do you have HVDC TWO MARKS WITH ANSWER AND NOTES

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Source voltage converter (VSC), based on HVDC transmission system available in the market for rated power from a few to several hundred MBA MBA. The new system has a lot of potential applications and new applications, in turn, will bring new concerns. This article is focused on the study of HVDC transmission system and also represents a complex study of one of the concerned issues which contribute to HVDC Light? for short circuit currents. Different conditions of AC power, overload and fault types are treated under different conditions of operation and management regimes. The simulated results with full functions, as in real systems are presented and discussed. It also involves monitoring and protection strategy. Finally, a comparison between HVDC Light? and the conventional HVDC, SVC and STATCOM for exposure of short circuit current: comprehensive study on contribution of HVDC Light? the short circuit current was performed. The study led to the following conclusions.HVDC Light?, unlike the conventional HVDC that does not contribute to any short-circuit current can lead to a short-circuit current can be the maximum short circuit current contribution is determined by the SCR is back in proportion to the SCR and it occurs when the transmission system operates at zero active power. Thus, this compares with STATCOM until the maximum short circuit current contribution is concerned about the amount of the contribution depends on the control regimes, control points and management strategies. Reactive power management mode, current input short circuit current will be limited due to current limitation order decreases the voltage. In the mode of control of AC voltage, current contribution to short circuit will be increased with decreasing of active power, if the limit of current order has not changed. If the limiting current decreases the voltage current input short circuit current is small, even if the load is low. contribution to the short-circuit current is not related to the place of damage, if the current circuit is measured per unit with a value equal to the current circuit on 3-PH in the appropriate place and without HVDC Light? are connected. Under the same load and working condition, short-circuit current 1-s, usually less than 3 short circuit current-Tel. Finally, it should be noted that, due to the higher short circuit current of voltage stability and performance is likely to be improved. If A HVDC Light? promotes higher short circuit current, the voltage drop due to long short circuit may be reduced, and thus connected electricity consumers can suffer from violations of

(24-11-2014, 05:08 PM)Guest Wrote: do you have HVDC TWO MARKS WITH ANSWER AND NOTES