1、 Items to be checked before startup:
1. Check whether the inlet gate valve is fully open;
2. Check whether all cooling water is fully opened;
3. Check whether the bearing lubricating oil level is normal;Shall be located;
4. Check whether the instrument network voltage and frequency parameters of the power distribution cabinet meet the startup and grid connection requirements.
2、 Operation steps for unit startup:
1. Start the turbine and slowly adjust the governor to make the turbine speed reach more than 90% of the rated speed;
2. Turn the excitation and power commutation switches to the on position;
3. Press the “build-up excitation” key to build the excitation voltage to 90% of the rated voltage;
4. Press the “excitation increase” / “excitation decrease” keys to adjust the generator terminal voltage and adjust the turbine opening adjustment frequency (50Hz range);
5. Press the energy storage button to store energy (this step is ignored for circuit breakers without energy storage function), and close the knife switch [Note: pay attention to
Check whether the circuit breaker has tripped and disconnected (the green light is on). If the red light is on, this operation is strictly prohibited];
6. Close the manual grid connection switch, and check whether the phase sequence is normal and whether there is phase loss or disconnection. If the three groups of indicator lights flicker at the same time, it indicates that
Normal;
(1) Automatic grid connection: when the three groups of lights reach the brightest and change slowly and go out at the same time, quickly press the closing button to connect to the grid
(2) Automatic grid connection: when the three groups of lights change slowly, the automatic grid connection device will be switched on, and the grid connection device will detect automatically. When the grid connection conditions are met, it will send
Command automatic closing and Net;
After successful grid connection, disconnect the manual grid connection switch and the automatic grid connection device switch.
7. Increase active power (adjust turbine opening) and reactive power (adjust according to “increase excitation” / “decrease excitation” under “constant voltage” mode
After adjusting to the proposed parameter value, 4. Check whether the knife switch, circuit breaker and transfer switches of the distribution cabinet are in phase
Switch to “constant cos ￠” mode for operation.
3、 Operation steps for unit shutdown:
1. Adjust the hydraulic turbine to reduce the active load, press the “excitation reduction” key to reduce the excitation current, so that the active power and reactive power are close to zero;
2. Press the trip button to trip the circuit breaker for disconnection;
3. Disconnect the excitation and power commutation switches;
4. Disconnect the knife switch;
5. Close the guide vane of the hydraulic turbine and stop the operation of the hydraulic generator by manual brake;
6. Close water inlet
Operating regulations for water turbine generator set gate valve and cooling water.
4、 Inspection items during normal operation of generator unit:
1. Check whether the outside of hydro generator unit is clean;
2. Check whether the vibration and sound of each part of the unit are normal;
3. Check whether the oil color, oil level and temperature of each bearing of hydro generator are normal; Oil ring yes
Whether it operates normally;
4. Check whether the cooling water of the unit is normal and whether there is blockage;
5. Check whether the instrument parameters, regulator operating parameters and indicator lights are normal;
6. Check whether each change-over switch is in the corresponding position;
7. Check whether the incoming and outgoing lines, switches and connecting parts of the generator are in good contact, and whether there are
No heating, scorching, discoloration, etc;
8. Check whether the oil temperature of the transformer is normal, and whether the drop switch is heated, scorched and variable
Color and other phenomena;
9. Fill in the operation records on time and accurately.
Post time: Jun-16-2022
