22results about How to "Improve voltage stability" patented technology

The application discloses a kind of regulation and control method and device of broadband resonance damping characteristics, the method includes that target node in electric power system is sampled to broadband signal, target voltage instantaneous distortion and target current cumulative deviation are obtained, to calculate energy transmission delay factor and energy balance correction factor;According to energy transmission delay factor and energy balance correction factor, calculate local damping dynamic coefficient and control accuracy real-time error, to optimize target voltage instantaneous distortion and target current cumulative deviation;According to the target voltage instantaneous distortion and target current cumulative deviation after optimization, and local damping dynamic coefficient updates power flow distribution proportion, to improve the voltage stability of target node.Can be through energy transmission delay factor and balance correction factor quantitative analysis the transient characteristics of energy change of electric field and magnetic field;According to the transient characteristics in combination with the real-time running state of electric power system, regulate and control broadband resonance damping characteristics, to improve the stability of electric power system.

The embodiment of the invention provides a method and equipment for determining a power system configuration scheme and a medium. The method comprises the following steps: determining the initial inertia of a system; if the initial inertia of the system is smaller than the inertia demand value, the reactive response capability of each new energy node is calculated, and a first node is determined; if the first node is different from the previous configuration scheme, taking a new energy node of which the short-circuit ratio is smaller than a short-circuit ratio threshold value as a second node after simulating to carry out network construction type transformation on the first node; determining a current configuration scheme and a corresponding configuration cost; after the second node is simulated to be subjected to synchronous phase modifier configuration, the initial inertia of the system is determined again, and the step of judging whether the initial inertia of the system is larger than or equal to the inertia demand value or not is executed again; and if the first node is the same as the previous configuration scheme, selecting the scheme with the lowest configuration cost. According to the scheme, various configuration schemes of the new energy power system can be determined, the scheme with the lowest cost is selected as the target configuration scheme, and the economical efficiency of system transformation is guaranteed.

This invention proposes an adaptive virtual impedance droop control method, system, device, and medium, relating to the field of droop control. The method includes: calculating the standardized reactive power of each local node and neighboring node based on the equivalent output impedance and reactive power droop coefficient; generating a correction amount for the virtual impedance based on the accelerated consensus algorithm and the standardized reactive power of each local node and neighboring node; adjusting the virtual impedance in the distributed grid topology according to the correction amount of the virtual impedance to obtain the adjusted dynamic virtual impedance; calculating the virtual impedance voltage drop based on the adjusted dynamic virtual impedance; calculating the feedforward compensation voltage reference value; calculating the common compensation amount of the preset virtual leader node and the local compensation amount of each local node and neighboring node to obtain the total voltage compensation command; adjusting the feedforward compensation voltage reference value according to the total voltage compensation command to obtain a voltage stabilization scheme, using the dynamic virtual impedance as the power distribution scheme.

This invention discloses an optimized scheduling method for virtual power plants with multiple resource types, belonging to the field of virtual power plant technology. This method aims to solve the technical challenges of delayed scheduling response due to the strong volatility of distributed resource output, insufficient adaptability to multiple scenarios, and weak distribution network resilience under renewable energy access. The method establishes a multi-resource power adjustable range model based on real-time data, uses linear scaling and displacement algorithms to generate aggregated power domain boundaries, and adjusts the weights according to the different target types of the virtual power plant. It combines ridge regression conditional expectation correction and sub-Bruker optimization to construct a dynamic risk budget, optimizing generation plans and reserve capacity in the day-ahead phase. In the real-time phase, it responds in stages according to power deviation levels, triggering rapid energy storage compensation or emergency interruption of controllable loads. The model parameters are iteratively corrected through a closed-loop feedback mechanism. This method significantly improves the response accuracy and reliability of virtual power plants in frequency regulation, peak shaving, and self-balancing scenarios.

The invention provides a new energy unit transient stability optimization method and system based on active feed-forward, and belongs to the field of new energy power generation. The system includes a current command generator and a current controller. The method comprises the steps of collecting terminal voltage and current of a unit, calculating active power and detecting a transient fault; when a fault is detected, generating an active current instruction through active feed-forward control based on power grid voltage information obtained by an active power signal, a fault voltage amplitude signal and phase locking; meanwhile, a reactive current instruction is generated; a current reference instruction is synthesized, and a converter is driven through closed-loop control to provide power support. According to the method, an active feed-forward mechanism is introduced, so that the new energy unit can respond to the power shortage of the power grid in advance, active and reactive support is quickly provided, frequency drop and power oscillation in the transient process are effectively inhibited, and the transient stability of the power system under the access of high-proportion new energy is remarkably improved.

The utility model provides an intelligent robot emergency stop circuit, including power supply, emergency stop trigger source module is used for triggering emergency stop signal, emergency stop trigger source module includes at least one emergency stop button and at least one anti -collision strip sensor interface, and emergency stop button, anti -collision strip sensor interface are connected with power supply, a plurality of signal processing modules, and each signal processing module includes first photoelectric coupler, and the input of first photoelectric coupler is connected with emergency stop button or anti -collision strip sensor interface, and the output is connected with MCU, self -locking control module respectively, self -locking control module includes self -locking circuit, and the input of self -locking circuit is connected with a plurality of signal processing modules respectively, and the output is connected with motor control module, and motor control module is used for receiving the emergency stop signal of handled and control motor stop movement, the utility model has realized the effective integration to multiple emergency stop signal source, and its self -locking function can maintain the emergency stop state automatically after triggering.

The application discloses a DC-fed receiving-end power grid reactive power distribution method, electronic equipment and a medium, and the method comprises the following steps: obtaining the electrical distance between the substation node in the DC preset range and the DC; sorting the multiple substation nodes in the order from small to large according to the electrical distance, and constructing a reactive power configuration node set to be evaluated for reactive power configuration; calculating and obtaining a reactive power optimization distribution vector based on the reactive power configuration node set; and performing reactive power optimization distribution based on the reactive power gap value under the DC feeding fault and the reactive power optimization distribution vector. The application can ensure that each node can quickly adjust the reactive power output according to the requirements of the optimization distribution vector, fill the reactive power gap, improve the reactive power balance capability and voltage stability of the system under the DC feeding fault, and guarantee the safe and stable operation of the power system by combining the reactive power configuration node set and the reactive power optimization distribution vector to formulate a specific reactive power optimization distribution scheme.

The application discloses a vehicle collision redundancy unlocking system, method and vehicle, and belongs to the technical field of vehicle control. The system comprises a redundancy power supply unit and a driving module. The redundancy power supply unit is used for supplying power to a vehicle body control module, a main power supply unit and a door lock motor of the vehicle when the vehicle is in collision. The driving module is used for controlling the redundancy power supply unit to disconnect with the main power supply unit according to the whole vehicle power supply loop state of the vehicle when the vehicle is in collision, so that the redundancy power supply unit is effectively isolated from an external power grid, the negative influence of the external power grid on the voltage of the redundancy power supply unit is reduced, the voltage stability of the redundancy power supply unit is improved, and the door lock motor is controlled according to the door control state of the vehicle body control module, so that the door is directly driven to be unlocked when the vehicle body control module cannot unlock the door, thereby ensuring that the door is smoothly unlocked after the vehicle is in collision, and the redundancy unlocking precision of the door is improved.

This invention relates to the field of power grid control technology, specifically providing a method, device, and medium for coordinated voltage control of a photovoltaic-storage system. The method includes: acquiring the state parameters of the photovoltaic-storage system; constructing a multi-dimensional evaluation index system based on the state parameters; wherein the multi-dimensional evaluation index system integrates voltage disturbance, reactive power sensitivity, and regulation cost; establishing a voltage coordinated control strategy generation model that integrates the state parameters and the multi-dimensional evaluation index system based on graph attention mechanism and physical constraints; and generating reactive power allocation instructions for each regulation unit of the photovoltaic-storage system using the trained voltage coordinated control strategy generation model. This invention performs task-oriented reactive power allocation based on the differentiated characteristics of various types of energy storage, fully leveraging the regulation potential of various resources, effectively solving the voltage stability problem in scenarios where a high proportion of distributed photovoltaic power is connected to a weak power grid, and significantly improving power supply reliability and power quality.

The application discloses a network-constructing energy storage coordinated control method for supporting grid voltage stability, and steps are as follows: real-time acquisition of state information and network-constructing energy storage output current; when the network-constructing energy storage output current does not reach an overcurrent limiting threshold, the network-constructing energy storage is controlled to adopt a constant voltage amplitude operation mode, the voltage amplitude of a node connected with the network-constructing energy storage is maintained to be equal to a reference value, so that a P-V characteristic curve of a load side is reshaped, the maximum transferable power of the load side is improved, and a static voltage stability margin is increased; when overcurrent occurs in the network-constructing energy storage, the network-constructing energy storage is switched to an overcurrent operation mode, in which mode, the network-constructing energy storage output active power and reactive power are distributed according to the ratio of line resistance to reactance between a grid node and a node connected with the network-constructing energy storage; and when the network-constructing energy storage output current falls below a preset recovery threshold, the constant voltage amplitude operation mode is restored. The application can improve the static voltage stability limit of a load node and the continuous voltage support capability of energy storage to the load under an overcurrent condition.

The application discloses a voltage division offset compensation control circuit and a voltage division offset compensation method. The voltage division offset compensation control circuit comprises: a voltage stabilizing circuit, which is used for sampling an output voltage VO to form a feedback voltage signal, comparing the feedback voltage signal with a reference voltage VREF, and generating an adjustment control signal to adjust the output voltage VO. A compensation circuit is connected with a feedback node of the voltage stabilizing circuit, used for generating a compensation current IX based on the change of the output voltage VO, and injecting the compensation current IX into the feedback node of the voltage stabilizing circuit to offset the voltage division offset caused by the change of the output voltage VO, so that the feedback signal maintains a constant voltage division ratio under different output voltages. The application can eliminate the resistance voltage division error caused by the change of the output voltage in the voltage stabilizing circuit, and ensure the high-precision output of the voltage stabilizing circuit.

This invention relates to the field of electrochemical energy storage technology, specifically to a lithium manganese iron phosphate-nickel cobalt manganese system semi-solid-state battery and its preparation method. The semi-solid-state battery includes a composite positive electrode, a negative electrode, and a semi-solid electrolyte membrane. The composite positive electrode includes an aluminum foil current collector and a positive electrode active material layer coated on its surface. The positive electrode active material layer is a mixture of zirconium-fluorine co-doped lithium manganese iron phosphate and magnesium-doped nickel cobalt manganese ternary materials. This invention significantly improves the overall electrochemical performance of the battery through the synergistic design of a composite positive electrode material system with specific element doping, a three-dimensional conductive network structure of the negative electrode, and a composite semi-solid electrolyte. It is suitable for applications with stringent requirements for safety, low-temperature adaptability, and energy density. The preparation method is compatible with existing lithium-ion battery production lines, requires no additional complex equipment, and has good industrialization feasibility.

The invention provides a network construction type energy storage locating and sizing method considering the voltage stability improvement of a receiving end power grid, and belongs to the technical field of network construction type energy storage planning. The method comprises the following steps: constructing a receiving end power grid total factor simulation model; constructing an optimization model taking the minimization of the total investment cost of the constructed network type energy storage as a target function; constructing constraint conditions of the optimization model according to a small disturbance voltage stability margin constraint, a large disturbance voltage recovery characteristic constraint, and a site selection constraint and a capacity constraint of network construction type energy storage; performing linearization processing on nonlinear terms in the optimization model by using a support function relaxation algorithm; solving the optimization model, obtaining a site selection result and a capacity result of the network construction type energy storage, and checking a relaxation error; and verifying the site selection result and the capacity result by using the simulation model, and if the voltage stability of the receiving-end power grid does not meet a preset requirement, adjusting parameters of the optimization model, and performing solution again. The method can accurately quantify the improvement effect of the network construction type energy storage on the voltage stability of the receiving end power grid.

Disclosed is a resin composition for power cable insulation, which is a recyclable resin composition for power cable insulation, and has excellent heat resistance and voltage stability. The present invention provides a polypropylene resin composition for power cable insulation, comprising: 60-90 parts by weight of a propylene block copolymer having ethylene-propylene rubber (EPR) dispersed in a propylene-ethylene random copolymer; 10-40 parts by weight of a polyolefin elastomer (POE); 100-1,000 ppm of an inorganic nanocomposite based on the total weight of the composition; and 500-5,000 ppm of a HALS (Hindered Amine Light Stabilizer) stabilizer based on the total weight of the composition.

This application discloses a voltage control method, system, and device for grid-connected converters, belonging to the field of power electronic converter control technology. This method addresses the problem of insufficient voltage support capability at the common coupling point in existing grid-connected converters based on voltage and current dual closed-loop control due to virtual impedance and line impedance voltage drop. By adding a compensation term to its reactive power-voltage droop control loop to compensate for the impedance voltage drop, the method ultimately improves the voltage support capability of the grid-connected control converter and enhances the voltage stability of the power system.

This disclosure discloses an aqueous high-voltage electrolyte and its preparation method, as well as a supercapacitor, belonging to the field of supercapacitor technology. The preparation method of the aqueous high-voltage electrolyte includes: adding an electrolyte salt to deionized water and stirring until the electrolyte salt is completely dissolved to obtain a mixed solution; adding a high-voltage additive and a hydrogen-eliminating additive to the mixed solution, and stirring to obtain the aqueous high-voltage electrolyte. This disclosure utilizes the synergistic effect of two additives, which preferentially adsorb at the electrode / electrolyte interface. By adjusting the interfacial double-layer structure, disrupting the hydrogen bond network of water molecules, or forming a protective layer, these additives effectively increase the water decomposition overpotential, thereby achieving a stable widening of the operating voltage window without significantly altering the basic composition and physicochemical properties of the electrolyte.

This invention discloses a multi-objective collaborative programming method for STATCOM to improve voltage stability, comprising: selecting candidate buses as installation locations for STATCOM using sensitivity analysis; generating a first-generation data population based on the candidate bus sieve using a second-generation non-dominated sorting genetic algorithm, including initial capacity and wind curtailment ratio of the wind farm; calculating the static voltage stability index of the system; simulating the uncertainty of wind power output using TOAT sets, and calculating the short-term voltage stability index under the corresponding accident for each TOAT; selecting the optimal Pareto solution based on investment planning and operating costs, static voltage stability index, and short-term voltage stability index under different wind power output conditions, and updating the initial capacity and wind curtailment ratio in the previous generation data population; generating a new generation of data and executing steps S3 to S5 if the iteration has not terminated; and obtaining the optimal solution when the iteration terminates.

The invention discloses a reactive power coordination regulation and control method and system for a traffic energy fusion system, and solves the technical problems of reactive power coordination and voltage instability caused by high-proportion distributed energy access in the traffic energy fusion system. The method comprises the following steps: initializing a system and configuring parameters; the upper virtual power plant coordination layer generates a global guide signal with optimal voltage quality and minimum network loss; the middle evolutionary game coordination layer models a traffic energy unit into a finite rationality agent, and solves an evolutionary stability strategy through an improved replication dynamic equation; the lower deep reinforcement learning execution layer realizes real-time reactive power regulation based on an improved double-delay depth deterministic strategy gradient algorithm; closed-loop iteration is formed through bidirectional feedback coupling, and adaptive optimization is carried out in combination with abnormal processing and an electric vehicle centralized charging scene. A three-layer collaborative architecture and a bidirectional coupling mechanism are adopted, the system voltage stability, economical efficiency and robust adaptability are improved, and the method is suitable for reactive power collaborative regulation and control of the power distribution network.

This invention provides an implantable medical device and system. The device includes a coil for receiving commands and electrical energy; a voltage regulator capacitor unit that can be set to a low capacitance state or a high capacitance state; and a controller for setting the voltage regulator capacitor unit to a high capacitance state and receiving electrical energy through the coil to charge a battery when a charging command is received through the coil, otherwise setting the voltage regulator capacitor unit to a low capacitance state and receiving communication commands through the coil.

The invention discloses a quadrupole rod power source calibration method and device and a storage medium, and the method comprises the steps: obtaining an initial correction coefficient of a quadrupole rod power source, and building an initial voltage correction equation based on a quadrupole rod ion motion equation; setting a characteristic mass number, a target resolution and a pre-scanning range, and collecting spectrogram data in the pre-scanning range according to the initial voltage correction equation; presetting a mass number deviation initial value, dynamically adjusting the mass number deviation according to a comparison result of the resolution in the spectrogram data and the target resolution, and positioning a preliminary spectrum peak corresponding to the characteristic mass number; performing iterative adjustment on the resolution error and the peak error, optimizing the correction coefficient and the initial correction coefficient until the error between the peak center and the characteristic mass number is smaller than a preset threshold value, and determining a final correction coefficient; and calibrating the spectrum peak of the whole mass axis based on the final correction coefficient to complete quadrupole rod power supply calibration. According to the invention, rapid and accurate quadrupole rod power supply initial parameter calibration can be realized without manual intervention.

The invention provides a reactive power compensation equipment parameter coordination calibration method and device, and the method comprises the steps: constructing a system frequency domain admittance matrix according to the admittance model of each power electronic equipment, and obtaining a transfer function matrix between disturbance and AC bus voltage according to the system frequency domain admittance matrix; determining the sensitivity of the amplitude of the transfer function matrix to the parameters of the reactive compensation equipment according to the transfer function matrix; and constructing an optimization model according to the sensitivity and the amplitude adjustment target of the transfer function matrix, and solving the setting value of the reactive compensation equipment parameter through the optimization model.

The utility model discloses a kind of power distribution circuit of power quality comprehensive treatment, comprising: incoming line unit, metering unit, intelligent fusion terminal, outgoing line unit and power quality comprehensive treatment unit, incoming line unit is divided into two branches, one is electrically connected to intelligent fusion terminal, another is sequentially electrically connected metering unit and power quality comprehensive treatment unit, power quality comprehensive treatment unit is electrically connected to outgoing line unit;The power quality comprehensive treatment unit includes transformer, reactive power compensation unit, series side power unit and shunt side power unit, the input side of series side power unit is electrically connected to the output end of transformer, series side power unit and shunt side power unit are in series;The present application is by dynamic voltage stabilizing, reactive current compensation and three-phase unbalance comprehensive treatment, significantly improve voltage stability, ensure load side power supply safety, effectively reduce line loss and transformer overload risk.