规模风电并网条件下火电机组深度调峰的多角度经济性分析

Multi-angle Economic Analysis on Deep Peak Regulation of Thermal Power Units with Large-scale Wind Power Integration

火电机组深度调峰在提高风电利用率的同时降低了火电厂效益、增加了社会环境成本,文中多角度研究大规模风电并网条件下的火电机组深度调峰的经济性。首先根据火电机组的运行状态和能耗特性将其调峰过程分为常规调峰、不投油深度调峰和投油深度调峰3个阶段,并从技术角度分析影响火电厂深度调峰能力的主要因素,进而提出火电机组不同阶段的调峰能耗成本模型;建立了风电优先的经济调度模型,提出了基于煤耗量和基于期望产出的电力系统能源效率模型;并以典型10机系统为例进行仿真,从火电企业、风电企业和社会角度分析了大规模风电并网条件下,火电机组深度调峰的调度方案的经济性。研究成果将为制定火电机组深度调峰相关政策提供参考。

The deep peak regulation of thermal power units increases the utilization of wind power,however,it also leads to high economic costs for the operation of thermal plants.Meanwhile,fossil energy consumption and pollutant emission are also increased.Therefore,multi-angle economic analysis on the deep peak regulation of thermal power units is necessary.Based on the operational status as well as the power consumption characteristics of thermal power units,the peak regulation process is classified into three stages.The energy cost models for peak regulation of thermal power units at different stages are developed.Then,the economic dispatch model of wind power connected power system is provided,and two mathematical models for the calculation of energy efficiency of power system operation are proposed from the social effect point of view,in which one model is based on coal consumption and another based on desirable output.Finally,take a typical ten-unit system as an example,based on three aspects of thermal power plants,wind power companies and society,quantitative analysis towards the economy of deep peak regulation scheduling scheme of thermal power units is performed.This research provides a reference for the development of policies related to the deep peak regulation of thermal power units.