431 results about "Power difference" patented technology

The invention belongs to the field of data processing, and particularly relates to a dynamic cooperative control system and method for a gas turbine and a micro-grid, and the method comprises the steps: constructing a micro-grid real-time monitoring module, continuously collecting distributed energy real-time output, controllable load demands, bus voltage frequency and equipment state parameters, and carrying out the filtering and noise reduction through a preprocessing unit, thereby guaranteeing the data precision; calculating a real-time power difference value based on the preprocessed data, calling an adaptive neural fuzzy inference system, taking the power difference value, the bus voltage deviation and the frequency deviation as input, and judging whether the power difference value, the bus voltage deviation and the frequency deviation exceed a preset threshold value by means of a fuzzy rule base and a neural network model; if the threshold values are not exceeded, the current states of the gas turbine and the energy storage system are maintained; if any one exceeds the threshold value, a dynamic cooperative control instruction is triggered, precise cooperative control of the gas turbine and the micro-grid is achieved, and the operation stability, the operation efficiency and the reliability of the micro-grid are improved.

The invention belongs to the technical field of power systems and automation thereof, and relates to a virtual inertia fuzzy self-adaptive new energy inverter frequency active support method. Aiming at the problem of power grid frequency stability caused by new energy power generation intermittency and volatility, the method comprises the following steps: simulating inertia characteristics of a synchronous generator through a direct current side capacitance control strategy; detecting the frequency of the power grid by using a power synchronous ring, and converting a power difference value into a frequency deviation; designing a fuzzy control module, and adjusting the coefficient of the virtual inertia controller in real time according to the frequency deviation to optimize the frequency response; an inverter current given value is adjusted according to the output of the fuzzy control module, and active and reactive power output is calculated and controlled; relevant parameters are monitored in real time, the performance of the self-adaptive control module is evaluated, and parameter optimization response of the fuzzy controller is adjusted. The frequency stability and reliability of the power grid can be effectively improved, the control flexibility and precision of the inverter are improved, and new energy efficient grid-connected power generation is promoted.

The invention discloses a VSG-based energy storage converter three-parameter coordinated adaptive control method, which comprises the following steps of: acquiring three-phase voltage and current of a VSG output port and three-phase voltage data of a grid-connected point, and calculating an output power difference, an output power change rate and a power grid angular frequency difference of the VSG; the power instruction is corrected by combining the power instruction and the power grid angular frequency difference, and the adjustment process of the VSG is divided into six stages according to a power fluctuation curve; the rotational inertia, the virtual damping and the virtual inductance are adjusted according to the power difference and the power change rate in the six stages; the virtual inductor is finely adjusted by combining the VSG output power difference and the output power change rate, and smooth transition of the virtual inductor and smooth adjustment of the power are achieved; the value of the virtual inductance is compared with the initial value of the virtual inductance, and the virtual impedance is subjected to initial value regression operation, so that the power equalization and the system stability of the parallel VSG are not influenced. The method has obvious effects on power oscillation suppression and dynamic performance improvement of the energy storage converter system based on the VSG.

The invention relates to the technical field of electric power reactive power compensation, in particular to a novel static dynamic reactive power compensation device and a control method thereof, and the device comprises a power grid state monitoring module, a reactive power demand calculation module, a compensation control execution module, a harmonic suppression module and a dynamic energy storage support module. According to the method, through real-time extraction and segmented analysis of the dynamic operation parameters of the power grid, accurate perception of the state of the power grid is realized, the transient characteristics of operation are represented, an accurate basis is provided for subsequent compensation, decomposition and classified accumulation of reactive power requirements are realized, inductive and capacitive power differences are accurately identified, the calculation accuracy and efficiency are improved, and load adaptation is optimized; in harmonic suppression, resolution and response speed are enhanced through signal separation and frequency correction, energy storage and compensation linkage is improved through dynamic energy storage optimization, dynamic response capability is enhanced, loss is reduced, voltage stability and power factors are improved, stable guarantee is provided for complex fluctuation scenes, and electric energy is saved.

The invention relates to the technical field of energy storage control, and discloses a demand control method and system based on industrial and commercial energy storage, and the method comprises the steps: obtaining and carrying out the standardized processing of a real-time load demand, an energy storage state and power grid dispatching data; establishing a load prediction model to generate demand baseline parameters, and constructing a dynamic adjustment rule base; the energy storage output is verified in real time, and the dynamic response trend of the power difference value is analyzed; and generating a demand control index to determine a charging and discharging strategy. The system comprises a load monitoring module, a strategy generation module, a dynamic execution module and a control judgment module which are respectively used for realizing data acquisition and processing, model construction, output verification analysis and strategy judgment functions. According to the scheme, through multi-dimensional data integration, dynamic rule base optimization and multi-constraint coordination technologies, the precision and economical efficiency of industrial and commercial energy storage demand control are improved, the demand electric charge can be effectively reduced, the electric energy utilization rate is improved, and the method is suitable for energy storage management and power grid collaborative optimization of industrial and commercial users.

The invention belongs to the technical field of equipment energy-saving control, and particularly discloses and provides an energy-saving control system based on a direct-current bus system, which comprises a direct-current bus framework module, an equipment state acquisition module, an equipment state analysis module and an energy flow control module. According to the method, the direct current bus voltage and the multi-dimensional operation data of the equipment motor are collected in real time, the motor power state space model is constructed by means of the Kalman filter, and the power sudden change probability of the future preset time period is accurately predicted. And meanwhile, an energy distribution strategy is dynamically adjusted in combination with the total power demand generated by the production schedule and according to the braking type and the power sudden change probability. The defect that dynamic power difference cannot be tracked through fixed threshold value feed-forward compensation in the prior art is effectively overcome, so that bus energy deposition is avoided, braking energy is distributed according to needs, meanwhile, it can be ensured that the braking energy can be recycled timely and correctly, and energy waste caused by misjudgment is reduced.

The invention relates to the field of locomotive power battery electric quantity control, and particularly discloses a locomotive power battery electric quantity hysteresis equalization control method, which comprises the following steps that: a traction force exerting mode is reset into an axle load transfer mode, and the initial value of an electric quantity equalization compensation coefficient K is a rack axle load transfer coefficient corresponding to zero speed; judging whether the current mode is a power battery power supply mode; if yes, the TCU receives the electric quantity of a front power battery and the electric quantity of a rear power battery in real time according to the current locomotive working mode, calculates the electric quantity average value difference value, monitors the auxiliary load power and the traction motor power and calculates the power difference value; entering a hysteresis control logic process; calculating a dynamic traction force compensation coefficient, ensuring that the traction force compensation amount is matched with the actual load characteristic of the system, correcting the traction characteristic curve in real time, and dynamically compensating the electric quantity difference of the battery; and performing traction distribution control according to the locomotive speed and outputting corresponding traction.

The invention relates to the technical field of energy storage modules, in particular to a direct-current power supply energy storage system suitable for various household appliances. According to the method, the current change value and the power fluctuation range of the energy storage unit are analyzed, statistics of the power change amplitude and the time interval is combined, the work cycle rule of the energy storage unit is defined, the power difference between the partitions is extracted through the Markov chain model, and real-time balance of the partition power supply state is achieved by gradually optimizing path distribution. And resource waste caused by power fluctuation is effectively reduced. Through gradual correction of a real-time output power value and a target power value, dynamic power matching of an energy storage unit is realized, the flexibility and accuracy of energy distribution are improved, voltage fluctuation trend is monitored and adjusted through a variational mode decomposition technology, voltage stability control of an energy storage module is realized, the reliability of an energy storage system is optimized, and the energy storage efficiency is improved. And the overall stability and the energy utilization efficiency are improved by matching the output power and the frequency adjustment range.

The invention provides a PTC heater output power closed-loop control method and device, the method is applied to an MCU assembly of a PTC heater output power closed-loop control system, and the PTC heater output power closed-loop control system comprises a driving chip, an IGBT assembly, a PTC heater and a sampling circuit. According to the embodiment of the invention, when the updated power difference value is greater than the second preset power value, the power difference value is updated; and performing preset processing based on the updated power difference value and a closed-loop control algorithm to obtain a first duty ratio adjustment parameter, controlling the IGBT assembly to start the PTC heater according to the first duty ratio adjustment parameter by the driving chip so as to adjust the output power value of the PTC heater in real time, and returning to execute acquisition of a plurality of sampling values acquired by the sampling circuit. And performing preset calculation processing on the plurality of sampling values to obtain a sampling power value until the sampling power value reaches a target power value, thereby realizing a power closed loop and ensuring the stability of an output power value.

The invention relates to a peak regulation and frequency modulation control method and device for an electric power system, computer equipment, a computer readable storage medium and a computer program product, and can be applied to the technical field of electric power. The method comprises the following steps: acquiring load power and power generation frequency of a to-be-controlled power system; determining peak regulation control information of the power system according to power difference information between the load power and preset power, and determining frequency modulation control information of the power system according to frequency difference information between the power generation frequency and preset frequency; according to the peak regulation control information and the frequency modulation control information, peak regulation and frequency modulation coordination control is carried out on a compressed air energy storage system and a flywheel energy storage system, so that peak regulation and frequency modulation control is carried out on the power system; the electric power system is connected with the compressed air energy storage system and the flywheel energy storage system. The method can improve the efficiency of peak regulation and frequency modulation control of the power system.

A comparator operating by receiving a supply of a first voltage (VDD / VSS) and a second voltage (VSS / VDD), the comparator comprising: a differential amplifier circuit (110) connected to a first power supply node (Np / Ns) that supplies the first voltage via a first and a second node (N1, N2), and which generates a first current (I1) and a second current (I2) in the first node and in the second node, respectively, wherein the first current and the second current have a current difference obtained by amplifying a voltage difference between an input voltage (Vin) and a reference voltage (VREF) predetermined between the first and the second voltage; a current source circuit (130) connected to the differential amplifier circuit via a third node (N3) between the first power supply node and a second power supply node (Np / Ns) that supplies the second voltage.connected in series and generating a third current (I3) which is a sum of the first and second currents at the third node; an output stage (170) connected between an output node (N6) and the first power supply node and having a current driving force to generate a first output current (I6p) proportional to the first current between the first power supply node and the output node; a current conversion circuit (140) having a current driving force to generate a second output current (I4n) proportional to the second current between the second power supply node and the output node; a minimum selection circuit (150) connected between a complementary output node (N5) and the first power supply node and causing the complementary output node to generate a current (I5) proportional to a minimum current of the first and second currents (I6p,I4n); and a latching circuit (160) connected between the output node and the complementary output node and the second power supply node, wherein the latching circuit performs a reset operation in which both the output node and the complementary output node are electrically connected to the second power supply node in response to a reset signal (RST), and performs a latching operation with positive feedback in which a change generated in the output node is amplified from the second voltage to the first voltage when a high-low relationship between the input voltage and the reference voltage is reversed from a reset cancellation time, while the output node and the complementary output node are electrically disconnected from the second power supply node during circuit operation after the reset cancellation.and sets the voltage at the output node to the first voltage, while the voltage at the complementary output node is set to the second voltage until the reset signal is next input.

The invention relates to the technical field of source-load cooperative scheduling analysis, and relates to a virtual power plant multi-time scale source-load cooperative scheduling control system. According to the method, the hourly consumption load of the current day in the coverage area of the virtual power plant is counted and the total demand load is predicted in combination with historical load demand data, so that accurate prediction of the regional load is realized; energy storage power source dispatching requirements are judged according to the supply power of the virtual power plant, the dispatched energy storage power sources are screened, the output sequence of the dispatched energy storage power sources is determined according to the minute-level consumption load and the supply power in the current time period, and ordered dispatching of the energy storage power sources in supply and demand scenes in different time periods is achieved. Meanwhile, the real-time second-level consumption load is compared with the real-time supply power to obtain the real-time demand power difference, the power of the energy storage power supply is adjusted and scheduled according to the real-time demand power difference, refined dynamic adjustment of the power of the energy storage power supply is achieved, and a systematic solution is provided for virtual power plant multi-time scale source-load cooperative scheduling.

The invention discloses a quantitative evaluation method for secondary frequency modulation benefits of a pumped storage power station and related products. In the method, a power difference average value, a power difference standard deviation, penalty electric quantity, adjustment mileage and power delay time are used as evaluation indexes of the secondary frequency modulation performance of the pumped storage power station; the index set comprehensively considers generator set frequency modulation performance assessment policies implemented by the State Energy Administration East China Energy Supervision Office, American PJM power market performance and wide application experience in different regions in the world, covers existing indexes of different operation specifications of the State Grid of China, and improves the comprehensiveness and typical representativeness of evaluation results. When the secondary frequency modulation performance score of the pumped storage power station is determined according to the degradation degree, through the steps of constructing an index judgment matrix, calculating the index degradation degree, performing fuzzy judgment on a vector and the like, the thinking judgment process can be mathematized, the objectivity of a result is ensured through fuzzy processing, the structure is rigorous, the flexibility is good, and deviation of the overall evaluation result is avoided.

The invention discloses a PTC power control method for IGBT (Insulated Gate Bipolar Transistor) staggered frequency starting and related equipment, and relates to the field of automobile heating, the method comprises the following steps: acquiring a target power value under the condition that a power request signal is received; based on the target power value, calculating to obtain an average starting duty ratio of the plurality of power control units; generating a first control signal corresponding to each power control unit based on the average opening duty ratio; according to the first control signal, controlling each power control unit to be switched on in an error frequency manner; when it is detected that the power difference value between the actual output power of each power control unit and the target power value exceeds a preset deviation threshold value, the starting duration of each power control unit is adjusted, and a second control signal is obtained; and controlling each power control unit based on the second control signal until the power difference value does not exceed the preset deviation threshold value. By implementing the method, the heating performance of the power control unit in automobile heating can be improved.

The invention discloses a control method of a flat wire motor. The method comprises the following steps: constructing an optimal current instruction table taking a rotating speed and a torque as indexes; if the motor is in the dynamic working condition, directly looking up a table to obtain a current optimal current instruction; if in a steady-state working condition, performing online search by taking a table look-up result as an initial point: generating two-dimensional Bernoulli random disturbance, and sequentially applying positive and negative disturbances to the initial point; respectively measuring the input power under the two disturbances; according to the ratio of the positive and negative input power difference to the corresponding disturbance component, synchronously calculating gradient estimation vectors of the system input power to d-axis and q-axis current; according to a steepest descent method, the current instruction is updated in the reverse direction of the gradient, an optimal instruction enabling the input power to be minimized is obtained, and an inverter is driven to control a motor to operate. According to the method, through a hybrid control strategy combining dynamic table look-up and steady-state online search, the total loss minimization of the flat wire motor under all working conditions in consideration of alternating current copper loss is realized, and the rapidity of dynamic response is ensured.

The invention provides a new energy station load stability control method and system based on mutual conversion of electricity and hydrogen energy. Obtaining a generated power prediction curve of the new energy power generation facility, and determining a power difference value between the new energy power generation load and the power grid stability demand based on the prediction curve; a surplus hydrogen production electricity consumption instruction is issued, the operation number and the hydrogen production rate of an electric hydrogen production module are dispatched, and surplus electric energy is converted into hydrogen energy to be temporarily stored; receiving a real-time charging demand signal, dynamically issuing a charging permission load instruction based on the current new energy power generation load and the hydrogen gas turbine power generation load, and scheduling the power output of each charging pile; and according to the real-time states of the new energy power generation load, the electrical hydrogen production electrical load, the charging pile electrical load and the hydrogen gas turbine power generation load, starting, stopping and output power of the hydrogen gas turbine are adjusted, and reverse compensation of the new energy fluctuation power is achieved. New energy power generation fluctuation can be effectively stabilized, abandoned wind and abandoned light are reduced, and stable power supply of the distributed charging pile is achieved.

The invention belongs to the technical field of new energy high-permeability novel power system voltage support, and provides a multi-wind-field virtual direct-axis transient reactance design method for expanding the wind power transmission limit. Comprising the steps of calculation of an original wind power transmission limit value, calculation of an original wind power expansion range, calculation of an original equivalent transient reactance value, introduction of virtual direct current transient reactance, calculation of an improved wind power transmission limit, calculation of an initial optimal transient impedance value, calculation of a dynamic voltage critical value and calculation of a dynamic wind power transmission limit. And calculating a real-time power difference value and calculating an optimal real-time transient impedance value. According to the method, the virtual direct-current transient reactance is introduced, the optimal transient impedance value is calculated by utilizing the improved wind power transmission limit, the voltage supporting potential of the wind turbine generator is fully exerted, and the power transmission stability of the wind power transmission system is remarkably improved.

The invention provides a PTC heater power control method, device and equipment and a medium, the method is applied to a controller of a PTC heater power control system, and the method comprises the following steps: calculating according to an obtained target power value and a current power value to obtain a power difference value; comparing the power difference value with a preset difference value to obtain a comparison result, and adjusting the current duty ratio to obtain a target duty ratio; and for the vehicle battery pack, the IGBT assembly performs continuous power supply control processing on the LC circuit according to the target duty ratio, so that the LC circuit performs real-time adjustment on the average voltage value of the PTC heater in each first preset period, and the current value of the PTC heater in each first preset period forms a preset waveform, thereby realizing power control on the PTC heater. According to the embodiment of the invention, peak current and noise are not generated in the control process, so that the safety is improved.

The invention discloses a combined control method and system of a gravity energy storage hybrid electrochemical energy storage system. The combined control system of the gravity energy storage hybrid electrochemical energy storage system comprises a gravity energy storage system with a storage block and an electrochemical energy storage system with a storage battery and a super capacitor. The method comprises the following steps of: obtaining a power difference of a power instruction required by the gravity energy storage system according to different moments of acceleration, constant-speed and deceleration motion of a storage block; and carrying out power optimization distribution control on the power difference according to the frequency, respectively obtaining the charging and discharging power of the storage battery and the super capacitor, and carrying out charging / discharging supplement by utilizing the electrochemical energy storage system to realize the combined control on the gravity energy storage hybrid electrochemical energy storage system. According to the scheme, the gravity energy storage, the storage battery and the super capacitor can be subjected to power distribution at different time scales, cooperative control over the electricity-gravity hybrid energy storage system is achieved, and the overall performance of the system is effectively improved.

The invention provides a diesel-storage hybrid power anti-overload system and device based on a network-forming inverter, and a medium. A pre-synchronization module realizes seamless switching between a VSG mode and a PQ mode based on dynamic voltage amplitude matching, phase-locked loop frequency synchronization and phase real-time alignment technologies; the hardware current limiting module adopts high-speed current monitoring and hardware-level protection logic to cut off an overcurrent pulse in real time and prevent a power device from failing due to transient impact; the power suppression module optimizes the power distribution of the diesel generator and the energy storage by judging an overload threshold value and a steady state recovery condition in real time; the logic judgment module coordinates the diesel generator dynamic frequency modulation and energy storage mode switching, the diesel generator preferentially bears the transient power difference when the load suddenly changes, and the energy storage mode is seamlessly switched to the network construction mode after the system recovers the steady state; according to the system, through software and hardware full-link collaborative design, the problems of transient overload and mode switching instability of the diesel storage system are solved, and the stability and energy efficiency of the diesel storage hybrid power system are improved.

The invention discloses an energy fine management method and device for an optical storage and charging integrated power station. The method comprises the following steps: determining the charging power difference between the power generation power of new energy of the power station and the power required by charging of an electric device; establishing a relation function between the unit electricity price and the charging power difference of the power station, and representing the charging power difference through the unit electricity price; the unit electricity price is used as an input variable of the fuzzy logic controller, and the output current of the energy storage battery is used as an output variable of the fuzzy logic controller; and the magnitude and the flow direction of the output current of the energy storage battery are controlled by using the output result of the fuzzy logic controller. By adopting the scheme, the expected charging and discharging state of the battery is controlled, the service life of the battery is prolonged, the transmission power between the power station and the power grid is stable, no large instantaneous fluctuation exists, stable control over the light storage and charging integrated power station is achieved, meanwhile, the dependence of the power station on the external power grid is reduced, and the economic benefits of power consumers are improved.

The invention relates to the technical field of photovoltaic power generation monitoring, in particular to a power generation monitoring method and system for a photovoltaic panel, and the method comprises the steps: collecting the electrical parameters and environmental parameters of the photovoltaic panel in real time, and determining a preliminary voltage adjustment step length according to the electrical parameters and equivalent impedance characteristics of the photovoltaic panel; according to the change amplitude, the change rate and the historical stability of the illumination intensity and the temperature at the current moment, an environment influence factor is constructed, the initial voltage regulation step length is subjected to nonlinear correction through the environment influence factor, and the self-adaptive constraint and relaxation regulation of the step length on the severe environment change are realized. And on the basis, carrying out multiple symmetric disturbance operations on the voltage at the current moment, judging the adjustment direction through power difference, and carrying out dynamic adjustment in combination with the step length until the maximum power point is determined. The method improves the accuracy, stability and response sensitivity of photovoltaic power generation monitoring in a complex environment.

The invention discloses a shared charging equipment instruction control system and method based on multi-mode signal fusion, particularly relates to the field of shared charging control, solves the protocol out-of-step overshoot risk, takes a handshake millisecond window as a switching-in port, and synchronously checks a digital message and a physical transient state through surge energy and thermal inertia double indexes. Locking an instruction missing risk before a driving link; the residual error-message joint judgment captures hidden abnormity in real time at a power issuing node, a rollback channel is rapidly pulled back to a safe power grade, and brand-channel mapping logic is triggered to re-plan output resources; a threshold bin dynamically tightens a threshold according to a target-actual measurement power difference, so that prediction and actual measurement are gradually fitted, and new prior is written back to a forward inference link; high-voltage overshoot and power failure of the whole row are avoided, a billing curve is completely matched with a charging curve, high turnover of a port can be kept in a passenger flow peak, the safety is integrally improved, the service life of hardware is prolonged, and the user experience is improved.

The invention discloses a mechanical loss detection method and device for motors. The mechanical loss detection method for the motors comprises the following steps: selecting two same motors as to-be-detected motors; providing a connecting piece, and coaxially connecting the two to-be-tested motors in series through the connecting piece; controlling one to-be-tested motor to be electrified and run, and driving the other to-be-tested motor to synchronously rotate and run; and respectively acquiring a power difference value and other operation loss values of the two motors to be tested, and calculating to obtain a mechanical loss value of each motor to be tested according to a preset relational expression of the power difference value, the other operation loss values and the mechanical loss values. Any two identical motors can be selected as the to-be-detected motors, a detection motor does not need to be additionally arranged in advance for detection, the rotating speed matching requirement of the detection motor is lowered, the mechanical loss value of the to-be-detected motors can be detected and determined conveniently and efficiently no matter how the rotating speed of the to-be-detected motors is, and the detection efficiency of the to-be-detected motors is improved. And the detection precision of the mechanical loss value can be improved.

The embodiment of the invention provides a method, a device and a system for compensating anode voltage and output power of a magnetron, and belongs to the technical field of radiators for microwave heating. The method comprises the following steps: acquiring a current temperature and an anode voltage measurement value of a magnetron; calculating a correction voltage according to the current temperature; determining a temperature change rate according to the correction voltage and / or the anode voltage measurement value; performing PID control on the PWM signal of the magnetron according to the temperature change rate and the target voltage value; judging whether the current temperature is within a safe working interval or not; acquiring a current anode voltage value when the current temperature is out of the safe working interval; calculating theoretical output power according to the anode voltage value; calculating a power difference value between the theoretical output power and the actual output power; judging whether the power difference value is greater than or equal to a difference value threshold value; and calculating a target voltage value according to the theoretical output power and the input power under the condition that the difference value is greater than or equal to the difference threshold value.

The invention relates to the field of wind power research, and discloses a wind power variable pitch and rotating speed cooperative control method, system and device and a medium, and the method comprises the steps: extracting operation space-time working condition characteristics in a target time window according to obtained operation state data and incoming flow environment data, and obtaining working condition space-time comprehensive characteristic indexes; calculating a unit working condition average power value corresponding to the target time window, forming a working condition level power feature set, and obtaining a working condition power difference index according to the dispersion degree of the data; performing feature matching on the obtained indexes, and calculating a cooperative control fusion weight on the basis of the basic weight of the variable pitch channel and the basic weight of the rotating speed or torque channel; and according to the power grid dispatching information and the unit control constraint condition, a cooperative control instruction is generated, and the wind generating set executes the cooperative control instruction to complete cooperative control of the variable pitch and the rotating speed. According to the method, under the condition that grid connection and safety constraints are met, power fluctuation and loads are reduced, variable pitch abrasion is reduced, and robustness is improved.

The invention discloses an active power control method for a flyback topology micro inverter system, and the method comprises the steps: calculating the load power of a load end through a current sampling module, and carrying out the uniform power distribution of a PV primary side branch when the load power is greater than or equal to the rated power of an inverter system; when the load power is smaller than the rated power of the inverter system, the PV primary side branch is closed step by step according to the load power difference; and when the load power is smaller than the minimum set power sum, one PV primary side branch is kept to operate. When the load power is smaller than the minimum set power, all the PV primary side branches are closed, and when the load power is larger than the minimum set power of the PV primary side branch with the lowest minimum set power, the system is started. According to the invention, multi-path regulation and control can be realized, and the control stability of the system is improved. And uniform distribution control, step-by-step adjustment distribution control, minimum power control and active power control are relatively flexible and efficient, so that the service life of the system is remarkably prolonged, and the reliability of the system is remarkably improved.

A method of operating a microgrid while isolated from an outside grid includes dispatching a plurality of green generating systems to deliver a first quantity of power to the microgrid. The method also includes drawing a second quantity of power from the microgrid to power a system that operates to produce a final output product. The method also includes calculating a power different between the first quantity of power and the second quantity of power and reducing the second quantity of power in response to the power difference indicating that the second quantity of power is greater than the first quantity of power.

The invention discloses a power grid power compensation method, which is applied to a controller, and the controller is connected with a power compensation system. The power compensation system comprises a traction transformer and a converter. The converter is connected with the traction transformer through a first power supply arm and a second power supply arm of the traction transformer; the method comprises the following steps: acquiring a first power parameter of a first power supply arm, and acquiring a second power parameter of a second power supply arm; determining a power compensation parameter for performing power compensation on the first power supply arm and the second power supply arm under the condition of determining that a power adjustment condition is met based on the first electric power parameter and the second electric power parameter; the first power supply arm and the second power supply arm are subjected to power compensation based on the power compensation parameter and the converter, namely, the power difference between the two power supply arms (the first power supply arm and the second power supply arm) is adjusted through the calculated power compensation constant and the converter, so that the influence of unbalanced negative sequence voltage is reduced, and the power supply stability is improved.

The invention discloses a power regulation method for an off-grid micro-grid, and the method comprises the steps: predicting the power data of a plurality of distributed power supplies and a plurality of loads at a next moment according to the historical power data; performing power matching on the plurality of distributed power supplies and the plurality of loads according to the predicted power data of the distributed power supplies and the loads; and the power difference between the distributed power supply and the load is compensated through the energy storage system. The output and the load of the distributed power supply are predicted, on-line adjustment is realized, the prediction precision is improved, optimal source-load matching is realized according to a prediction result, relatively high power vacancy and power excess are avoided, the system stability is improved, and rapid power adjustment is realized by adopting coordinated control between the source, the storage and the load.