When the experiment began in the morning, the two gringos were quite happy to see Zhang Yifu coming, and immediately started talking and laughing, completely leaving Okamoto and Oda Kiri. This reason is also quite simple, these two brothers always come to Heihengdian with bitterness and hatred, which makes people uncomfortable, not to mention that they don't do the of the two experts.

Zhang Yifu is a lot more funny, chatting about Beijing's customs and customs, relaxed and casual, and he is also very willing to share the current situation of China's power industry, and is even willing to introduce relevant cadres to them, which is simply wonderful.

This is obviously a win-win situation, whether it is AES's investment in China or the introduction of Siemens' hydro turbine technology, it is an inevitable trend. Zhang Yifu is ostensibly sharing his knowledge, but in fact, he is also invisibly obtaining information from the two of them, whether it is Siemens' comprehensive theory of electrical equipment production management, or AES's investment and skills in power plants around the world.

This freehand chat continued until the end of lunch, when we returned to the test room. Just when everyone felt sleepy, Hu Haitao sent a report in the morning, because the two products are excellent, the test is going very smoothly, and the water has passed, but there is a slight difference in the action response time, and they all meet the standards.

"If it goes on like this, it only proves that both sides are excellent. Thomas was quite happy with the result, so he could finish his mission early and go to the provinces and cities in China that might need power investment.

"Well, the most important difficulties have been passed, and there shouldn't be much of a problem later. Schroeder also affirmed, "I can't imagine that China's level of microcomputer protection is really so high." ”

Seeing this, Hu Haitao expressed his appeal with the help of Zhang Yifu's translation, anyway, he has a lot of time. They wanted to conduct additional tests and evaluations according to Chinese standards, and the two international experts were naturally fine, but when they asked Okamoto and Oda Kiri, they met with serious opposition.

Again, Mitsubishi has suffered losses in the Northern Desert and is resolutely unable to accept the standards specified by the Chinese, and the water is too deep.

"One thing to one thing. Okamoto didn't let it go. "This time it is an evaluation of international standards, if it is a Chinese standard evaluation, it will be conducted separately after that, and we will voluntarily participate." ”

Thomas shook his head helplessly at Hu Haitao.

Hu Haitao also reluctantly explained that it is rare to get together so many people now, and it takes a lot of effort to evaluate, and the product is to be used in China's power grid, not according to the actual demand standard. It's a bit of a pity. Furthermore, the main purpose of this experiment is to evaluate which product is better and whether there is technical plagiarism, and the current results are not enough to draw conclusions.

But no matter what he says, the Japanese just don't agree, and it's okay to continue to do further experiments, you can do it yourself, and the two experts will give Hengdian a separate evaluation. It has nothing to do with us.

After persuading both sides, Schroeder had a whim. A plan that is likely to be acceptable to both sides is presented.

Today's situation, smooth sailing, is indeed indistinguishable, both sides naturally do not like it very much, in such a result with almost no difference, on the one hand, Hengdian can not prove categorically that he did not copy. Mitsubishi also couldn't prove that its product was better.

In the final analysis, the level of both sides is too high, and such standards cannot meet their requirements for the test, just like two top students taking a simple set of questions, both of which are 100 points are boring.

Then the easiest way. It's a set of super difficult questions.

Schroeder took advantage of the situation to propose that IEC is discussing the feasibility of a set of future standards, the requirements of this set of standards have exceeded the current technical level of microcomputer protection, and put forward higher requirements for the overall safety and stability of the power grid, this set of standards will be enabled in the future, but I don't know whether it is three years or five years later, if both sides accept, you can try it according to that set of standards, you two high-achieving students are not proud to fly? Let's take the topic of doctoral students.

Hearing this, Okamoto immediately nodded in agreement, he is absolutely confident, Hengdian plagiarism is a fact, but it will never be able to copy our Yamato soul, improve the standard, and it will inevitably be exposed.

Zhang Yifu even agreed, don't call the little girl anymore, grandpa has a headache when he hears it, it should have been like this a long time ago, I want you to know what the gap is.

Chen Yanrui secretly pulled Zhang Yifu and expressed his worries.

"Yifu, do you really want to do this? We don't know what the situation is with that set of standards......" Chen Yanrui has taken a steady line after all, and now he is on a par with Mitsubishi is already the best ending he can imagine.

"It's interesting not to know, but the ability to deal with all kinds of extremely complex situations is where the advantage of our products lies. ”

"After all, people have accumulated more than ten years of experience...... We've only been running for a year and we're only in the third version so far. ”

"Isn't there a shame in losing!"

“……”

With the agreement of both parties, Schroders consulted the IEC headquarters, and the new standards were faxed over, and everyone looked through them one by one after making copies.

Everyone was shocked at this moment. The existing standards are equivalent to requiring you to do your job well, junior high school students are one-dimensional quadratic equations, plane geometry is enough, and this new set of standards is to let you calculus, three-dimensional geometry, solve many problems and difficulties that cannot be required now.

In the field of microcomputer protection, there are many conceptual theories, in the research stage, not at all, this set of standards is to assume that after these are realized, the level of microcomputer protection should be achieved.

Okamoto was first surprised after reading it, and then secretly delighted, in product design, he has always been excellence, the details are perfect, and the way to deal with these problems will undoubtedly be more stable, not to mention that it has been more than a year since Zhang Yifu visited Japan, and their current products have been upgraded to several versions, and he can't copy new things.

Zhang Yifu did not change his face and did not move, and he looked at Hu Haitao, which was too funny.

This standard has a lot of similarities with the first draft of China's microcomputer protection regulations just obtained by Hu Haitao, and the requirements for everything are more detailed.

After both sides agreed, the experiment of the top doctoral students was launched again. This time, everyone paid attention to it, and Schroeder and Thomas had no intention of continuing to make soy sauce, and were very concerned about the performance of existing products under this standard.

"Thanks to the state-of-the-art testing facilities here. Schroder sighed at the advancement of large-scale dynamic model testing systems, "IEC wants to test this set of standards, and such equipment must be introduced." ”

The current power grid simulation test system is indeed much more complex than the general one, according to the demand, up to 8 tested microcomputers can be connected at the same time to simulate each point in a huge power grid.

Hu Haitao and others adjusted the wiring and built the environment in accordance with the requirements in the new standard.

The first one to be tested is very difficult.

Line distance protection instantaneously cuts off the fault range. The traditional line distance protection does not rely on communication to receive peer information, and only single-end judgment can only achieve instantaneous fault removal within 60%-70% of the distance range of the line. The reason is very simple, considering the actual connection of the power grid, the field measurement error, etc., it is difficult to accurately judge whether the fault near the end of the line is the line or the adjacent line, more than 70% of the distance, it is inconvenient to judge whether it is within the line of this protection. Therefore, the whole line protection needs to communicate at both ends, because if one end exceeds 70% of the distance, and for the other end it must be within 30% of the distance, then the two ends will be a handshake through the information, which is a fault in the area and trips. If the fault exceeds 100%, then it is definitely not within the range of the opposite end, and the double-end information meets as soon as it is an out-of-area fault, and the trip is to add chaos. It is only through the communication channel to determine whether the line is faulty, and then carry out the action, which will undoubtedly affect the protection action time, and the rapid removal of the fault is the need for the safety of the power grid, so the quickness is the most important indicator of relay protection.

To put it simply, in the traditional standard, if the line length is 100KM, and the fault occurs within the 70KM range, it is required to trip instantaneously, and outside 70KM, it takes a certain amount of time to wait for the comprehensive judgment of the opposite end information, if it is in the 100KM position, it belongs to me who is responsible, if it is in 101KM, it is the next line, and I do not move.

The error of traditional protection products is placed here, and in the distance near the junction of the two lines, there will inevitably be errors in judgment in protection, specifically the distance between 95KM and 105KM.

The IEC is holding on to this new standard, the original only need to ensure 70% of the range of rapid action, now it is proposed to reach 95%, which is based on the microcomputer more accurate working current and more accurate logic algorithm, or the algorithm and logic put forward a temporary difficult to achieve standard.

In the face of this standard, Okamoto has been gearing up, joking, Japan's relay protection and signal components must be the most accurate, for the accuracy of distance calculation is perfect, unless you go to the Japanese factory to steal these things, it is impossible to be better.

Mitsubishi took the lead in conducting the test, conducting four sample tests at the four in-line distances of 85%, 90%, 95%, and 99%, and then four tests at 101%, 105%, 110%, and 115% out-of-line distances.

In terms of results, it also fully confirmed Oda Kiri's self-confidence.

For the simulated 220 thousand volts 150KM or more type line, this set of standards does not give a delay time, requiring the protection of 20ms to complete the fault judgment and action within 95%, which is equivalent to the full line requirements for quick break, Okamoto is clear, this must not be completed, but Mitsubishi only needs to be faster and more accurate than constant electricity. (To be continued......)