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High packing density of the ADCs allows more channels to be physically loaded on a PCB. This helps minimize the overall size, power consumption, and cost of the measurement systems.
Detecting power-grid shorts and opens is a primary function of many of these protection systems using ADCs. Detection is done by looking at the data coming from the ADC. Criteria for when to trip a relay are complex and highly proprietary to each monitoring system vendor. Nonetheless, it is generally agreed that it is as bad to trip in a false situation as it is not to trip in a fault situation.
Complicating the development and widespread adoption of these power-grid monitoring systems are the varying standards and agency requirements. Stringent specifications, such as the EN50160, IEC62053, and IEC61850 standards, dictate the precision energy measurement, the minimum accuracy, and sample rate needed for real-time power-delivery monitoring, fault-detection and protection, and dynamic load balancing. These standard requirements create clear criteria for the ADCs utilized in such a modern multichannel ADC system. Other factors, including effective input impedance (ZIN), signal-phase adjustment, and small package size, also influence ADC selection.
Today's high-performance, simultaneous-sampling ADCs are optimized for three-phase power (plus neutral) monitoring and measurement systems. These devices are a natural choice for high-density designs that need to provide high performance while reducing total system cost and minimizing board area.
*Future product—contact factory for availability.，Reduce System Cost for Advance
Small Package Size
In many power-grid monitoring applications, physical size matters. Often there is a need to monitor multiple polyphase supply lines, particularly in power-distribution centers. When examining the board area consumed by an ADC per-channel implementation, there are differences in the solutions available today. For example, the MAX11040 solution uses 15.9mm² per channel, which is less than half the area of solutions offered by other venders.High packing density of the ADCs allows more channels to be physically loaded on a PCB. This helps minimize the overall size, power consumption, and cost of the measurement systems.
Overvoltage Protection
The optimal system design must also prevent system failures from overloads or other line disturbances. The MAX11040 and other devices in its family have built-in overvoltage protection (similar to ESD protection) through the use of clamp diodes set for 6V and an internal logic circuit that sets a fault bit if high voltage is detected. Other ADC vendors have their own approaches, but external diode protection is typically used.Detecting power-grid shorts and opens is a primary function of many of these protection systems using ADCs. Detection is done by looking at the data coming from the ADC. Criteria for when to trip a relay are complex and highly proprietary to each monitoring system vendor. Nonetheless, it is generally agreed that it is as bad to trip in a false situation as it is not to trip in a fault situation.
Conclusion
Rising worldwide power demands are driving rapid investment in the power-delivery infrastructure or "smart grid." By integrating power-supply monitoring, dynamic load balancing, protection and metering functions, and advanced powerline monitoring systems, utility companies (and customers) can monitor, deliver, consume, and control grid power more efficiently.Complicating the development and widespread adoption of these power-grid monitoring systems are the varying standards and agency requirements. Stringent specifications, such as the EN50160, IEC62053, and IEC61850 standards, dictate the precision energy measurement, the minimum accuracy, and sample rate needed for real-time power-delivery monitoring, fault-detection and protection, and dynamic load balancing. These standard requirements create clear criteria for the ADCs utilized in such a modern multichannel ADC system. Other factors, including effective input impedance (ZIN), signal-phase adjustment, and small package size, also influence ADC selection.
Today's high-performance, simultaneous-sampling ADCs are optimized for three-phase power (plus neutral) monitoring and measurement systems. These devices are a natural choice for high-density designs that need to provide high performance while reducing total system cost and minimizing board area.
*Future product—contact factory for availability.，Reduce System Cost for Advance