Difference between revisions of "Control Equipment - Hydropower"
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| − | ==== <span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;">Flow | + | ==== <span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;">Flow control:</span> ==== |
<span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;">regulates the amount of water into the | <span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;">regulates the amount of water into the | ||
| − | turbine in order to match power output and power demand.</span> | + | turbine in order to match power output and power demand.[[Image:Flow-control.jpg|left|650x264px|principle flow control]]</span> |
<span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;"><!--[if gte vml 1]><v:shape id="_x0000_i1025" | <span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;"><!--[if gte vml 1]><v:shape id="_x0000_i1025" | ||
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| − | + | <v:imagedata src="file://localhost/Users/timchiaradia/Library/Caches/TemporaryItems/msoclip1/01/clip_image003.jpg" | |
| − | + | o:title="flow-controll"/> | |
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| − | </span> | + | </span> |
==== <span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;">Ballast load:</span> ==== | ==== <span lang="DE" style="font-size: 11pt; font-family: Tahoma; color: black;">Ballast load:</span> ==== | ||
Revision as of 15:34, 27 May 2010
Overview:
Function:
Load- or Flow- controller ensure that the power output does not exceed the power demand (e.g. 230V, 50 Hz).
If flow of water in a MHP-station is constant
the energy output of a turbine/generator is constant as well. Power
demand is
usually fluctuating over the time (e.g. day/night). If supply is higher than demand, excess energy must be diverted, dumped. altrenatively the
water flow can be reduced which results in less power output.
In case of more power demand than supply the controler cuts of
the of demand line.
Load controller are placed between generator output and the consumer line.
Controll Elements
Load controller
Electronic circuit, which keeps output power constant in Frequency- and Voltage- parameters.
Fluctuating energy demand requires a mechanism which either regulates the water input into the turbine (=> flow control) or by diverting excess energy from the consumer connection (=>ballast load).
Flow control:
regulates the amount of water into the
turbine in order to match power output and power demand.
Ballast load:
If energy demand is temporarily low, the controller sends excess energy to the Ballst Load. This are usually electrical heaters in water or air.
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