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A digital factory refers to a new type of production organization that simulates, evaluates, and optimizes the entire production process based on relevant data throughout the product lifecycle in a computer virtual environment, and further extends to the entir...

Recently, Schneider Electric, a digital transformation expert in the field of global energy management and automation, officially signed a cooperation agreement with Shuimu Mingtuo (Damao) Hydrogen Energy Technology Co., Ltd. (hereinafter referred to as "Shuimu Mingtuo"). Schneider Electric will become the first digital solution provider in the industry to achieve power and process linkage, Collaborating with Shuimu Mingtuo to create a full process optimization business from green electricity to green hydrogen and then to green ammonia - the Electric Hydrogen Ammonia Dynamic Joint Simulation Project, to help accelerate China's green energy transformation. Xiong Yi, Senior Vice President of Schneider Electric, Head of Strategy and Business Development in China, and President of the Business Value Research Institute, as well as Fu Xiaolong, Vice President of Tsinghua Industrial Development Research Institute and General Manager of Shuimu Mingtuo in Beijing, signed an agreement on site on behalf of both parties. Frederick Godemel, Global Executive Vice President of Schneider Electric Systems and Services, Senior Vice President of Schneider Electric Xu Shaofeng, the person in charge of medium voltage and service business in China, attended the event and witnessed the signing of the contract.

With the deepening of the "dual carbon" goal, various fields are actively exploring the next generation of green energy technologies. As the "ultimate clean energy" of the 21st century, the development of green hydrogen has ushered in a trillion level trend. There is a close production and application relationship between green electricity and green hydrogen, so hydrogen, especially green hydrogen technology, is gradually entering the global decarbonization concept. However, the development of green electricity to produce green hydrogen and then convert it into synthetic ammonia faces multiple challenges such as the volatility of green electricity, the economy, safety, and reliability of green hydrogen. It is urgent to break through technological barriers through innovation and provide strong support for "zero carbon" development.

Fu Xiaolong, Vice President of Tsinghua Industrial Development Research Institute and General Manager of Shuimu Mingtuo, said, "The era of a new industrial system centered on new energy is coming soon.". The deep application of new energy and its hydrogen carriers in industrial systems can effectively solve the problems of efficient utilization of new energy and decarbonization of heavy industrial systems. However, its development also faces global technological challenges such as energy supply fluctuations and dynamic load changes brought by new energy to industrial systems.

According to the agreement between the two parties, Schneider Electric will leverage its rich experience in digital transformation in energy management and automation. Through joint simulation engineering research on the ETAP electrical system digital twin platform and AVEVA process simulation software, as well as analysis services of engineering and technical experts on working conditions, Schneider Electric will achieve the linkage of power and process flow, assist Shuimu Mingtuo in planning reasonable system configuration and control strategies, including energy storage (energy storage+hydrogen storage), thereby improving the safety, stability, and economy of the system, and ultimately achieve green and sustainable development. In addition, Schneider Electric will leverage its operational network resources in over 130 countries worldwide, advanced energy efficiency management technology, mature power and automation solutions, and collaborate with Shuimu Mingtuo's technology application capabilities and Mingtuo Hydrogen Group's hydrogen business capabilities to deepen cooperation in project development and overseas investment business, jointly promoting the continuous development of China and even the global green hydrogen industry.

Frederic Godemel, Global Executive Vice President of Schneider Electric's Systems and Services Business, said, "In the context of accelerating global energy transformation and China's' dual carbon 'goals, the development and application of green hydrogen technology is of great strategic significance. As a digital transformation expert in the global energy and power field, Schneider Electric has continuously launched green innovative products and overall solutions for many years, promoting global energy transformation.". This collaboration project is Schneider Electric's world's first full process optimization business from green electricity to green hydrogen and then to green ammonia. This heavyweight project has landed first in China, not only demonstrating the huge potential of China's renewable energy industry, but also recognizing Schneider Electric's cutting-edge exploration capabilities. In the future, we look forward to working together with industry leaders including Shuimu Mingtuo to explore more fields and provide stronger green momentum for low-carbon development in China and the world."

In the communication world of engineering machinery and equipment, there are four mainstream communication methods, each leading the way. They each have their own characteristics and are suitable for different scenarios and needs. Let's delve deeper into them together and see how to choose the most suitable communication method for your device!

Ethernet communication

Overview of features: High speed, stable like a rock, easy to handle large capacity data transmission. It is a powerful assistant for remote monitoring, big data processing, and device remote management.

Advantage explanation: With its excellent high-speed transmission capability and powerful remote control function, it has become the preferred choice for large-scale data transmission scenarios, such as real-time monitoring, big data processing, etc.

Limitation tip: Although powerful, there are certain requirements for hardware and network environment, which may not be applicable in all situations.

CAN communication

Overview of features: Real time response, outstanding anti-interference ability, and proficient in multi node communication. Splendid in the fields of vehicle control systems and industrial automation.

Advantage explanation: With real-time control and high stability, it has become the preferred solution for communication in complex environments.

Restriction prompt: The data transmission speed is relatively mild and not suitable for fast transmission of large-scale data.

RS232 communication

Overview of features: Classic peer-to-peer communication method, with a long history of application, suitable for close range communication. Commonly used as a bridge between computers and equipment, as well as traditional construction machinery and equipment.

Advantages: Simple and easy to understand, widely applicable, it is the default choice for many devices and systems.

Restriction prompt: The transmission speed and distance are relatively limited and not suitable for long-distance or high-speed communication needs.

RS485 communication

Overview of features: Multi point communication is effortless, anti-interference ability has reached a higher level, and skilled in medium and long-distance transmission. He is a skilled worker in industrial control systems and multi device communication.

Advantages: Not only can it achieve multi-point communication and networking functions, but it also has high anti-interference and long-distance transmission capabilities.

Restriction reminder: Although the speed is not the fastest, it is more suitable for long-distance communication needs compared to RS232.

How to make wise choices?

Data requirements are crucial. If your business requires a large amount of data transmission and high-speed communication support, Ethernet is undoubtedly your first choice;

Real time response cannot wait. For systems that require fast response and real-time control, CAN communication will be your reliable assistant;

Distance generates beauty, considering that RS485 communication distance is more suitable for long-distance communication needs, while RS232 can be chosen for point-to-point communication over short distances;

Environmental factors cannot be ignored, and interference and noise in the working environment may affect communication stability. Choosing a communication method with strong anti-interference ability will bring more reliable operation guarantee to your device;

The use of DCS process alarm classification control plays a crucial role in the safety of the site. According to relevant data surveys, the selection of alarms has a significant impact on the level of alarm safety factor. When using this technology, attention should be paid to the selection of alarms.

 

This article proposes several principles for selecting alarms through the study of different control systems, ensuring that alarms can fully play their role in the system.

 

The hierarchical control technology can ensure that alarms in different areas are independent. Different alarms are used for alarm monitoring in each area, which can ensure timely alarm in case of abnormal situations within the detection range to attract the attention of operators.

 

DCS process alarm classification control technology can effectively improve the safety of the operation site, effectively ensuring the safety of construction personnel and enterprises. This article is based on the concept and characteristics of DCS, and studies the application of toxic and harmful gas alarms and key operating parameter alarms, in order to provide reference for scholars in this field.

 

1. DCS multi-layer hierarchical control system

The basic design concept of DCS is to adopt the idea of decentralized control, centralized operation and management, and achieve a multi-level hierarchical control and cooperative structure. At present, it is mainly used in fields such as metallurgy, power, and petrochemicals.

 

DCS is a system that implements multi-layer hierarchical control, which has two basic hierarchical links during use: on-site control unit and operation station.

 

DCS basic grading process

● On site control unit:

A control system that is used near the site and is far away from the control center, and can monitor and control the site based on the DCS's own structure. The use of on-site control units requires the preparation of different devices, such as configuration plugins, which are configured according to the requirements of the system with corresponding central processing unit plugins, power plugins, and communication plugins, laying the foundation for later hierarchical control;

 

Redundancy configuration is one of the important links in hierarchical control systems, and during the configuration process, it is necessary to implement redundant configuration for host plugins, power plugins, and communication plugins; Implementing on-site hierarchical control and monitoring requires adding DCS to different hardware to ensure the reliability of hierarchical control.

 

● Operation station:

The operation station records and displays different data in the control system, which is a place for displaying human-computer interaction. Commonly used operation stations include host control, display devices, and keyboard input devices, which are mainly used for manual operation recording and feedback. It mainly realizes various important functions such as displaying different data, alarms, and operations.

 

2. Application of DCS process alarm classification control technology

 

Toxic and harmful gas alarm

Through the study of different DCS process alarm classification control technologies, it has been found that the DCS devices used in current on-site work mainly detect and alarm toxic, harmful, and flammable gases. When these gases are detected, an alarm will be triggered. The alarms on the market have diverse characteristics, and to ensure the normal operation of DCS, standardized alarms should be used.

 

In the process of selecting alarms, the following rules should be noted:

● It must be able to provide power supply for monitoring toxic and harmful gases and other connecting components;

 

●Being able to emit appropriate alarm signals after detecting toxic and harmful gases until someone discovers them, greatly improving the effectiveness of the alarm function;

 

●The range of combustible gas monitoring should be within the normal explosion range;

 

●Adapt to the concentration and measurement range of toxic and harmful gases, ensuring the detection of harmful gases within the normal range;

 

●Indicating alarm equipment is quite important and the key to determining whether it can alarm correctly. In the process of selection and purchase, alarm equipment with fire protection and interlocking protection functions should be selected;

 

●The alarm should have independent monitoring and alarm functions, ensuring that each alarm only monitors toxic and harmful gases within its scope of responsibility;

 

●The installed alarm should have a continuous alarm function. If toxic and harmful gas leaks are found during use, the alarm function should be activated. When the concentration decreases, the alarm also needs to continue to sound to ensure timely detection of toxic and harmful gas leaks.

 

Alarm is the key to alarm classification control technology. In the use of modern DCS process alarm classification control technology, responsible personnel can select and use alarms based on the above principles to ensure the safety and standardization of the control site.

 

Key operating parameter alarm

Each parameter in the DCS process alarm classification control technology using computer control systems needs to be strictly set and controlled. If the parameters are too high or too low, it will cause incalculable losses to the site. It is required to achieve the accuracy and standardization of alarm parameters through strict data analysis when setting alarm parameters.

 

When setting the alarm mode, a pop-up window or voice alarm can be used to effectively increase the attention of staff, provide the best solution time for staff, and avoid more serious accidents and losses.

 

Pop up alarm mode

When setting up pop-up alarms, the operator achieves the accuracy of the alarm process through on-site monitoring and control. The pop-up window should be set in the center position of the control display page, making it convenient for the staff to pay attention to the location of the alarm and the direction of the problem at the first time, providing more preparation time for the operator to effectively solve the problems that occur during the process;

 

● Voice alarm method

The use of voice alarm function requires staff to record the voice alarm in advance according to possible situations on site, and play the alarm information through the computer's voice output function.

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