30results about How to "Reduce rated capacity" patented technology

The invention discloses a plug-and-play active electric power filtering device and is applicable to a circuit comprising a system power source and a harmonic load. The plug-and-play active electric power filtering device comprises a mutual inductor, an inverter and a modulation signal generation module, wherein a winding at a primary of the mutual inductor is a power transmission wire penetrating between the system power source and the harmonic load of the internal portion of a core, the modulation signal generation module is used for generating a modulation signal of the inverter, the modulation signal is generated through superposing a primary fundamental current after reverse amplification and a primary harmonic current after positive amplification, and the inverter is used for converting a DC signal into an AC current signal same as the modulation signal in frequency and injecting the AC current signal to a secondary winding of the mutual inductor to make primary fundamental equivalent impedance of the mutual inductor be Z1+(1-alpha)Zm and make primary nth-order harmonic equivalent impedance of the mutual inductor be nZ1+(1+beta)nZm. The plug-and-play active electric power filtering device is advantaged in that the specially-produced mutual inductor is employed to make the active filtering device realize the plug-and-play function, the primary of the mutual inductor can be controlled for being in short circuit relative to a fundamental state and for being in an opening circuit relative to a harmonic state, and the filtering function is further realized.

The invention discloses a plug-and-play specified subharmonic active electric power filtering device. The device comprises a mutual inductor, an inverter and a modulation signal generation module, wherein a winding at a primary of the mutual inductor is a power transmission wire penetrating between the system power source and the harmonic load of the internal portion of a core, the winding has one loop, the core of the mutual inductor is a fine long cylindrical structure or is a fine long cuboid structure suitable for a busbar, the modulation signal generation module is used for generating a modulation signal of the inverter, the modulation signal is generated through superposing a primary fundamental current after reverse amplification and a primary specified subharmonic current after positive amplification, and the inverter is used for converting a DC signal into an AC current signal same as the modulation signal in frequency and injecting the AC current signal to a secondary winding of the mutual inductor to make primary fundamental equivalent impedance of the mutual inductor be Z1+(1-alpha)Zm and make primary nth-order specified subharmonic equivalent impedance of the mutual inductor be nZ1+(1+beta)nZm. The device is advantaged in that the plug-and-play function is realized through the mutual inductor, for specified subharmonic compensation, capacity and cost of the whole set device are reduced.

The invention relates to a storage battery energy storage conditioning device, which is characterized by comprising at least two charging and discharging management systems and a main system monitor, wherein the AC sides of the charging and discharging management systems are connected with a public bus-bar in parallel, and then are connected with a high voltage main bus-bar through a transformer,and the DC side of each charging and discharging management system is connected with a storage battery so as to control the two-way conditioning of active power and reactive power of the storage battery and PCC points formed by the main bus-bar and the public bus-bar in a range of upper limit and lower limit voltage values, so that the voltage and frequency of the PCC points are stable; and the main system monitor is in information interaction with the charging and discharging management systems through a plurality of CAN interfaces, and controls an external standby power to supply power to the high voltage main bus-bar or control unloading charges to consume electric energy output by the high voltage main bus-bar according to the instructions of the charging and discharging management systems, so that the voltage and frequency of the PCC points are stable. The invention is easy to realize, saves cost, and is suitable for combining an independent power system with a megawatt-class wind generating unit, and supplying power to offshore oilfield platforms and remote areas.

The invention relates to a water consuming method of a diamond wire cutting crystalline silicon production line. The diamond wire cutting crystalline silicon production line is provided with at leastone wire cutting machine, each wire cutting machine adopts a diamond wire saw for cutting silicon rods into silicon wafers, and circulating water coming from a water storage tank of the wire cutting machine washes a cutting part in the cutting process of the diamond wire saw; waste water after cutting part washing is collected and treated, and production water is obtained; and production water ismixed into circulating water, and circulating water is supplied to the wire cutting machine for usage. Waste water produced by the diamond wire cutting crystalline silicon production line is treated into production water, purified water is supplemented and used as circulating water to continue entering the diamond wire cutting crystalline silicon production line for cooling water and / or washing water after compositions are mixed, on the one hand, lots of water can be saved, and waste water discharging is reduced; and on the other hand, water consumption and a water discharge peak value can belowered, and the rated capacity of equipment is lowered.