Shore power

Table 2 – Typical system requirements for different ship types and sizes

Power shore hidrosilindirli dayaqlar

The equipment can operate with ship power generator off, or with ship power generator on by seamless transfer.

It has standard safety protection system such as reverse-power protect and high overload ability.
Voltage closed-loop control, output voltage can keep stable when the load is abrupt

Patented VSV technology, can be used as SVG for reactive power compensation of port power distribution when idle

The only one Chinese Company who passed the SIL2 certification in this industry.

NC AMP L series shore Power

Output Voltage: 380V, 690V
Rated capacity: 100-8000kva
Main features
Modular design, Power cell parallel connection, no need reactor
Rectifier can choose diode type or IGBT PWM

The equipment can operate with ship power generator off, or with ship power generator on by seamless transfer.

It has standard safety protection system such as reverse-power protect and high overload ability.
Voltage closed-loop control, output voltage can keep stable when the load is abrupt

NC AMP H series shore power
Input	Voltage	3P,3-10KV
	Frequency	50HZ/60HZ +/- 10%
	Allowable voltage fluctuation range	+/-20%
Output	Voltage	6kv,6.6kv (others for option)
	Frequency	50hz/ 60hz
	Overload capacity	120% 1min
	waveform	Multi-level PWM, sine wave
Performance	Input	THDi
	Output	THDU
	Efficiency	>= 98%
	Power factor	>0.96 (rated capacity)
	MTTF	>50000Hours
Working condition	Enviorment	Indoor or outdoor with containerized cabinet
	Temperature	-15 – 40℃
	Humidity	95% without condensation
Control	Control method	constant frequency & voltage output, voltage close loop
	frequency resolution	0.01hz
	Fieldbus	Profibus, Modbus…
Others	Protections	over-voltage, over-current, overloading, transformer overheating, grouding error, fan error, safty lock
	Protection level	IP31， others for option
	Noise level
	Cooling system	Air/ water
	Options	Containerized cabinet, output isolation transformer, junction box, bypass cabinet
NC AMP L series shore power
Input	Voltage	3P,380-690V
	Frequency	50HZ/60HZ +/- 10%
	Allowable voltage fluctuation range	+/-10%
Output	Voltage	440V (others for option)
	Frequency	50hz/ 60hz
	Overload capacity	120% 1min
Performance	Input	THDi
	Efficiency	>= 97%
	Power factor	>0.95 (rated capacity)
	MTTF	>50000Hours
Working condition	Enviorment	Indoor or outdoor with containerized cabinet
	Temperature	-15 – 40℃
	Humidity	95% without condensation
Control	Control method	constant frequency & voltage output, voltage close loop
	frequency resolution	0.01hz
	Fieldbus	Profibus, Modbus…
Others	Protections	Short circuit, overvoltage,overcurrent,overloading, undervoltage, phase lose, overheating
	Protection level	IP11， others for option
	Noise level
	Cooling system	Air cooled
	Options	Containerized cabinet, output isolation transformer, junction box, bypass cabinet

Shore power

When a ship docks, it no longer needs energy for propulsion. However, ships may still be large consumers of energy when stationary as several of the ship functions are still operating. This includes ventilation/heating/cooling, pumps, control systems and cargo handling systems. Consequently, the generators are running when in port, resulting in local noise and air emissions as well as global climate driving emission. Rather than letting the generators on board make the electricity this can come from shore power.

Applicability and assumptions

Pawanexh Kohli (Own work) [CC BY-SA 3.0 or GFDL, via Wikimedia Commons]

Shore power can be installed for all types of vessel and for all ages with need for power in harbour, and has been used for years especially for smaller vessels, but also some larger passenger vessels.

For smaller vessels to draw power from the land based mains supply when docked is not a new phenomenon. Shore power has been used extensively for many years for vessels with moderate power requirements; typically less than 50 to 100 kW. These vessels are capable of making use of normal grid voltage and frequency, and replace the energy from the generators with the shore power with only marginal investments.

For the larger vessels with higher power requirements (100 kW up to 10 to 15 MW) it gets a bit more complicated. To serve these vessels with shore power, dedicated and relatively costly installations are required, both on land and on board the vessels. This may include upgrading the grid capacity, frequency converters and complex high power connectors. Consequently, relatively few vessels and ports are capable of making use of shore power, even though the environmental upsides are considerable. Still, cold ironing may be regarded as a mature technology that has been in regular use since the 1980s.

Shore power may potentially eliminate the local noise and air pollution related to ship activity in a port. Depending on the energy source, it may also contribute positively to the climate driving effects of ship operation, but as an isolated initiative, it is generally not considered to be among the most cost effective climate initiatives.

On the land side, the high power cold ironing system consists of the following:

• High voltage grid to the port
• Frequency and voltage convertors/transformers
• Control panels and connection boxes
• Cable reel and connectorsOn the ship side the following will have to be installed:
• The grid power solution and the frequency converters typically represent the costliest elements on the shore side. Depending on the availability of grid power and the power requirements, the cost of installing shore power on the shore side will vary considerably.

• Transformer
• Power distribution system
• Control panel
• Frequency converter (optional for greater flexibility)
• Connectors and cable reel (optional for greater flexibility)

Table 1 – Typical system specs for the different power requirements

Power Capacity	Typical spec
	230/400/440V – 50/60hz
100 – 500kW	400/440/690V – 50/60hz
500-1000kW	690V/6.6/11kV – 50/60hz
>1MW	6.6/11kV – 50/60hz

Table 2 – Typical system requirements for different ship types and sizes

Vessel types		1000 – 4999 GT	5000 – 9999 GT	10000 – 24999 GT	25000 – 49999 GT	50000 – 99999 GT	>= 100000 GT
Oil tankers	230/400/440V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz	690V/6.6/11kVV – 50/60hz	690V/6.6/11kVV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz
Chemical/product tankers	400/440/690V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz
Gas tankers	400/440/690V – 50/60hz	400/440/690V – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz
Bulk carriers	230/400/440V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz
General cargo	230/400/440V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz
Containers vessels	400/440/690V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz
Ro Ro vessels	230/400/440V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz	690V/6.6/11kVV – 50/60hz	6.6/11kV – 50/60hz
Reefers	230/400/440V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz
Passengers vessels	230/400/440V – 50/60hz	400/440/690V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz
Offshore supply vessel	230/400/440V – 50/60hz	400/440/690V – 50/60hz	6.6/11kV – 50/60hz
Other offshore service vessels	230/400/440V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz	690V/6.6/11kVV – 50/60hz	690V/6.6/11kVV – 50/60hz	690V/6.6/11kVV – 50/60hz	690V/6.6/11kVV – 50/60hz
Other activities	230/400/440V – 50/60hz	400/440/690V – 50/60hz	690V/6.6/11kVV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz	6.6/11kV – 50/60hz
Fishing vessels	230/400/440V – 50/60hz	400/440/690V – 50/60hz	6.6/11kV – 50/60hz

Cost of implementation

Table 3 – Estimated cost for implementing shore power on board vessels