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A NEW METHOD OF CONTROLLING A Q-PULSE THYRISTOR CONVERTER USING A SINGLE SYNCHRONIZATION VOLTAGE
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| Author(s) |
Stanislaw Kapka |
| Abstract |
The article proposes an incremental measurement loop with a phase locked loop used to generate a precise linear phase scale with an M. number of markers distributed equally in a supportive synchronization voltage period. A new incremental frequency method of CJ.angle shaping has been proposed. It uses the moment of passing through zero of a specified
single synchronization voltage to synchronize the moments of q-thyristors turn-on. It has been shown that it is possible to realize the digital algorithm of individual controlling a q-pulse
thyristor power module with the possibility of shaping CJ.-angle in the real time. basing on two simple statements: + 1 Increment and -1 Decrement repeated with appropriate frequencies. It has also been shown that a possible maximum negative angle increase -L'1CJ.=30°. and the
maximum positive angle increase can equal CJ.max. The dCJ./dt speed of changes depends on the f_x frequency value and it can be shaped freely. depending on the previously defined
target function. The proposed method uses active global limitations of the alpha-min. alpha-max type as well as current and voltage limitations. It is characterized by easy cooperation with the uP. system. the PID controller. It has the dynamic properties of an equivalent phase control method in the analog version. |
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| Filesize: | 480.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2016-03-09 by System |
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