468 results about "Black start" patented technology

The invention provides a hardware-in-the-loop simulation test method and device for a network construction type energy storage converter, and relates to the technical field of electric power grids. The network construction type energy storage converter is connected with the simulation energy storage system and the power grid simulation device, a hardware-in-the-loop simulation test system is constructed, and control parameters of the simulation energy storage system and the power grid simulation device are adjusted based on the simulation test system in combination with test types. Various types of hardware-in-the-loop tests and semi-physical tests such as fault ride-through tests, electric energy adaptability tests and black start tests are realized, and effective evaluation of the performance of the network-forming type energy storage converter is realized. According to the method, the problem of power grid oscillation caused by the fact that the network construction type energy storage converter is connected into the power grid for testing is avoided, the accuracy of the testing result of the network construction type energy storage converter is guaranteed, accurate capturing of performance parameters of different types of network construction type energy storage converters is achieved, and the testing effect of the network construction type energy storage converter is improved.

The invention relates to a wind power off-grid hydrogen production system and a control method thereof. The system comprises a wind driven generator, a black start power supply, an energy storage converter, a machine side converter, a grid side converter, a direct current bus capacitor, a first transformer, a second transformer, a third transformer, an AC-DC converter, a DC-DC converter, an electrolytic bath, a first switch, a second switch, a third switch and a fourth switch. The system comprises a black start mode, a normal operation mode and an emergency operation mode. In the black-start mode, the system is started from a closed state to an operating state through a black-start power supply; in the normal operation mode, the system power balance is maintained by adjusting the electrolysis power; in the emergency operation mode, the system power balance is maintained by adjusting the output power of the wind driven generator; according to the system, the flexible adjusting capacity of the load of the electrolytic cell can be fully explored, an energy storage device except a black-start power supply does not need to be additionally arranged, and wind power off-grid hydrogen production without energy storage can be achieved.

The invention provides a power system recovery method and system of a black-start power supply, a medium and electronic equipment. The method comprises the following steps: establishing a frequency-power response characteristic of cooperative work of a first preset unit and a second preset unit; according to frequency-power response characteristics of cooperative work, obtaining a target frequency response model of sudden load increase under power shortage; determining constraint conditions of the power system according to the target frequency response model; in combination with the target frequency response model, obtaining a target frequency response result of each black-start power supply to the power system when the black-start power supply is started; determining a plurality of power supply aggregation modes of each black-start power supply according to each target frequency response result in combination with a constraint condition; and determining an optimal recovery path of each black-start power supply under the shortest time consumption based on a shortest path algorithm and each power supply aggregation mode, so as to recover the power system according to the optimal recovery path. The problem that a black start method in the prior art is low in adaptability is solved.

The invention relates to the field of new energy technology and power electronics, and discloses a photovoltaic diesel generator energy storage hybrid off-grid and grid-connected household energy storage system, which comprises a data acquisition and state monitoring module for acquiring photovoltaic, diesel generator, energy storage, load and commercial power states in real time and generating system state parameters; the central control and decision module generates a control strategy containing an operation mode and an energy scheduling instruction; the energy flow and conversion execution module executes energy conversion and flow; the seamless switching control module realizes non-impact switching between modes; the self-adaptive safety protection module dynamically adjusts protection parameters; and the emergency response and recovery module executes black start and active recovery in an emergency state. According to the invention, through the unified central control and decision-making module, photovoltaic, diesel generator, energy storage and commercial power scheduling logics are integrated to form a collaborative energy management core, and the system can carry out global optimization on energy flow in grid-connected and off-grid modes according to a preset priority principle.

The invention relates to an off-grid parallel operation starting method of an energy storage system, the energy storage system and a storage medium, and belongs to the technical field of energy storage. The host receives the phase locking synchronization completion signal and sends a voltage unification instruction to the slave after determining that the grid-connected slave completes phase locking synchronization, and the host and the slave are boosted from the black start voltage to the rated voltage based on the voltage unification instruction to complete parallel start, so that fluctuation caused by unstable voltage in the start process of the slave can be improved; the stability of the energy storage system in the off-grid parallel operation process is improved; the slave is started after being synchronized according to the black start voltage phase lock phase established by the host, so that the output voltage after the slave is started is consistent with the output voltage of the host, the voltage consistency of the parallel energy storage current device is high, ring current caused by voltage difference can be reduced, and the operation efficiency of the system is improved; and the slave is started after successful phase locking, so that the risk of starting failure can be reduced.

The invention discloses a network construction type energy storage control method and system suitable for black start, and the method comprises the steps: obtaining a three-phase current actual value of a converter side to judge whether an overcurrent fault occurs or not, and switching off a pulse modulation signal of a switching device in a converter when the overcurrent fault is judged to occur; when it is judged that the overcurrent fault does not occur, a three-phase voltage instruction value, output by the power control loop, of the converter is obtained; obtaining a three-phase current actual value of the converter side, enabling the three-phase current actual value to sequentially pass through the virtual resistor and the high-pass filter to obtain a three-phase voltage compensation value, and obtaining a three-phase capacitance current actual value, corresponding to the three-phase voltage compensation value, in the high-pass filter; the difference value between the three-phase voltage instruction value and the three-phase voltage compensation value is used as a compensated three-phase voltage instruction value; and determining a pulse modulation signal of a switching device in the converter according to a difference value between the actual value of the three-phase capacitance current passing through the damping coefficient and the compensated three-phase voltage instruction value. Wave sealing control is applied, fault current limiting is achieved, and the stability of a power grid is improved.

The invention discloses an AI multi-agent layered hierarchical emergency response system supporting an elastic power grid, and relates to the technical field of substation power response, the AI multi-agent layered hierarchical emergency response system comprises a global situation awareness module, a regional autonomous control module and an equipment toughness execution module, the global situation awareness module integrates multi-source disaster monitoring information, establishes a disaster chain deduction model, and sends the disaster chain deduction model to the regional autonomous control module; quantifying regional disaster intensity and generating a risk map; the regional autonomous control module extracts a high-risk region to divide a balanced island, realizes second-level splitting and black start through an intelligent agent, and constructs an autonomous stability coefficient to evaluate the stability of the island; and the equipment toughness execution module identifies a potential fault area, drives an intelligent agent to dynamically reconstruct a power grid topology, links distributed energy to perform differential energy supplementation according to a load gap, and calculates a recovery speed coefficient to judge the core load recovery quality. The system improves disaster pre-judgment precision and emergency response efficiency, ensures reliable power supply of medical and industrial core loads, and enhances disaster resistance elasticity of a power grid.

The invention discloses an off-grid new energy hydrogen production start control method, system, device and medium, and relates to the technical field of new energy hydrogen production control and micro-grid operation management, and the method comprises the steps: employing energy storage zero-to-boost control and anti-interference communication to establish a bus voltage based on an off-grid system architecture; the output power of the wind turbine generator is adjusted through a variable pitch power following strategy based on short-term wind speed prediction, the power distribution proportion of the wind turbine generator and the energy storage device is dynamically adjusted by adopting an improved NSGA-II multi-target optimization algorithm in combination with the equipment health state factor, and the power output path and the response rate of the equipment are optimized; electrolytic hydrogen production is carried out by adopting electrolytic tank pre-starting condition inspection, stepped power rising and stepped starting of grid-connected transition in cooperation with closed-loop temperature flow regulation and a PID pressure management strategy, and black-start rollback and self-healing control are executed. According to the method, the stable construction of the bus voltage is realized through the boost control from zero energy storage, and the current impact in the starting process is effectively inhibited.

The invention provides a wind generating set, a differential speed regulation device and a control method thereof, the wind generating set comprises the differential speed regulation device, a multi-port converter and an electro-magnetic synchronous generator, and the differential speed regulation device comprises a permanent magnet motor, a differential planetary gear train, a quasi planetary gear train and a speed regulation motor. A permanent magnet motor rotor is connected with a differential planetary gear train planet carrier, and a speed regulating motor rotor is connected with a quasi planetary gear train sun gear. The differential planetary gear train sun gear drives the electro-magnetic synchronous generator rotor to operate at a first preset rotating speed. One port of the multi-port converter is connected with the permanent magnet motor stator, one port is connected with the speed regulation motor stator, and the other port is connected with the electro-magnetic synchronous generator rotor through the slip ring. According to the differential speed regulation device, variable-speed input, self-energized speed regulation and constant-speed output are achieved, and the differential speed regulation device is compact in overall structure, small in size and light in weight; the black start can be realized without taking power from a power grid; and the electro-magnetic synchronous generator is directly connected to the grid, so that the power grid supporting capacity is high.

The invention relates to a new energy power plant black-start capability evaluation method, which comprises the steps of determining evaluation indexes for evaluating the black-start capability of a new energy power plant, including a continuous output capability index, a black-start voltage regulation capability index, a frequency modulation capability index, a frequency modulation time index and a virtual inertia index; obtaining the value of each evaluation index of the new energy power plant to be evaluated, and constructing a standardized evaluation matrix; and based on the standardized evaluation matrix, adopting an entropy weight fuzzy comprehensive evaluation method to evaluate the black-start capability of the to-be-evaluated new energy power plants, and realizing sorting of the black-start capabilities of the plurality of to-be-evaluated new energy power plants. According to the invention, on the basis of seasonal historical data of the new energy power plant, a black-start capability evaluation index system based on seasonal characteristics of the new energy power plant is constructed. And the lack of research on the black-start capability evaluation scheme of the new energy power plant in the prior art is made up. The method can meet the demand of off-line evaluation, and is suitable for industrial application.

The invention relates to the technical field of power grid energy storage control, and particularly discloses a network construction type energy storage system and a control method thereof, and the system comprises a parameter collection module which obtains the voltage, frequency, short-circuit capacity ratio, phase angle and other power grid operation parameters of a grid-connected point in real time; the scene recognition module judges the power grid scene of the energy storage system according to the acquired parameters, wherein the power grid scene comprises a weak power grid scene, a fault scene, an oscillation scene, a phase angle jump scene and a power loss scene; the strategy library module stores control strategies for each scene, including active / reactive control, active / reactive decoupling, overload support, low-frequency oscillation suppression, phase angle stabilization and black start strategies; and the adaptive control module retrieves and calls a corresponding strategy from a strategy library according to an identification result, performs adaptive control on the energy storage system, and realizes intelligent response and stable support for a complex power grid environment. According to the invention, intelligent response and stable support of the energy storage system to a complex power grid environment are effectively realized.

The invention discloses an energy storage type SOP black-start method, system and device based on improved VSG network construction control and a medium, and relates to the field of power grid black-start, and the method comprises the steps: an energy storage type converter MMC carries out the active and reactive control based on an improved VSG network construction control strategy; a non-fault side MMC is controlled to firstly close an isolation circuit breaker and slowly charge a direct-current capacitor, and when the voltage reaches a set threshold value, a current-limiting resistor is quitted; the fault side MMC is started by the same step as the non-fault side MMC; after synchronization is completed, AC circuit breakers between the non-fault side MMC and the feeder load and between the fault side MMC and the feeder load are closed respectively; based on the collected power grid power data, MMC output parameters are adjusted to meet the power grid connection condition, the control mode is switched according to the grid connection state, and the black start process is ended. And by arranging the black start resistor for current-limiting charging and sub-module voltage balance control, the phenomena of overcurrent and voltage unbalance in the black start process are avoided.

The invention relates to the technical field of power system black start, and discloses a black start method and system based on a bipolar LCC-HVDC, and the method comprises the steps: entering a DC system black start stage, starting a bipolar LCC-HVDC system through an ice melting simulation mode, and the bipolar LCC-HVDC system comprises two heat exchanger groups at a sending end and two heat exchanger groups at a receiving end; and entering a load recovery stage, improving the output power of the direct current system, accessing a load, and transitioning to a normal operation state of two-stage forward transmission to complete black start of the receiving end power grid. Based on a bipolar reverse transmission mode and a special control mode of a converter, the bipolar LCC-HVDC system has voltage source characteristics at the initial stage of black start, so that the bipolar LCC-HVDC system can provide voltage and frequency support for a passive power grid at a receiving end; a black start strategy of the bipolar LCC-HVDC system based on AC / DC system characteristics when a receiving end is in a power failure state; the invention discloses a strategy for supporting load recovery of a bipolar LCC-HVDC system based on alternating current and direct current system characteristics.

The invention provides a dual-mode parallel competition-dominated self-synchronizing voltage source centralized photovoltaic system and method, and the method comprises the steps: generating an internal potential first frequency through the control of active power, and generating an internal potential second frequency through the control of DC voltage; the first internal potential frequency and the second internal potential frequency are input into the dual-mode parallel-competition dominant module to generate internal potential frequency and phase angle; the internal potential amplitude is generated through dual control of the grid-connected point voltage and the reactive power, and the internal potential amplitude is adjusted by the internal potential amplitude limiting control module so as to deal with the transient fault of the power grid. According to the control method, the centralized photovoltaic inverter can be freely and smoothly switched in two working modes of maximum power tracking control and limited power control, and the centralized photovoltaic inverter has voltage source characteristics of an autonomous synchronization power grid, autonomous damping power grid frequency and voltage fluctuation, transient fault lower limit current active support, black start and the like in a full operation mode.

The invention provides a method and equipment for optimizing a black-start recovery path of a new energy power system containing network construction type energy storage, and the method considers the fluctuation of the output of a new energy unit, and carries out the black-start optimization modeling of the system after the network construction type energy storage is connected to a bus of the new energy unit. The method comprises the steps of obtaining prediction data of new energy unit output in a new energy power system containing network construction type energy storage, and constructing a black-start network construction resource constraint condition and an operation constraint condition considering the network construction type energy storage system; based on the network construction resource constraint condition and the operation constraint condition, taking minimization of user power failure loss as a target function, and constructing a new energy power system black-start optimization model containing network construction type energy storage; and solving the new energy power system black-start optimization model containing the network construction type energy storage to obtain a power system black-start recovery path. According to the method, the black-start characteristic of network construction type energy storage and the fluctuation characteristic of new energy power generation are considered at the same time, and finally optimization of the black-start recovery path of the power system is achieved.

The invention relates to the technical field of electric power system operation optimization, and discloses a black-start optimization method, system, device and medium for a novel electric power system.The method comprises the steps that the initial operation state of the novel electric power system is determined through a Monte Carlo method so as to construct a black-start optimization model; generating a training sample set according to the initial operation state and the black-start optimization model; training an artificial intelligence model based on a neural network through the training sample set, and resetting an integer variable of the black-start optimization model by using the trained artificial intelligence model so as to take a reset result as an initial condition; and adding the initial condition into the black-start optimization model as an additional constraint, and solving to obtain a black-start recovery strategy of the novel power system for execution, thereby improving the calculation efficiency of the existing black-start model, and ensuring the stability and safety of the operation of the energy storage system at the same time.

The embodiment of the invention provides a black-start control method, an energy storage device and an energy storage system. The performance of the energy storage system can be effectively improved. The black-start control method is applied to the energy storage system, the energy storage system comprises an energy storage device, the energy storage device comprises a plurality of battery clusters, a first controller and a black-start on-off device, and the black-start on-off device is arranged between a target battery cluster in the battery clusters and the first end of the first controller. The method comprises the steps that in response to a black start demand of the energy storage system, the first controller performs black start on the energy storage system based on the target battery cluster, and the black start on-off device is in a closed state; and after the black start, the first controller controls the black start on-off device to be switched from a closed state to an off state.

The invention discloses a synchronous control method for improving a multi-machine black-start frequency phase angle coupling effect, and aims to improve the black-start recovery capability. The system adopts a parallel recovery strategy, so that a plurality of black-start micro-sources are started at the same time, and synchronization is quickly realized. However, the requirement of parallel recovery on the precision of pre-synchronization is extremely high, and due to the fact that in the pre-synchronization process before parallel connection and brake connection, the frequency and the phase angle have a coupling relation, and the rapid change of the phase angle difference in phase angle control easily causes frequency overshoot. In order to solve the problem, the system introduces a linear active disturbance rejection control (LADRC) method on the basis of traditional phase angle control, fast adjustment is made when frequency fluctuation is caused by phase angle difference change by means of high interference resistance and dynamic response speed, and phase angle change becomes more stable and controllable through timely and stable control of frequency, so that the system is more stable and controllable. Therefore, the interference on the frequency is reversely reduced, and the weakening of the frequency phase angle coupling effect is realized. The design not only ensures the rapidity of black start, but also improves the stability and recovery capability of the system.

The invention discloses a network construction type matching control strategy for integrated energy management in a black-start scene, and relates to the field of energy storage system network construction control, and the strategy comprises the following steps: S1, an energy storage system supplies power through a transformer; s2, limiting the impact current generated by the transformer in the power supply process through an inverter; s3, energy storage system load power is provided through an energy storage battery and a direct current side capacitor; s4, the three-phase voltage amplitude, frequency and phase angle of the grid-connected point are obtained, difference calculation is carried out on the three-phase voltage amplitude, frequency and phase angle of the grid side, and the difference is limited within a threshold value through pre-synchronization; s5, closing and grid connection are carried out after pre-synchronization is completed, the power grid and the energy storage system supply power at the same time, the direct-current side capacitor is charged, and the rated voltage is recovered; a net-forming type energy storage system is adopted as a black-start power supply, a matching control strategy is adopted, an energy management function is integrated, inertia and damping are flexibly provided for the energy storage system, and the pressure of an energy storage battery serving as the black-start power supply under extreme conditions is relieved.

The invention provides a DRU system based on a blocking type auxiliary current converter and a starting method of the DRU system. The DRU system comprises a shore current converter, an offshore rectifier and an offshore auxiliary current converter. The starting method comprises four stages. A V / f control strategy is adopted for activating a shore converter control system and a blocking type auxiliary converter, and an offshore alternating-current power grid is established; the chopper circuit is triggered, and the circuit breaker is safely disconnected by using a zero-current switching technology; the offshore wind plant quits the low-voltage ride-through mode, and starting of the DRU system is completed; according to the invention, by introducing the blocking type auxiliary current converter and combining the DRU and the main current converter, black start and stable operation of the wind field are realized; moreover, the system has the characteristics of quick response and high reliability, can quickly establish AC voltage in the starting stage, and provides required starting energy for the wind turbine generator. The auxiliary converter can provide reactive power support and harmonic suppression during normal operation of a wind field, and the stability and efficient operation of the system are ensured.

The invention provides a micro-grid black start recovery optimization method and device based on adaptive Benders decomposition, and the method comprises the steps: providing a Benders two-stage solving algorithm fused with an adaptive penalty factor for the hierarchy and constraint complexity of a micro-grid black start two-stage optimization model. In the first optimization stage, a micro-source recovery sequence and a recovery path are optimized based on a Benders decomposition method of an adaptive penalty factor, and in the second optimization stage, load recovery is optimized in combination with mixed integer programming. According to the method, the precision of the optical storage model is improved through dynamic characteristic correction, the recovery efficiency and stability are balanced through a two-stage framework, the solving performance is improved through an adaptive algorithm, and efficient and safe recovery of black start of the micro-grid is effectively achieved.

According to the standby power system and the starting control method thereof provided by the invention, when the grid-connected and off-grid controller is powered off, the first control circuit provides the low-level signal to the second control circuit of the inverter as the off-grid signal, so that when the voltage of the direct current side of the inverter meets the condition of the starting voltage value of the inverter, off-grid black start is preferentially carried out, and the starting time of the inverter is shortened. And after starting is completed, off-grid operation outputs alternating current voltage to quickly supply power to a standby power load. And if the inverter detects that the voltage of the alternating current side meets the condition of the minimum off-grid output voltage value and receives a high-level signal as a grid-connected signal before the inverter is started in an off-grid mode to output the alternating current voltage, the inverter can be directly switched to be started in a grid-connected mode, and rapid starting is completed. When the voltage of the power grid meets the under-voltage protection voltage value condition, the grid-connected and off-grid controller can be directly started in a grid-connected mode to run in a grid-connected mode, the first switching circuit is closed, a high-level signal is sent to serve as a grid-connected signal, power is rapidly supplied to the standby power load, and meanwhile voltage is provided for the alternating current side of the inverter.

The invention relates to the technical field of power system operation monitoring and control, and provides a coordination control method of a wind storage combined black-start power supply based on inertia response. According to the method, a wind generating set and a flywheel energy storage system are configured to be black-start power supplies, a virtual inertia time constant and a power demand are calculated by monitoring power grid frequency deviation in real time, and the flywheel array action depth is determined. The power output of the flywheel array is controlled by adopting a hierarchical control strategy, the charging and discharging state of the wind storage system is adjusted according to the frequency change, the SOC state of the flywheel energy storage system is monitored in real time, and the SOC is balanced by utilizing a Nash bargaining solution negotiation algorithm. In the black-start process, the power output of the wind storage system is dynamically adjusted according to the frequency, and the two cooperate to maintain the power grid frequency stable. The method effectively solves the problems of power grid black start and frequency stability under the high proportion of new energy power generation, prevents energy storage from being overcharged and overdischarged, improves the power grid black start success rate and operation stability, and promotes the efficient utilization of new energy.

The invention discloses a computational analysis method applied to high-power power electronic networking equipment, and relates to the technical field of power systems. According to the method, broadband power grid impedance, equipment state and device working condition data are acquired through a sensing layer, and accurate input is provided through layered compression and priority transmission; the cooperative calculation layer introduces a power grid impedance correction coupling interference matrix, establishes an electrothermal coupling loss mapping relation, and realizes coupling interference quantification, loss real-time calculation and full life cycle prediction; the linkage optimization layer constructs a multi-objective optimization function, an optimal control parameter is solved through an efficient algorithm, and a segmented execution strategy is adopted to adapt to different working conditions; the closed-loop feedback layer collects operation feedback data, dynamically updates the model and optimizes the weight, and links fault black-start support and optimal power supply recovery path planning. According to the invention, multi-target collaborative optimization of system stability, operation efficiency, equipment service life and power supply reliability is realized, and technical support is provided for large-scale safe and efficient operation of high-power networking equipment.

The invention provides a group black start method and device of a multi-machine parallel energy storage system and the energy storage system, and belongs to the field of energy storage. The method comprises the following steps: acquiring a positive sequence feedback current average value, a negative sequence feedback current average value and group black start given voltage of the energy storage system; performing current-sharing control based on the positive-sequence feedback current average value and the negative-sequence feedback current average value to obtain a positive-sequence average current control quantity and a negative-sequence average current control quantity; performing positive sequence voltage control based on the positive sequence average current control quantity and group black start given voltage to obtain given output current; based on the negative sequence average current control quantity and the given output current, current control is carried out, and a target control quantity is determined; and controlling the corresponding energy storage converter to perform synchronous black start based on the target control quantity. According to the invention, synchronous black start of each energy storage converter can be realized, sequential start is not needed, a lot of time can be saved, and the power of the energy storage system can reach an expected output level.

The invention relates to the technical field of electric power, and provides a cooperative control method for a multi-converter system of a new energy station, which can deal with a switching failure condition in a process of switching from a grid-connected operation mode to an off-grid operation mode. In a grid-connected operation mode, an energy storage converter of an energy storage system detects whether a power grid has a fault or not; if the power grid breaks down, mode switching is started to switch to an off-grid operation mode; if the mode switching fails, a black start strategy is entered, and in the black start strategy, through an energy storage converter of the energy storage system, in-grid bus voltage is established, a new energy power generation system is started, a load switch is closed, and an off-grid operation mode is entered.

The invention discloses a black-start control method and system for a light hydrogen storage micro-grid, a storage medium and a product, and relates to the technical field of black-start control of the light hydrogen storage micro-grid, and the method comprises the steps: controlling a photovoltaic unit to be merged into a DC bus, and controlling the photovoltaic unit to output first preset power based on a limited power control mode; when the first voltage of the direct-current bus is stabilized at the first preset voltage, controlling the hydrogen production bus to be merged into the direct-current bus; the second voltage of the merged hydrogen production bus reaches a second preset voltage value, and the second preset voltage value is smaller than the first preset voltage value; controlling at least one electrolytic cell to start; the current total power of the electrolytic cell is less than or equal to the sum of first preset power and energy storage unit rated power; and increasing the first preset power, updating the current total power of the electrolytic cells based on the first preset power, and returning to control the starting of at least one electrolytic cell until all electrolytic cells are started. According to the invention, black-start control of the micro-grid formed by the small-capacity energy storage system can be realized.

The application provides an energy storage system and a black start device. The energy storage system comprises a battery cluster and a black start bus. The battery cluster comprises a plurality of battery packs connected in series. A target battery pack in the plurality of battery packs carries a black start control. The black start control is used to turn on an electrical connection between the target energy storage battery and a target auxiliary power supply when triggered. The target auxiliary power supply is used to supply power to a target controller and the black start bus based on the electrical energy provided by the target energy storage battery, so as to trigger the black start bus to supply power to the auxiliary power supplies of other battery packs. The auxiliary power supplies in the other battery packs are used to turn on the electrical connection with the energy storage batteries based on the electrical energy provided by the black start bus, and supply power to the controllers based on the electrical energy provided by the energy storage batteries. By using the application, the problems of poor starting experience, high cost and low reliability caused by the fact that all battery packs need to be installed with black start controls can be avoided. In addition, the power supply power of the UPS is reduced when the black start is performed through the UPS, and the cost of the black start is significantly reduced.

The invention proposes a power plant black-start unit monitoring and fault early warning method, and the method comprises the steps: deploying a sensor array at a key part of a unit through a high-precision sensor network, constructing a neural network model through an LSTM deep learning algorithm based on collected key state data, carrying out the modeling analysis of multi-dimensional time series data, and carrying out the early warning of a fault of the unit. The method comprises the following steps: acquiring a dynamic characteristic mode of a unit operation state, reconstructing a characteristic vector into a two-dimensional characteristic graph by combining a CNN convolutional neural network, performing fault mode identification, acquiring a potential fault type and risk level assessment, and establishing a dynamic threshold adjustment mechanism by adopting an adaptive threshold fault diagnosis algorithm based on the fault type and risk level assessment. And abnormal state determination is carried out, and accurate fault early warning signals and disposal suggestions are obtained. According to the method, the data processing capacity and the system expansibility are improved, the prediction model and the optimization model are constructed through the big data analysis technology, scientific selection and starting time sequence arrangement of the black-start unit are achieved, and the success rate and reliability of black-start are improved.

The invention discloses an energy storage black-start load identification method based on dynamic response and related equipment, and aims to solve the technical problem of high secondary collapse risk of a system caused by blind closing and power transmission of an unknown load in an energy storage black-start process in the prior art. According to the method, before formal switching-on power transmission, customized safety test pulses are generated through a pulse parameter model according to physical parameters of a power line, and dynamic response signals of loads are collected and analyzed, so that prospective recognition of the health states of the loads is achieved. According to the method, the load recovery in the energy storage black start is changed from blind closing to a controllable process of first diagnosis and then power transmission, so that the risk of secondary collapse of the system due to fault load access is fundamentally reduced.