Photovoltaic absorbing method for rural micro-energy grid considering building thermal balance and comfort

Abstract

A photovoltaic absorbing method for rural micro-energy grid considering building thermal balance and comfort is disclosed. The whole structure of rural micro-energy grid is established: household decentralized electric heating supply system and village centralized photovoltaic access and cooperative power supply system. The heat balance model of building is based on indoor air and building envelope respectively. The heat balance model of indoor air and the heat balance model of inner surface of envelope are established to describe the heat balance process of indoor heat gain and loss. The day-ahead economic dispatching model of rural micro-energy grid is constructed: the objective function is to maximize the economic benefits of energy suppliers, and the constraints of power balance, comfort and other constraints are considered; Genetic algorithm is used to solve the day-ahead economic dispatching model of rural micro-energy grid: modifying the constraint conditions of individuals whodo not meet the constraint conditions screening and modifying, and selecting the optimal individuals in the iteration of genetic algorithm. The photovoltaic absorbing method for rural micro-energy grid considering building thermal balance and comfortnot only ensures the economy but also solves the problem of power grid consumption, and promotes the improvement of the resource utilization efficiency of the micro-energy grid.

Description

technical field [0001] The invention relates to a photovoltaic consumption method for a rural micro-energy network. In particular, it involves a photovoltaic consumption method for rural micro-energy grids that considers building thermal balance and comfort. Background technique [0002] With the development of energy supply technology and the promotion of related policies, China has adopted a photovoltaic poverty alleviation policy to solve the problem of economic sources of living for rural poor people since 2016. A large number of photovoltaic devices are installed on the roofs of houses with solid structures and public open spaces in villages. However, the low power load and weak grid structure in rural areas make it difficult for photovoltaic grid-connected consumption. At the same time, in middle and high latitudes, traditional coal-fired heating with low energy efficiency and serious pollution is no longer applicable under the new energy supply situation. Many countr...

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Problems solved by technology

[0004] However, for traditional absorptive strategies, there are certain limitations in practical applications

First, the heat demand is represented by a fixed curve that does not meet the user's energy consumption characteristics. In fact, the user's perception of temperature has a certain degree of ambiguity, which can be called a temperature constraint. The resulting heat demand is an adjustable second, the traditional scheduling strategy does not take into account the dissipation and thermal inertia of the building, and it is difficult to accurately reflect the heat demand for building heating; third, the traditional new energy consumption strategy for centralized heating equipment is mainly based on The characteristics of combined heat and power units make it difficult to directly transplant to energy supply systems based on distributed heating equipment

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