1、 Structure and working principle of generator set

500kw diesel generator set is composed of diesel engine, three-phase AC brushless synchronous generator, control panel, chassis and other components. The diesel engine flywheel is connected with the driving end of the generator through an elastic coupling, and the external part is connected with the connecting housing of the generator through the diesel engine flywheel housing, which is jointly installed on the common chassis through the shock absorber; The control panel is installed on the common chassis through the shock absorber, which is convenient for users to install, use and maintain.

The diesel engine for the unit is produced by Yuchai Co., Ltd. The intake mode of diesel engine is turbocharged and intercooled diesel engine, which is a water-cooled, 6-cylinder L-type, direct injection combustion chamber high-speed diesel engine. Its speed is 1500r/min, the speed regulation mode is electronic speed regulation, and the starting mode is DC24V electric starting.

The generator for the unit is Stanford SHSTF brand three-phase AC brushless synchronous generator. The generator is a horizontal, self-excited, constant voltage, brushless AC synchronous generator. The brushless generator uses a rotating armature type AC excitation generator to provide excitation power, which is rectified by a rotating rectifier and then provided to the main generator excitation winding. The power between the armature winding and the excitation winding of the generator in this structure is transferred by a rotating magnetic field. There is no mechanical contact part and no electric spark will be generated. The automatic voltage regulator is used to control the voltage. Therefore, The generator has excellent voltage performance index, reliable operation and simple maintenance, which can meet the requirements of high electricity use.

2、 Manufacturing standard of generator set

1. GB/T2820.1-1997 Reciprocating Internal Combustion Engine Driven AC Generator Set Part 1: Purpose, Rating and Performance

2. GB/T2820.3-1997 Reciprocating Internal Combustion Engine Driven Alternator Set Part 3: Alternator for Generator Set

3. GB/T2820.4-1997 Reciprocating Internal Combustion Engine Driven Alternating Current Generator Sets Part 4: Control and Switching Devices

4. GB/T2820.5-1997 Reciprocating Internal Combustion Engine Driven AC Generator Set Part 5: Generator Set

5. GB/T2820.6-1997 Reciprocating Internal Combustion Engine Driven AC Generator Set Part 6: Test Methods

6. GB/T12786-1991 General Specification for Automatic Diesel Generator Sets

3、 Technical parameters of generator set:

Project name, specification and data

Unit model 500-GF

Output voltage 400V/230V

Rated current 900A

Rated frequency 50Hz

Steady state frequency adjustment rate ≤± 1%

Adjustment rate of transient frequency ≤± 10%

Voltage fluctuation rate ≤± 0.5%

Stable voltage regulation rate ≤± 1%

Adjustment rate of transient voltage ≤± 15%

Frequency stabilization time ≤ 3S

Rated speed 1500rpm

Power factor COS Φ= 0.8 (lagging)

Starting mode Electric starting

Speed regulation mode Electronic speed regulation

Fuel consumption 208g/kw · h

Overall dimension 3700 * 1000 * 1820 (L * W * H mm)

Unit weight 3850kg

4、 Technical parameters of diesel engine

Project name, specification and data

Brand/Origin Yuchai Shares

Diesel engine model YC6TD780L-D20

Maximum power of diesel engine 572KW

Starting mode: DC24V electric starting

Bore stroke 152 * 180mm

Number of cylinders/dare lift structure 6/L type

Cooling mode Closed water circulation cooling

Oil supply mode: direct injection

Rotation direction counterclockwise

Rotating speed 1500rpm

Air intake mode Air air intercooling

Maximum coolant temperature (℃) 98

Free acceleration smoke (Rb) ≤ 1

Oil consumption rate (g/kW. h) ≤ 1

Fuel consumption rate under rated working condition g/kw. h ≤ 208

Compression ratio 14:1

Diesel engine weight 2250kg

Engine oil grade CD 15W/40 GB11122 diesel engine oil

Diesel fuel grade:

Areas with minimum temperature ≥ 4 ℃

GB252 No. 0 Light Diesel Oil

GB252 No. 10 light diesel oil in areas with minimum temperature ≥ - 5 ℃

GB252 – 20 light diesel oil in areas with minimum temperature ≥ - 14 ℃

GB252-35 light diesel oil in areas with minimum temperature ≥ - 29 ℃

GB252-50 light diesel oil in areas with minimum temperature ≥ - 44 ℃

5、 Technical parameters of brushless generator

Project name, specification and data

Brand Stanford SHSTF

Model KHI500

Rated power: 500kw

Rated voltage 400V/380V

Rated current 900A

Output frequency 50Hz

Protection grade IP22

Connection mode: three-phase four wire, Y-type connection

Regulation mode AVR (automatic voltage regulator)

Telephone harmonic coefficient THF:<2%

Excitation mode Brushless self excitation

Output factor COS Φ= 0.8 (lagging)

Insulation class H

6、 IV. Technical Parameters of Protection Electronic Control System

Control system brand Zhongzhi

Type Generator set integrated control meter box

Display mode LCD

Diesel engine monitoring items: oil pressure, water temperature, engine speed, battery voltage and frequency

Voltage, current and three-phase detection of generator monitoring project

Integrated monitoring KVA, KW, KVAR, KWh, KWArh

Protection function Alarm, tripping, protective shutdown and emergency shutdown under abnormal conditions such as low oil pressure, overspeed, high water temperature and overcurrent of the generator set

500kw diesel generator set from Jump $36800

50kw diesel generator set from Jump $3700

800kw diesel generator set from Jump $61800