GB/T 32894-2016 in English

1. Background and significance of the standard

This standard specifies the criteria, methods, conditions and processes for the operating conditions and operating condition conversion of pumped storage units, and is applicable to reversible pumped storage units with a single unit capacity of 150MW and above. The standard is proposed and managed by the China Electricity Council, and provides an important technical basis for ensuring the safe and efficient operation of pumped storage units.

2. Definition and classification of operating conditions

According to GB/T32894-2016, the operating conditions of pumped storage units include:

• Generation condition (G)
• Pumping condition (P)
• Generation phase adjustment condition (GC)
• Pumping phase adjustment condition (PC)
• Spinning reserve (SR)
• Transfer shutdown (TS)

3. Conditions and process of operating condition conversion

The operating condition conversion must meet the following basic conditions:

• The corresponding upstream side gates of the unit are fully open
• The water levels of the upper and lower reservoirs are within the normal operating range
• The unit's export bus switchgear is in "remote" control mode
• No fault alarm

Typical conversion process:

1. Shutdown condition (ST) → Transfer shutdown (TS)
2. Transfer shutdown (TS) → Spinning Standby (SR)
3. Spinning Standby (SR) → Generation Condition (G)

4. Special requirements for operating condition conversion

Pay special attention to the following matters during the operating condition conversion:

• The priority of the accident shutdown process is higher than the normal shutdown process
• When it comes to the operation of circuit breakers and disconnectors, the "five prevention" requirements must be met
• Logical locking conditions to prevent accidental mechanical braking

5. Implementation Suggestions

To ensure the safety and reliability of operating condition conversion, it is recommended to:

• Regularly inspect and maintain the unit auxiliary equipment
• Optimize the operating condition conversion logic and improve the level of automation
• Strengthen the training of operating personnel and familiarize them with the switching procedures of various working conditions