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Pressure Transmitter Used in Speed Generating System and Automatic Control at Hydropower Station

Pressure Transmitter Used in Speed Generating System and Automatic Control at Hydropower Station

1.Background

Due to long service and poor automatic control of the old hydropower stations, the governor system for regulating the power output and rotate speed of hydroturbine generating set fails to work frequently, which seriously affects the normal operation of the hydroturbine and daily power generation.

As the operating system of the governor system, oil hydraulic system affects the regulating of the hydroturbine directly based on its normality and reliability of its operating pressure.

2.Main Problems

In an old hydropower station, the governor of hydroturbine is mechanical hydraulic type and its oil hydraulic system is the power source for operating on-off service and automatic speed regulation of hydroturbine set. Generally, the governor with great shift of the oil pressure, frequent action, and simple designed automatic system and short of protection, brings various unsafe factors to the unit operation:

Common Failures:

1) The small contact capacity of electric contact pressure gauge brings its frequent starting-up, then singeing easily occurs and causes bad contact and unreliable action.

2) No well-equipped man-machine interface contacting with PC for transferring significant signals and switching values, failure signals of governor for example.

3) Imbalance of equipment utilization that the main pump operates while the spare one stands by for long time. The spare one cannot be checked which make it lose efficiency easily once emergency occurred.

4) Incomplete protection system. Old electric design, poor quality and function of pressure elements cannot ensure start or stop system automatically after long time use.

3. Solutions

(1). MPM484ZL pressure transmitting controller helps eliminating the possibility of main failures occurred in the old governor and accelerates the improvement of automatic control system in original governor oil hydraulic device. It can be widely applied in governor system of hydropower stations.

(2). MPM4881 pressure transmitting controller is designed based on our rich experiences in product design and application in hydropower industry. With the reliability guaranteed, it solves the problems in installation, wiring and commissioning, etc.

Besides standard pressure transmitting controller, we are able to offer customers with complete pressure monitoring and sensing solutions based on pressure transmitter according to your unique requirements.

4. Advantages

1) Reliability Assurance.

2) Real-time Display and Monitor

3) Complete Systematic Protection

4) Optimized installation

The pressure transmitting controller are suitable for governor system and helps to develop the self-protection and automatic operation of hydropower station.

It can be used to other equipment and auxiliary systems like control of water supply pipeline, compressed air system and inlet main valve control system and so on, assisting to solve the problems of the original control systems, much applicable for industry.

We have offered pressure solutions in oil hydraulic system of hydropower stations to many customers all around the world. If you have any requirements in pressure measuring and sensing, feel free to contact us via sales@microsensor.cn.

Details

  • Xi'an, Shaanxi, China
  • Micro Sensor Co,. Ltd