Pressure Transmitter Application In Oil Hydraulic System of Hydropower Station

Pressure Transmitter Application In Oil Hydraulic System of Hydropower Station

1 Background Description:

The governor system works to adjust the power output and rotation rate of water turbine engine unit. While oil hydraulic system is the operation system of governor system in hydropower station. The stability and reliability have an important influence in normal operation of the water turbine.

2. Problem existed:

There is a problem existed in one hydropower station which has established for a long time. The open, close, and automation rotation adjustment of the water turbine are powered by the oil hydraulic system. Great changes of the governor oil pressure and over frequent actions brings a lot of safety issues:

（1）The Pressure gauge in use with small contract capacity leads to sparks frequently when turn up and poor contact.

（2）Lack of good man-machine interface leads to incapability of outer communication. Important input and switch signal like main default signal of governor cannot be connected.

（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 situation occurred.

（4）Imperfect protection system. Old electric design, incomplete function and low quality pressure element cannot operated well to open or stop automatically after long time use.

3. Solutions We Provide:

(1) Products Involved

MPM4881 pressure transmitting controller

This product helps to solve problems in installation, wiring and adjustment in governor system of hydropower station.

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

(2) Problems we solved

A: Reliability assured.

Our product are designed with relay construction and good load ability. Customers can set appropriate return difference and adjust the action spot according to the operation oil pressure.

B: Real-time display and monitoring.

There are optional analog output signals to choose according to site needs which can communicate to LCU system, PLC and other secondary instrument for measurement and monitoring.

C: Better utilization of equipment

Based on the analog output signal and controller relay spot, the main and spare pump can operate alternatively. What’s more customers can adjust the spare pump with the help of MFK5081 flow switch as the flow annunciator.

D: Optional installation available

Our products are installed with removable installation joint, connector terminals and can be installed according to different needs. There are protection covers for water-proof, dust-proof as well as short-cut proof too.

The pressure transmitting controller are suitable to in 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.

4. Onsite Installation. Please see pictures attached

We have offered 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 or visit our website:www.microsensorcorp.com for more detail solutions.