Thread Content
Commissioning Procedures for the Digital Control Panel of the Rectifier Unit I. Commissioning Preparation: 1. Write the PLC program in accordance with the requirements of the protocol. 2. Prepare debugging tools: one set of oscilloscopes, two multimeters (one 9807 and one 9802), and one laptop (with a programming cable). 3. One set of wires for debugging. One set of drawings. One copy each of the debugging records and the debugging procedures. (Note: The control panel number should first be determined based on what number has been assigned so far. Fill in again. ) 4. Prepare the required fuse cores (as specified in the material list), relays, and chips. II. Debugging: 1. Connect the wires properly. Install the fuse core, relay, and chip. Check whether the wiring is correct. Especially high-voltage power supplies. 2. Measure whether the incoming line voltages U, V, and W are normal. And make a record of it. 3. Measure the power supply of the amplifier (including both no-load and loaded conditions), the protection power supply (24V board), as well as other power supplies, and record the values. Note: If TR1 and TR2 are from two different groups, connect them to the other group and repeat step 3. 4. After the power supply is normal, connect the internal power supply. Check whether the operator is working properly and record it. Version refers to the version number of the chip. 5. Measure the power supply of the thermal standby controller and record it. U21-1/3 refers to the input and output voltages of U21. 6. Measure the power supply of the trigger controller and keep a record. 7. Measure the operation of the optocoupler and make a record. (R41-P1 H/L, where H refers to the voltage of R41 when no 24V power supply is applied. L refers to the voltage of R41 when a 24V power supply is applied. ) 8. Check whether the output and returned pulses are normal. And make a record of it. During recording, note the voltage value when there is no pulse before “/”. “/”The amplitude of the pulse is recorded later when there is a pulse. 9. DC feedback zeroing: Set ILC_ to 4095. Short-circuit the DC feedback. Wait for about 10 minutes. Check what the DC feedback value is showing at this time. Then set the DC feedback zeroing coefficient (OdCA) to 3 times the displayed value. And make a record of it. 10. Setting of the DC feedback coefficient: For DC operation, connect a 5V power supply to IF2 and SOV, and insert a potentiometer in series. Use a multimeter model 9807 (set to the 20V range) to measure the potential UF between IF2 and SOV; this value is usually set around 4.1V. Using the display value I1 on the controller, calculate: K1 = UF × 4095 / 5 = , and K2 = K1 × 21845 / I1 = . (Note: 21845 is the decimal value of the default value 5555 for CFK(KdCA); if CFK(KdCA) is not 5555, convert it to its decimal value accordingly for calculation. K2 represents the set value of CFK(KdCA).) Then check the linearity and record it. 11. Communication: Connect a 0.5V power supply to IF1 and SOV, and insert a potentiometer in series; adjust the potentiometer so that the value displayed on the operator for I1 is around 10.00. Use a multimeter model 9807 to measure the potential UF1 between IF1 and SOV, where UF1 = V ； Adjust the potentiometer again so that the value displayed on the operator is around 40.00 for I2; then measure the potential UF2 between IF1 and SOV, calculated as follows: K1 = (UF2 – UF1) × 4095 / 0.5 = , and K2 = K1 × 46812 / (I2 – I1) = . Note: 46812 is the decimal value of KACA’s default value b6dc; if KACA is not b6dc, convert it to its decimal value accordingly for calculation. Converting K2 to hexadecimal gives the value set for KACA. Then check the linearity and record it. 12. AC zero adjustment: Adjust the potentiometer so that the value displayed on the operator is around I3: 40.00; then measure the potential UF between IF1 and SOV, where UF = V ； It is calculated as follows: I4 = UF*4095/0.5, K = I3 - I4 *3 + 256. K is the set value for oACA (AC zeroing value). 13. Zero the control angle. Connect the zeroing control circuit. When the zeroing operator’s power is connected to U and V, the pulse detected is M2 or M5. Set the given one to a control angle of 60 and switch it to manual mode. Check whether the displays on the operator and the zeroing operator are consistent; if not, adjust the parameter ATPY. (The default value for ATPY is 240; it is generally adjusted between 230 and 240). If the readings on the operator and the zeroing operator differ significantly, the hour value should be adjusted first, followed by adjusting ATPY. And make a record of it. 14. Channel switching: Record the voltage (measurement feedback value), current, and control angle before the switch. Voltage (measured feedback value), current, and control angle after switching. Try several times and keep a record. 15. Feedback switching: Observe the changes in AC/DC feedback switching. And make a record of it. 16. Feedback loss experiment during normal operation: observe the changes. (Note: The control angle must be less than 70 degrees and the current must be greater than 10% of the range to conduct this experiment.). III. Write to the PLC for relay protection testing. And keep a record of it. IV. Record the parameters.