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Non-intrusive identification method of non-variable frequency air conditioner based on second harmonic wave of current and reactive power

A non-inverter air conditioner and second harmonic technology, applied in the field of non-invasive identification, can solve the problems of staying in the theoretical research stage and achieve the effect of easy promotion and application

Active Publication Date: 2017-03-22
SUZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +1
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Problems solved by technology

At present, the research on NILMD technology is still in the theoretical research stage, and key technologies such as decomposition and identification methods for non-inverter air conditioners still need to be broken through

Method used

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  • Non-intrusive identification method of non-variable frequency air conditioner based on second harmonic wave of current and reactive power
  • Non-intrusive identification method of non-variable frequency air conditioner based on second harmonic wave of current and reactive power
  • Non-intrusive identification method of non-variable frequency air conditioner based on second harmonic wave of current and reactive power

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Embodiment 1

[0032] Embodiment 1: The main component of the air conditioner load is an asynchronous motor, so the load characteristics of the air conditioner are very similar to those of the asynchronous motor. In this paper, based on the air-conditioning characteristic test conducted in the power system dynamic simulation laboratory, a test platform for air-conditioning load is built, and the operation process of the air-conditioning load is analyzed in detail. Basically, they are all greater than 100Var; and accompanied by the second harmonic current, the magnitude is above 0.5A.

[0033] Based on the above research results, a non-intrusive identification method for non-inverter air conditioners based on current second harmonics and reactive power is proposed, which is used to non-intrusively identify whether a non-inverter air conditioner is started or not in the indoor power grid of a household. quit. as attached figure 1 As shown, the non-intrusive identification method of the non-i...

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Abstract

The invention relates to a non-intrusive identification method of a non-variable frequency air conditioner based on a second harmonic wave of current and reactive power. The method comprises the following steps of (1) sampling voltage and current of a main power supply incoming line of an indoor power grid to form a voltage sampling sequence and a current sampling sequence; (2) setting a time window, calculating real-time average reactive power and the second harmonic wave of the current, corresponding to the time window, of the main power supply incoming line according to the voltage sampling sequence and the current sampling sequence for forming a real-time average reactive power sequence and a second harmonic wave sequence of the current; and (3) judging whether the non-variable frequency air conditioner is started or exits or not in the indoor power grid according to the real-time average reactive power sequence and the second harmonic wave sequence of the current, and if not, returning to the step (2). Fast and accurate non-intrusive identification is carried out on starting and exiting of the non-variable frequency air conditioner on the basis of the second harmonic wave of the current and the reactive power, and the non-intrusive identification method has the advantages of being simple, economical and easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of intelligent electricity utilization, and relates to a non-invasive identification method for a non-inverter air conditioner. Background technique [0002] Residential power load monitoring and decomposition technology is an emerging smart grid basic support technology. Unlike the current smart meter that only measures the total power of users, it monitors and decomposes the start-up time, working status, and energy consumption of all electrical appliances in the household. As the goal, so as to achieve more reliable and accurate electric energy management. The power load monitoring and decomposition technology makes the user's electricity bill list like a telephone bill list, and the power consumption of various household appliances is clear at a glance, so that users can know their own electricity consumption in a timely manner, and provide a reasonable allocation of the electricity consumption time of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/14
CPCH02J3/14H02J2310/14Y02B70/30Y02B70/3225Y04S20/222Y04S20/242Y04S20/244
Inventor 张玮李洁沈杰周赣朱明杰
Owner SUZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER
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