Seeing that Xia Xue was unhappy, Zhang Yifu couldn't help but feel very happy, in order to be more happy, he hurriedly said: "Director Zhao has a good reputation, if Xia Xue comes, I believe that the same treatment can be made." ”

"Hehe, there are a lot of talents in the Electric Power Institute this year. Zhao Wenyuan sensed the subtlety of the relationship between the two, and didn't talk about it anymore, turned to Hu Lingling and smiled, "The new Hao Shuai in your department is also from the Electric Academy, right?"

"Yes. Hu Lingling looked at Zhang Yifu and said, "Do you know Xiao Zhang?"

"Too acquainted, bunk beds. Zhang Yifu smiled and said, "If he is not active in his work, you tell me, and I will find an opportunity to beat him." ”

"Huh. Hu Lingling hid her face and smiled, "Look at what you said, Hao Shuai is still very serious about his work." ”

The atmosphere gradually brought up, and gradually, as the dinner deepened, the topic gradually shifted from small talk to this accident. Zhang Yifu also understood why Zhao Wenyuan didn't let Miao Delin come to accompany him to dinner, and talked about the accident in their factory in front of him, which was not thorough.

After Zhao Wenyuan nodded, Lu Tao, the director of the dispatch department, finally revealed more information.

After the summer, when it was time for the annual inspection, the North China Power Grid arranged the annual inspection plan early, starting with the Fengzhou Power Plant. The Fengzhou Power Plant has a total of five outgoing lines and two bus bars, and this morning the gate operation was carried out as planned, and the maintenance equipment was suspended.

These various lines will inevitably be dizzy to outsiders, but as an insider, Zhang Yifu still understands it very clearly.

As a large power plant, the Toyosu Power Plant has a total of 11 units and a power of 12o kilowatts. In the end, it is undoubtedly dangerous to connect only one bus to the grid.

A busbar can be understood as a very thick wire that can withstand huge currents. But even so, one is not stable, so the Fengzhou power plant has set up a double busbar, which is responsible for sending the entire plant's electricity to the grid. When the accident occurred in the morning, one of the busbars was already under maintenance and was in the state of opening the gate, and in fact only one bus was running. In a short period of time, this is no problem. The only premise is that nothing strange happens in this so-called "short time".

Outside the busbar, there are 5 outgoing lines, which can be understood as lines that are slightly inferior to the busbar, and the load that can be borne is also very high. However, it was still not enough to support 11 units, so 5 lines were set up, which were connected to the bus. And each of these lines has a ** switch, and this time the thing is on the switch.

The five lines will be shut down for maintenance in turn, and the No. 1 outlet, which was stopped first, is ready to resume operation this morning, and then the No. 2 outgoing line will be suspended for maintenance. Pull the brake during maintenance and close it after it is done, which is in line with the regulations and the scheduling plan of the power authority. The shift leader of the Toyosu Power Plant has almost no problems with every step of the operation.

But when I closed the No. 1 outlet switch, something terrible happened.

The moment the switch closes, the entire switch explodes.

Here I have to mention the switch again. The switch of the power plant is different from the one at home, the switch at home can be pulled casually, purely by air insulation, as long as the two ends of the switch are separated by one centimeter, the current will not be thought of.

Unlike power plants, the current and voltage are huge. Not to mention the spacing of a few centimeters, even if it is a few tens of centimeters, it can penetrate the air and pass through. Therefore, it is absolutely not possible to rely on traditional air insulation, and it needs to be insulated by special insulating oil.

Therefore, this switch can not be in the air, but in the oil tank, and the insulating oil used in the oil tank is also said. At home on weekdays, when plugging and unplugging the latch, occasionally blow a flash spark, stabbing a sound, often can be scary, in the case of civil 22ov voltage, not to mention 1ooo times this 22okv high-voltage electricity, in the high-voltage electricity division, when combined, it is definitely not so romantic as a flash, but instead of an electric arc, similar to something like small lightning. Just imagine, if a switch has to flash every time it is operated, the switch will not rot after a few times?

Therefore, in addition to insulation, insulating oil should also have the function of extinguishing the arc.

It can be simply imagined that in a cylindrical fuel tank, when the line is closed, as the two ends gradually approach, the middle will pull the arc and flash, but this behavior is quickly extinguished by the insulating oil, until the two ends are tightly together, it can be regarded as smooth operation and peace. Of course, in the operation of the power system, this process is to be completed in tens of milliseconds, if you let the two sides pull the arc for half a minute, everything will have to explode.

Unfortunately, this morning, it blew up. Maybe it was the discord between yin and yang, maybe it was a mistake in operation, maybe it was Thor, but in the end, the comet hit the earth, the arc broke through some parts, and the big bang was born, and the switch full of oil turned into a steel bomb, and between the electric light and flint, the insulating porcelain pieces flew around, and the hot oil splashed everywhere. This directly led to the collapse and tilt of other switches not far from the adjacent one, and further led the switch to grounding, and the voltage that was painstakingly raised was swallowed by Mother Earth, of course, this also includes the voltage of the bus, as soon as the bus strikes, a qiē is finished, all the outgoing switches and unit switches connected to this bus are tripped at the same time, the power plant units are all stopped, and the outgoing lines are all stopped, and the poor North China Power Grid, while losing more than 1oo kilowatts of power, was affected by this severe fault impact, causing oscillation。

So the question is, why does a good closing operation blow up?

This is the core of this investigation, to understand why Ya exploded.

To be exact, it's not why it's fried, it's what behavior leads to zhì frying.

It's a bit awkward to say this, just because generally speaking, the reason for the frying is very simple, that is, the parameters are poor. Differences in voltage, current, frequency, and other parameters. The power grid is a coordinated whole, each line in and out, to maintain the same frequency and voltage, before safe operation, if the voltage frequency at both ends is obviously not harmonious, but also hard to connect together, the contact point has the danger of exploding, of course, the general embodiment of this explosion is tripping, only when bad luck will really be fried.

This feels like two planes completing the refueling action in the air, the main aircraft and the tanker must maintain the same degree, the same height and the same direction, in order to safely and harmoniously complete the refueling task. If these two planes fly indiscriminately, they will directly collide and blow up.

In short, according to Director Lu Tao's description, the bombing was due to the uncoordinated guidance at both ends of the closing line, and the reason for the incoordination, and the eighty percent was due to the negligence of the operators of the Fengzhou Power Plant, so in the final analysis, the Fengzhou Power Plant was in a catastrophe.

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