RU225598U1 - Modular uninterruptible power supply - Google Patents

Abstract

The utility model relates to electrical engineering. The technical result consists in increasing the reliability of power supply and the stability of the modular uninterruptible power supply device. The modular uninterruptible power supply device contains a housing in which the monitoring and control panel is located, a bypass module having an emergency shutdown input, an AC input from the network connected through an input circuit breaker, an input for connecting the monitoring and control panel, a synchronization input connected to at least , to one rectifier-inverter module, an information output, a relay interface output, the AC output of the bypass module is connected to the AC output of the load through an output machine and a bypass circuit connection key located in the bypass module, in addition, at least one rectifier - the inverter module contains an AC input from the network through an input circuit breaker, the AC output of the rectifier-inverter module is connected through a switch for connecting the output of the rectifier-inverter module located in the bypass module, and the output circuit breaker is connected to the AC output of the load, while between the series-connected the key for connecting the bypass circuit and the key for connecting the output of the rectifier-inverter module, the AC output is connected to the load, the DC output of the rectifier-inverter module is connected to the battery cabinet, while the manual bypass machine is connected between the AC input from the network and the AC output to load, bypassing the bypass module and the rectifier-inverter module. 1 ill.

Description

The utility model relates to electrical engineering and is intended to provide uninterrupted power supply, in particular to railway automation and telemechanics devices on the railway network.

A device for uninterruptible power supply is known (RF Patent for invention No. 2576664, IPC H02J 9/00, published 03/10/2016, Bulletin No. 7), including connected to an autonomous power plant, containing a backup generator, an isolation unit from the power system, a switch connecting the specified unit to the main AC bus, a switch for connecting an autonomous power plant to the main AC bus, a switch for connecting a backup generator to the main AC bus, means of automatic shutdown of fully and partially disconnected, as well as non-disconnectable consumers, a control system connected to an autonomous power plant, a backup generator, the main alternating current bus, from which completely and partially disconnected and non-disconnectable consumers are powered through means of automatic power supply shutdown, and the autonomous power plant is connected to the alternating current bus both through a switch and through an isolation unit from the power system, thyristor automatic transfer switch devices , one of which is connected in parallel with the switch for connecting the autonomous power plant to the main AC bus, and the other is connected in parallel with the switch for connecting the backup generator to the main AC bus, and a thyristor switch connected in parallel with the switch for connecting the inverter to the main AC bus, and the outputs control systems are connected to the inputs of thyristor devices for automatic transfer of reserve and thyristor switch, and the isolation unit from the power system is additionally

equipped with a charger connected in series through a rectifier with a switch, which is connected in series with the AC buses of the backup generator, as well as a switch for connecting the battery to the inverter and DC buses connecting the rectifier and the switch for connecting the batteries.

The disadvantage of this invention is the complexity of the technological process and limited use.

An uninterruptible power supply device is known (RF Patent for invention No. 2457598, IPC H02J 9/06, published July 27, 2012, Bulletin No. 21), which contains a backup power supply, a rectifier connected to a three-phase network, an inverter, DC and AC buses , and contains inverter blocks with inverters in each, power switches, input filters and a control system, and a battery block is used as a backup power source, and the positive output of the rectifier, the first terminals of the battery block, the first power switch are connected to the first DC bus, the first input filter, through the fourth and fifth power switches, the positive inputs of the first and second inverters of the first inverter block and the first input of the control system, the negative output of the rectifier, the second terminal of the battery unit, the first terminals of the third power switch, the second input filter are connected to the second DC bus, negative inputs of the first and second inverters of the second inverter block and the second input of the control system, the first output of the power switch is connected to the second output of the first power switch, the second output of the second input filter and through the sixth and seventh power switches the positive inputs of the first and second inverters of the second inverter block, to the second output of the third power switch is connected to the second output of the second power switch, the second output of the first input filter, the negative inputs of the first and second inverters of the first inverter block, the first outputs

inverters of the inverter blocks are combined and connected to the second AC bus, to which the second output of the uninterruptible power supply device and the fourth input of the control system are also connected, the second inputs of the inverters of the inverter blocks are combined and connected to the first AC bus, to which the first output of the device is also connected uninterruptible power supply and the third input of the control system, the first, second, third and fourth outputs of the control system are connected to the third control inputs of the inverters of the inverter blocks, respectively.

The disadvantage of this invention is the limited scope and low reliability of operation.

The closest in technical essence is an uninterruptible power supply device (RF Patent for utility model No. 79218, IPC H02J 9/00, published December 20, 2008, Bulletin No. 35), containing at least two inputs for connecting single-phase or three-phase lines alternating current, each of which is connected to its own rectifier module containing at least two rectifiers when connected to a single-phase line or at least three rectifiers when connected to a three-phase line, and the outputs of the rectifier modules are connected in parallel and through a DC power supply with at least one battery battery, connected to an inverter system containing at least two inverter modules connected in parallel, each of which consists of at least two inverters for powering a single-phase load or at least three inverters for powering a three-phase load, alternating voltage from each of which is supplied to alternating current consumers at the outputs of the device, galvanically isolated from the input lines.

The disadvantage of this technical solution is the inability to carry out preventive or repair work on rectifiers and/or inverters.

The technical result of the claimed utility model is to increase the reliability of power supply and stability of operation of a modular uninterruptible power supply device and expand the functionality of the device when carrying out preventive and/or repair work on the component parts of the device.

The technical result is achieved due to the fact that the modular uninterruptible power supply device contains a housing in which are located: a monitoring and control panel, a bypass module having an emergency shutdown input, an AC input from the network connected through an input circuit breaker, an input for connecting the monitoring and control panel , a synchronization input connected to at least one rectifier-inverter module, an information output, a relay interface output, the AC output of the bypass module is connected to the AC output of the load through an output machine and a bypass circuit connection key located in the bypass module, in addition, at least one rectifier-inverter module contains an alternating current input from the network through an input circuit breaker, an alternating current output of the rectifier-inverter module is connected through a switch for connecting the output of the rectifier-inverter module located in the bypass module, and an output circuit breaker to the AC output current to the load, while between the serially connected key for connecting the bypass circuit and the key for connecting the output of the rectifier-inverter module, the AC output is connected to the load, the DC output of the rectifier-inverter module is connected to the battery cabinet, while the manual bypass machine is connected between the AC input current from the mains and the AC output to the load, bypassing the bypass module and the rectifier-inverter module.

The presence of new distinctive essential features indicates compliance of the claimed utility model with the patentability criterion of “novelty”.

The claimed technical solution can be made from known materials using known means, which indicates that the claimed utility model meets the patentability criterion of “industrial applicability”.

A prototype of the device called “UBP-AT” (decimal number - TLSV.665211.001) was manufactured and tested at JSC “Atis”, St. Petersburg, and with a positive result it underwent trial operation at the Monino station of the Moscow railway.

The claimed technical solution is illustrated by the drawing:

fig. 1 - block diagram of a modular uninterruptible power supply device.

Symbols used in Fig. 1:

1 - body;

2 - bypass module;

3 - monitoring and control panel;

4 - input machine;

5 - rectifier-inverter module;

6 - key for connecting the bypass circuit;

7 - output machine;

8 - key for connecting the outputs of the rectifier-inverter module;

9 - battery cabinet;

10 - automatic manual bypass.

The claimed technical solution is described as follows.

The modular uninterruptible power supply device structurally consists of a housing (1), which houses a control and monitoring panel (3), a bypass module (2) and at least one rectifier-inverter module (5). The control panel is the user interface and includes

the following elements: LCD screen with a mimic diagram, LED status indicators of the modular uninterruptible power supply device, control buttons and parameter settings. The control and monitoring panel receives the following information from the bypass module (2):

device operating mode;

monitoring the state of the rectifier-inverter module;

monitoring the status of the manual bypass (10);

temperature control in the battery cabinet (9);

warning about turning off the device when operating on batteries in case of deep discharge;

low battery voltage warning, device malfunction warning;

warning about the operation of the manual bypass (10) and circuit breakers (6,8);

warning about mains power failure;

values of electrical parameters (current, voltage, power).

Each rectifier-inverter module (5) contains the power part of the claimed technical solution and consists of two rectifiers and an inverter.

The operating principle of the presented components of the device is described in [Zhavoronkov M.A. Electrical engineering and electronics: Textbook. aid for students institutions of higher education prof. education / M.A. Zhavoronkov, A.V. Kuzin. - 4th ed., rev. - M.: Publishing center "Academy", 2011. - 400 p.].

To ensure normal and accelerated charging of the batteries, the rectifier-inverter module (5) is connected to the battery cabinet (9) through the terminal connectors for the input, output and connection of the batteries. The battery cabinet is a free-standing housing that houses at least 40 batteries and contains sensors for monitoring the temperature of the batteries and the environment.

The bypass module (2) contains:

a static bypass circuit that supplies voltage when the rectifier-inverter module is inoperative (5);

electronically controlled switching circuits;

electrical inverter control circuits to ensure load switching from the inverter output to a static bypass circuit in compliance with synchronization conditions.

The bypass module (2) is equipped with an emergency shutdown input and two outputs: information and relay interface.

The claimed technical device operates in the following modes.

1. Normal mode.

In normal mode, the rectifier-inverter module (5) receives power from an external source (Fig. 1, AC input from the network). At the top and bottom of the housing there are panel inputs for connecting power and information cables. Through the input circuit breaker (4), the position of which is “closed”, electrical energy enters the rectifier-inverter module (5). Rectifiers (module 5) convert the input three-phase AC voltage into direct voltage, and supply it to the inverter, while simultaneously constantly normal or accelerated charging the batteries of the battery cabinet (9). The inverter (module 5) converts DC voltage into alternating current, which is supplied through the switch for connecting the outputs of the rectifier-inverter module (8) of the bypass module (2), the position of which is “closed”, and the output circuit breaker (7), the position of which is “closed”, to the AC output to the load.

2. Battery operation mode.

In the absence of power supply from external sources (Fig. 1, AC input from the network), the inverter (module 5) receives electrical energy from the batteries of the battery cabinet (9) through the terminal connectors of the input, output and connection of the batteries.

Then, through the switch for connecting the outputs of the rectifier-inverter module (8), the bypass module (2), the position of which is “closed”, and the output circuit breaker (7), the position of which is “closed”, to the AC output to the load.

Once the input voltage from external power supplies is restored, normal operation resumes automatically.

3. Automatic bypass operating mode.

The automatic bypass mode ensures that the load (Fig. 1, AC output to the load) connected to the device output is connected to an external power source (Fig. 1, AC input from the network) in automatic mode through the bypass module (2).

If the overload capacity of the inverter is exceeded and/or the inverter trips, the bypass module interface module (2) will command the bypass module static bypass circuit (5) to transfer the load from the inverter to an external source of electrical energy, bypassing the inverter rectifier module (5). In this case, the input circuit breaker (4) and the bypass circuit connection switch (6) are closed.

4. Manual bypass.

Switching to manual bypass mode is provided to ensure continuity of power supply to the load in the event of a failure of the modular uninterruptible power supply device or its maintenance. In this case, power from the external network (Fig. 1, AC input from the network) is supplied to the load through the terminal connectors, bypassing the rectifier-inverter module (5) and the bypass module (2), through the manual bypass (10), the position of which is “ closed."

Thus, in the event of a loss of electricity at the input or for the purpose of carrying out preventive and repair work, due to the double circuit bypass of the modules, the modular uninterruptible power supply device will continue to provide the load for railway automation and telemechanics devices

reliable and uninterrupted three-phase AC voltage, thereby ensuring the achievement of a technical result.

Claims (1)

A modular uninterruptible power supply device containing a housing containing: a monitoring and control panel, a bypass module having an emergency shutdown input, an AC input from the mains connected through an input circuit breaker, an input for connecting a monitoring and control panel, a synchronization input connected via to at least one rectifier-inverter module, an information output, a relay interface output, an AC output of the bypass module is connected to the AC output of the load through an output circuit breaker and a bypass circuit connection key located in the bypass module, in addition, at least one rectifier-inverter module contains an AC input from the network through an input circuit breaker, the AC output of the rectifier-inverter module is connected through a key for connecting the output of the rectifier-inverter module located in the bypass module, and the output circuit breaker is connected to the AC output of the load, while between the serially connected key for connecting the bypass circuit and the key for connecting the output of the rectifier-inverter module, an AC output is connected to the load, a DC output of the rectifier-inverter module is connected to the battery cabinet, while a manual bypass machine is connected between the AC input from the network and the AC output current to the load, bypassing the bypass module and the rectifier-inverter module.

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