Recent
A piece of good news caught the attention of the headliner
China's highest altitude tuning camera group officially put into operation!
Wait a minute!
What is the "Tuning Camera"?
Can I take pictures? Does it come with a beauty function?
Professionals say: completely off track ...
Fortunately, the headline jun is smart and studious,
Finally figured out what is "tuning the camera",
This gives you a popular science!
In simple terms:
The tuning camera is a rotational reactive power compensation device
Don't worry, let's start with what is "reactive"!
In the power grid,
The electrical power supplied by the power supply load is divided
Active and reactive power.
Active power P
It is the electrical power required to maintain the normal operation of electrical equipment, that is, the electrical power that converts electrical energy into other forms of energy. For example, electric lights convert electrical energy into light energy.
Reactive power Q
More abstract, it is used to exchange electric fields and magnetic fields in circuits, and is used to establish and maintain the electrical power of magnetic fields in electrical equipment.
It does not work externally, but transforms into other forms of energy, so it is called "reactive power".
Reactive power is by no means useless power,
Let's take an example!
A ship traveling on the surface of the sea requires power and buoyancy.
With power, the ship can reach its destination,
With buoyancy, ships can float on the surface of the sea.
Active and reactive power
It's like the power and buoyancy of a ship.
The reactive power compensation device can be visually understood as
A device that provides "buoyancy" to an electrical device.
Why is it necessary to supplement reactive power?
If the supply of reactive power in the grid outstrips supply,
The electrical device does not have enough reactive power
to establish a normal electromagnetic field,
so
These electrical devices cannot
Maintained at rated conditions,
The terminal voltage of the electrical device will drop,
Thus affecting the normal operation of electrical equipment.
It's like buoyancy if it's not enough.
The ship will move forward and "sink"...
In UHV AC/DC grids
The reactive power supplied by the generator and the high-voltage transmission line is far from meeting the needs of the load, and there is a problem of dynamic reactive power at the receiving end of the HVDC transmission, which affects the stable operation of the power grid.
At this time, it is necessary to set up a reactive power compensation device to supplement the reactive power and ensure the normal operation of the power grid and electrical equipment. Our protagonist "Tuning Camera" came into being!
Below, applause has please tune the camera to introduce yourself
Tune the camera
Hello everyone
I am to the power system
Synchronous motors that provide or absorb reactive power.
You can also call me the "stabilizer" of the grid.
Specifically,
When the grid voltage drops,
I can increase the reactive power output;
When the grid voltage rises,
I can absorb reactive power.
I probably look like this
You must be wondering what the "phase" I tune is?
It is actually the phase angle between voltage and current.
The voltage phase sometimes advances the current phase,
Sometimes hysteresis current phase,
At this time, I need to adjust it.
Improve the power factor,
Make conveying more efficient!
I run side by side with the grid,
Located on the AC side of AC to DC and DC to AC.
Once the AC and DC commutation fails,
At the moment of grid failure,
I can transform in an instant,
With my strong "explosive power",
Quickly release a large amount of reactive power,
Reduce the amplitude and speed of the grid voltage drop,
Isn't it great!
At the hub substation, converter station
and receiving substations, converter stations,
You can see me,
I am a well-deserved "safety guard" of the power grid.
So here's the problem.
What is the difference between the highest tuning camera group in China?
At 22:18 on December 1, the first camera unit of the Qinghai-Tibet DC Networking Project Lhasa Converter Station was officially put into operation.
It is understood that the Lhasa converter station installation camera project is located in the west of Langtang Village, Ganqu Town, Linzhou County, Lhasa City, with an altitude of more than 3800 meters, which is currently the highest level camera project in China.
As the altitude rises,
Thin air density,
Atmospheric pressure is reduced accordingly,
Adjust the camera heat dissipation ability is weakened,
Air breakdown field strength decreased,
Adjusting the camera is more likely to produce corona,
It consumes electrical energy and interferes with radio waves.
Corona refers to the phenomenon of partial discharge of the surface of a charged body in a gaseous or liquid medium.
In order to adapt to the high altitude,
Adjust the camera at the Lhasa converter station
The use of all-air-cooled modulated cameras, in the cooling system device, equipment selection, anti-freezing and other aspects of the adoption of a different scheme and design.
Adopt advanced anti-corona technology and anti-corona structure to meet the requirements of high-altitude operation.
Optimize electromagnetic load, improve high altitude adaptability, optimize cooler, improve the heat dissipation capacity of the unit.
Senior
After all the highest-profile camera group projects in China are put into operation, the voltage stability level of The Tibet power grid will be significantly improved, the power supply capacity of the Lhasa load center will be increased by 16% on the existing basis, and the safe and stable operation level and power supply guarantee capacity of the Tibet power grid will be further improved.
Finally, the headliner would like to say:
Whether you read it or not,
Give a thumbs up to this steady happiness and go again!
Some of the images originate from the Internet.
Thanks: Li Yalou Li Zhiqiang Sun Hangyu Yang Yadi Cao Yongjun Yan Junhong Zhu Tengchao Pan Kai Gao Shijun
Editor-in-charge | Zheng Xinyue Executive audit | Song Weijie