This power plant is designed as main source.
The power plant consists of 14 sets of diesel generators with capacity of 3000KW per set, install capacity of 42MW.
The DG set is driven by diesel engine model DN8320ZD6 manufactured by NB ZC, which is the largest middle speed engine manufacturer in China;
The engine will use heavy fuel oil (380cSt/50°C)as fuel.
The design is according to the Chinese standard & code, in line with ISO/IEC standard. The project is designed under the merit of "advanced technology, highly efficiency, safety, economy and practicality".
The installation and the commissioning should be in line with the above standard & code.
Engineering design of the power plant, including power system, fuel system, lubricating oil system, starting air system, cooling water system, air intake & exhaust, compressed air system, control & measuring system, electrical system, etc;
The civil works of the power station and fuel storage are NOT included in Supply Scope. The Seller will provide the following drawings and technical information, which will assist civil consultant in designing the foundation and powerhouse.
Water for generator and exhaust boiler shall be softened according to the international standard and the Chinese standard (GB).
HFO (Heavy Fuel Oil) and diesel oil are the main fuel. The HFO need to be treated before entering the generator. The fuel treatment equipments for this power plant are designed according to heavy fuel oil.
Cooling water system for engine adopts close (two circuit) cooling system. Engine jacket cooling water uses fresh soften treated water, circulates by one engine driven water pump. Low temperature cooling water system adopts fresh water directly by electrical motor driven pump. Coolant in both circuit are cooled by the radiator.
The first line (Control room) is for the electrical control room, switchgear room, water soften treatment room and air compressor, air receiver. The second floor is for steam exhaust gas boilers and silencers, boiler is hypaethral layout. The distance of the columniation is 6 m; the span is 8 m, length is 108M and height is 4 m;
The second line (Generator hall) is for DG, lube oil tank, booster, etc, the span is 18m, length is 108m; there is a traveling double girder crane (10t) in the room.
The total area of control room is 864 square meters with length of 108m, width of 8m and height of 4 m. The roof of the control room is of reinforced concrete construction, and is flat roof that is convenient for installing equipments on it. One silencer and its bracket with weight of 1.2 ton are arranged for each generator, total are 14 sets, and total weight for 14 silencers is 16.8tons. An exhaust gas boiler with weight of 5 tons is arranged for every two generators, total is 6 boilers, and total weight for 6 boilers is 30 tons. For each boiler, girder for bearing the weight shall be arranged.
Inside the control room, there are HV switchgear room, LV control room, water soften treatment room and air compressor room. All HV and LV cables will be connected to switchgears or control panels through cable trenches in the control room.
Double deck sound insulation glazing with length of 1800 mm, width of 1500 mm, and thickness of 8 mm is installed on the control room wall facing to the alternator end of the generator. The bottom of glazing shall be 800 mm above the ground.
Ventilation for the control room adopts air conditioner.
The total area of steel construction main building is 1944 square meters with length of 108 m, width of 18m. The distance of the columniation is 6 m. A 10 tons double girder bridge crane with span of 16.5 m is installed in the generator hall. The installing height of columniation for crane railway is 7 m, and its total height is 9.6m. The maximum height of the main building is 12.8 m.
Model: 3000GF; Rated power: 3000kW; Rated speed: 750r/min; Weight for each generator: 55 tons including diesel engine 31 tons, alternator 18 tons and engine frame base 4 tons, coupling and accessory about 2 tons .
b. One set of fuel booster module for fuel viscosity control fit to every 5 gen-sets, total 3 sets modules;
C. Six sets of model CZ-20/30F air compressors, eight pieces of receivers with capacity of 500L for start air.
Cooling radiator is used for the power plant. The radiator is plate outdoor installation multiple fan double layer type.
Total area for oil storage is 1540 square meters with length of 11000 m and width of 14 m. The following oil storages are arranged:
a. Four heavy fuel oil storages with volume of 600 cubic meters, storage diameter of 9.55 m, height of 9 m, dry weight of about 60 tons and total weight of 660 tons for each oil storage. The intensity of foundation shall be fully considered.
b. One diesel oil storage with volume of 250 cubic meters, storage diameter of 7m, height of 7 m and total weight of 280 tons. The intensity of foundation shall be fully considered.
c. Two buffer heavy fuel oil tanks with volume of 100 cubic meters, storage diameter of 4.5 m, height of 6.5 m and total weight of 120 tons.
d. One daily HFO tanks and one daily DO tank with volume of 100 cubic meters, storage diameter of 4.5 m, height of 6.5 m and total weight of 120 tons.
e. One residual oil tank with volume of 30 cubic meters, diameter of 2.8 m, length of 6 m and total weight of 35 tons.
Fireproofing wall with height of 1.6 m is arranged around the oil storage, earthing for avoiding thunder-strike shall be considered for the oil storage.
Fuel oil unloading and HFO purified equipments is installed in the aux. room at fuel storage area.
a. One set HFO unloading pump station
b. One set DO unloading pump station
c. Four sets HFO purified separator
Rating of the D.G. set
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Manufacturer NB ZC Group LTD.
Type 4-stroke, direct injection, turbocharger, after cooler
Mean piston speed 9.5 m/sec.
Rotation seen from flywheel Clockwise.
Max. combustion pressure 155 bar (at rated power/speed)
Air temp. at turbocharger inlet 45 deg. C
Water temp. at charge air cooler inlet 32 deg. C
Beyond the abovementioned limiting conditions, deration to power as per ISO 3046 will be applicable.
Rated Power under site conditions mentioned above: Maximum continuous rating (MCR) 3600HP at engine crankshaft
The engine should be capable of accepting a sudden load as per the guidelines in ISO-8528-5-1993(e). As per this standard, the maximum sudden load increase stages are
During each of the above-mentioned stages of sudden loading, the transient speed drop will be restricted to a maximum value of 10% of the rated speed.
4.1.1. Alternator
The Alternator is self-excited, brush-less type in two bearing construction with single shaft extension and IP 23 enclosure. The alternator is fitted with bearing temperature detectors.
Technical data of alternator
- Rated output kVA 3750 KVA
- Power factor 0.8 lag
- Max. Alternator output at site 3000 KW
- Duty Continuous
- Rated speed 750 RPM
- Rated voltage 11000 V
- Rated Current 196.8A
- Efficiency at 100% load and 0.8 PF ‘≥96%
- Direction of rotation clockwise
- Number of poles 8
- Rated frequency 50 Hz
- Over-speed 20% for 2 minutes
- Overload capacity and duration 10%, for max. 1 hr in every 12 hrs
- Insulation class F
- Enclosure IP 23
- Temp. rise class F
- Excitation and AVR type Brush-less, AVR
- Connection Star
NOTE
Alternator design considers harmonics in load.
4.2 Governor system for DG
Woodward 2301D digital control and UG15 actuator are adopted for load sharing and speed control of diesel generator.
The 2301D is a microprocessor-based digital control. The control is housed in a sheet-metal classis and consists of a single printed circuit board. The 2301D is configured using a computer with Woodward Watch Window software. The computer connects to the 2301D through a 9-pin connector (RS 232 port). The control operates from a 24Vdc supply. The actuator output, one analog input, and one analog output are configurable. The 2301D features dual dynamics and soft load transfer, to and from a bus. The 2301D includes one load sensor circuit, one actuator driver, one MPU speed sensor, one configurable analog output, one configurable analog input, eight discrete inputs and four discrete outputs. The 2301D operates within a range of -40 to +70°C.
The 2301D provides load sharing and speed control of diesel generator. The 2301D has four operating modes - speed control, isochronous load sharing, droop base load, and isochronous base load.
Woodward UG-15 is a hydraulic powered electric actuator. The UG-15 provides the muscle for 2301D. The UG-15 takes a given electrical input signal and converts it to a proportional hydraulic output-shaft position to control engine flow.
4.3 Fuel Circuit system
Type of fuel:
The engines are suitable for operation on DO (Diesel Oil) / HFO (Heavy Fuel Oil or Furnace Oil with maximum viscosity 380 cst at 50 deg. C.);
While starting or stopping the engine DO (Diesel Oil) is used as fuel. When the water temperature at inlet to engine is more than 60 degree centigrade and HFO (Heavy Fuel Oil) is heated to the required temperature, the fuel can be changed from DO to HFO through a change-over oil tank.
Equipment fitted on the engine:
- Individual fuel injection pump for each cylinder with fuel rack & linkages.
- Individual injector fitted on each cylinder head.
- High-pressure injection pipes
- Main fuel rails for feeding and return.
- High-pressure pipe connection for each cylinder
Equipment delivered loose:
1) Four HFO separator module
2) Three fuel viscosity control modules (booster)
Each module consisting of:
Two electric motor driven fuel feed pump (one for working, one for standby);
Two electric motor driven fuel booster pump (one for working, one for standby);
One duplex type coarse filter;
One pressure-regulating valve;
One steam heater for HFO;
One flow meter for HFO;
One 3 way fuel changeover valve;
One viscometer & temp controller;
One emergency pressure safety valve;
One duplex type fine filter;
One mixing vessel with safety valve;
One pressure-regulating valve in fuel return;
3) Complete interconnecting piping with flanges, fasteners, valves, non-return valves, bosses, supports, etc as necessary up to Daily Tank.
FUEL CONSUMPTION (with 3 driven pumps)
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DN8320ZD6 Consumption at engine Cr. shaft
750rpm g/kWh
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100% Load 195.00
SITE -----------------------------------------------------------------------------
75% Load 200.00
CONDITION-------------------------------------------------------------------------
50% Load 210.00
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The values are subject to a 3% tolerance and apply when burning fuel with a net calorific value of 10,200 KCal/Kg minimum.
CLIMATIC CONDITIONS
ISO Conditions
Air temp. to turbocharger inlet 25 deg. C
Atmospheric pressure 750 mm Hg
Relative humidity 60 %
Water temp. at charge air cooler inlet 25 deg. C
Site Conditions (Assumed)
Air temp. to turbocharger inlet 45 deg. C
Atmospheric pressure 750 mm Hg
Relative humidity 60 %
Water temp. at Radiator outlet 52 deg. C
The heavy fuel oil from daily HFO tank and diesel oil from daily DO tank will be pumped to the mixing vessel on the booster module through two fuel feed pumps. After heated by steam, the heavy fuel oil (or diesel oil) with constant viscosity about 10-14 cst will be pumped to fuel main pipe. The booster module is used for controlling viscosity and supplying fuel for generators. Fuel-supplying capacity for each booster module is 4000 kilograms one hour (Maximum feed capacity is 6000kg one hour, return oil is 2000kg one hour). Return oil from each generator will back to the mixing vessel through return main pipe.
Fuel change between HFO and DO can be achieved through the 3-way valve on booster module.
4.4 Lube oil circuit system
Oil sump capacity (ltr)
The engine is equipped with a dry sump attached to the bottom of the crankcase. The lube oil for the engine is stored in a separate tank positioned away from the engine. This arrangement offers much more reliability than the wet sump arrangement.
The total oil capacity of this lube oil tank is 2000 liters.
Lube oil consumption
The average lube oil consumption is 0.8 g/kWh (+/- 0.2 g/kWh) at MCR at crankshaft for a well-run engine.
Equipment fitted on the Engine:
- One engine driven lube oil supply pump
- One engine driven lube oil transfer pump
- One pressure-regulating valve
- One lube oil thermostatic valve (option)
- Complete interconnecting piping with flanges, fasteners, valves, non-return valves, bosses, supports, etc as necessary.
Equipment delivered loose:
- 14 tanks for lube oil (2000 ltrs capacity) with interconnections to the engine.(according design)
- 14 electric motor-driven pre-lubrication pumps
- 14 manual lube pre-lubrication pumps
- 14 lube oil coolers
- 14 centrifugal lube oil filters (FLL75 bypass type)
- 14 lube oil duplex type filters
- Complete interconnecting piping with flanges, fasteners, valves, non-return valves, bosses, supports, etc as necessary.
4.5 Starting air circuit system
The DG is started by the compressed air.
Equipment fitted on the engine:
Compressed air starting equipment including:
- One compressed air filter
- One rotary distributor
- One air-starting valve in each cylinder head
- Connecting air piping on the engine
Equipment delivered loose:
- Six air compressors
- Eight air bottles of 500 ltrs (30 bar) capacity. This capacity is enough to start the engine 7 times without intermediate refilling of the receiver.
- Complete interconnecting piping with flanges, fasteners, valves, non-return valves, bosses, supports, etc as necessary.
4.6 Cooling water circuit system
The engine cooling is achieved by close cooling water circuit. It comprises a low temperature circuit and a high temperature circuit. The low temperature circuit includes the LT section of the charge air cooler, the lubricating oil cooler, and HT water cooler. High temperature circuit includes engine block, cylinder and turbocharger. The HT water temperature is controlled by thermostatic valve. Low temperature water circulates by a electrical motor driven pump which flows to the charge air cooler, lubrication cooler. Two high lay compensation tanks for coolant fill and gas eliminate in cooling system. All cooling water in system is been soften treated, and cooled by outdoor radiators.
Equipment delivered loose (for each generator):
- One electrical motor driven water pump
- One engine driven freshwater pump
- One lube oil cooler
- One injector cooler
- One water-cooled charge air cooler
- One compensation water tank
- One high temperature thermostatic valve
- One radiator
- Complete interconnecting piping with flanges, fasteners, valves, bosses, supports, etc as necessary.
4.7 Intake air and ventilation system
The air intake system is equipped with air filtration (ABB type installed on the engine) to clean air.
For 14 diesel generators, air consumption is 224000m3/h. 14 axial-flow explosion-proof fans opposite to each generator shall be arranged for the main building on the engine side.
The axial-flow fans are used for supplying air for the generators and reducing temperature in the engine room through convection. The quantity of heat dissipated from the generators is about 7560 MJ/h. The air will be discharged through natural ventilation on the upper side of the main building.
4.8 Exhaust gas and environmental impact mitigatory system
Air pollution prevent
All diesel engines for the power plant are acquired international air pollution prevent certificate according to the provisions of Annex VI of the international Convention for the Prevention of Pollution from ships, 1973, as modified by the Protocols of 1978 and 1997 relating thereto and of the Technical Code on Control of Emission of Nitrogen Oxides From Marine Diesel Engines.
Emission data as follows:
Applicable Nox emission limit (regulation 13 of Annex VI): 12.5g/kWh
Engine’s actual Nox Emission Value: 9.69g/kWh
Noise
The mechanical noise beside the diesel engine at a distance of 1 m is 112 dBA. The mechanical noise will be proofed and reduced by the main building.
The exhaust gas noise is reduced through a residential type silencer to 75dBA at a distance of 1 m.
The exhaust gas from diesel generator flows to exhaust gas pipe (DN450), pass a tee joint, and then divides two ways. One flows to silencer through a butterfly valve, another flows to exhaust gas boiler. When the exhaust gas boiler works, the butterfly valve for silencer will close and the butterfly valve for exhaust gas boiler will open, and then exhaust gas will vent from the chimney on the boiler. When the boiler cannot work normally or the boiler need to be stopped, the butterfly for boiler will close and the butterfly valve for silencer will open, and then exhaust gas will vent from the chimney on the silencer.
Six steam exhaust gas boilers are arranged for the power plant. One exhaust silencer (Residential type) is fitted to the each generator.
Equipment fitted on the engine:
- Lagged set of exhaust manifold with expansion bellows
- One ABB turbocharger.
- Exhaust outlet connection with expansion bellow.
Equipment delivered loose:
- 14 exhaust silencers
- 6 exhaust gas boilers
- Insulation /lagging/cladding for exhaust ducting
- Complete interconnecting piping with flanges, fasteners, t-joints, butterfly valves, bosses, supports, etc as necessary.
4.9 Steam system
Six exhaust gas boilers are arranged on the roof of control room. Heat exchange area for each boiler is 80 m2, steam capacity for each boiler is 700kg one hour at 170 degree centigrade and 0.7 Mpa. Steam from boilers will flow to steam main pipe and divide to separator and pump room, oil storage and main building through main steam distributor and steam distributors. The main steam distributor is located on the roof of control room, and other steam distributors are located beside the equipments need to be heated.
Drain trap is arranged on the end of steam pipe for equipment need to be heated.
Equipments for steam system:
- 6 exhaust gas boilers
- 12 water feed pumps
- 6 Steam distributors
- Insulation /lagging/cladding for steam pipes
Complete interconnecting piping with flanges, fasteners, t-joints, valves, bosses, supports, etc as necessary.
4.10 Water soften system for exhaust gas boiler
Two water soften equipment (double module) is arranged for the power plant, water treatment capacity is 4000kg one hour.
The water soften equipment adopts resin exchanger treatment system.
Equipments for water soften system:
- Two water soften equipment (double module)
- Two water feed pump
- One water tank
- Complete interconnecting piping with flanges, valves, bosses, supports, etc as necessary.
4.11 Electrical system
4.11.1 H.V. system
Fourteen 3MW/11kV HFO generators will work in parallel, supply electricity to one 11KV bus-bar and feed out through three main outgoing panels.
11kV generator system
Fourteen 3MW/11kV diesel generators are arranged for the power plant. For each one generator, the standard configure includes one switchgear for generator output and potential transformer, one control and operation panel (COP) and one local control desk (LCD).
The neutral of the generator is earthed through surge arrestors (standard delivery in China).
All generators are connected with a single bus-bar. An 11kV bus-bar PT panel is arranged for parallel operation. All 11kV H.V. panel adopt KYN28A-12 metal-enclosed removable switchgears, the switch for generator switchgear adopts VS1 vacuum circuit breaker (with truck), its rated current is 630A, and rated short-circuit breaking current is 25KA.
The generator bus-bar connects to 11kV outgoing panel. The switch adopts VS1 vacuum circuit breaker (with truck), its rated current is 2000A, and rated short-circuit breaking current is 31.5KA.
Generator switchgear
The generator connects to the bus-bar by vacuum circuit breaker in the generator switchgear.
Major Components in generator switchgear:
1) 3 pole truck type DC/AC 220V electrically operated motor energized VS1 VCB
2) Metering / Protection CT and PT
CT type: CT LZZBJ9-11 300/5A ith two windings for each phase
Two CTs are installed in the generator switchgear. One CT is for current and power measuring (phase A and C) and excitation adjusting (phase B); another is for 2301D load sharing controller.
PT type: one REL-11 100/�?3. 100/3 with two windings for each phase
One group of windings in potential transformers is star connected for measuring and protection system. Another group of windings is triangularly connected for single phase earthing protection.
3) Digital integrated relay
ICBU-360 digital integrated relay is adopted for gen-set protection, which is used for alternator protection, switch control, monitoring, measuring and display.
The following functions and protection can be carried out on the relay:
- Differential
- Voltage locked over current
- Reverse power
- Over current
- Single phase Earthing
- Over voltage
- Low frequency
- Over frequency
- Over load
- Accurate measuring of all operation parameters such as power, voltage, current, frequency, power factor and others
- Display the conditions of all switches
- Running record and failure storage
4) Local / Remote control selector
5) VCB ON/OFF
6) DSSX25 kWh and kVarh meter
Potential transformer panel
Major Components in PT panel:
1) Fixed PT installation truck with arrester.
2) PT type: one REL-11 100/�?3 100/3 with two windings for each phase
One group of winding in potential transformers is star connected for measuring and protection system. Another group of winding is triangularly connected for single phase earthing protection.
&n, bsp;
, The scope of electrical system consists of the, electrical equipments inside of main building. The Buyer takes responsibility to transmit power from the feed-out panel to user position.
4.11.2 L.V. system
The auxiliary equipments for generator include 14 radiator cooling fan motors (8.6KWx8x14), 6 air compressor motors (5.5kWx6), 3 booster (22kWx1) and two DC power source panel (4kW).
The auxiliary equipments for power plant include 2 HFO pump motors (18.5KWx2), 2 DO pump motors (18.5KWx2), 4 HFO separator module (11kWx4), 12 boiler water feed pump motors (2.2kWx12) and two soft water pump motor (3kWx2).
The lighting and air conditioner system is about 30kW, all lighting equipments are considered during civil work.
The fire fighting system includes 2 fire-fighting pumps (22kWx2) and one water feed pump (7.5kW). All fire-fighting equipments are considered during civil work.
The maintenance system includes one 10T double girder bridge crane (10kW) and maintenance electrical boxes (total 50kW).
4.11.2.1 L.V. power source for power plant
The electricity for the power plant is s, upplied by a 1600KVA transformer from the 11kV bus-bar.
4.11.2.2 DC panel
The power supply of control plant, protection, signal, automatic device and trouble lighting adopts 100AH direct current electrical source system.
220/24V DC battery charger of suitable capacity along with Lead acid type rechargeable batteries (12 V DC) is used. Charger is fully automatic, with float and boost charging facility. One set of DC/DC transfer module with 60A capacity for 24V output.
Major Components in the DC panel
1) Source inspect and change over module
2) Chargers and booster module
3) 12V batteries and battery detect unit
4) AC/DC ammeters, voltmeters
5) LCD operation screen
Protections provided for Chargers
6) Over load / short circuit / earth fault
7) Over voltage
4.11.3 Control system
DG
For each one generator, one control and operation panel and one local control desk are supplied.
Gen-set control and operation panel
The control and operation panel in the control room provides necessary Monitoring, Control and Protection functions for the DG set. It controls the Gen-set running according to the program set in PLC. All Gen-set’s running parameters such as voltage, current, power, power factor, frequency, and speed can be displayed on it.
Major Component in console
1) Control PLC
2) Speed Governor controller
3) Automatic Voltage Regulator
4) Engine Frequency Monitoring Unit
5) Meters
Ammeters (3 nos.)
Voltmeter with selector switch
Power meter
Frequency meter
PF meter
Analog Excitation fundamental ammeter
Analog Excitation harmonics ammeter
Counter for running hours
6) Operation and indicators
Push buttons, change over switches
VCB engaged indication,
Engine start permission indication
Excitation change over switch
DG VCB ON/OFF
DG VCB Trip and alarm indication
Engine Idling/Rating
Engine start
Engine normal and emergency stop
7) AVR
The integral AVR is designed for the TFW generator specially. It configures with stability adjusting, voltage adjusting, and gen-set paralleling reactive power sharing adjusting.
Input capacity AC 230V
Compare voltage AC 100V from PT AC
Current signal CT 5A from CT B
Max. Output DC.100V, 25A
Trigger Type Alternator exciter Remanence
Accuracy ±1%
Am. Temp -40~+60°C
Reactive sharing Auto regulating
8) T4500 auto synchronizer
SELCO T4500 auto synchronizer is designed for automatic synchronization between generator and bus-bar in a minimum of time by controlling the speed via the electric servomotor on the governor.
The T4500 measures the voltage across two phases on either side of the circuit breaker in order to obtain data on voltage, frequency and phase difference for closing the circuit breaker at exact phase accordance.
The synchronization function will become active when the difference between the bus voltage and the generator voltage is within limits. The voltage difference is selectable between 2% to 10%.
When the synchronization function is active, the T4500 will automatically adjust the speed of the generator through the governor in order to match the frequency to the bus-bar.
The T4500 will continuously adjust the generator speed until the frequency difference is within limits. When the voltage and frequency difference are within limits, the closing signal will be activated just before the next phase accordance, anticipating the circuit breaker make time. The T4500 compensates for this make time so that the circuit breaker will close exactly at zero phase.
Specifications for the T4500:
Circuit breaker operating time 20~200mS
Frequency difference 0.1~1Hz
Voltage difference 10%
Reference voltage 110/100V with voltage matching
Operating Temp -20~+70°C
Contact rating AC: 480V, 2A, 250VA; DC: 110V, 2A, 100W
Auto synchronization system is adopted between generators and network and among generators. Manual synchronization system is supplied for standby.
9) Load sharing
All generators can work in parallel; load can be equally shared among all generators automatically. Woodward programmable and configurable speed governor controller 2301D are adopted to control the engine, which can share or operate Gen-set in base load mode or isochronous mode.
Main functions on the control and operation panel:
- Starting engine
- Speedup
- Speed-down
- Generator switch ON/OFF
- Voltage adjustment
- Reactive power share
- Synchronization
- Voltage measuring changeover
- Lube oil pressure
- Water pressure
- Voltage
- Current
- Frequency
- Power
- Excitation current
- Speed
- Alarm
Local Control Desk
Local Control Desk is provided for monitoring pressure and thermal parameters of the running engine. Also starting, stopping and speed control of engine is possible in local control operation mode. It is located near the engine.
Major Components in Local Control Desk
1) Pressure gauges, switches
Lube oil filter inlet pressure
Lube oil filter outlet pressure
Lube oil in cylinder head inlet pressure
Cooling water pressure
2) Temperature indication
Cylinders cooling water temperature scanner
Cylinder cooling water outlet temperature measurement system with Cu50 thermo resistor for each cylinder and scanned by a multi-channel meter.
Engine exhaust temperatures scanner
Pyrometric exhaust gas system with thermocouple for each cylinder and turbocharger, and scanned by a multi- channel meter.
Lube oil engine inlet /outlet temperature
Water engine inlet/outlet temperature
3) Engine RPM indicator with cranking and over speed protection.
4) Push buttons, indicating lamps, selector switches
- Common engine alarm
- Engine start permission
- Local / remote mode select
- Engine start / stop
- Flasher off
- Engine speed raise / low
- Emergency stop
Central control panel
A central control panel is installed in the control room, which is used for displaying signals for auxiliary equipments including oil storage level alarm, water level alarm, oil temperatures, steam pressure and others.
4.11.4 Protection system
4.11.4.1 Diesel engine
The diesel engine will stop automatically in case of the following failures:
- Very low lube oil pressure
- Very high water engine outlet temperature
- Engine over speed
The diesel engine will alarm automatically in case of the following failures:
- Low lube oil pressure
- Low water pressure
- High lube oil temperature
- High water temperature engine inlet
- Alternator bearing temperature high
4.11.4.2 DG electricity system
The generator adopts digital integrated relay protection system for monitoring and protection.
An ICBU-360 digital integrated relay is installed on generator switchgear, which is used for alternator protection, switch control, monitoring, measuring, display and SOE record.
The following functions are configured on the relay:
- Differential current
- Reverse power
- Instant trip current
- Voltage locked over current:
- Over current
- Over load
- Earth failure
- Over voltage
- Under voltage
- Low frequency
- Over frequency
4.11.4.3 11kV electrical system
One DMR301 digital integrated relay is installed on 11kV-outgoing panel, the following functions can be carried out on the relay:
- Over current
- Instant current trip
- Running record and failure store
- Controlling switch on site or on remote mode
5. Main equipments specifications
