"Ladies and gentlemen, I am also concerned about this matter. "In fact, in the past two years of operation, the advantages of imported products have become more and more limited, and in many cases, due to the difference between standards and power grid conditions, imported products are not as stable as domestic products." ”

Xiong Dalin further explained: "I'll just talk about a typical situation. The structure of foreign power grids is relatively strong, it is not an exaggeration to say that it is a spider web, it doesn't matter if one is broken, there are still many lines to go to the current, and the ability to resist failures is very strong, so their protection logic will not be very complicated, and if they detect abnormalities, they will trip immediately, without too much consideration. At this stage, the domestic power grid is much thinner, between two points, there are often only two or three lines, one accident tripped, and the other line current increases suddenly, and it is easy to overload. In the face of this kind of overload, the imported protection products will directly trip the action, so that the only remaining line will face a huge load transfer, almost inevitably collapse, so our usual practice is that in the face of this kind of overload, the dispatcher will quickly adjust, rather than directly tripping, otherwise it will be a chain reaction, and a large piece will be stopped as soon as it is stopped. ”

"The above is only the most common, the most basic problem, but it is enough to reflect the problem, foreign line relay, for the accident judgment rules and domestic products are significantly different, they consider the problem is relatively simple, of course, we also hope that one day we can consider the problem so simply. ”

Hearing this, the participants all smiled shallowly, smiling sadly and helplessly.

Xiong Dalin saw that everyone was very interested in listening, so he took the trouble to explain: "For another example, the system oscillates, and the electrical quantity will change, but this is different from the change in the electrical quantity when the short circuit is faulty, so the oscillation and short circuit. It can be judged and treated differently by some principle calculations. In the requirements of our power grid, line protection must strictly distinguish between oscillation and failure, there is a term called "oscillation locking", that is, locking protection during oscillation, which is equivalent to the point point in martial arts novels, and the acupuncture point is sealed. No tripping, no movement. ”

Hearing this analogy, even Hu Haitao couldn't help laughing: "Director Xiong is really colorful, it's a pity not to teach at the university." ”

Dean Hu smiled. Xiong Dalin's face flushed, he really accidentally entered the play, but he had to finish talking about what he was talking about, so he only continued to explain, "Follow what I just said." If it is an oscillation, we will point the point, lock, and not trip, and if it is a short-circuit fault, we still need to protect the first trip action. We are so strict in order to prevent a chain reaction of large-scale power outages, because the oscillation itself does not affect the work of the line. On the other hand, if the line is cut off due to oscillation. For us, it will create a situation that is more difficult to fix. Therefore, our protection logic and principle are more complex. On the other hand, foreign protection does not take these things into account at all. Line protection tripping abounds during oscillation, and last year some mismovements were caused by this, and in some cases the accident was amplified. Take the 866A as an example, after detecting the oscillation of the system, the 'oscillation lockout' function will come into play. The protection cannot be changed, so that the line is unblocked, so that we can always keep the existing line clear in the face of oscillation, and let the dispatcher make adjustments. There will be no widespread power outages. ”

Xiong Dalin was afraid that he would speak too carefully, and everyone didn't like to listen to it, but seeing that everyone nodded with relish, he breathed a sigh of relief and said: "There are many situations like this, and the oscillation locking I said is only one aspect." In the future, with the advent of more microcomputer protection products such as generators and transformers, there will undoubtedly be more problems in this regard. The reason for this contradiction is also very simple, that is, we do not have a restriction on imported products, there is no standard, too trusted, who wants to use who to buy it, thinking that you can sit back and relax with imported goods, and many times, products that do not meet the situation of our power system are not as comprehensive as the performance of domestic products, which brings hidden dangers to the safety of the power grid. ”

Xiong Dalin also felt that what he said was not enough, and soon thought of a metaphor: "Our protection is equivalent to that of a poor daughter-in-law, who knows that her in-laws' family has a limited background, is diligent and thrifty, and pays attention to the details;

Now everyone laughed even harder, it's a pity that Xiong Dalin doesn't teach.

"Director Xiong is right. Hu Haitao was still unsatisfied, and realized the significance of Xiong Dalin's tirade, and turned to say tentatively, "I didn't expect that our meeting today would be discussing matters of this height, why don't I invite the dean over?"

A person next to him hurriedly said: "The dean was originally going to come, but later I saw that there was a meeting on the agenda that could not be postponed." ”

"Hmm......" Hu Haitao pondered for a moment, and asked Xiong Dalin, "I roughly understand what Director Xiong meant, are you planning to join the process of imported product evaluation?"

"As soon as I said one, Dean Hu thought of two, three, four, five, six. Xiong Dalin smiled gently, "That's true, in the past, we didn't check imported products, because we didn't have technical conditions, we didn't have products, and our standards could only rely on the international community and learn from them." But now it's different, we have a sufficiently advanced level of evaluation, and there are high-level products, but the specifications and standards of imported products are different from our situation. I think it's almost time to treat everyone equally, and any successor should come to our power research institute to evaluate it to ensure that it is practical, durable, and qualified, and then put into production, which is of great significance to our safety production. ”

Xiong Dalin pointed out his words, and everyone realized why they wanted to gather so many big people to discuss!

Co-author Zhang Yifu was angered this time and planned to change the rules!

However, this is not like an act of righteousness, Xiong Dalin is right. Indeed, the laissez-faire treatment of imported products has interfered with our safe production. In the past, there was no ability to evaluate such high-end things, but now it has changed, and countless manufacturers are seeking to enter the Chinese market, and the product level is uneven.

Taking a step back, once this measure is implemented, it is undoubtedly an improvement for the authority of the Electric Power Research Institute in domestic and foreign power technology, and the Electric Power Research Institute is not only to evaluate domestic products, but to be in line with international standards.

Taking a step back, joining this process is also a check on the quality of foreign products and the importance of manufacturers, as Xiong Dalin said, it is of great significance to safe production.

Everyone is just used to not being confident, obviously there is already this level and confidence, no one even thinks about it, now Xiong Dalin mentions it, everyone ponders and discusses, it is simply beneficial and harmless!

For the leaders of the relay protection department and the cadres of the relay protection -- safety has been implemented.

As far as the Electric Power Research Institute is concerned, power has begun.

After several discussions, everyone almost had only one idea - why not do it earlier?

This is a good thing, so why not do it earlier?

The reason is actually quite obvious.

The Electric Power Research Institute is an academic institution with limited powers, so it cannot require so many units and not have the courage to send such a large document to all imported relay products for testing.

The authority is in the Ministry of Electric Power, that is, in the relay protection department of the dispatching bureau, they have the power and prestige to standardize the process, but they hardly see any direct benefits in doing this, and they don't know whether the Electric Power Research Institute has the ability and the initiative to do it, so this matter has dragged on, and no one has the heart to mention it.

This time, Zhang Yifu used his personal influence and connections to string the two sides together, and China's technical level has also arrived, which is simply a matter of course. In the previous life, this matter was actually mentioned by a leader sitting in Xiong Dalin's seat, there are always people who are not afraid of hardship or tiredness and focus on production and safety, but that was a few years later, and Zhang Yifu couldn't wait for such a character to appear.

Since this matter is really beneficial to everyone and all institutions, everyone has been discussing it for a long time, but it is really impossible to grasp half of the contradictions.

In the end, Li Minghe was tired of hearing this, and asked directly: "Dean Hu, does the Electric Power Research Institute have this level of strength?"

"There must be this. ”

Li Minghe turned to Xiong Dalin: "Director Xiong, the Relay Protection Department, you can also issue this document." ”

"We have been planning this document for a while, and it can be ordered at any time, and the leaders of our dispatch bureau and production department are all supportive. Xiong Dalin nodded, "Including Minister Qin, I also hope to standardize this process as soon as possible." ”

"Isn't this over?" Li Lao clapped his palms, "All that remains is for the leader to sign and implement." ”

Everyone laughed, and the old professor thought it was too simple.

But this time it really bumped into, and there should be no leader who will object. Not to mention anything else, the testing of the Electric Power Research Institute also has to charge corresponding remuneration, and international manufacturers are lining up to test, which is also a labor bonus for the Electric Power Research Institute! In order to cope with the sudden increase in business volume, building buildings and recruiting equipment must also be put on the agenda, and the power resources of leaders and organs have developed little by little!

However, some people with a heart still attribute this matter to Zhang Yifu, presumably he had already done a good job of the article in advance, otherwise why would Xiong Dalin make such a long speech, and why would the Production Department of the Dispatching Bureau, and even Minister Qin know about and support this matter?

"In this matter, the opinions are also unified, let's go back to the beginning. Li Minghe turned to Zhang Yifu, and knew that he had done so much, and the purpose was already very clear and resolute, "The evaluation of Hengdian and Mitsubishi's products can obviously be regarded as the beginning of this matter, so that everyone knows that at home and abroad, without discrimination, everything that should be sent for inspection must be sent for inspection." ”

Because the things just discussed were so smooth and happy, everyone almost forgot what Zhang Yifu said at the beginning. (To be continued......)