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无忧 PPT整理发布
Voltage Collapse In Wind Power System
Yuhan ZhangUNI: yz2500
ELEN E9501 Presentation
无忧 PPT整理发布
1.Why There Will Occur Voltage Collapse
2. What the Researchers Done on This Topic
3.My Idea Came From?
4. Introduce the Model
5. The Cases I Focus On
CONTENT
无忧 PPT整理发布
Violation of voltage limits and undesirable line outages are leading power systemsto voltage instability and ultimately to voltage collapse. Sudden load increases orInsufficient reactive power supplies may also contribute to voltage collapse and Blackouts.
Voltage collapse or blackouts have occurred worldwide:
France 1978 Belgium 1982 Florida USA 1985 Western France 1987 Southern Finland 1992 Northeast USA 2003 Italy, England 2003
1.Why there will occur Voltage Collapse
无忧 PPT整理发布
Northeast Blackout – August 14, 2003
• Affected 55 million people• $6 billion lost• Per year $135 billions lost
for power interruption
1.Why there will occur Voltage Collapse
无忧 PPT整理发布
1.Why there will occur Voltage Collapse
Keep zs and power factor constant|zs/zld|=1=>Pmax
无忧 PPT整理发布P-V curve
无忧 PPT整理发布
2. What the researchers done on this topic
Analyze the reason why the voltage collapse
Try to find the accurate voltage collapse point
Static analysis
Dynamic analysis
It’s a really brief conclusion about what others have done. In the following presentation, I will focus on what I have done and what I will do.
无忧 PPT整理发布
3. My idea came from?
Wind power is out of control—voltage
stability is threatened
Existed power grid problem
Smart grid
Renewable energy sources
Wind power advantages
Disadvantages are significant
无忧 PPT整理发布
3. My idea came from?
Although wind power cannot be controlled, we can do the prediction based onthe history data and the weather report. Hence we can use the prediction data to analyze the next hour/day power and voltage distribution. It is helpful to the power grid dispatching.
Voltage Collapse In Wind Power System
无忧 PPT整理发布
4. Introduce the model I use
Dependent on:1.Pout2.Qout3.Rline, Xline … Zs=Rs+jXs
Zld=Rld+jXld
First step: a simplified model
无忧 PPT整理发布
4. Introduce the model I use
Second step: a more complex model
PQ nodes (#1, #2, #3, #4 and #5); PV nodes( Generator set #6, #7, #8);Equilibrium node (#9).
无忧 PPT整理发布
5. The cases I focus on
Use the prediction data to analyze
Use the actual data to analyze
Compare the two sets of data
无忧 PPT整理发布
Thank You!
Yuhan ZhangUNI: yz2500
ELEN E9501 Presentation
