108 results about "Transformer" patented technology

The invention discloses a transformer substation switch box operation mobile robot, a working method and a system, and belongs to the field of the mobile robots. The transformer substation switch box operation mobile robot comprises a robot body, a mobile platform, a mechanical arm, a two-dimension code scanner, a power supply management system, a motion control system and a visual sensing system, wherein the mobile platform is arranged at the lower part of the robot body, and is a crawler-type mobile platform; the power supply management system and the motion control system are arranged in the robot body; the mechanical arm is mounted above the robot body; the visual sensing system is mounted above the tail end of the mechanical arm; and the two-dimension code scanner is arranged under the robot body. The transformer substation switch box operation mobile robot has the characteristics of high precision, stability in operation, safety, reliability, etc., can realize the effect of artificial intelligence operation, and can replace humans to realize the effect of standard operation.

The invention relates to an online fault detection method for a reduced set-based downsampling unbalance SVM (Support Vector Machine) transformer. At present, the research of improving the performance of an unbalance data downsampling SVM algorithm comprises upsampling and downsampling. The SVM model calculating cost of the upsampling algorithm is increased. The downsampling algorithm is selected improperly sometimes, and thus the poor classifying effect is caused. The online fault detection method comprises the following steps: (1), acquiring a vibration signal of a transformer; (2), obtaining a noise reduction vibration signal; (3), obtaining multiple groups of fault detection feature data; (4), clustering by using a K-mean algorithm; (5), figuring out a weight value of each sample; (6), establishing a majority sample reduction vector solution optimization model; (7), obtaining an SVM fault diagnosis model; and (8), inputting a sample to be tested to an unbalance SVM detector trained in the step 7, analyzing a result output from the detector to obtain a working state of the transformer, and realizing online fault detection of the transformer. The online fault detection method is used for detecting the fault of the transformer online.

The invention discloses an electric transmission line monitoring communication system based on a super-distance wireless optical network. The system comprises a wireless private network communication sub-network or a wireless private network and optical fiber mixed communication sub-network, a super-distance optical fiber communication backbone network, a monitoring primary station and a system network manager. The super-distance wireless optical network is characterized in that the wireless private network and optical fiber mixed communication sub-network wirelessly converges monitoring nodes of a plurality of nearby towers in a transmission line, an OPGW (optical fiber composite overhead ground wire) optical fiber communication system realizes uplink of the multiple nodes wirelessly converged, the optical fiber convergence nodes are connected to a transformer substation through an ADSS (all-dielectric self-supporting optic fiber cable), the wireless communication sub-network converges nodes of a plurality of nearby towers from node to multiple nodes, convergence signals are transmitted to the transformer substation by a wireless node-to-node manner, and data transmission between the transformer substation and a power company headquarter is performed through the existing data networks.

A multi-winding high step-up DC-DC converter includes a three-winding transformer to transform a low DC voltage to a high DC voltage; a power switch to control the energy flux of the primary winding of the three-winding transformer based on turning on/off the power switch; a first diode to control the current of the first secondary winding of the three-winding transformer; a second diode to control the current of the second secondary winding of the three-winding transformer; and a third diode to control the current of the primary winding. When the DC-DC converter is in the first operation state, the switch and the second diode are in on state, and the first and the third diodes are in off state. When the DC-DC converter is in the second operation state, the switch and the second diode are in off state, and the first and the third diodes are in on state.

The present invention relates to a transformer (100) for the transfer of electrical power from a nacelle (250) of a horizontal-axis wind turbine to a turbine tower (350) of said wind turbine whereby the nacelle (250) is in revolute attachment to the tower (350), comprising: a primary winding (200) adapted for attachment to the nacelle (250), and a secondary winding (300) adapted for attachment to the turbine tower (350), which windings (200, 300) are in revolute alignment with each other, and configured for transfer of electrical power by induction from the primary winding (200) to the secondary winding (300). It also relates to a method for assembly or disassembly of a wind turbine.

The invention discloses a neutral point direct current online measurement device for a transformer, which comprises a Hall sensor, a copper bar, a transmission fiber, a signal processing module arranged in a box body, a photoelectric power conversion module, a measurement signal photoelectric conversion module and a power laser launching circuit module, wherein the copper bar penetrates through the two sides of the box body; the copper bar in the box body is sleeved with the Hall sensor; the signal processing module is used for receiving an output signal of the Hall sensor, converting the output signal into an optical signal and outputting the optical signal into the measurement signal photoelectric conversion module; the measurement signal photoelectric conversion module is used for converting the inputted optical signal into an electrical signal to output; the photoelectric power conversion module is used for providing power for the Hal sensor and the signal processing module; and the power laser launching circuit module is used for inputting medium power laser for the photoelectric power conversion module. The neutral point direct current online measurement device adopts the optical fiber to supply the energy and transmit the signals, blocks an over-voltage transmission path and improves the measurement stability and the accuracy.

The invention discloses a harmonic reactive power compensation device as well as a control method thereof. The device comprises a bypass cabinet, an input transformer, a control device and a power cabinet, the input transformer adopts three-phase input, poly-phase winding output and the zigzag connection means, the power cabinet comprises 3N identical power units, input terminals of R, S and T at a rectifier side of each power unit are connected at output sides of the transformer, so each power unit has an independent direct current power supply, and the power units are mutually insulated and secondary windings of the transformer are also mutually insulated; wherein, N power units form one phase by means of cascade connection, all the power units are in star connection or in triangle connection with three phases correspondingly and then are connected with a power network by a reactor. The invention has advantages of high reliability, flexible control, realizable harmonic reactive power continuous compensation, fast response speed, high net side power factors and low total current harmonic wave.

A circuit for attenuating a surge is disclosed that might include a conductor for receiving the surge, a capacitor, positioned along the conductor, for blocking the surge, and a gas tube having a first end coupled to the conductor and a second end coupled to a ground. The circuit might also include a transformer having a first wire and a second wire, the transformer being coupled to the conductor, a resistor coupled to the first and second wires of the transformer, a varistor coupled to the first wire of the transformer, and a diode coupled to the second wire of the transformer.

The invention provides a portable and visual inspection device for transformer substation equipment. The portable and visual inspection device for the transformer substation equipment comprises a bracket, an insulation supporting rod, a vidicon, a video signal transmitter, a video monitor, a steering engine and a remote control. The steering engine comprises a shell, a control arm and a circuit device. The circuit device comprises a wireless signal receiving module, a CPU control module, a control arm drive module and a power module. The video signal transmitter is electrically in signal connection with the vidicon. The video monitor is electrically in wireless signal connection with the video signal transmitter. The remote control is electrically in wireless signal connection with the wireless signal receiving module. The vidicon is fixed to the bracket. The insulation supporting rod is detachably connected with the bracket. The steering engine and the video signal transmitter are both installed on the bracket. The control arm of the steering engine can control the vidicon to focus. The portable and visual inspection device for the transformer substation equipment is simple in structure and convenient to carry, can provide real-time operation state videos of the transformer substation equipment, is convenient and safe to operate when used, and effectively improves the reliability of power protection; no inspection dead zone exists.

The invention discloses a steel grating plate press welder which comprises an oil tank (1), an upper cross beam (2), upright posts (3), a main oil cylinder (4), transformers (5), diode rectifying assemblies (6), slide blocks (7), an upper clamping plate (11), upper clamping cylinders (12), guide posts (13), a lower clamping plate (14), a lower cross beam (15), limiting plates (16), a bottom electrode (17), lower clamping plate cylinders (18), a servo motor (23), a ball screw (24) and a bottom electrode seat (26). The steel grating plate press welder is characterized in that: the upper end of the ball screw (24) is connected with a feeding frame (19); the lower sides at the two ends of the feeding frame (19) are connected with straight guide rail bottom plates (21) through straight guide rails (20); the lower ends of the straight guide rail bottom plates (21) are connected with the lower cross beam (15); the middle part at the upper end of the feeding frame (19) is connected with the lower clamping plate cylinder (18), and the two ends of the feeding frame (19) are connected with the guide posts (13); and the upper ends of the guide posts (13) are connected with the lower clamping plate (14). Therefore, the press welder is simple in structure, high in welding speed, high in feeding accuracy, convenient to use and particularly suitable for pressing steel grating plates.

A main transformer explosion fire extinguishing system pipe network explosion-proof device comprises a side face sleeve explosion extinguishing system pipe network explosion-proof unit and a top sleeve explosion extinguishing system pipe network explosion-proof unit. The side face sleeve explosion extinguishing system pipe network explosion-proof unit is structurally composed of long stand columns (A1), explosion-proof beams (A2), explosion-proof supports (A3) and an explosion-proof steel net (A4). The top sleeve explosion extinguishing system pipe network explosion-proof unit is structurally composed of long stand columns (B1), explosion-proof beams (B2) fixed to the long stand columns (B1) and explosion-proof supports (B3) arranged between the explosion-proof beams (B2). The main transformer explosion fire extinguishing system pipe network explosion-proof device has the beneficial effects that the explosion-proof device is the essential protective facility of a transformer serious explosion fire extinguishing system pipe network, and can maximally protect the transformer extinguishing system pipe network against influence of transformer explosion and prevent explosion parts such as transformer sleeves, ascending flanged bases and flanges from harming the extinguishing system pipe network and electric equipment and even personnel in the explosion direction.

The invention discloses a transformer substation safety protection system and relates to the transformer substation technology field. The system comprises a fence mesh, a first protection door, a second protection door and a monitoring host. The fence mesh comprises an infrared fence and a high-voltage pulse power grid. The infrared fence comprises an infrared correlation device. The infrared correlation device is arranged in a gap between leads of the high-voltage pulse power grid. Each protection door is provided with a fingerprint identification module, an electromagnetic lock and an image acquisition module. The fingerprint identification module and the image acquisition module are connected to a signal input terminal of the monitoring host. The monitoring host is used for controlling motion of the electromagnetic lock according to fingerprint information collected by the fingerprint identification module and human face information collected by the image acquisition module. The system possesses characteristics that safety and stability are high and a protection effect is good.

According to one embodiment, a digital protection relay includes an auxiliary transformer (2) which decreases a voltage of an electrical signal from a main circuit transformer (1) to a predetermined voltage; a detection resistance circuit (20) including a Π-type or T-type circuit including an input connected to an output of the auxiliary transformer (2); an analog detection circuit (3) which is connected to an output of the detection resistance circuit (20) and detects a quantity of electricity of an electrical signal from the auxiliary transformer (2); an A/D conversion circuit (4) connected to the analog detection circuit (3); a central processing device 5 which is connected to the A/D conversion circuit (5) and performs a protection operation; and a trip output contact (9) which is closed by processing of the central processing device (5) and operates an external breaker (21). In the digital protection relay, an input contact terminal 11 for inputting a test signal with a constant voltage from an external test device (13) to the analog detection circuit (3) as a signal corresponding to an output of the auxiliary transformer (2) is provided between the detection resistance circuit (20) and the analog detection circuit (3).

The invention provides a switching power supply device capable of ensuring the transient recovery of the voltage discharge of an electrolytic capacitor after the rectifying process, without the addition of power consumption. The switching power supply device comprises a rectifying circuit used for rectifying the AC voltage; an electrolytic capacitor used for rectifying and smoothing the AC voltage; a transformer used for applying a smoothed voltage onto the electrolytic capacitor; a switching element connected to the transformer (T); and a control circuit (Z1) used for enabling the switching on/off of the switching element. The control circuit (Z1) is composed of a start-up circuit (Z10) and a discharge circuit (Z14). The start-up circuit (Z10) is used for supplying the voltage of the electrolytic capacitor to the Vcc terminal of the control circuit (Z1). The discharge circuit (Z14) is connected with the Vcc terminal and is used for discharging the transient recovery voltage of the electrolytic capacitor.

Improved multi-sectional bobbin designs described herein define a channel suitable to accommodate a portion of the wire that transits from prior winding section to the next, wherein opposing walls of the channel so defined separate the transiting portion of the wire from both prior and next winding sections through a substantial entirety of the wires descent from an upper winding layer in the prior section to a lower winding layer in the next.

The invention relates to a novel LED (light emitting diode) lighting driving power supply, wherein the input end of the driving power supply is connected with the output end of the driving power supply via a feedback circuit; the feedback circuit comprises a voltage control loop, a current control loop and a PWM (pulse width modulation) regulating circuit; the feedback signals of the voltage control loop and the current control loop are input to the PWM regulating circuit by an optical coupler; the PWM regulating circuit is connected with a transformer circuit so as to control the output voltage; and in the current control loop, a triode is adopted to be matched with a sampling resistor so as to regulate the input duty ratio of the PWM chip, thereby regulating the output current and keeping constant current. The driving power supply combines the triode, a constant voltage source and the optical coupler to control a load end and the PWM controller of the whole circuit so as to output the constant current and constant voltage, thereby driving the LED. The novel LED lighting driving power supply needs few required apparatuses and is high in reliability.

The invention discloses a novel transformer station secondary cable alignment device. The device comprises a detected end and a detection end which are respectively arranged at two ends of a to-be-detected secondary cable, and a voltage measurement device used for measuring a voltage of the two ends of the secondary cable, wherein the detected end is provided with a power source, a switch K1, N wiring ends and N+1 wiring resistors connected in series between the power source and the switch, and the N wiring ends are respectively connected with wiring nodes of any two adjacent wiring resistors. The device is advantaged in that through setting alignment terminals, the wiring resistors are arranged among the alignment terminals, all the wiring resistors are connected in series with a certain voltage, a voltage of any two points of each wiring terminal can be determined, so a voltage difference table can be made, through voltage measurement of the other end of the to-be-detected secondary cable, determination of corresponding labels can be carried out through a table query method, cable alignment can be accomplished, the device is integrally convenient and rapid, and low cost and high precision are realized.

The present invention discloses a method for detecting a resonance point of a reduced-order generalized integrator based on a device for identifying relationship between a transmission line and a transformer. The method actively transmits a carrier signal with a specified frequency to a power grid through the device for identifying the relationship between the transmission line and the transformer. Firstly, voltage and current signals of the power grid at the access point of the device for identifying the relationship between the transmission line and the transformer are collected; secondly, according to the extracted voltage and current signal data, the harmonic voltage and harmonic current signals with the injection frequency are extracted by using the computational formula of the reduced-order generalized integrator; then, according to the cosine similarity formula, the cosine similarity coefficient of the extracted harmonic signals with the injection frequency are calculated; finally, the resonant frequency range is judged by the calculated similarity coefficient, and the range is further reduced after the above steps are repeated by changing the injection frequency. With the solution, the calculation amount is small, and the resonant frequency range of power grid can be detected in real time.

An output circuit sends out, to an input circuit, a control pilot signal generated by a voltage source. A voltage transformer is provided to a control pilot line on the output side of the output circuit, and a communication unit transmits and receives communication signals via the voltage transformer. A voltage transformer is provided to the control pilot line on the input side of the input circuit, and a communication unit transmits and receives the communication signals via the voltage transformer. A low-pass filter is provided to the control pilot line between the input circuit and the voltage transformer.

The invention discloses a design method of flyback switching power supply transformer shield windings. The design method comprises the steps of (1) selecting a transformer, determining a connection type of the transformer shield windings, and measuring a structural dimension of the transformer, (2) setting turns of the shield windings as fixed values, and obtaining structural capacitance between the windings of the transformer under the different turns of the shield windings by utilizing simulation software, (3) calculating a common mode current equivalence coefficient in the transformer underthe different turns of the shield windings, and drawing a function relation characteristic curve of the common mode current equivalence coefficient and the turns of the shield windings, and (4) obtaining the turns of the shield windings when the common mode current equivalence coefficient is minimum according to the drawn characteristic curve, namely the optimal turns of the shield windings for inhibiting common mode current of the transformer. Compared with the existing common mode inhibition technique, the method has the advantages of simple device manufacturing, low realization cost, overall device weight and volume reduction, obvious inhibition effect and the like.

The invention provides a transformer substation monitoring device, method and system and relates to the technical field of electric power. The device comprises a sedimentation acquisition unit, a horizontal displacement acquisition unit, a data processor and a display device, wherein the sedimentation acquisition unit is arranged at an underground position of a monitoring point and is used for acquiring sedimentation data of the monitoring point; the horizontal displacement acquisition unit is arranged at a ground surface position of the monitoring point and is used for acquiring horizontal displacement data of the monitoring point; the data processor is used for obtaining the sedimentation data and the horizontal displacement data and displaying the sedimentation data and the horizontal displacement data through the display device, and is also used for sending the sedimentation data and the horizontal displacement data to a remote terminal through a wireless manner so as to carry out analysis and early warning on the sedimentation data and the horizontal displacement data by the remote terminal. According to the transformer substation monitoring device, method and system, the sedimentation data and the horizontal displacement data of a transformer substation foundation can be acquired in real time and the analysis and early warning on the data are carried out by the remote terminal, and hidden dangers can be found in time so that operation safety of an electric power system is ensured.

The invention discloses an auto-switch-on device on the basis of power grid dispatching and an implementation method thereof. The system comprises a power grid dispatching automation sub-system, an auto-switch-on sub-system and a transformer substation monitoring sub-system, and is characterized in that the power grid dispatching automation sub-system is connected with the transformer substation monitoring sub-system via a communication network; and the transformer substation monitoring sub-system is connected with the auto-switch-on sub-system via a computer cache. The system and the implementation method of the invention can fulfill the functions of auto-switch-on and overload cutoff between and in the transformer substations and substitute for various existing auto-switch-on devices and systems which are already in use, thereby reducing the construction cost of the power grid, effectively improving the operational reliability thereof and guaranteeing the reasonable load distribution thereof.

The invention discloses an order information prediction system and method. The system comprises an extraction module, a preprocessing module, a model training module and a prediction module. The extraction module is used for acquiring the historical order information, the preprocessing module is used for preprocessing the historical order information, the model training module is used for carryingout model training on the preprocessing result, and the prediction module is used for performing online prediction on the online order. According to the method and the system, a bidirectional Transformer architecture is adopted to process the text and the data in the historical order information, so that more context information of the text and the numerical value and a deeper semantic relationship between the texts can be obtained, more effective information can be obtained, and the numerical value prediction accuracy is better.

An image forming apparatus comprises a plurality of image forming units that respectively form an image, and a plurality of voltage generation circuits that respectively generate voltages for driving the plurality of image forming units. Each of the plurality of voltage generation circuits comprises a voltage generation circuit having a transformer, and generates a voltage by a switching operation that is driven by changing an input voltage of primary side of the transformer, an oscillation circuit that generates a clock signal of a frequency that becomes a reference frequency of the switching operation and a setting unit that sets the frequency of the clock signal that the oscillation circuit generates. The setting units of the plurality of voltage generation circuits set the frequencies of the respective clock signals.

The invention discloses a light emitting diode (LED) drive circuit. The LED drive circuit comprises a transformer, a metal oxide semiconductor (MOS) tube, a power adjusting resistor, a direct current buffer circuit, a rectifying circuit and a voltage control circuit. When the voltage of a control end of the voltage control circuit is higher than of the threshold voltage of the MOS tube, breakover of the MOS tube is achieved, a current input by an external power supply passes by a first winding of the transformer, the MOS tube and the power adjusting resistor sequentially, and the rectifying circuit is powered on. When the voltage of the power adjusting resistor is similar to the voltage of a standard end of the voltage control circuit, the MOS tube is cut off, a second winding of the transformer charges a capacitor of the MOS tube through the direct buffer circuit, the rectifying circuit is powered on, and the first winding of the transformer supplies power to LED load through the rectifying circuit. When the capacitor voltage of the MOS tube is higher than the threshold voltage, breakover of the MOS is achieved again. The LED drive circuit can replace a power source to manage an integrated circuit (IC), simplifies the LED drive circuit and reduces the cost.

The invention relates to a current-type reduced matrix converter which includes a three-phase input power supply, an input filter, a matrix chopper, a high-frequency transformer, a current chopper, anoutput filter, and a load. The output ports R, S, T of the three-phase input power supply are correspondingly connected with the input ports R0, S0, T0 of the input filter. The output ports r1, s1, t1 of the input filter are correspondingly connected to the input ports r2, s2, t2 of the matrix chopper. The primary ports A, B of the high-frequency transformer are correspondingly connected with theoutput ports A0, B0 of the matrix chopper. The secondary ports a, b of the high-frequency transformer are correspondingly connected to the input ports a0, b0 of the current chopper. The output portsw, v of the current chopper are correspondingly connected with the input ports w0, v0 of the output filter. The output ports w1, v0 of the output filter are correspondingly connected with the ports w2, v2 of the load. The invention further discloses a control method of the converter. The current-type reduced matrix converter has excellent performance and high efficiency.