A Predicting Method of Peak-Load Regulation of Combined Heat and Power Units Based on Meteorological Data

Abstract

A method based on the meteorological data to predict the ability of peak-load regulation of combined heat and power unit was proposed. The problem that wind power was not accommodated by the power grid during the heat-supply period is solved. In the condition of the lowest indoor temperature which is 18C, the all heat consumers are taken as one room. The heat load of consumers and steam extraction amount under different outdoor temperatures were calculated. On this basis, the range of peak-load regulation was obtained by the working condition diagram of combined heat and power unit. The results show that the steam extraction amount increase with the decline of outdoor temperature, but the peak-load regulation range decreases. The method can accurately predict the range of peak-load regulation under different initial conditions (different outdoor temperatures) through the meteorological data, and the maximum error is less than 7%. Inthe supply-heat period, the power grid can accommodate and use the wind power at the maximum extent by this method, which provides the reference for power grid dispatching.