Electricity-to-gas conversion-gas storage-gas turbine capacity optimal configuration method and system with wind curtailment participating in power grid frequency modulation

Abstract

The invention discloses an electricity-to-gas conversion-gas storage-gas turbine capacity optimal configuration method and system with wind curtailment participating in power grid frequency modulation. According to the invention, an operation scene of producing natural gas by utilizing abandoned wind through PtG is innovatively proposed, the natural gas is stored through a gas storage tank, poweris generated through a gas turbine unit (NGGU) to participate in frequency modulation, and a coordinated operation strategy of each device is proposed; then, according to the operation strategy, a cost-income model of the PtG, the gas storage tank and the NGGU participating in the frequency modulation process is constructed in the operation strategy, and capacity optimal configuration of each device is realized by taking maximization of net income as a target; finally, the actual wind curtailment of a certain wind power plant and an actual issuing instruction of certain automatic generation control (AGC) are taken as references; planning calculation is carried out through a particle swarm optimization algorithm, and the economy and feasibility of participating in the frequency modulation auxiliary service of the power market under the optimal configuration of PtG, gas storage and NGGU capacities by utilizing the wind curtailment and PtG technologies of the wind power plant are analyzedthrough results.

Description

technical field [0001] The present invention relates to the technical field of renewable energy consumption, in particular to a power-to-gas-gas storage-gas turbine capacity optimization configuration method and system in which abandoned wind participates in power grid frequency regulation. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Power-to-gas (PtG) technology provides a new solution for the on-site consumption of renewable energy. PtG converts the output of renewable energy that is difficult to absorb during the period of wind curtailment into natural gas or hydrogen. [0004] At present, there have been many related technical researches on PtG technology to improve the level of wind power consumption in the system. The existing technologies use PtG equipment to convert surplus wind power into natural gas, which is stored or utiliz...

AI Technical Summary

Problems solved by technology

The existing technology adopts the joint frequency regulation of PtG and gas turbine, but its joint call strategy is relatively simple, and the group with lower cost is prioritized, without considering the difference in frequency regulation performance between the two, and the current frequency regulation auxiliary service market is aimed at different frequency regulation There will be different gains in performance

In the existing technology, the PtG plant is regarded as the load side, and the PtG plant is responded to the demand side to realize the real-time response to the AGC command. However, this form of frequency modulation requires high wind curtailment, and it is difficult to perform frequency modulation when there is no wind curtailment. And when the demand side responds, it will lead to a decrease in the power of the PtG plant, which will reduce the utilization rate of the abandoned wind; while only using the power grid purchase method will increase the cost of frequency regulation, which will further reduce the economy of the PtG equipment that is originally economical.

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