ADI Energy—Protective Relay Platform for Power Distribution Systems
●In the modern automatic power distribution system, more and more intelligent electronic devices are used to monitor the power quality and quickly isolate any fault from affecting the overall grid operation. The architecture of such devices is mostly composed of processor, multichannel ADC, signal condition circuit, power supply, and communication interfaces. Analog Devices, as the worldwide technical leader of mixed-signal processing, is the major electronic system solution supplier in this area.
●ADI’s expertise in integrated energy measurement—300 million ADI metrology-based meters deployed.
●Precision measurement of current and voltage through highly accurate converters and amplifiers.
●Enable robust and reliable power networks using high performance processing technology.
● 50% of all electrical grid equipment worldwide uses ADI converters.
●Mixed-signal conversion and processing enable ease of design and reduced time to market.
●Enable system cost reductions through innovation, with integration of features such as additional channel count and on-board amplifiers.
■Main Challenges and System Considerations
●Higher reliability and lower assembly/manufacturing costs.
●High signal dynamic range (up to 4000:1) and resolution (≥12 bits system ENOB) in some applications.
●Various requirements of system accuracy (protection up to 0.5%, measurement up to 0.1%).
●Multichannel (simultaneously as optional).
● Real-time processing (10 ms, 20 ms for all channels).
●System level connectivity: RS-232, RS-485, Ethernet, CAN, USB. In most cases, the communication interfaces also require isolation (≥ 500 V).
●Robustness requirements such as overvoltage protection, EMC/EMI, industry operation temperature range, long lifetime.
●To develop a low voltage device, the designer usually needs to consider different system requirements, including dynamic range, accuracy, bandwidth, channels, isolation, real-time processing, cost, and robustness
■Typical Distribution System Categories
●Low voltage system: <35 kV, including 10 kV, 6 kV, 3 kV.
●Ultralow voltage system: 1 kV, 380 V, 220 V
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OP2177 、 OP4177 、 AD8672 、 AD8674 、 ADA4077-2 、 AD8608 、 ADCAD7606 、 AD8602 、 AD8604 、 AD7607 、 AD7658-1 、 AD7689 、 AD7490 、 AD7327 、 ADE7878 、 ADR421 、 ADR431 、 ADR3425 、 ADSP-BF51x 、 ADSP-21469 、 ADuM5000 、 ADuM141xD 、 ADM487E 、 ACAD5422 、 ADM2587E 、 ADM3251E 、 ADM3053 、 ADuM4160 、 ADP125 、 ADP1612 、 ADP2301 、 ADP5034 、 AD8618 、 AD8666 、 ADSP-BF506F 、 ADuC702x 、 ADM6710 、 ADuM141x 、 AD5422 、 ADM3251 、 AD7699 、 AD7606 、 ADuM6000 、 ADuM2587E 、 ADSP-BF518 |
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