Coordination operation method of pneumoelectric integration energy distribution network system

Abstract

The invention relates to a coordination operation method of a pneumoelectric integration energy distribution network system. An alternating current trend in a power distribution network and gas water conservancy calculating in a gas distribution network are simultaneously considered. A combined cooling heating and power system (CCHP) in a system is taken as a coupling component of the gas distribution network and the power distribution network. Mathematical modeling is performed on a nonlinear multi-energy coupling external characteristic of the CCHP system. Through coordinating and optimizing operation of the CCHP system, a power fluctuation of distributed new energy of the power distribution network is transferred to the gas distribution network and a cold / heat supply system so that a power distribution network connection line exchange power fluctuation is restrained. For a mixing integer non-linear planning problem corresponding to the above model, the invention provides a two-stage optimization algorithm to solve. A simulation example shows that under the condition that a new energy utilization rate of an integration energy system is guaranteed, the method can be used to effectively restrain the power fluctuation on a connection line under different season scenes.

Description

technical field [0001] The invention belongs to the field of comprehensive energy system operation, and relates to a method for coordinated operation of a gas-electricity comprehensive energy distribution network system. Background technique [0002] With the rapid popularization of distributed power generation technology, the proportion of distributed wind power and photovoltaics connected to the distribution network continues to rise. However, the output power of new energy power generation is fluctuating. If it is not suppressed, the power fluctuation will be transmitted to the transmission network through the tie line, thus forming an impact on the transmission network. At the same time, due to social and economic development and policy stimulation, the construction of a regional gas-electricity integrated energy system on the distribution network side has become a new model of future energy supply. The integrated energy system uses coupling elements to closely link the...

AI Technical Summary

Problems solved by technology

However, in the integrated energy distribution network system, the CCHP system is used as a distributed power source and gas load, and its operation status will have an impact on the distribution network and gas distribution network.

None of the existing distribution network operation methods considers the use of the multi-energy coupling characteristics of the CCHP system to stabilize the power fluctuations of tie lines caused by distributed new energy sources.

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