Model predication control based cooling heating and power generation type micro-grid operation method

Abstract

The invention discloses a model predication control based cooling heating and power generation type micro-grid operation method. The method comprises the steps of building a predication model to predicate the wind power, photovoltaic power and cooling heating power generation load power data within a control time domain in the future; solving a rolling optimizing model at every moment according to the latest predication result and the real-time operation state of each device; calculating the force output of each device at the following time quantum; re-calculating the rolling optimizing model at the next time according to the latest predication result, monitoring the actual wind power value, photovoltaic value, cooling load value, heating load value and power generation load value on real time; updating the historic data; solving and feeding back to correct the model at every 5 minutes to obtain the adjustment of each device; distributing to each device for adjusting until reaching the next rolling optimizing time. With the adoption of the method, the influence of inaccurate predication on the optimal operation of the system can be removed well, thus the system operation risk is reduced, and the system operation stability is improved; meanwhile, the economy of the operation of a cooling heating and power generation type micro-grid can be increased.

Description

technical field [0001] The invention belongs to the field of combined cooling, heating and power supply systems, and in particular relates to an operation method of a combined cooling, heating and power supply type microgrid based on model predictive control. Background technique [0002] At present, the combination of clean energy represented by natural gas and the use of renewable energy, as well as the use of waste heat and pressure of generators, together constitute a combined cooling, heating and power micro-grid, which has become a clean and new energy industry that is rapidly developing at home and abroad. . The combined cooling, heating and power microgrid system is installed on the user side in various ways such as small-scale, small-capacity, modular and decentralized, and can simultaneously meet the user's demand for cooling energy, heat energy, and electric energy. The energy supply system saves traditional Centralize the initial investment cost of energy delive...

AI Technical Summary

Problems solved by technology

However, due to the fluctuating and intermittent characteristics of renewable power output, and the more random nature of users' electricity consumption behavior, there are often deviations between the predicted and actual values ​​of load and renewable power power, resulting in actual conditions that often deviate from the current situation. Scheduling plans seriously affect the optimal operation of combined cooling, heating and power microgrids

Images