A regenerative energy power conversion device for converting discontinuous high voltage direct current into alternating current as a power source is provided. The regenerative energy power conversion device comprises: a line voltage detection unit which detects the line voltage (V_In(t)) and the generation of high voltage by regenerative energy; a voltage regulation converter that includes a plurality of converter modules connected in series to divide the line voltage (V_In(t)) and a plurality of module voltage detectors each connected in parallel with the plurality of converter modules; a DC-AC inverter which converts the direct current power output from a voltage regulation converter into alternating current and delivers it to the grid; and a controller which receives the line voltage (V_In(t)) from the line voltage detection unit to control the operations of the voltage regulation converter and the DC-AC inverter, receives the line voltage (V_In(t)) from the plurality of module voltage detectors, compares the value of the line voltage (V_In(t)) equally divided by the number of modules (n) (V_i(t)/n) with each of the direct voltages (V_i(t)) of the plurality of converter modules, and detects voltage imbalance among the plurality of converter modules.
불연속적인 고전압 직류를 전원으로 하여 교류로 변환하기 위한 회생에너지 전력변환장치가 제공된다. 회생에너지 전력변환장치는 가선전압(VIn(t))을 감지하고, 회생에너지 발생에 의한 고전압의 발생을 감지하는 가선전압 검출부와, 가선전압(VIn(t))을 분할하기 위해 직렬로 연결되는 복수의 컨버터모듈 및 복수의 컨버터모듈과 각각 병렬로 연결되는 복수의 모듈전압 검출부를 포함하는 전압조정 컨버터와, 전압조정 컨버터에서 출력된 직류 전력을 교류로 변환하여 계통에 전달하는 직류-교류 인버터와, 가선전압 검출부의 가선전압(VIn(t))을 수신받아 전압조정 컨버터와 직류-교류 인버터의 동작을 제어하고, 복수의 모듈전압 검출부의 가선전압(VIn(t))을 수신받아 가선전압(VIn(t))을 모듈 개수(n)로 동등하게 나눈 값(VIn(t)/n)과 복수의 컨버터모듈의 각각의 직류전압(Vi(t))을 비교하여 복수의 컨버터모듈 사이의 전압 불균형을 감지하는 제어기를 포함한다.
Power converter for regeneration energy
회생에너지 전력변환장치
2023-05-19
Patent
Electronic Resource
Korean
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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