A detection method for smart electric energy meter dropped zero line
A technology of a smart electric energy meter and a detection method, which is applied in the direction of electrical connection test, measurement of electricity, measurement device, etc., can solve the problem of inability to configure the zero-line detection function and so on.
Active Publication Date: 2019-04-12
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In the current electric energy meter circuit, the three-phase voltage sampling resistor is a balanced load, so the circuit of these electric energy meters is not a circuit with a zero line detection function, and the zero line detection function cannot be configured.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail: Figure 1 to Figure 2 As shown, a method for detecting the zero line of a smart electric energy meter, including:
[0016] Step 1: Initialize the energy meter after power-on, and judge whether the zero line off flag is set. If it is set, it indicates that the zero line off event occurred before the energy meter was powered off. At this time, the zero line off event ends. start, go to step B;
[0017] Step 2: Open up three voltage caches for phases A, B, and C, three for each phase, to store voltage values per second;
[0018] Step 3: Power on the electric energy meter and run normally, detect the zero line event every second, judge the state mark of the zero line, if it is currently in the state of the zero line, then judge the end of the event of the In the zero line state, judge the start of the zero line event and go to step 4;
[001...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an intelligent electric energy meter zero line falling detection method, which comprises the steps of carrying out power-on initialization on an electric energy meter, and judging whether a zero line falling mark is arranged or not; if not, developing voltage caches of three phases A, B and C, wherein three caches are developed for each phase so as to be used for storing voltage values per second; then powering on the electric energy meter to operate normally, detecting a zero line falling event per second, judging a zero line falling state identifier, and judging termination of a zero line falling event if the electric energy meter stays at a zero line falling state at present; and judging beginning of the zero line falling event if the electric energy meter stays at a non zero line falling state. Compared with the prior art, the method disclosed by the invention is used for being compatible with a three-phase meter without a zero line falling detection function, and the function of zero line falling detection is realized with zero cost through simple hardware parameter adjustment and cooperation of a software algorithm.
Description
technical field [0001] The invention relates to a detection scheme related to a three-phase smart meter, in particular to a method for detecting a zero line drop of a smart electric energy meter. Background technique [0002] An electric energy meter is an instrument used to measure electric energy, also known as an electric meter, a fire meter, or a kilowatt-hour meter, and refers to an instrument for measuring various electrical quantities. [0003] The neutral line is the line drawn from the neutral point of the secondary side of the transformer, and forms a loop with the phase line to supply power to the electrical equipment. [0004] The current electric energy meter circuit, its three-phase voltage sampling resistor is a balanced load, so the circuit of these electric energy meters is not a circuit with the function of detecting the neutral line, and the detection function of the neutral line cannot be configured. Setting the neutral line detection function on the ele...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R22/06G01R31/04
CPCG01R22/066G01R22/068G01R31/66
Inventor 王运兵应碧锋叶金挺
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD