Shallow talk about the security in handing in dc to mix small electrified wire netting

4MW, 2 5kW wind-force generates electricity system, acerbity batteries of lead of a 250kW/800kWh store can system, 1 hands in power transformation of dc small electrified wire netting and net to wear a system, highest negative charge exchanges inside the system about 1.

2MW, highest bear makes an appointment with dc 0.

9MW. Next graphs attack for this project develop graph. Normal Align=center> pursues 1 high density spends distributed the sources of energy to receive dc to mix develop of project of technology of key of small electrified wire netting to attack graph Normal >normal > can see, this project uses structure of monolayer dc generatrix, about 0.

System of 85MWp smooth hot season receives bus bar of dc of electrified wire netting of in a subtle way through DC/DC deflector, 1.

0MWp smooth hot season receives electrified wire netting of in a subtle way to communicate bus, make an appointment with group of 800kWh lead acerbity batteries to maintain dc generatrix voltage to stabilize, make sure small electrified wire netting leaves a net stable to move. Two-way AC/DC is used to change between communication generatrix and dc generatrix stream implement join, dc generatrix gives electric car to charge through voltage of DC/DC convertor commutation the dc bear such as equipment of illume of picket, LED, workshop has power supply. This new pattern that demonstrative project offerred high density to spend distributed the sources of energy to be received, the stability of security of new energy resources such as report of the bend over that it is light, wind received big electrified wire netting to clear away technical obstacle, realize those who hand in dc to mix side of user of small electrified wire netting to commercialize operation first in home, can contented henceforth power user diversification sexual demand. What new technology brings subsequently is issue of new the safety that use phone, dc used device of many shift of electric power electron in distribution system, electric power environment is more complex, the low-pressure protection electric equipment that uses generally in communicating distribution system so apparently cannot continue continue to use, with the ground connection breakdown in distribution system protection is exemple, the communication distribution system that receives local form to using TN, TT, IT, use protection of odd electric current commonly. Protector of AC of traditional electron type odd electric current uses 0 foreword transformer to detect leakage of electricity, electromagnetism of Faraday of basis of 0 foreword transformer is faradic, flux change generation is faradic, can be opposite only the odd electric current that exchanges part undertakes protective. Graph protector of electric current of the rest of 2 family expenses and its interior Normal > and communication distribution department consolidate model, the ground connection form of dc distribution system also is divided for TN, TT, IT, because shed the equipment that use phone to ask to power supply source continuously,be negaive electricity source or positive electricity source likely, because there are the two lines of two power supply cords in this distribution system,be made or increase a lead intermediate (M line) 3 lines distribution is made. Pursue below the 3 systematic diagram that are form of ground connection of the TT with distribution commonly used system, IT. Graph the ground connection breakdown of the dc distribution system that diagram of system of form of ground connection of the TT with commonly used system of 3 dc distribution, IT is aimed at form of ground connection of the TT that uses land of power source termination, TN defends, using odd electric current to protect still is best means, released IEC TS 63053:2 to this IEC017 " General Requirements For Residual Current Protective Devices For DC Systems " . Protector of electric current of this dc the rest (DC-RCD) threshold value of protection of standard regulation set is the least 20mA, the biggest 1A. Standard of graph 4 DC-RCD IEC is handing in dc to mix side of load of the dc in electrified wire netting, protector of apparent and common AC odd electric current cannot finish protection, need uses DC-RCD to undertake dc leakage of electricity is protected, at present protection of dc leakage of electricity has not been popularized and commercialize however, home still also does not have relative standard. Actually, in handing in dc to mix small electrified wire netting, composition of leakage of electricity is very complex, next ABB mix what breakdown of side ground connection communicates in small electrified wire netting to emulate a model to delivering direct current in light of us. Graph 5 hand in dc to mix the rest of breakdown of ground connection of side of communication of electrified wire netting voltaic loop Normal > can see, if communicate attaint of load happening insulation, the odd electric current of generation has communication part not only, still have dc part, if still use protector of AC leakage of electricity according to inertial thinking,communicating laden end to undertake protection of leakage of electricity is no good apparently, cannot detect not only dc leakage of electricity, even the dc leakage of electricity of overlay can be brought about detect magnetism core is magnetized beforehand, bring about buckle a value to increase, the former some that destroys protector of odd electric current protects a function! Graph the electric current of 6 communication the rest that contain dc heft protect characteristic change to be aimed at the protector of odd electric current with complex part of odd electric current, need uses protector of Type B odd electric current, corresponding IEC standard is IEC62423:2009 " Type F And Type B Residual Current Operated Circuit-breakers With And Without Integral Overcurrent Protection For Household And Similar Uses " , corresponding country level is GB22794:2008 graphs 7 each sort odd electric current " breaker of movement of the do not take and has brought voltaic protection B of family expenses and similar utility odd electric current " Normal >B odd electric current can is opposite not only electric current of electric current of communication the rest, pulsatile dc the rest undertakes protective, in addition, still can reach the following sine to communicate overlay of electric current of the rest of odd electric current, communication to 1000Hz the pulsatile direct current that flowing and odd electric current, two-phase or polyphase commutate circuit generate overlay of electric current of electric current of flowing dc the rest, pulsatile dc the rest is odd electric current, flowing, can apply first-rately in handing in dc to mix small electrified wire netting. Normal >Magtron is based on the plan of SoC chip whole of IFluxgate technology, for B leakage of electricity protection undertook digitlization compositive, for RCCB the AC from the tradition / A to B model the technology upgrades, offerred solution of the B that price of a tall sex compares leakage of electricity, to charge the safety using phone of equipment provided better safeguard. Normal >normal Align=center> [bibliographical reference] Normal >[1] GB 22794-2008 and similar utility odd electric current (B RCCB and B RCBO) Normal >[2] .

Integrated protection and product standard analyse system of low-pressure dc distribution.

The building is electric.

Normal >[3]ABB.

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