| Type: Control Box |
Sphere of application
1Application
1) Fit for each type of synchronous generator set with the capacity less than 300MW
Excitation system of turbo generator set
Excitation system of hydraulic generator set
2) Fit for new and rebuilding stations with a variety of excitation modes
Self-parallel excitation system
Static excitation system
Compound excitation system
Excitation system with DC excitation machine
Excitation system with AC excitation machine
Brushless excitation system
3) Fit for various types of synchronous electromotor excitation system
2Application environment
1) Elevation: d4500m
2) Ambient temperature: -20~45
3) Relative humidity is not more than 90%
4) There's no bombing or supporting combustion medium surrounded, and no corrosive gas and conducting dust on air.
5) No strenuous vibration, hard concussion and welter.
6) Specific environment demand shall be decided through consultation.
Features:
(1) INTEL industry specific microprocessor, imported PLC and 2 controls with 32 bits compose to the embedded double microcomputer excitation system. Two sets of microcomputer work on-line as hot reserve each other. If the one goes wrong, the system transmits to the other one automatically without any interruption. The interval is less than 200us.
(2) Add analog channel in support. Analog channel separates from main control channel, adjust by the way of excitation current closed-loop control. It shall be run into operation,when there're something wrong with main control channel.
(3) Have the whole model of voltage control, current control, reactive control and power factor control, which can satisfy various operation mode demands with different power stations.
Voltage control: maintain invariableness of terminal voltage
Current control: maintain invariableness of excitation current
Reactive control: feedback reactive power and invariable reactive operation
Power factor control: maintain invariableness of power factor
(4) Apply to several complicated control ways, which have excitation system performance reach the excellence
PID (Proportional, Integral, Differential)
PSS (Power System Stabilizer)
LOEC (Linear Optimal Excitation Control)
NOEC (Nonlinear Optimal Excitation Control)
(5) Provide intact output interface, in order to connect with all control equipments in power station.
Routine interface: provide standard output and input interface as power system rule.
Communication interface: including communicates ways of RS232 and RS485. It can communicate with intelligent devices of intergraded automation of power station directly.
(6) Interactive operation interface ( fool type) and intuitionistic HMI
Main functions:
(1) Limit of maximum excitation current value and strong excitation inverse time-limit
(2) Low excitation limit and the function of loss excitation protection
(3) PSS limit
(4) Software phase-shifting and difference-regulation
(5) Voltage of automatic tracking system
(6) Device fan stopping,excitation loop fusing and current limit of partly resecting
(7) Monitor and protection of power PT break
(8) Modify parameter on-line and show parameter real-time
(9) Real-time data wave record
(10) Device self-diagnostic and renew
(11) Automatic tracking and shift of double microcomputer
Technique parameter
(1) Input channel of analog signals: 8 channel
(2) Resolution of input parameter of analog signals:210
(3) Adjust range of manual/auto : (10~130)% (rating)
(4) Start excitationOvershoot is less than 1% rating, time of start excitation is less than 2.5 seconds, times of shaking is less than 1 times.
(5) Rate of adjusting differenceSoft reactive adjusting difference is more than �15%
(6) Precision of voltage regulating: more than 0.5%
(7) Silicon-controlled control angle resolution1/4096
(8) Rang of silicon-controlled shifting phase5~165 (three-phase full control bridge)
(9) Frequency characteristic: less than 0.1%
(10) Reflection time of voltage: ascend is less than 0.08S upwards; decline is less than 0.15S
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Microcomputer Excitation Device
