32 results about "IPFC" patented technology

The invention relates to a multi-protocol fusion system and an IP communication and FC-AE-1553 communication method between nodes. The multi-protocol fusion system comprises an FC-MPIC node supporting FC-AE-1553 and IP, an FC switch, an FC-EG gateway and an Ethernet node. The FC-MPIC node is connected to the FC switch; the FC-MPIC node comprises an NC/IPFC node and an NT/IPFC node; the NC/IPFC node supports an FC-AE-1553 network controller and an IPFC function at the same time, and the NT/IPFC node supports an FC-AE-1553 network terminal and the IPFC function at the same time; the FC switch performs signal forwarding based on an address mapping table; the FC-EG gateway is used for accessing the Ethernet node to the FC network; and the Ethernet node is connected to the Ethernet. The multi-protocol fusion system realizes the organic unification of an IP non-real-time network and an FC-AE-1553 real-time network.

The invention relates to an FC-EG gateway and a communication conversion method between an optical fiber channel and the Ethernet. The FC-EG gateway comprises an Ethernet universal interface module, an FC universal interface module and a protocol conversion module. The Ethernet universal interface module is used for packaging and analyzing an Ethernet frame header and realizing the conversion of a physical layer and a data link layer; the FC universal interface module is used for performing photovoltaic conversion, electro-optical conversion, 8B/10B encoding and decoding, and packaging and analyzing of a universal frame header; and the protocol conversion module is used for converting an IPFC sequence and an IP message. The invention further discloses a communication conversion method between the optical fiber channel and the Ethernet by utilizing the FC-EG gateway. By means of the design of the FC-EG gateway, heterogeneous network IP fusion communication based on the Ethernet and the optical fiber channel is realized, so that the IP message in the ordinary Ethernet can access the FC network through the FC-EG gateway.

The invention discloses a variable-frequency air conditioner, a power circuit of an outdoor unit of the variable-frequency air conditioner and a PFC (power factor correction) control method. The power circuit comprises a rectifying circuit, a PFC circuit, an electrolytic capacitor group, a three-phase inverting circuit, a first voltage sampling unit, a second voltage sampling unit, a current sampling unit and a control unit, wherein the electrolytic capacitor group comprises N electrolytic capacitors connected in parallel and is connected between a positive terminal of a direct-current bus and a negative terminal of the direct-current bus, and N is an integer larger than 2; the first voltage sampling unit is used for sampling voltage Uac input to the PFC circuit; the second voltage sampling unit is used for sampling voltage Udc of the direct-current bus; the current sampling unit is used for sampling current iPFC of the PFC circuit during working; the control unit is used for generating control signals according to the voltage Uac, the voltage Udc and the current iPFC to control the PFC circuit, and reducing ripple voltage borne by the electrolytic capacitor group through closed-loop control on voltage of the direct-current bus. Therefore, ripple current is shared by the N electrolytic capacitors, the ripple current borne by each electrolytic capacitor is reduced, the heat generating amount of each electrolytic capacitor is reduced, the reliability of each electrolytic capacitor is improved, and the service life of each electrolytic capacitor is prolonged.

The invention discloses a prevention and control method considering the control mode of an IPFC. Various control modes of the IPFC are considered, and power system power flow calculation including a main control mode and an auxiliary control mode is performed by utilizing the power flow calculation iteration format under each control mode of the IPFC; a multi-objective optimization function integrating practicability and safety is constructed, and operation constraints of the power system and the IPFC are provided; and prevention and control power flow optimization of the power system is realized based on a particle swarm optimization algorithm. According to the invention, the static control potential of the IPFC can be fully mined, the optimization of power flow distribution during steady-state operation of the system is realized, and the practicability and the static safety level of the system are significantly improved.

The invention discloses a low-voltage power distribution network multi-end combined power supplying structure based on an IPFC. The structure comprises a first power supplying feeder line and a second power supplying feeder line. A double-power-supply automatic transfer switch ATS is connected between the first power supplying feeder line and the second power supplying feeder line. The first power supplying feeder line is serially connected with a coupling transformer. The second power supplying feeder line is parallelly connected with a coupling transformer. The interline power flow controller (IPFC) is connected between the two coupling transformers. The interline power flow controller (IPFC) is parallelly connected with the double-power-supply automatic transfer switch (ATS). The low-voltage power distribution network multi-end combined power supplying structure settles problems such as reactive power flow control shortage, low-voltage parallel power supplying reverse power operation and electromagnetic circulation in traditional power transmission line compensation control.

The invention provides a hybrid protocol switching network routing implementation method and device and network switching equipment, and the method is applied to the network switching equipment and comprises the steps: receiving to-be-forwarded data; determining a corresponding forwarding mode according to the data type of the to-be-forwarded data, and forwarding the data; wherein the data type of the to-be-forwarded data comprises FC-AE-1553 data of an avionics environment of a fiber channel, IPFC data and Ethernet data. The hybrid protocol switching network routing implementation method provided by the invention is used for solving the problem of simultaneous transmission of different protocols.

The invention discloses an IPFC-containing power system power flow optimization method based on MISOCP. The method comprises the following steps: S1, carrying out mathematical deformation and variablesubstitution of an IPFC conventional injection model, and building an IPFC model; S2, carrying out IPFC equality constraint convexity processing; S3, carrying out IPFC inequality constraint convexityprocessing; S4, adding a convex IPFC constraint into a linearized power flow optimization model; S5, carrying out MATLAB/GUROBI optimization calculation; and S6, according to an optimization result,obtaining an amplitude and a phase angle of an output voltage of the converter through reverse derivation. According to the IPFC-containing power system power flow optimization method based on the MISOCP, by utilizing mathematical deformation, approximate processing and binary expansion technologies, the convexity processing of an IPFC model is realized, a highly non-convex nonlinear optimizationproblem is converted into the MISOCP model, the model is high in solving speed, and a solution has global optimality. The method can accurately, efficiently and quickly complete the calculation of thepower flow optimization of the power system, is higher in practical value, and can provide theoretical and technical support for the online optimization and regulation of comprehensive FACTS.

The invention discloses an inter-line power flow controller oscillation suppression method by considering new energy fluctuation, relates to the fluctuation of renewable energy, provides an IPFC additional controller based on inherent frequency offset, quantifies the interaction effect between targets, and selects the superposition position of the additional controller. By compensating the synchronous torque coefficient of the specific oscillation mode, the inherent frequency of the mode is influenced, and the condition of forced oscillation generation is destroyed. Furthermore, an IPFC controller is improved into a multi-channel additional controller, a wide-adaptability forced oscillation suppression method considering new energy fluctuation is obtained on the premise of identifying andpositioning oscillation signals and determining disturbance source influence factors, and technical help is provided for the IPFC to deal with complex power oscillation under multiple disturbances ina multi-machine system.

The invention discloses an IPFC model taking injection power as a variable and a load flow calculation method thereof. The method specifically comprises the steps: directly taking the injection poweras the variable, enabling the injection power to be equivalent to the influence of IPFC on a controlled line, enabling the model not to relate to an injection voltage variable of an IPFC converter through mathematical deformation, and building a novel IPFC model. On the basis, the IPFC injection power is directly used as a state variable of the IPFC in the load flow calculation process, an IPFC load flow calculation iterative update equation with line power as a control target is constructed, and a target difference value and a system state quantity are controlled according to each iteration.The IPFC model provided by the invention has the advantages of simple modeling, good model convergence and high convergence precision. According to the load flow calculation method of the IPFC model,load flow calculation of a large power grid containing the IPFC can be rapidly and accurately achieved, and an application value and a control potential of the IPFC in an actual power grid can be mined.

The invention discloses a prevention and control method for an I-PFC-containing power system taking a wind power scene into consideration. The method specifically comprises the following step: establishing a prevention and control optimization model for the IPFC-containing power system taking the wind power scene into consideration. The Markov chain model is adopted for generating the wind power scene, and the method is simple in process, high in calculation speed and suitable for prediction of a short time scale; prevention and control ensure that power flow does not exceed a limit after an anticipated accident (N-1 fault) occurs, and related power flow calculation is N-1 power flow calculation containing IPFC; and a main problem is solved by adopting a particle swarm algorithm, and whether the algorithm is converged or not is judged. According to the method, introduction of various scenes and probability scenes of wind power access is considered, so the model gives full play to the stability adjustment function of the IPFC in a limit scene; and meanwhile, the economical efficiency of the system during normal operation can be considered, so the method has high adaptability to complex and changeable operation scenes of the power system and has engineering practical significance.

The invention discloses an IPFC planning configuration method considering multi-flexible equipment adjustment capability, and the method fully considers the multi-flexible equipment adjustment capability, and builds a multi-target optimization model of IPFC planning configuration with the minimum IPFC investment and the maximum available power transmission capability of a system as optimization targets; and solving the provided multi-target optimization model based on a multi-target algorithm nested by a multi-target particle swarm algorithm and an interior point method, solving the available power transmission capacity of an IPFC-containing system by adopting the interior point method in an inner layer of the algorithm, and calculating a Pareto solution set of IPFC planning configuration by adopting the multi-target particle swarm algorithm in an outer layer. The model can fully consider the mutual supporting effect of the existing flexible equipment of the system, the corresponding solving algorithm can accurately and efficiently complete optimization calculation, the practical value is large, and theoretical and technical support can be provided for planning configuration and demonstration application of the IPFC.

The invention discloses an oscillation suppression method and system, a readable storage medium and computing equipment, and the method comprises the steps: obtaining a frequency difference of a main control line causing oscillation, carrying out the lead-lag control of the frequency difference, adding the active power obtained through the lead-lag control into outer-loop constant power control, carrying out the oscillation suppression, and achieving the suppression of oscillation caused by the IPFC to the connected main control circuit is realized, so various oscillations caused by faults of different main control circuits can be suppressed through a single IPFC.

The invention discloses a method and system for improving reactive power support capability, a storage medium and computing equipment. As for an IPFC converter for improving the reactive power support capability, when a main control line connected with the IPFC converter fails, the dynamic amplitude limiting values of active current and reactive current are obtained according to the actually measured active current and reactive current; and the active current and the reactive current output by outer loop control are subjected to amplitude limiting through the dynamic amplitude limiting values, so that the reactive output of the IPFC converter is improved, and the reactive support potential of the IPFC converter is released.

The invention discloses a method and device for evaluating an installation scheme of an inter-line power flow controller, and electronic equipment, and the method comprises the steps: calculating the power flow distribution of a regional power grid in a normal operation mode, and judging a key section which can be installed and a line with a heavier load of the section; determining a main control line and an auxiliary control line for each key section line; establishing an upper-layer power regulation and control optimization model and a lower-layer benefit optimization model; and according to a system operation boundary condition, substituting the capacity of each end designed by the IPFC into the upper and lower layer models for solving, and obtaining an optimal installation scheme. According to the method and device, an IPFC installation scheme evaluation problem is converted into a hierarchical model optimization solution problem, calculation is simpler and faster, and reference can be provided for planning and construction of a power transmission network.

The invention discloses a site selection and constant volume method for an inter-line power flow controller, and the method comprises the following steps: defining a system static safety margin comprehensive evaluation index, and comprehensively evaluating the operation state of each line after N-1 different fault occur to obtain an IPFC site selection adaptability index; performing IPFC step-by-step site selection; determining a line with the worst adaptability index as an IPFC main control line, scanning buses at the two ends of the main control line, and taking a line with the optimal fitness index in the lines connected with the two buses as an auxiliary control line; on the basis of site selection research, carrying out the IPFC optimization constant volume research, and performing the optimization selection on the capacity of each converter of the IPFC through an intelligent algorithm. According to the invention, the cost of the inter-line power flow controller can be reduced, the power flow of the power system can be accurately and effectively controlled, and the line overload phenomenon is avoided.

The invention discloses an inter-line power flow controller site selection method and device and electronic equipment, and the method comprises the steps: calculating the power flow distribution of a power grid in a normal operation mode, and judging a key section and a heavy-load line; aiming at the N-1 operation mode of the key section line, a line power flow and a bus voltage change rate matrix at two ends of the line are calculated, and the change rate matrix is normalized; and meanwhile, a hybrid direct current access receiving end power grid scheme optimization model is constructed in combination with the power transmission line distance, an IPFC access power grid site selection optimization model is solved, and an optimal installation branch is obtained. According to the method, an IPFC site selection optimization problem is converted into a single function network access optimization problem, the calculation is simpler and faster, and reference can be provided for planning and construction of a power transmission network.

The invention discloses a power system power flow optimization method considering double-circuit IPFC control characteristics, the power flow optimization method comprises an optimization model and a solving method of the optimization model, and constraint conditions of the optimization model comprise IPFC operation constraint, system operation constraint and equality constraint and inequality constraint of the double-circuit IPFC control characteristics. The objective function of the optimization model considers the economical efficiency and the static safety of the power grid at the same time, the constraint condition also considers the related constraint of the control characteristics of the double-circuit IPFC besides the conventional operation constraint, and the optimization model is relatively comprehensive and rigorous; the considered control characteristic of the IPFC is different from that in the existing research, the injection voltage of the IPFC before and after the fault is kept unchanged, but the power flow of the power transmission section where the IPFC is located before and after the fault is kept unchanged as much as possible; the considered control characteristics of the IPFC are more suitable for engineering practice, and the control characteristics of the IPFC are accurately considered.

The invention discloses a method for calculating the power flow of a power system containing IPFC through MATLAB and BPA combined simulation, and belongs to the technical field of power system operation analysis and simulation. The specific process of the method is as follows: IPFC (Intelligent Power Factor Correction) solution calculation is carried out in MATLAB (Matrix Laboratory); power grid power flow calculation is carried out in a BPA; interaction of two kinds of simulation software is carried out through a data exchange interface compiled in MATLAB; the data exchange interface reads input information from a PFO file; the input information is transmitted to an IPFC calculation program in the MATLAB to execute the solution calculation of the IPFC; and after calculation is completed,the IPFC calculation program transmits the output information to the data exchange interface, writes the output information into a corresponding position in a DAT file of the BPA through the data exchange interface, and then calls a power flow calculation program of the BPA by using the data exchange interface to perform power flow calculation on the DAT file to generate a new PFO file. Accordingto the method, the power flow calculation of a large power grid containing an IPFC can be conveniently and accurately realized, and great convenience is brought to the evaluation of the application value and the control potential of the IPFC in an actual power grid.