Hunan Electric Power ›› 2023, Vol. 43 ›› Issue (2): 60-65.doi: 10.3969/j.issn.1008-0198.2023.02.010

• Researches and Tests • Previous Articles     Next Articles

Analysis and Research of On-Line Energy Consumption Monitoring Model for Thermal Power Units

NIE Tao1, SHAO Feng2, YANG Wenzheng2, HE Xinrong2 , WANG Zhong′ao2   

  1. 1. Guoneng Ningxia Heating Co., Ltd., Yinchuan 750004,China;
    2. Guoneng Nanjing Power Experimental Research ICL, Nanjing 210046, China
  • Received:2022-09-05 Revised:2022-09-21 Online:2023-04-25 Published:2023-05-06

Abstract: Because of the limitation of on-line energy consumption measurement condition and instrument measurement precision, the coal consumption of on-line monitoring system usually has big error.To solve this technical problem, this paper adopts the state equation of thermal economy of power plant to dynamically solve the steam turbine heat rate, applying the idea of energy mass balance, the steam water distribution matrix equation of the whole thermal system is established.At the same time, the dynamic fluctuation characteristics of boiler efficiency are deeply studied, the factors of coal quality ash and heat dissipation are analyzed , the theoretical calculation models of exhaust heat loss, solid incomplete combustion heat loss and heat dissipation loss are established.For the dynamic calculation of auxiliary power consumption rate, the emphasis is on the accuracy of the electric meter and the allocation method of the public part of the power supplied to the factory. The online calculation accuracy of the unit energy consumption model is verified and the test results show that the on-line energy consumption calculation and monitoring model can meet the accuracy requirements of ASME standards.

Key words: online energy consumption monitoring, operating heat rate, thermal economy equation of state, standard coal consumption, dynamic coal consumption performance curve

CLC Number: