536 results about "Power division" patented technology

The invention discloses a double-channel hydrogen production system optimization control method for a multi-power-supply scene, and the method comprises the steps: constructing a double-channel hydrogen production system, and obtaining corresponding operation data; decomposing and reconstructing based on the operation data to obtain the initial input power of the electrolytic cell; formulating a start-stop rule of the electrolytic cell based on the initial input power; correcting the initial input power based on a start-stop rule to obtain actual hydrogen production power; an electrolytic cell mathematical model is constructed, and the unit hydrogen production cost and the energy conversion efficiency are obtained based on the actual hydrogen production power; establishing a target function based on the unit hydrogen production cost and the energy conversion efficiency; and optimizing the target function based on a multi-target particle swarm algorithm to obtain an optimal filtering reconstruction order and an electrolytic cell retention ratio, and completing power distribution and optimal capacity configuration of the double-channel hydrogen production system. Power division and capacity configuration of the alkaline electrolytic bath and the PEM electrolytic bath are achieved, the hydrogen production cost of the wind-solar coupled system is effectively reduced, and the energy conversion efficiency of the electrolytic bath is improved.

The invention provides a trajectory design method and system in an unmanned aerial vehicle hidden and sensing integrated network, and the method comprises the steps: firstly deducing a multi-listener cooperative receiving signal expression and a probability density function in the sensing integrated network with multiple cooperative listeners; then deriving a minimum detection error rate expression of multi-listener collaborative detection and an optimal power division ratio expression meeting covert communication constraints based on a maximum likelihood principle; and establishing an unmanned aerial vehicle track and scheduling optimization problem of anti-cooperative detection in the unmanned aerial vehicle hidden and inductive integrated network according to the deduced formula. And finally, iteratively solving the problem based on convex approximation and an ellipsoid method to obtain an optimal unmanned aerial vehicle trajectory and scheduling. According to the method provided by the invention, the covert communication requirement in the unmanned aerial vehicle communication perception integrated network can be well met, and the communication safety in the future unmanned aerial vehicle Internet of Things is improved.

The invention discloses a differential signal synthesis circuit of a double-IQ mixer, which belongs to the technical field of radio frequency microwave testing and comprises two single-ended IQ mixing modules, a 180-degree phase shift module and an in-phase combination module or a power division module. The single-ended IQ frequency mixing module is used for up-converting the single-ended IQ baseband signal to radio frequency or down-converting the radio frequency signal to the single-ended IQ baseband signal; the 180-degree phase shift module is used for converting an input signal into two paths of signals with a phase difference of 180 degrees; and the power division module is used for converting the radio frequency input signal into two paths of signals with the phase difference of 0 degree. According to the invention, the IQ mixer with a differential structure is constructed, so that the microwave band of the IQ mixer is comprehensively improved in the index aspects of local oscillator leakage, even-order component suppression, common-mode interference suppression, signal-to-noise ratio and the like; according to the invention, single-ended IQ mixers with various types and complete frequency bands can be constructed into a differential structure form, and signal indexes in numerous application scenes are improved.

The invention discloses a signal transmission method and device based on orthogonal matrix precoding. The method comprises the steps that four chaotic sequences X, Y, Z and W are generated through a four-dimensional chaotic model according to a key initial value; performing bit interleaving on the original data by using X and W to obtain first data; performing serial-to-parallel conversion and QPSK mapping to obtain a mapping signal; scrambling the subcarriers and symbols of the mapping signals by using Y and Z to obtain encrypted data; carrying out IFFT (Inverse Fast Fourier Transform) on the encrypted data, adding a cyclic prefix, and carrying out parallel-serial conversion to obtain an encrypted data stream; performing binary conversion and serial-parallel conversion on the key initial value to obtain a square matrix K, and shaping the square matrix K by using a public key to obtain a key matrix; performing serial-to-parallel conversion, QPSK mapping, IFFT, cyclic prefix addition and parallel-to-serial conversion on the key matrix to obtain a key stream; and performing linear superposition on the encrypted data stream and the key stream through power distribution to obtain a power division multiplexing orthogonal frequency division multiplexing signal, and transmitting the power division multiplexing orthogonal frequency division multiplexing signal.

The invention provides a high-reliability high-density three-dimensional integrated multichannel millimeter wave transceiving integrated radio frequency micro module, which adopts three-dimensional ceramic packaging as a packaging body and comprises an amplitude-phase unit and a transceiving unit, and the two units and a cover plate realize electrical vertical interconnection and airtight packaging through three-dimensional stacking. The micro module receives an input signal, the input signal enters a receiving channel after being selected by a switch, an amplitude-limiting low-noise chipset in the micro module carries out amplitude-limiting amplification on the received signal, then the received signal is output to an amplitude-phase multifunctional chip, and the received signal is synthesized and output after amplitude-phase adjustment and amplification. A transmitting input signal is input to the amplitude-phase multifunctional chip after being subjected to power division, is subjected to power amplification after being subjected to amplitude-phase adjustment and amplification, is selected by the transmitting-receiving switch, and is radiated and output through the antenna. A negative electricity protection circuit and a pulse modulation circuit are integrated in the micro module, and pulse control of transmitting and receiving work of the micro module is achieved. The micro module adopts a stepped heat dissipation technology of the chip, the substrate, the functional unit and the micro module, and has very strong practicability.

The invention particularly relates to a miniaturized broadband instantaneous frequency measurement receiver and a corresponding data processing method. The miniaturized broadband instantaneous frequency measurement receiver comprises a signal input port used for receiving an original radio frequency signal; the amplifying and filtering module is used for amplifying and filtering the original radio frequency signal and then outputting a first radio frequency signal; the first power divider is used for splitting the first radio frequency signal and outputting the first radio frequency signal to the multi-channel power division phase discrimination assembly; the multi-channel power division and phase discrimination assembly comprises a plurality of power division and phase discrimination modules and is used for carrying out instantaneous measurement on the signal frequency of the first radio frequency signal and outputting multi-channel video signals; the frequency measurement coding module is used for performing frequency measurement processing on the video signal and outputting a frequency code; wherein the signal input port is connected with the amplification filtering module and the power division phase discrimination module through microstrip lines; the power division phase discrimination module is connected with the frequency measurement coding module through a glass insulator. The size, the volume and the weight of the device all meet the requirement for miniaturization.

The utility model discloses an antenna device and a radar. The antenna device comprises a waveguide feed layer, a waveguide routing layer and a slot radiation layer, the waveguide feed layer comprises an outer waveguide cavity and an inner waveguide cavity, and a power division structure and a first inner waveguide transmission structure are arranged on the surface of the side, away from the waveguide feed layer, of the waveguide routing layer. An outer waveguide transmission structure and a second inner waveguide transmission structure are arranged on the surface of the side, close to the waveguide feed layer, of the waveguide routing layer, and the outer waveguide transmission structure is used for transmitting electromagnetic signals between the outer waveguide cavity and the power division structure. The first inner side waveguide transmission structure and the second inner side waveguide transmission structure are used for transmitting electromagnetic signals between the inner side waveguide cavity and the power division structure, and the slot radiation layer comprises a radiation slot arranged corresponding to the power division structure. The antenna device and the radar provided by the embodiment of the utility model have the advantages of high transmission efficiency, wide working bandwidth, flexible antenna layout, low batch production cost and the like.

The present disclosure relates to the technical field of antennas, and provides a circularly polarized antenna, an array antenna, and a communication terminal. The circularly polarized antenna comprises a radiation patch, a grounding layer, a dielectric layer, and a power division module; the radiation patch and the grounding layer are oppositely arranged, and the dielectric layer is located between the radiation patch and the grounding layer; the power division module comprises an input end and two output ends, and the phase difference between output signals of the two output ends is 90°; the radiation patch comprises a first feed point and a second feed point, the first feed point is electrically connected to one output end, and the second feed point is electrically connected to the other output end; the virtual connection line between the first feed point and the center of the radiation patch is a first line, the virtual connection line between the second feed point and the center of the radiation patch is a second line, and the included angle between the first line and the second line is less than 90°. The circularly polarized antenna has a small size and a compact structure.

The invention discloses a low-cost broadband direct synthesis type frequency source, belongs to the technical field of radar communication, and mainly solves the problem that a traditional direct synthesis type frequency source cannot simultaneously realize low phase noise, short frequency hopping time and low cost. The frequency source comprises a harmonic generation circuit, a power division circuit connected with the harmonic generation circuit, a switch matrix connected with the power division circuit, and a frequency mixing synthesis circuit connected with the switch matrix. Wherein the harmonic generation circuit is used for generating a harmonic signal, the power division circuit is used for dividing the harmonic signal into six paths, and the switch matrix is used for outputting two paths of 12-17GHz signals from the power-divided signals. Compared with the traditional direct synthesis type frequency source, the direct synthesis type frequency source disclosed by the invention has the advantages that one harmonic generator and one switch filter group are omitted, so that the direct synthesis type frequency source disclosed by the invention realizes a low-cost broadband direct synthesis type frequency source.

An antenna and a method for manufacturing the same are provided. The antenna includes a first substrate, a second substrate opposite to the first substrate, a plurality of radiation units on a side of the first substrate distal to the second substrate, and a waveguide power division structure between the first substrate and the second substrate. The waveguide power division structure has a waveguide cavity, includes an input opening and a plurality of output openings, and divides a signal input through the input opening into a plurality of sub-signals. The plurality of sub-signals are output from the plurality of output openings, respectively, and each of the plurality of output openings outputs one of the plurality of sub-signals to at least one of the plurality of radiation units.

The invention discloses a high-isolation waveguide three-way power dividing and combining network structure which comprises a waveguide three-way power divider and a waveguide three-way power combiner, and an amplifier is connected between the waveguide three-way power divider and the waveguide three-way power combiner. The waveguide three-way power divider comprises a power divider upper waveguide cavity and a power divider lower waveguide cavity which are symmetrically arranged, and the power divider upper waveguide cavity and the power divider lower waveguide cavity are connected through screws. The waveguide three-path power combiner comprises a combiner upper waveguide cavity and a combiner lower waveguide cavity which are symmetrically arranged, and the combiner upper waveguide cavity and the combiner lower waveguide cavity are connected through screws. Microwave signals are distributed by the waveguide three-way power distributor, amplified by the amplifier, and then combined by the three-way power combiner. By constructing a brand-new three-path power division and synthesis network architecture, the problem of mutual load traction of amplifiers in a traditional non-isolated network is solved, and the stability of power synthesis is improved.

The invention discloses a secret key following transmission system and method based on dynamic window encryption, and the system comprises a transmitting end which is configured to obtain a chaotic initial value and an original signal to be transmitted; processing the chaotic initial value through a public key encryption module and a first constellation mapping module to obtain encryption key information; the original signal is processed by a bit stream encryption module, a second constellation mapping module and a symbol encryption module to obtain encrypted information, the bit stream encryption module realizes bit stream encryption by using a disturbance sequence generated by a chaotic initial value, and the symbol encryption module realizes symbol-level scrambling by using a'dynamic window structure '; superposing the encrypted information and the encrypted key information by using a power division multiplexing module to obtain to-be-transmitted composite information; the composite information is converted into a time domain signal through fast inverse Fourier transform (IFFT), and signal transmission is carried out through a channel; and dual improvement of communication safety and communication efficiency is realized.

The invention provides a circularly polarized antenna, an array antenna and a communication terminal, and relates to the technical field of antennas. The circularly polarized antenna comprises a radiation patch, a grounding layer, a dielectric layer and a power division module. The radiation patch and the grounding layer are oppositely arranged, and the dielectric layer is located between the radiation patch and the grounding layer; the power division module comprises an input end and two output ends, and the phase difference of output signals of the two output ends is 90 degrees; the radiation patch comprises a first feeding point and a second feeding point, the first feeding point is electrically connected with one of the output ends, and the second feeding point is electrically connected with the other output end; a virtual connecting line between the first feeding point and the center of the radiation patch is a first line, a virtual connecting line between the second feeding point and the center of the radiation patch is a second line, and an included angle between the first line and the second line is smaller than 90 degrees. The circularly polarized antenna is small in size and compact in structure.

The invention discloses a design method of a novel Ka-band microstrip planar array antenna. The antenna has a dual-band working mode. By adopting the one-to-eight power division feed network, efficient feed of the array unit is realized, and good impedance matching is ensured. In addition, the designed decoupling structure DS effectively reduces mutual coupling between the antenna units, the mutual coupling effect is inhibited, and the antenna performance is further optimized. The dual-frequency working frequency band of the antenna is 34-35 GHz and 35-36 GHz, the inter-unit isolation degree is smaller than 35 dB, the average gain exceeds 13 dBi, and the H-surface half-power lobe width is smaller than 20 degrees. The antenna has the advantages of stable bandwidth, low isolation, high gain, high directionality and the like, and is suitable for multiple fields of millimeter wave communication, radar systems, satellite remote sensing and the like.

A phased array transceiver system having a feedback path, comprising at least one common TR channel, a plurality of branch TR channels, a power division and combination network, a feedback network, a feedback channel, and an error processing module, wherein the common TR channel sends a signal to the branch TR channels by means of the power division and combination network; each of the plurality of branch TR channels sends a signal from the outside to the common TR channel by means of the power division and combination network; one end of the feedback network is selectively connected to an antenna port of any branch TR channel by controlling a switch state, and the other end of the feedback network is connected to the feedback channel; the input end of the error processing module is connected to the output end of the common TR channel, and the output end of the error processing module is connected to the input end of the feedback channel. According to the phased array transceiver system having a feedback path of the present application, adding the error processing module solves the problem of feedback function deterioration or failure caused by insufficient chip isolation.

The utility model provides a large-bandwidth 220G terahertz emission front end, which comprises a frequency doubler, a filter, an amplifier, a one-to-two power divider, a first one-to-four power divider and a second one-to-four power divider, wherein the frequency doubler, the filter, the amplifier and the one-to-two power divider are sequentially connected, and the first one-to-four power divider and the second one-to-four power divider are respectively connected with two output ends of the one-to-two power divider. The output end of the first one-to-four power divider and the output end of the second one-to-four power divider are connected with four transmitter frequency doubling amplification modules. According to the utility model, input 15G-21.7 GHz low-frequency signals are subjected to frequency doubling amplification to obtain 30G-42.4 GHz signals, the 30G-42.4 GHz signals are divided into 8 paths of transmitter frequency doubling amplification modules 7 through two power division links, the 8 paths of signals are respectively controlled by a single-pole four-throw switch to obtain 32 paths of signals, the 60-84.8 GHz signals are obtained after frequency doubling amplification, and the 60-84.8 GHz signals are transmitted to the transmitter frequency doubling amplification modules 7. The signals are divided into 64 paths of signals under the control of a single-pole double-throw switch, and the 64 paths of signals are amplified by a frequency tripler to obtain final 180-260GHz emission signals. According to the utility model, emission of multi-channel signals can be simultaneously realized, and the production and manufacturing cost of the terahertz front end is obviously reduced.

The invention provides a radio frequency power division unit, a radio frequency power division module and a radio frequency receiving system. The radio frequency power division unit comprises a first low noise amplifier, a first single-pole single-throw radio frequency switch, a second single-pole single-throw radio frequency switch, a third single-pole single-throw radio frequency switch, a power divider, a fourth single-pole single-throw radio frequency switch and a fifth single-pole single-throw radio frequency switch; the input impedance of the input end of the power divider, the impedance of the first output end of the power divider and the impedance of the second output end of the power divider are all the same. According to the radio frequency power dividing unit in the embodiment, the impedance of the two output ends of the power divider can be completely matched with the input impedance of the transceiver connected with the rear stage of the power divider, so that the transmitted radio frequency energy cannot be reflected, and the maximum transmission of the radio frequency energy is realized.

The invention relates to the technical field of scatter communication, in particular to a narrow-edge traveling wave waveguide slot array antenna. Comprising an antenna housing which adopts a flanging design to protect an antenna surface; the slot radiation port is composed of a rectangular port array with horizontal short edges; the coupled feed port is composed of a rectangular port array with horizontal short edges; and the power division network is formed by cascading H-surface T-shaped power dividers and is formed by equally-divided and unequally-divided one-to-two power dividers. The problems that an existing panel antenna is low in gain, large in size and heavy in weight are solved.

The invention relates to the technical field of communication equipment, and provides a millimeter wave phased-array antenna PCB laminated structure and a preparation method thereof. The millimeter wave phased array antenna PCB laminated structure comprises an array element layer, a digital control-power supply layer, a radio frequency power layer and a PCB bottom layer, the array element layer comprises a radiation patch layer, a coupling feed layer and a reference ground layer which are arranged in a stacked mode, the digital control-power supply layer comprises a first ground layer, a digital signal wiring layer and a power supply layer which are arranged in a stacked mode, a radio frequency power division network circuit is arranged on the radio frequency power division layer, and the PCB bottom layer, the radio frequency power division layer, the digital control-power supply layer and the array element layer are sequentially arranged in a stacked mode. And a second ground layer is arranged between the radio frequency power layer and the PCB bottom layer. The millimeter wave phased-array antenna PCB laminated structure provided by the invention has the advantages of small thickness, simple assembly, high reliability and the like. Through the multi-layer superposition design, the functional modules are integrated on one PCB, space utilization is optimized, the external connection problem in the traditional design is avoided, the assembly process is simplified, and the production efficiency is improved.

The invention provides a power divider, a feed network and an antenna system.The power divider comprises a metal floor and a metal strip line, the metal strip line is arranged on one side of the metal floor in the direction perpendicular to the metal floor, and the metal strip line comprises a power dividing node, an input port, a first output port and a second output port; the metal strip line between the power division node and the first output port is a first output line, the metal strip line between the power division node and the second output port is a second output line, the two output lines respectively comprise a first node and a second node, and the metal strip lines on the two sides of the first node and the second node are different in impedance. And the difference between the length of the metal strip line between the power division node and the first node and the length of the metal strip line between the power division node and the second node is an integral multiple of a quarter working wavelength of the antenna system. According to the power divider, the feed network and the antenna system provided by the embodiment of the invention, reflection standing waves of the power divider, the feed network and the antenna system can be reduced.

The invention provides a time-sharing multi-channel power distribution system and a control method thereof, and the system comprises a microwave excitation source which is used for generating a continuous wave radio frequency signal; the common end of the multi-channel radio frequency switch is connected with the output end of the microwave excitation source, and the multi-channel radio frequency switch is used for switching a radio frequency signal to any one of a plurality of output channels of the multi-channel radio frequency switch in a time-sharing manner; the control module is electrically connected with the control end of the multi-channel radio frequency switch, and the control module is used for outputting a control signal according to a preset time sequence so as to drive the multi-channel radio frequency switch to be switched among different output channels; the directional protection module is connected between the microwave excitation source and the multi-channel radio frequency switch and is used for guiding reflection power from an output channel to a matched absorption load, so that the inherent problem of power division attenuation of a traditional power divider is solved; therefore, each output channel can obtain almost all original input power in the working gap, thereby greatly improving the power utilization rate and the transmission efficiency.

A waveguide antenna and a related device relate to the technical field of millimeter wave radars. The waveguide antenna comprises at least one power division unit and N waveguides, the at least one power division unit is used for dividing a first signal from a radio frequency chip into N paths of signals, the N paths of signals are transmitted through the N waveguides respectively, at least two waveguides in the N waveguides are different in length, and N is an integer larger than 1. The waveguide antenna can meet different requirements of different application scenes on the detection capability of the antenna at the same time.

The invention relates to a high-gain low-sidelobe antenna. The power divider comprises a first power division torsion network which comprises a channel arranged along a first direction and two sub-channels divided towards two sides of a second direction along the channel; the plurality of coupling grooves are distributed on the two sub-channels along a second direction; the number of the second power division torsion networks corresponds to the number of the coupling grooves, each second power division torsion network is arranged on one side of the corresponding coupling groove along a third direction, and each second power division torsion network extends along the first direction; the coupling slot is used for receiving a signal transmitted by the corresponding coupling slot and transmitting the signal to two sides of the first direction; and the number of the slot radiation units corresponds to that of the second power division torsion networks, and each slot radiation unit comprises a plurality of slot radiation slots distributed along the first direction. The antenna is compact in structure, and the sidelobe level is effectively reduced while high gain is met.

The invention discloses a multichannel broadband receiver, and belongs to the technical field of microwave radio frequency and electronic control, the multichannel broadband receiver comprises a multichannel down-conversion assembly, a local oscillator power component, a power interface control panel and a VPX connector, the down-conversion assembly adopts a cavity-divided integrated structure, multiple identical radio frequency links are arranged in the same cavity in parallel, and the VPX connector is connected with the local oscillator power component. Down conversion from a 2-18GHz radio frequency signal to a 1.3-2.3 GHz intermediate frequency signal is realized through two-stage frequency mixing; the power supply interface control board takes an FPGA as a core, integrates the functions of multi-path power supply conversion, driving isolation, state monitoring and the like, and realizes channel gain power failure storage and calling, BIT self-inspection, nanosecond rapid turn-off and multi-parameter real-time monitoring through software and hardware cooperation. Through collaborative innovation of the structure, circuit and control, high integration, high channel consistency, high isolation and high intelligence of the multi-channel receiver are realized, and the multi-channel receiver is suitable for the fields of high-performance radars, electronic countermeasures and the like.

The present disclosure provides a phase shifter, an antenna and an electronic device, and belongs to the field of communication technology. The phase shifter includes a plurality of phase shifting units, a first power division network and a second power division network; each phase shifting unit includes a first transmission structure and a second transmission structure; the first power division network includes a first feeding port and a plurality of second feeding ports; the second power division network includes a third feeding port and a plurality of fourth feeding ports; and the first transmission structure of the phase shifting unit is electrically connected to one second feeding port; the second transmission structure of the phase shifting unit is electrically connected to one fourth feeding port.

An electrical tilt feed network (1), comprising: a power division network (11), comprising a main path feeder (111) and branch feeders (112); and a variable delay module (12) connected in series on one branch feeder (112) and comprising a first electrical tilt switch (121), a second electrical tilt switch (122) and a plurality of delay lines (123), wherein the plurality of delay lines (123) have the same impedance and different lengths, and two ends of each delay line (123) are respectively electrically connected to the first electrical tilt switch (121) and the second electrical tilt switch (121). In the present disclosure, the conduction of any delay line (123) can be realized by means of excitation of an electrical signal, thereby simplifying the structure of the variable delay module (12), and reducing the size and weight of the electrical tilt feed network (1); in addition, controlling the electrical tilt switch on the basis of the electrical signal improves the response rate, thereby improving the phase switching efficiency.

A radio frequency power amplifier includes three amplification branches. Two amplification branches have narrow working frequency bands and respectively work on a frequency band A and a frequency band B. The other amplification branch works in a frequency band A and the frequency band B. The radio frequency power amplifier also includes an inter-frequency power division circuit and two circulators. The inter-frequency power division circuit performs inter-frequency power division on an output signal of a wideband amplification branch to output two paths of narrowband signals, and the two paths of narrowband signals are output after being subject to power combination with output signals of each narrowband amplification branch by the circulators.

The invention discloses a TR assembly based on SIP, and belongs to the technical field of active phased array radars. Wherein the component circuit comprises a radio frequency unit, a power management unit and a logic management unit, the radio frequency unit comprises a transceiving branch and a power division network, the transceiving branch is provided with four independent transceiving channels, one end of the power division network is connected with an external radio frequency interface, the other end of the power division network is connected with the four transceiving branches, and each transceiving branch is connected with an antenna port; the input ends of the power management unit and the logic management unit are connected with the low-frequency interface, the output end of the power management unit is connected with each electric component of the assembly circuit, and the output end of the logic management unit is connected with and controls the power management unit and the radio frequency unit; components arranged on different layers of the substrate are connected through the vertical interconnection structures of the electrical connecting pieces, and different layers of the substrate are connected through the vertical interconnection structures. The multifunctional four-channel miniaturized TR assembly provided by the invention has the advantages of ultra wide band, low port standing wave and selectable dual power.

The invention discloses a time period power anomaly monitoring method and system based on dynamic distance adjustment of meter code curve, relates to the field of power meter data anomaly monitoring, solves the problem that existing technical means cannot troubleshoot time period parameter power division errors, and the key points of the technical solution are: constructing a daily time-sharing parameter power curve Q based on the daily frozen data of the power meter, and calculating a daily time-sharing actual power curve R based on the hourly frozen data of the power meter; calculating the path cumulative distance of the daily time-sharing parameter power curve Q and the daily time-sharing actual power curve R through dynamic time warping DTW; when the path cumulative distance exceeds a threshold, judging that there is a power meter time-sharing parameter power anomaly in the daily time-sharing parameter power curve Q and locating the abnormal power, and when the path cumulative distance does not exceed the threshold, judging that there is no power meter time-sharing parameter power anomaly in the daily time-sharing parameter power curve Q; and analyzing whether the time period parameter power is divided incorrectly by comparing the daily time-sharing parameter power with the daily time-sharing actual power data.

The invention discloses a distributed photovoltaic acceptance capability assessment method based on transient voltage stability constraint, and the method comprises the steps: taking distributed photovoltaic as a research object, and considering an action mechanism of the distributed photovoltaic on the transient voltage stability of a power grid under a transient voltage stability time scale; establishing a low-dimensional voltage stability analysis model of the high-proportion distributed photovoltaic access receiving end power grid by combining the response characteristics of the dynamic elements of the power grid; based on the low-dimensional voltage stability analysis model, analyzing the influence of distributed photovoltaic access on a conventional power supply branch by adopting a branch decoupling method based on power division; and establishing a transient voltage stability analysis quantitative evaluation index, and evaluating the acceptance capability of the distributed photovoltaic system. According to the invention, the limit acceptance capability of distributed photovoltaic under the voltage safety and stability constraint can be comprehensively evaluated.