A risk-reducing scheduling method for electric-gas interconnected energy systems under the failure of wind turbines

Abstract

The present invention provides a risk-reducing dispatching method for an electric-gas interconnected energy system under the failure of a wind turbine, which is used to solve the problems caused by the fault of the power grid and the failure of the unit itself in the prior art to the safe operation of the electric-gas interconnected energy system. For issues with higher risks, including based on the operating characteristics of the electrical-gas interconnection system and the failure risk of wind turbines, the establishment of fan failure risk indicators for the electrical-gas interconnection system considering P2G; fully considering the constraints of the power system and natural gas system, the establishment of the following A multi-objective optimization model with the least risk of wind turbine failure and the least coal consumption cost of coal-fired units is used to solve the contradiction between risk and coal consumption cost during system operation, so as to realize the risk-reducing scheduling of the electricity-gas interconnection energy system and improve the electricity-gas interconnection The ability of the system to absorb wind power.

Description

technical field [0001] The invention relates to the field of electric-gas interconnection system control, in particular to a risk-reducing scheduling method for an electric-gas interconnection energy system under the failure of a fan. Background technique [0002] Driven by the energy crisis and environmental problems, wind power and other new energy power generation has developed rapidly, but due to the fluctuation of output, the difficulty of wind power consumption has become an urgent problem to be solved in the field of electric power and energy. The role of natural gas resources in the energy balance has been continuously strengthened, and its environmental protection, high efficiency, and abundant reserves have attracted more and more attention to gas-fired power generation. Natural gas is an important primary energy source, and the natural gas network has a similar energy flow form to the electric power network. With the large-scale grid connection of gas-fired units...

AI Technical Summary

Problems solved by technology

[0005] At present, the operation and regulation of each energy system are basically independent of each other, which not only results in low comprehensive utilization efficiency of energy, but also causes lack of mutual support and coordination among energy systems in emergencies such as failures, and may even deteriorate the operating status of the system.

In recent years, research on the optimal operation of electrical-gas interconnection systems has gradually increased, but the relevant methods basically take economy as the optimization goal, and do not consider the security risks of the interconnection system.

At present, there are methods for reducing the risk of a single power system when the wind turbine fails, but the special operating principle of the power-to-gas unit and the control strategy of the gas unit make the characteristics of the safety risk of the power system in the power-gas interconnection system different from that of a single power system. The scheduling method of a single power system is difficult to be directly applied to the electric-gas interconnected energy system

Therefore, the existing scheduling methods do not consider the impact of the gas system on the operation risk of the power system. For the electric-gas interconnected energy system including wind power, the system operation risk caused by the failure of the fan may increase, which is not conducive to the safety of the system. run

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