Signal transmission, analysis method and device, signal transmission circuit and converter system
A converter and signal technology, applied in the direction of output power conversion devices, electrical components, single-network parallel feeding arrangements, etc., can solve the problems of occupation, multiple hardware resources, etc.
Active Publication Date: 2018-12-25
维谛新能源有限公司
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Problems solved by technology
However, when there are many fault ride-through modules in the converter, their status signals need to be transmitted to the controller through many signal lines, which will occupy a lot of hardware resources
[0006] To sum up, when there are multiple fault ride-through modules in the converter, the status signal of each fault ride-through module must be transmitted to the controller of the converter through a signal line, which will occupy a lot of hardware resources
Method used
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Embodiment Construction
[0045] Embodiments of the present invention provide a state signal transmission method and device for a fault ride-through module in a converter, a method and device for analyzing signals by a controller of a converter, and a state signal transmission circuit for a fault ride-through module in a converter and the converter system, by transmitting the state signals of at least two fault ride-through modules to the controller of the converter through a signal line in sequence according to the set order, the controller signal transmitted to the converter is a mixed state signal, Since the state signals of these fault ride-through modules when they are turned on are periodic pulse signals with different pulse widths, the state signals of these fault ride-through modules when they are turned off are different from the pulse state signals of the aforementioned fault ride-through modules when they are turned on At the same time, the single transmission duration of the status signal of...
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Embodiments of the invention provide a signal transmission method, a signal transmission device, a signal analysis method, a signal analysis device, a signal transmission circuit, and a converter system in order to solve the problem that a lot of hardware resources are occupied when a converter has a plurality of fault ride-through modules due to the fact that the state signal of each fault ride-through module is transmitted to a controller of the converter through one signal line. The signal transmission method comprises the following steps: state signals of at least two fault ride-through modules in a converter are sequentially received according to a set sequence, wherein the state signals of the at least two fault ride-through modules in a switched-on state are periodic pulse signals of which the pulse widths are different from each other, the length of time for single reception of the state signal of each ride-through module is not less than N cycles of the state signal when the state signal is a periodic pulse signal, and N is a positive integer greater than 2; and the received state signals are sequentially transmitted to a controller of the converter according to the receiving sequence, and the sequentially transmitted state signals form a mixed state signal.
Description
technical field [0001] The present invention relates to the field of power electronics technology, in particular to a method and device for transmitting state signals of a fault ride-through module in a converter, a method and device for analyzing signals by a controller of a converter, and a fault ride-through module in a converter. State signal transmission circuit and converter system. Background technique [0002] The converter in the wind power generation system (wind power system) is mainly responsible for converting the electric energy generated by the wind turbine into alternating current with controllable power, current and frequency. In the wind power system, due to the fluctuation of the grid or the short-term failure of the grid, the grid voltage drops, and the voltage drop will cause the wind turbine to transfer from the normal working condition to the low-voltage ride-through working condition. If the low voltage ride through is not properly handled, it will c...
Claims
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IPC IPC(8): H02M1/00H02J3/38
CPCH02J3/38H02M1/00
Inventor 周毓龙胡煜李卿
Owner 维谛新能源有限公司