Medium and long term energy optimization method for electricity-heat-gas multi-energy flow system considering large gas storage

Abstract

The invention discloses a medium and long term energy optimization control method for an electricity-heat-gas multi-energy flow system considering a large gas storage. The medium and long term energy optimization control method comprises the following steps of: firstly, acquiring network information of the electricity-heat-gas multi-energy flow system and source-load data and price information of a typical representative day; secondly, building a network model and constraints of the multi-energy flow system; and then proposing a medium and long term energy optimization control model of the electricity-heat-gas multi-energy flow system considering the seasonal peak regulation effect of the large gas storage. From the perspective of medium-and-long-term operation, by controlling the gas charging and discharging amount of the gas storage in different time periods, cross-season transfer of natural gas supply is achieved, the operation cost of the multi-energy-flow system is reduced, and the energy supply safety and reliability of the system are improved.

Description

technical field [0001] The invention relates to an energy optimization method for a multi-energy flow system, in particular to an energy optimization control method for an electric-heat-gas multi-energy flow system. Background technique [0002] With the development of the Energy Internet, the power system, thermal system and natural gas system are connected through a large number of coupling devices to form a joint operation of electricity-heat-gas multi-energy flow system. The electric-heat-gas multi-energy flow system connects various subsystems, realizes interconnection and collaborative optimization between systems, and reduces the overall operating cost of the multi-energy flow system. Due to the increase in gas load, heat load and electricity load in winter, the phenomenon of "gas shortage" has appeared in many places in winter in recent years. [0003] In order to alleviate the contradiction between supply and demand of natural gas, many cities have begun to build l...

AI Technical Summary

Problems solved by technology

However, most of the current energy optimization strategies for electricity-heat-gas multi-energy flow systems take into account the short-term optimal operation of small gas storages, that is, the optimization of the day-to-day and intra-day. Energy optimization control method for large-scale gas storage, by controlling the charging and discharging volume of large-scale gas storage at different time periods, to solve the medium- and long-term optimization problem of electricity-heat-gas multi-energy flow system

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