Composite direct current power modulation method for out-of-limit control of alternating current section power
A DC power modulation and section power technology, applied in the field of modulation, can solve the problems of long operation period, difficulty in meeting the stability control of cross-regional power grid, and loss of stability of the system, and achieve the effect of improving transient and dynamic stability characteristics
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[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0036] The system oscillation that occurs in the inter-regional interconnection grid is usually reflected in the power fluctuation of the AC tie line between the large regions. The power of the AC tie line is used as the input of the DC power modulation function to control the transmission, which can directly reflect the system oscillation and effectively suppress the system oscillation. Therefore, the present invention uses the power of the AC tie line as the control input, while using the DC power modulation signal to suppress the power fluctuation of the tie line, and at the same time judge whether the power of the tie line reaches a certain limit value, thereby triggering the DC power emergency control function to maintain Transient and dynamic stability of interregional power grids.
[0037] Such as figure 1 , the present invention provides a kind of D...
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