摘要:
PURPOSE: A sunlight power generation apparatus is provided to simplify a DQ conversion algorithm, thereby easily detecting a phase of a power system. CONSTITUTION: An inverter part(125) applies DC power generated using sunlight to a power system by converting the DC power into AC power. A measurement part(135) measures first voltage which is the voltage of the power system with respect to one phase among the converted AC power. A phase detection part(200) converts the first voltage and second voltage into d-axis voltage and q-axis voltage by a DQ conversion process. The phase detection part detects a phase of the power system using the d-axis voltage and q-axis voltage. A control signal generating part(180) generates a control signal in order to connect the inverter part to the power system.
摘要:
PURPOSE: A capacitance estimation system of a dc link capacitor for single phase pulse width modulation(PWM) converter is provided to improve productivity by determining the replacement time of a capacitor in advance by estimating a capacitance state in on-line. CONSTITUTION: An inductor(L) is connected to the backend of an input power source(es). A PWM converter converts AC voltage outputted from the input power source into DC voltage. The capacitor(C) is connected to the backend of the PWM converter and smooths the DC voltage. A voltage controller produces a second current command using the difference of the voltage of capacitor and a first voltage command. The current controller outputs the voltage command from the error current value.
摘要:
PURPOSE: A solar light system connected three-phases inverter circuit is provided to form the closed loop of an inverter switch and an LC filter by connecting the negative terminal or the positive terminal of a direct current(DC)-link capacitor to three filter capacitors. CONSTITUTION: A DC-link capacitor(Cd), inverter switches, and LC filters of a solar light system connected three-phases inverter form a closed-loop circuit. A capacitor(C) functioning as power source applies a noise voltage to an inductor(L). The noise voltage is generated by PWM switching. The capacitor reduces PWM switching noises by blocking the noise voltage. The negative terminal(N) of the DC-link capacitor is in connection with three filter capacitors. The positive terminal(P) of the DC-link capacitor is in connection with three filter capacitors.
摘要:
PURPOSE: Three phase current type half-bridge DC-DC converter for the power conversion device controls in order to each switch the zero-voltage switching. The power loss in switching is prevented. CONSTITUTION: The input unit is composed of three phase inductor(La, Lb, Lc) storing the input current. The third main switch(Qa, Qb, Qc) is connected to each output terminal of three phase inductor to score the first. The third main switch controls the current of three phase inductor to score the first. The activeness clamping portion(1) complementarily acts with the third main switch to score the first.
摘要:
PURPOSE: A solar cell apparatus for turning over for the transmission line monitoring diagnostic unit is made possible the efficient power generation at the solar cell by rotating the transmission line monitoring diagnostic unit according to the location of the sun. CONSTITUTION: A sphere frame installs to the transmission line. The body of the transmission line monitoring diagnostic unit(100) is constituted. It is separated frame and predetermined of sphere and the drive material(120) is arranged outside the sphere frame. The drive material can revolve the transmission line at shaft. It is installed in the solar cell(150) silver cover. It calculates the location of the sun and the controller controls the operation of the drive material.
摘要:
PURPOSE: A converter for a photovoltaic power facility is provided to determine an operation of a level converter by comparing the DC voltage input with a preset middle circuit voltage. CONSTITUTION: A converter(1) includes a solar cell device(10), a level converter(2), and at least one inverter(60). The level converter has a DC voltage input. A positive input terminal of a DC voltage input is connected to an anode of a first diode and a first switch. A negative input terminal of the DC voltage input is connected to a cathode of the second switch and the second diode. The cathode of the first diode is connected to the first capacitor. The anode of the second diode is connected to the second capacitor. The first and second switches are connected to the first and second capacitors.
摘要:
PURPOSE: A solar cell module is provided to improve the photoelectric efficiency of a solar cell by forming the intrinsic silicon layer with amorphous silicon layers and fine crystalline silicon layers. CONSTITUTION: In a device, a solar cell(200) changes optical energy to electrical energy. A bias supply unit(110) supplies a reverse bias to the solar cell. An energy output unit(120) outputs the electrical energy generated from the solar cell. A switching unit(130) connects the solar cell and the bias supply unit. The switching unit connects the solar cell and energy output unit. A switching controller(140) controls operations of the switching unit. The switching unit includes the first semiconductor switch and the second semiconductor switch. The first semiconductor switch is formed between the solar cell and the bias supply unit. The second semiconductor switch is formed between the solar cell and the energy output unit.
摘要:
본 발명은 태양광 발전용 풀브릿지 DC/DC 컨버터의 효율개선방법에 관한 것으로서, 특히 소정의 권선비로 감겨진 1차코일과 2차코일로 이루어진 고주파 트랜스포머와, 상기 1차코일에 연결되도록 제 1 내지 제 4 파워스위치로 이루어진 풀브릿지 회로부와, 상기 2차코일에 연결되도록 브릿지 다이오드 정류기가 연결되어 있는 것에 있어서, 상기 고주파 트랜스포머의 권선비를 태양전지 모듈이 최대 전력을 발전하는 전압에서 유효 듀티가 일정치 이상이 되도록 설정하므로서, 고주파 트랜스포머의 권선비 최적화를 꾀하여 프리휠링 구간을 줄여주고 이를통해 파워링되어지는 유효구간을 증대시켜 최대의 발전량을 얻을 수 있도록 한 태양광 발전용 풀브릿지 DC/DC 컨버터의 효율개선방법에 관한 것이다. 풀브릿지 DC/DC 컨버터, 고주파 트랜스포머, 1차코일, 2차코일, 권선비, 파워링효율증대, 프리휠링 감소,
摘要:
발전 장치의 종류에 관계없이, 저충전 손실로, 저누설 전류의 전력 공급 제어 회로를 제공하고, 더 나아가서는, 발전 장치 혹은 축전 장치를 갖는 전자 기기에 있어서의 충전 효율의 향상, 구동 가능 시간의 장시간화를 도모한다. 전력 공급 장치(11)와, 전력 공급 장치(11)에 의해 축전 되는 축전 장치(12)의 사이에 삽입된 전력 공급 제어 회로(10)는, 전력 공급 장치(11)로부터 축전 장치(12)에 흐르는 충전 전류(IC)를 검출하는 충전 전류 검출부(13)와, 입력된 역류 방지 제어 신호(SH)에 기초하여, 축전 장치로부터 상기 발전 장치에 흐르는 역류 전류(IR)를 차단하는 역류 방지부(15)와, 충전 전류(IC)가 검출될 때까지는, 샘플링적으로 충전 전류(IC)의 유무를 감시하고, 충전 전류(IC)가 검출된 후에는, 항상 충전 전류(IC)의 유무를 감시하며, 충전 전류(IC)가 흐르고 있지 않은 경우에, 역류 전류(IR)를 차단하기 위한 역류 방지 제어 신호(SH)를 출력하는 역류 감시부(14)를 구비한다.