After another burst of laughter, Chen Yanrui slightly lowered his tone and decided to pour a basin of cold water on Zhang Yifu: "Yifu, a microcomputer protection project, several domestic ones."

He said, picking up Mitsubishi's promotional materials again: "As for such a product, it may take a long time to work hard."

"What is the difficulty?" Zhang Yifu asked directly.

"The microcomputer part, principle algorithm." Chen Yanrui shook his head helplessly, "We just understood the traditional relays. The integrated circuit was just starting to study, but it turned out to be microcomputerized."

"Will this algorithm be very complicated?" Chang Jiang asked, "I have been doing automation for so many years. If I have to be careful, there are indeed many complex algorithms in the power grid area. But Zhibao only focuses on a single power equipment? How complex can it be? Accurate A/D conversion and i/o interface are the difficulties, right?"

"A/d and i/o have ready-made chips that can be used. The difficulty lies in the principle of software algorithms according to different hardware conditions..."

"There are also such tasks in automation, which are nothing more than derivative algorithms, differential algorithms, and Fourier series sets!"

The old and the young argued about this. Since the two of them had completely different majors, they basically said one by one and one by one, and no one cares what the other person was saying.

"Two, two." Zhang Yifu couldn't stand it and interrupted, "Let's just discuss the feasibility of independent research and development, so don't talk about the details first?"

"If the details are not discussed well, how can we be feasible?" Chen Yanrui was already on the verge of the moment, thinking that these two young people really underestimated this thing.

"Come on, let's talk in parts." Zhang Yifu had already figured out his ideas before coming, and took out the paper and pen and pulled it up. "In general, it can be divided into two parts: software and hardware, right?"

"Of course." Chen Yanrui nodded.

"Talk about the hardware first." Zhang Yifu then drew a picture. "Electrical quantity collection, CPU, switch quantity input and output, and power supply, can it be roughly divided into four parts?"

"Barrely enough." Chen Yanrui nodded again, "The core computing, signal circuits, human-computer dialogue, etc., are all processed by CPU, right?"

"Yes." Zhang Yifu then said, "We won't discuss the power supply. It's not difficult, is it okay?"

"no problem."

"Do you have any objections to directly purchase mainstream models in the market?"

Chang Jiang interrupted: "It depends on the cost requirements."

"Okay." Zhang Yifu continued to draw the next part, "The switch quantity is not much different from traditional relay protection. If all the other parts are done, Teacher Chen is completely clear about this, right?"

"..." Chen Yanrui said, "Of course, this part of the principle is almost the simplest."

"The final collection of chips is indeed quite complicated. We will develop several mainstream market types and conduct experiments and research. Chang Jiang has experience in this area, which is actually part of the automation of power plant operation. Do you have the confidence to conquer it?"

"Of course, this is much simplified than power plant data acquisition." Chang Jiang nodded.

"This is endless!" Zhang Yifu slapped his palms. "This is a capable thing!"

OK, now it’s not just Chen Yanrui, but Chang Jiang’s cold sweat is flowing down.

"Yaohu... you are a sensible person." Chen Yanrui sighed, "According to what you say, if you get iron lumps, you will create an aircraft, and if you find uranium, you will explode a nuclear bomb!"

"Is it a way?" Zhang Yifu smiled and took out a thicker stack of materials, "Why do I have no way to find you?"

The two looked down at the cover of the material and were immediately stunned.

"Epr-866a Line Microcomputer Protection Product Design Book"

The two of them looked at each other, okay, this grandson would never have had a problem without reason. As expected, he was prepared.

"I'll ask first, how is this model determined? What does EPR mean?"

"eternal-power-relay." Zhang Yifu said embarrassedly, "I think it's more formal. If you are blind, you may not use this."

"Power is electricity, energy, relay is relay, I know, what is eternal?"

Zhang Yifu wanted to show off and finally felt that it was too artificial and said secretly: "Eternal."

"...Okay." Chang Jiang swallowed and spitted, and finally picked up the material and turned it over.

Chen Yanrui also picked up another one and said curiously: "What does 866a mean?"

"This just sounds comfortable, let's go!"

"...Okay." Chen Yanrui immediately filtered this unreasonable model.

Zhang Yifu had no choice. He could not bring all the abbreviations set by his predecessors. This sense of incongruity would undoubtedly arise. However, the goods inside were all real, which was almost the pioneering work of domestic first-class manufacturers in the past.

Protection is divided into many categories: line protection, generator protection, transformer protection, reactor protection, capacitor protection, etc. Because they have different characteristics when there is a failure, the electrical quantity changes have their own characteristics, so there are still some differences between the core algorithms. When Chang Electric is working on it for free, it is naturally necessary to choose a category with relatively simple principles and large demand, and line protection is the first to be affected.

From the smallest power poles spread all over urban residential areas, to the outlet towers of power plants and substations, to the towers of ultra-high voltage transmission lines, power lines can be seen everywhere. Power lines are high and low, thick and thin. The higher the voltage line, the higher the line is, the thicker and thicker it is. Each voltage level is converted by transformers, and after conversion, there are many lines at each voltage level. Some people are asking, is it impossible to unify a voltage? Why do you need to change it?

The reason is very simple. The electricity emitted by the high-speed operation of giant steam turbines is terrible. If this electricity is directly transmitted to residents' homes, it will basically be a disaster along the way. Not to mention the electrical appliances in residents' homes, even residential buildings will be like a purgatory.

Therefore, voltage conversion is essential and complicated, like an irregular function diagram. The electricity emitted by the generator is a voltage, and it is a voltage that is uniformly collected into the power plant bus. When the power plant is transmitted to the hub substation, it is another voltage. In order to reduce transmission consumption, a higher voltage will be used. At this point, the voltage is basically over. At this moment, the electricity is finally transmitted to the edge of the electricity-using city. Generally, there will be one or several hub substations here. In these substations, some voltage is reduced through the transformer, input into the city backbone network, and then drop it again after entering a certain area of ​​the city. When you arrive at the entrance of your residential community, you will get it again. After multiple step-downs are completed, it is basically the 220v we need in our lives.

As you change, you need to protect as much as you have.

Of course, not every line is equipped with the highest relay device. At this moment, a considerable number of unimportant low-voltage-level terminal lines have protection devices that are not much better than fuses.

But with the development of the times, advanced relay protection will surely be configured on every line. In the future, even most residential buildings will not be fuse-free, and power supply companies have been converted to direct tripping protection.

Hang Electric cannot catch up with this huge transmission line market, but it seems that there is still a chance for this huge microcomputer protection market.

What's more, as Chang Jiang said, microcomputer protection is equivalent to a miniature version of the automation system. The entire device is formed into a simple and direct automation through digital means - if there is no problem, it will continue to run, and if there is danger, it will be cut off.

After doing this product, the subsequent generator protection, transformer protection, etc. are similar, and the difficulty is absolutely difficult, but it is not as complicated as it is now starting from scratch.

Before I knew it, half an hour passed.

This time, it is different from the general concept given by Zhang Yifu every time. It is a thorough product design description. It is definitely not as clear as the economizer drawings that Chang Siping looked at back then. You need to follow the design ideas step by step, and you need to carefully consider the a/d conversion method, hardware structure, and damn algorithms.

Even if everyone is from science and engineering, it will not take a long time to understand this series of judgments and algorithms. After thinking about it for 40 minutes, Chang Jiang's head finally exploded.

"Yifu, have you studied in the mathematics department?" He wiped his sweat and stared at Zhang Yifu.

In fact, these algorithms are compulsory content for future power system courses, and graduate students will also be involved at this time.

"I taught myself a little, and this time I went to Japan to find another opportunity to ask for advice."

"Did you go to a Japanese university during the inspection?" Chen Yanrui also asked.

"I went in my personal name..." Zhang Yifu forced a smile, "so this idea suddenly unfolded, haha, haha..."

"This is too..." Chang Jiang held the material in his hand, "This needs to be studied for half a month...give us time to understand."

Chen Yanrui simply asked: "Can you use it to discuss it with others? I have very little research on these contents."

"It's hard to grasp the scale of discussion, right?" Zhang Yifu asked back.

The pirated economizer has already caused him a headache. This time, the microcomputer protection would rather progress slower than leak it out.

"Yes, yes." Chen Yanrui asked vigilantly, "What about the new people here?"

"This one is published for them to show." Zhang Yifu then took out a slightly thinner material from his bag. "This is a simplified version, and all the important details and data are omitted. What you have in your hands is the complete version, so please keep it confidential."

"You..." Chen Yanrui was completely stunned, "Are you going to Japan to inspect or engage in commercial espionage?"

Chang Jiang laughed and said, "Mr. Chen, if he engages in espionage, he will definitely get the supercritical unit's stuff back. Why do you have the microcomputer protection?"
Chapter completed!