Seeing that Xia Xue was unhappy, Zhang Yifu couldn't help feeling very happy. In order to make it more happy, he quickly said: "Director Zhao is too good. If Xia Xue comes, I believe that the same treatment can be done."

"Haha, the Electrical Institute has produced a lot of talents this year." Zhao Wenyuan realized the subtlety of the relationship between the two and stopped talking about it. He turned to Hu Lingling and smiled, "The new Hao Shuai you are from the Electrical Institute, isn't he?"

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

"I know you so well, upper and lower bunks." Zhang Yifu smiled, "If he is not active in his work, tell me that I will find an opportunity to hit him."

"Haha." Hu Lingling covered her face and smiled, "Look at what you said, Hao Shuai is still very serious in his work."

The atmosphere gradually grew up, and gradually, as the dinner deepened, the topic gradually shifted from chatting to this accident. Only then did Zhang Yifu understand why Zhao Wenyuan did not let Miao Delin come to have dinner with him, and talked about the accident in their factory in front of him, which was not thorough.

After Zhao Wenyuan nodded, Lu Tao, the dispatching director, finally revealed more information.

Summer has passed, and when it comes to annual inspection, North China Power Grid has arranged an annual inspection plan early, starting with Fengzhou Power Plant. Fengzhou Power Plant has five outgoing lines and two busbars. This morning, the shutdown operation was carried out as planned and the equipment was shut down.

These various lines are inevitably dizzy to outsiders, but as an expert Zhang Yifu still understands them very clearly.

As a large power plant, Fengzhou Power Plant has a total of 11 units and a power of 1.2 million kilowatts. It is undoubtedly very dangerous to merge into the power grid only through one busbar.

The busbar can be understood as a very thick wire that can withstand huge currents. But even so, one is not stable. Therefore, Fengzhou Power Plant has a dual busbar, which is responsible for sending the entire factory into the power grid. When something happened in the morning, one of the busbars was already under maintenance and was in the state of opening the gate. In fact, only one busbar is running. In a short time, there is no problem with this. The only premise is that there is no strange thing in this so-called "short time".

Beyond the busbar, there are the five outgoing lines. The outgoing lines can be understood as lines slightly inferior to the busbar, and the load can be beared is also very high. However, it is still not enough to support 11 units, so 5 lines are set up to connect to the busbars respectively. Each of these lines has a ** switch, and this time the matter is on the switch.

The five lines must be suspended in turn for maintenance as planned. First, the stop-off line No. 1 was ready to resume operation this morning, and then the suspension of the operation No. 2 was suspended for maintenance. The gate was opened during maintenance and closed after completion. This was in line with the regulations and the dispatch plan of the power management bureau. There was almost no problem with the duty monitor of Fengzhou Power Plant every step of operation.

But when the No. 1 exit switch was closed, something terrible happened.

The moment the switch closes, the entire switch explodes.

I have to mention the switch here. The switches in the power plant are different from those in the home. The switches at home can be pulled by just one click. They are purely insulated by air. As long as there is a centimeter between the two ends of the switch, the current will not be able to pass.

Different from power plants, the current and voltage are huge. Not to mention the spacing of a few centimeters, even a few dozen centimeters may be broken through the air and transmitted. Therefore, it is absolutely not possible to rely on traditional air insulation, and special insulation oil is needed to insulate it.

Therefore, this switch cannot be in the air, but in the fuel tank. There is also a saying insulating oil used in the fuel tank. On weekdays, when plugging and unplugging the pins, an electric flicker occasionally blows out and a sting sound often scares people. In the case of the 220v voltage used in civilians, this is not the case with 1,000 times the 220kv high-voltage electricity. When the high-voltage electricity is split and combined, it is definitely not as romantic as a flash of electric flicker. Instead, it is an arc, similar to small lightning. Imagine that if a switch has to flash every time it is operated, wouldn't it be rotten if the switch is broken several times? How many times a month will the fire come?

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

You can simply imagine that in a cylindrical oil tank, when the line is closed, as the two ends gradually approach, the middle will flash, but this behavior will be quickly extinguished by the insulating oil until the two ends are tightly attached to each other, and it will be considered smooth and safe. Of course, in the operation of the power system, this process must be completed quickly in a few dozen milliseconds. If the arc is pulled on both sides for half a minute, everything will be blown up.

Unfortunately, this morning, this thing exploded. Maybe it was a disagreement of yin and yang, maybe it was an operational error, maybe it was a Thunder God. In short, the comet hit the earth and the arc broke through some parts, and the big explosion occurred. The oil-filled switch turned into a steel bomb. In the flash, the insulating porcelain pieces flew around and hot oil splashed. This directly caused other switches not far away to collapse and incline one after another, further causing the switch to be grounded, and the voltage raised by the earth was swallowed by Mother Earth. Of course, this also includes the voltage of the busbar. Once the busbar strikes, everything is over. All the outgoing switches and unit switches connected to this busbar are tripped at the same time, the power plant units are all stopped, and the outgoing lines are all stopped. The poor North China power grid has lost more than 1 million kilowatts of power, and was affected by this serious fault shock, causing oscillation.

So the question is, why does it explode if a good closing operation?

This is the core of this investigation, and I understand why Ya was exploded.

To be precise, it is not why it is blown up, but what behavior causes it to blow up.

It is a bit difficult to say that, just because generally speaking, the reason for the explosion is very simple, that is, the difference in parameters, voltage, current and frequency, etc. The power grid is a coordinated whole, and each inlet and exit line must maintain the same frequency and voltage before it can run safely. If the voltage and frequencies at both ends are obviously discordant and are connected head-on, the contact point is in danger of explosion. Of course, the general manifestation of this explosion is tripping, and it will only explode when it is unlucky.

It feels like two aircraft are completing refueling in the air. The main aircraft and the refueling aircraft must maintain the same speed, height and direction to safely and harmoniously complete the refueling task. If these two aircraft fly indiscriminately, they will directly hit and explode.

In short, according to Director Lu Tao's description, this explosion was mostly caused by inconsistency at both ends of the closing line. The reason for inconsistency was also 80% due to the negligence of the operators of Fengzhou Power Plant. In the final analysis, Fengzhou Power Plant is doomed.

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