Grid fault ride-through control method for flexible direct-current transmission system
A power grid fault and power transmission system technology, applied in the field of flexible power transmission and transformation, can solve problems such as the failure of the system to operate normally in the flexible direct transmission system, increase the complexity of the system, and the system's DC voltage out of control, and achieve simple fault ride-through and simple control structure , the effect of improving stability
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[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0029] In this embodiment, the target system is a double-terminal flexible DC power transmission system. The constant DC voltage side converter station of the system is connected to the AC grid, and operates in a combined mode of DC bus voltage control and reactive power control (i.e., U dc / Q mode, U dc Indicates the DC bus voltage of this terminal, Q indicates the reactive power of this terminal), for the convenience of the following, it is defined as U dc / Q terminal; the constant power converter station of the system is connected to another AC power grid, and operates in the combined mode of active power control and reactive power control (that is, P / Q mode, P indicates the active power of this terminal, and Q indicates the active power of this terminal Reactive power), defined as the P / Q end, both ends are connected through the DC bus, ...
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