RU170864U1 - Block-complete automated power plant - Google Patents

Abstract

The utility model relates to the electric power industry, namely to electrical devices of complete prefabricated block-container execution (container block-box). A useful model of a block-complete automated power plant (BKAE) is intended for backup or emergency power supply of consumers with three-phase alternating current with a voltage of 400 V and frequency of 50 Hz, for backup power supply of operational circuits of transformer substations (complete transformer substations) in the event of their de-energization or the output of the mains voltage for additional if necessary, a block-complete automated power plant (BKAE) provides for a mode of short-term parallel operation with an external network during the recovery of the external network voltage and a mode of long-term parallel operation of several BKAEs as emergency sources of electricity. The technical result is uninterrupted power supply to electricity consumers that do not allow interruption in power supply (consumers). The technical result is achieved by the fact that block-complete automation The power plant contains a block box with hermetic inputs in the end walls for docking with other block boxes, consisting of one compartment equipped with an entrance, in which a backup power source of the external network is located and fixed in the form of a low-power diesel generator, uninterruptible power supply, shield auxiliary needs associated with the generator board, automatic power plant control system; automatic start-up control systems, while the power input busbars from the diesel generator are connected through the generator circuit breaker to the output buses through the generator board to the complete transformer substation, which is connected to the main external power supply to provide voltage supply and shutdown.

Description

The utility model relates to the electric power industry, and in particular to electrical devices of block-container execution of full factory readiness (container block box).

The inventive utility model block-complete automated power plant (BKAE) is intended for backup or emergency power supply to consumers with three-phase alternating current with a voltage of 400 V and a frequency of 50 Hz, for backup power supply of operational circuits of transformer substations (complete transformer substations) if they are de-energized or the mains voltage goes beyond permissible limits.

If necessary, the BCAE provides a mode of short-term parallel operation with an external network during the recovery period of the external network voltage and a mode of long-term parallel operation of several BCAAs as emergency power sources.

A device is known "Energy block module" (RF patent for utility model No. 95189 from 01/27/2010, publ. 06/10/2010).

The energy block module includes a diesel generator located in the container, a control panel, a heater, a ventilation device with a drive, a first power supply switching unit, a power supply bus, an additional power supply bus, an air temperature sensor unit and an air conditioner, additionally includes a solar battery, maximum power take-off device and charge-discharge regulator.

A device for backup power supply of a power plant is known, containing a main source of electricity connected to a backup power bus, to which consumers of auxiliary needs of the power plant are connected, and an auxiliary power source, characterized in that it is equipped with a fast power bus connected through emergency input of the reserve to the main and auxiliary sources of electricity, while some consumers of their own needs of the power plant are connected simultaneously to the fast-food bus and to the backup bus Foot Power (utility model number 70730).

A device for power supply to consumers is known, which is an energy block module that includes a diesel generator, a control panel, a heater, a ventilation device with a drive, a power supply switching unit, an uninterruptible power supply unit (UBP), an air temperature sensor block, and power bus consumers and an additional power supply bus for consumers, the air conditioner and a second additional power supply bus can also be included in the block module I consumers.

In this block module, uninterrupted power supply for especially critical consumers of electricity is guaranteed, a break in the power supply of responsible consumers occurs only during the start of the diesel generator (utility model patent No. 69340, 03. 08. 2007).

This technical solution was made as a prototype of this utility model.

The objective of the utility model is to create a block-complete automated power plant (BKAE) for backup or emergency power supply to consumers with three-phase alternating current.

EFFECT: uninterrupted power supply of electric power consumers, not allowing interruption in power supply to consumers.

The technical result is achieved by the fact that the block-complete automated power plant contains a block box with hermetic inputs in the end walls for docking with other block boxes, consisting of one compartment equipped with an input in which a backup power source of an external network is located and fixed in the form of a low-power diesel generator, uninterruptible power supply, auxiliary needs shield connected with the generator’s shield, automatic power plant control system; automatic start-up control systems, while the power input busbars from the diesel generator are connected through the generator circuit breaker to the output buses through the generator board to the complete transformer substation, which is connected to the main external power supply to provide voltage supply and shutdown.

The utility model contains a block box in which a backup power source - a diesel generator (DG) and all the systems necessary to ensure operation - uninterrupted power supply to electricity consumers that prevent interruptions in power supply to consumers are located and fixed.

Structurally, the BKAE is an insulated block box (container) with all BKAE systems located in it. The design of the block container is an all-welded metal frame consisting of a base, wall frames and a roof. The base is insulated with mineral wool, the floor is made of smooth steel sheet metal and coated with aluminum corrugated sheet. Outside, the walls are sheathed with sandwich panels to increase fire resistance. The frame of the walls is covered with a flame retardant. The roof is made in two versions: trapezoidal and gable.

The essence of the utility model is illustrated by an example of a specific implementation.

The block box is single-section with a low-power diesel engine (diesel generator) with a capacity of 16, 30, 60 kW.

The construction of the block box is shown in FIG. 1 (front view), where

1 - supporting frame,

2 - wall (enclosing) structures,

3 - roof

4 - external entrance door,

10 - exhaust system

13 - drain leaks from DG.

The roof is made with a removable hatch for mounting (dismantling) DG.

The box contains technological and mounting openings for installing equipment, as well as mounting a gas exhaust system and ventilation system, connectors for connecting external cables, bolt clamps for grounding the BCAE, supporting structures for attaching the diesel engine and auxiliary equipment; and also made openings for installing air valves, openings for laying control cables and the passage of the exhaust tract; passages of pipes of the fuel system.

The internal cavities, the external and internal surfaces of the block box are protected by anti-corrosion coatings.

The BKAE block box is manufactured using structural materials that provide the III or IV degree of fire resistance of the product as a whole (according to SNiP 21-01-97).

The arrangement of the BCAE operation support systems fixed inside the block box is shown in FIG. 2 (section AA).

Inside the compartment are placed and fixed

 on the frame - diesel generator 5 (DG),

 shield of own needs (ЩСН) 6,

 Generator board (ЩГ) 7, under which branching boxes 8 are located,

 uninterruptible power supply (UPS) - 9,

 fuel tank 11,

 two fire alarm cabinets 12,

 rack of gas fire extinguishing modules 14,

 electric air valve 15 (air supply),

 electric air valve (heat dissipation) 16.

The automatic start of the diesel generator of the DG occurs through the DG start system.

The start-up system of the BKAE with DG is electric starter. It is designed to convert the electric energy of the starter at a mechanical moment for the promotion of the shaft of the unit at start-up. The system includes maintenance free starter batteries (SABs), an automatic charger and an electric starter. SABs are installed and fixed on the frame of the DG. Use of the Cummins diesel generator is possible.

The start-up process occurs automatically after the start signal arrives at the control panel. Rechargeable batteries are carried out using an automatic charger (AZU). The magnitude of the charging current is regulated on the front panel of the AZU within 30-100% of the nominal.

The start-up process occurs automatically after the “Start DG” signal arrives at the control panel.

The EA control panel is located and fixed on the DG frame (RCC 1301, RCC 2100, RCC 3100, RCC 3201).

The DG control panel (RCC 1301, RCC 2100, RCC 3100, RCC 3201) is a microprocessor-based system for monitoring, measuring and controlling the generating set. Management involves a simple operator interface with the generator set, digital voltage control, digital adjustment of the engine speed, engine start and stop, battery operation and generator set protection.

The control panel provides automatic control of the rotational speed and voltage at the output of the diesel generator; automated local and remote control of start and stop, pre-start and pre-start operations; automatic load reception in offline mode; automatic synchronization and load distribution during parallel operation of diesel generators with each other; automatic temperature control in the oil system and cooling system; indication of values of controlled parameters on the EA control panel; automatic alarms and protection.

The BKAE provides a mode of long-term parallel operation of several BKAEs as emergency sources of electricity, for which the block box is made with sealed inputs in the end walls for docking with other block containers.

Shield of own needs 6 (ЩСН) is designed to power and control the engineering equipment (auxiliary units) of the power plant and to provide, including, power supply to the UPS. The device is a metal cabinet of one-sided service, equipped with a door on the front side and fixed to the block box.

ShchSN provides

 DG auxiliary power supply;

 power supply of the fire alarm cabinet (ShPS) and automatic gas fire extinguishing system (AUGPT);

 UPS power supply

 power supply by fuel injection system;

 the issuance of signals to the control system for emergency stop DG;

 reception of signals from the control system (operation, malfunction, readiness for operation of the unit, etc.);

 power supply and manual and automatic control of lighting and heating of the BKAE premises;

 protection of auxiliary units;

 automatic and manual ventilation control of the BKAE premises;

 control of air valves and a fan according to signals from a gas fire extinguishing system, emergency shutdown of a diesel engine and stress relief from a ventilation system.

The auxiliary needs panel provides power supply to the UPS (= 24 V) and provides discrete signals from the corresponding sensors to the telemechanics and communication system about the presence of a malfunction of the auxiliary switchboard, the temperature regime of the DG room, the excess of the temperature regime, excess / decrease of the fuel level in the fuel system relative to the / lower level, respectively, about the excess / lowering of the oil level in the oil system relative to the upper / lower level, respectively, about a fire, a malfunction of the automatic fire alarm system ii, about unauthorized entry into the BKAE.

Generator shield 7 (ЩГ) is intended for control, monitoring and protection of the generator set ДГ. Branch boxes 8 are located under the thyroid gland.

Generator board contains means for electrical control of switching devices and their blocking (controllers and contactors).

The generator board provides the following functions: monitoring the mains voltage, automatic (remote) and local (manual) start and stop of the diesel engine. Switching on the generator input when the mains voltage disappears or leaves the permissible limits, automatically stops the diesel engine, disconnects the generator contactor and turns on the mains contactor when power is restored from the external network.

In the event of an emergency on the main power supply line at the command of the complete transformer substation (KTP) "ABC - Disconnected", "DG -" AVR ", the DG start cycle starts, the ATS switches to the backup line. After restoring the parameters of the main line, the ATS switches to its initial state (Main input), the engine stops (automatic shutdown of the power plant). DG is connected to SHGG buses, and SHG, which contains the automatic reserve input device (ATS), is connected to a complete transformer substation (KTP) through external SHGG buses. Complete transformer substation (KTP) is connected to the main external power supply.

In the complete transformer substation (KTP) there is a control and display panel for remote control to provide the ability to supply and disconnect voltage from the generator.

Connection to DG and KTP is carried out by means of isolated phase buses.

The SHGG with an automatic reserve input device (ATS) provides control of the mains voltage at the outlet from the diesel generator, automatic start when the mains voltage disappears or goes beyond the permissible limits, and turns on the generator when a command from the KTP about disconnecting the KTP circuit breaker, as well as turning off the generator automatic shutdown of the diesel engine when power is restored from the external network.

The fuel system includes a fuel consumable tank with a fuel harness and an electric booster pump; consumable oil tank with fuel harness and electric booster pump.

The cooling system includes a cooling unit, an expansion tank, a coolant temperature controller, a temperature switch, a hand pump, a coolant level sensor, an oil-water refrigerator, and pipelines fixed inside the box.

The cooling system provides automatic temperature control of the coolant.

The lighting system is made using LED lamps and luminaires and includes: working indoor, emergency indoor, repair and outdoor lighting.

Work lighting - from a network of 220 V of alternating current.

Emergency lighting is performed on LED lamps with UPS.

Repair lighting is made by a portable 24 V lamp with an LED lamp.

Outdoor lighting is made by a lamp with an LED lamp.

The BKAE heating system is based on electric convectors.

The heating system provides the possibility of putting the power plant into operation after it is inoperative at an outdoor temperature below + 4 ° C (227 K) with charged systems in the presence of an external power source.

The heating and ventilation system provides a temperature in the block box ranging from +10 to + 15 ° С.

For air intake and exhaust during DG operation, the power plant block-box is equipped with electrically operated controlled air valves.

The BKAE is equipped with a fire alarm and gas fire extinguishing system, the data is output to a remote control unit and an indication and control unit.

For warning of a fire in the BCAE and taking emergency measures to extinguish it, as well as for signaling unauthorized entry into a power plant, a fire warning system, an automatic gas fire extinguishing system (AUGPT) and fire alarm systems are used. The control part of the systems is installed in fire alarm cabinets (ShPS1 and ShPS2), fixed inside the block box.

The fire safety system can be performed in two versions:

 automatic fire alarm and automatic fire extinguishing.

The BKAE is equipped with a burglar alarm system with a remote signal transmission to a control room.

The work of a block-complete automated power plant (BKAE)

The BKAE works as follows: a diesel generator (DG) is connected to the generator board (SHGG) buses, and a generator shield (SHG) is connected to the complete transformer substation (KTP) through the external busbars of the generator shield (SHGG). Complete transformer substation (KTP) is connected to the main external power supply. (Fig. 3)

Remote control is carried out from a complete transformer substation (KTP), in which the control room is located: a control and display panel for remote control to ensure supply and shutdown of voltage.

The generator board provides reception from a diesel generator (DG) and transmission of electricity to consumers through a generator circuit breaker (AUG).

The generator board turns on the generator circuit breaker (AVG) after starting the control panel (EA) located and fixed on the frame of the diesel generator, if there is a command to turn on the generator circuit breaker (AVG) from the control panel (EA), the diesel generator (DG). The circuit breaker of the generator (AVG) is disconnected by command from a complete transformer substation (KTP). Generator board (SHGG) provides protection of the working generator from overload and short circuit, as well as receiving and processing information from the generator of the power plant, generator circuit breaker (AVG), from the auxiliary needs panel (SHSN) and from the remote control panel from the complete transformer substation (KTP) ), remote start and stop of the diesel generator (DG) using control devices located on the front side of the cabinet.

If there is voltage in the network at the complete transformer substation (KTP) (Signal "Automatic ABC On", automatic circuit breaker-ABC), the generator circuit breaker (AWG) is turned off.

When the supply voltage is cut off at the complete transformer substation (KTP), the “Start DG” signal is generated, which goes to the generator shield controller (SHG). The controller generates a signal for the PCC EA control panel and the diesel generator (DG) is started, while the generator circuit breaker (AUG) is turned off. When the signal “Automatic ABC is disconnected” (automatic circuit breaker) from the complete transformer substation (KTP) is received on the EA control panel (RCC), the signal “DG ready to accept the load” is generated. The generator circuit breaker (AUG) is turned on.

The BKAE provides a mode of long-term parallel operation of several BKAEs as emergency sources of electricity, for which the block box is made with sealed inputs in the end walls for docking with other block containers.

Benefits

The execution of the block box ensures normal operation, safe and convenient operation of the equipment, as well as the possibility of transporting the BKAE by road, rail and water transport and moving it using hoisting vehicles, increasing the reliability of power supply when working in difficult climatic conditions.

BKAE is a fully operational equipment.

The installation of the BCAE is carried out on a planned site on a pile foundation. Given the snow load of a particular region, it is recommended to install the BCAE at a height of 1-1.5 m above the site level.

The power supply from the VLZ - 10 kV line (high voltage line) is supplied through the air input towers.

The claimed utility model through the implementation of its features ensures the achievement of a technical result:

guaranteed uninterruptible power supply for responsible consumers of electricity, not allowing interruption in power supply.

The inventive utility model meets all patentability criteria for a utility model:

The BCAE is a single design connected by structural connections: all the hardware systems necessary for its operation and interconnected are located and fixed inside the block box.

The inventive utility model meets the patentability criterion of the utility model of “novelty”, since a similar technical solution has not been identified from known and publicly available sources of information.

To implement the utility model, well-known elements, materials and factory equipment were used, which indicates the compliance of this technical solution with the criterion of "industrial applicability".

List of accepted abbreviations

BKAE - block-complete automated power plant

DG - diesel generator

ЩГ - generator shield

ShchSN - shield of own needs

OPS - fire alarm

ShPS - fire alarm cabinet

AUGPT - automatic gas fire extinguishing system

ABP - automatic inclusion of a reserve

AVG - generator circuit breaker

ABC - circuit breaker

KTP - complete transformer substation

EA - control panel

UPS - uninterruptible power supply

SAB - starter batteries

AZU - automatic charger

Claims (3)

1. Block-complete automated power plant, containing a block box with hermetic inputs in the end walls for docking with other block boxes, consisting of one compartment equipped with an input in which a backup power source of an external network is located and fixed in the form of a low-power diesel generator , uninterruptible power supply, auxiliary shield connected with a generator shield, automatic power plant control system; automatic start-up control systems, while the power input busbars from the diesel generator are connected through the generator circuit breaker to the output buses through the generator board to the complete transformer substation, which is connected to the main external power supply to provide voltage supply and shutdown. 2. The block-complete automated power plant according to claim 1, characterized in that it includes 16, 30, 60 kW of the Cummins diesel engine. 3. The block-complete automated power plant according to claim 1, characterized in that it contains an insulated block box with ventilation openings, with air valves, systems: fuel, oil, exhaust, ventilation, heating, lighting and fire safety.

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