CN214176992U

CN214176992U - Natural gas generating set grid-connected control system

Info

Publication number: CN214176992U
Application number: CN202022822586.3U
Authority: CN
Inventors: 温国生; 张珑瑜; 王正飞
Original assignee: Chongqing Googol Engine Tech Co ltd
Current assignee: Chongqing Pangu Power Technology Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-09-10
Anticipated expiration: 2030-11-30

Abstract

The utility model relates to a natural gas generating set control system that is incorporated into power networks, including the unit controller, through RS485 serial ports with the monitoring computer that the unit controller is connected, through the CAN bus with the display screen that the unit controller is connected, still include through the CAN bus with the speed regulator, ignition module, AVR interface card, blender control card and AIN8 extension module that the unit controller is connected, directly be connected with the second revolution speed transducer who establishes on the engine; the unit controller acquires U, V, W three-phase signals of the power generation input of the natural gas generator unit through the current transformer and is respectively connected with U, V, W three phases of the power generation input of the natural gas generator unit through fuses; the generator set controllers are also respectively connected with A, B, C three-phase input of a commercial power or other generator sets through fuses. The utility model discloses can guarantee that generating set operation is stable, solve the not enough problem of natural gas stand-alone generating set power supply volume.

Description

Natural gas generating set grid-connected control system

Technical Field

The utility model relates to a generating set, especially a natural gas generating set control system that is incorporated into power networks.

Background

As a high-quality, high-efficiency, safe and clean energy source, compared with coal-fired power generation, natural gas power generation hardly generates ash slag, hardly discharges sulfur dioxide and suspended particulate matters, causes low greenhouse effect and can improve the environmental quality. At present, natural gas generating sets are basically single-machine power generation. In some areas without commercial power and with large power consumption demand, single-machine power generation is obviously not free. And the control mode is mainly the unit controller plus the ECU control, and the unstable power situation often occurs. Therefore, the natural gas power generating unit is a problem to be solved.

The natural gas power generation grid-connected control system is disclosed in CN 204794126U, wherein a collector I is a collector at the side of a power supply terminal A, is connected with a switch a through a remote signal line and collects state information, and is connected with the power supply terminal A through RS485 and collects three-phase voltage, a natural gas power generation terminal B is a terminal with a carrier function, can receive the state information of the switch a and the three-phase voltage of the power supply terminal A collected by the collector I through a carrier channel and judge whether the collected information meets the running condition of a gas turbine unit, and if the collected information meets the condition, the gas turbine unit is started to drive a load; if the condition is not met, the gas turbine set is shut down; and whether the gas turbine set operates or not can be automatically judged under the condition of ensuring that the public power grid is disconnected or closed, so that the load can have enough power supply. The technical solution disclosed in this patent document is a useful attempt in the art.

Disclosure of Invention

The utility model aims at providing a natural gas generating set control system that is incorporated into power networks, it can guarantee that generating set operation is stable, solves the not enough problem of natural gas stand-alone generating set power supply volume.

A natural gas generating set control system that is incorporated into power networks, including the unit controller, through the RS485 serial ports with the control computer that the unit controller is connected, through the CAN bus with the display screen that the unit controller is connected, characterized by:

the device also comprises a speed regulator, an ignition module, an AVR interface card, a mixer control card and an AIN8 expansion module which are connected with the unit controller through a CAN bus, and the speed regulator, the ignition module, the AVR interface card, the mixer control card and the AIN8 expansion module are directly connected with a second rotating speed sensor arranged on the engine; the speed regulator is connected with a first rotating speed sensor arranged on an engine, the ignition module is connected with a sensor arranged on the engine, and the AVR interface card is connected with a voltage regulating plate of the generator;

the unit controller acquires U, V, W three-phase signals of the power generation input of the natural gas generator unit through the current transformer and is respectively connected with U, V, W three phases of the power generation input of the natural gas generator unit through fuses; the generator set controllers are also respectively connected with A, B, C three-phase input of a commercial power or other generator sets through fuses.

The natural gas generating set grid-connected control system further comprises a grid-connected electronic dog arranged on the set controller.

Further, a digital key, a clearing key, an input key, a forward mode selection key, a reverse mode selection key, a starting key, a stopping key, a fault clearing key, a mute key, a unit operation indicator lamp, a power generation switch indicator lamp, a power generation closing key, a load indicator lamp, a mains supply closing key, a mains supply switch indicator lamp, a mains supply indicator lamp, an interface operation key, a unit operation history record key, an alarm list key, an exit key and an entry/input key which are electrically connected with the unit controller are arranged on the display screen.

The utility model discloses a profitable effect:

the utility model discloses not only can the unit generate electricity and the motor electricity generation of being incorporated into the power networks, can control the parallelly connected electricity generation of multiunit moreover. The system unit controller, all the control modules and the expansion modules are in real-time communication, more engine operation parameters (pressure and temperature of an intercooler and cylinder temperature of an engine) are monitored, the engine can be better controlled and monitored, and the engine can operate more stably and safely.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of the arrangement of the keys on the display screen of the present invention.

In the figure: 1-current transformer, 2-first power generation switch, 3-second power generation switch/mains switch, 4-fuse, 5-speed regulator, 6-first speed sensor, 7-unit controller, 8-ignition module, 9-engine, 10-second speed sensor, 11-AVR interface card, 12-generator voltage regulator board, 13-mixer control card, 14-AIN 8 expansion module, 15-monitoring computer, 16-display screen, 17-grid-connected electronic dog;

18-number key, 19-clear key, 20-enter key, 21-forward mode selection key, 22-reverse mode selection key, 23-start key, 24-stop key, 25-fault clear key, 26-mute key, 27-unit operation indicator light, 28-power generation switch indicator light, 29-power generation closing key, 30-load indicator light, 31-mains supply closing key, 32-mains supply switch indicator light, 33-mains supply indicator light, 34-interface operation key, 35-unit operation history key, 36-alarm list key, 37-exit key, 38-enter/enter key.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the grid-connected control system for the natural gas generator set comprises a set controller 7, a monitoring computer 15 connected with the set controller 7 through an RS485 serial port, and a display screen 16 connected with the set controller 7 through a CAN bus, and is characterized in that:

the device also comprises a speed regulator 5, an ignition module 8, an AVR interface card 11, a mixer control card 13 and an AIN8 expansion module 14 which are connected with the unit controller 7 through a CAN bus, and are directly connected with a second rotating speed sensor 10 arranged on the engine; the speed regulator 5 is connected with a first rotating speed sensor 6 arranged on an engine, the ignition module 8 is connected with a sensor arranged on the engine 9, and the AVR interface card 11 is connected with a generator pressure regulating plate 12;

the unit controller 7 acquires U, V, W three-phase signals of the power generation input of the natural gas generator unit through the current transformer 1, and is respectively connected with U, V, W three phases of the power generation input of the natural gas generator unit through the fuse 4; the generator set controllers 7 are also respectively connected with A, B, C three-phase input by commercial power or other generator sets through fuses 4. Therefore, the LOAD (LOAD) can be connected with the natural gas generator set and the commercial power or other generator sets, so that the LOAD (LOAD) is ensured to have enough power.

The natural gas generator set grid-connected control system further comprises a grid-connected electronic dog 17 arranged on the generator set controller 7. The grid-connected dongle can manage the number of generator sets operating according to the load power.

The display screen 16 is provided with a digital key 18, a clear key 19, an input key 20, a forward mode selection key 21, a reverse mode selection key 22, a start key 23, a stop key 24, a fault clear key 25, a mute key 26, a unit operation indicator lamp 27, a power generation switch indicator lamp 28, a power generation closing key 29, a load indicator lamp 30, a mains supply closing key 31, a mains supply switch indicator lamp 32, a mains supply indicator lamp 33, an interface operation key 34, a unit operation history recording key 35, an alarm list key 36, an exit key 37 and an entry/entry key 38 which are electrically connected with the unit controller 7.

The control system has three modes of manual, semi-automatic (manual switching-on is needed) and automatic, a unit controller 7 is connected with a speed regulator 5, an ignition module 8, an AVR interface card 11 (connected with a voltage regulating plate of a generator for voltage regulation), a mixer control card 13 (air-fuel ratio control) and an AIN8 expansion module 14 (used for monitoring the inter-cooling pressure, temperature and engine cylinder temperature of an engine and communicating the inter-cooling pressure, temperature and engine cylinder temperature to the unit controller in real time) through communication lines, so that the unit controller can control a generator set more accurately, and the system is more stable.

When the data is abnormal, the display 16 will alarm shutdown and record. Some basic parameters of the system may be modified via the display 16. When the parallel operation type is selected, different parallel operation electronic dogs 17 (single-unit and commercial power parallel operation or multi-unit parallel operation) are required to be corresponded. The running state of the generator set is reflected in real time by a remote monitoring computer 15 of a client; the unit controller 7 is matched with a grid-connected electronic dog 17 (a multi-unit power generation grid-connected module is selected) to realize communication between the units through a CAN bus, and manages power generation of the units (multiple generator sets generate power).

Claims

1. The utility model provides a natural gas generating set control system that is incorporated into power networks, includes unit controller (7), through RS485 serial ports with monitor computer (15) that unit controller (7) are connected, through the CAN bus with display screen (16) that unit controller (7) are connected, characterized by:

the device also comprises a speed regulator (5) connected with the unit controller (7) through a CAN bus, an ignition module (8), an AVR interface card (11), a mixer control card (13) and an AIN8 expansion module (14), and is directly connected with a second rotating speed sensor (10) arranged on the engine; the speed regulator (5) is connected with a first rotating speed sensor (6) arranged on an engine, the ignition module (8) is connected with a sensor arranged on the engine (9), and the AVR interface card (11) is connected with a generator pressure regulating plate (12);

the generator set controller (7) acquires U, V, W three-phase signals of the power generation input of the natural gas generator set through the current transformer (1), and is respectively connected with U, V, W three phases of the power generation input of the natural gas generator set through the fuse (4); the generator set controllers (7) are also respectively connected with A, B, C three-phase input by a commercial power or other generator sets through fuses (4).

2. The natural gas generator set grid-connected control system of claim 1, characterized in that: the system also comprises a grid-connected electronic dog (17) arranged on the unit controller (7).

3. The natural gas generator set grid-connected control system of claim 1, characterized in that: the display screen (16) is provided with a digital key (18) electrically connected with the unit controller (7), a clearing key (19), an input key (20), a forward mode selection key (21), a reverse mode selection key (22), a starting key (23), a stopping key (24), a fault clearing key (25), a mute key (26), a unit operation indicator lamp (27), a power generation switch indicator lamp (28), a power generation closing key (29), a load indicator lamp (30), a mains supply closing key (31), a mains supply switch indicator lamp (32), a mains supply indicator lamp (33), an interface operation key (34), a unit operation history record key (35), an alarm list key (36), an exit key (37) and an entry/entry key (38).