Solar power generation system and feeding system
A power generation system and solar energy technology, applied in photovoltaic power generation, photovoltaic system monitoring, electrical components, etc., can solve problems such as difficulty in achieving system frequency stabilization
Active Publication Date: 2012-11-21
KK TOSHIBA
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On the other hand, in a power generation system that combines a solar power generation module and a power storage device, there is no such frequency adjustment function as described above by a synchronous generator when the system frequency fluctuates. When a large number of systems are introduced, it is difficult to stabilize the system frequency
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[0029] Hereinafter, the solar power generation system and the power supply system according to the first embodiment of the present invention will be described in detail with reference to the drawings. Such as figure 1 As shown, the solar power generation system according to this embodiment includes: a DC power supply including a solar cell 3 and a storage battery 4 for storing the electric power generated by the solar cell 3; 4 The output direct current is converted into alternating current, and connected to the power system 1 via a smoothing reactor (reactor) 18; the voltage detection unit 5 is installed near the connection point between the power conversion device 2 and the power system 1, and the voltage at the connection point is Detection; current detection part 6, which is arranged at the connection point of power conversion device 2 and power system 1, detects the current output from power conversion device 2; active power detection part 7, which is based on voltage det...
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The invention relates to a solar power generation system and a feeding system. The solar power generation system comprises: a DC power supply including a solar cell (3); a power conversion device (2) for converting DC power output from the DC power supply to AC power; a voltage detection unit (5) for detecting voltage output from the power conversion device (2) to a power system (1); a current detection unit (6) for detecting current output from the power conversion device (2) to the power system (1); an effective power detection unit (7) for detecting effective power from the output of the voltage detection unit (5) and the output of the current detection unit (6); a mass-point system calculation unit (10) for calculating the angular frequency (omega) of the voltage output from the power conversion device (2) on the basis of the output from the effective power detection unit (7) and an output target value (Pref) of the effective power; an electric characteristic calculation unit (21) for calculating an output voltage target value (Ec) of the power conversion device (2) on the basis of the angular frequency (omega), a detection current value (IG), and a setting voltage value (Vref); and a power conversion control unit (14) for controlling the power conversion device (2) according to the output voltage target value (Ec).
Description
technical field [0001] Embodiments of the present invention relate to a solar power generation system and a power supply system. Background technique [0002] Since solar power generation has long-term fluctuations or short-term fluctuations in power generation due to the amount of sunlight, it is difficult to achieve stable power supply compared with conventional power generation systems such as thermal power generation. In addition, because synchronous generators such as thermal power generation have the potential to suppress the frequency fluctuation when the system frequency fluctuates, and even have a speed governor, adjust the power generation to suppress the frequency fluctuation when the system frequency fluctuates, so it is helpful to stabilize the system frequency. On the other hand, in a power generation system that combines a solar power generation module and a power storage device, there is no such frequency adjustment function as described above by a synchrono...
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IPC IPC(8): H02J3/38
CPCH02J3/383H02J3/40H02J3/38H02J9/00Y02E10/58H02J3/48Y02E10/563H02M7/48Y02E10/566H02J3/28H02M7/42H02S50/00H02J2300/24H02J3/381H02J3/46Y02E10/56
Inventor 木村操野吕康宏林秀树小俣和也浅野俊明江幡良雄
Owner KK TOSHIBA