Diesel generator automatic control system is introduced

The system structure

Diesel generator set automation control system controlled by the program control, analog control and operation management of three parts.

Process control.It is according to the designed in advance to control the sequence of operation.Plays a role of discrete control signal, the parameter is the switch quantity.The form of control signal, usually derived from several operation logic operation results.Such as starting and stopping of the unit, it belongs to the process control

Analog control.By measuring the actual value of the equipment operation parameters, compared with the set value, according to the deviation, adjust the equipment corresponding physical quantities to realize control and regulation., the parameters of the control signal is continuous work is usually analog, he can also through the way of time sampling is transformed into the discrete amount of time, but no matter how big is the deviation, should follow the setting continuous adjustment.Such as frequency and voltage regulation, belong to analog control.

Control of operation and management.According to the requirements of various operation conditions of artificial setting and load of the practical need of, in accordance with the order to invoke various automatic device or program accordingly, for diesel generating sets, achieve the goal of security control and economic operation.This is called the control of operation and management.

System advantage

The remote monitoring and control

No matter anywhere in the world, as long as there is network, can use mobile phone or PC computer remote monitoring the operation of the generator set data, control the operation of the generator set;In addition to basic information monitoring unit, a more comprehensive monitoring, such as the excitation voltage;Bridge output voltage;Bearing temperature;Winding temperature, etc.A more comprehensive monitoring for better check the health status of the unit.

Remote fault diagnosis
Example: when the generator set start failure problems, manufacturers and technical personnel through the PC or cell phone APP, quickly check user unit in the process of starting failure every second data (with the fault diagnosis of the demo APP), such as: the boot process speed is how much?The oil pressure to achieve?The battery voltage reduce how much?How much is the charge of mechanical and electronic pressure....Technical personnel through the data can be easily remote some troubleshooting, for some simple failure or user improper use, can be solved quickly.

Through the remote fault diagnosis, reducing for fault situation of communication between manufacturers and users, manufacturers directly through the cloud server get 18 seconds of black, rapid analysis of the cause of the problem, rapid troubleshooting, reduce after-sales service costs, improve service efficiency and quality.

The early failure prevention
Through the cloud server built in more than 130 fault model, fuzzy reasoning, discover the early failure of various complex, improve the reliability of the unit.And can be controlled by continuously increase cloud server failure model of the knowledge, achieve the infinite extension diagnosis ability.

Intelligent data fetching patent technology
The generating set in real time and more comprehensive monitoring, intelligent fetching data, such as the excitation voltage;Bridge output voltage;Bearing temperature;Winding temperature data.To realize the remote fault diagnosis and early fault diagnoses.Many data summary and displayed in the form of chart.

Classification system
Diesel generator set automatic control system can be divided into the following four categories:

The first kind of control mode is the relay and semiconductor device logic control, simple and effective work.Its disadvantage is that the components, complex circuit, big volume and poor reliability.If need to increase function, need to modify the control circuit.

The second type of control method using programming controller is used to replace logic circuits, semiconductor devices in the first way to standardize the hardware, use special-purpose language makes programming easier;Using software change control circuit, it is very convenient.With large scale integrated circuit reduce number of components and software has self-checking function, improve the reliability.

The third type of control mode is to use micro computer to replace manual operation management, formed the program controller, standardization of analog controller and the combination of the microcomputer.The start-stop, parallel solution column and the load distribution, etc. As independent units connected to the microcomputer, using software to implement the whole process of automatic control, operation more convenient.But need to backup measures, avoid cause out of control in computer failure occurs.

The fourth kind of control method is to use a microcomputer or programmable controller (PLC) to realize the diesel generator set power station automation control.Hardware composition is simple, but reliable backup measures must be considered.This way, make full use of computer technology, make ordinary units change for automation units.It can realize control, also can undertake data processing and scientific computing, and its computational speed and accuracy completely, meet the control requirements.Its outstanding advantage is that the 3 control program stored in memory, the connection is limited to detect connected devices, actuators, simplifies hardware and wiring, and thus its high reliability and wide adaptability, convenient debugging and maintenance.Therefore, the fourth kind of control mode is the development direction of diesel generating sets automation control system.

System function
(1) automatic remain ready to run.
(2) the automatic start and load
(3) automatic parallel with columns
(4) auto supplies
(5) automatic stop
(6) the unattended time
(7) automatic protection
(8) other

Diesel generator set automation control system of the grading
Diesel generator set automation control system designer or user, we should departure from the actual situation, according to the requirement of specific diesel generating set must have automatic control function.Our country to the rated power is not more than 3200 kw stationary automatic diesel generator set (GB/T4712-1996 standard for automatic diesel generating set classification requirements and diesel generating sets according to the degree of automation can be divided into level 3;
(1) the level of automation of the performance of the diesel generating set is as follows:
1) a single generator automation for emergency power supply.Maintain a constant voltage and frequency during the run.
2) generator set should be run automatically maintain emergency standby state (battery charged automatically; air cylinder automatic inflatable), diesel engine, automatically prelubricated before launch.
3) when the generator set to start, run or stop, can realize the automatic start, run by automatic control instruction or downtime.
4) generator set in the process of running, if appear overload, short circuit, speed, high frequency, water temperature, oil pressure too low anomalies, can automatic protection.
5) generator set should be equipped with showed that normal operation of the acousto-optic signal system, through these instructions signal and alarm signals show that operation of the unit.
6) generators in the case of unattended should be able to run continuously for 4 h.
(2) secondary automatic diesel generating sets besides satisfying the requirements level automation unit, also should have the following features:
1) generating units should have the function of the automatic fuel, oil and cooling water supplement.
2) generators in the case of unattended, can run continuously 240 h.
(3) three-level automatic diesel generating set in addition to satisfying the requirements of a, level 2 automation units, also must have the following features:
1) when the generator set since the launch failure, since the launch control system program, will start the instruction should be automatically transferred to the other a backup unit.
2) according to automatic generating set should be able to control instructions or remote control to complete two same specifications of the generator automatically tied for reconciliation.
3) generator set in parallel, should be able to automatically allocate the output of active power and reactive power.
Besides having a 4) generator set, level 2 automation units in all kinds of protection, should also have the function of reverse power protection, etc.
Three level 3 automatic generating set three may form a power plant automation.The two commonly used power supply unit, do a backup, so should add functions related to the parallel operation.Automation control system should be based on load and run please condition, three sets of generating set automatic sequence start-stop, parallel, columns and load distribution.Fault is divided into two levels: level 1 for light failure, should realize uninterrupted power supply, namely put standby generator in parallel operation, to stop the defective generator set.Secondary major fault, emergency stop the defective generating set at the same time, immediately put into standby generator set, to allow the interruption of power supply to load.