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Microcomputer Excitation & Governor Systems
Microcomputer Excitation Systems
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(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 |
Technique parameters:
(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 excitation:Overshoot is less than 1% rating, time of start excitation is less than 2.5 seconds, times of shaking are less than 1 times.
(5) Rate of adjusting difference:Soft reactive adjusting difference is more than ±15%
(6) Precision of voltage regulating: more than 0.5%
(7) Silicon-controlled control angle resolution:1/4096
(8) Rang of silicon-controlled shifting phase:5~165 (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 |
Microcomputer Governor Systems
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(1) A completely new system design idea The speed regulator abandons the traditional design of single & double device system, learning from abroad noted speed regulator company to separate the single measuring, data disposal from control output completely, adopts multi-CPU distribution fault-tolerance system structure, which both enhance real-time adjustment level and ensure the reliable of device operation.
(2) 32 bits industrial microcomputer with high performance It's the first time in our nation to adopt imported 32 bits industrial microcomputer with high performance to compose the host computer system of speed regulator, which is advanced design, strong anti-jamming ability, excellent compatibility, easy to upgrade, and use the advanced flash storage operation program that is not only flexible and reliable to use but also easy to modify.
(3) Reliable hardware design Advanced industrial microcomputer system, standard hydraulic pressure subassembly and transducer module compose the reliable speed regulator hardware system, additionally, roundly fault tolerant design of signal and shift channel, which makes the speed regulator realize convenient, flexible, safe and reliable to monitor and control of hydraulic turbine. And it's convenient to operate and maintain.
(4) Advanced soft structure YWT series speed regulator builds soft structure of whole modularization, which enhances the programmed efficiency, and is simple and flexible to extend function.
(5) Excellent adjustment performance Technique of YWT series speed regulator completely meets the demand of latest nation standard; the main performance characteristic reached international advanced level. The speed regulator can operate under several modules, and is convenient for automation smoothing switchover between frequency adjustment, vane-opening adjustment and power adjustment; effectively realize power closed loop regulation with directly data given of supervisory control system upper machine,favorable to enhance integrated automation control level for whole factory. Under the isolated-network operation, the speed regulator has excellent adjustment performance, which ensures safety and stable operation through fair. |
Every product, equipment, service and whole-system will be specially designed and customized according to each customer's or project's requirements. If you need us to design a proposal for your project, please send us your specific requirements now, our sales engineers will contact you the soonest. |
Hydropower Turbines