Risk reduction scheduling method for electricity-gas interconnected energy system under condition of fan failure

Abstract

The invention provides a risk reduction scheduling method for an electricity-gas interconnected energy system under the condition of fan failure, which is used for solving the problem of high risk forthe safe operation of the electricity-gas interconnected energy system due to the failure of a wind turbine generator set caused by faults of a power grid and the generator set in the prior art. Themethod comprises the steps of establishing a fan failure risk indicator of the electricity-gas interconnected system considering P2G based on the operation characteristics of the electricity-gas interconnected system and the fan failure risk; fully considering the constraint of an electric power system and the constraint of a natural gas system, establishing a multi-objective optimization model with the minimum risk of fan failure and the minimum coal consumption cost of a coal-fired unit so as to solve the contradiction between the risk and the coal consumption cost in the operation process of the system, thereby realizing risk reduction scheduling of the electricity-gas interconnected energy system, and improving the wind power consumption capability of the electricity-gas interconnectedsystem.

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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