Wind power consumption scheduling method for cogeneration system based on electricity price-load linkage response

Abstract

A wind power consumption scheduling method for cogeneration systems based on electricity price-load linkage response. This method introduces a real-time electricity price mechanism to generate new real-time electricity prices according to load changes. The new real-time electricity prices guide power users to respond, and realize load and real-time electricity prices. Linkage response, so as to guide the market behavior among the various entities in the power market, and make the load transfer across time periods. The installation of electric boilers in the heat load center decouples the constraint of "setting electricity by heat", which reduces heat loss during transmission. In the process of target optimization and solution, the overall dynamic inter-period transfer of daily load and the optimal coordinated control of thermal and electrolytic coupling are realized, so as to maximize the difference between the cost of absorbing wind curtailment and the cost of ancillary services, absorbing wind energy to the greatest extent, and reducing load peaks at the same time. Valley difference.

Description

technical field [0001] The invention relates to the field of optimal scheduling of electric power systems, in particular to a wind power consumption and scheduling method for a cogeneration system based on an electricity price-load linkage response. Background technique [0002] As a clean and renewable energy, wind power has broad prospects for development. Wind power output has uncertainties and obvious anti-peak shaving characteristics. While the installed scale of wind power is increasing rapidly, the phenomenon of wind abandonment often occurs. Especially in the "Three North" areas, the phenomenon of wind abandonment is serious. According to the 2017 wind power data from the National Energy Administration, the average wind curtailment rate in my country is about 12%, of which Gansu, Xinjiang, Jilin, Inner Mongolia, and Heilongjiang curtail wind by 33%, 29%, 21%, 15%, and 14% respectively. Analyzing the reasons, on the one hand, the power supply structure is unreasonab...

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Problems solved by technology

Or set the electric boiler inside the thermal power plant to absorb the abandoned wind and compensate for heat supply. The capacity of wind power consumption is limited by the capacity of the electric boiler

Or introduce demand price elasticity into the dispatching system, guide users to respond according to the difference in electricity prices at each moment, actively change the electricity consumption pattern, complete load transfer, and improve the capacity of wind power consumption during low load periods, but most of this demand response is through Numerical assumptions or social questionnaires, it is difficult to guarantee the accuracy of demand price elasticity response

[0004] To sum up, the current research has not considered the participation of electric boilers from the perspective of real-time electricity prices, and guided the power generation side, distribution side, power consumption side and other market players to actively cooperate with wind power consumption through economic signals.

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