After another burst of laughter, Chen Yanrui lowered his tone slightly, and decided to pour a basin of cold water on Zhang Yifu: "Yifu, the microcomputer protection project, several top schools in China, have done research for several years, and the results are limited so far. ”

As he spoke, he picked up Mitsubishi's promotional materials: "As for such a product, I'm afraid it will take a long time to work hard." ”

"What's the difficulty?" Zhang Yifu asked directly.

"The microcomputer part, the principle algorithm. Chen Yanrui shook his head helplessly, "We have just figured out the traditional relay, and the integrated circuit has just begun to be studied, and the result has been computerized. ”

"Will this algorithm be very complicated?" Chang Jiang asked on the side, "I have been engaged in automation for so many years, if I have to be careful, there are indeed many complex algorithms in the field of power grids, but relay insurance only focuses on a single power equipment, right? How complex can it be? Accurate A/D conversion and I/O interface is the difficulty, right?"

"A/D and I/O have ready-made chips to use, but the difficulty is that the principle is ...... by software algorithms according to different hardware conditions."

"There is also such work in automation, which is nothing more than derivative algorithms, differential algorithms, and Fourier series!"

An old man and a young man argued about this, because the two have completely different majors, basically you and me, and no one cares what the other party is saying.

"Two, two. Zhang Yifu couldn't listen to it, and interrupted, "Let's just discuss the feasibility of independent research and development, let's not talk about the details, right?"

"If you don't talk about the details, how can you be feasive?" Chen Yanrui had already gone up, feeling that these two young people were really underestimating this thing.

"Come on, let's talk in parts. Zhang Yifu had already figured out his thoughts before he came, took out a pen and paper and pulled it up, "Generally speaking, it can be divided into two parts: software and hardware, right?"

"Of course. Chen Yanrui nodded.

"Let's talk about hardware first. Zhang Yifu continued to draw. "Electrical quantity acquisition, CPU, switching input and output, power supply, so it can be divided into four parts, right?"

"Barely yes. Chen Yanrui nodded again, "Core calculation." And the signal loop, the human-machine dialogue, etc., are all handled by the CPU, right?"

"That's right. Zhang Yifu then said, "Let's not discuss the power supply, it's not difficult, no problem, right?"

"No problem. ”

"Is there any objection to the direct purchase of mainstream models in the market for CPUs?"

Chang Jiang interjected: "Look at the cost requirements." ”

"Good. Zhang Yifu continued to draw the next part, "The switch is not much different from the traditional relay protection, if the other parts are done." Mr. Chen is completely aware of this, right?"

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

"Finally, the collection of chips is indeed more complicated, we have engaged in several mainstream market studies, respectively, experimental research, Changjiang itself has experience in this area, which is actually part of the automation of power plant operation. You're confident that you'll conquer it, right?"

"Of course, this is much more simplified than the number of power plants. Chang Jiang nodded.

"It's not over!" Zhang Yifu clapped his palms. "This thing can be done!"

Okay, now it's not just Chen Yanrui, Chang Jiang is in a cold sweat.

"Shaw...... You are the one who understands. Chen Yanrui sighed, "According to what you say, if you get iron lumps, you can build an airplane, and if you find uranium, you can blow up a nuclear bomb!"

"In the way!" Zhang Yifu smiled immediately. He took out a stack of thicker materials, "Why am I looking for you if I don't have a way?"

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

EPR-866A Line Microcomputer Protection Product Design Document

The two looked at each other, well, this grandson would never make trouble for no reason. Sure enough, I was prepared.

"Let me ask first, how is this model determined, and what does EPR mean?"

“Eternal-Power-Relay。 Zhang Yifu said a little embarrassedly, "I think you have to be formal, and if you are blind, you don't necessarily need this." ”

"Power is electricity, energy, Relay is relay, I know, what is Eternal?"

Zhang Yifu wanted to pretend to be forced, but in the end he felt that it was too contrived, and whispered secretly: "Eternal." ”

“…… All right. Chang Jiang swallowed and foamed, and finally picked up the materials and looked at them.

Chen Yanrui also picked up another copy, and said with the same curiosity: "What is the saying of 866A?"

"This just sounds comfortable, hairy!"

“…… All right. Chen Yanrui also immediately filtered this unreasonable model.

Zhang Yifu has no choice, he is not good to move the model abbreviations set by his predecessors, so that there is no doubt about the sense of disobedience, but the goods inside are genuine, which is almost the pioneering work of the first-class domestic manufacturers in the previous life.

Protection is divided into many categories, line protection, generator protection, transformer protection, reactor protection, capacitor protection, etc., because they have different characteristics in the event of a failure, and the electrical quantity changes also have their own characteristics, so the kernel algorithm is still a little different from each other.

Power lines can be seen everywhere, from the power poles scattered all over the residential areas of the city, to the outgoing towers of power plants and substations, and the towers of ultra-high voltage transmission lines. The higher the voltage of the line, the higher the line erected, the thicker the thicker, the transformer is used to convert between the various voltage levels, and the conversion is carried out, and there are many lines in each voltage level. Some people are about to ask, can't we unify one voltage? Why do we need to change it?

The reason is very simple, the electricity generated by the high-speed operation of the giant steam turbine is terrible, if this kind of electricity is directly transmitted to the residents' homes, this road will basically be ruined, not to mention the electrical appliances in the residents' homes, even the residential buildings will be a purgatory-like storage.

Therefore, the transformation of voltage is essential and complicated, like an irregular function graph. The electricity out of the generator is a voltage, the unified convergence to the power plant bus is a voltage, out of the power plant to the hub substation is another voltage, the transmission between large areas, in order to reduce transmission consumption, will use a higher voltage, to this point, this voltage is basically the end. At this time, the electricity is finally transmitted to the edge of the city, generally there will be one or several hub substations, in these substations, through the guò transformer to lower some voltage, input into the city backbone network, into the city of a certain district and then drop again, to your residential community door again, after the completion of multiple voltage reduction, it is basically the 220V we need in our lives.

Changing and changing, there are as many lines as there are lines to protect.

Of course, not every line is equipped with the highest relay device, and a considerable number of unimportant terminal lines of low voltage level are not much better than fuses.

But with the development of the times, advanced relay protection will be configured to every line. In the future, even most residential buildings will not need fuses, and the power supply company has been retrofitted with direct trip protection.

In this huge transmission line market, Hengdian can't catch up, but this huge microcomputer protection market still seems to have a lot of opportunities.

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

After doing a good job of this product, the follow-up generator protection, transformer protection, etc., are all the same, and the difficulty is definitely there, but it is by no means as complicated as starting from scratch now.

Before I knew it, half an hour had passed.

This time is different from the general concept given by Zhang Yifu every time, it is a thorough product design description, which is by no means as clear as the economizer drawings that Chang Siping showed back then, and 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 algorithm.

Even if everyone is from science and engineering, it is not an overnight thing to understand this series of judgments and algorithms, and after pondering for 40 minutes, Chang Jiang's head is finally about to explode.

"Shaw, have you studied mathematics?" he wiped his sweat and stared blankly at Shaw.

In fact, these algorithms will be required in future power system courses, and graduate students will also be involved in them at this time.

"I studied on my own a little, and this time I went to Japan to ask for advice. ”

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

"The ...... who went in his personal name" Zhang Yifu smiled reluctantly, "so this idea unfolded at once, hehe, hehe......"

"This is too ......," Chang Jiang clutched the materials in his hand, "This will have to be studied for half a month...... Give us time to understand. ”

Chen Yanrui simply asked, "Can I use it to discuss with others?" ”

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

The pirated version of the economizer has already given him a headache, and this time the microcomputer protection would rather progress slower than leak it out again.

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

"This, this is for them to see. Zhang Yifu immediately took out a slightly thinner material from his bag, "This is a simplified version, important details have been omitted, what you have in your hand is the complete version, pay attention to confidentiality." ”

"Are you ......" Chen Yanrui was completely stunned, "Did you go to Japan to investigate, or did you engage in commercial espionage?"

Chang Jiang laughed and said: "Mr. Chen, if he engages in espionage, he will definitely directly get the supercritical unit things back, and what kind of microcomputer protection!"

Zhang Yifu looked embarrassed, if he wanted to, it would not be so difficult to come up with some supercritical technology. (To be continued......)