Power distribution cabinet control system

Abstract

The invention relates to the field of power distribution cabinets, in particular to a power distribution cabinet control system, which comprises a power distribution cabinet body, a power supply module, a load module and a data acquisition module, wherein the power supply module consists of a constant power supply unit for constant power supply and a standby power supply unit for standby power supply; the data storage module is used for storing the collected information; under the condition that the standby power supply unit is connected to power supply, the method is used for marking the type of voltage fluctuation when it is judged that single voltage fluctuation does not meet preset standard according to the voltage fluctuation value of the standby power supply unit, and judging whether the connection of the standby power supply unit meets the standard or not according to the frequency of the voltage fluctuation in a preset period and the proportion of various voltage fluctuations The power distribution control module meets the preset standard, and the stability of the power distribution cabinet with the standby power supply access is improved.

Description

Technical Field

[0001] The present invention relates to the field of power distribution cabinets, and in particular to a power distribution cabinet control system. Background Art

[0002] A power distribution cabinet (PDC) is the final stage of a power distribution system, primarily responsible for the distribution, control, and protection of electrical energy. It distributes power from a circuit in the upper-level distribution equipment to the nearest load, while also providing protection, monitoring, and control for these loads. PDCs with dual or multiple power inputs are widely used in industries requiring high power stability. They play a crucial role in ensuring power supply continuity and improving electrical safety.

[0003] However, for distribution cabinets with dual or multiple power input capabilities, when the main power supply is insufficient or fails, the backup power supply can be automatically or manually switched, and it is powered by a separate backup power supply or auxiliary power supply. Therefore, how to effectively monitor and control the stability of the distribution line when the backup power supply or auxiliary power supply is in the state has become an urgent problem to be solved. Summary of the Invention

[0004] To this end, the present invention provides a power distribution cabinet control system to overcome the problem in the prior art that the power distribution cabinet with a backup power supply lacks effective monitoring and control, resulting in unstable power operation.

[0005] To achieve the above object, the present invention provides a power distribution cabinet control system, comprising: Power distribution cabinet, The power supply module is provided at the input end of the cabinet and includes a normal power supply unit for normal power supply and a backup power supply unit for backup power supply; A load module, connected to the power supply module, comprising a plurality of load units; a data acquisition module, which is connected to the power supply module and the load module respectively, and includes a first acquisition unit for acquiring voltage information of the backup power supply unit, a second acquisition unit for acquiring power supplied by the normal power supply unit, power supplied by the backup power supply unit, and load power of each load unit under normal operation, and a third acquisition unit provided inside the cabinet for acquiring light information; A data storage module, connected to the data acquisition module, for storing the acquired information; A power distribution control module is connected to the data acquisition module, the data storage module, the power supply module and the load module respectively. for determining the category of voltage fluctuation according to the duration of the single voltage fluctuation under the condition that the single voltage fluctuation does not meet the preset standard according to the voltage fluctuation value of the backup power supply unit, Used to determine whether the access of the backup power supply unit meets the preset standards based on the frequency of voltage fluctuations within a preset period and the proportion of various types of voltage fluctuations, and to determine the reasons for not meeting the preset standards based on the determination result that the access does not meet the preset standards, including the access power of the backup power supply unit not meeting the standards, or hardware failure.

[0006] Furthermore, in response to the power supplied by the normal power supply unit being less than the load power of the load module, the backup power supply unit starts to supply power to the load module.

[0007] Furthermore, the power distribution control module marks a single voltage fluctuation result in which the voltage fluctuation value is greater than a first preset voltage fluctuation value as a single voltage fluctuation.

[0008] Further, the power distribution control module responds to the voltage fluctuation value being greater than or equal to a second preset fluctuation threshold and less than a third preset fluctuation threshold and determines the category of the voltage fluctuation based on the duration of the single voltage fluctuation, and the power distribution control module responds to the voltage fluctuation value being greater than or equal to the third preset fluctuation threshold and marks the single voltage fluctuation as a type of voltage fluctuation.

[0009] Furthermore, the category of the voltage fluctuation is determined based on a comparison between the duration of a single voltage fluctuation and a preset duration threshold.

[0010] Furthermore, the power distribution control module determines a corresponding power distribution strategy based on a comparison between the access power of the backup power supply unit and the allowed access power threshold in response to the access power of the backup power supply unit not meeting the standard, and the power distribution control module verifies the location of the hardware fault based on the lighting information collected by the third collection unit stored in the data storage module in response to the condition of hardware failure.

[0011] Furthermore, the power distribution strategy includes increasing the power supply of the backup power supply unit and optimizing the power supply to the load module.

[0012] Furthermore, an increase in the power supply of the backup power supply unit is positively correlated with a power difference, and the power difference is a difference between the allowed access power threshold and the access power.

[0013] Furthermore, the method of optimizing power supply includes: supplying power to each load unit according to priority, or supplying power to each load unit according to load power, wherein the priority is based on the importance of each load unit.

[0014] Furthermore, the location of the hardware failure is a distribution line, or an electrical component, wherein the electrical component includes a circuit breaker, a contactor, a switch, and a relay.

[0015] Compared with the prior art, the beneficial effect of the present invention is that: under the condition that the backup power supply unit is connected to the power supply, the present invention determines whether the access of the backup power supply unit meets the preset standards by detecting the voltage fluctuation of the backup power supply unit within a preset period, thereby accurately determining the reason for non-compliance when it does not meet the preset standards, thereby realizing precise power distribution and troubleshooting.

[0016] Furthermore, the present invention accurately marks the category of a single fluctuation by the amplitude and duration of the voltage fluctuation, thereby determining the basis for determining the reason why the system operation does not meet the standards.

[0017] Furthermore, the present invention accurately defines the reasons why the backup power supply unit does not meet the preset standards by using the frequency of voltage fluctuations within a preset period and the proportion of various types of voltage fluctuations as a benchmark.

[0018] Furthermore, the present invention also provides a strategy for optimizing power supply when the access power of the backup power supply unit cannot be increased, thereby ensuring the stability of system operation.

[0019] Furthermore, the present invention verifies the location of the hardware fault by monitoring whether there is light fluctuation under a type of voltage fluctuation, thereby achieving accurate fault location. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a power distribution cabinet control system according to an embodiment of the present invention; Figure 2 A flowchart of an embodiment of the present invention for determining whether the connection of a backup power supply unit meets preset standards; Figure 3 A flow chart for determining a corresponding power distribution strategy for an embodiment of the present invention; Figure 4 This is a flow chart of optimizing the power supply mode according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0022] It should be pointed out that the data in this embodiment are obtained by comprehensive analysis and evaluation of the historical detection data of the power distribution control module of the present invention in the three months before this operation and the corresponding historical detection results. It can be understood by those skilled in the art that the system of the present invention can determine the above parameters for a single item by selecting the value with the highest proportion as the preset standard parameter based on the data distribution, using weighted summation to use the obtained value as the preset standard parameter, substituting each historical data into a specific formula and using the value obtained by the formula as the preset standard parameter or other selection methods, as long as the system of the present invention can clearly define the different specific situations in the single determination process through the obtained values.

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] See also Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown, they are respectively a structural schematic diagram of the distribution cabinet control system of an embodiment of the present invention; a flowchart of an embodiment of the present invention for determining whether the access of the backup power supply unit meets the preset standards; a flowchart of an embodiment of the present invention for determining the corresponding power distribution strategy; and a flowchart of an embodiment of the present invention for optimizing the power supply method.

[0025] An embodiment of the present invention provides a power distribution cabinet control system, including: Power distribution cabinet, The power supply module is provided at the input end of the cabinet and includes a normal power supply unit for normal power supply and a backup power supply unit for backup power supply; A load module, connected to the power supply module, comprising a plurality of load units; a data acquisition module, which is connected to the power supply module and the load module respectively, and includes a first acquisition unit for acquiring voltage information of the backup power supply unit, a second acquisition unit for acquiring power supplied by the normal power supply unit, power supplied by the backup power supply unit, and load power of each load unit under normal operation, and a third acquisition unit provided inside the cabinet for acquiring light information; A data storage module, connected to the data acquisition module, for storing the acquired information; The power distribution control module is respectively connected to the data acquisition module and the data storage module, and is used to mark the category of voltage fluctuation when a single voltage fluctuation does not meet the preset standard according to the voltage fluctuation value of the backup power supply unit under the condition that the backup power supply unit is connected to the power supply, and to determine whether the connection of the backup power supply unit meets the preset standard according to the frequency of voltage fluctuations within a preset period and the proportion of each type of voltage fluctuation.

[0026] Specifically, the permanent power supply unit, such as a main power supply, is not specifically limited and is used to power the load module; Specifically, the first acquisition unit, such as a voltage transformer, is not specifically limited and is used to measure voltage information of the backup power supply unit; Specifically, the second acquisition unit, such as a power acquisition instrument (not specifically limited), is used to collect power information of the power supply module and the load module.

[0027] Specifically, the third collection unit, such as a light intensity sensor (not specifically limited), is used to collect the light intensity inside the cabinet.

[0028] Specifically, the backup power supply unit responds to the fact that the power supply power of the normal power supply unit is less than the load power of the load module and starts to supply power to the load module, wherein the load power of the load module is the sum of the load powers of each load unit under normal operation. It can be understood that the way in which the backup power supply unit starts to supply power to the load module is compensatory power supply, that is, the normal power supply unit and the backup power supply unit jointly supply power to the load module.

[0029] Specifically, the power distribution control module determines whether a single voltage fluctuation meets a preset standard according to the voltage fluctuation value of the backup power supply unit under a first preset condition, wherein: A single voltage fluctuation of the backup power supply unit with a voltage fluctuation value greater than the first preset voltage fluctuation value of 22.00V is marked as a single voltage fluctuation. If the voltage fluctuation value of the backup power supply unit is greater than or equal to the first preset voltage fluctuation value and less than the second preset fluctuation threshold value of 45.50V, the power distribution control module determines that the single voltage fluctuation meets the preset standard and continues to monitor the voltage information of the backup power supply unit; If the voltage fluctuation value of the backup power supply unit is greater than or equal to the second preset fluctuation threshold and less than the third preset fluctuation threshold of 62.20V, the power distribution control module determines that the single voltage fluctuation does not meet the preset standard and determines the category of the voltage fluctuation according to the duration of the single voltage fluctuation; If the voltage fluctuation value of the backup power supply unit is greater than or equal to the third preset fluctuation threshold, the power distribution control module determines that the single voltage fluctuation does not meet the preset standard and marks the single voltage fluctuation as a type of voltage fluctuation; The first preset condition is that the backup power supply unit supplies power to the load module.

[0030] Specifically, the power distribution control module determines the category of a single voltage fluctuation according to the duration of the single voltage fluctuation, wherein: If the duration of the voltage fluctuation is less than the preset duration threshold of 35ms, the power distribution control module marks the single voltage fluctuation as a Class II voltage fluctuation; If the duration of the voltage fluctuation is greater than or equal to the preset duration threshold, the power distribution control module marks the single voltage fluctuation as a type of voltage fluctuation.

[0031] Specifically, the power distribution control module determines whether the access of the backup power supply unit meets the preset standard based on the frequency of voltage fluctuations and the proportion of various voltage fluctuations within a preset period of 1 hour, wherein: If the voltage fluctuation frequency is less than the preset voltage fluctuation frequency threshold of 16 times / h, the power distribution control module determines that the access of the backup power supply unit meets the preset standard and supplies power to the load module according to the current power supply mode; If the voltage fluctuation frequency is greater than or equal to the preset voltage fluctuation frequency threshold of 16 times / h and the second-category voltage fluctuation ratio is greater than the category voltage fluctuation ratio threshold of 55%, the power distribution control module determines that the access of the backup power supply unit does not meet the preset standard and the reason for not meeting the preset standard is that the access power of the backup power supply unit does not meet the standard. The power distribution control module determines the corresponding power distribution strategy based on the comparison between the access power of the backup power supply unit and the allowed access power threshold; If the voltage fluctuation frequency is greater than or equal to the preset voltage fluctuation frequency threshold of 16 times / h and the proportion of the first type of voltage fluctuation is greater than the category voltage fluctuation proportion threshold of 55%, the power distribution control module determines that the access of the backup power supply unit does not meet the preset standards and the reason for not meeting the preset standards is a hardware failure. The power distribution control module verifies the location of the hardware failure based on the lighting information collected by the third collection unit stored in the data storage module.

[0032] Specifically, the power distribution control module determines the corresponding power distribution strategy based on the comparison between the access power of the backup power supply unit and the allowed access power threshold, wherein: If the access power is less than the allowed access power threshold, increasing the power supply of the backup power supply unit; If the access power is greater than or equal to the allowed access power threshold, the load module is powered on in an optimized manner.

[0033] Specifically, the power threshold allowed to be connected is determined based on the total power of the circuit breaker installed in the distribution cabinet and the power supply module connected to the distribution cabinet, for example, 36.5kW. There is no specific limit on the power threshold allowed to be connected. It only needs to meet the requirement that the corresponding power distribution strategy can be determined based on the power threshold allowed to be connected.

[0034] Specifically, the increase in the power supply power of the backup power supply unit is positively correlated with the power difference, and the power difference is the difference between the allowed access power threshold and the access power. It can be understood that the larger the power difference, the greater the increase in the power supply power of the backup power supply unit.

[0035] Specifically, the method of optimizing power supply includes: If the priorities of the load units are different, powering the load units according to their priorities; If the priorities of the load units are the same, supply power to the load units according to the load power; Specifically, the load power is sorted from high to low, that is, the load units with high load power are powered first.

[0036] Specifically, the priority is based on the importance ranking of each load unit. It can be understood that the importance can be ranked according to the specific usage of each load unit, and there is no specific limitation.

[0037] Specifically, the power distribution control module verifies the location of the hardware fault according to the illumination information collected by the third collection unit stored in the data storage module, wherein: If there is a light fluctuation under a voltage fluctuation, the power distribution control module verifies that the hardware fault is located in the distribution line. If there is no light fluctuation under the first type of voltage fluctuation, the power distribution control module verifies that the location of the hardware failure is an electrical component, wherein the electrical component includes a circuit breaker, a contactor, a switch, and a relay.

[0038] It is understandable that if a line spark occurs due to aging of the distribution line or overload of the load unit, the third acquisition unit detects a change in light intensity, and the power distribution control module marks a change in light intensity as a light fluctuation. By comparing the time-light fluctuation information and the time-type voltage fluctuation information stored in the data storage module, it is determined whether there is a light fluctuation under a type of voltage fluctuation.

[0039] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0040] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A power distribution cabinet control system, characterized in that: include: Power distribution cabinet, A power supply module, which is arranged at the input end of the cabinet, includes a normal power supply unit for normal power supply and a standby power supply unit for standby power supply; A load module, connected to the power supply module, comprising a plurality of load units; A data acquisition module, which is connected to the power supply module and the load module respectively, including a first acquisition unit for acquiring voltage information of the standby power supply unit, a second acquisition unit for acquiring power supply of the normal power supply unit, power supply of the standby power supply unit and load power of each load unit under normal operation, and a third acquisition unit arranged inside the cabinet for acquiring light information; A data storage module, connected to the data acquisition module, for storing the acquired information; a power distribution control module, which is connected to the data acquisition module, the data storage module, the power supply module and the load module respectively, for determining the type of voltage fluctuation according to the duration of the single voltage fluctuation under the condition that the single voltage fluctuation does not meet the preset standard according to the voltage fluctuation value of the backup power supply unit, Used to determine whether the access of the backup power supply unit meets the preset standards based on the frequency of voltage fluctuations within a preset period and the proportion of various types of voltage fluctuations, and to determine the reasons for not meeting the preset standards based on the determination result that the access does not meet the preset standards, including that the access power of the backup power supply unit does not meet the standards, or hardware failure.

2. The power distribution cabinet control system according to claim 1, characterized in that: In response to the power supply of the normal power supply unit being less than the load power of the load module, the backup power supply unit starts to supply power to the load module.

3. The power distribution cabinet control system according to claim 2, characterized in that: The power distribution control module marks a single voltage fluctuation result as a single voltage fluctuation according to the voltage fluctuation value being greater than the first preset voltage fluctuation value.

4. The power distribution cabinet control system according to claim 3, characterized in that: The power distribution control module responds to the voltage fluctuation value being greater than or equal to the second preset fluctuation threshold and less than the third preset fluctuation threshold and determines the category of the voltage fluctuation according to the duration of the single voltage fluctuation, and the power distribution control module responds to the voltage fluctuation value being greater than or equal to the third preset fluctuation threshold and marks the single voltage fluctuation as a type of voltage fluctuation.

5. The power distribution cabinet control system according to claim 4, characterized in that: The category of the voltage fluctuation is determined based on a comparison between the duration of a single voltage fluctuation and a preset duration threshold.

6. The power distribution cabinet control system according to claim 5, characterized in that: In response to the access power of the backup power supply unit not meeting the standard, the power distribution control module determines the corresponding power distribution strategy based on the comparison between the access power of the backup power supply unit and the allowed access power threshold. In response to the condition of hardware failure, the power distribution control module verifies the location of the hardware failure based on the lighting information collected by the third collection unit stored in the data storage module.

7. The power distribution cabinet control system according to claim 6, characterized in that: The power distribution strategy includes increasing the power supply of the backup power supply unit and optimizing the power supply to the load module.

8. The power distribution cabinet control system according to claim 7, characterized in that: The increase range of the power supply power of the backup power supply unit is positively correlated with the power difference value, and the power difference value is the difference between the allowed access power threshold and the access power.

9. The power distribution cabinet control system according to claim 8, characterized in that: The method of optimizing power supply includes: supplying power to each load unit according to a priority, or supplying power to each load unit according to a load power, wherein the priority is based on the order of importance of each load unit.

10. The power distribution cabinet control system according to claim 9, characterized in that: The location of the hardware failure is a distribution line, or an electrical component, wherein the electrical component includes a circuit breaker, a contactor, a switch, and a relay.

Images