电力系统自动化
電力繫統自動化
전력계통자동화
Automation of Electric Power Systems
2015年
18期
43-48
,共6页
许颜贺%周建中%薛小明%夏鑫%裴翔羽%李超顺
許顏賀%週建中%薛小明%夏鑫%裴翔羽%李超順
허안하%주건중%설소명%하흠%배상우%리초순
抽水蓄能机组%空载工况%全特性曲线%分数阶比例-积分-微分%粒子群优化算法
抽水蓄能機組%空載工況%全特性麯線%分數階比例-積分-微分%粒子群優化算法
추수축능궤조%공재공황%전특성곡선%분수계비례-적분-미분%입자군우화산법
pumped storage units%no-load condition%characteristic curves%fractional order proportion-integration-differentiation (FOPID)%particle swarm optimization (PSO) algorithm
抽水蓄能机组运行在低水头空载工况易进入“S ”特性区域,进而引起机组频率大范围波动和运行不稳定。针对传统比例—积分—微分(PID)控制在低水头空载工况下不能较好地调节抽水蓄能机组频率波动的不足,基于全特性曲线对数曲线投影变换的水泵水轮机数学模型,提出了适用于抽水蓄能机组低水头空载工况运行的分数阶 PID(FOPID)调节系统模型,并运用粒子群优化算法优化 FOPID 控制参数,重点讨论了 FOPID 控制在低水头空载开机和空载频率扰动时的应用。仿真分析表明:相较于传统 PID 控制,FOPID 控制使得低水头空载运行时机组频率和导叶开度的过渡过程有了明显的改进,提高了抽水蓄能机组调节系统的速动性与稳定性。
抽水蓄能機組運行在低水頭空載工況易進入“S ”特性區域,進而引起機組頻率大範圍波動和運行不穩定。針對傳統比例—積分—微分(PID)控製在低水頭空載工況下不能較好地調節抽水蓄能機組頻率波動的不足,基于全特性麯線對數麯線投影變換的水泵水輪機數學模型,提齣瞭適用于抽水蓄能機組低水頭空載工況運行的分數階 PID(FOPID)調節繫統模型,併運用粒子群優化算法優化 FOPID 控製參數,重點討論瞭 FOPID 控製在低水頭空載開機和空載頻率擾動時的應用。倣真分析錶明:相較于傳統 PID 控製,FOPID 控製使得低水頭空載運行時機組頻率和導葉開度的過渡過程有瞭明顯的改進,提高瞭抽水蓄能機組調節繫統的速動性與穩定性。
추수축능궤조운행재저수두공재공황역진입“S ”특성구역,진이인기궤조빈솔대범위파동화운행불은정。침대전통비례—적분—미분(PID)공제재저수두공재공황하불능교호지조절추수축능궤조빈솔파동적불족,기우전특성곡선대수곡선투영변환적수빙수륜궤수학모형,제출료괄용우추수축능궤조저수두공재공황운행적분수계 PID(FOPID)조절계통모형,병운용입자군우화산법우화 FOPID 공제삼수,중점토론료 FOPID 공제재저수두공재개궤화공재빈솔우동시적응용。방진분석표명:상교우전통 PID 공제,FOPID 공제사득저수두공재운행시궤조빈솔화도협개도적과도과정유료명현적개진,제고료추수축능궤조조절계통적속동성여은정성。
Under low water head and no-load conditions,the pumped storage unit is apt to fall into the“S"feature area which can lead to wide range of unit frequency fluctuations and unstable operation.As traditional proportion-integration-differentiation (PID) control under low water head and no-load conditions is unable to appropriately adj ust the frequency fluctuation problem, a fractional order PID(FOPID)regulation and control model is proposed for the pumped storage unit,where the pump turbine mathematical model is developed based on the complete characteristic curves by using logarithmic proj ection transformation, and the regulation parameters of FOPID are optimized by particle swarm optimization (PSO) algorithm.This paper is mainly concerned with the application of FOPID control for two simulated experiments,including unloaded start-up operation and unloaded frequency perturbation condition under low water.Simulation analysis demonstrates that FOPID control is capable of significantly improving the transition process of the frequency of pumped storage unit and guide vane opening.Meanwhile,the FOPID control will enhance the dynamic performance and stability of the pumped storage unit governing systems.