146results about How to "Stable voltage" patented technology

The invention relates to the field of voltage regulation and control, in particular to a real-time voltage regulation method for a new energy automobile. Initializing a power distribution network voltage measurement module, and collecting voltage data of each node of the power distribution network; setting a voltage deviation threshold value, and judging whether the voltage is in a normal range or not; collected voltage is compared with a set voltage deviation threshold value, a result obtained after preliminary voltage regulation of an on-load voltage regulation transformer is compared with the set voltage deviation threshold value, and a result obtained after cooperative voltage regulation of an electric vehicle charging pile is compared with the set voltage deviation threshold value. According to a comparison result, tap adjustment of an on-load voltage regulation transformer, cooperative voltage regulation of an electric vehicle charging pile and voltage regulation participated by a distributed photovoltaic system are carried out in sequence; and formulating an optimization strategy based on historical data and results of three times of voltage regulation. By means of cooperative voltage regulation, optimal control, intelligent management and the like, the voltage stability is effectively improved, and the adaptability and flexibility of the system are enhanced.

The invention relates to the technical field of diesel generating sets, in particular to a master control loop of diesel generating set equipment. The system comprises a data acquisition module, a model creation module, a dynamic adjustment module and a multi-machine parallel module. Power change data of a load and rotating speed data of an engine are acquired through the data acquisition module, a long-short-term memory network model for predicting the rotating speed of the engine is constructed by utilizing the model creation module, and the fuel injection quantity of the engine is calculated by utilizing a PID control algorithm according to the predicted rotating speed value of the engine through the dynamic adjustment module. According to the change of load power, the fuel injection quantity of an engine is dynamically adjusted, the rotating speed of the engine is regulated and controlled to be in a stable state, it is guaranteed that a generator outputs stable voltage, a multi-machine parallel module controls the output power and frequency of each unit through a droop control method, the frequency is automatically adjusted, and phase embedding is synchronous; and multi-machine parallel loading is realized.

The invention provides a network construction type photovoltaic system control method supporting active support of power grid frequency, and the method comprises the steps: (1) designing a PV system power reduction operation control strategy which is used for enabling a PV system to reserve power to participate in frequency adjustment of a power grid; (2) designing a PI-based DC bus voltage control strategy for adjusting the DC bus voltage to a reference value; (3) designing a load side step-down operation control strategy based on PI, wherein the strategy is used for stabilizing the DC bus voltage in an off-grid mode; (4) designing a VSG control strategy, and enabling the network-forming inverter to simulate a synchronous generator to participate in active frequency modulation; and (5) in a grid-connected mode, designing a pre-synchronization control strategy, and enabling the grid-forming inverter and the power grid to operate in a grid-connected manner. According to the invention, the frequency stability of the new energy high-permeability power system can be improved. In addition, the method only depends on local information, does not need a maximum power point estimator, a central controller or a solar radiation sensor, and has the advantage of low implementation cost.

The invention discloses a reactive voltage control partitioning method and system for a main grid of an electric power system. The method comprises the following steps: determining an electrical distance between reactive nodes of the electric power system; the method comprises the following steps: performing primary clustering on reactive power nodes in a power system according to an electrical distance between the reactive power nodes of the power system, clustering each reactive power source node of the power system and a reactive power load node closest to the reactive power source node into a reactive power source partition, and obtaining a plurality of reactive power source partitions of the power system; the minimum distance evaluation function value serves as the target, secondary clustering is carried out on all reactive power source partitions, a reactive power voltage control partition scheme is obtained, and the distance evaluation function comprehensively considers the inter-class distance and the intra-class distance; the closer the inter-class distance and the intra-class distance are, the smaller the distance evaluation function value is; the intra-class distance and the inter-class distance are calculated according to the electrical distance between the reactive nodes. The reactive power partitioning efficiency of a power system can be effectively improved, and safe, efficient and stable operation of a power grid is ensured.

The invention discloses a reactive power control method based on a photovoltaic grid-connected inverter, relates to the field of reactive power control methods, focuses on a new theory of reactive power control of the photovoltaic grid-connected inverter, and provides a reactive power control method based on the photovoltaic grid-connected inverter by deeply analyzing active and reactive power output characteristics of a grid-connected photovoltaic system and influences of the active and reactive power output characteristics on power grid voltage. A single-inverter control strategy based on a two-phase static coordinate system is provided, independent control of active power and reactive power is achieved, and constraint conditions about reactive power output such as inverter capacity, power transmission line limitation and direct current side voltage limitation are considered. The photovoltaic grid-connected inverter reactive power control method aims at improving the permeability of a power grid to photovoltaic energy grid connection by designing a new control method, meanwhile, voltage fluctuation of a point of common coupling (PCC) can be more efficiently restrained, and then the stability of the voltage of the power grid and the reliability of a power system are improved.

The invention relates to the technical field of mining chargers, in particular to a mining charger charging module input voltage system which comprises a voltage adaptation control module, a rectification and filtering module, a voltage and current adjusting module and a charging system monitoring module. The microcontroller is used for real-time load demand measurement and calculation, and the output voltage of the transformer is automatically adjusted. According to the invention, through real-time current and voltage data analysis and in combination with a feedback mechanism, the voltage regulation precision and response speed are improved, so that the system automatically adapts to the fluctuation of a power grid in a mining area and keeps the voltage stable, thereby ensuring the operation reliability and continuity of mining charging equipment under an unstable power supply condition, reducing the risk of equipment damage, and improving the reliability and reliability of the system. Through efficient current and voltage regulation, the system not only reduces the energy loss, but also optimizes the charging period, and significantly reduces the maintenance cost and improves the operation safety while maintaining the long-term stable operation of equipment.

The invention provides a photoresponse water photovoltaic power generation device based on nano tungsten oxide and a preparation method of the photoresponse water photovoltaic power generation device, and relates to the field of water evaporation induced new energy power generation and novel photoelectric detection. The water photovoltaic power generation device is composed of a substrate, a positive electrode, a negative electrode and a slurry layer, wherein the slurry layer is obtained by drying slurry formed by mixing tungsten oxide, a Nafion solution and deionized water; the water photovoltaic power generation device can generate an open-circuit voltage of 1.4-1.8 V and a short-circuit current of 100-140 nA under the evaporation induction of deionized water. Under the illumination with the wavelength of 435 nm, the output voltage and current change along with the illumination intensity, and the material has the obvious light response characteristic and is expected to be used for optical detection and hydrovolt generator theory research.

The invention discloses a rapid power control method and system for an off-grid micro-grid containing a grid-forming distributed power supply. The method comprises the following steps: based on a microgrid information physical fusion model, sensing and identifying parameters and operation states of each part of the microgrid through a finite state machine; carrying out detailed modeling and description on each state of the system, and clearly displaying state conversion information and conditions of the micro-grid system; primary control based on a network construction type converter is introduced to control the power of the system, active and reactive power output is adjusted, and when the system senses and identifies corresponding parameter changes, each stage of control is triggered to act; secondary control is introduced to carry out rapid power control adjustment on the micro-grid, frequency and voltage excursion caused by primary control is made up, external disturbance is suppressed, and the power of each part of equipment is reasonably distributed; model predictive control based on data driving is introduced, accurate power distribution and global optimal control are achieved, and the system operates stably.

The invention discloses a power supply system containing a hybrid energy storage and diesel generator two-stage emergency power supply, which relates to the technical field of power supply systems and comprises an alternating current bus, a system power supply, an energy storage device, a diesel generator, an important load and an unimportant load. The system power supply comprises a frequently-used power supply and a standby power supply which are respectively connected to the AC bus through switches; the energy storage device consists of a hybrid energy storage system, a three-phase inverter, a filtering unit and an energy storage switch, and is connected to the alternating current bus; the diesel generator is connected to the bus through the grid-connected switch; the loads are divided into important loads and unimportant loads, and the system has four switchable states of common power supply-energy storage parallel connection, standby power supply-energy storage parallel connection, energy storage power supply and diesel generator-energy storage parallel connection so as to ensure stable power supply.

The invention relates to an offshore wind power plant reactive voltage regulation method based on deep learning, and the method comprises the steps: collecting the historical operation data of an offshore wind power plant, constructing an LSTM neural network model, training the LSTM neural network model through employing the preprocessed historical operation data of the offshore wind power plant, adjusting the weight and bias in a network, and obtaining the reactive voltage of the offshore wind power plant. And obtaining operation data of the offshore wind power plant in real time, inputting the operation data obtained in real time into the trained LSTM neural network model to obtain a predicted value of a reactive power demand and a grid-connected point bus voltage amplitude, and according to the predicted value of the reactive power demand and the grid-connected point bus voltage amplitude, combining an operation constraint and a control objective function of the wind power plant. And dynamically adjusting the reactive voltage by adopting a hybrid optimization algorithm. According to the invention, the time sequence characteristics and dynamic changes of the wind power plant can be accurately captured, so that the reactive power and voltage of the offshore wind power plant can be accurately predicted and adjusted.

The invention belongs to the field of temperature sensors, and particularly discloses a CMOS temperature sensing front-end circuit with an adjustable output voltage range, which comprises a temperature sensing module, a bias module, an output module and a power supply module, and is characterized in that the power supply module is respectively connected with the temperature sensing module, the bias module and the output module, and the temperature sensing module is respectively connected with the bias module and the output module; the bias module is connected with the output module; the power module provides voltage for the temperature sensing module, the bias module and the output module, the temperature sensing module detects temperature and outputs current with a positive temperature coefficient and reference voltage irrelevant to the temperature, and the bias module converts the reference voltage into bias current needed by the output module. And the output module converts the current with the positive temperature coefficient into a controllable voltage with a negative temperature coefficient. According to the invention, the flexible control of the output voltage range is realized, and the precision of the temperature sensor is improved. The invention is suitable for the temperature sensor system.

The invention belongs to the technical field of power system automation, and particularly relates to a transformer area power distribution network voltage regulation method, device and equipment in a photovoltaic access scene and a medium. The method comprises the following steps: firstly, determining a topological structure of a transformer area power distribution network, and installing electric energy quality treatment equipment and a flexible voltage regulation device at key nodes; and clustering the distributed photovoltaics by using a clustering algorithm, and determining the adjustment priority of each photovoltaic according to a clustering result. And then, according to the voltage condition of the transformer area side, the corresponding photovoltaic power is controlled in combination with the distributed photovoltaic regulation priority, and the flexible voltage regulation device and / or the electric energy quality treatment equipment are / is regulated, so that the voltage stability is realized. According to the method, the flexibility and the accuracy of voltage regulation are improved, the distributed photovoltaic regulation strategy is optimized, the reliability and the stability of the transformer area power distribution network are enhanced, and technical support is provided for energy transformation and industrial upgrading.

The invention belongs to the technical field of power electronic control, and particularly relates to a networking-direct current voltage stabilization fusion control method and system. The converter is enabled to respond to both the alternating current side and the direct current side through an alternating current and direct current double droop strategy, and the converter is enabled to quickly respond to a direct current droop power instruction by introducing direct current power-angle prediction feed-forward and direct current power-current prediction feed-forward so as to ensure that the voltage of a direct current bus is stable. After the control method is used, the modes of all the converters of the flexible DC system are not distinguished, frequency modulation and voltage regulation response is made on alternating voltage at all ports, and the maintenance effect on a power grid is enhanced. The full-port maintenance DC bus voltage is stable, and the stability is enhanced.

The invention relates to the technical field of power distribution network dispatching, and particularly discloses a power distribution network comprehensive optimization coordinated dispatching method and system based on mobile energy storage. The method comprises the following steps: firstly obtaining coordination information of mobile energy storage and the power distribution network, then obtaining mobile energy storage performance parameters according to mobile energy storage access information, obtaining a stable operation value of the power distribution network through the coordination information, and judging whether the stable operation value of the power distribution network is greater than a preset threshold, if so, judging that the power distribution network is in a stable state, and if not, judging that the power distribution network is in a stable state. If yes, it is judged that the power distribution network is in a load state, the discharging electric quantity is obtained according to the surplus electric quantity and the discharging power, and the mobile energy storage conducts discharging voltage-stabilizing scheduling on the power distribution network according to the discharging electric quantity; in this way, the fluctuating load curve can be adjusted to be stable through mobile energy storage charging and discharging scheduling, and load fluctuation is reduced, so that the voltage of the power distribution network is kept stable.

The invention discloses a harmonic suppression and dynamic reactive compensation control method for an energy router, which is suitable for a micro-grid and a distributed energy access system. According to the method, three-phase current and voltage signals of an alternating current port of the energy router are collected, five-time and seven-time main harmonic components are extracted through fast Fourier transform, harmonic compensation current instructions equal in amplitude and opposite in phase are generated and injected into an inverter to be output, and active counteracting of main harmonics is achieved. Meanwhile, the bus voltage deviation and the change rate thereof are detected, a reactive current instruction is adjusted on line by adopting a fuzzy self-adaptive PI controller, rapid and smooth dynamic reactive compensation is realized, and the bus voltage is stabilized. Decoupling control of active / reactive and harmonic components is realized in combination with Park conversion, and virtual impedance is introduced to enhance system damping and harmonic suppression capabilities. Compared with the prior art, harmonic suppression and voltage support can be simultaneously realized under a single control framework, the response speed is high, the stability is high, and the method is suitable for high-performance grid-connected operation of the multi-port energy router.

The invention discloses a pulse electrochemical crystallization coupled composite constructed wetland system which comprises an energy system, a pulse electrochemical crystallization pond and a composite constructed wetland system, and the energy system supplies energy to the pulse electrochemical crystallization pond and the composite constructed wetland system. Aquaculture wastewater firstly enters a pulse electrochemical crystallization pond, struvite (MAP) sediment is formed through electrochemical crystallization, ammonia nitrogen and phosphate in the wastewater are efficiently removed, and partial removal of organic matter is achieved. Then the wastewater enters a composite artificial wetland system, and the wastewater is deeply purified under the action of filler filtration / adsorption, microbial assimilation / conversion and plant absorption. The pulse electrochemical crystallization coupled composite constructed wetland system is compact in structure, and the defects of high energy consumption of direct-current electrochemical crystallization and low purification efficiency of a traditional constructed wetland are overcome through physical-chemical-biological multi-path coupling enhanced culture wastewater treatment.

The invention relates to the technical field of hydrogen production power supplies, in particular to an alkaline water electrolysis hydrogen production power supply system. Comprising an energy storage battery, a first DC / DC converter, a second DC / DC converter, an AC / DC converter, a first switch, a second switch, a third switch and a series compensation capacitor, the AC / DC converter realizes a function of converting alternating current of a power grid into direct current, the first DC / DC converter realizes a function of converting direct current into direct current, the second DC / DC converter realizes a function of converting direct current into direct current, and the series compensation capacitor realizes a function of converting direct current into direct current. And the series compensation capacitor realizes an additional reactive compensation function. Reactive power compensation is realized by adding the series compensation capacitor, rapid drop of power grid voltage is avoided, and stability of system voltage is guaranteed. The DC / DC is bypassed by closing the isolating switch, and the hydrogen production electrolytic bath is directly driven by the AC / DC, so that the utilization efficiency of electric energy is improved.

The invention discloses an SVC reactive voltage control method and system based on an improved particle swarm active power distribution network, and relates to the technical field of power distribution network planning, and the method comprises the steps: building a distributed photovoltaic output model, and designing a first strategy; establishing a first constraint by taking the minimum voltage deviation of the power distribution network as a target function; and calculating the optimal position and the maximum objective function value of the particles, verifying the number of iterations and outputting the number of iterations. According to the SVC reactive voltage control method based on the improved particle swarm active power distribution network, detailed modeling is carried out on the output characteristics of a distributed photovoltaic power generation system, the adaptability of the whole power distribution network under the photovoltaic access condition is improved, the voltage deviation of the power distribution network is reduced through accurate adjustment of reactive compensation, and the stability of the power distribution network is improved. By improving the random weight in the particle swarm algorithm, the search capability of the algorithm between the global optimal solution and the local optimal solution is improved, and the method achieves better effects in the aspects of adaptability, robustness and response capability.

The invention discloses a converter-free photovoltaic control method applied to a wind-light-storage hybrid energy system, which integrates photovoltaic power generation into a hybrid system by reducing the number of control loops and converters. The designed controller is suitable for a grid-connected system with wind energy and photovoltaic power as main power supplies, BESS as a secondary power supply and FC and an electrolytic cell as three-level power supplies. And through the combination of the pre-compensator and the integrator, the stability of the controller is enhanced, and the steady-state error is eliminated. In the proposed configuration, the GSC maximizes photovoltaic power generation, injects its power into the grid, while sharing the grid load with the RSC. By coordinating the control of the BESS and the fuel cell, the intermittent influence of wind energy and photovoltaic power generation is reduced, and redundant electric energy is used for hydrogen production of the electrolytic cell to support power generation of the fuel cell in adverse weather. And an energy management strategy is provided, so that BESS overcharging is avoided, intermittency and volatility are reduced, and stable power output and service continuity are ensured.

The invention is applicable to the technical field of sewage treatment, and provides an industrial sewage electrolytic oxidation treatment system, which comprises a treatment box, and an anode bar and a cathode bar arranged at the top of the treatment box in a penetrating manner, insulating sliding pipes symmetrically penetrate through and are fixed on two sides of the anode bar and the cathode bar on the inner bottom surface of the treatment box; a cleaning part is arranged between every two adjacent insulating sliding pipes in a sliding manner; an ozone generator is mounted on the inner bottom surface of the treatment box, and piston parts symmetrically penetrate through two opposite side surfaces of the treatment box; the cleaning part comprises an annular cleaning sleeve; a corrosion-resistant elastic diaphragm is arranged on the inner wall of the annular cleaning sleeve; according to the device, linkage of all parts is controlled, so that the annular cleaning sleeve does reciprocating lifting motion along the corresponding insulating sliding pipe, periodical and automatic cleaning of scale on the anode bar and the cathode bar is achieved, human intervention is not needed in the whole process, the scale is prevented from being attached to the anode bar and the cathode bar, voltage stability between electrodes is guaranteed, and the service life of the anode bar and the cathode bar is prolonged. The sewage electrolysis treatment effect is ensured.

The invention belongs to the technical field of urbanization cable distributed capacitance compensation, and discloses a multi-winding grading reactor applied to urbanization cable distributed capacitance compensation, which comprises a multi-winding transformer, a passive series / parallel coarse tuning reactor shunt, an active inversion fine tuning reactor shunt and a controller, the multi-winding transformer comprises a primary winding and N secondary windings, and N is greater than or equal to 3; two ends of the primary winding are connected in series in a power grid cable line; the M secondary windings and the corresponding M bidirectional thyristors are connected in series or / and in parallel to form a passive series / parallel coarse tuning reactor shunt, and M is less than N; the active inversion fine adjustment reactor shunt comprises a single-phase full-bridge conversion circuit, and the alternating current side of the single-phase full-bridge conversion circuit is connected with any one of the residual N-M secondary windings in the multi-winding transformer; and the controller controls the coarse adjustment and fine adjustment reactor shunt to perform coarse adjustment and fine adjustment on the system output inductive impedance so as to perform on-demand compensation on the impedance of the distributed capacitor, and the compensation precision and the power grid electric energy quality can be improved.

The invention discloses a distributed elastic secondary control system for an island AC micro-grid, and relates to the technical field of power system control, and the system comprises the following components: an extended state observer module, an FDI attack model research module, an attack signal estimation and compensation module and an elastic distributed secondary control module. By introducing the extended state observer and the attack signal estimation and compensation module, the influence of the FDI attack on the frequency and voltage of the system can be accurately estimated and compensated, so that when the system suffers from the FDI attack, the control strategy can be quickly adjusted, the frequency and voltage can be stabilized, and the system can be prevented from collapsing or losing stability; and through an improved distributed secondary control strategy, optimal active power sharing is realized, and the stability and safety of the system are further improved.

The application discloses a novel power system multi-time scale voltage control method and system considering sandstorm, and the method comprises the following steps: in the second time scale, based on the dynamic space state model and the adaptive target function, the active / reactive power of the fan is adjusted in real time, and the voltage fluctuation caused by the sandstorm is quickly responded; in the minute time scale, the switch state is adjusted through multi-objective optimization and two-stage topology reconstruction, and the distribution network resilience is improved. The time periods of the second time scale and the minute time scale are sequentially increased, the second time scale focuses on the quick response to the wind speed fluctuation, and the minute time scale focuses on the medium and long term network optimization. The application aims to improve the system robustness under extreme weather through the voltage collaborative control of the second time scale and the minute time scale, and meet the voltage stability, power supply reliability and economic and efficient operation demand under the background of new energy access.

The utility model discloses a steering lamp control circuit, which relates to the technical field of automobile signal lamp control, and comprises a driving circuit, a signal lamp control circuit and a signal lamp control circuit, the steering lamp control circuit is used for controlling the input level of the driving circuit; the driving circuit comprises a first triode, a second triode and a third triode, wherein the first triode is communicated with the steering lamp control circuit through a base; when the steering lamp control circuit outputs a high level, the first triode is conducted; and the second triode is used for being connected with the collector electrode of the first triode through a base electrode and connected with the steering lamp LED lamp group through the collector electrode. According to the utility model, the turning-on and turning-off of the LED lamp group of the steering lamp can be effectively controlled, the accurate transmission of steering signals is ensured, and the stability and safety of the circuit are ensured at the same time.

The invention discloses a device energy saver and method based on idle power rate electric energy recovery, and belongs to the field of intelligent electric power, and the method comprises the following steps: determining a classification result of loss points based on the loss conditions of electric equipment and an electric circuit; obtaining reactive power and residual current of the loss point based on the classification result of the loss point, and configuring a corresponding power-saving module for the loss point; and recovering the reactive power and the residual current, and adjusting the power-saving module based on the reactive power and the residual current.

The invention discloses a multi-standard power supply system and method for a locomotive test, and relates to the technical field of test power supplies, and the structural design of the system is as follows: an input power supply is a three-phase alternating current 10kV power supply; the high-voltage switch K realizes access control and isolation of the system and a public power grid, the connection reactor L realizes energy buffering and inhibits switch ripples in output current, and the soft charging circuit pre-charges the three-stage converter. The three-level converter converts three-phase alternating current 10kV into DC1500 / 750V and outputs the DC1500 / 750V to the direct-current bus, one path of the direct-current bus supplies power to a subway vehicle test line, and the other path of the direct-current bus is inverted into single-phase alternating current 25kV through the output inverter and supplies power to a railway locomotive test line. According to the invention, alternating current test conditions of railway electric traction locomotive vehicles and direct current test conditions of subway vehicles can be satisfied, reliability and quality of power supply are ensured, repeated construction is reduced, and resource waste is avoided.

The application provides a multifunctional static synchronous compensator system, comprising: a plurality of three-phase converter valves, input ends of each three-phase converter valve being connected to a common DC bus; an energy storage valve, being connected in parallel with the three-phase converter valve, and the plurality of three-phase converter valves sharing the energy storage valve through the common DC bus; a switch breaker device, being arranged between the three-phase converter valve and the energy storage valve; and a control unit, being connected with the plurality of three-phase converter valves, the energy storage valve and the switch breaker device respectively. The application also provides a method for operating the multifunctional static synchronous compensator system. The multifunctional static synchronous compensator system provided by the application adopts back-to-back converter valves, shares energy storage elements through a common DC bus, and connects two AC buses to the two sides of the converter valve, so that the system can support the two AC power grids, greatly save the installation capacity of the energy storage elements in the energy storage valve, and provide power interconnection between the two AC power grids and play a role in tidal flow control.

The invention discloses a small horizontal twin-cylinder diesel engine, which relates to the technical field of diesel engines. The engine comprises an engine body, wherein two horizontal inline cylinders are arranged in parallel inside the engine body, each of the cylinders has a diameter of 90 mm and a stroke of 75 mm, and each of the cylinders has a compression ratio of 19:1. A crankshaft output end is arranged inside the engine body, and a low-pressure pump is installed on the engine body. The diesel engine of the invention adopts light materials, ensures a good power-to-weight ratio (0.173 KW / Kg), ensures that the whole machine is small in size and light in weight, and effectively meets the needs of the market. The advanced and precise electronic speed control system can easily realize the conversion of multiple application modes, and the superior engine control capability ensures that the speed fluctuation rate of the engine is controlled within 0.3%, realizes 0 speed regulation, ensures the voltage stability of the equipped generator set, can realize the unchanged voltage value under no-load and load conditions, and improves and facilitates the fault maintainability of the speed control system.

The invention relates to the technical field of voltage support in a power system, in particular to a voltage support SVG regulation and control method and system for a new energy weak transmission end, and the method comprises the steps: determining and optimizing key parameters of an SVG device through a multi-dimensional voltage support optimization algorithm, and meeting the voltage support requirements; through a dynamic working condition self-adaptive voltage regulation and control algorithm, a control strategy is optimized, and real-time output of the SVG is automatically adjusted; an intelligent SVG multi-criterion type selection algorithm is utilized to select equipment, and system integration and debugging are completed; an SVG device is continuously optimized through real-time data monitoring and a global feedback optimization algorithm, and real-time voltage support is achieved; according to the optimized SVG model selection and control strategy, the voltage supporting capacity of a new energy weak sending end system is improved, it is ensured that the voltage is kept stable under the large disturbance and complex working conditions, the equipment requirement and cost are reduced, the resource utilization efficiency is improved, the dynamic response speed is improved, and guarantee is provided for stable operation of the new energy system.

The application relates to a power plant auxiliary power interconnection electrical device, which comprises a first generator and a first generator corresponding first machine end bus, the first generator is connected to a power grid bus through a first main transformer, a second generator and a second generator corresponding second machine end bus, the second generator is connected to the power grid bus through a second main transformer, an auxiliary power interconnection bus, the auxiliary power interconnection bus is connected with the first machine end bus through a first series reactor and connected with the second machine end bus through a second series reactor, and the auxiliary power interconnection bus is further connected with a transient voltage stability system, and the transient voltage stability system is used for providing reactive power support and voltage stability. Through the application, the problem that the steady state and transient stability of the auxiliary power system cannot be guaranteed is solved, the transient voltage stability system can provide real-time reactive power support and maintain the voltage stability of the auxiliary power system.