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A device three-phase current feedback unit applied in reactive power compensation control system
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A technology for compensating control and feedback units, applied in the field of electronics, can solve problems such as poor stability and real-time performance, and achieve the effects of solving poor stability and real-time performance, improving computing efficiency, and ensuring real-time performance and stability.
Inactive Publication Date: 2016-01-13
哈尔滨同为电气股份有限公司
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[0003] The present invention is to solve the problem of poor stability and real-time performance in the reactive power compensation control system. The present invention provides a three-phase current feedback unit for equipment used in the reactive power compensation control system
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specific Embodiment approach 1
[0013] Specific implementation mode one: see figure 1 Describe this embodiment mode, a kind of equipment three-phase current feedback unit in the reactive power compensation control system described in this embodiment mode is characterized in that, it is realized based on FPGA, and described FPGA includes PARK conversion module 1, PLL module 2, anti-PARK transformation module 3 and sampling and preprocessing module 4,
[0014] The sampling and preprocessing module 4 is used to collect the three-phase network side voltage, the three-phase network side current and the actual three-phase equipment current, and send the collected three-phase network side voltage to the PLL module 2, the three-phase network side current and the actual three-phase equipment current are sent to PARK conversion module 1,
[0015] The PLL module 2 is used to generate the phase-locked angle θ according to the three-phase grid side voltage, and send the phase-locked angle θ to the PARK transformation mo...
specific Embodiment approach 2
[0020] Specific embodiment 2: The difference between this embodiment and the three-phase current feedback unit of the equipment applied in the reactive power compensation control system described in the specific embodiment 1 is that the PARK conversion module 1 is based on the three-phase grid side current Generate the component D of the grid-side current on the d-axis S and the component Q of the grid side current on the q axis S , achieved by the following formula:
[0021] formula one;
[0022] Among them, i sa i sb and i sc are the A-phase, B-phase and C-phase currents of the three-phase network side currents, respectively.
specific Embodiment approach 3
[0023] Embodiment 3: The difference between this embodiment and the equipment three-phase current feedback unit applied in the reactive power compensation control system described in Embodiment 1 is that the PARK conversion module 1 is based on the actual three-phase equipment current Generate the component D of the device current on the d-axis C and the component of the device current on the q-axis Q C , achieved by the following formula:
[0024] formula two;
[0025] Among them, i ca i cb and i cc They are the A-phase, B-phase and C-phase currents of the actual three-phase equipment current.
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Abstract
The invention belongs to a three-phase equipment current feedback unit applied to a reactive compensation control system and belongs to the technical field of electronics. The three-phase equipment current feedback unit solves the problems of poor stability and real-time performance existing in the reactive compensation control system. The three-phase equipment current feedback unit is realized based on an FPGA. A sampling and preprocessing module transmits collected three-phase network-side voltages to a PLL module and transmits collected three-phase network-side currents and actual three-phase equipment currents to a PARK conversion module. The PLL module is used for forming an angle 8 subjected to phase locking according to the three-phase network-side voltages, and transmitting the angle 8 subjected to phase locking to the PARK conversion module and a reverse PARK conversion module. The PARK conversion module is used for generating a component DS of the network-side currents on a d axis and a component QS of the network-side currents on a q axis according to the three-phase network-side currents. The reverse PARK conversion module is used for receiving a given component DC0 of the equipment currents on the d axis and a given component QC0 of the equipment currents on the q axis, and obtaining an instantaneous given value of the three-phase equipment currents according to the angle 8 subjected to phase locking, wherein the given component DC0 and the given component QC0 are transmitted from an address bus. The three-phase equipment current feedback unit is applied to the reactive compensation control system.
Description
technical field [0001] The invention belongs to the field of electronic technology. Background technique [0002] At present, due to the rapid development of electronic technology, especially the main control CPU. The reactive power compensation controller is gradually over-simplified to complicated. Constantly use faster and higher-end CPUs in the main control design. There is even a solution of using multiple CPUs to realize its functions. However, this method, first, brings about a substantial increase in cost; second, when using a multi-core CPU solution, the complex inter-CPU arbitration and communication bring hidden dangers to the stability of the system, and due to the sequential execution characteristics of the CPU , so that the slave CPU has a certain delay in both the response to the instruction and the completion of the task, and its real-time performance cannot be guaranteed. Contents of the invention [0003] The invention aims to solve the problem of poo...
Claims
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