Intelligent electronic device with enhanced power quality monitoring and communication capabilities
First Claim
1. An intelligent electronic device (IED) for recording at least one waveform of an AC power system, the IED comprising:
- a voltage input circuit operative to sense line voltage from the AC power system and generate at least one voltage signal representative of the voltage sensed from the AC power system;
at least one analog-to-digital converter circuit configured to sample the at least one voltage signal to output digital samples representative of said voltage input circuit;
at least one processor operatively coupled to said analog-to-digital converter and configured to perform at least one mathematical computation on samples received from the analog-to-digital converter; and
at least one volatile memory operatively coupled to said at least one processor to receive samples from the analog-to-digital converter;
wherein the at least one processor is configured to trigger a recording and storing in non-volatile memory at least one of said digital samples based on an algorithm that includes at least one of an adaptive trigger, a waveshape trigger and a rate of change trigger.
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Accused Products
Abstract
An intelligent electronic device (IED) has enhanced power quality and communications capabilities. The power meter can perform energy analysis by waveform capture, detect transient on the front end voltage input channels and provide revenue measurements. The power meter splits and distributes the front end input channels into separate circuits for scaling and processing by dedicated processors for specific applications by the power meter. Front end voltage input channels are split and distributed into separate circuits for transient detection, waveform capture analysis and revenue measurement, respectively. Front end current channels are split and distributed into separate circuits for waveform capture analysis and revenue measurement, respectively.
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Citations
28 Claims
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1. An intelligent electronic device (IED) for recording at least one waveform of an AC power system, the IED comprising:
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a voltage input circuit operative to sense line voltage from the AC power system and generate at least one voltage signal representative of the voltage sensed from the AC power system; at least one analog-to-digital converter circuit configured to sample the at least one voltage signal to output digital samples representative of said voltage input circuit; at least one processor operatively coupled to said analog-to-digital converter and configured to perform at least one mathematical computation on samples received from the analog-to-digital converter; and at least one volatile memory operatively coupled to said at least one processor to receive samples from the analog-to-digital converter; wherein the at least one processor is configured to trigger a recording and storing in non-volatile memory at least one of said digital samples based on an algorithm that includes at least one of an adaptive trigger, a waveshape trigger and a rate of change trigger. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An intelligent electronic device (IED) for recording at least one waveform of an AC power system, the IED comprising:
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a voltage input circuit operative to sense line voltage from the AC power system and generate at least one voltage signal representative of the voltage sensed from the AC power system; at least one analog-to-digital converter circuit configured to sample the at least one voltage signal to output digital samples representative of said voltage input circuit; at least one processor operatively coupled to said analog-to-digital converter and configured to perform at least one mathematical computation on samples received from the analog-to-digital converter; and at least one volatile memory operatively coupled to said at least one processor to receive samples from the analog-to-digital converter; wherein the at least one processor is configured to trigger a recording and storing in non-volatile memory at least one of said digital samples based on an algorithm that includes at least one of an adaptive trigger wherein the adaptive trigger includes adjusting at least one trigger set point based on the preceding average voltage sensed. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for an intelligent electronic device (IED) to send data utilizing Simple Network Management Protocol (SNMP) and Modbus TCP, the system comprising:
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an SNMP agent; SNMP management software; a software system which communicates via Modbus TCP protocol; and the intelligent electronic device (IED) comprising; an Ethernet communication port located on the IED including at least one of a physical port and a wireless port; and a Modbus TCP protocol stack, wherein the IED can parse Modbus TCP requests coming from the software system. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. An intelligent electronic device (IED) including an anti-aliased waveform recording system, the waveform recording system comprising:
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a voltage input circuit operative to sense line voltage from the AC power system and generate at least one voltage signal representative of the voltage sensed from the AC power system; at least one analog-to-digital converter circuit configured to sample the at least one voltage signal to output digital samples representative of said voltage input circuit; at least one of a digital and analog anti-alias filter for filtering the samples above a predetermined set point; at least one processor operatively coupled to said analog-to-digital converter and configured to perform at least one mathematical computation on samples received from the analog-to-digital converter; and at least one volatile memory operatively coupled to said at least one processor to receive samples from the analog-to-digital converter. - View Dependent Claims (26, 27, 28)
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Specification