Category： Governor of large-capacity turbine

Product name： Governor of impulse turbine

Main characteristics

1. Intelligent PID control with variable parameters and variable structure makes the turbine stably operate in different operating conditions.
2. Digital co-linking new technology makes the generator set keep high-efficiency and operate with little vibration.
3. Adopt electro-hydraulic proportional servo technology with high control accuracy
4. Realize single-nozzle/multi-nozzle activating and operation, intelligent non-disturbance switching.
5. High-reliable flow deflector operation device
6. On-line self-diagnosis and troubleshooting
7. Design of high electromagnetic interference resistance
8. Realize communication with the host computer by means of the special communication interface.

Patent technology

Electro-hydraulic proportional follower of hydro turbine governor (Patent No. 95 2 38033.1)
Main configuration
Electrical cubicle: Adopt PLC/PCC as controller with color touch screen and digit feedback
Mechanical cabinet: Electro-hydraulic proportional servo valve, high-reliable main distributing valve and digital flow deflector control module.

 

Category： Governor of large-capacity turbine

Product name： Governor of Francis turbine

Product description：

Main characteristics

Mechanical cabinet 1: Electro-hydraulic proportional servo valve

1. Adopt electro-hydraulic proportional servo technology with high control accuracy and excellent adjusting quality.
2. Adopt electric-manual operation with smooth and reliable operation without creeping of servomotor
3. Non-condition and non-disturbance switching between automatic mode and electric-manual mode of electro-hydraulic proportional valve can easily be realized.  
4. Auxiliary servomotor is controlled by hydraulic input and hydraulic feedback. So no rod between electro-hydraulic inverting component and main distributing valve is needed, which is in favor of simplifying the structure.
5. Cancel the mechanical feedback.
6. Except main distributing valve, other components are all standard hydraulic elements, which is convenient for adopting hydraulic integration and raising operation oil pressure. 

Mechanical cabinet 1: AC servo motor and stepping motor

1. Automatic-centering large power stepping motor inverter，the stepping motor has small moment of inertia and output torque,is highly reliable without jamming or oil.
2. The rotation movement of the motor is transformed into rectilinear movement with the ball screw pair, which is characterized by small starting moment, fine inching at low speed and accurate motion transmission.
3. Manual/automatic switching without condition or disturbance
4. Centering is executed with a spring that has no dead stroke in the reciprocating motion with accurate and only center point.
5. Cancel mechanical feedback.
6. Mechanical displacement output of the electric-mechanical inverter directly drives the pilot valve of the main distributing valve without rod or oil pipe with simple structure. 
 

Electrical cubicle

1.  On-line test function, test parameters and pictures are displayed timely.
2. The adjusting function of the control structure self-adapting and parameter self-adjusting with the on-line specialist system.
3.  Frequency adjusting mode, power adjusting mode and opening adjusting mode, which can automatically be selected according to different operation conditions.
4.  The function of adjusting the opening of the guide blade according to the frequency change rate of the power network.
5. LCD touch screen adopts WINDOWS interface to realize the fault oscilloscope and test functions.
6.  Guaranteeing the hydro turbine generator set be swiftly started, shut down, synchronize and close as well as increase and decrease load.
7. Guaranteeing the hydro turbine generator set stably operates in the operating conditions such as zero load, generating, phase modulation, stopping and manual.
8.  Guaranteeing manual/automatic switching be realized without impact.
9. Guaranteeing the frequency of the generator set automatically trace the system frequency according to the preset frequency when it operates in zero load. 
10.  Starting opening, zero-load opening and bad operating condition limit area can be modified at real time according to water head. Dynamic sensitivity of speed modulating system can automatically be modified according to the operating conditions and it is adaptable for the different requirements of various operating conditions.
11. Guaranteeing automatically compensate mechanical zero-point offset and send indication.
12. The electric opening limit, which can be adjusted by operator at real time.
13. On-line real time correction function of manual failure area (ε) and modulating coefficient and guaranteeing that load has no disturbance.
14.  Double functions of local control and host computer control and guaranteeing that control loads are switched without disturbance.
15. The functions of adjusting the frequency once can meet the electrical network’s requirements of frequency-adjusting operation for governors.
16.  The intelligent identification and control of small network and isolated network operation.
 

tent technology

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Product name： Governor of Kaplan turbine

 Product description：

Main characteristics
Mechanical cabinet 1: Electro-hydraulic proportional servo valve
1. Adopt electro-hydraulic proportional servo technology with high control accuracy and excellent adjusting quality.
2. Adopt electric-manual operation with smooth and reliable operation without creeping of servomotor
3. Non-condition and non-disturbance switching between automatic mode and electric-manual mode of electro-hydraulic proportional valve can easily be realized.  
4. Auxiliary servomotor is controlled by hydraulic input and hydraulic feedback. So no rod between electro-hydraulic inverting component and main distributing valve is needed, which is in favor of simplifying the structure.
5. Cancel the mechanical feedback.
6. Except main distributing valve, other components are all standard hydraulic elements, which is convenient for adopting hydraulic integration and raising operation oil pressure. 

 

 

（The software adopts timely variable parameters-controlled strategy with high reliability and good stability, which can identify the working conditions such as zero load, grid connected and isolated operating. The operating mode of Gear Panel Frequency measuring or Remain-voltage Frequency measuring can realize the swiftly grid-connected function. It will be very convenient to read data and modify parameters by friendly Man-machine interface. The Electrical cubicle can realize the communication with PC according to certain Communication Rules.）

Electrical cubicle
1. On-line test function, test parameters and pictures are displayed timely.
2. The adjusting function of the control structure self-adapting and parameter self-adjusting with the on-line specialist system.
3.  Frequency adjusting mode, power adjusting mode and opening adjusting mode, which can automatically be selected according to different operation conditions.
4. The function of adjusting the opening of the guide blade according to the frequency change rate of the power network.
5. LCD touch screen adopts WINDOWS interface to realize the fault oscilloscope and test functions.
6.  Guaranteeing the hydro turbine generator set be swiftly started, shut down, synchronize and close as well as increase and decrease load.
7. Guaranteeing the hydro turbine generator set stably operates in the operating conditions such as zero load, generating, phase modulation, stopping and manual.
8. Guaranteeing manual/automatic switching be realized without impact.
9.  Guaranteeing the frequency of the generator set automatically trace the system frequency according to the preset frequency when it operates in zero load. 
10. Starting opening, zero-load opening and bad operating condition limit area can be modified at real time according to water head. Dynamic sensitivity of speed modulating system can automatically be modified according to the operating conditions and it is adaptable for the different requirements of various operating conditions.
11.  Guaranteeing automatically compensate mechanical zero-point offset and send indication.
12. The electric opening limit, which can be adjusted by operator at real time.
13. On-line real time correction function of manual failure area (ε) and modulating coefficient and guaranteeing that load has no disturbance.
14. Double functions of local control and host computer control and guaranteeing that control loads are switched without disturbance.
15. The functions of adjusting the frequency once can meet the electrical network’s requirements of frequency-adjusting operation for governors.
16.  The intelligent identification and control of small network and isolated network operation.
 

Elctrical cubicle: Adopt PLC/PCC as controller with color touch screen and digit feedback
Mechanical cabinet: Electro-hydraulic proportional servo valve/AC servo motor, high-reliable main distributing valve 

 

Standarded Mechanical and Electric Combined Cabinet

The cabinet can be designed into Electrical-mechanical separation type or Electrical-mechanical integration type according to the  field setting request.(Applicable for either single-regulation or Dual-regulation)  Nominal diameter of Main Distributing Valve:80/100/150/200mm  Working Oil Pressure: 2.5MPa/4.0MPa/6.3M

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Product name： Governor of bulb turbine

Product description：

GLT series governor of bulb turbine is a new-generation governor developed by our institute according to the characteristics of small rotary inertia, high specific speed and high Tw/Ta of bulb turbine, which has passed test (2002 JZ No.23).

Main characteristics
1. Intelligent PID control with variable parameters and variable structure makes the turbine stably operate in different operating conditions.
2. New technology of digital co-linking makes the turbine keep high-efficiency and work with little vibration.
3. Adopt electro-hydraulic proportional servo technology and AC servo-motor control technology with high control accuracy
4. Equipped with the subsection shutting-off device to relieve over-high water hammer pressure and prevent occurrence of surge.
5. Reliable mechanical runaway-proof measures to guarantee safe operation of the generator set.
6. On-line self-diagnosis and troubleshooting.
7. Design of high electromagnetic interference resistance.
8. Realize communication with the host computer by means of the special communication interface

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Category： Governor of medium-small turbine

Product name： Medium- small governor of normal oil pressure

Product description：

Main characteristics

1. Operation oil pressure is 2.5/4.0/6.3MPa.
2. Electro-hydraulic proportional value or digital valve structure with simple operation and reliable workability.
3. Equipped with special digital communication interfaces.
4. Appearance, structure and arrangement mode are same as that of the traditional governor so it is convenient for upgrading of the existing equipments.
5. Work of operation includes: YWT600/1000/1800/3000/5000/7500kg-m

Patent technology
Electro-hydraulic proportional following device of turbine governor  

Main configuration
Electric part adopts PLC/PCC as controller with Chinese character touch screen.
Mechanical part adopts electro-hydraulic proportional value or digital value structure.