CN206323207U - Utilize photovoltaic charged distribution box cabinet uninterrupted power source - Google Patents

Abstract

The utility model provides an uninterruptible power supply for a power distribution cabinet utilizing photovoltaic charging, comprising: a power management module, the power management module is connected to a mains circuit; the power management module is also connected to a photovoltaic circuit, and the photovoltaic circuit is connected to The solar panel is connected; the power management module is connected with the intelligent terminal, the switch control mechanism and the communication module respectively; the power management module is connected with the switching power supply and the rechargeable battery pack respectively; a sampling judgment control module, the sampling judgment control module is connected to the mains power line and the photovoltaic line respectively; the sampling judgment control module is connected to the switching power supply and the battery pack respectively, and the switching power supply and the battery pack line are set on the adjustable switch, and the sampling judgment control module controls the switching power supply, Battery pack power switch. The power management module has the switching function of the charging channel, which can switch between the output of the switching power supply and the photovoltaic current, and the photovoltaic channel is preferred.

Description

Uninterruptible power supply for distribution cabinets using photovoltaic charging

technical field

The utility model relates to a power supply system for a distribution cabinet, in particular to an uninterruptible power supply for a distribution cabinet utilizing photovoltaic charging.

Background technique

The main equipment in the general low-voltage distribution cabinet includes intelligent terminal FTU, electric energy meter, electric controllable load switch and its operating mechanism, wireless module or carrier module or communication equipment such as optical fiber. These devices cooperate to complete: collect the current, voltage, power, electric energy and other operating data of the line; send the data to the distribution network dispatching center DSCADA indirectly or directly; remotely control the load switch through the dispatching center, input or Cut off the feeder line; can also complete the distribution network feeder automation FA and other functions.

These devices must ensure normal operation not only under normal power supply conditions, but also under power failure conditions, so as to complete the tasks of remote monitoring and switching. In particular, it must be able to control the switch through the switching of the backup power supply when there is no mains power after the failure, remove the fault section as soon as possible, and restore the normal power supply of residents.

Therefore, the power supply in the cabinet must have a power management system. The entire power supply has multiple inputs and multiple outputs, and intelligent switching is performed according to the situation to achieve the purpose of uninterrupted power supply. In addition, according to the characteristics of the backup battery, charge and discharge management is carried out to ensure that the battery activity does not decline for a long time and prolong the service life of the battery.

The general power distribution cabinet power supply, in the case of AC 220V power supply, is powered by AC 220V for switching power supply, and outputs 24V or 48V DC to the intelligent terminal DTU/FTU, switch control mechanism, etc., and simultaneously charges or floats the battery pack. ; When the AC 220V power is lost, it will switch to the battery power supply mode, and the battery will supply power to the intelligent terminal and the control mechanism. However, there is no installation of photovoltaic modules, power distribution cabinet power modules in the prior art.

Utility model content

The technical problem to be solved by the utility model is to overcome the problems existing in the prior art and provide an uninterruptible power supply for distribution cabinets utilizing photovoltaic charging.

In order to solve the problems referred to above, the technical scheme of the utility model is as follows:

The uninterruptible power supply of the distribution box and cabinet utilizing photovoltaic charging includes: a power management module, the power management module is connected to the mains line;

The power management module is also connected to a photovoltaic circuit, and the photovoltaic circuit is connected to the solar panel for charging the rechargeable battery pack;

The power management module is respectively connected with the intelligent terminal, the switch control mechanism and the communication module;

The power management module is respectively connected with the switching power supply and the rechargeable battery pack;

The inside of the power management module is provided with a sampling judgment control module, the sampling judgment control module is connected with the mains circuit; the sampling judgment control module is connected with the switching power supply and the battery pack respectively, and the switching power supply and the battery pack line are arranged on adjustable switches, and the sampling judgment control module is connected with the switching power supply and the battery pack. The judging control module controls switching power supply and battery pack power supply switching.

The city power is AC 220V50HZ AC.

The power management module is also connected to a battery activation terminal, and the battery activation terminal is provided with a battery activation control button.

The power distribution cabinet power system with photovoltaic charging module is applied to the column type distribution cabinet.

Beneficial effects, the utility model adds a photovoltaic charging channel on the basis of the existing power supply. The charging of the battery pack is preferentially taken from the photovoltaic current signal generated by the solar panel; only when the photovoltaic current is absent, it switches to the switching power supply output. The power management module adds the photovoltaic current charging management function, and the corresponding intelligent switching function of the charging channel. The product is especially suitable for the use of the power distribution cabinet on the pole. The power supply supplies power to the intelligent terminal, backup battery, communication equipment, switch control mechanism, etc. in the power distribution cabinet, and achieves the purpose of uninterrupted power supply through the switching management of various power sources.

Description of drawings

The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment;

Fig. 1 is a schematic diagram of the overall circuit of the uninterruptible power supply of the power distribution cabinet utilizing photovoltaic charging described in the present invention.

FIG. 2 is a schematic diagram of the switching circuit for power management and power supply described in the present invention.

Fig. 3 is a schematic diagram of the battery activation circuit described in the present invention.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

Referring to Figure 1, in this embodiment, the input of the power supply includes AC 220V and the photovoltaic current from the solar panel. The power supply provides multiple outputs that can be supplied to smart terminals, control mechanisms and other equipment, and are connected to the corresponding output terminals according to the working power requirements of the equipment. .

AC 220V is taken from the mains or transformed to 220V through a voltage transformer and input to the power management module and switching power supply module; after the switching power supply is input to 220VAC, it is rectified, high-frequency transformer, filtered and rectified to output 24/48VDC DC, and then sent to Power management module; at the same time, the photovoltaic current generated by the solar panel through illumination changes in size and sent to the power management module;

The power management module can monitor the input AC 220VAC, DC 24/48VDC, and photovoltaic current, and obtain the voltage and current by sampling, so as to judge the availability of the input source. At the same time, it can also monitor the current voltage value of the battery and judge the availability of the battery.

For the charging part, when the photovoltaic current reaches the standard value, the power management module switches the charging channel to the photovoltaic channel, and starts the photovoltaic current charging management function to charge the battery or float charge. The management module samples the magnitude of the photovoltaic current and the magnitude of the battery voltage, and controls the charging current through the control circuit according to the charging characteristics of each charging stage of the maintenance-free lead-acid battery. Proper charge current management can greatly improve battery life and battery activity. After the battery is fully charged, the management module controls to enter the floating charge state, and continuously supplements the battery leakage with micro current.

When the photovoltaic current is lower than the standard value and the DC power output by the switching power supply is normal, the management module switches the charging channel to 24/48VDC, and the switching power supply provides the charging current. Similarly, the management module can control the charging current according to the voltage of the battery and the charging characteristics of each voltage section of the battery to achieve the purpose of protecting the battery.

Referring to Figure 2, for the power supply part, generally, the smart terminal and the control mechanism in the station are powered by DC 24/48VDC.

When the AC 220VAC is normal and the switching power supply normally outputs DC 24/48VDC, the power management module closes S1 and connects the output DC terminal to the 24/48VDC of the switching power supply. At this time, the intelligent terminal and the control mechanism are powered by 220VAC through the switching power supply.

When the AC 220VAC power failure is detected, the power management module closes S2 and connects the output DC terminal to the battery. At this time, the intelligent terminal and the control mechanism are powered by the battery.

If the AC 220VAC does not recover for a long time and the battery power is exhausted, the power can be replenished through photovoltaic charging to make the smart terminal and the mechanism work intermittently.

Referring to Figure 3, for the battery activation part, the distribution network dispatching center can send an activation control command to the smart terminal, and the corresponding output contact of the smart terminal is connected to the power management module. When the contact is closed, if the battery power exceeds the working point, the management module will open S1, close S2, switch the power supply channel to the battery, and the smart terminal and control mechanism are powered by the battery until the battery voltage reaches the discharge end position, and then switch back to the switching power supply by S2 and S1.

The battery activation can be started by pressing the button in the station, and the working process of the power management module is the same as that of the remote control activation. There is also a stop activation button in the station, which can stop activation and switch back at any time.

The photovoltaic charging function is added to the power distribution cabinet power supply in this implementation. The power management module has a photovoltaic current charging management function. The power management module has the switching function of the charging channel, which can switch between the output of the switching power supply and the photovoltaic current, and the photovoltaic channel is preferred.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. The utility model does not depart from the spirit and scope of the utility model There will also be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model patent is defined by the appended claims and their equivalents.

Claims (4)

1. An uninterruptible power supply for distribution cabinets utilizing photovoltaic charging, including: a power management module, which is connected to the mains line; its features are: The power management module is also connected to a photovoltaic circuit, and the photovoltaic circuit is connected to the solar panel for charging the rechargeable battery pack; The power management module is respectively connected with the intelligent terminal, the switch control mechanism and the communication module; The power management module is respectively connected with the switching power supply and the rechargeable battery pack; The inside of the power management module is provided with a sampling judgment control module, the sampling judgment control module is connected with the mains circuit; the sampling judgment control module is connected with the switching power supply and the battery pack respectively, and the switching power supply and the battery pack line are arranged on adjustable switches, and the sampling judgment control module is connected with the switching power supply and the battery pack. The judging control module controls switching power supply and battery pack power supply switching. 2. The uninterruptible power supply for distribution cabinets utilizing photovoltaic charging according to claim 1, wherein the mains power is AC 220V50HZ. 3. The uninterruptible power supply for distribution cabinets using photovoltaic charging according to claim 1, wherein the power management module is also connected to a battery activation terminal, and the battery activation terminal is provided with a battery activation control button. 4. The uninterruptible power supply for distribution cabinets using photovoltaic charging according to claim 1, wherein the power supply system for distribution cabinets with photovoltaic charging modules is applied to column-type distribution cabinets.