A new energy power plant grid-connected power generation system
A power plant and new energy technology, applied in the field of new energy power generation, can solve problems such as wind power generation development constraints, high battery energy storage costs, and grid-connected power generation difficulties
Active Publication Date: 2018-01-19
芜湖市大文节能环保技术有限公司
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Problems solved by technology
[0002] At present, there are many defects in the use of wind power generation, which makes it difficult to connect to the grid for power generation. The main reason is that wind power generation is very unstable, and it is difficult to connect to the grid for power generation. However, the cost of storing energy in batteries is high and management is difficult, which greatly hinders the development of wind power generation. restrict
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[0013] Such as figure 1 As shown, the new energy power plant grid-connected power generation system is mainly composed of two parallel power supply lines, one is a renewable energy power supply line, and the renewable energy used in this embodiment is a wind power plant power supply line, which includes power generation facilities 1 (Wind energy farm rectifier), thyristor rectifier 2, inverter 3; Another power supply line is an auxiliary energy supply line, which includes auxiliary energy 4, capacitors C4-C6, transformer T2, fixed rectifier 6 and The diodes D9-D14 rectify and input the inverter 3 .
[0014] The above-mentioned auxiliary energy flow 4 is an AC power supply, which is mainly provided by the national grid, and auxiliary energy 4 can also be provided by batteries in isolated grid power generation areas. (To supply energy to the first group of renewable energy power generation devices, the subsequent power generation devices can provide auxiliary energy from the is...
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The present invention discloses a grid-connected power generation system for new energy power plants. The auxiliary energy output end is connected to the primary winding of a transformer T1 through a first supercapacitor, and the auxiliary energy output end is connected to the primary winding of a transformer T2 through a second supercapacitor. The transformer The secondary winding of T2 is connected to the inverter through a fixed rectifier, the inverter is connected to the power generation facility, the secondary winding of the transformer T1 is connected to the power generation facility through a silicon controlled rectifier, and the output of the inverter is incorporated into the power grid can. The invention has the advantages of being able to effectively eliminate discontinuity, instability, and "abandoned wind" of the wind power plant, and meet the requirements of peak shaving and valley filling in a timely manner. When the voltage of the wind power plant drops, it can be directly powered by the auxiliary energy supply line , directly help the wind farm to provide the corresponding differential voltage, so that the wind farm can generate as much electricity as possible, and ensure the clamping current of the continuous power generation of the wind farm, so that the wind farm can obtain continuous and stable energy supply.
Description
technical field [0001] The invention relates to the field of new energy (solar energy, wind energy) power generation. Background technique [0002] At present, there are many defects in the use of wind power generation, which makes it difficult to connect to the grid for power generation. The main reason is that wind power generation is very unstable, and it is difficult to connect to the grid for power generation. However, the cost of storing energy in batteries is high and management is difficult, which greatly hinders the development of wind power generation. restrict. Contents of the invention [0003] The technical problem to be solved by the present invention is to realize a controllable wind energy (solar) power plant grid-connected power generation system, which is conducive to fully and effectively utilizing wind energy power generation and reactive power energy of the grid to realize continuous and stable power generation of renewable energy and Grid-connected p...
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IPC IPC(8): H02J3/38
Inventor 王大文孙祯王梦琦王日晟
Owner 芜湖市大文节能环保技术有限公司