556 results about "Distribution circuits" patented technology

The invention relates to the technical field of power supply or power distribution circuit systems, in particular to a photovoltaic module fault monitoring system and method, and the system comprises an acquisition module, a power supply dynamic compensation module, a control optimization module, a power supply module and a digital twin module. The acquisition module acquires multi-source data through the infrared thermal imaging sensor, the electroluminescent detection unit and the current and voltage characteristic curve acquisition module, the power supply dynamic compensation module dynamically adjusts wavelet basis function parameters based on an improved whale optimization algorithm, and the power supply module fuses hot spot distribution, current and voltage abnormity and aging trend data. And driving the dynamic adjustment of the protection threshold. And the digital twin module synchronizes real and virtual system data through transfer learning, rehearses a fault path to generate a maintenance instruction and feeds back the maintenance instruction to an optimization prediction model, so that a monitoring, protection and self-optimization closed-loop system is formed, and the fault diagnosis precision and the system reliability in a complex environment are improved.

Various embodiments include a wireless communication network that comprises resource allocation circuitry. The resource allocation circuitry hosts a traffic forecasting machine learning model, a resource forecasting machine learning model, and a resource allocation machine learning model. The resource allocation circuitry obtains traffic data for a provisioning engine cluster and provides the traffic data to the traffic forecasting model. The resource allocation circuitry obtains an output that comprises a traffic prediction for the provisioning engine cluster and provides the prediction to the resource forecasting model. The resource allocation circuitry obtains an output that comprises a hardware requirement prediction for the provisioning engine cluster and provides the hardware requirement prediction to the resource allocation model. The resource allocation circuitry obtains an output that comprises a hardware allocation recommendation for the network provisioning engine cluster. The resource allocation circuitry allocates hardware resources to the cluster based on the hardware allocation recommendation.

The invention relates to the technical field of illumination design, and discloses a transformer substation indoor illumination design method, system and device and a storage medium, and the method comprises the steps: obtaining real-time data, spatial feature data and meteorological data of a transformer substation, inputting the data into an illumination prediction model, and obtaining the illumination demand value of each region of the transformer substation; inputting the illumination demand value and the environmental parameters into a lamp selection model to obtain a lamp layout initial scheme; establishing a three-dimensional simulation model of the transformer substation according to the transformer substation design drawing and the lamp layout initial scheme, and performing iterative simulation to obtain a lamp layout optimization scheme; performing clustering analysis on the lamp layout optimization scheme by adopting a clustering algorithm to obtain a plurality of lamp groups, and setting an independent power distribution loop for each lamp group; and generating a control strategy corresponding to each lamp group according to the illumination demand value. According to the invention, the design precision, the energy efficiency level and the operation and maintenance convenience of the lighting system are remarkably improved by fusing dynamic prediction, multi-objective optimization and intelligent control technologies.

The invention provides an adjustable power distribution circuit capable of realizing any polarization mode, the adjustable power distribution circuit is positioned between a radio frequency circuit and at least one antenna assembly, the adjustable power distribution circuit comprises an input signal part, at least two signal control parts, a processing unit and at least one orthogonal coupling circuit, the input signal part can convert a radio frequency signal from the radio frequency circuit into a plurality of corresponding input signals and transmit the input signals to each signal control part, each signal control part can convert the input signals into corresponding control signals according to a processing instruction of the processing unit and then transmit the control signals to the orthogonal coupling circuit, and the orthogonal coupling circuit transmits the control signals to the radio frequency circuit. And the orthogonal coupling circuit generates two output signals with a phase difference of 90 degrees, and transmits the output signals to the antenna assembly. Therefore, the adjustable power distribution circuit can enable the antenna assembly to form a linear polarization mode, a circular polarization mode or an elliptical polarization mode in any direction according to actual requirements of products.

The invention relates to the technical field of power distribution automation auxiliary power supply control, and discloses an intelligent power distribution circuit system for a digital ring main unit, which comprises a transient voltage gradient induction bridge circuit, a hardware signal processing circuit, a power switch unit and a controlled energy release unit, according to the system, a transient voltage gradient induction bridge circuit is used for collecting a primary side bus voltage change rate signal, a hardware signal processing circuit carries out derivation operation on an induction signal and compares the induction signal with a voltage gradient threshold value, and a power switch unit is blocked at the moment that the voltage abnormally drops so as to cut off a load current path. According to the invention, a hardware parameter direct mapping mechanism is utilized to realize microsecond transient protection response, and the physical decoupling of protection logic and digital software is realized by balancing bus potential pulse caused by sudden unloading of a load through the inherent dehumidification resistor in the multiplexing cabinet.

The utility model relates to a display device which comprises a display panel, a distribution circuit, a backlight assembly and a controller, the backlight assembly is located on the side away from a display face of the display panel, and the distribution circuit comprises at least one data transmission path which is correspondingly connected with at least one driving set of the backlight assembly. The controller is configured to output backlight driving data to the distribution circuit so as to transmit the received backlight driving data to the connected driving group through a data transmission path of the distribution circuit, so that the driving group drives the connected light-emitting component to provide backlight; the controller is further configured to output the display data to the display panel such that the display panel displays a picture. Compared with a complex circuit structure of a backlight controller, normal backlight display of the display equipment can be guaranteed through the controller with enough strong operational capability and the distribution circuit with lower cost, the circuit structure is simplified, meanwhile, the backlight controller with higher cost does not need to be applied, the cost is reduced, and the application range of the display equipment is widened.

A bandgap reference voltage generating circuit includes a bandgap cell, a tail resistor circuit, a high-order curvature compensation current generating circuit, an IZTAT current sink circuit, and a start-up circuit. The bandgap cell has a base current redistribution circuit that drives the bases of the bipolar transistors using a first base resupply current taken from the first current leg of the cell, and that uses a matched second base resupply current taken from the second current leg of the cell. VBG error due to bipolar current gain variation is reduced. The N-channel transistors of the curvature compensation current generating circuit operate in the near threshold region. The output current of the compensation circuit varies as power of approximately 2.1 of the input current. The tail resistor circuit is programmable in various ways so that the amount of curvature correction can be tailored and trimmed.

The invention relates to the technical field of vehicles, in particular to a dual-redundancy power supply management system and method, and the system comprises an intelligent power distribution unit which is integrated with a first-stage power distribution circuit and a second-stage power distribution circuit; a plurality of MOS (Metal Oxide Semiconductor) tubes are arranged in the primary power distribution circuit and are used for executing corresponding switching operations according to different power failure modes; the secondary power supply distribution circuit comprises a plurality of high-side driving units and is used for providing controlled power supply output for a load, and the high-side driving units have the functions of current detection, temperature detection and fault protection; and the control unit is used for controlling the on-off states of the MOS tube and the high-side driving unit and realizing feedback and remote control of fault information through a bus. Therefore, the problems of low integration level, limited functions, insufficient safety, difficulty in meeting high-order intelligent driving requirements and the like of a vehicle power supply management scheme in related technologies are solved.

The invention discloses a port bandwidth allocation circuit and method for PCIe equipment, the circuit comprises at least one CPU and a plurality of corresponding ports, the ports are inserted into the PCIe equipment through a socket circuit, the port bandwidth allocation circuit further comprises connectors connected with the ports, when the socket circuit of each port is inserted into the first PCIe equipment or the second PCIe equipment, different levels are output at the in-place detection end, and when the first PCIe equipment or the second PCIe equipment is inserted into the second PCIe equipment, different levels are output at the in-place detection end. When the second PCIe equipment with different bandwidth allocation modes is inserted, different voltage division circuits are formed, and the equipment detection signal end outputs different level voltages; the connector is used for detecting an in-place detection signal and an equipment detection signal and sending the signals to the CPU; and the CPU allocates the port bandwidth of the PCIe equipment according to the in-place detection signal and the equipment detection signal of each port. Therefore, the problem that IO resources are wasted by adopting dynamic bandwidth allocation or a fixed bandwidth allocation mode is not flexible in the prior art is solved.

The invention relates to an arc discharge detection circuit, in particular to an arc discharge current detection circuit for comparison based on a current sensor. The circuit comprises a signal acquisition circuit, a transmission medium and a signal comparison circuit. The signal acquisition circuit comprises an arc discharge signal acquisition circuit and a signal filter circuit. According to the invention, the current collected by the two current transformers on one wire is compared and processed to obtain the size of the arc discharge current or the comparison signal of the current to judge whether the conductor is arced or not, so that the method is particularly suitable for being used in a power distribution loop of a power supply and distribution system, and even under the conditions of large load and load diversity, the arc discharge of the conductor is avoided. According to the utility model, the arc discharge condition between the conductor wires and between the wire and the ground can be rapidly and accurately detected, and the false alarm condition caused by the detection error can be further avoided by setting the mode that the number of times of outputting the arc discharge fault current signal in unit time reaches the set number of times and then outputting the alarm signal by the automatic counting alarm circuit.

The invention relates to the technical field of power electronics, and discloses a wall-mounted power supply and an intelligent monitoring system thereof, and the system comprises a cabinet body which is internally divided into a top AC input region, a middle region and a bottom battery output region; according to the two-way alternating current input circuit, an alternating current input 1 and an alternating current input 2 are respectively connected to a contactor through a circuit breaker to realize switching of a main power supply and a standby power supply through interlocking logic; the rectification and conversion circuit is used for converting AC input into DC48V through a rectification module to charge the lithium iron phosphate battery pack, and outputting the DC 48V to a DC bus through a boost module; an output power distribution circuit, wherein the DC bus is distributed to a plurality of load output circuits through a fuse; and a monitoring unit interface. Seamless switching of two-way alternating current input is achieved through mechanical and electrical interlocking design, zero-delay switching power supply of a main power supply and a standby power supply is ensured, the state of a battery is monitored in real time, a charging and discharging strategy is dynamically optimized, multiple protection mechanisms are integrated, power supply continuity is remarkably improved, the service life of the battery is prolonged, and stable operation requirements under complex working conditions are met.

The invention belongs to the technical field of circuit devices or systems for power supply or power distribution, and provides an energy storage coordination control method, a coordination controller and an energy storage coordination control system.The working condition of an energy storage system is judged according to an input signal, the total power fluctuation amplitude of an energy storage converter, the power grid voltage fluctuation amplitude and a power grid frequency error; the sampling frequency of analog-to-digital conversion in the direct-current small signal acquisition module and the alternating-current analog quantity acquisition module is switched according to the working condition, so that'dynamic sampling frequency adjustment based on the working condition 'can be realized, the compatibility of sampling at the frequency of more than 100KHz can be kept, the power consumption can be reduced in a steady state, the fault identification precision can be improved in a transient state, and the fault identification efficiency can be improved. The balance between the sampling efficiency and processor resource occupation is considered, and the operation requirement of a high-capacity energy storage system is met.

The invention discloses a high-side driving circuit, an electronic device, a vehicle and a control method. False triggering of a short-circuit protection mechanism is avoided. The high-side driving circuit comprises a power distribution circuit, a sampling circuit and a fault protection circuit, the power distribution circuit comprises a PMOS transistor and a first resistance circuit; the grid electrode of the PMOS tube is grounded through the first resistance circuit, the drain electrode of the PMOS tube is connected with a load, and the source electrode of the PMOS tube and the input end of the fault protection circuit are connected with a power supply; the output end of the fault protection circuit is connected with the grid electrode of the PMOS tube; the sampling circuit is connected with the drain electrode of the PMOS tube and the ground; the output end of the sampling circuit and the control end of the fault protection circuit are connected to the control unit; the control unit judges whether load short circuit occurs or not according to the sampling voltage, if not, the fault protection circuit is forbidden to output voltage, and if yes, the fault protection circuit is controlled to convert input voltage into target voltage to be output; the PMOS tube is in a variable resistance region when the fault protection circuit has no voltage output, and enters a cut-off region when the PMOS tube outputs a target voltage.

The invention discloses an electrically-operated drop-out fuse and a control method, and relates to the field of circuit devices for power supply or distribution, the electrically-operated drop-out fuse comprises a protective insulator, an intelligent control module, a drop-out assembly, a driving mechanism and a transmission mechanism, the protective insulator is of a longitudinally-penetrating groove structure, the top of the protective insulator is provided with a closed upper cover, and the intelligent control module is connected with the drop-out assembly; two sides of the protective insulator extend downwards to form side walls, the side walls and the insulator form a shield used for shielding the upper static contact and the upper moving contact, a closed cavity is arranged at the rear part of the protective insulator, and a driving mechanism is arranged in the cavity; the intelligent control module is electrically connected with the driving mechanism, the driving mechanism is connected with the transmission mechanism, and the intelligent control module controls the driving mechanism to drive the falling assembly through the transmission mechanism to realize opening or closing; according to the fuse and the control method provided by the invention, remote intelligent switch-on and switch-off can be realized, the operation is safe and reliable, the structure is compact, and the protection performance is excellent.

The present disclosure relates to a high-voltage distribution circuit and a charging control method to reduce heat generation. The high-voltage distribution circuit provides practical effects such as forming a water cooling structure simply and compactly by applying a DC inlet and a water cooling circuit together in a housing, and improving cooling efficiency and charging efficiency of fast charging at the same time.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

The invention discloses a monitoring terminal for a power distribution cabinet, and the terminal comprises an environment monitoring module which is used for the information collection of access control, water immersion, smoke sensing and gas in a power distribution room; the power distribution cabinet monitoring module is used for monitoring operation parameters, overvoltage, undervoltage, current, power and operation state of a power distribution loop; and the video monitoring module is used for real-time monitoring in the power distribution room. Through cooperative operation of the environment monitoring module, the power distribution cabinet monitoring module and the fault alarm module, breakthrough improvement of safety protection and operation and maintenance efficiency of the power distribution system is realized, and when environmental parameters are abnormal, the system is linked with video monitoring focusing and executes power cut-off / ventilation operation in an extremely short time, so that the rate of environment-related accidents is reduced, and the safety of the power distribution system is improved. And the circuit breaker health degree analysis module constructs an Hcb quantitative model based on parameters such as contact wear rate and operation times, so that the prediction accuracy is improved, the replacement period of the circuit breaker is prolonged, and the cost of spare parts is reduced.

The invention relates to the technical field of power supply or power distribution circuit devices of power systems, and discloses a power distribution loop self-reset state control system based on thermal parameter feedback, which comprises a thermal parameter acquisition module used for acquiring a physical heat dissipation temperature sequence of a power supply node after tripping; the historical load mapping module is used for calculating a closing transient temperature rise estimated value according to the load characteristic data within 24 hours before tripping and generating a dynamic correction value of a heat dissipation slope judgment boundary; the logic arbitration module is used for calculating the deviation degree of the heat dissipation slope of the double-window sampling sequence and judging whether the deviation degree is converged into a heat dissipation slope judgment boundary updated according to the dynamic correction amount or not; according to the invention, through a closed loop arbitration mechanism of a heat dissipation characteristic slope, a physical heat dissipation steady state inflection point is identified, a maloperation risk caused by environment thermal resistance drift and closing inrush current impact is eliminated, and power supply continuity is guaranteed.

The utility model discloses a power supply control distribution circuit and electronic equipment, which are applied to the field of power supply distribution control. The system comprises a power supply control board and at least one power supply distribution board. The first input end of the power distribution board is connected with the first output end of the corresponding switching power supply, the second input end of the power distribution board is connected with the output end of the power control board, and the first output end of the power distribution board is connected with the first end of the corresponding load; the first input end of the power supply control board is connected with the second output end of any power supply distribution board, and the second input end of the power supply control board is connected with the second output end of the switching power supply and the second end of the load; the input end of the switching power supply is connected with the commercial power port. According to the invention, through the power supply control board and the power supply distribution board, each load is powered on in sequence, thereby reducing the damage of surge to circuit devices and prolonging the service life of an instrument; meanwhile, the load and the switching power supply voltage are detected, the fault rate of the system is reduced on the whole, and the reliability of the system is improved.

The invention relates to the technical field of power system monitoring and anomaly analysis, and discloses a museum power distribution loop abnormal power consumption mode identification method and system. The method comprises the following steps: acquiring millisecond-level current and voltage original waveforms of each level of power distribution loop of a museum, and extracting a time sequence current sequence containing harmonic distortion rate mutation and leakage current high-frequency pulses; performing exhibition area portrait classification based on the sequence, and determining dominant load type labels of each loop; fusing the load label and the time sequence, and predicting a normal current track of each loop; collecting a latest current waveform in real time, comparing the latest current waveform with the predicted trajectory, and identifying and marking a potential abnormal loop; abnormal source equipment combination judgment and abnormal millisecond-level evolution characteristic analysis are carried out on the abnormal loop; and judging whether to trigger instant early warning or not according to the abnormal evolution characteristics and the equipment combination type. According to the invention, accurate identification and source positioning of abnormal power utilization of the distribution loop of the museum are realized, the false alarm rate is reduced, and the timeliness and reliability of abnormal response are improved.

The utility model relates to roadbed monitoring equipment integrating multiple sensors, which comprises a power supply, a temperature and humidity sensor, a settlement detector and a data acquisition device, and the power supply input end of the data acquisition device is connected to the power supply and is respectively connected with the temperature and humidity sensor and the settlement detector. The data acquisition device comprises a power supply distribution circuit, a microprocessor, a Cat1 modem and an RS485 communication module, the input end of the power supply distribution circuit is connected to a power supply, the output end of the power supply distribution circuit is connected to the microprocessor, the Cat1 modem and the RS485 communication module, the microprocessor is connected with the Cat1 modem, the Cat1 modem is connected with the RS485 communication module, and the RS485 communication module is connected with the microprocessor. The RS485 communication module is respectively connected with the temperature and humidity sensor and the settlement detector. Compared with the prior art, the utility model has the advantages of good durability, abundant data and the like.

The present disclosure provides a single-inductor multiple-output voltage converter, a power supply chip, and an electronic device, where the single-inductor multiple-output voltage converter comprises an energy generation circuit, an energy distribution circuit, a peak-inductor-current detection circuit, a zero-inductor-current detection circuit, and a control logic circuit. The aforementioned converter can provide multiple different output voltages using a single inductor without multiple operational amplifiers, thereby avoiding excessive bandwidth demand associated with multiple operational amplifiers, thus reducing power consumption.

An integrated triggering system for a pulsed-power driver is presented. The triggering system includes a pulse distribution circuit that couples externally generated trigger pulses to midplanes of a limited number of stages of the pulsed-power driver. The pulse distribution circuit includes common midplane nodes, each coupled to a group of midplanes of a same stage via respective isolating inductors. Isolating elements are coupled between the common midplane nodes of a same stage. The triggering system further includes a protection circuit configured to reduce coupling of high voltages triggered at the midplanes to external circuits while allowing the trigger pulses to couple to the midplanes. The protection circuit includes a high pass filter comprising a capacitor. The triggering system further includes a midplane biasing circuit configured to provide a reference ground to the midplanes of all stages. The midplane biasing circuit includes a resistive ladder with nodes coupled to the midplanes.

The embodiment of the invention relates to the technical field of energy planning, and discloses a hydrogenation network distribution planning method and device based on multi-source data, and a storage medium, and the method comprises the steps: firstly obtaining a preliminarily planned hydrogenation network route (i.e., an initial hydrogenation station topological map), obtaining a plurality of initial candidate hydrogenation station addresses through spatial mapping; adjusting the initial candidate address according to a multi-source data set of industry, traffic, environment, economy, safety and the like to obtain a target candidate address, and screening out a target hydrogenation site address according to preset conditions including rigid (such as distance limitation with a peripheral sensitive area) and flexible (such as single-station service radius limitation) constraints; and finally, generating a hydrogenation network distribution circuit diagram based on the target addresses. Therefore, according to the technical scheme of the invention, multiple factors can be comprehensively considered, so that the site selection of the hydrogenation sites is more scientific and reasonable, the accurate matching of hydrogen energy supply and terminal requirements can be realized, and the efficiency of hydrogenation network distribution planning can be improved.

The invention relates to a storage calculation device supporting sparse matrix calculation, which comprises a storage core particle, a logic core particle, a multiply-accumulate circuit, a characteristic value distribution circuit and a sparse matrix decomposition circuit, and is characterized in that the storage core particle is used for storing a sparse weight matrix, and the logic core particle is used for data interaction, caching and control; the multiply-accumulate circuit executes multiply-accumulate operation of characteristic values and weights, the sparse matrix decomposition circuit screens out position codes of front # MAC non-zero weights in each operation period and outputs control signals, and the characteristic value distribution circuit dynamically maps input characteristic values to corresponding non-zero weights according to the control signals, so that calculation of an arbitrarily distributed sparse matrix is realized. The method has the advantages that multiply-accumulate operation is performed on the non-zero weight, the zero weight is skipped, power consumption is reduced, calculation efficiency is improved, and efficient processing of the sparse matrix is achieved through a storage and calculation integrated framework.

A low-voltage integrated power distribution architecture and a vehicle. The low-voltage integrated power distribution architecture comprises a high-voltage input end (110), a DCDC circuit (200), a low-voltage management circuit (400), a low-voltage power distribution circuit (300), and a low-voltage battery (500); the low-voltage power distribution circuit (300) is provided with a low-voltage power supply end (120) for connection to a low-voltage load; one end of the low-voltage power distribution circuit (300) is connected to the low-voltage battery (500) by means of the low-voltage management circuit (400); and the other end of the low-voltage power distribution circuit (300) is connected to a high-voltage input end (110) by means of the DCDC circuit (200). By integrating the DCDC circuit (200), the low-voltage management circuit (400), the low-voltage power distribution circuit (300), and the low-voltage battery (500) together and reusing a same controller (600), the function of managing the low-voltage management circuit (400), the low-voltage power distribution circuit (300), and the DCDC circuit (200) is integrated in the controller (600). The weight and size of the power distribution architecture are reduced, and the probability of parasitic inductance or parasitic capacitance between the DCDC circuit (200) and the low-voltage battery (500) causing damage to circuits in the vehicle is reduced.

According to the control on-chip low dropout linear regulator and off-chip triode current distribution circuit provided by the embodiment of the invention, two signals output by a common end between a drain electrode of a first NMOS (N-channel Metal Oxide Semiconductor) tube and a first current source and a common end between a drain electrode of a second NMOS tube and a second current source are utilized; the logic of the digital control unit is controlled, and the purpose of distributing current between the interior of the low-voltage linear voltage regulator and the triodes according to a design value is achieved.

A power distribution circuit for an electrically powered aircraft includes a plurality of batteries and a plurality of electric propulsion systems. A plurality of power distribution circuits each couple a battery of the plurality of batteries to two or more electric propulsion systems. The plurality of electric propulsion systems are positioned on the aircraft to apply balanced forces to the aircraft such that in the event of a failure, the aircraft remains stable and only experiences a loss in altitude or speed.

This electronic device comprises: a wireless communication circuit; a distribution circuit connected to the wireless communication circuit; a frame defining at least a portion of a side surface of the electronic device, wherein the frame includes a conductive portion having a first feed point and a second feed point electrically connected to the distribution circuit; and a phase shifting circuit for connecting the distribution circuit to the first feed point of the conductive portion. The conductive portion includes a first portion between the first feed point and the second feed point, a second portion between the first feed point and one end of the conductive portion, the first feed point being distinguished from a ground of the electronic device, and a third portion between the second feed point and the other end of the conductive portion, the second feed point being distinguished from the ground of the electronic device. The conductive portion is configured to function as a radiator of an antenna through the first portion of the conductive portion, the second portion of the conductive portion, and the third portion of the conductive portion.

Disclosed techniques relate to power management by work distribution circuitry. In some embodiments, a graphics processor includes first and second graphics processor sub-units that respectively include distributed work queue circuitry configured to store graphics work and shader circuitry configured to execute instructions specified by stored graphics work in the sub-unit's distributed work queue circuitry. In some embodiments, work control circuitry includes queue access circuitry to access graphics work in multiple queues and distribution circuitry to assign portions of respective sets of graphics work accessed from the multiple queues to the first and second graphics processor sub-units for execution. In some embodiments, tracking circuitry tracks status of assigned sets of graphics work. In some embodiments, the work control circuitry communicates with the power control circuitry to control power state of portions of the graphics processor based on: status of multiple queues and status of assigned sets of graphics work tracked by the tracking circuitry.