A control method for increasing the operating power limit of cascaded hybrid DC unipolar
A hybrid DC and operating power technology, applied in reactive power adjustment/elimination/compensation, power transmission AC network, flexible AC transmission system, etc., can solve the problem of increased reactive power consumption, increased LCC DC commutation failure, pull Problems such as low AC bus voltage
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] The present invention provides a control method for increasing the operating power limit of cascaded hybrid DC unipolar poles. First, the cascaded hybrid DC pole I is normally unlocked and started to a rated operating state, and the LCC converter station of pole II is in a shutdown state, and then Unlock the MMC converter station of Pole II and work in STATCOM (Static Synchronous Compensator, Static Synchronous Compensator) mode, and increase the reactive power through the MMC converter station of Pole II to meet the reactive power demand of LCC DC after the power of Pole I is increased. Specific steps are as follows:
[0023] Step 1: In a cascaded hybrid DC system with multi-point receivers, unlock the cascaded hybrid DC pole I under a given AC system operation mode; the specific method is: first unlock the low end of the rece...
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