电力专业英语PPT课件

National level 国调 Branch-grid level 网调 Provincial level 省调
Regional level 地调 County level 县调
2020/9/25
HUI REN @ NCEPU
45-17
National wide grid dispatching Inter-regional connection above 500 Kv
500 Kv substation 500(330)Kv transmission lines 220 Kv key substation 220 Kv transmission lines
220 Kv substation 110Kv, 35 Kv substation 110Kv transmission lines and below
电力专业英语
45-1
Power System Introduction
Power dispatching
电力系统调度
voltage
current
active power
reactive power
status of circuit breakers
Status of protective relays ……
ΔΔ ~~
HUI REN @ NCEPU
Y
Y0 Δ
~
Y
Y0 Δ
~
Y0 Δ
~
Y0 Δ
~
~
45-9
Basics
• Generator • Power Transformer • Circuit breaker • Protective Relay •… • Dispatching system
2020/9/25
HUI REN @ NCEPU
45-7
Basics
• DC/AC 直流/交流 • Voltage 电压 • Voltage level 电压等级
▪ 110v, 220v, 380v, ▪ 3kV, 6kV, 10kV, 20kV, 35kV ▪ 110kV, 220kV, 330kV, 500kV, 750kV, 1100kV
• Phase voltage 相电压, line voltage 线电压 • Active power（real power）有功功率 • Reactive power 无功功率
2020/9/25
HUI REN @ NCEPU
45-8
~
2020/9/25
Basics
Y0 Y
Δ
Y0 Y
Δ
Y0 Y0
2020/9/25
HUI REN @ NCEPU
45-19
• EMS includes the following power advanced software: Load Forecasting(负荷预测), Automated Generation Control(自动发电控制), State Estimation(状态估计), Transient Stability Analysis(暂态稳定分析), Optimal Power Flow(最优潮流), Dispatcher Training Simulator(调度员培训仿真系统)…
HUI REN @ NCEPU
45-10
2020/9/25
HUI REN @ NCEPU
45-11
2020/9/25
HUI REN @ NCEPU
45-12
2020/9/25
HUI REN @ NCEPU
45-13
2020/9/25
HUI REN @ NCEPU
45-14
2020/9/25
• The basics of these advanced software is SCADA
system.
2020/9/25
HUI REN @ NCEPU
45-20
• The generator voltages are in the range of 11 to 30kV; higher generator voltages are difficult to obtain because of insulation problems in the narrow confines of the generator stator.
2020/9/25
HUI REN @ NCEPU
45-2
2020/9/25
HUI REN @ NCEPU
45-3
2020/9/25
HUI REN @ NCEPU
45-4
2020/9/25
HUI REN @ NCEPU
45-5
2020/9/25
HUI REN @ NCEPU
45-6
2020/9/25
HUI REN @ NCEPU
4Байду номын сангаас-15
2020/9/25
HUI REN @ NCEPU
45-16
Power Dispatching
• Dispatching regulation on power system: issued in 1993 by State Council.
• Unified dispatching and hierarchical management: five levels.
Medium and small scale plants
Distribution center High voltage customers
45-18
• Power dispatching automation system(调度自 动化系统). The task is providing to operators(调度员) all various kinds of real time information of power system, making
2020/9/25
National level Branch-grid level Provincial level
regional level County level
HUI REN @ NCEPU
Operation management of related large-scaled plants Coordinate economic operation of various branch grids Large-scaled plants
management and dispatching decision to
ensure safety and economical operation of
power system. Sometimes it is also called EMS (Energy Management System)(能量管理 系统)