第35卷第4期 2014年4月
电力建设
基于改进粒子群算法的汽轮机
初、终参数优化算法
李慧君，周爱强，喻桥
（华北电力大学能源动力与机械工程学院，河北省保定市071003）
发电技术
摘要：在确保机组安全运行的条件下，通过优化汽轮机初、终参数，提高其变工况运行的效率，以提高机组的经济效益，对火电机组节能减排具有非常重要的意义。通过运用功率背压特性的通用计算方法确定排汽压力对汽轮机功率的修正曲线，从而得到各负荷工况下循环水系相邻运行方式的等效益点，进而获得等效益曲线。在循环水泵运行优化的基确上，结合逆序法变工况理论，建立了机组初压和背压的优化模型，以某厂C300-16.7/0.43/537/537机组为例，运用改进粒子群优化算法寻优得到了各运行工况的最优初压和背压。结果表明：当机组定负荷运行时，通过调整配汽方
式，可得到使供电效率最大所对应的主蒸汽压力和排汽压力，为火电机组的运行参数优化提供参考。关键调：滑压运行；汽轮机；功率；优化
OptimizationCalculationofInitialandFinalParametersin TurbineBasedonImprovedParticle Swarm Optimization
LIHuijun,ZHOUAiqiang，YUQiao
(School of Energy Power and Mechanical Engincering, North China Electric Power University，
Baoding 071003, Hebei Province, China)
ABSTRACT: Under the condition of safe operation, the efficiency of unit under variable operation condition and its economic benefit can be increased through the optimization of turbine' s initial and final parameters, which has very important significance to energy conservation and emissions reduction of thermal power units. The universal calculation method of power and back pressure characteristics was used to determine the corrective curve between turbine power and exhaust pressure, then the equal efficiency points between adjacen
eaeeaoeao
load condition was determined,
andtneequalericien
Based on the operation optimization of
obtained.
circulating pump, the optimization model of unit' s initial pressure
established, combined with reverse
method of variable condition theory. Taking C300 16. 7/0. 43/537/537 unit in a power plant as example, the optimal initial and back pressure under different operation conditions were obtained by using improved particle swarm optimization. The results show that the main steam pressure and exhaust pressure at the maximum power supply efficiency can be obtained by adjusting steam distribution mode under certain load operation of unit, which can provide reference for the operation parameters optimization of thermal power unit.
KEYWORDS: sliding pressure operation; turbine; power; optimization
中图分类号：TK263
文献标志码：A
DOI; 10. 3969/j issn. 1000 7229. 2014. 04. 018 0引言
文章编号：1000-7229(2014)04010106
电企业，提高机组的一次能源利用率，降低发电成本，已经成为其发展的必然趋势。随着经济飞速发展，自
目前，发电机组主要以火力发电为主，在获得电能的同时消耗了大量的一次能源，并且随着社会的发展和人民生活条件的改善，对电负荷的需求增加使得能源消费规模不断扩大，导致供需矛盾越来越突出，各电厂实行节能降耗战略显得尤为重要。对于各发
万方数据
动化程度不断提高，仅仅依靠对发电系统中的主机辅机、管路系统等各设备进行技术改造，已远远不能满足使整个系统达到最优运行的目的(")。
运行方式的选取与机组的安全经济运行有直接关系，为使机组在非额定运行工况保持较高的效率，
http://www. cepc. com. cn