; and (3) calling GAMS software to solve a built nonlinear mixed integer programming model, and outputting the optimization result. Through the scheduling scheme obtained in the invention, safe and stable operation of the power grid is ensured while economy is improved.

Description

technical field [0001] The invention belongs to the field of power system dispatching, in particular to an optimization method for economical and safe dispatching of a virtual power plant. Background technique [0002] In recent years, fossil fuels have become increasingly scarce and environmental pollution has intensified. In order to solve the above problems, renewable energy power generation, especially wind power and photovoltaic power generation, has developed rapidly. Although the power generation reserves of renewable energy are huge and clean, they often have strong randomness, and grid connection alone will have a great impact on the grid, which is not conducive to the stable operation of the grid. In the electricity market environment, the market activities of wind farms are very risky, and their actual power generation often deviates from the bidding power, thus suffering from imbalance penalties, so they are at a disadvantage in the competition with traditional p...

AI Technical Summary

Problems solved by technology

However, in fact, the optimal solution of economic dispatch is very likely to violate the power flow constraints of the power grid, causing problems such as overloading of lines and node voltage out-of-bounds, and causing harm to the safe operation of the power grid.

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