CN110676927A

CN110676927A - Power supply scheduling device based on time sequence

Info

Publication number: CN110676927A
Application number: CN201910873192.XA
Authority: CN
Inventors: 施建伟; 陈利锋
Original assignee: Shanghai Lvpu Environmental Protection Technology Co Ltd
Current assignee: Shanghai Lvpu Environmental Protection Technology Co Ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-01-10
Anticipated expiration: 2039-09-16
Also published as: CN110676927B

Abstract

The application discloses power scheduling device based on time series includes: the two power supplies can alternately supply power through the switch control; the three temperature sensors are used for respectively monitoring the ambient temperature in real time and the temperatures of the two power supplies respectively; a timer for recording the accumulated working time of the current working power supply; and the scheduling module is used for scheduling the power supply by adopting a scheduling algorithm based on a time sequence. Two paths of power supplies are adopted, the working state of the power supplies is regarded as a time sequence, and a power supply scheduling scheme and the characteristics, the working time, the power supply temperature and the environment temperature of the power supplies are jointly used as the basis to judge whether the power supplies are switched at the current moment; the service life of the power supply is protected, the power supply overheating caused by continuous long-time work of a single power supply is prevented, the large loss caused by frequent switching of two power supplies is prevented, continuous power supply of the LED is achieved, and the effect of efficient scheduling is achieved.

Description

Power supply scheduling device based on time sequence

Technical Field

The application relates to the technical field of power supplies, in particular to a power supply scheduling device based on time series.

Background

The LED power supply is a kind of power supply, is a constant current source, and is widely used in various lamps (street lamps, LED lamps, etc.), displays, and the like. The requirements of two aspects are mainly met: the output voltage is larger than the electrifying voltage of the LED, the working current is stable and exceeds the rated current. The current novel power supply has many protection measures, such as overheat protection, overvoltage protection, short-circuit protection and the like.

The LED power supply is generally assembled by a driving chip and a common power supply (a direct current power supply or an alternating current power supply), the space is not large, so that heat dissipation is not easy, the temperature of the LED power supply is increased due to insufficient heat dissipation after the LED power supply continuously works for a long time, and the service life and the quality of the LED power supply are greatly influenced by high temperature. Since the working temperature and the service life of the capacitor determine the service life of the electrolytic capacitor used by the LED power supply, and the service life of the LED power supply depends on the service life of the electrolytic capacitor of the power supply, the working temperature is very important for prolonging the service life of the LED power supply.

The LED power supplies generate inrush currents when turned on and off, resulting in loss of switching contacts, and thus each power supply has a maximum number of on and off times. The number of switches also affects the life of the LED power supply.

Disclosure of Invention

The invention aims to manage the power supply through a scheduling algorithm based on a time sequence, so that the power supply achieves the aim of high efficiency and energy saving. Two power supplies are adopted, the two power supplies are mutually backup, the working state and the dormant state are switched according to a certain time sequence, one power supply is in working, the other power supply is in dormancy, and heat can be fully dissipated in the dormant process; the specific time point for switching the power supply is determined by the rule obtained by the temperature of the current power supply, the temperature of the current environment and the working time of the current power supply, so that the waste of high-frequency sampling can be avoided, and the heat of the power supply is dissipated.

In order to achieve the above object, the present application provides a power scheduling apparatus based on time series, comprising: the two power supplies can alternately supply power through the switch control; three temperature sensors respectively monitoring the ambient temperature and the temperature of the two power supplies in real time; a timer for recording the accumulated working time of the current working power supply; and the scheduling module is used for scheduling the power supply by adopting a scheduling algorithm based on a time sequence.

Optionally, the two power supplies work alternately to supply power continuously.

Optionally, the two power supplies switch between the working state and the sleep state according to a certain time sequence to achieve the complementary purpose.

Optionally, when one power supply is in a working state, the other power supply is in a dormant state, so that the heat of the other power supply is fully dissipated.

Optionally, a scheduling scheme is designed according to the temperature of the current working power supply, the ambient temperature and the working time of the current power supply by adopting a certain time sequence.

Optionally, the period of the two-way power switching is determined in a time sequence.

Two paths of power supplies are adopted, the working state of the power supplies is regarded as a time sequence, and a power supply scheduling scheme and the characteristics, the working time, the power supply temperature and the environment temperature of the power supplies are jointly used as the basis to judge whether the power supplies are switched at the current moment; the service life of the power supply is protected, the power supply overheating caused by continuous long-time work of a single power supply is prevented, the large loss caused by frequent switching of two power supplies is prevented, continuous power supply of the LED is achieved, and the effect of efficient scheduling is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

fig. 1 shows a flowchart of a power scheduling algorithm based on time series according to the present embodiment.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusions

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

According to an embodiment of the present invention, a power scheduling apparatus based on a time sequence is provided, which specifically includes: the two power supplies can alternately supply power through the switch control; three temperature sensors respectively monitoring the ambient temperature and the temperature of the two power supplies in real time; a timer for recording the accumulated working time of the current working power supply; and the scheduling module is used for scheduling the power supply by adopting a scheduling algorithm based on a time sequence. Two power supplies A, B are used to operate alternately. Setting a threshold value for each power supply, wherein Tmax represents the highest temperature which can be borne by the current working power supply, and the highest temperatures which can be borne by different power supplies are possibly different; m represents the optimal environment temperature when the current working power supply works, and the optimal environment temperature when different power supplies work may be different; g represents the relation between the current operating power supply operation time T and the power supply temperature T, and T is g (T). For two power supplies, the shortest working time is set to tmin manually, and the longest working time tmax is g (tmax).

The present invention regards the operating states of the two power supplies as a time sequence { xn }, where n denotes each time (n ═ 1, 2, …), and xn ═ a, B. For each type of power supply, the environmental temperature is controlled in a laboratory in advance, the current power supply temperature TS, the current environmental temperature TE and the working time length t of the current power supply are obtained by adopting a sampling value which is continuously obtained by a sensor and a timer at a certain time interval, and a relation function g is fitted through a function. An empirical function g of the power supply is obtained, g being related to the current power supply temperature TS, the current ambient temperature TE, and the time period t for which the current power supply has been operated, t being g (TS, TE, t).

The working state xn +1 of the power supply at the next moment is determined by the four factors of the current power supply temperature TS, the current environment temperature TE, the working time t of the current power supply and the current working power supply xn. If the working state of the power supply at the next moment is the same as the working state of the power supply at the moment (the working power supplies are the same, namely, all the working power supplies are A or all the working power supplies are B), the power supply is not switched, otherwise, the power supply is switched. The current power supply temperature TS, the current environment temperature TE and the working time length t of the current power supply are real-time observed values and are obtained by a sensor and a timer.

The scheduling rule of the time sequence in the invention is divided into two steps: as shown in fig. 1, this step may include: stage one: judging the relation between the working time t of the current power supply and the shortest working time tmin and the longest working time tmax, if t is less than tmin, the power supply is not switched, if t is greater than tmax, the power supply is directly switched, otherwise, the next step is carried out; and a second stage: and judging that the power supply is switched after the duration of x according to the current power supply temperature TS, the current environment temperature TE and the highest temperature Tmax which can be born by the current working power supply, wherein x is g (Tmax, TE, t) -g (TS, TE, t).

By combining the power scheduling device based on the time sequence of the embodiment, the invention adopts two power supplies, the working state of the power supply is regarded as the time sequence, and the power scheduling scheme and the characteristics, the working duration, the power temperature and the environment temperature of the power supply are taken as the basis together to judge whether the power supply should be switched at the current moment; the service life of the power supply is protected, the power supply overheating caused by continuous long-time work of a single power supply is prevented, the large loss caused by frequent switching of two power supplies is prevented, continuous power supply of the LED is achieved, and the effect of efficient scheduling is achieved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power scheduling apparatus based on time series, comprising: the two power supplies can alternately supply power through the switch control; the three temperature sensors are used for respectively monitoring the ambient temperature in real time and the temperatures of the two power supplies respectively; a timer for recording the accumulated working time of the current working power supply; and the scheduling module is used for scheduling the power supply by adopting a scheduling algorithm based on a time sequence.

2. The power scheduling device of claim 1 wherein the two power sources are alternately operated to provide power continuously.

3. The power scheduler of claim 1, wherein the two power sources switch between the active and the sleep states according to a time sequence to achieve complementary objectives.

4. The power scheduling device of claim 1 wherein when one power source is in an active state, the other power source is in a dormant state to dissipate heat sufficiently.

5. The power scheduling device of claim 1 wherein a scheduling scheme is designed according to the temperature of the current operating power supply, the ambient temperature, and the operating time of the current power supply.

6. The time-series based power scheduling apparatus of claim 1, wherein the period of the two-way power switching is determined in time series.