"So where is the key technology of this smart grid?" Gao Wenxin asked solemnly.

Fu Xin nodded and replied, "I think there are five main aspects. ”

"Oh?" Gao Wenxin looked very interested and asked, "What are the five major aspects?" Let's hear it. ”

Fu Xin didn't want to hide his secrets, and replied: "They are high-speed two-way communication systems, parameter measurement technology, equipment, advanced control technology and decision support technology. ”

"Go ahead and talk about it!" As Gao Wenxin's words fell, everyone in the small conference room pricked up their ears and waited for Fu Xin's explanation.

"Let's start with the two-way communication system. The establishment of high-speed, two-way, real-time, integrated communication system is the basis for the realization of smart grid, without such a communication system, the characteristics of any smart grid can not be realized, because the data acquisition, protection and control of smart grid need the support of such a communication system, so the establishment of such a communication system is the first step towards the smart grid.

At the same time, the communication system should go deep into thousands of households like the power grid, so that two closely linked networks -- the power grid and the communication network -- can only achieve the goals and main characteristics of the smart grid.

The relationship between the power grid and the communication network is that the high-speed, two-way, real-time, and integrated communication system makes the smart grid a dynamic, real-time information and power exchange interaction of large-scale infrastructure. When such a communication system is built, it can improve the reliability of power supply and asset utilization of the power grid, prosper the power market, and resist attacks on the power grid. This increases the value of the grid.

A high-speed two-way communication system has been built, and the smart grid can continuously self-monitor and correct. Apply advanced information technology to achieve its most important features. Self-healing features.

It can also monitor various disturbances, compensate, redistribute power flows, and avoid the expansion of accidents.

The high-speed two-way communication system enables a variety of intelligent electronic devices (IEDs), smart meters, control centers, power electronic controllers, protection systems and users to communicate in a networked manner, improving the ability to control the grid and the level of quality service.

There are two main areas of technology that need to be focused on in this technical field: one is the open communication architecture, which forms a 'plug-and-play' environment that enables networked communication between grid elements;

The second is a harmonized technical standard that enables seamless communication between all sensors, intelligent electronic devices (IEDs) and application systems. That is, the information can be fully understood between all these devices and systems, and the interoperability between devices and devices, between devices and systems, and between systems and systems can be realized.

This requires the cooperation of the power sector, equipment manufacturers and standard-setting bodies to achieve the interconnection of communication systems. ”

"This is one of the five key technologies of the smart grid high-speed two-way communication system?" Gao Wenxin asked thoughtfully.

Fu Xin nodded undeniably and clearly told Gao Wenxin and others that this is a brief description of the high-speed two-way communication system, one of the five key technologies of the smart grid.

"Then you move on to parametric measurement technology." Gao Wenxin frowned and said, Obviously, he hadn't digested the high-speed two-way communication system just now.

Although Fu Xin saw Gao Wenxin's situation, he didn't deliberately wait, these advanced things needed time to digest.

Fu Xin continued: "Parameter measurement technology is a basic component of smart grids. Advanced parametric measurement technology takes data and converts it into data information for use in all aspects of the smart grid.

They assess the health of grid equipment and the integrity of the grid, perform meter readings, eliminate electricity bill estimates, and prevent electricity theft, mitigate grid congestion, and communicate with consumers.

According to my calculations, the smart grid of the future will do away with all electromagnetic meters and their reading systems. Instead, there are smart solid-state meters that enable the power sector to communicate with users in both directions.

Microprocessor-based smart meters will have more functions, in addition to measuring the use and cost of electricity at different times of the day, as well as storing peak electricity price signals and tariffs issued by the power department. and inform the user what kind of rate policy to implement. More advanced features include the ability of the user to compile their own schedules according to the rate policy. Policies that automatically control the user's internal power usage.

For the power sector, parametric measurement technology provides more data support for power system operators and planners. Data including power factor, power quality, phase relationship (WAMS), equipment health and capability, meter damage, fault location, transformer and line load, temperature of critical components, outage confirmation, power consumption and forecasting, and more.

The new software system will collect, store, analyze and process this data for use by other operations in the power sector.

In the future, digital protection embedded in computer agents will greatly improve reliability. A computer agent is an autonomous and interactive adaptive software module. Wide-area monitoring systems, protection and control schemes will integrate digital protection, advanced communication technologies and computer agents.

In such an integrated, distributed protection system, the flexibility and adaptability of the protection elements to communicate with each other adaptively will greatly improve reliability, because even if some of the system fails, other protection elements with computer agents will still be able to protect the system. ”

"And then there's the equipment." Fu Xin saw that the two bigwigs did not ask questions, they were carefully digesting what he said, and did not stop him from saying it, so Fu Xin continued directly: "Smart grid should widely apply advanced equipment and technology to greatly improve the performance of the transmission and distribution system.

The devices in the smart grid of the future will be fully applied to the latest research results in materials, superconductivity, energy storage, power electronics and microelectronics to improve power density, power supply reliability and power quality, as well as the efficiency of power production.

In the future, smart grids will mainly apply advanced technologies in three aspects: power electronics technology, superconducting technology and large-capacity energy storage technology.

Improve power quality by adopting new technologies and finding the best balance between grid and load characteristics.

Improve grid transmission capacity and reliability by applying and retrofitting a wide range of advanced equipment, such as those based on power electronics and new conductor technologies.

Many new energy storage devices and power sources need to be introduced into the distribution system, while new network structures such as microgrids need to be utilized.

Economical FACTS devices will utilize low-cost power semiconductor devices that can be controlled more than existing semiconductor devices, allowing these advanced devices to be widely used.

Distributed generation will be widely used, and multiple units will be connected through communication systems to form a dispatchable virtual power plant.

Superconducting technology will be used in short-circuit current limiters, energy storage, low-loss rotating equipment, and low-loss cables. Advanced metering and communication technologies will enable the application of demand response. (To be continued......)