Wild fire solution
01
- Background and Challenges
02
- Technical Solutions
03
- Case Analysis
Background and Challenges
Issue One
- Frequent phenomenon of overhead lines crossing forests, prone to tree-line proximity causing arclight induction grounding. Such faults have very small current (mA level or 10A level), making it difficult for line protection to identify and trip. Long-term or repeated re-ignition of electric arcsisamajor cause of wildfires
Issue Two
- Outdoor forest environments present challenging installation conditions. Traditional switchgear is bulky and heavy, making transportation, handling, hoisting, and installation difficult. These challenges are particularly pronounced in complex terrains like mountains and jungles.
Technical Solutions
Preventing wildfires caused by power lines is essentially dealing with grounding faults. It is necessary to use intelligent equipment quickly detect and identify abnormalities in the early stage and take targeted fault tripping measures
- Accurate detection
- Good calculation methods
- Rapid Tripping
- key factors to solve issue 1
- less components
- easy to mount
- light weight
- key factors to solve issue 2
Detectable - High-precision sensor
The voltage & current sensor is deeply integrated with the breaker, replacing traditional electromagnetic PT.
- FRTU has a dual-channel design,one for protectionandoneformeasurement
- In the case of a direct ground fault, the calculation is carried out using a protection channel
- In the case of medium to high impedance ground faults, it automatically switches to the measurement channel for calculations
Technical Solutions
MaxIntel has design capabilities for polemounted switches and the relay protection, especially in grounding fault treatment.
- the grounding scientific research achievements won Awards.
- Municipal Science and Technology Outstanding Contribution Award
- National Electric Power Science and Technology Award
- Annual Power Technology Innovation Award
Result : lighter, smaller, simpler
Compared with the current mainstream products of the same type, the product has outstandingtechnicalperformance and key technical parameter indicators, and can fully support the applicationof high-standardscenarios in highly reliable power supply areas.
Quick-action
pole mounted breaker
magnetic
control
item
traditional
breaker
Pillar type, no SF6
Structural
form
Co-box, SF6
< 70kg
Weight
> 180kg
0（no PT）
PT weight
>200kg，2
set
< 10ms
opening time
≤40ms
< 30ms
closing time
≤60ms
≥ 30000 time
Mechanical
life
≥10000 time
Traditional polemountedbreaker
Light
- Weight < 70kg
- Two man can lift & move it with ease, without fear of any complex terrain.
Swift
- Opening time < 10ms
- Whole action time < 40ms
- Dispersion of opening and closing time < 1ms
Steady
- Number of parts is only 30% of the conventional type
- Mechanical life is 3times longer
Smart
- Built-in sensor
- High sensing accuracy
- State evaluation and activewarning
Accurate Calculation
The traditional approach of relying on zero sequence current is inaccurate, and a comprehensive approach of transient zero sequence current and transient zero sequence voltage should be adopted.
