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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Control strategy study on frequency and peak-load regulation of coal-fired power plant based on boiler heat storage capacity
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Control strategy study on frequency and peak-load regulation of coal-fired power plant based on boiler heat storage capacity

机译：基于锅炉蓄热能力的燃煤电厂频率和峰值负荷调节控制策略研究

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摘要

Nowadays, quantity of coal-fired power plant and its single unit capacity are greatly improved in China, and power grid's frequency and peak-load regulation range become wider. Based on the basic regulation theory and unit's characteristics, this paper indicates the limitations of unit's original control strategies and such limitations have produced great damages to coal-fired boilers through assessment of 2 years statistical data of boiler tube explosion in regional power grid. Under field tests, the quantified boiler heat storage capacity of six typical thermal power units in the power grid is provided. Comparisons of these six coal-fired boilers are made for getting the relationships between BHSC and boilers' tube explosion ratio under the in-depth frequency and peak-load regulation. The results show that unit's boiler heat storage capacity varies greatly amongst boilers with different types and is inversely proportional to boiler's installed capacity and steam parameter class, and boiler heat storage capacity is inversely proportional to boiler's tube explosion ratio, which is in conformity with the theory analysis. After that, in-depth frequency and peak-load regulation tests of thermal power units are carried out, respectively. The results show pulverized coal-fired boiler with small boiler heat storage capacity is not suitable for in-depth frequency and peak-load regulation for the safety of power grid and unit itself, while the circulating fluidized bed boiler and pulverized coal-fired boiler with larger boiler heat storage capacity have better adaptability for these functions. Some effective control strategies of frequency and peak-load regulation are presented in load's rate and range by boiler heat storage capacity of units.
机译：如今，中国的燃煤电厂数量及其单机容量已大大提高，电网的频率和峰值负荷调节范围也越来越广。根据基本的调节理论和机组的特点，指出了机组原有控制策略的局限性，通过对区域电网锅炉管爆2年统计数据的评估，对燃煤锅炉造成了巨大的破坏。在现场测试中，提供了电网中六个典型火电机组的定量锅炉储热能力。通过对这六台燃煤锅炉的比较，得出在深度频率和峰值负荷调节下，BHSC与锅炉管爆比之间的关系。结果表明，不同型号的锅炉机组的锅炉蓄热能力差异很大，与锅炉的装机容量和蒸汽参数等级成反比，锅炉的蓄热能力与锅炉的管爆比成反比，符合理论。分析。之后，分别进行了火电机组的深入频率和峰值负载调节测试。结果表明，为保证电网和机组自身的安全，锅炉蓄热能力小的粉煤燃烧锅炉不适合进行深度频率和峰值负荷的调节，而循环流化床锅炉和粉煤燃烧锅炉具有较大的能耗。较大的锅炉蓄热能力对这些功能具有更好的适应性。通过机组的锅炉蓄热能力，在负荷率和负荷范围内提出了一些有效的频率和峰值负荷调节控制策略。

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