Advantages, characteristics and general situation of diesel generator set

The diesel generating set is composed of a diesel engine, a three-phase AC synchronous generator, a control cabinet and various auxiliary parts. Is a technology intensive, mechatronic products. The utility model can effectively guarantee the continuous, normal, stable and safe use of electricity.

1, advantages:

(1) when the fuel economy, thermal efficiency and working conditions change, the fuel consumption rate curve is relatively flat, and the economy is low under low load

(2) reliable and durable. Because there is no ignition system, the fault is low

(3) wide range of use;

(4) harmful emissions are lower

(5) fire safety is good

The generator automatic voltage regulation type is: thyristor, phase compound excitation, TD1 type carbon resistance automatic voltage regulation, and individual use high power tube

2, characteristics:

(1) single machine capacity class is more. The international unit is from several thousand kilowatts to several million kilowatts, and the domestic unit is several thousand kilowatts

(2) the supporting equipment is compact in structure and flexible in installation location (water cooling as long as 34~82L/KW H 1/10 of steam turbine)

(3) high thermal efficiency and low fuel consumption (heat efficiency 30~46%);

(4) start quickly, and can quickly reach the full power of only a few seconds, emergency within 1 minutes with full load (normal 5~30MIN), the shutdown process is short, you can frequently stop.

(5) maintenance, simple operation, fewer people, easy maintenance during the standby period

(6) the comprehensive cost of construction and power generation of diesel generating set is lowest

3. Technical characteristics of diesel engine

1) 50HZ determines speed 300015001000750500, 375300

2) output voltage 400/230, 50Hz, cos, Phi =0.8

3) the power change is wide, 0.5KW~10000kw 12~1500kw can be used as mobile power, spare power supply fixed or marine power station as a common power supply, power up to tens of thousands of KW

4) have a certain power reserve. 10~20%, standby power nominal 12 hours power, common power supply for continuous power

5) equipped with speed regulating device

6) it has higher power supply reliability and automation function

4. Classification of diesel generator sets

Classification：

Fuel

speed

Condition of use: F land use FC marine Q automobile T Trailer

Application: General standby emergency readiness

Output voltage and current: G--, power frequency 50HZ P, AC intermediate frequency (400HZ) S, AC dual frequency, Z- DC

Generator excitation mode:

The rotation of AC exciter excitation system; magnetic system shunt rectifier AC brushless excitation system; W; static AC exciter excitation system; voltage source static exciter excitation system; AC side series composite voltage source static exciter excitation system; harmonic (or fundamental) guidance winding excitation system; S (three harmonic)

Control mode division:

Field operation; compartment operation; automatic diesel generating set (10~15 seconds to restore power supply); unattended machine; low noise; low emission

Setting: TH wet tropical type

5, equipment type

1) diesel generator model

Such as: ZHS300GF (zhaohang Shangchai 300KW diesel generator)

Company brand + diesel engine brand + output power + generator type

2) diesel engine model

3) generator model

TF (synchronous) + design sequence + excitation mode

ZH - self excited constant voltage X uncontrollable phase compound excited K controllable phase compound excitation

6. Main Electrical Indexes

1) the setting range of no-load voltage is Uz 95%~105%

2) cold and hot state voltage changes

Controlled phase compound excitation +-2%

The controllable phase compound excitation < = +-5%

7, environmental conditions and power correction

Irrespective of vessel