Abstract
The issue of real-time deep down-regulation ancillary service has received increasing attention in the Northeast of China. Participation of combined heat and power plants with multitype units and flexible heating devices in the market is investigated. This paper establishes a model of feasible operating region and the coal consumption function for the combined heat and power plant. An internal optimal dispatch model and the minimum overall electric power output model for the plant satisfying a given heat load are presented. Furthermore, the models of total cost for down-regulation and average cost for deep down-regulation in two levels are established. These models are validated based on the realistic data of the plant in the Northeast of China. In case studies, the influence factors and change rules of the minimum electric power output, the total cost, and the average cost of plants are analyzed.
Highlights
In recent years, the issue of wind curtailment in Northeast China is very serious, especially during the heating period
The reason is that Combined Heat and Power (CHP) units have to generate electricity at high levels due to “the power-heat coupling”, which takes up a great portion of the power generation space and very small is left for wind power
A minimum electric power output model under a given heat load and an internal optimal dispatch model are established for the plant that consists of extraction condensing units, extraction condensing units with the ability of LP-cut-off, extraction back-pressure units, the Electric Boiler (EB), and the Heat Accumulator (HA)
Summary
The issue of wind curtailment in Northeast China is very serious, especially during the heating period. Energies 2020, 13, 787 in real time and how to formulate a bidding strategy for CHP plants in the DDR market based on these parameters need to be further studied. When a plant contains level, the main concerns are the impact of the decoupling on integration of renewable energy, energy different types of units, the problem becomes more complicated. Of plants with extraction condensing units and HA through predicting the behavior of competitors, in the context of the Northeast China DDR market, there is little literature on the operational and obtains very conclusions. Northeast China real-time DDR market, several general models are established, including the operating. Models of Operation Constraints for Multitypes of Units and Flexible Heating Devices
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