火电机组深度调峰工况下炉侧蓄热系数对一次调频能力的影响分析
摘要：为研究火电机组深度调峰工况下炉侧蒸发段、过热段蓄热系数对机组一次调频能力的影响，以暂态稳定程序PSD-BPA中的典型模型为基础，同时考虑火电机组实际以炉跟机协调方式下的控制逻辑，搭建适用于火电深度调峰工况下的精细化仿真模型。通过某额定功率Pe为1 000 MW直流炉在35%Pe工况点的实际一次调频数据，验证了模型的正确性。以仿真模型为基础，定性分析深度调峰工况下炉侧蒸发段及过热段蓄热系数对机组一次调频能力的影响，结果发现：炉侧蒸发段蓄热系数越小，机组的一次调频响应能力越强；炉侧过热段蓄热系数越大，对机组一次调频越友好，通过增、减蒸发段和过热段蓄热系数可以提高机组的调频能力。另外，建立的一次调频精细化模型可以为电力生产、监管部门提供火电机组一次调频裕度分析，有利于新型电力系统的安全运行。
Abstract:In order to study the influence of the heat storage coefficient of the furnace side evaporation section and superheating section on the primary frequency modulation capacity of the thermal power unit under the deep modulation working conditions, a refined simulation model suitable for the thermal power under the deep modulation working condition was built, based on the typical model in the transient stability program PSD-BPA, and the control logic of the thermal power unit under the actual furnace-machine coordination mode. The correctness of the model was verified by the actual primary frequency modulation data of a DC furnace with a rated power Pe of 1 000 MW at 35%Pe working conditions. Through the simulation model, the influence of the heat storage coefficient of the evaporation section and the superheat section of the furnace side on the primary frequency modulation capacity of the unit under the deep modulation condition was explored. It is found that the smaller the heat storage coefficient of the evaporation section on the furnace side, the stronger the primary frequency modulation response ability of the unit. The larger the heat storage coefficient of the superheated section on the furnace side, the more friendly it is to the primary frequency modulation of the unit. The frequency regulation capability of the unit can be improved by increasing or decreasing the heat storage coefficient in the evaporation and overheat sections. In addition, the refined model of primary frequency regulation established can provide analysis of the margin of primary frequency regulation for thermal power units for power production and regulatory authorities, which is beneficial for the safety of new power systems.
标题：火电机组深度调峰工况下炉侧蓄热系数对一次调频能力的影响分析
title:Analysis of the Influence of Furnace Side Heat Storage Coefficient on Primary Frequency Modulation Capacity Under Deep Modulation Condition of Thermal Power Unit
作者：李展, 杨振勇, 刘磊, 陈振山, 季卫鸣, 洪烽
authors:Zhan LI, Zhenyong YANG, Lei LIU, Zhensan CHEN, Weiming JI, Feng HONG
关键词：火电机组,深度调峰,蓄热系数,仿真模型,调频裕度,
keywords:thermal power unit,deep modulation,thermal storage coefficient,simulation model,frequency modulation margin,
发表日期：2024-04-30
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