Control system for direct-current transmission serial-parallel converter
A technology for control systems and converters, applied in the direction of output power conversion devices, electrical components, etc., can solve the problem of multi-signal measurement and control is not easy and so on
Inactive Publication Date: 2016-01-06
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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Problems solved by technology
It is not an easy task to perform multi-signal measurement and control in such a system
Method used
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[0039] see figure 1 In order to better understand the technical solution of the present invention, the inventors of the present invention will describe in detail below through specific embodiments in conjunction with the accompanying drawings:
[0040] The main functions of the control system for the direct current transmission serial-parallel converter of the present invention are to measure the voltage signal and the current signal of the power circuit and send out the phase shifting pulse width modulation signal to the IGBT switch tube.
[0041] A control system for a direct current transmission series-parallel converter of the present invention is mainly divided into the following four parts: an analog signal preprocessing module 1 , a micro control unit 2 , a driving module 3 and an auxiliary power supply 4 . structured as figure 1 Shown:
[0042] The voltage signal or current signal measured by the sensor, that is, the input signal cannot be directly converted from ana...
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The invention discloses a control system for a direct-current transmission serial-parallel converter in the field of power transmission and distribution. The control system includes: an analog signal preprocessing module used for eliminating high frequency burrs in an input signal and modulating the level of the input signal to 0 to 3.3V; a micro-control unit which includes a DSP chip and a complex programmable logic device which are connected with each other, a first analog-to-digital conversion module being arranged on the DSP chip and connected with the analog signal preprocessing module, and a second analog-to-digital conversion module being arranged on the complex programmable logic device and connected with the analog signal preprocessing module, the complex programmable logic device achieves an isolation function between an external device and the DSP chip and after performing logic operation on a signal input to the complex programmable logic device, sending to the DSP chip; and a driving module which receives a control signal from the micro-control signal, sends a phase shift pulse width modulation signal capable of driving an IGBT switching tube, and isolates an auxiliary power supply from the micro-control unit.
Description
technical field [0001] The invention relates to a control system for a direct current transmission series-parallel converter. Background technique [0002] When disasters such as floods and earthquakes occur, the affected area will be interrupted, and disaster relief and rescue and resettlement of victims are inseparable from electricity. How to restore power supply to the disaster-stricken area in the first time and win time for disaster relief work is a very important topic. On the other hand, in densely populated urban centers, once the power is interrupted due to line failure or improper building construction, it will bring huge losses to the enterprise and cause inconvenience to the lives of the people. In order to reduce the loss as much as possible, the power supply should be restored in the shortest possible time. [0003] High-voltage direct current transmission technology can solve the problems of large transmission line loss and heavy cable weight. Currently, t...
Claims
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Inventor 梅彦金琪张弛张杰杨振睿李佳文王斌何正宇叶志刚石英超仲隽伟
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO