CN211579692U

CN211579692U - UPS power supply of power frequency framework

Info

Publication number: CN211579692U
Application number: CN202020629918.3U
Authority: CN
Inventors: 吴艳生; 王江涛; 王书林
Original assignee: Zhengzhou Agus Electronic Technology Co ltd
Current assignee: Zhengzhou Agus Electronic Technology Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2020-09-25
Anticipated expiration: 2030-04-24

Abstract

The utility model discloses a UPS power of power frequency framework, including the power mainframe box, the group battery, PWM inverter, the commercial power input that the power mainframe box set up is used for putting through the commercial power, commercial power is once through the frequency rectifier rectification behind the wave filter again and is the power frequency direct current, charge for the group battery through the charger, the power end of group battery is connected PNM inverter input, PNM inverter output forms power frequency alternating current power supply after connecting the power frequency transformer and is connected to static switch's input, static switch's output connects the UPS power output that corresponds on the power mainframe box, the commercial power another reconnection power module after crossing the wave filter, then connect static switch's input; the utility model discloses detect respectively to each monolithic battery among the UPS electrical equipment of unit operation to be convenient for the inspection and change the processing.

Description

UPS power supply of power frequency framework

Technical Field

The utility model belongs to the technical field of industry UPS power supply unit, concretely relates to UPS power of power frequency framework.

Background

In the development of automation technology, each production enterprise workshop control equipment management system has higher and higher requirements on the reliability of a power supply system, and in order to ensure that the control system normally and continuously maintains the management function, a storage battery pack is used as a standby UPS (uninterrupted power supply) device to provide power for various automation equipment, and particularly, when a power system fails, reliable power guarantee can be provided for safe operation. The battery of the conventional UPS equipment adopts a lithium iron phosphate battery, and the battery provides a new choice for the UPS equipment due to the advantages of environmental protection, long cycle life and large energy ratio and the rapid development of the lithium battery technology. However, the fault short-circuit current is greatly improved due to the fact that the novel floating-charging type lithium iron phosphate battery also brings about the fault short-circuit current, and UPS power equipment using the battery is likely to be shut down due to sudden power failure of the UPS power equipment and shutdown of a control system caused by power failure after long-term operation due to the fact that the battery fails or the internal reason of the battery is not timely perceived and replaced, so that the equipment in operation stops working, production is seriously influenced, and even explosion occurs, and serious accidents of equipment damage or casualties are caused. Therefore, whether the real-time and on-line diagnosis of the health condition of the storage battery can be realized for timely treatment is a necessary premise for avoiding the faults and accidents.

In addition, the UPS power equipment operated by a single machine is usually formed by connecting a plurality of storage batteries in series, when the UPS power equipment operated by the single machine cannot meet the requirements of users, the UPS power equipment connected in parallel can be added to improve the operation reliability, and a direct parallel-operation type redundant power supply system is formed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a defect and problem to current UPS power supply unit existence in the aspect of detecting, the utility model provides a UPS power of power frequency framework to each monolithic battery detects respectively in the UPS power supply unit to the unit operation, and is convenient for the inspection and change the processing.

The utility model provides a scheme that its technical problem adopted is: a UPS power supply of power frequency framework comprises a power supply mainframe box, a battery pack and a PWM inverter, wherein a mains supply input end arranged on the power supply mainframe box is used for connecting with mains supply, one mains supply is rectified into power frequency direct current through a power frequency rectifier after passing through a filter, the battery pack is charged through a charger, a power supply end of the battery pack is connected with an input end of the PNM inverter, an output end of the PNM inverter is connected with a power frequency transformer to form a power frequency alternating current power supply which is connected to an input end of a static switch, an output end of the static switch is connected with a corresponding UPS power output end on the power supply mainframe box, and the other mains supply is connected; the output end of the controller is respectively connected with the control end of the PWM inverter, the control end of the power module and the control end of the charger, the keys positioned on the power main case are respectively connected with the input end of the controller and used for mode switching, and the display and the corresponding indicator lamp positioned on the power main case are used for displaying the mode, outputting the power information and the fault information.

The power supply end of the battery pack is connected with the battery performance detection module, and the signal output end of the battery performance detection module is connected with the signal input end of the controller.

And the signal output end of the controller is connected with the memory for information storage, and the signal output end is connected with the data output end of the power supply main case and used for transmitting power supply change information and switching information outwards.

The power supply main case comprises an inner support, the inner support is provided with a platform for placing or fixedly mounting a storage battery, a track structure is arranged between the bottom of the inner support and a bottom plate of the power supply main case, a rear wall plate is fixed at the outer end of the inner support, an outer roller is mounted below the outer end of the inner support, and the outer roller is in contact with the ground.

The power supply end of each battery in the battery pack is respectively connected with each terminal corresponding to the single battery detection circuit, and each corresponding output end of the single battery detection circuit is connected with the signal input end of the controller.

The single battery detection circuit comprises a plurality of comparators with the same number as the single batteries, high-resistance resistors are respectively connected in series with connecting terminals of the single batteries which are connected in series in the same battery pack, a signal wire is led OUT from the anode of each single battery and is connected with the positive input end of the corresponding comparator, the reverse input end of each comparator is sequentially connected in series with a divider resistor and then is grounded, the OUT end of each comparator is respectively connected with the grid electrode of an N-channel MOS tube, the source electrode of each MOS tube is grounded, and the drain electrode of each comparator is connected with the input end of the battery performance detection module.

The utility model has the advantages that: the utility model discloses detect respectively to each monolithic battery among the UPS electrical equipment of unit operation to be convenient for the inspection and change the processing. The controller monitors the corresponding monoblock according to the monoblock battery detection circuit, and sets a data monitoring time window parameter, a voltage protection out-of-limit value parameter and a current out-of-limit threshold value parameter so as to achieve the charging management function of battery charging regulation control and discharging control and adapt to the battery management requirements under different battery numbers or different operating states.

Drawings

Fig. 1 is a diagram of the utility model of a power frequency conversion UPS power output system.

Fig. 2 is a connection circuit diagram of the battery and the battery performance detection module.

Fig. 3 is a circuit diagram of a monoblock battery detection circuit.

Detailed Description

The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

Fig. 1 is a system block diagram of a UPS power supply of a line-frequency architecture, in which a main power supply cabinet is provided with a mains input for connecting to mains. One of the commercial power is used for standby after electric energy conversion and storage through the storage battery module, and the other commercial power is used for external power supply through filtering processing.

And one of the commercial power branches passes through the filter and then is rectified into power frequency direct current by the power frequency rectifier, and the battery pack is charged by the charger. The battery pack comprises a plurality of single storage batteries which are connected in series, and a plurality of storage batteries can be connected in parallel to form a redundant power supply mode. The power supply end of the storage battery pack is connected with the input end of the PNM inverter, the output end of the PNM inverter is connected with the power frequency transformer to form a power frequency alternating current power supply after direct current is converted into alternating current by the PNM inverter, and then the power frequency alternating current power supply is connected to the input end of the first static switch. The output end of the static switch is connected with the corresponding UPS output end on the power supply main case, and the controller is used for controlling the static switch to realize access control.

The power supply end of the battery pack is connected with the battery performance detection module, and the signal output end of the battery performance detection module is connected with the signal input end of the controller. The battery performance detection module comprises a voltage detection chip MIC833 and a peripheral circuit. The battery performance detection module also comprises a voltage balance protection module, when the battery is in a floating charge state, the maximum voltage value of each single battery in the battery module is judged, if the maximum voltage value of each single battery exceeds the storage battery or exceeds a set rated threshold value, the controller automatically starts the voltage balance protection module to implement protection measures, and the current equalizing circuit resistor discharges. Each loop in the voltage balance protection module is respectively connected with an electronic switch and controlled by a controller, and the redundant energy of the fully charged single battery is transferred to the whole battery pack through control. When the battery is in an accident or test discharge state, the controller controls to close the voltage balance protection function.

The power supply end of each battery in the battery pack is respectively connected with each terminal corresponding to the single battery detection circuit, and each corresponding output end of the single battery detection circuit is connected with the signal input end of the controller. The single battery detection circuit comprises a plurality of comparators LM385 with the same number as the single batteries, wherein high-resistance chip resistors 8R20 are respectively connected in series on connecting terminals of the single batteries which are connected in series in the same battery pack, a signal wire is led OUT from the positive electrode of each single battery and is connected with the positive input end of the corresponding comparator, the reverse input end of each comparator is sequentially connected with a divider resistor in series and then is grounded, the OUT end of each comparator is respectively connected with the grid electrode of an N-channel MOS tube, the source electrode of each MOS tube is grounded, and the drain electrode of each MOS tube is connected with the input end of the battery performance detection module.

And the other branch of the commercial power is connected with the power module after passing through the filter and then is connected with the input end of the second static switch.

The output end of the controller is respectively connected with the control end of the PWM inverter, the control end of the power module and the control end of the charger. The keys positioned in the power supply main case are respectively connected with the input end of the controller and used for mode switching, and the display positioned in the power supply main case and the corresponding indicator lamps are used for displaying the mode, the output power information and the fault information. The signal output end of the controller is connected with the memory for information storage, and the signal output end is connected with the data output end of the power supply main case and used for transmitting power supply change information and switching information outwards.

The processor carries out classification processing and data analysis on the alarm information by periodically inquiring the characteristic data and the alarm information of time windows before and after the occurrence of the battery fault, diagnoses and identifies the fault characteristics of the battery system, such as fault position, fault reason and the like, realizes real-time fault diagnosis and prediction of each single storage battery in the UPS equipment and prompts of a fault removing method, thereby achieving the fault diagnosis function.

Claims

1. A UPS power supply of power frequency framework, including power host box, assembled battery, PWM inverter, characterized by that, the mains supply input end that the power host box sets up is used for putting through the commercial power, the commercial power is rectified into the direct current of power frequency through the power frequency rectifier after passing the filter, charge the assembled battery through the charger, the power end of the assembled battery connects the input end of PNM inverter, the output end of PNM inverter forms the alternating current power supply of power frequency to connect to the input end of the static switch after connecting the power frequency transformer, the output end of the static switch connects the correspondent UPS power output end on the power host box, the commercial power connects the power module after another filter, then connect the input end of the static switch; the output end of the controller is respectively connected with the control end of the PWM inverter, the control end of the power module and the control end of the charger, the keys positioned on the power main case are respectively connected with the input end of the controller and used for mode switching, and the display and the corresponding indicator lamp positioned on the power main case are used for displaying the mode, outputting the power information and the fault information.

2. The industrial frequency architecture UPS of claim 1, wherein the power supply terminal of the battery pack is connected to the battery performance detection module, and the signal output terminal of the battery performance detection module is connected to the signal input terminal of the controller.

3. The industrial frequency architecture UPS power supply of claim 1, wherein the signal output of the controller is coupled to the memory for information storage, and the signal output is coupled to the data output of the power main chassis for communicating power supply variation information and switching information externally.

4. The industrial frequency architecture UPS of claim 1, wherein the power supply terminal of the battery pack is connected to the battery performance detection module, and the signal output terminal of the battery performance detection module is connected to the signal input terminal of the controller.

5. The industrial frequency architecture UPS of claim 4, wherein each battery in the battery pack has a power terminal connected to a corresponding terminal of the battery cell detection circuit, and each corresponding output terminal of the battery cell detection circuit is connected to a signal input terminal of the controller.

6. The industrial frequency architecture UPS according to claim 5, wherein the monoblock battery detection circuit comprises a plurality of comparators in accordance with the number of monoblock batteries, high-resistance resistors are respectively connected in series with the connection terminals of the monoblock batteries connected in series in the same battery pack, a signal line is led OUT from the positive electrode of each monoblock battery and is connected with the positive input end of the corresponding comparator, the negative input end of each comparator is sequentially connected with a divider resistor in series and then is grounded, the OUT end of each comparator is respectively connected with the grid electrode of an N-channel MOS tube, the source electrode of each MOS tube is grounded, and the drain electrode of each comparator is connected with the input end of the battery performance detection module.