With the continuous development of smart grid construction in China, the number of system nodes will increase greatly, and the task of system scheduling will become more onerous. The monitoring, control, analysis and calculation of the large-scale and whole-process of the power grid will develop in a dynamic and on-line direction.
Power system unified time scale At present, both the power recording device and the billing device need to have a unified time-stamp information. Therefore, once a lack of unified time-stamp information will lead to the lack of supervision of the entire network dynamic behavior. For this reason, the development of GPS technology provides the necessary material conditions for the dynamic monitoring of the power system. The letter-synchronous clock system provides a unified time-marking reference for the main stations, sub-stations, and stations of the dispatching organizations at all levels, including the earth of the power system. Any point on the surface can receive time pulses with an accuracy of less than 1ps from the satellite. After the optical fiber communication system collects and measures the measurement data from each substation, the change in dynamic phasor between the substations can be obtained and the phase can be implemented accordingly. Quantity control.
Build a strong smart grid with UHV power grids as the backbone grid to provide guarantees for the efficient development of clean energy in China, and give full play to the role of the power grid in optimizing resource allocation and serving the national economy. It is comprehensive, coordinated, and sustainable for China's economy and society. Development has very important practical significance. Smart grid construction has become an important part of national economic and energy policies.
The real-time data of the EMS system EMS system comes from the data acquisition and monitoring system SCADA. EMS provides minute-level real-time data to real-time information system SIS, such as system frequency and total output. SCADA real-time data can be collected by RTU terminals set up on the plant side of the plant. The interface can usually be an asynchronous data interface Rs485 or Rs232. The amount of information required is generally 1200 bits/s to 9600 bits/s.
The SIS system real-time information system SIS mainly completes the processing of system operation data. The construction of instant messaging systems mainly uses Internet technology and is based on a secure Internet. The national power data network SPDnet is used as a communication infrastructure, and Internet is open to the public. . Since instant information systems are open to social information, they must be securely and securely isolated.
A major change in demand-side management smart grid is to directly target users. For a large number of end users, due to having a large number of nodes and a small amount of traffic, early adopters generally used wireless public network communication systems to achieve information transmission. At present, most of the mainstream technologies use public network leased lines GPRs or cDMAs to ensure the mastery of user conditions.
The TMRS system is under smart grid conditions. In addition to the conventional measurement functions, the electric energy metering system must also have the functions of cumulative storage and bi-directional metering over time. At the same time, the system also needs to have subsystems for automatic collection, remote transmission, storage, preprocessing, and statistical analysis of electrical energy data to support the future development of smart grids and the integration of new energy sources.
Power system unified time scale At present, both the power recording device and the billing device need to have a unified time-stamp information. Therefore, once a lack of unified time-stamp information will lead to the lack of supervision of the entire network dynamic behavior. For this reason, the development of GPS technology provides the necessary material conditions for the dynamic monitoring of the power system. The letter-synchronous clock system provides a unified time-marking reference for the main stations, sub-stations, and stations of the dispatching organizations at all levels, including the earth of the power system. Any point on the surface can receive time pulses with an accuracy of less than 1ps from the satellite. After the optical fiber communication system collects and measures the measurement data from each substation, the change in dynamic phasor between the substations can be obtained and the phase can be implemented accordingly. Quantity control.
Build a strong smart grid with UHV power grids as the backbone grid to provide guarantees for the efficient development of clean energy in China, and give full play to the role of the power grid in optimizing resource allocation and serving the national economy. It is comprehensive, coordinated, and sustainable for China's economy and society. Development has very important practical significance. Smart grid construction has become an important part of national economic and energy policies.
The real-time data of the EMS system EMS system comes from the data acquisition and monitoring system SCADA. EMS provides minute-level real-time data to real-time information system SIS, such as system frequency and total output. SCADA real-time data can be collected by RTU terminals set up on the plant side of the plant. The interface can usually be an asynchronous data interface Rs485 or Rs232. The amount of information required is generally 1200 bits/s to 9600 bits/s.
The SIS system real-time information system SIS mainly completes the processing of system operation data. The construction of instant messaging systems mainly uses Internet technology and is based on a secure Internet. The national power data network SPDnet is used as a communication infrastructure, and Internet is open to the public. . Since instant information systems are open to social information, they must be securely and securely isolated.
A major change in demand-side management smart grid is to directly target users. For a large number of end users, due to having a large number of nodes and a small amount of traffic, early adopters generally used wireless public network communication systems to achieve information transmission. At present, most of the mainstream technologies use public network leased lines GPRs or cDMAs to ensure the mastery of user conditions.
The TMRS system is under smart grid conditions. In addition to the conventional measurement functions, the electric energy metering system must also have the functions of cumulative storage and bi-directional metering over time. At the same time, the system also needs to have subsystems for automatic collection, remote transmission, storage, preprocessing, and statistical analysis of electrical energy data to support the future development of smart grids and the integration of new energy sources.
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