39results about How to "Does not affect power quality" patented technology

The invention relates to an intelligent high-precision voltage stabilizer with self-adaptive wide dynamic power supply. The main loop of the intelligent high-precision voltage stabilizer comprises one compensation transformer, 4 IGBTs (Insulated Gate Bipolar Translators) and an intelligent driving control system; the four IGBTs under the control of input power live wires and chopped waves are connected with a harmonic suppression inductor L1; a first contact (KM1) head and a second contact (KM2) head are connected with the tail end of a primary side of the compensation transformer (T1); and a third contact (KM3) head is connected in parallel with the first end and the tail end of a secondary side of the compensation transformer (T1). As a voltage value is adjusted and compensated by using a chopped wave control technique, wide dynamic power supply and high-precision voltage output are achieved.

A micro-grid system with micro-source half-bridge converters in series, including photovoltaic micro-sources, wind micro-sources, energy storage devices, AC / DC rectifier circuits, DC / DC conversion circuits, micro-source half-bridge converters, filtering The inverter, load, transformer, wind power and photovoltaic micro-source are connected in parallel to the DC side of the micro-source half-bridge converter through the AC / DC rectifier circuit or DC / DC conversion circuit, and the energy storage device is connected in parallel to the micro-source DC link. , the output side of each micro-source half-bridge converter is sequentially connected in series, and a three-phase system is built by a double-star combination, in which each phase is composed of two bridge arms, and each bridge arm is composed of N One or n power generating sub-modules are connected in series with an inductor, 2≤N≤50, N=n.

The invention relates to a control method and a control device for accessing an energy-storage photovoltaic system into an urban rail traction network, wherein the method comprises the following steps that: 1) whether a photovoltaic battery has energy output or not is judged; if so, the photovoltaic battery has the energy output, a first direct current / direct current (DC / DC) converter and a second DC / DC converter connected with the photovoltaic battery are turned on, the photovoltaic battery starts to work, and then, the operation returns to step 2); if the judgment result shows that the photovoltaic battery does not have the energy output, the photovoltaic battery does not have energy to output, the first DC / DC converter and a second DC / DC converter connected with the photovoltaic battery are turned off, the operation returns to the step 1), whether the photovoltaic battery has the energy output or not is continuously judged, after the operation is repeated for n times, the photovoltaic battery stops working, and the operation returns to the step 2) and other steps. The device comprises the photovoltaic battery, the first DC / DC converter, the second DC / DC converter, a bidirectional DC / DC converter and energy storage equipment. Compared with the prior art, the control method and the control device have the advantages that the energy loss is low, the work efficiency is high, the stability is high, and the like.

The invention discloses a method for remotely and automatically collecting parameters of a ship's power system. Firstly, the current operating parameters of electrical equipment are sampled and held, discretized, encoded, and modulated through a collector to form a high-frequency carrier signal through a coupling circuit of the collector. Coupled into the lighting grid cable, it is transmitted to the concentrator through the lighting cable. The concentrator filters the high-frequency carrier signal from the lighting grid cable, demodulates and decodes it, and obtains the current operating parameters of the electrical equipment. The coupling circuit in the collector of the present invention is conjugate-matched to the lighting cable of the ship, which can realize the maximum transmission power of the carrier signal. The filter circuit in the concentrator matches the lighting cable of the ship without reflection, and the high-frequency carrier signal filtered out is Interferenced by reflected waves, the noise of the ship's lighting grid within the communication frequency band is small, and it has a better communication signal-to-noise ratio.