CN116667534A - Intelligent distribution box system - Google Patents

Abstract

The embodiment of the specification provides an intelligent distribution box system, wherein the method comprises the following steps: the control module is used for setting input and output current limit values and rated power output limit values of all paths according to local or remote parameter input of a user, setting power supply priority of all paths of output, and carrying out load power control in a self-adaptive manner when the power is insufficient so as to meet the electric power of an important load; the modularized electric energy converter is used for realizing one-path alternating current/direct current input and multiple-path alternating current/direct current output according to configuration information, automatically selecting and switching input and output paths, and adapting to a required alternating current/direct current power supply mode.

Description

Intelligent distribution box system

technical field

This document relates to the field of electrical technology, in particular to an intelligent distribution box system.

Background technique

In application scenarios such as military field power supply, field emergency communication, and remote area exploration, it is usually necessary to access the available power grid for emergency power supply. The voltage fluctuation range is large under load conditions. The tripping current of the circuit breaker in the traditional distribution box is fixed, and it is very easy to trip for protection when the voltage is insufficient and the load power is large, and the load power cannot be adjusted and limited in real time according to the application conditions. On the other hand, when power is supplied over a distance of several kilometers, the use of a DC transmission method with a higher voltage level has obvious advantages in reducing loss, cable diameter and weight.

At present, most smart distribution boxes focus on solving the problems of voltage or current information collection, remote control of opening or closing, etc., and do not have functions such as power control and load priority setting.

Contents of the invention

The object of the present invention is to provide an intelligent distribution box system to solve the above-mentioned problems in the prior art.

The present invention provides an intelligent distribution box system, including:

The control module is used to set the input and output current limit values and the output limit values of each rated power according to the user's local or remote parameter input, set the power supply priority of each output, obtain configuration information, and perform self-adaptive power for multiple outputs. control;

The modular power converter is used to realize one AC/DC input and multiple AC and DC outputs according to the configuration information, and automatically select and switch the required power supply path.

By adopting the embodiment of the present invention, it can not only automatically identify AC and DC mode inputs, realize power supply and power distribution functions of various standards, but also control and stabilize power supply for loads in extreme cases, and automatically and intelligently limit loads according to the order of load priority. Power to ensure continuous and reliable work of important loads.

Description of drawings

In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, in the following description The accompanying drawings are only some embodiments described in this specification, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the schematic diagram of the intelligent distribution box system of the embodiment of the present invention;

Fig. 2 is a schematic diagram of the input and output channel connector of the intelligent distribution box according to the embodiment of the present invention;

Fig. 3 is a schematic front view of an intelligent distribution box according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of the key components of the intelligent distribution box according to the embodiment of the present invention;

Fig. 5 is a schematic diagram of an independent working mode of a single distribution box according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of long-distance power supply and distribution of multiple distribution boxes according to an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the following will describe the technical solutions in one or more embodiments of this specification in conjunction with the drawings in one or more embodiments of this specification The technical solution is clearly and completely described, and obviously, the described embodiments are only a part of the embodiments in this specification, rather than all the embodiments. Based on one or more embodiments in this specification, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this document.

According to an embodiment of the present invention, an intelligent distribution box system is provided. FIG. 1 is a schematic diagram of the intelligent distribution box system according to an embodiment of the present invention. As shown in FIG. 1 , the intelligent distribution box system according to an embodiment of the present invention includes The power distribution box 14 also includes:

The control module 10 is used to set input and output current limit values and output limit values of each rated power according to the user's local or remote parameter input, set the power supply priority of each output, obtain configuration information, and perform self-adaptation on multiple outputs Power control; the control module 10 is specifically used for:

Collect voltage, current and power information, store the collected information in the local database or upload to the remote network, provide PC or mobile terminal APP access interface, display the collected information and configuration information to it in real time through the access interface, provide Configuration interface for configuration information.

The modular electric energy converter 12 is used to realize one AC/DC input and multiple AC and DC outputs according to configuration information, and automatically select and switch required power supply paths. The modular electric energy converter 12 specifically includes: an AC-DC module and a DC-AC module connected in a plug-and-play manner.

The modular electric energy converter 12 is specifically used to: configure 220V AC output or 600-1000V high-voltage DC output on different output channels according to load requirements. When the distance of the back-end load of the intelligent distribution box system is less than the distance threshold and the cable length is less than the length threshold, the load is connected to the AC 220V channel of the intelligent distribution box system; when the distance of the back-end load is greater than or equal to the distance threshold, connect the load to the high-voltage DC output channel of the smart distribution box.

In addition, the modular electric energy converter connects the input and output interfaces with the AC-DC module and the DC-AC module through a matrix type SSPC, so as to realize AC-DC matching and series-parallel combination. Specifically, the SSPC matrix switches and selects the corresponding input, output, and intermediate paths according to the voltage and current detection results and configuration settings: the input SSPC matrix automatically selects the corresponding AC-DC or directly to the intermediate SSPC according to the AC or DC connected to the input terminal Matrix, the middle SSPC matrix enables the corresponding DC-AC or directly sends it to the output SSPC matrix according to the configured output AC or DC channel. The middle and output SSPC can also be connected as multi-module parallel mode according to the preset power level.

In the embodiment of the present invention, there may be multiple modular electric energy converters 12 .

The modular power converter 12 is further used for: flexibly combining and interconnecting multiple modular power converters, and performing automatic detection and matching, automatically detecting the input AC/DC voltage form and voltage range, and converting from multiple modular power converters Select the appropriate output channel in the converter.

The distribution box 14 specifically includes: an input connector, a casing, a pluggable modular power converter module interface, and an output connection cable.

Through key components such as modular power electronic converters and intelligent control circuits, multiple channels of 600V-1000V high-voltage DC and 220V AC power distribution combined output are realized. The number of output channels and the voltage of each channel can be configured, and the controllable degree of freedom is high. It has the functions of multi-channel output power automatic limiter, input current limit, output short circuit protection, AC and DC leakage protection, etc. Through the on-site parameter setting, real-time control and adjustment of the power supply power of multiple outputs can be completed, and the priority order of power supply for different loads can be realized. In application scenarios such as military field power supply, field emergency communication, and remote area exploration, when the traditional distribution box is overloaded or the grid voltage drops, it is easy to cause the circuit breaker at this level and the front end to trip, which is not convenient for maintenance and management. Even when the front-end power supply capacity is insufficient, the intelligent distribution box can still ensure the priority load work in the intelligent distribution box. It has good adaptability to the capacity configuration of the existing front-end open spaces of different specifications, and can enhance the toughness and flexibility of the power supply system. sex.

The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

The embodiment of the present invention provides an intelligent power distribution box system composed of a power electronic converter and a digital controller. Through a modular power converter, one AC input and multiple AC and DC outputs are realized. In the control system and the proposed control Under the method, the limit value of input and output current and the limit value of each rated power output can be flexibly set, and the power supply priority of each output can be freely set. Among them, the intelligent distribution box contains two key AC-DC and DC-AC power conversion modules, which adopt a modular structure and are connected in a plug-and-play manner. It can be configured as 220V AC output or 600-1000V high voltage DC output on different output channels according to load requirements.

When the back-end load of the smart distribution box is close and the cable length is short, it is connected to the AC 220V channel of the smart distribution box; when the back-end load is far away, the voltage drop and loss of the cable are large. The load is connected to the high-voltage DC output channel of the intelligent distribution box. Multiple intelligent distribution boxes have flexible combination interconnection and automatic detection and matching functions, which can automatically detect the input AC/DC voltage form and voltage range, so as to select the appropriate output channel; through the internal digital controller and communication module of the intelligent distribution box , according to the needs, multiple modules can be connected in parallel to expand the output power, and the real-time monitoring and parameter configuration of electrical parameters can be performed on the local screen and remote software.

The technical solution of the embodiment of the present invention has AC and DC power distribution and power limiting functions, and can set a power distribution box with load power supply priority, and the system can adaptively switch working modes according to the setting and environmental conditions.

It can be seen from the above description that the system is composed of a power distribution box, a modular AC-DC converter, control and communication components, and connecting cables. The composition structure and working mode are as follows:

(1) The power distribution box includes input connectors, casings, pluggable AC-DC/DC-AC modules, output connection cables and other components.

(2) The power distribution box can be connected to single-phase or three-phase AC power. The sampling and control circuit automatically collects voltage and current, judges the voltage system and voltage level, and selects the corresponding output channel.

(3) The built-in control software collects voltage, current and power information, stores the information in the local database or uploads it to the remote network, and can access and display the collected information and configuration information in real time through PC or mobile phone APP, and perform power limit, load Priority and other configuration modifications.

Figure 2 is a schematic diagram of the input and output channel connectors on the back of the intelligent power distribution box, which supports one AC or DC input, and can be distributed to multiple outputs at the output end as required. The figure shows 5 AC outputs and 5 DC outputs The schematic diagram of the corresponding circular connector can also use the direct output mode of the terminal according to the application scenario.

Figure 3 is a schematic diagram of the front appearance of the intelligent distribution box. The core components are the AC-DC module and the DC-AC module, which mainly complete the mutual conversion between AC and DC. Connect the input and output interfaces with the AC-DC module and DC-AC module through the matrix SSPC to realize AC-DC matching and series-parallel combination.

Figure 4 is a schematic diagram of the internal structure of the intelligent distribution box. AC-DC, DC-AC and SSPC constitute its main components. The SSPC matrix switches and selects the corresponding input, output and intermediate channels according to the voltage and current detection results and configuration settings. : The input SSPC matrix automatically selects the corresponding AC-DC or directly to the middle SSPC matrix according to the AC or DC connected to the input terminal, and the middle SSPC matrix enables the corresponding DC-AC or directly sends to the output SSPC according to the configured output AC or DC channel The matrix, intermediate and output SSPCs can also be connected as multi-module parallel mode according to the preset power level, so as to enhance the power output capability of the specified channel.

In Figure 5, when a single power distribution box works independently, the input current of AC-DC and the output current of DC-AC are limited by the preset value of the controller to realize power limitation; it can be set locally or wirelessly Network and APP software modify the limit value. During the peak period of power consumption, the front-end AC input voltage is low, and the inlet current will increase even if the load power remains unchanged. The traditional power distribution box inlet protection circuit breaker is easy to trip, which affects the stable power supply of important loads. However, in Figure 5, the input current limiting function of the intelligent distribution box can better limit the total power of the distribution box from the AC line to prevent the front end from tripping and disconnecting. At the same time, when the power is limited, AC output 1 and AC output 2 have different priorities. The output power limit function can limit the power sent to secondary loads, and focus on supplying power to important loads to ensure the stability of key loads.

Figure 6 shows the interconnected working mode of multiple distribution boxes. The AC-DC component of distribution box 1 outputs DC 600-1000V high voltage, and transmits power through long-distance long cables. The main working components of remote distribution box 2 are DC- In the AC part, a stable 220V AC output is obtained. This method reduces the loss of the transmission line, and reduces the cable diameter and cost.

Embodiments of the present invention have the following advantages:

1. Strong compatibility. Compatible with single-phase, three-phase, AC, DC and other power supply and distribution systems.

2. Multifunctional. It realizes the functions of power distribution, power restriction, visual display of voltage and current, and remote power distribution control.

3. The strategy can be customized. Through software integration, load power supply protection can be implemented according to the default channel priority, and the policy can also be modified by the user in real time.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. An intelligent block terminal system, its characterized in that includes the block terminal body, still includes:

the control module is used for setting input and output current limit values and rated power output limit values of each path according to local or remote parameter input of a user, setting power supply priority of each path of output, acquiring configuration information and carrying out self-adaptive power control on multiple paths of output;

the modularized power converter is used for realizing one-path alternating current/direct current input and multiple-path alternating current and direct current output according to the configuration information and automatically selecting and switching the power supply paths required.

2. The system of claim 1, wherein the modular power converter comprises: an AC-DC module and a DC-AC module accessed in a plug-and-play mode.

3. The system of claim 1, wherein the modular power converter is specifically configured to: the alternating current output of 220V or the high voltage direct current output of 600-1000V is configured on different output channels according to the load requirement.

4. The system of claim 3, wherein the modular power converter is specifically configured to: when the rear load distance of the intelligent distribution box system is smaller than the distance threshold value and the cable length is smaller than the length threshold value, the load is connected to an alternating current 220V channel of the intelligent distribution box system; and when the distance between the rear end load and the intelligent distribution box is greater than or equal to the distance threshold value, the load is connected to a high-voltage direct-current output channel of the intelligent distribution box.

5. The system of claim 1, wherein the modular power converter is a plurality of.

6. The system of claim 5, wherein the modular power converter is further configured to: and flexibly combining and interconnecting the plurality of modularized power converters, automatically detecting and matching, automatically detecting the input alternating current/direct current voltage form and voltage range, and selecting an adaptive output channel from the plurality of modularized power converters.

7. The system according to claim 1, wherein the distribution box comprises in particular: the power supply comprises an input connector, a shell, a pluggable modular power converter module interface and an output connecting cable.

8. The system according to claim 1, wherein the control module is specifically configured to:

collecting voltage, current and power information, storing the collected information in a local database or uploading the collected information to a remote network, providing a PC or mobile terminal APP access interface, displaying the collected information and configuration information to the user through the access interface, and providing a configuration interface of the configuration information.

9. The system of claim 2, wherein the modular power converter is specifically configured to: the matrix SSPC is used for connecting the input/output interface with the AC-DC module and the DC-AC module, so that the AC-DC matching and the serial-parallel combination are realized.

10. The system of claim 9, wherein the modular power converter is specifically configured to:

the SSPC matrix switches and selects corresponding input, output and intermediate channels according to the voltage and current detection result and configuration setting: the input SSPC matrix automatically selects corresponding AC-DC or directly to the middle SSPC matrix according to the AC or DC connected with the input end, the middle SSPC matrix enables corresponding DC-AC or directly to the output SSPC matrix according to the configured output AC or DC channel, and the middle and output SSPC can be connected into a multi-module parallel mode according to the preset power size.