10 results about "Unbalanced line" patented technology

A balanced line-unbalanced line converter is provided with: a balanced-side line having a first transmission line (2), one end (21) of which is a first signal end and the other end (22) of which is short-circuited, and a second transmission line (3), one end (31) of which is a second signal end and the other end (32) of which is short-circuited; an unbalanced-side line (4), one end (41) of which is a third signal end and the other end (42) of which is an open end, the unbalanced-side line (4) having a first transmission line section (43) that constitutes a first coupling line (C1) with the first transmission line (2) and a second transmission line section (44) that constitutes a second coupling line (C2) with the second transmission line (3); a first open stub (5) connected to one end (31) of the second transmission line (3); and a second open stub (6) connected to the unbalanced side line (4) and constituting a third coupling line (C3) with the first open stub (5).

The invention provides a flexible interconnection micro-grid group shared energy storage charge state equalization control method based on a dynamic convergence algorithm, and the method comprises the steps: firstly constructing a flexible interconnection micro-grid group model, employing a distributed and centralized cooperative layered cooperative control architecture, and constructing a layered communication architecture; then establishing a model in which p energy storage units are connected in parallel on the direct current side of the flexible interconnection micro-grid group, wherein the output power of a storage battery flows through a bidirectional DC-DC converter and is connected with a direct current bus; secondly, based on traditional V-I droop control, a self-adaptive I-SOC droop coefficient is introduced into a new V-I droop control expression, the droop coefficient is changed in real time according to the SOC of the energy storage unit and the magnitude of the output current, and voltage secondary control is introduced to maintain the stability of the DC bus voltage; and finally, the output voltage, the output current and the SOC value of the local energy storage unit are obtained, the average value of the output voltage, the output current and the SOC is calculated by adopting a dynamic convergence algorithm, and the convergence speed is accelerated. The method can improve the transient current sharing precision and the state of charge balance level of the energy storage unit in the scene of unbalanced line impedance, and avoids the reduction of the service life due to the excessive charging and discharging of the stored energy.

A power amplifier circuit includes an input terminal, amplifiers, phase shifters, a converter circuit, and an output terminal. Each of the amplifiers is configured to amplify an input signal that is a radio-frequency signal received through the input terminal. The converter circuit is configured to convert a pair of balanced lines to an unbalanced line. The output terminal is coupled to the unbalanced line. The converter circuit includes balanced terminals that are respectively coupled to corresponding ones of the pair of balanced lines. The phase shifter is coupled between the output of the amplifier and the output of the amplifier. The phase shifter is coupled between the output of the amplifier and the output of the amplifier. The phase shifter is coupled between the output of the amplifier and the balanced terminal. The output of the amplifier is coupled to the balanced terminal.

The present application provides a kind of balanced-unbalanced transformer that can match the impedance between the circuit of front stage and the circuit of rear stage in wider frequency band.The balanced-unbalanced transformer has: the first wiring, with the first end connected with the first balance line of one of transmission balanced signal and the second end connected with the second balance line of another of transmission balanced signal;The second wiring has the first end grounded and the second end;The third wiring has the first end connected with the second end of the second wiring and the second end connected with the unbalanced line of transmission unbalanced signal, and is electromagnetically coupled with the second wiring;The first capacitor has the first end connected with the first end of the third wiring and the second end grounded;And the second capacitor has the first end connected with the second end of the third wiring and the second end grounded, and the first wiring is electromagnetically coupled with at least one of the second wiring and the third wiring.

A balun includes a first wire including a first end connected to a first balanced line transmitting one of balanced signals and a second end connected to a first reference potential; a second wire including a first end connected to a second balanced line transmitting another one of the balanced signals and a second end connected to the first reference potential; a third wire that includes a first end and an open second end and is electromagnetically coupled to the first wire; a fourth wire that includes a first end connected to the first end of the third wire and a second end connected to an unbalanced line transmitting an unbalanced signal and is electromagnetically coupled to the second wire; a first capacitor connected in parallel with a part of the first wire; and a second capacitor connected in parallel with a part of the second wire.

A power amplifier circuit includes an input terminal, an output terminal, amplifiers, a balun, and semiconductor substrates. The amplifier amplifies a radio-frequency signal received at the input terminal. The amplifier further amplifies the radio-frequency signal amplified by the first amplifier. The balun is connected to the amplifier and converts an unbalanced line into two balanced lines. The amplifier and the amplifier are formed on the semiconductor substrate. One of the balanced lines is connected to a terminal of the output terminal. The other of the balanced lines is connected to a terminal of the output terminal. The frequency of a radio-frequency signal to be transmitted is 100 GHz or more. The balun is formed on the semiconductor substrate.

Provided is a high-efficiency power amplification circuit that uses a differential structure to amplify power. The power amplification circuit includes: an amplifier (107) that amplifies one signal (RF2) of a differential signal; an amplifier (108) that amplifies the other signal (RF3) of the differential signal; a transformer (101) having a primary winding (1011) and a secondary winding (1012) electromagnetically coupled to the primary winding (1011), one end of the primary winding (1011) being connected to the amplifier (107) and the other end being connected to the amplifier (108), one end of the secondary winding (1012) being connected to an unbalanced line (106) that transmits an unbalanced signal, and the other end being connected to a ground; and a capacitor (102) having one end connected to a midpoint of the primary winding (1011) and the other end connected to the ground.

A balanced line-unbalanced line converter includes a balanced-side line including a first transmission line having a first end portion as a first signal terminal and a second end portion short-circuited and a second transmission line having a first end portion as a second signal terminal and a second end portion short-circuited, an unbalanced-side line including a first transmission line portion having a first end portion as a third signal terminal and a second end portion as an open end, the first transmission line portion to constitute a first coupled line with the first transmission line and a second transmission line portion to constitute a second coupled line with the second transmission line, a first open stub connected to the first end portion of the second transmission line, and a second open stub connected to the unbalanced-side line, to constitute a third coupled line with the first open stub.

A transmission circuit (10) comprises an input terminal (T1), amplification circuits (130, 140), and an output terminal (T2). The amplification circuits (130, 140) each amplify an input signal which is a high frequency signal received by the input terminal (T1). The output terminal (T2) outputs the amplified signal to an antenna (ANT). The amplification circuit (140) includes amplifiers (141, 142) and a balun (150) which performs conversion from a pair of balanced lines to an unbalanced line. The pair of balanced lines include lines (151, 152). One end of the line (151) is connected to an output end of the amplifier (141), and the other end is connected to a ground potential (GND). One end of the line (152) is connected to an output end of the amplifier (142), and the other end is connected to a ground potential (GND). One end of the unbalanced line (153) is connected to an output end of the amplification circuit (130), and the other end is connected to the output terminal (T2). The driving states of the amplifiers (141, 142) are switched in accordance with the power level of the input signal.

The invention discloses a line area equipment line loss dynamic monitoring and analysis system, which comprises a data acquisition module, a data transmission module, an analysis and diagnosis module and a user interaction interface, and is characterized in that line loss monitoring nodes are distributed at a plurality of key positions, and a high-precision sensor module is arranged, so that line electric energy data can be comprehensively and accurately acquired. And a double-path filtering unit, a high-impedance amplification unit, a differential noise suppression unit and an analog-to-digital conversion unit in the signal conditioning circuit work cooperatively to filter, amplify, denoise and convert data, so that high-frequency noise and interference are effectively removed, and the data acquisition quality is improved. In the aspect of data processing and analysis, the three-phase unbalanced line loss calculation model is used for accurately calculating the line loss, anomaly detection is carried out in combination with an isolated forest algorithm, and the line loss anomaly condition can be quickly and accurately recognized. Dynamic monitoring, accurate analysis and diagnosis and timely early warning of the line loss are realized, the stability and safety of a power system are greatly improved, and energy waste is reduced.