Low-power-consumption AD data sampling method based on fault indicator

Abstract

The invention provides a low-power-consumption AD data sampling method based on a fault indicator. The method comprises the following steps: running a main program of the fault indicator and executing an initialization operation, switching to a hibernation mode after the initialization operation is completed, and turning off a sampling internal reference voltage; turning on an interrupt of a millisecond-grade timer, and executing a timed task of the timer; after execution of the timed task, starting AD sampling, at the same time starting the sampling internal reference voltage, and carrying out data sampling of the AD values of N sampling channels one by one, with N being a positive integer; and after completion of the data sampling, turning off the sampling internal reference voltage, and transmitting the sampled data in the hibernation mode. The method can ensure that a theoretical service life of the fault indicator is longer than 10 years, can effectively avoid line data collection loss, ensures that data can be collected in each cycle, and provides guarantee for product miniaturization.

Description

technical field

[0001] The invention relates to the field of electrical equipment, in particular to a low-power AD data sampling method based on a fault indicator. Background technique

[0002] As a kind of distribution automation terminal, the fault indicator has been applied in the State Grid and China Southern Power Grid. Due to the power consumption of the equipment, the equipment of most manufacturers cannot operate normally for a long time, which also leads to the failure of the fault indicator to accurately judge the fault of the distribution line.

[0003] At present, most domestic manufacturers mainly have the following two ways to solve the problem of the power supply of the fault indicator: one is to install a solar panel on the shell of the fault indicator to obtain power, and the other is to obtain power through the internal CT coil; but this Neither of the two ways of taking power can fundamentally solve the problem of the life of the fault indicator. The way ...

Examples

Embodiment Construction

[0023] see figure 1 As shown, a low-power AD data sampling method based on a fault indicator, specifically includes the following steps:

[0024] Step 1. Run the main program of the fault indicator to execute the initialization operation, and enter the sleep mode LPM3 after the initialization operation is completed. At this time, the power consumption of the fault indicator is above 400uA, and the internal reference voltage for sampling is turned off (during implementation, you can pass the instruction form to control the CPU to turn on or off the internal reference voltage); the internal reference voltage is a 2.5V reference voltage, after the 2.5V reference voltage is turned off, the power consumption of the fault indicator will be reduced to below 40uA.

[0025] Step 2, turn on the millisecond-level timer interrupt, and execute the timing task of the millisecond-level timer; the millisecond-level timer interrupt is a 15-millisecond timer interrupt. Since the frequency of my...

technical field

[0001] The invention relates to the field of electrical equipment, in particular to a low-power AD data sampling method based on a fault indicator. Background technique

[0002] As a kind of distribution automation terminal, the fault indicator has been applied in the State Grid and China Southern Power Grid. Due to the power consumption of the equipment, the equipment of most manufacturers cannot operate normally for a long time, which also leads to the failure of the fault indicator to accurately judge the fault of the distribution line.

[0003] At present, most domestic manufacturers mainly have the following two ways to solve the problem of the power supply of the fault indicator: one is to install a solar panel on the shell of the fault indicator to obtain power, and the other is to obtain power through the internal CT coil; but this Neither of the two ways of taking power can fundamentally solve the problem of the life of the fault indicator. The way ...

Examples

Embodiment Construction

[0023] see figure 1 As shown, a low-power AD data sampling method based on a fault indicator, specifically includes the following steps:

[0024] Step 1. Run the main program of the fault indicator to execute the initialization operation, and enter the sleep mode LPM3 after the initialization operation is completed. At this time, the power consumption of the fault indicator is above 400uA, and the internal reference voltage for sampling is turned off (during implementation, you can pass the instruction form to control the CPU to turn on or off the internal reference voltage); the internal reference voltage is a 2.5V reference voltage, after the 2.5V reference voltage is turned off, the power consumption of the fault indicator will be reduced to below 40uA.

[0025] Step 2, turn on the millisecond-level timer interrupt, and execute the timing task of the millisecond-level timer; the millisecond-level timer interrupt is a 15-millisecond timer interrupt. Since the frequency of my...

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