Currently, distributed generation (DG)
concept is very hot, PV as distributed generation is the most important forms
of electricity generation is of concern, including the the PV inverters
distributed photovoltaic power generation equipment, their product quality is
good or bad a direct impact on the overall power generation efficiency of
photovoltaic
power
inverter
plants and power generation. Solid Dulwich as a research and
development focused on solar PV inverter, production and sales of new energy
high-tech enterprise, is now R & D and production of single-phase single
SS, DS single-phase dual DT three-phase dual, DI high-frequency isolation, PB
bidirectional energy storage, MT concentrated photovoltaic inverter products of
six series, power coverage from 1.5kW to 500kW. The full range of
PV
inverter
maximum conversion efficiency of 98.8% MPP tracking efficiency of over 99.5%,
and the total current harmonic distortion (THDi) control less than 1%, and has
reached the world-class level.
The mainstream now widely used in
distributed generation PV inverter is divided into the following two:
Group string inverters: generally refers to
the output power of 1kW ~ 20kW power inverter
Solid Dulwich SS Series 1.5 to 4.6kW DS
Series 3.6 ~ 4.6kW, DT Series 6 ~ 17kW
Centralized inverter: generally refers to
the power output greater than 100kW power inverter
The the solid Dulwich MT Series GW100k-MT,
GW250k-MT, GW500k-MTL.
Directly reflects the point of view of our
system design considerations in the design of a photovoltaic system, choose
what kind of inverter (string & concentrated):
Group of string inverters: protection class
(solid of Dewei string type inverter protection class IP65), suitable for
outdoor installation to save space, and more used in commercial roof, and the
pursuit of high power generation efficiency, high return on investment in
small-scale photovoltaic power plant project. The main feature is a single
inverter light weight, easy installation, low maintenance costs.
Centralized inverter: (protection class
IP20) indoor installation, distribution generally need to set up a special room
or outdoor room, multi applies to the construction of large-scale terrestrial
photovoltaic power plants, has been widely used due to low initial investment
costs.
Solid Dulwich through the actual
application environment, the design of the two 1MW distributed photovoltaic
power plants, the program were used to string type & centralized inverter
system design as the core, to share with customers the actual cost and
operating results:
Group string inverters program with a
centralized inverter solutions, the overall cost of flat, but the group string
inverters programs annually multiple 10% of electricity (string type 100 to 105
million degrees; concentrated 90 to 95 million degrees), for the owners of a
greater return on investment, and the payback period is shorter (string type 8
years; intensive nine years).
Analysis down set of string inverters in
distributed generation system design mainly look at the advantages:
1, multiple MPPT tracking component power
utilization is increased;
2, clouds obscured phalanx topical, greatly
reduces the impact of the power generation efficiency of the entire system;
3, easy installation
4, low maintenance and repair costs
5, a single fault generating capacity to Japan
6, system design Introduction
7 more security
Conclusion: The group of string
grid
tie inverter
W
accounting prices the concentrated type to be higher than some of the flat, but
the entire system of cost accounting. The string-type program in the protection
of the revenue, easy installation, low maintenance costs, high security
advantages are very prominent. Especially worth mentioning is that the single
failure on the daily generating capacity is extremely clear contrast. Selection
of string inverters for the MW level distributed power plant construction,
promotion distributed and the pursuit of higher investment income, which is a
big trend!
没有评论:
发表评论