Introduction to automated diesel generator sets and various functions of the control cabinet

1. Automatic start: mains fault (mains phase loss, overvoltage, undervoltage, overfrequency, underfrequency) delay, starter group.

2. Automatic shutdown: when the mains power is normal, the unit will reduce the load, the mains power supply, and the unit will run for a period of time without load, and it will automatically shut down.

3. Self-locking function: when the unit fails, it automatically locks the starting circuit.

4. Automatic protection function: three times the unit starts failure, low oil pressure, high water temperature, overvoltage, undervoltage, overload, short circuit, overspeed, other faults (extendable).

Mains power loss (the input reflects the mains state of the dry contact closed), the unit is delayed for 3 seconds to start operation, after the unit starts successfully, the ATS is self-thrown to the unit side;

Mains power recovery (input to reflect the mains state of the dry contact open), unit cooling operation for 5 minutes automatic shutdown, ATS self-input to the mains side, unit cooling operation after automatic shutdown, mains abnormal, as the unit self-start condition is an optional function.

The control cabinet realizes the automatic switching of the power supply, the automatic judgment, the remote output, the input monitoring signal.

Automation is.

Automatic control of intake and exhaust air.

Power generation is automatic, shutdown is automatic.

Toggle automatic, there are also various information monitoring display, remote control, etc.

The control cabinet is to realize the automatic switching of power supply, automatic judgment, remote output, input monitoring signal.

Such as mains voltage, mains voltage, and current.

Oil pressure, water temperature, oil level, speed, etc.

Diesel generator control cabinet, generally have the following characteristics:

Reliable design and stable commissioning;

There are completely professional engineering designers, and debugging by hand, the debugging time is short, and the effect is excellent;

Safe wiring layout in full accordance with electrical specifications;

It has strong versatility and is suitable for the control of many different models and different capacities at home and abroad, such as Perkins, Volvo, Mercedes-Benz (MTU), Daewoo (Daewoo), Deutz (Deutz);

With microprocessor as the core, large-screen LCD with backlit Chinese display, touch button operation;

Accurate measurement and display function: real-time monitoring of electrical parameters, water temperature and oil pressure of diesel generator set and mains;

Control and protection function: realize the automatic start-up and shutdown, load switching and alarm protection functions of diesel generator sets;

Parameter setting function: allows the user to change the parameter setting, and at the same time memory in the internal flash memory, it will not be lost when the system is powered off;

It has the function of automatic control of intake and exhaust dampers (realized through the programming output port);

A variety of temperature and pressure sensors can be used directly, and the parameters can be customized;

It has the functions of real-time calendar, clock and running time accumulation;

Generator set cumulative output energy display;

A variety of starting success conditions are available;

Built-in speed frequency detection link, which can accurately judge the success of starting, rated operation, and overspeed status;

99 sets of historical records can be saved in a loop, and the records can be queried on the spot;

The power supply range is wide (8 35) VDC, which can adapt to different starting battery voltage environments;

The box and components are designed and manufactured according to imported specifications;

The internal integrated circuit board has a reasonable layout and a beautiful appearance.

Of course, the main functions of different control cabinets are also different, depending on your choice!

1. Manual control panel (standard configuration of the unit).

Provide the basic start and stop functions of the unit, and have the following basic configuration and functions:

1. Start and stop the controller.

2. Three-phase AC ammeter.

3. Voltmeter and selector switch.

4. Frequency meter, water temperature gauge, oil pressure gauge, schedule, battery voltmeter, 5, emergency stop button.

6. Alarm function: overspeeding, high water temperature.

7. Low oil pressure, charging failure.

8. Protection function: low oil pressure, high water temperature, overspeed, emergency stop and other preset protection.

2. There is no mains power (loss of voltage) self-starting control panel.

In addition to the standard manual control panel functions and configurations, the control panel also has an additional remote control interface.

1. Automatic stop manual function selection.

2. Start the delay relay (3 5 seconds, adjustable).

3. Shutdown delay relay (0 270 seconds, adjustable).

Secondary self-starting time relay.

5. Mains charger.

6. Alarm indication increases: low overspeed, output voltage failure, start failure, high water level pre-alarm, stop emergency stop.

7. Protection function added: low overspeed, start-up failure, output voltage fault (over-voltage, under-voltage, over-current).

3. Fully automatic remote monitoring control panel.

1. The LCD screen displays the operation steps, status, faults and nominal parameters of the unit 2, with RS232 or 485 interface, remote control, telemetry, remote signaling function 3, unit protection, automatic shutdown and alarm in the following situations:

Start failure, overspeed, low speed, high water temperature, low oil pressure, no signal from the speed sensor, charging failure, etc.

The automatic control cabinet is equipped with various electrical components such as automatic transfer switches, PLC programmable controllers, chargers, etc. The main functions are as follows:

1.Power failure auto-start function.

When the mains power is lost, the PLC sends a diesel engine start signal, starts the diesel engine to idle speed (800r min), runs at idle speed for 10 seconds, allows the diesel engine to be fully lubricated, and then accelerates to the rated speed (1500r min). If a start is unsuccessful, you can start again, up to three times in a row, if the three starts are unsuccessful, send out a start failure alarm (light flashing, bell).

2.Experimental function.

The test button is installed on the BKF panel, and pressing the test button can simulate the self-starting process of the diesel engine, which is convenient for the daily maintenance of the personnel on duty to check whether the unit function is normal.

3.Self-switching function.

The conversion between mains and power generation is automatically realized, and there is a safety interlock. And there are frequency, voltage, phase loss detection function, fire zero setting, fault alarm function.

4.Automatic battery charging function.

The cabinet is equipped with a charger, which usually uses the mains power to replenish the battery and supply power to the automatic control system at the same time. The battery is controlled by the PLC program to supplement the charging time, prevent overcharging or over-discharge, and prolong the service life of the battery.

5.Electric air switch.

The power generation and power supply of one of the production sites should be changed to electric closing, and interlocked with the mains, and the electric air supply should be installed inside the automatic control cabinet in order to control the interlock.

6.Mains power recovery function.

When the mains power is restored, it will automatically switch to the mains power supply. At the same time, the electric air switch is disconnected and a closing signal is sent to the main switch of the low-voltage cabinet of one of the transformers.

7.Speed down and stop function.

8.After the mains power is restored, the PLC controls the diesel engine to slow down to idle, and stops after running in the idle state for 2 minutes, so that the diesel engine can fully dissipate heat.

The automatic control cabinet of diesel generator set (as shown in the figure below) generally has the following functions:

1. Reliable design and stable debugging;

2. Safe line layout, in accordance with electrical specifications;

3. Strong versatility, suitable for the control of many different models and different capacities at home and abroad;

4. With microprocessor as the core, large-screen LCD with backlight Chinese display, touch button operation;

5. Accurate measurement and display function: real-time monitoring of electrical parameters, water temperature and oil pressure of diesel generator set and mains;

6. Control and protection function: realize the automatic start-up and shutdown, load switching and alarm protection functions of diesel generator set;

7. Parameter setting function: allow the user to change the parameter setting, and at the same time remember it in the internal flash memory, and it will not be lost when the system is powered off;

8. It has the function of automatic control of intake and exhaust damper (realized through the programming output port);

9. A variety of temperature and pressure sensors can be used directly, and the parameters can be customized;

10. It has the functions of real-time calendar, clock and running time accumulation;

11. Generator set cumulative output electric energy display;

12. A variety of successful starting conditions are available;

13. Built-in speed frequency detection link, which can accurately judge the success of starting, rated operation and overspeed status;

14. 99 groups of historical records can be kept in cycle, and the records can be queried on the spot;

15. The power supply range is wide (8 35) VDC, which can adapt to different starting battery voltage environments.

You can take a look at the following picture first:

It is mainly composed of a box, a diesel engine controller, an RPU560A security module, an AIN8 analog input module, a HEP300 electronic potentiometer, a H***00 power integrated protection module, a DOUT16B switching output module, an electronic governor, a BACM2420A charging module, a BAC2408 charging module, a shock absorber, etc.

The automation control cabinet of diesel generator sets needs to integrate digital, intelligent and networked technologies for the automatic control and monitoring of diesel engines. It can also carry out remote control of diesel generator sets: such as local start-up and shutdown, data measurement, alarm protection and three remote functions.

The control box shown in the above figure supports the remote control box of the CANBUS extension remote monitoring module (HMC9800RM) to realize remote monitoring of the engine.

1. The main functions include: ATS control function, setting control and remote monitoring of unit control parameters, unit parameter display, operation status display and other functions can realize the automatic start, automatic cooling shutdown, automatic alarm protection and other functions of diesel engine generator set.

2. Display and measurement of effective parameters: It can provide the actual value measurement of the parameters given by the generator set, and display the real data of the generator set, using high-brightness backlight, even in the dark, the display information can be clear at a glance.

3. Flexible and convenient control: the input sensor of CR series controller can provide standard curve and user on-site self-calibration, water temperature and oil pressure sensor can be selected, switch or modulus input, and the speed is obtained from the generator power supply or speed sensor, providing multi-directional control methods including total speed, excitation, lifting speed, shutdown, etc.

4. Sensitive response and high stability.

The CR series controller adopts a streamlined and efficient kernel program, which runs stably and reliably, and adopts the watchdog method to ensure that it will never stop.

5. Safety design: CR series control module adopts password control, when it is necessary to adjust or modify the parameters of the unit, it can be entered through the password, and it cannot be modified without input or input error, which ensures the safety of the unit operation.

6. Communication and software: CR series controller has communication function and adopts RS-485 MOBUS communication mode. It can be set to resist 1-255, the rate is 9600, all settings can be set directly by the computer through communication, and there are three output relays customized by the user and execute commands through communication.

Users can obtain the original operating software provided by the manufacturer free of charge.

7. Function selection: users can purchase some or all of the functions of the system to meet their own requirements.

Genset controllers are usually divided into: stand-alone controller, parallel controller, and genset dual power supply controller.

1. The single-engine diesel generator set controller is the most widely used product in the application of the generator set, which generally has the functions of starting, parameter detection, alarm, shutdown, etc., which fully meets the installation requirements and use standards of a single generator set. Ease of operation is one of the biggest advantages of a stand-alone controller.

2. The parallel controller of diesel generator set is mainly used when more than two (inclusive) units are running at the same time, and has many functions such as automatic synchronization, automatic load distribution, voltage sag adjustment, etc., which solves the defects of manual parallel operation in the past. Compared with the stand-alone controller, the parallel controller is more complete in functions.