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Wind turbine Grid tied - pros consFirst, a domestic home "wind" grid tied is an extremely "green" concept...although a little heavy and awkward to set into place...
The type of social and talking point for a party...
If you erect a wind turbine you must locate it at least 80 meters away from any neighboring residence because wind turbines are noisy!!! , It's when they get near the rated wind speed(12 mps) though most people will have closed their windows because of wind.
A low RPM horizontal 2Kw wind turbine(or high production down low speed) has the same production as a 4Kw solar grid tied system, and twice the economic savings because all tariff periods are covered regardless seasonal differences!!! Remember a wind turbine must be located "at least 12 meters high" free of wind path obstructions, but "the proper height for higher faster moving air percentile is up at 15 meters"!!!
...If there is one thing as "must know" a DIY person should learn! It is Arc welding and MIG welding mild steel!...
Getting concrete is a problem of cost, 1 tonne (Metric) (tonne of concrete) Equals : 0.42 cubic meters (m3 / concrete).
In the "tower diagram"(showing only two struts of the three) at left or below(wherever it got to on the page), the pink strapping struts are an underground part of the tower and welded on the tower before erection.
To erect the tower after construction will mean some minor damage to the edges of the triangular hole, and keeping it in place using three temporary guy cable or chains (during and after cement pouring to encase its base) after adjustment of the guys for plumb bobbing the tower for vertical balance accuracy down its center.
To hold the tower in place you should have the area space to drive pin stakes in around it to fasten 10 - 15m tensioned replacement-boat-winch-cables(cheap trick) to hold the tower directly in gravity line while the cement dries in the base.
There are usually two types of turbine connection base on 5Kw wind turbines. 1. a piece of pipe socket requiring a 20cm - 40cm (200 mm - 400mm) long piece of vertical pipe (10mm wall minimum) properly attached to the top of the tower, or, 2. a flat faced circular seat directly centered under and part of the swivel seat of the main body of the turbine surrounding where the two high voltage/amperage output wires are to be fastened, this requires making a set of steel plates (at least 30 mm thickness) to fit above and below the top triangle bars of the tower top. This is to seat, clamp and adjust the horizontal plane of the turbine base where it is bolted to the pair of steel plates clamping the top triangle bars of the tower tip. Such a steel plate is best designed from the tower top bars and turbine bases' shape and size after both are actually available to measure. Also beware of where the wires leave the turbine swivel system and any custom objects must be cleanly finished to prevent abrasive damage to cable insulators, whether at installation or over time by vibration.
If there is one thing as "must know" a DIY person should learn! It is Arc welding and MIG welding mild steel!
This is beause a tripod tower of Eiffel type of 15M height(18 meters long - 3 meters below ground in fill cement) can be welded with 4mm box(square tube) or round tube steel from a local steel merchant for around 2000 AUD or less,
and to acquire the skill means TAFE or adult learning center out of hours course.
Here is an EXAMPLE of a MIG welder supplied on market in Australia can be used. Usually it requires a "8Kva" power petrol generator because the current draw during use is too much for a house electrical supply!!!!
Pros and Cons5Kw wind turbines grid tied(they are 24/7-365), why people grid tie solar except a little with a wind turbine hybrid system e.g. 1Kw solar i do not understand!
When i finally learned the limitation of solar panels i found winter sunlight and temperature in a moderate climate as Australia panels only produce for 4 hours at 50%-60% of max rating
e.g. and down to 30% when obscured by clouds. Then people get up and all leave before light in winter and get back after its dark.It leaves summer.
In summer its 80% power for 8 hours and down to 60% in white cloud and 50% grey.
5kw panels grid tie can produce the same old pre-tie grid bills as a shock and everyone thought that would leave!
Answer is nothing after dark when people are finally home, i'd say half the recipients of grid-tie in Australia are ripped off by that point of night time alone.
Another is they need at least a 5Kw max-rated PV system or its ritually too little, And a final 10%, their roofs have no good position in suburbia and almost all installations except these bad positions are lying flat not to equator for latitude!!!
If you have at least 5 acres on the edge of town(up to 3Km out of town) and can locate the turbine 80 meters from neighbours dwelling, a matching 5kw wind-grid-tie-inverter and 5k turbine (240v / 380v Australia)
(110v/120v US UK) at 4-6m/s wind will often trickle 500w to 1Kw.A minimal of 1-1.5Kw panels on hybrid grid tie inverter assists.NOTE!: For meteorological
reasons a wind turbine must be up "12 meters high MINIMUM"(much better 15m), nominally for cost 15 meters correctly!
A big feature of the problem of fitting a grid tie inverter is the national laws regarding specifications of devices imported(aound 50% of its market), one such being "islanding" "anti-islanding" and meter reading and correct wiring(grid tie and hot wire e.t.c. are complex and require an electrician!).
This article does not beat the "Achilles Heel of grid tied" anyhow, its not enough or costs too much in batteries.
Below are some links to some products by companies that specialise in these types of system.
Easy 2Kw wind grid tiedRemember, to use a grid tie inverter requires your meter to be changed(to a unidirectional or SMART meter) to allow produced energy to be measured also as it is outgoing as excess!
Any inverter if conected into a house circuit by electricians modifications is "between the meter and the fuse box fuses", i.e. if you wanted to use a 3Kw wind turbine you could get an electrician to simply wire in a short 1m of 15 amp wire and "15 amp socket(3.7Kw - 3700w)"(and by law a 15 amp fuse to the box) so you could unplug at will your 4Kw inverter if it were on a normal house-industrial 15 amp extension cord.
The easiest method of covering 24/7 365 costs of implementing a grid tied system is understanding a house normally has 10 amp circuits @ 240v.
10 amp @ 240v = 2.5Kw (2500w).
This means it is not a good idea to plug an inverter into a 10 amp extension socket board if it will get to 2500w , and disastrous if the wind turbine can reach beyond it!
Here is an example of a 2Kw rated wind turbine that can be plugged to house circuit because it is only 2300w maximum!
WARNING! the above turbine is a "48v". This means that at 5% loss on 30 meters of cable(x2 a red , a black is 60 meters) it will require 35mm2 copper electric cable to carry 3Kw. Translated, around 1000 AUD of cable.
Consider this is only at the rating speed and output very top amperage that loss occurs, and 90% of time of the operation of a wind turbine, the current can be carried by this cable size.
Another point about wind turbines is they are usually three phase AC generator inside but are listed as DC or out-puting DC current finally. This because there is a rectifier inside the housing(basically alike diode set). The type of rectifier is more of a selenium industrial type to handle high voltage and amperage.
The more common life of wind turbines
This establishes the point that on the end of a grid tie inverter cord is simply as good as household plug!
All in all, stackable - pluggable grid tie inverters only go to 2000w. And the annoyance is fitting inverter to turbine at price and acquirability. Than building a suitable tower.
NOTE: The above tower diagram for the 5Kw tower only require 50mm x 50mm x 4mm(wall) SHS for 2 and 3Kw wind turbines.
Of Kw hour production, a 2Kw wind turbine at 15m tower height should match the savings and production of a 4-5Kw solar. This would probably require 5000 AUD to implement D.I.Y.(DIY) - and y'oll sweat!!!
For this(not required except in strange cases), ask about stepping power into the input voltage and current bracket for an Australian approved solar inverter.
To understand "DIY, Do It Yourself" importation process with no middle man refer to the index page article of
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