Lecture 5 Generation control and frequency regulation Dr.Qi Huang School of Energy Science and Engineering UESTC
Lecture 5 Generation control and frequency regulation Dr. Qi Huang School of Energy Science and Engineering UESTC
Contents Introduction ■Mathematical model Generator model Load model Prime mover model ▣ Governor model a Tie-line model ■Automatic Generation Control(AGC:自动发电 控制) 电力拿镜广城洲量写控制四川省重点实验蜜 家电
电力系统广域测量与控制四川省重点实验室 Contents Introduction Mathematical model Generator model Load model Prime mover model Governor model Tie-line model Automatic Generation Control (AGC:自动发电 控制)
Introduction-frequency characteristics of power system 1)the rotation speed of an interconnected generator has a relationship between the system frequency: pn f= 60 Where:P-no.of pole of the generator n-revolution per minite (r/min fsystem frequency (Hz) It is clear that the frequency control is actually the regulation of the rotation speed of generator 电力拿镜广城洲量写控制四川省童点实验蜜 家电网
电力系统广域测量与控制四川省重点实验室 Introduction-frequency characteristics of power system 1）the rotation speed of an interconnected generator has a relationship between the system frequency: Where: P——no. of pole of the generator n ——revolution per minite（r/min） f——system frequency（Hz） It is clear that the frequency control is actually the regulation of the rotation speed of generator 60 pn f
Introduction-frequency characteristics of power system 2)frequency of whole system is the same 3)balance between generation and supply at any time ■ 4)when load increases,the generation is less than the load,then the rotation speed decrease,leading to decrease of system frequency. 6)frequency regulation must be coordinated,not allowing generators acting alone. ■ 7)frequency regulation has relationship with operation cost. ■ 8)Try to dispatch the generation to generators economically 电力拿镜广城洲量写控制四川省重点实验蜜 国家电网
电力系统广域测量与控制四川省重点实验室 2) frequency of whole system is the same 3)balance between generation and supply at any time 4)when load increases, the generation is less than the load, then the rotation speed decrease, leading to decrease of system frequency. 6)frequency regulation must be coordinated, not allowing generators acting alone. 7)frequency regulation has relationship with operation cost. 8)Try to dispatch the generation to generators economically Introduction-frequency characteristics of power system
Introduction-load and frequency 20 variation Actual load profile 10 15 20 time of the day (hours) 50.5 50 49.5 Measured frequency variation curve 48.5 48 8日”月月器号用8888天昌88除日日日88过8且8温88g 院广城测量与控制四川省重点实验蜜 家电
电力系统广域测量与控制四川省重点实验室 Introduction-load and frequency variation Actual load profile Measured frequency variation curve