High-redundancy synchronization method for intelligent rectifier bridge based on FPGA and communication network
A high-redundancy, communication network technology, applied in the field of high-redundancy synchronization of intelligent rectifier bridges, can solve problems such as the disappearance of synchronous signals of intelligent rectifier bridges, and achieve the effect of improving stability and ensuring stable operation
Active Publication Date: 2019-06-28
CHINA YANGTZE POWER +2
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However, if the synchronous signal of the rectifier bridge has a secondary fault, and 2 or 3 phases are disconnected, all synchronous signals connected to the smart rectifier bridge will disappear, and the smart rectifier bridge will only be out of operation.
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[0041] Such as Figure 1-3 As shown, the high-redundancy synchronization method of intelligent rectifier bridges based on FPGA and communication network is suitable for intelligent rectifier bridges with multiple outputs connected in parallel. The intelligent rectifier bridges include three-phase rectifier bridges, configuration With the controller of FPGA and CPU, the high-redundancy synchronization method of intelligent rectifier bridge based on FPGA and communication network specifically includes the following steps,
[0042] Step 1: The smart rectifier bridge judges the status of the locally connected three-phase synchronous signal, and shares the status information of the synchronous signal with all smart rectifier bridges through the communication network;
[0043] Step 2: The smart rectifier bridge selects a synchronous signal from all phase synchronous signals of the smart rectifier bridge as the synchronous working phase according to the synchronous working phase sele...
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The invention discloses a high-redundancy synchronization method for an intelligent rectifier bridge based on an FPGA and a communication network. The method is suitable for a plurality of intelligentrectifier bridges with parallel outputs. The intelligent rectifier bridge comprises a three-phase rectifier bridge and a controller provided with an FPGA and a CPU. The method comprises the steps that the intelligent rectifier bridge judges the states of a locally accessed three-phase synchronous signal and shares the state of the synchronous signal to all other intelligent rectifier bridges; theintelligent rectifier bridge selects one synchronous signal from the synchronous signals of all the intelligent rectifier bridges as a synchronous working phase according to a synchronous working phase selection rule; and the intelligent rectifier bridge judges whether the three-phase synchronous signal locally accessed to the intelligent rectifier bridge corresponding to the working phase signalhas a synchronous fault in real time or not and reselects the synchronous working phase. According to the invention, the redundancy of synchronous signals is improved, so that the fault tolerance andavailability of the rectifier bridge are improved, and the continuous and stable operation of a power system is ensured; the intelligent rectifier bridges adopt a common synchronous working phase selection rule to select the synchronous working phase, so that the stability of the system is improved.
Description
technical field [0001] The invention belongs to the field of power conversion, and in particular relates to a high-redundancy synchronization method for an intelligent rectifier bridge based on an FPGA and a communication network. Background technique [0002] High-power power electronic devices usually need to use multiple thyristor three-phase rectifier bridges to output in parallel, as shown in the attached Figure 4 As shown, the controller outputs the trigger angle to the rectifier bridge through the communication network, and the rectifier bridge controller generates a control pulse to trigger the rectifier bridge according to the synchronization signal and the trigger angle, and converts the three-phase AC on the anode side to DC. as attached Figure 5 As shown, the synchronous signal used by the smart rectifier bridge is to convert the sine wave of the anode voltage input by the rectifier bridge into a signal square wave after being step-down and shaped by the synchr...
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IPC IPC(8): H02M7/219
Inventor 王瑞清余翔张敬王宇庭王波罗红俊罗维
Owner CHINA YANGTZE POWER