9.1 Operation and maintenance preparation
When performing routine maintenance on site, ensure that the system is in Shutdown mode. The following are instructions for mode switching operations. For details, see 8.3.1 Energy Storage Control.
In General mode, change Control Mode Switch from constant AC Power Mode to Stop.
In Separate mode, change the control mode of System 1#~6# from Constant AC power mode to Stop mode.
Disconnect the QFBK circuit breakers on the door of the primary distribution box, and finally turn the highvoltage unit circuit breakers in all battery branches to the horizontal position, as shown in the following figure.
Note: The circuit breaker handle label (switch) does not rotate with the handle.
NOTICE
To ensure the safety of personnel in the maintenance process, please complete the above operations before starting the operation and maintenance work. It is forbidden to skip the above operations and start the operation and maintenance work.
9.2. Operation and Maintenance Rules
The scope of operation and maintenance includes all equipment and accessories involved in the whole energy storage product, including but not limited to main equipment, electrical, automatic control, monitoring, fire protection, lighting, civil engineering, lightning protection, etc.
Operational monitoring (remotely or on site)
No. | Item | Content | Period |
|---|---|---|---|
1 | Working status | Charge/discharge/standby/sleep | Day |
2 | Active power | Charge/discharge power value | Day |
3 | Reactive power | The system reactive power output value | Day |
4 | Power factor | Grid side power factor value | Day |
5 | Grid frequency | Grid side frequency | Day |
6 | AC voltage | Grid side A, B, C three-phase voltage | Day |
7 | AC current | Three-phase currents on the grid side A, B and C | Day |
8 | DC voltage | DC bus voltage | Day |
9 | DC current | DC bus current | Day |
10 | Cell voltage | All cell voltages of the system (including the highest and lowest voltages and their corresponding unit numbers) | Day |
No. | Item | Content | Period |
|---|---|---|---|
11 | Battery temperature | All battery packs of the system, pole temperatures (including the highest and lowest temperatures and their corresponding battery packs, pole numbers). | Day |
12 | SOC | System SOC and SOC for each string of batteries | Day |
13 | Communication | The communication status between the system dispatch control terminal, the conversion, the battery management system, and the environmental control system | Day |
14 | Alarm | AC frequency, phase sequence abnormality, DC side battery overvoltage/undervoltage, overcurrent, short circuit, over-temperature, and other status of alarm | Day |
15 | Fault | System dispatch control terminal, PCS, battery management system, air conditioning, fan, and other equipment failure status | Day |
On-site inspection
No. | Item | Requirements/ Standards | Period |
|---|---|---|---|
1 | Containers and surroundings | The appearance of the container should be deformed and damaged without external forces, and the foundation should be free of subsidence | Quarter |
2 | conversion (PCS) | The indicator light and display should be displayed correctly, and the sound and temperature are normal during operation | Quarter |
3 | BESS control box | The indicators and display should be displayed correctly, and the terminals should be securely connected | Quarter |
4 | Battery rack | Rack indicators should be displayed normally, the high-voltage connectors should be securely connected, and communication connectors should be securely connected | Quarter |
5 | Battery Management System (BMS) | Acquisition, communication cables should be intact; and connector should be securely connected | Quarter |
6 | Network switch | The indicator light shows that the network port is securely connected | Quarter |
7 | System communication | All devices of the system communicate properly, and there is no offline | Quarter |
8 | Precision air conditioning | Air conditioning start/off OK; | Quarter |
9 | Fan | The fan should be switched on/off normally; no noise when running | Quarter |
10 | Duct | The duct should be free of foreign objects and kept unblocked | Quarter |
11 | Primary circuit | Each connection point should be secure and reliable, and free of looseness | Half |
12 | Secondary circuit | Each signal side connector, the terminal row should be securely connected, with no loose | Quarter |
13 | Temperature and humidity sensor | The data deviation is within the normal range | Quarter |
14 | Earthing | The grounding connection is reliable | Half |
9.3. Regular operation and maintenance work
9.3.1. Electrochemical energy storage power station
Monitoring, regulating and inspecting the running state of electrochemical energy storage power station.
Operation and parameter adjustment of energy storage products in electrochemical energy storage power stations.
Operation record of energy storage products in electrochemical energy storage power station.
Data backup, statistics, analysis and reporting of electrochemical energy storage power station.
Work ticket, operation ticket, shift handover, patrol inspection, regular test of equipment and implementation of rotation system.
Original records, drawings and data management of energy storage products in electrochemical energy storage power station.
Inspection, maintenance and management of building construction and assisted living facilities in electrochemical energy storage power station.
Formulate countermeasures to prevent safety accidents of electrochemical energy storage power stations.
Daily operation of electrochemical energy storage plant equipment.
9.3.2. Energy Storage Devices
Cleaning of energy storage converters, battery systems and battery management systems, wiring inspection, battery charging and discharging, etc.
During maintenance of energy storage equipment, safety protection measures should be taken for the equipment and other related operating equipment to prevent accidental collision.
Maintenance personnel are professionally trained, equipped with protective equipment, take protective measures, and use qualified insulation tools.
Maintenance types can be divided into routine maintenance, regular maintenance and special maintenance:
1) Daily maintenance: temporary fault removal, including the process of inspection, cleaning, adjustment and replacement of parts, there is no fixed period of time, the completed maintenance and overhaul items should be recorded in the maintenance record, and management archives;
2) Regular maintenance: carry out comprehensive inspection, cleaning, testing, measurement and inspection of related equipment on a regular basis. The regular maintenance period is generally half a year or one year, and the period can be adjusted according to the actual situation; The regular maintenance items shall be carried out item by item. The completed maintenance and overhaul items shall be recorded in the maintenance records and managed and filed.
3) Special maintenance: maintenance of related equipment due to special requirements;
9.4. Fault Manual
Faults may include:
No. | The fault status | Troubleshooting |
|---|---|---|
1 | The PCS is running too noisy | Check to make sure the conversion power is within the permissible range, observe whether the voltage and current of the power network fluctuate, and check to replace the cooling fan. |
2 | Black screen | Check to make sure that the 24V power connector on the back of the touch screen is secure and does not loosen. |
3 | Communication failure of touch screen | Check the touch screen communication line and check that the main console is powered on. |
4 | The cell overvoltage | Check that the battery's overvoltage performance is correct and that the corresponding BMU/BMS circuit board is OK. |
5 | The battery or pole overtemperature | Check that the fan is on normally, check that the poles are loose, and check that the battery is insulated to the ground. |
6 | Overcurrent protection action | Check for short circuits. |
7 | Fuse protection | The output of the device exceeds the current limit and needs to check for short circuits and replace the quick fuse. |