Table 5 Protection measure optimization decision parameters.

From: Deep recurrent neural networks for water hammer transient prediction and dynamic protection optimization in long distance pipelines

Protection type

Decision variable

Value range

Response time

Protection effect

Operation cost

Valve closure

Closure time curve

10–300 s

Immediate

High

Low

Surge tank activation

Connection timing

Binary (0/1)

1–3 s

Medium-High

Very Low

Relief valve opening

Opening degree

0-100%

< 1 s

High

Medium

Pump speed control

Speed reduction rate

0-100% rated

2–5 s

Medium

Medium-High

Air valve action

Admission/release rate

Variable

< 0.5 s

Medium

Low

Bypass valve

Opening sequence

Time-staged

1–2 s

Medium

Low-Medium