371 results about "Voltage compensation" patented technology

The invention discloses a flexible control method and system for a bidirectional charging pile, and the method comprises the steps: collecting a physical port voltage and a loop current, calculating a voltage compensation amount through combining with an impedance compensation parameter, and generating a virtual feedback voltage for a voltage control loop; according to the working mode (charging / discharging) of the charging pile and the comparison result of the physical port voltage and the corresponding cut-off voltage threshold value, whether the system is in a safe area or a touch boundary is judged. In the safe area, the first type of correction is adopted to maintain the positive response characteristic; and when the boundary is touched, the second type of correction is adopted to limit the output and ensure that the port voltage does not exceed the preset threshold range. The method is used for improving the stability of the effective response duration and the adjustment precision when the bidirectional charging pile participates in the high-frequency power grid auxiliary service.

The invention relates to the technical field of motor control, and discloses a voltage compensation stable management system for a vortex oscillator motor, and the system comprises a detection unit which is used for collecting a bus current signal; the processing unit is used for performing differential operation on the bus current signal to determine a current change rate, judging that a load sudden change working condition is entered when the current change rate exceeds a preset threshold value, and further querying a load response coefficient according to a preset feature table and calculating a voltage compensation increment; and the driving unit is used for adjusting the phase shift angle of the excitation voltage according to the voltage compensation increment. According to the invention, by identifying the load working condition in real time and executing feedforward compensation, the instantaneous voltage drop caused by load switching is eliminated, the voltage steady-state characteristic of a motor driving link is maintained, the rotation speed fluctuation is effectively inhibited, and the dynamic response capability of the system under the variable load working condition is enhanced.

The invention relates to the technical field of micro-grid control, and provides an island micro-grid distributed control method, system and device and a storage medium. Comprising the following steps: performing voltage compensation gain and frequency compensation gain calculation based on droop control output of each distributed power generation unit, droop control output of all neighbor distributed power generation units, and a voltage dynamic tracking error and a frequency dynamic tracking error which are obtained by calculating a microgrid global recovery target to obtain secondary adjustment output; and after corresponding items in the droop control output and the secondary regulation output are summed to generate comprehensive reference output, voltage synthesis is carried out according to the comprehensive reference output to obtain voltage regulation output for output control of a corresponding inverter. Based on a distributed regulation and control mechanism for cooperatively calculating the compensation amount of each power generation unit by using neighbor information and a global recovery target, the dynamic response speed and the power distribution precision can be improved, voltage drop and frequency deviation caused by load disturbance are effectively eliminated, and rapid recovery is realized.

The invention belongs to the technical field of battery state detection, and discloses a lead-acid battery health assessment method and system based on simulated working conditions. Comprising the steps of collecting lead-acid battery simulation operation data and performing data cleaning to obtain high-quality battery data; screening recovery effect data and removing the recovery effect data from the high-quality battery data to obtain disturbance-removed battery data; performing polarization voltage compensation to generate voltage compensation battery data; abnormal impact identification is executed, abnormal data filtering is carried out on the voltage compensation battery data based on an identification result, and reasonable battery data is output; identifying long-period data and performing risk judgment to obtain corrected battery data and cover corresponding data in the reasonable battery data to obtain differentiated battery data; performing health state evaluation on the differentiated battery data, and outputting health indexes of the lead-acid battery; and the evaluation accuracy of the real health level of the battery under the simulated working condition is remarkably improved.

The invention discloses a battery charging and discharging power self-regulation control circuit, which relates to the technical field of battery control, and comprises a power supply module, a micro-control module, a voltage sampling and comparison module, a battery charging and discharging power self-regulation control module, a battery charging and discharging power self-regulation control module, a battery charging and discharging power self-regulation control module and a battery charging and discharging power self-regulation control module, the power regulation module compensates the direct-current electric energy, the battery module stores energy, the power regulation module and the direct-current electric energy are superposed and supply power to the battery module, during the discharging period, according to the voltage comparison condition, the power regulation module carries out voltage compensation processing on the battery module, and the battery module directly supplies power to the discharging module; and the power regulation module performs voltage balance control on the battery module. The battery charging and discharging power self-adjusting control circuit can prolong the service life of the battery, improve the charging and discharging efficiency, reduce the electric energy loss of the power adjusting module, improve the energy utilization rate and provide higher charging voltage.

The invention relates to a terminal voltage flexible regulation and control method, and the method comprises the following steps: presetting target voltage parameters which comprise an amplitude value, a frequency and an initial phase angle; calculating a three-phase sinusoidal voltage reference signal based on a virtual synchronous machine algorithm according to the target voltage parameter; according to the three-phase sinusoidal voltage reference signal, generating a driving signal by using pulse width modulation, and controlling the on and off of an IGBT power switch device to generate a three-phase sinusoidal compensation voltage; injecting the three-phase sine compensation voltage into the tail end of a power grid; monitoring the voltage state of the power grid in real time, and calculating the deviation between the actual voltage of the tail end of the power grid and the target voltage parameter; and according to the deviation, adjusting a control parameter in the virtual synchronous machine algorithm, and updating the three-phase sine compensation voltage to compensate the voltage deviation at the tail end of the power distribution network. Voltage deviation can be compensated in time, and the problem of voltage change caused by large fluctuation of electrical load can be effectively solved.

The invention discloses a VSG deadbeat prediction control method based on impedance identification adaptive compensation, and the method comprises the following steps: collecting the grid-connected point voltage and current of a three-phase grid-connected converter, and converting the voltage and current into corresponding components in a rotating coordinate system; and identifying a power grid impedance parameter based on the component, calculating a system short-circuit ratio, comparing the system short-circuit ratio with a preset threshold value, and selecting a standard predictive control or impedance adaptive compensation mode. In a standard mode, a virtual synchronous generator discretization mathematical model considering system delay is constructed, and first control voltage is generated through dead-beat predictive current control; and in the compensation mode, self-adaptive compensation of a power grid impedance parameter is introduced on the basis of the first control voltage, a final control voltage is obtained, a PWM driving signal is generated according to the final control voltage, and grid-connected operation of the converter is controlled. According to the method, dead-beat predictive current control and a virtual synchronous generator technology are combined, a power grid impedance identification and self-adaptive compensation mechanism is added, and self-adaptive high-performance control of the converter under strong and weak power grid conditions is realized.

The invention relates to the technical field of transformer intelligent optimization compensation, in particular to an electric energy quality compensation method and equipment for new energy access to a power grid, and the method comprises the steps: connecting a dynamic voltage compensation converter in series at the low-voltage side of a transformer, and connecting a high-power bidirectional converter in parallel at the load side of a terminal, acquiring the voltage of the low-voltage side of the transformer at each moment in each period, and recording the voltage as transformer voltage; acquiring load current and load voltage at each moment in each period of the load side of the terminal; determining the influence weight of harmonic disturbance, the influence weight of reactive power disturbance and the influence weight of voltage out-of-limit in each period; constructing a target function; and obtaining an optimal power factor, each harmonic current component and each transformer voltage in the current period by utilizing an intelligent optimization algorithm and combining the objective function, and respectively performing transformer voltage compensation, reactive compensation and harmonic current compensation on the current period. Therefore, the overall stability of electric energy quality is improved.

The invention belongs to the technical field of display driving, and particularly relates to a noise reduction circuit, a gate driving circuit, a voltage compensation method and a display panel, and the noise reduction circuit comprises a first compensation unit which is used for responding to a first compensation control signal output by an external control device and outputting a corresponding first compensation voltage; the noise reduction control unit is used for controlling the voltage on the noise reduction control node to meet a preset reference range under the action of the first compensation voltage; the noise reduction execution unit is configured to respond to the voltage on the noise reduction control node and execute noise reduction processing on at least one node subjected to noise reduction; the detection unit is used for detecting the actual voltage on the noise reduction control node; through a closed-loop control mechanism of real-time detection and dynamic compensation, attenuation of the voltage of the noise reduction control node is actively counteracted, the problem of unstable noise reduction caused by threshold voltage drift of the control transistor is improved, and the noise reduction stability of the noise reduction circuit in long-term work is remarkably improved.

The invention relates to the technical field of power electronics and electric energy quality management, in particular to a TNPC-UPQC multi-target finite set prediction control method and system based on midpoint potential self-balancing, and the method comprises the steps: building a parallel side current prediction model based on a KVL equation, and building a series side voltage prediction model based on a voltage compensation relation; constructing a direct-current side total voltage prediction model based on a power balance principle, and constructing a neutral-point potential prediction model by accurately calculating a neutral-point current; the method comprises the following steps: constructing a model multi-objective cost function, determining cost function values corresponding to various switching states of the converter by adopting the multi-objective cost function, selecting an optimal switching state which enables the cost function to be minimum, applying the optimal switching state to the converter, and directly controlling the on and off of a corresponding power switching device. In order to dynamically coordinate the priority of each target under different working conditions, a self-adaptive inertia weight adjustment algorithm is introduced, and the algorithm can effectively balance the global search capability and the local search capability.

The invention relates to a direct-hanging type energy storage inverter power module SOC equalization control method and hardware suitable for an unbalanced output current working condition, and the method comprises the steps: carrying out the state sensing of a power grid, carrying out the positive and negative sequence separation based on a double-dq coordinate system, and obtaining the amplitude and phase information of current and voltage components; generating a three-phase basic voltage reference value meeting the power demand of the power grid based on the deviation between the decoupled current component and the current instruction; according to the unbalanced working condition parameters of the power grid and the charge state difference of each phase of battery, the zero-sequence voltage injection amount required by inter-phase equalization is calculated; calculating the voltage compensation amount of each power module according to the charge state difference of each power module in the same phase; synthesizing the three-phase basic voltage reference value, the zero-sequence voltage injection quantity and the voltage compensation quantity of each power module to generate a modulation signal of each power module; a switch control signal is generated through pulse width modulation, and inter-phase and intra-phase adaptive SOC equalization control is realized; hardware is implemented based on the method.

The invention discloses a method and a system for estimating direct-current bus current of an electric vehicle. The method comprises the following steps: acquiring a d-axis voltage instruction, a d-axis current, a q-axis voltage instruction and a q-axis current of a motor side; compensating the d-axis voltage instruction and the q-axis voltage instruction based on parameters including voltage delay time to obtain a compensated voltage value; calculating the electromagnetic power of the motor based on the compensated voltage and current; the loss power of hardware in the motor controller is obtained, and the direct current side power is calculated in combination with the electromagnetic power; and calculating a direct current bus current estimation value based on the direct current bus voltage and the direct current side power. According to the method, processing is carried out under the dq coordinate system, the operation requirement of the controller is reduced, the power calculation error is corrected through voltage compensation and system loss compensation, high-precision and low-cost direct current bus current estimation is achieved under the condition that an additional hardware sensor is not needed, and the control precision and reliability of an electric drive system are improved.

The invention provides an impedance identification method and system for a series dynamic voltage compensation device, and the method comprises the steps: monitoring the voltage data and current data of a power grid side in real time, and calculating the voltage change rate; judging whether the voltage change rate meets a preset disturbance event triggering condition or not, and if yes, generating a candidate disturbance event; s3, acquiring an operation state signal of the dynamic voltage compensation device, judging whether the dynamic voltage compensation device is in a non-compensation state or not according to the operation state signal, and if the dynamic voltage compensation device is judged to be in the non-compensation state, entering step S3; calculating an active power change rate based on the voltage data and the current data; if the active power change rate is negative, determining that the source of the candidate disturbance event is a power grid side; and if it is judged that the candidate disturbance event comes from the power grid side, calculating and outputting the system impedance of the power grid side based on the voltage data and the current data of the power grid side during the candidate disturbance event.

The invention relates to the technical field of electrical detection, in particular to a multi-stress coupling environment reliability testing method for an electricity consumption information acquisition terminal. Comprising the steps of applying a combined stress field to an electricity utilization information acquisition terminal through an environment test box; acquiring power utilization information acquisition terminal parameters; the method comprises the following steps of: capturing metering pulse response and carrier communication interaction signals of an electricity utilization information acquisition terminal under the excitation of a combined stress field by utilizing an electrical sensor, extracting carrier signal-to-noise ratio data and metering reference drift data, and generating a reference voltage compensation coefficient and an impedance matching threshold value; projecting the carrier signal-to-noise ratio data to an impedance matching threshold value, and constructing a stress failure envelope surface according to a hardware overload protection threshold value; and mapping the communication quality distortion residual vector to a stress failure envelope surface, and calculating a reliability life prediction value. According to the method, a uniform excitation environment is constructed, and performance degradation of different dimensions is uniformly quantified into accumulative stress damage integral, so that the comprehensive anti-interference capability of the terminal in a multi-stress coupling environment can be truly reflected.

The invention provides an engine VVT clamping stagnation processing method and system, and the method comprises the steps: obtaining the static characteristics and dynamic response characteristics of an engine during operation, detecting the operation state of the engine VVT, and judging whether the VVT clamping stagnation exists or not; if VVT clamping stagnation does not exist, according to the set period, the oscillation amplitude and the oscillation frequency, a battery valve is driven to enable a VVT actuator to do reciprocating motion within the stroke range; if VVT clamping stagnation exists, a corresponding voltage compensation coefficient is obtained according to the real-time storage battery voltage, and oscillation is performed by adopting a strong oscillation mode or a limit position recovery mode based on the voltage compensation coefficient; and detecting the triggering times of oscillation, judging whether the VVT clamping stagnation is solved or not when the triggering times reach a triggering times threshold value, if so, entering PID control, and if not, judging that the VVT has a fault. By means of the method, VVT clamping stagnation can be prevented and repaired in the early stage, and the VVT fault rate and engine performance fluctuation are reduced.

The invention belongs to the technical field of display driving, and particularly relates to a noise reduction circuit, a gate driving circuit, a voltage compensation method and a display panel, and the noise reduction circuit comprises a coupling unit which is used for achieving the voltage coupling of a noise reduction control node and a noise reduction coupling node; the detection unit is used for detecting an actual voltage on the noise reduction coupling node, so that the external control device outputs a dynamic first compensation control signal according to a comparison result of the actual voltage and the preset reference range; the first compensation unit is used for responding to a first compensation control signal output by the external control device and outputting a corresponding first compensation voltage to the noise reduction coupling node; through real-time detection and a dynamic compensation mechanism, the attenuation of the voltage of the noise reduction control node is actively counteracted, the problem of unstable noise reduction caused by threshold voltage drift of the control transistor is improved, and the noise reduction stability of the noise reduction circuit under long-term work is remarkably improved.

The invention discloses a voltage compensation method, a voltage compensation circuit and electronic equipment. The voltage compensation method comprises the following steps: acquiring bus voltage in a power switch circuit and energy storage current in an energy storage compensation circuit; obtaining a bus amplitude limiting voltage target value by using the bus voltage target value and the bias adjustment value, and subtracting the bus voltage from the bus amplitude limiting voltage target value to obtain a bus amplitude limiting voltage error value; performing proportional integral operation and amplitude limiting processing on the bus amplitude limiting voltage error value to obtain an energy storage current target value, and subtracting the energy storage current from the energy storage current target value to obtain an energy storage current error value; performing proportional integral operation on the energy storage current error value to obtain a current regulation output value; and a compensation control signal is obtained by using the current regulation output value and is used for triggering the energy storage compensation circuit to change the charging and discharging states, so that the bus voltage is compensated and regulated to a set threshold range. Through the above mode, the voltage compensation method can effectively stabilize the bus voltage within the set threshold range, and the control logic is simple.

The invention relates to the technical field of power distribution system control, in particular to a transformer area voltage compensation control method and system considering distributed power supply fluctuation. Constructing an electric energy quality influence coefficient of each grid-connected point in each time period according to the three-phase voltage and a difference condition among positive-sequence, negative-sequence and zero-sequence components obtained by three-phase voltage decomposition, and calculating a comprehensive disturbance coefficient of a low-voltage transformer area in each time period by combining voltage difference and voltage change trend synchronism among different grid-connected points; the distribution difference and the coupling influence relation between the grid-connected points are comprehensively considered, and the influence characteristics of the fluctuation of the distributed power supply can be evaluated more accurately; the gain coefficient in the sliding mode controller is optimized based on the obtained comprehensive disturbance coefficient, and the adjusted controller is adopted to carry out transformer area voltage compensation control, so that the defect that the transformer area voltage compensation precision and reliability are insufficient can be overcome.

The invention discloses a medium-voltage voltage regulating circuit, system and method, and belongs to the technical field of medium-voltage power distribution. The medium-voltage voltage regulating circuit comprises a tapped voltage regulating transformer Tr1, a voltage compensation unit, a current compensation unit and a direct-current supporting unit, the self-coupling winding of the Tr1 and the series transformer of the voltage compensation unit are connected in series to a medium-voltage main circuit, the parallel winding of the current compensation unit and the self-coupling winding of the Tr1 share a magnetic core and take the self-coupling winding of the Tr1 as a primary side and a secondary side, and the direct current sides of the power module of the voltage compensation unit and the power module of the current compensation unit are both connected to the direct current supporting unit. Wide-range voltage coarse adjustment is achieved through the Tr1, stepless voltage fine adjustment is achieved through the voltage compensation unit, meanwhile, the topological structure is simplified through the common magnetic core coupling design of the self-coupling winding and the parallel winding of the Tr1, the equipment size, the magnetic loss and the manufacturing cost are reduced, and the stability and reliability of a medium-voltage power distribution system are remarkably improved.

The invention discloses an ion trap voltage parameter intelligent adjustment method based on Bayesian optimization, and the method comprises the following steps: S1, setting a main voltage, a compensation voltage and a phase bias as to-be-optimized parameters, and forming a three-dimensional voltage parameter space; s2, generating an initial voltage combination, loading the initial voltage combination to a high-voltage power supply module, and establishing a corresponding electric field environment; s3, injecting charged particles into the ion trap in an electric field environment, and collecting a track image sequence of the particles; s4, inputting the track image sequence into an image processing module to form particle stability original data; s5, performing nonlinear state estimation on the particle stability original data in a Kalman filter, and calculating a stability evaluation index; s6, taking each group of initial voltage combination and the corresponding stability evaluation index as a sample pair, and establishing a mapping function; and S7, calling the mapping function, and determining an optimal voltage combination in combination with the joint acquisition function. According to the invention, the voltage parameters of the ion trap are intelligently adjusted.

The invention discloses a digital voltage compensation method, which relates to the technical field of power systems, and comprises the following steps: monitoring output voltage signals and load current signals of each point of a power grid in real time, establishing an output voltage digital sequence and a load current digital sequence, and extracting dynamic characteristic variables of current load current representing the change trend of a future time period; judging the working mode of the current running state; based on the voltage digital sequence, comparing with the reference voltage, calculating a real-time-reference voltage feedback compensation amount, taking the dynamic characteristic variable as input, establishing a load-voltage response prediction model, generating a voltage deviation prediction value in a future control period, and obtaining a voltage feed-forward compensation amount; and the current working mode is identified according to the working mode, a dynamic weight coefficient is given to the real-time-reference voltage feedback compensation amount and the voltage feed-forward compensation amount, the final compensation control amount of the voltage of each point of the power grid is calculated, and a driving signal is generated to dynamically adjust the voltage of each point of the power grid in real time and accurately. The power quality of the power grid is improved.

The application relates to a high-precision addressable ring oscillator test chip, method, device and medium, which comprises an addressing module, an output module and a plurality of ring oscillator test modules; the ring oscillator test module comprises a signal transmission module, a multifunctional test module and a plurality of ring oscillator test structures; the addressing module is used for selecting a ring oscillator test structure from the ring oscillator test structures of the plurality of ring oscillator test modules to perform a communication test; the multifunctional test module can switch the voltage compensation mode or the small-current test mode of the ring oscillator test structure based on a received control signal; when the characteristic parameters of the ring oscillator are measured, the voltage compensation mode can utilize voltage drop compensation to reduce the influence of the resistance voltage drop introduced in the test path, effectively improving the measurement precision, and the small-current test mode can effectively measure the static power supply current of the ring oscillator.

The invention belongs to the technical field of arc plasma power supplies, and particularly relates to a regulation and control method and system for a direct-current arc plasma power supply, and the method comprises the steps: providing a power supply circuit system which comprises a direct-current power supply module, an inversion rectification module, a voltage compensation module, a steady-current inductor and an arc load which are connected in sequence, and a current negative feedback drive control circuit and a voltage positive feedback drive control circuit. The current negative feedback driving control circuit adjusts the output voltage of the inversion rectification module in a negative feedback mode so as to change the output current. When the forward fluctuation of the voltage pulse of the arc load exceeds the output voltage of the inversion rectification module by a certain proportion, the voltage positive feedback driving control circuit performs voltage compensation by controlling the voltage compensation module; the arc breaking problem caused by large fluctuation of accidental pulse of load voltage is fundamentally solved, stable operation of the arc load can be effectively guaranteed, and the production efficiency and the product quality are improved.

Disclosed are devices including threshold-voltage compensated sense amplifiers and methods of compensation thereof. Example threshold-voltage compensated sense amplifiers according to the present disclosure include circuitry for providing threshold-voltage compensation, such as an isolation transistor and at least one pre-charge transistor.

The invention discloses an output voltage compensation method, device and assembly of a dual-active bridge converter. The method comprises the steps of obtaining a first voltage and a first current of a grid-side power supply and a second voltage and a capacitance value of an integration module; according to the zero crossing point moment of the first voltage, an insertion beat compensation starting point of the output voltage of the energy storage output module is determined; the insertion beat compensation starting point is a target moment after the zero crossing point moment; according to the first voltage and the first current of the network side power supply, the second voltage and the capacitance value of the integration module and the switching period of the switching module of the secondary side bridge arm circuit, the voltage compensation amount of an insertion beat compensation end point is determined; according to the voltage compensation amount of the integration module at the end point of the beat insertion compensation, determining beat insertion time; and controlling the conduction state of the secondary side bridge arm circuit at the insertion time at the insertion compensation starting point so as to adjust the average value of the output voltage of the energy storage output module to be continuous before and after the zero crossing point moment of the first voltage. According to the technical scheme provided by the embodiment of the invention, the oscillation of the output voltage is improved.

The present application relates to a gain compensation method and module and a target voltage determination method. The gain compensation method includes: acquiring angle data of the photomultiplier tube of the detector; the angle data being used for representing a relative angle between the photomultiplier tube and an environmental magnetic field; and outputting a voltage compensation signal to an adjustable power supply circuit according to the angle data; the voltage compensation signal is used for instructing the adjustable power supply circuit to adjust a supply voltage output to each photomultiplier tube, so as to cause an output amplitude of the photomultiplier tube to reach an expected output amplitude.

The invention discloses a fault component compensation type low-voltage ride-through control method and system of a distributed power generation system and a storage medium, and the method comprises the steps: introducing a difference value between a d-axis voltage instantaneous component of a common coupling point and a system rated voltage into a quadrature-axis voltage compensation branch during the voltage drop period of a power grid, and obtaining a quadrature-axis voltage compensation amount through compensation coefficient calculation, the calculation result is added to the phase-locked loop control link, the q-axis voltage of the common coupling point tracked by the phase-locked loop is adjusted in real time, and the problem that the phase angle of the distributed power generation system is prone to loss stability during the transient state is effectively solved without any additional control information. And the low-voltage ride-through capability of the distributed power generation system under the extreme working condition is obviously enhanced.

The application discloses a voltage fast compensation method, a voltage compensation device and a charging pile, and is applied to the charging pile, wherein the charging pile comprises a charging end and a charging device; the charging device is used for outputting corresponding electric energy to the charging end according to the charging request of the to-be-charged equipment when the to-be-charged equipment is connected to the charging end, so as to charge the to-be-charged equipment; the voltage fast compensation method comprises the following steps: acquiring the charging request of the to-be-charged equipment and detecting the electric energy output to the charging end by the charging device, so as to generate an electric energy compensation strategy according to the charging request of the to-be-charged equipment and the electric energy of the charging end; and after a corresponding compensation voltage is generated according to the electric energy compensation strategy, the compensation voltage is coupled to the charging end. According to the application, the charging request and the electric energy of the charging end are detected in real time, the compensation voltage is immediately output when the two are unbalanced, the output voltage of the charging end is ensured to always meet the request voltage of the to-be-charged equipment, and the response speed and stability of the charging pile are improved.

The invention provides an LED control circuit. The LED control circuit comprises a DC-DC conversion circuit; an LED; a drive current control unit that controls the magnitude of the drive current supplied to the LED in accordance with the drive current control signal; the voltage division sampling unit provides feedback voltage for the DC-DC conversion circuit; the compensation current control unit is used for controlling the magnitude of compensation current output to the voltage division sampling end according to the compensation current control signal; the temperature sensing unit senses the temperature of the LED control circuit and generates a temperature sensing signal; when the temperature represented by the temperature sensing signal is higher than a preset temperature threshold value and the input voltage is lower than a preset voltage threshold value, the control circuit reduces the driving current provided for the LED by adjusting the driving current control signal and improves the compensation current provided for the voltage division sampling end by adjusting the compensation current control signal. Compared with the prior art, power output can be dynamically adjusted according to voltage and temperature, so that the temperature rise of a product is reduced, and the life cycle of the product is prolonged.

This disclosure provides a pixel circuit, a driving method, and a display device. The pixel circuit includes a driving circuit, a first energy storage circuit, a second energy storage circuit, an on / off control circuit, a compensation control circuit, and a writing circuit. A first terminal of the first energy storage circuit is electrically connected to a first node, and a second terminal of the first energy storage circuit is electrically connected to a fourth node. The second energy storage circuit is electrically connected to a fifth node. Under the control of an on / off control signal, the on / off control circuit controls the connection or disconnection between the fourth node and the fifth node. Under the control of a compensation control signal, the compensation control circuit controls the connection or disconnection between the first node and a third node. Under the control of a writing control signal, the writing circuit writes data voltage to the fifth node. This disclosure can separate threshold voltage compensation and data voltage writing, and can fully charge the pixel circuit through data voltage while ensuring display uniformity, thus ensuring display effect.