Industrial enterprises own power grids usually consist of power generating equipment, transmission lines, substations, power distribution equipment, and so on. The power generating equipment generates electrical energy, which is transmitted through transmission lines to substations, where it is transformed and distributed, and then distributed by the distribution equipment to the various electrical load centres within the enterprise.
The evolution from the traditional electrical grid to the new smart grid introduces many challenges. One of these main challenges is the need for a good communication network to receive information and control the loads of each customer in real time. The most proven and robust solution for this is the use of Power Line Communication (PLC) technology that uses the grid as the communication medium. Here we discuss the technology and its evolution and compare the traditional narrow band single carrier FSK modulation with the new solutions based in OFDM which are known as PRIME and G3. The traditional electrical grid is changing. In the last century the electrical grid was a system designed to distribute the energy produced from a relatively small number of generation points to an enormous number of customers of different sizes in terms of usage. The criterion to design and to operate the grid was to transport the energy in an efficient way from the centres of generation to millions of customers. The capability to store energy in this system was very limited and therefore the capability to forecast the energy consumption was critical. The control of the grid was based on a daily forecast and the flow of the energy was from centres of production, via the transport grid, to the distribution grid. Most of the production was under the control of a regulator.
Now in some countries, and certainly more in the near future, the contribution of green energies to the electrical grid is a highly significant and important factor. The contribution of so-called green energies to the electrical grid is moving from 5% of hydroelectric production to nearly 40%, made up mainly of solar and wind energy. For the majority of this green energy the regulator normally has a limited control. Additionally, to compound the issue, the electrical vehicle (EV) is becoming a reality and will, for sure, change the scenario. The predicted massive deployment of EV will potentially double the energy consumption in the grid and will as a by-product introduce a large capability to store energy in a distributed structure. This predicted rise in energy consumption, the spreading of green and uncontrolled generation together with the storage capability of EV has been defined as the perfect storm' for the electric grid. The solution to this threat was defined as the smart grid. It is a combination of embedded intelligence and real time communication and control capability with enough capillarity to control and communicate to any of the millions or hundreds of millions of users in real time. To achieve this capability of communication it is necessary to actually utilize the electrical grid as the main communication medium using PLC technology.
The following brands of Power system dispatching products are shared for your reference and selection:
1.Schneider Quantum Series PLC Modules: In the self-supplied power grid of large factories, it can realise precise control and energy management of electrical equipment on production lines. Its abundant I/O modules can meet the demands for acquisition and control of different types of signals, such as analogue input modules for acquiring parameters such as motor current and voltage, and digital output modules for controlling the starting and stopping of equipment. In addition, through the industrial Ethernet communication module, it can be conveniently connected with the upper computer system of the factory to achieve automated monitoring of the production process and real-time analysis of energy data.
Related Product Category:
Control Processor Module
140CPU65260: Powerful enough to perform complex control logic, data processing and communication tasks. It supports a variety of communication protocols, such as Modbus, Profibus, EtherNet/IP, etc. It also has good memory and storage capacity, expansion capability and security features, and is suitable for large and complex control systems.
140CPU43412: With high processing power and reliability, it is suitable for industrial automation control occasions with high requirements on system performance, such as control of large-scale production equipment in the chemical and electric power industries.
140CPS11100: It can provide stable and reliable power supply for other devices and modules in the control system, with high security and stability to ensure the stable operation of the system, and is one of the basic modules for building the PLC system of Quantum series.
Analogue Input Module
140ACI04000: It can read external analogue signals, such as temperature, pressure, flow, etc. It is suitable for monitoring, control and data acquisition in industrial processes. The module has multiple analogue input channels, supports a variety of input signal types and ranges, and has high resolution and communication interfaces to meet the needs of different industrial scenarios.
Discrete Input/Output Modules
140DAI54000: With up to 16 input channels, it is mainly used for processing digital signals and can be widely used in various industrial automation and control systems.
140DDI85300: with high reliability and anti-interference ability, suitable for harsh industrial environments, it can accurately collect and transmit discrete input signals and provide accurate field data for control systems.
140DDO35301: It can stably output discrete control signals to drive various external devices, such as relays, contactors, solenoid valves, etc., to achieve precise control of industrial field equipment.
Ethernet Module
140CRP31200: It can realise Ethernet communication between PLC system and other devices, with RJ45 interface, supporting TCP/IP protocol, which can conveniently connect Quantum series PLCs to the industrial Ethernet, and realise remote monitoring, data transmission and interconnection between devices.
2.Honeywell Experion PKS Series DCS Modules: For captive grid scheduling and energy management in industrial parks. This series of process control modules can provide comprehensive monitoring and coordinated control of power generation, transmission and distribution equipment in the park to achieve optimal distribution and efficient use of energy. Its powerful engineering tool software can be easily configured and programmed to flexibly meet the needs of different parks in terms of grid structure and control strategy, while the reliability and security design of the system ensures the stable operation of industrial parks' power grids.
Related Product Category:
Control Processor Module
TK-PRR021: with powerful processing capability and rich communication interfaces, it can realise complex control strategies and high-speed data processing, and is suitable for large-scale, high-performance requirements of industrial automation control systems.
CC-PCNT01 51405046-175: Stable and reliable performance, supporting multi-tasking and parallel computing, capable of efficiently running a variety of control algorithms and applications, providing accurate control for industrial production processes.
Fault Tolerant Ethernet Bridge Module
TK-FTEB01 51309512-175: It can build a highly reliable redundant network to ensure the reliable transmission of data in the network, prevent the system from being paralysed due to network failure, and improve the availability and stability of the system.
FC-TPSU-2430: With power redundancy function, it can provide stable power supply for the Ethernet bridge module to further enhance the reliability of the system.
Control Network Interface Module
FC-DCOM-232/485: Supporting a variety of communication protocols, it can realise serial communication with different devices and facilitate data interaction with field instruments, sensors and other devices.
FC-TSAI-1620M: Provides multiple analogue input channels, capable of collecting various analogue signals on site, such as temperature, pressure, flow, etc., to achieve real-time monitoring of industrial process parameters.
I/O Link Interface Module
TC-IAH16I: With 16 analogue input channels, it can receive 4-20mA or 0-10V analogue signals from on-site sensors, and is suitable for analogue data acquisition of various industrial processes.
TC-OAV081: With 8 analogue output channels, it can output 4-20mA or 0-10V analogue signals, which can be used for controlling control valves, inverters and other actuators.
PM I/O Card
TK-IOLI01 51403427-275: It provides flexible I/O configuration, and different input/output types and points can be selected according to the actual needs to meet the control requirements of various industrial sites.
CC-TAIX01 51308363-175: With good anti-interference ability, it can work stably in harsh industrial environments and ensure the accurate transmission of I/O signals.
Power Module
S7800A1142: Adopting advanced technology, it can efficiently and stably supply power to the system, can withstand extreme working conditions such as high and low temperatures, and has strong compatibility, compact structure, and is easy to install and maintain.
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