Dynamic error testing method and device for intelligent ammeter
A smart energy meter, dynamic error technology, applied in measuring devices, measuring electrical variables, instruments, etc., can solve problems such as errors
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
specific Embodiment approach 1
[0033] Specific implementation mode one: the following combination figure 1 This embodiment will be described. The method and device for testing the dynamic error of the smart electric energy meter described in this embodiment, which uses a synchronous circuit (1) of three-phase voltage and / or three-phase current to generate a synchronous pulse; the synchronous pulse is input into a synchronous pseudo-random sequence control signal generation circuit (2) , under the control of the pseudo-random sequence selection circuit (3), select a pseudo-random sequence output from a variety of pseudo-random sequences, and output the pseudo-random sequence to the dynamic load power control circuit (4) of the electric energy meter to generate pseudo-random changes Multi-mode dynamic load current and dynamic load power output, and generate steady-state voltage output. The input of the dynamic load power control circuit (4) of the electric energy meter is the steady-state voltage and steady-...
specific Embodiment approach 2
[0035] Specific implementation mode two: the following combination figure 1 Describe this embodiment, this embodiment is a further description of Embodiment 1, the synchronous pseudo-random sequence control signal s(t) described in this embodiment is:
[0036] s ( t ) = Σ k a ( k ) c ( t - kT )
[0037] In the formula, T is the period of the power frequency fundamental voltage or current; a(k) is a pseudo-random sequence with the value "1" or "0", k=0,1,2,3...belonging to the set N of natural numbers; c(t-kT) is the control signal level function:
[0038] V is the control level, the unit is volts.
[0039] The pseudo-random sequence is an M sequence, an m sequence, a truncated m sequence, a balanced Gold sequence, a Gold seq...
specific Embodiment approach 3
[0045] Embodiment 3: This embodiment is a further description of Embodiment 1 and Method 2. The method of accumulating the output power of the test electric energy meter dynamic load power control circuit (4) in this embodiment is as follows: when the electric energy meter under test is When the dynamic load current and power are input, the energy meter dynamic error test unit (5) measures the cumulative time when the synchronous pseudo-random sequence control signal a(k) is "1" between the set N output pulses of the measured energy meter T Σ (1), while measuring a(k) is "0" the cumulative time is T Σ (0); T Σ ( 1 ) = T 1 + T 3 + · · · + T 2 N - 1 ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com