CN106026382B - A backup emergency power supply - Google Patents

Abstract

The invention provides a standby emergency power supply, which relates to the field of emergency power supplies and comprises a monitoring control unit, a control switch, a diesel engine power generation set, a storage battery, an electric energy quick-release booster circuit, an inversion unit, a charging unit, a switching unit, an alternating current power distribution unit, a first switch and a second switch. The emergency power supply suitable for the market is designed by combining the existing EPS emergency power supply and the diesel engine power generation set according to reasonable arrangement and distribution.

Description

A backup emergency power supply

technical field

The invention relates to the field of power supplies, in particular to a backup emergency power supply.

Background technique

With the improvement of people's living standards, people spend more and more time shopping in shopping malls, which has greatly promoted the development of large shopping malls. Many existing large shopping malls use one building as a unit. When unexpected power failures or power outages occur, accidental stampedes often occur or cause greater economic losses. Therefore, it is necessary to set up an emergency power supply for shopping malls. , to prevent unexpected accidents due to unexpected power outages or power outages.

The existing emergency power supply mainly includes the following types, EPS emergency power supply, UPS uninterruptible power supply, self-provided emergency diesel generator set, special feeder line with automatic input device independent of normal power supply and self-provided emergency gas turbine generator set, etc. . EPS emergency power supply is composed of charger, inverter, battery, isolation transformer, switch and other devices, which is an emergency power supply that converts DC power into AC power. Applicable to loads that are allowed to interrupt power supply for more than 0.25s. UPS uninterruptible power supply is mainly composed of power converter energy storage device and switch, which is a static AC uninterruptible power supply device that ensures the continuity of power supply. It is suitable for loads that allow interruption of power supply for milliseconds. The self-contained emergency diesel generator set is a power generation equipment composed of a diesel engine as the power and driving a power frequency AC synchronous generator. The fast self-starting generator set is suitable for buildings that allow interruption of power supply for more than 15s. The working time of the emergency power supply should be considered according to the power outage time allowed in the production technology. When used in conjunction with an automatically started generator set, it should not be less than 10 minutes. There is a dedicated feeder line independent of the normal power supply with an automatic switch-on device, which is suitable for emergency power supplies whose action time of the automatic switch-on device can meet the allowable power interruption time of 1.5s or more than 0.6s. For particularly important loads that allow a blackout time of milliseconds and have a small capacity, if it is possible to use a DC power supply, a battery pack should be used as an emergency power supply. The self-contained emergency gas turbine generator set is a power generation equipment composed of a gas turbine as the power and driving a power frequency AC synchronous generator.

The above-mentioned various emergency power supplies need a certain reaction time, and because the power supply required by the shopping mall is relatively large, the above-mentioned various independent emergency power supplies cannot meet the needs of the shopping mall. Therefore, it is necessary to design a shopping mall emergency power supply with large power supply and short response time.

Contents of the invention

What the present invention needs to solve is that the existing emergency power supply cannot meet the problems of large power supply and short response time, and provides a backup emergency power supply.

The present invention solves the above problems through the following technical solutions:

A backup emergency power supply, including a monitoring control unit, a control switch, a diesel generator set, a storage battery, an electric energy rapid discharge boost circuit, an inverter unit, a timing discharge circuit, a timing discharge circuit, a charging unit, a switching unit, an AC power distribution unit, a first switch and a second switch;

The monitoring and control unit is used to detect whether there is current passing through the external mains input port and to detect the power of the battery, and also to control the switching unit, the control switch, the charging unit, the first switch and the second switch on and off;

The control switch is a PLC control switch, which is used to control the start of the diesel generator set;

The diesel generator set mainly includes a diesel engine and a generator, and the diesel engine starts to drive the generator to rotate and generate electricity;

Batteries are used to store and release electrical energy;

The electric energy fast release boost circuit is used to connect with the battery, quickly release the electric energy in the battery, and buffer and boost;

The timing discharge circuit is used to regularly discharge and charge the battery;

The inverter unit is used to convert direct current into alternating current, and keep the voltage, frequency, and phase of the output power of the battery consistent with the height of the power grid;

The charging unit is used to invert and decompress the mains power to charge the battery;

The switching unit is used to switch the power supply lines of the mains and the external emergency power supply;

The AC power distribution unit is used to provide stable current to the load;

The first switch controls the utility power to energize the load;

The second switch is used to control whether to charge the storage battery;

The input end of the first switch is connected to the external mains, and the output end of the first switch is respectively connected to the second switch and the switching unit; the output end of the switching unit is connected to the external shopping mall load through the AC power distribution unit; the output end of the second switch The charging unit is connected to the storage battery; the output terminal of the storage battery is connected to the inverter unit through the electric energy rapid discharge boost circuit; the output terminal of the inverter unit is connected to the switching unit; the control terminal of the monitoring control unit is respectively connected to the switching unit, the control switch, the charging The unit, the first switch and the second switch are connected; the output end of the control switch is connected to the inverter unit through the diesel generator set; the detection end of the monitoring control unit is connected to the external mains input port and the storage battery; the input end of the timing discharge circuit is connected to the monitoring The control unit is connected, and the output end of the timing discharge circuit is connected to the storage battery;

The electric energy fast discharge boost circuit includes a battery rapid discharge sub-circuit, an electric energy storage sub-circuit and a boost sub-circuit; the electric energy storage sub-circuit is used for short-term electric energy buffering, and plays the role of inputting a low-power current and outputting a high-power current. Its general buffer time is millisecond level, so it has no effect on the discharge of the emergency power supply, and the boost sub-circuit is used to increase the voltage;

The input end of the battery rapid discharge sub-circuit is connected to the battery; the output end of the battery rapid discharge sub-circuit is connected through the electric energy storage sub-circuit and the boost sub-circuit; the output end of the boost sub-circuit is connected to the inverter unit .

In the above solution, it is preferred that the monitoring control unit includes a controller, a current detection circuit and a power detection circuit, the controller is used to control the switching and starting of each line, the current detection circuit is used to detect whether there is current at the external mains input port, and the power detection circuit The circuit is used to detect the battery power.

In the above solution, preferably, the switching unit mainly includes two relay switches, which are mainly used for switching control lines.

Advantage and effect of the present invention are:

1. The invention has the advantages of intelligent management, long service life, strong overload capacity, perfect protection function, no exhaust, no noise, etc., especially the advantages of convenience, environmental protection, and high efficiency in fire-fighting applications are obvious ;

2. The present invention not only has a fast response time with the EPS emergency power supply, but also can provide a high-power power supply, so it can well meet the needs of shopping malls;

3. The present invention uses electronic detection to control the switches of each channel with signals, so that the control is more accurate and faster.

Description of drawings

Fig. 1 is a schematic block diagram of the present invention.

Detailed ways

The present invention will be further described below in conjunction with embodiment.

A backup emergency power supply, as shown in Figure 1, includes a monitoring control unit, a control switch, a diesel generator set, a storage battery, an electric energy rapid release boost circuit, an inverter unit, a timed discharge circuit, a charging unit, a switching unit, and an AC power distribution unit, a first switch and a second switch.

The input terminal of the first switch is connected with the external commercial power. The output end of the first switch is respectively connected with the second switch and the switching unit. The output end of the switching unit is connected to the external shopping mall load through the AC power distribution unit. The output terminal of the second switch is connected with the battery through the charging unit. The output terminal of the storage battery is connected with the inverter unit through the electric energy rapid discharge boost circuit. The output terminal of the inverter unit is connected with the switching unit. The control terminal of the monitoring control unit is respectively connected with the switching unit, the control switch, the charging unit, the first switch and the second switch. The output end of the control switch is connected with the inverter unit through the diesel generator set. The detection terminal of the monitoring control unit is connected to the external mains input port and the storage battery; the input terminal of the timing discharge circuit is connected to the monitoring control unit, and the output terminal of the timing discharge circuit is connected to the storage battery, as shown in Figure 1.

The monitoring and control unit is used to detect whether there is current flowing through the external mains input port and to detect the power of the storage battery, and also controls the switching unit, the control switch, the charging unit, the first switch and the second switch to be turned on and off. The monitoring and control unit mainly includes a controller, a current detection circuit and a power detection circuit. The controller is used to control the switching and starting of each line. The current detection circuit is used to detect whether there is current at the external mains input port. The power detection circuit is used to detect the battery power. .

The control switch is a PLC control switch, which is used to control the start of the diesel generator set. It is used to receive the control signal from the monitoring control unit, and control the start or stop of the diesel generator set according to the control signal.

The diesel generator set mainly includes a diesel engine and a generator. The diesel engine starts to drive the generator to rotate and generate electricity. The diesel engine is used to burn diesel to convert heat energy into kinetic energy to rotate and drive the generator to rotate. The generator is used to convert kinetic energy into electrical energy and output electrical energy.

Batteries are used to store and release electrical energy. The storage battery is used as the energy storage medium of the emergency power supply. Since the present invention is used in large shopping malls, the storage battery is a large energy storage battery, which has the advantages of large storage power and fast release of power.

The electric energy rapid discharge boost circuit includes a battery rapid discharge sub-circuit, an electric energy storage sub-circuit and a boost sub-circuit; the input terminal of the battery rapid discharge sub-circuit is connected to the battery; The sub-circuit is connected with the boost sub-circuit; the output terminal of the boost sub-circuit is connected with the inverter unit. The battery rapid discharge sub-circuit is used to connect with the battery and quickly release the electric energy in the battery. The electric energy storage sub-circuit is used for short-term electric energy buffering, which plays the role of inputting low-power current and outputting high-power current. The buffer time is millisecond level, so it has no effect on the discharge of the emergency power supply, and the boost sub-circuit is used to increase the voltage.

The inverter unit is used to convert DC power into AC power, and keep the voltage, frequency, and phase of the output power of the battery consistent with the height of the power grid, so as to better provide power for the shopping mall.

The timing discharge circuit is used to discharge and charge the storage battery at regular intervals, which has the function of timing protection for the storage battery and prolongs the service life of the storage battery.

The charging unit is used to invert and decompress the commercial power to charge the storage battery, and the charging switch is controlled by the control terminal of the monitoring control unit.

The switching unit is used to switch the power supply lines of the mains power supply and the external emergency power supply, and its switching action is controlled by the monitoring control unit, mainly including two-way relay switches, which are mainly used for switching control lines.

The AC power distribution unit is used to provide stable current to the load, and has the characteristics of stable output. The AC power distribution unit can directly provide 220V AC power to the load, or raise the voltage to 360V, etc., and provide current according to the needs of the load.

The first switch controls the utility power to energize the load, and its switching action is controlled by the monitoring control unit. The first switch is mainly a relay switch, which is controlled by the monitoring and control unit to input pulse signals to turn on or off the large current.

The second switch is used to control whether to charge the storage battery, and the air charging in Australia plays a controlling role, and its switch action is also controlled by the monitoring control unit.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can also make various equivalent modifications or replacements without violating the spirit of the present invention. , these equivalent modifications or replacements are included within the scope of the present application.

Claims (3)

1. a kind of spare emergent power source, it is characterised in that：Including monitoring and controlling unit, control switch, diesel power generation group, electric power storage Pond, electric energy speed put booster circuit, inversion unit, timed discharging circuit, charhing unit, switch unit, Alternating Current Unit, first Switch and second switch；

Monitoring and controlling unit is used to detect whether external alternating current input port to have electric current by the electricity with detection accumulator, simultaneously also Control the Push And Release of switch unit, control switch, charhing unit, first switch and the second switch；

Control switch is PLC control switches, the startup for controlling diesel power generation group；

Diesel power generation group includes mainly diesel engine and generator, and diesel engine starting drives generator to carry out rotation power generation；

Accumulator is for storing electric energy and release electric energy；

Electric energy speed puts booster circuit for quickly the electric energy in accumulator to be released with accumulator connection, and buffers and rise Pressure；

Timed discharging circuit is for periodically giving battery discharging and charging；

Inversion unit is used to direct current be transformed into alternating current, and voltage, frequency, phase and the power grid that accumulator is exported to electric energy are high Degree is consistent；

Charhing unit is used to alternating current carry out inversion decompression to charge a battery；

Switch unit is used to switch the supply line of alternating current and external emergency power supply；

Alternating Current Unit is used to provide stable electric current to load；

First switch control city supplies electricity to load and is powered；

Second switch is for controlling whether to charge to accumulator；

The input terminal of first switch is electrically connected with external city, and the output end of first switch connects with second switch and switch unit respectively It connects；The output end of switch unit is connected through Alternating Current Unit and external market load；The charged list of output end of second switch Member is connect with accumulator；The output end of accumulator is put booster circuit through electric energy speed and is connect with inversion unit；The output of inversion unit End is connect with switch unit；The control terminal of monitoring and controlling unit is opened with switch unit, control switch, charhing unit, first respectively Pass is connected with second switch；The output end of control switch is connect through diesel power generation group with inversion unit；Monitoring and controlling unit Test side is connect with external alternating current input port and accumulator；The input terminal of timed discharging circuit is connect with monitoring and controlling unit, fixed When discharge circuit output end connect with accumulator；

It includes accumulator repid discharge sub-circuit, electric energy savings sub-circuit and boosting sub-circuit that the electric energy speed, which puts booster circuit,； Accumulator repid discharge sub-circuit is used to connect with accumulator and quickly release the electric energy in accumulator；Electric energy savings Circuit plays the role of inputting small-power electric current for the electric energy buffering in the short time, exports high-power electric current, general slow It is Millisecond to rush the time, therefore is not have influential on the electric discharge of emergency power supply, and boosting sub-circuit is for increasing voltage；

The input terminal of the accumulator repid discharge sub-circuit is connect with accumulator；The accumulator repid discharge sub-circuit it is defeated Outlet is connected through electric energy savings sub-circuit with boosting sub-circuit；The output end of the boosting sub-circuit is connect with inversion unit.

2. a kind of spare emergent power source according to claim 1, it is characterised in that：The monitoring and controlling unit includes control Device, current detection circuit and electric quantity detecting circuit, controller are used to control switch and the startup of each circuit, current detection circuit For detecting whether external alternating current input port has electric current, electric quantity detecting circuit is for detecting accumulator electric-quantity.

3. a kind of spare emergent power source according to claim 1, it is characterised in that：The switch unit includes mainly two-way Relay switch, be mainly used for the switching of control circuit.