69 results about "System generator" patented technology

The invention discloses a new energy electric power reduction panorama analytic system and a method. The new energy electric power reduction panorama analytic system comprises an input module, an electric system generator set maintenance plan module, a random production imitating and starting composite module, a peak modulation analytic module, a frequency modulation analytic module, a panorama type new energy reduction scale calculating module and an output module. According to the new energy electric power reduction panorama analytic system, an omnibus new energy electric power large-scale development reduction panorama analytic processing platform is constructed, generation models using new energy sources such as wind power are embedded into an electric power system maintenance plan, random production imitating and starting composite calculation, peak modulation analysis, frequency modulation analysis and new energy reduction scale calculation, a comprehensive evaluation system and a method for the new energy electric system are constructed, and the system covers systematic planning, operation, scheduling and stages of a year, a week, a month, a day, a minute (in) and is used for analyzing the consumption of new energy wind power grid combination in large scales in an all-around and all-time mode.

Methods for treating a network of organs including generating a map of at least a portion of the network of organs using a rendering system; selecting at least one treatment location within the luminal passageway of the network of organs; and applying an energy therapy to the treatment location to treat the smooth muscle tissue, where the energy therapy applied to the respective treatment location is defined by a plurality of parameters that are associated with a map. Such a system allows for historical or ideal treatment parameters to be identified, visually or otherwise to actual treatment locations. Also, control systems and methods for delivery of energy that may include control algorithms that prevent energy delivery if a fault is detected and may provide energy delivery to produce a substantially constant temperature at a delivery site. In some embodiments, the control systems and methods may be used to control the delivery of energy, such as radiofrequency energy, to body tissue, such as lung tissue.

A solid state, radiant energy power generator and control system for heating an object in a radiant energy cavity—a radiant energy heated oven—is disclosed, where the system includes a digital processing unit (DPU), an DPU interface, a device controller, a frequency regulator, a voltage control oscillator, a power regulator, an amplifier, and a reverse / forward power sensing means.

A system and method for monitoring and controlling an electrically driven transport refrigeration unit under varying operating conditions while maintain the system generator within its electric current and temperature limitations is disclosed. Specifically, the present invention the management of generator power through the combined use of controls for a suction modulation valve (an "SMV"), for diesel engine speed control, and for electronic expansion valve ("EXV") superheat settings.

The invention relates to a microgrid multi-energy economic method based on a positive and negative feedback particle swarm optimization algorithm. The method comprises: step one, an optimization objective function for optimizing the system generator output and minimum power generation cost is established under the circumstance of satisfying the system operation constraint condition; step two, setting a constraint condition of the optimization objective function from the step one; and step three, carrying out optimization calculation by using a positive and negative feedback particle swarm algorithm, setting various parameters of the algorithm, and then starting iterative calculation to obtain an optimal solution of the optimization objective function from the step one. According to the invention, with a dynamic double-population particle swarm structure and linear decreasing inertia weight calculation, multi-energy scheduling of the micro grid is optimized effectively.

A system and method for monitoring and controlling an electrically driven transport refrigeration unit under varying operating conditions while maintain the system generator within its electric current and temperature limitations is disclosed. Specifically, the present invention the management of generator power through the combined use of controls for a suction modulation valve (an "SMV"), for diesel engine speed control, and for electronic expansion valve ("EXV") superheat settings.

A system to emulate manual filing system by storing and processing document that operates on Relational Database Management System (RDBMS), comprising; a String Template (1) having at least one details of document number, number of sections and number of rows defined based on at least one Input; a String Module (2) for generate a Electronic Document (eDoc) (11) having at least one Electronic Document Identifier (eDoc-Identifier), Section, Rowtype and Column by validating the document number, number of sections and number of rows based on the String Template (1); a Extraction Module (3) for extracting the Electronic Document Identifier (eDoc-Identifier), Section, Rowtype and Column of Electronic Document (eDoc) (11) generated by the String Module (2) for retrieval process; a Electronic Form (eForm) Generator Module to create at least one Electronic Form (eForm) having a Predefined Program based on a Electronic Dictionary (eDict) data; a Flow Diagram having pre-compiled task program set by at least one user; a Electronic Business Processing Module (eBPM) Generator to generate at least one task program based on the Flow Diagram to be stored into the Electronic Document (eDoc); a Mapping Generator Module to generate data mapping program based on a graphical information; a Transaction Processing Module to store the generated Mapping Program; a System Generator Module to generate process control and business rules into pre-compiled program using Electronic Business Processing Module (eBPM); a Virtual Memory for storing the Electronic Document (eDoc); and a Web-Read Module (4) for retrieving the Electronic Document (eDoc) from the Virtual Memory based on at least one identifier of Electronic Document (eDoc), in which the identifier is extracted based on the captured data entry of Electronic Form (eForm).

The invention provides an oil-displacement experimental device used for a low-permeability sandstone oil reservoir and an oil-displacement experimental method used for the low-permeability sandstone oil reservoir. The device comprises a core holding unit, a water intermediate container, a constant-pressure and constant-speed pump and a water-gas dispersion system generator, wherein the constant-pressure and constant-speed pump is connected with the water intermediate container; the water intermediate container is connected with the core holding unit through the water-gas dispersion system generator; the core holding unit is used for containing a core sample; the core sample is subjected to gas displacement in the core holding unit; the water-gas dispersion system generator is heated to the set temperature; the constant-pressure and constant-speed pump exerts the pressure of deionized water in the water intermediate container to the set pressure; the deionized water with the pressure reaching the set pressure is injected into the water-gas dispersion system generator to form a water-gas dispersion system; and the water-gas dispersion system is used for performing oil-displacement experiment on the core sample in the core holding unit. The device and the method have the advantages that the realization principle is simple; the flow seeping resistance can be obviously improved; a gas channeling passage is sealed and plugged; and the recovery degree of the low-permeability core is improved.

The invention discloses a method for achieving MFCC (Mel Frequency Cepstrum Coefficient) parameter extraction by a field-programmable gate array. The method belongs to a signal processing technology of an electronic information. The device comprises pre-emphasis processing, framing processing module and the like, the parameter extraction method comprises the following steps of: carrying out the pre-emphasis processing, carrying out the framing processing, carrying out the windowing processing, carrying out discrete power spectrum estimation, carrying out Mel triangular filter bank filtering, carrying out natural logarithm and discrete cosine transform on a voice signal of to-be-extracted MFCC characteristic parameters to obtain the MFCC parameters. The invention has the beneficial effects that some modules developed by Xilinx are embedded in a Simulink bank by improving each part of data processing modules and by means of a System Generator development tool of an Xilinx company, fixed-point simulation is carried out in Simulink, and HDL (Hardware Description Language) files are generated and called in ISE, development of an MFCC characteristic extraction hardware is rapidly achieved, a signal processing speed and a research and development period are improved.

The invention relates to an assessment method of dynamic voltage recoverability of a sending end alternating-current and direct-current hybrid system after failing. The assessment method includes equating statically a practical system into an equivalent system, solving the dependency of the power angle of a system generator and an output power and the dependency of voltage and power angle, solving an acceleration area and a retardation area, and solving equivalent area stability margin (EASM) index. The higher the EASM index is, the higher the dynamic voltage recoverability of the sending end alternating-current and direct-current hybrid system after failing is. On the premise of not performing a time-domain simulation, the dynamic voltage recoverability of the sending end alternating-current and direct-current hybrid system after failing can be assessed with the assessment method, so that strength of the alternating-current and direct-current hybrid system is reflected. The EASM index can reflect affections of multiple factors on the voltage recoverability; and the multiple factors include generator inertia time constants, system short-circuit ratio, system initial working condition and the like. The problem that simulation precision has to be as precise as a generator inertial time constant in time-domain simulations is avoided.

The invention discloses a desalinating technique of seawater through water source heat pump under negative pressure condition, wherein the system is composed of seawater source heat pump, jet vacuum pump, generator and pump; a lower pressure condition is formed in the generator to evaporate the seawater with temperature elevated; the steam is leaded into next generator acted by jet vacuum pump to release potential heat and evaporate seawater, which realizes the utilization effectively; the steam condensate is extracted from the generator to product fresh water. The invention improves the energy utilizing efficiency as heat supplying equipment in winter, which releases the heat pollution of circulating condensate of electric factory due to low temperature of outlet water of seawater source heat pump evaporator and system generator.

The invention relates to an excitation control system for a hybrid power system generator and a method thereof. A power voltage dual-closed-loop control way is adopted; the generator works in a constant-power voltage-limiting mode by adjusting the generator current, so that power distribution control between an internal combustion generator set and a power battery pack in a series direct-coupled oil-power hybrid power system is realized, the floating charge voltage and maximum charging current of the power battery pack are limited, and the safety and the cycle lives of power storage batteries are ensured. The excitation control system has the advantages that 1, the absolute values and change rates of errors are detected according to the stable state and dynamic response situation of a controlled system; 2, the excitation current of the generator is controlled according to an entire controller, so that optimal power distribution of a front power chain is realized; the internal combustion generator set and the power battery pack with minimum power are configured, so that the manufacturing cost, size and weight of equipment are reduced greatly, and the average efficiency of an internal combustion engine is increased.

The invention relates to a technology in the field of power system detection, in particular to an implementation method for sub-synchronous interaction inhibition for a double-fed wind farm. According to the method, an equivalent circuit model is designed according to a structural design of an actual power system; a sub-synchronous oscillation frequency of the actual power system is obtained by simulation; and the same low-pass filters are added in front of a d-axis current signal input end and a q-axis current signal input end of a rotor side converter controller of a double-fed wind farm system generator respectively, so that the sub-synchronous interaction is inhibited. The implementation method is simple and practical; adverse effects on the control performance and protection cooperation of the controller can be avoided under the premise of ensuring the sub-synchronous interaction inhibition effect; and the method has important engineering application value for safe and stable operation of a large-scale centralized wind power transmission system.

The invention discloses a method for estimating the dynamic state of a generator based on an adaptive H infinite cubature Kalman filter, and the method is used for enhancing the robustness of a dynamic state estimator under the condition of model parameter uncertainty, and the accurate estimation of the state of a power system generator is realized. According to the method, based on the H infinitecubature Kalman filter (HCKF), an adaptive H infinite cubature Kalman filter dynamic estimation method is established by introducing an adaptive method, the method can define the influence of systemmodel parameter uncertainty on a state estimation result and avoids the problem that a HCKF method has uncertain upper bound parameters and the selection is difficult. According to the method of the invention, the state estimation precision can be effectively improved, the robustness of a state estimator is enhanced, the realization process is clear, and the method has a high engineering application value.

The invention relates to the technical field of dispatching automation of an electric power system, in particular relates to a day-ahead static security correction method. The security correction method comprises the following steps of step 1, pre-checking and correcting a power planned value of an interregional junctor section; step 2, carrying out AC (alternating current) power flow calculation, and calculating balancing nodes and unbalanced active power in each region; step 3, judging whether the absolute value of the unbalanced active power is less than a convergence criteria; if the absolute value of the unbalanced active power is greater than the convergence criteria, adjusting an adjustable unit and the loaded active power, and returning to the step 2; and otherwise converging power flow, utilizing the power flow calculation result to calculate N-1 and fault set. According to the invention, the active power transmitted by the junctor section is controlled by the planned value, and mismatch quantity between a generation schedule of a system generator set and bus load prediction data is eliminated through partitioned iteration, and a reasonable day-ahead AC (alternating current) power flow section is provided to improve reliability and practicability of day-ahead security correction of the electric power system.

The invention discloses and relates to a novel floor heating device. The device integrates a solar heat-collecting system and a Rankine-Rankine circulation system, utilizes a boiler to perform auxiliary heating and belongs to the fields of solar photothermal utilization, power circulation and heat ventilation and air-conditioning utilization. The device has the characteristics that hot water in a heat storage water tank is mainly provided by the solar heat-collecting system; when the temperature of the heat storage water tank is lower than a certain temperature, the boiler is started to perform auxiliary heating; the heat storage water tank is connected with an organic Rankine circulation system generator and a floor heating coiled pipe sequentially to realize gradient utilization of energy sources; an expansion machine and a compressor adopt a coaxial connection structure, so the link of converting mechanical energy into electric energy is reduced and the conversion efficiency of the mechanical energy is effectively improved; a condenser on the side of the expansion machine is connected with an evaporator on the side of the compressor, so the utilization efficiency of the energy sources is improved by utilizing regenerative cycle; and the condenser on the side of the compressor and the floor heating coiled pipe are connected to realize heating. The device has the advantages of simple structure, remarkable energy-saving effect, convenience for control and the like.

The invention discloses an additional emergency control method for security and stability of a large power grid. During the large-scale power system fault process, additional emergency control in security and stability control decision is realized by a regional projection energy function method, thus making additional control of a regional power grid possible when a power system breaks down and raising power system analysis efficiency and security of the power system. According to the method, a multidimensional generator angle system is projected to a rotary one-dimensional axis system, a projection kinetic energy curve which represents motion of the system generator is extracted, and the minimum projection kinetic energy capable of representing instability degree of the power system is calculated, thus providing an important basis for emergency control of the power system. By the method, false fault continuous trajectory integration process of a previous mixed algorithm is avoided; stable level and safety margin of transient stability of various sampling states can be quantitatively provided; and the requirement on real-time performance of power system information is satisfied.

A solving method for a power system multi-dimensional space cross section thermal stability limit boundary includes calculating power transmission distributed factors of power system generator capability change on cross section circuits according to a direct-current power flow model; selecting a sensitive unit or a cluster having remarkable effects on cross section power flow according to the power transmission distributed factors; using active capability of the sensitive unit or the cluster as the multi-dimensional space coordinate axis, using power flow practicable circuit thermal stability constraint meeting the N-1 condition as a criterion, searching thermal stability limit points of the cross section in a multi-dimensional space; building the multi-dimensional space cross section thermal stability limit boundary according to all the searched thermal stability limit points. By means of the method, change conditions of thermal stability limit of the cross section along with sensitive factors can be reflected truly, the transmission capacity of the cross section is no longer a fixed value but is a complex boundary in the multi-dimensional space, and mode operation arrangement of a power system is flexible. Safety margin information of the current operation state of the system can be provided according to the distance between a current operation point and the boundary.

A system to emulate manual filing system by storing and processing document that operates on Relational Database Management System (RDBMS), comprising; a Electronic Document (eDoc) (11) having at least one Electronic Document Identifier (eDoc-Identifier), Section, Rowtype and Column; a Electronic Form (eForm) Generator Module to create at least one Electronic Form (eForm) having a Predefined Program based on a Electronic Dictionary (eDict) data; a Flow Diagram having pre-compiled task program set by at least one user; a Electronic Business Processing Module (eBPM) Generator to generate at least one task program based on the Flow Diagram to be stored into the Electronic Document (eDoc) (11); a MappingGenerator Module to generate data mapping program based on a graphical information; a Transaction Processing Module to store the generated Mapping Program; a System Generator Module to generate process control and business rules into pre-compiled program using Electronic Business Processing Module (eBPM); a Program Module having at least one Electronic Form (eForm) to capture data entry based on set of instructions and data fields that pre-defined in at least one Electronic Dictionary (eDict); a Virtual Memory for storing the Electronic Document (eDoc) (11); and a Web-Read Module (4) for retrieving the Electronic Document (eDoc) (11) from the Virtual Memory based on at least one identifier of Electronic Document (eDoc) (11).

The invention discloses a real-time simulation method for a modular multilevel converter. By using the real-time simulation method, the dynamic characteristics of the current and the voltage can be accurately simulated, and the calculation complexity is low. According to the invention, a backward Euler method is adopted to discretize a bridge arm inductor and an MMC sub-module DC side capacitor, and a single-port network of the MMC sub-module is obtained by means of the Thevenin equivalent theorem, so that an equivalent circuit model of a bridge arm is obtained. The real-time simulation methodcan accurately simulate dynamic characteristics of current and voltage, can greatly reduce the calculation complexity, and can save a large amount of logic resource consumption during hardware simulation. Besides, real-time simulation method builds a simulation model on a System Generator platform in a module assembly connection mode, is more visual and convenient to build the simulation model, compared with traditional programming development, and is more efficient in verification and testing in the early design stage. Moreover, the real-time simulation method realizes simulation of the MMCbridge arm by adopting an FPGA board card on a Vivado platform, can carry out parallel research and development, and can effectively improve the system design operation rate.

The invention discloses a method for realizing frequency spectrum sensing by using a multi-phase filter. The method is implemented on a field programmable gate array (FPGA) by using a Xilinx / System Generator development tool. According to the method, a multi-phase filtration part and an energy detection part are adopted, wherein the multi-phase filtration part comprises a data type conversion unit, a delay unit, a filter group coefficient address generation unit, a filter group coefficient storage unit, a filter group coefficient analysis unit, a multiplication unit, an addition unit, a clock synchronization unit and a fast Fourier transformation (FFT) unit; the energy detection part comprises the addition unit, the multiplication unit and a mean value acquiring unit; a wireless signal is received and subjected to frequency mixing by an antenna and then converted into I and Q channels of baseband signals; the two channels of baseband signals are sampled by two analog-to-digital converters (ADC) and then converted into digital baseband signals; the digital baseband signals are input into a multi-phase filter group and then filtered under the control of an enabling signal; and the filtered signals are input into the energy detection part and subjected to energy detection, so that the frequency spectrum sensing is realized.

The present invention is an improved arrangement for a wind turbine system wherein the power generator unit is independently installed at ground level to minimize the vertical compressive load imposed on the poles. The wind turbine system is powered by an integrated air power unit comprising an air pump driving an air motor operationally coupled to the power generator at ground level. A lighter weight air pump replacing the old system generator is operationally coupled to the wind turbine rotor blades disposed atop the pole. A pipe line supplies pressurized air from the air pump to the air motor thereby causing the power generator to rotate.

The invention discloses a high-speed real-time simulation method of a two-level rectifier and an inverter. A hybrid logic dynamic model is used for describing an electric traction drive system, so that a logical expression is built for judging the switching function state of the rectifier and the inverter; a state equation and a matrix equation are used for conducting modeling on the rectifier and the inverter respectively; an electric traction drive system discretization calculation implementation block diagram is provided, and concurrent simulation calculation is realized. According to the high-speed real-time simulation method of the two-level rectifier and the inverter, an FGPA chip is used as a simulation calculation unit, a System Generator tool is used for integrating a simulation mathematic model into the FPGA chip, a rectifier simulation model is discretized, and numerical variables in a fixed-point number simulation system are adopted; delay caused by calculation step length is reduced through microsecond real-time simulation, the dynamic property of a simulation system is improved, and simulation precision is improved.

The invention discloses an initiative splitting optimal section searching method for a power system based on a convex optimization theory. The method comprises the following steps: taking the minimal active unbalanced power of the system after splitting as a target function, and then dividing a solution procedure into two stages: in the first stage, adopting an off-line operation for converting the target function and constraint for the system splitting into a series of equation sets meeting a convex optimization condition, and in the second stage, online substituting the power information of a generator and a load and the clustering information of a system generator as parameters into an equation, adopting an interior point method and combining with a branch and bound algorithm for quickly solving. According to the invention, on the basis of consideration for two factors of homologous clustering and minimal unbalanced power of the generator, the online solving for the initiative splitting problem can be quickly online realized.

The invention relates to a method for measuring system voltage and current angles without a voltage transformer. The method is characterized in that when bus voltage is acquired in a power substation and receiving points of voltage angles required by a system are firstly corrected in a unified mode, the time of the whole system (namely sampling points and receiving points) is kept consistent highly, meanwhile zero crossing point moments of voltage waveforms are recorded, the receiving points receive the zero crossing point moments, and the zero crossing point moments are compared with the acquired current waveform zero crossing moments to obtain a time difference value, voltage-current included angles can be converted according to a reduction formula phi = t*360 degrees / T. Voltage and current produced by a power system generator change with sine (standard frequency of a power system in our country f = 50Hz, change occurs for 50 times per second), three-phase current and voltage are symmetric in space and time, the mutual deviation is 120 degrees, one period is 360 degrees according to sinusoidal variation, and each period is shown in description. The problem of power measurement and monitoring of a system which is not provided with the voltage transformer or on which the voltage transformer cannot be installed is solved by adopting the method.

The present invention is an improved arrangement for a wind turbine system wherein the power generator unit is independently installed at ground level to minimize the vertical compressive load imposed on the poles. The wind turbine system is powered by an integrated hydraulic power unit comprising a hydraulic pump driving a hydraulic motor operationally coupled to the power generator at ground level. A lighter weight hydraulic pump replacing the old system generator is operationally coupled to the wind turbine rotor blades disposed atop the pole. An umbilical hose supplies high pressurized fluid from the hydraulic pump to the hydraulic motor thereby causing the power generator to rotate.

A robot model algorithm realization method based on the FPGA is provided, and the serial data are obtained from the upper processor through the DMA IP core of the FPGA. The angle information of three rotary joints of a main manual operation arm is obtained by a serial-to-parallel conversion module, and then is sent to a robot model calculation IP core by an FIFO buffer. The angle information of the three rotary joints of the manual operation arm is obtained by calculation, the serial data are obtained through a parallel-to-serial conversion module, and finally the serial data are returned to the upper process by the DMA IP core. The invention utilizes the System Generator tool to realize the IP core design of the robot model calculation module, and simulates the designed robot model to verify the feasibility of the proposed method. The invention improves the processing speed of the robot model algorithm, meets the requirements for high-precision and high-speed real-time measurement, has the characteristics of low power consumption, miniaturization and high speed, and can be applied to the field of high-precision robot control.

The invention provides a day-ahead power system economical dispatching method which includes the following steps: step S1, modeling a linear programming mathematical model of the day-ahead power system economical dispatching method; step S2, building constraint conditions which enables the power system to satisfy a load balancing constraint, a machine group operating constraint and a contract power constraint, and forming a constraint matrix A by ordering the constraint conditions according to an attribute of variable relating to each constraint condition; step S3, using a predictor-corrector interior point method to get a result which can satisfy the constraint matrix A of an objective function, wherein the objective function of the mathematical model is that T is session number in the period of system dispatching, M is set number of system generators, pi (t) is active power of generator set i in a t period, and Ci [pi (t)] is an operating cost of the generator set i in the t period. The day-ahead power system economical dispatching method uses the predictor-corrector interior point method to solve and the predictor-corrector interior point method is low in an initial point requirement, good in astringency and rapid in astringency speed.