45results about How to "Taking into account the reliability of power supply" patented technology

The invention relates to a distributed generation intelligent monitoring system. The intelligent monitoring system can predict the generated power of a photovoltaic module and a wind power module of distributed generation, and the changes of loads and implement the optimal control strategy on the basis of the energy storage conditions of a storage battery module, the running conditions of a diesel generator and the running conditions of a power distribution network, wherein the storage conditions of the storage battery module and the running conditions of the diesel generator are detected in real time, and the running conditions of the power distribution network are obtained in real time.

The invention provides a monitoring method of a micro-grid system capable of automatically realizing energy balance. The monitoring method comprises the steps of S1, acquiring operation data of a wind-powered generating device and a photovoltaic generating device through a wind-powered generating device module and a photovoltaic generating device module on real time, and storing the data; S2, predicating output power of the wind-powered generating device and the photovoltaic generating device within the preset time in the future according to the operation data of the wind-powered generating device and the photovoltaic generating device; S3, detecting to obtain SOC of a storage batter module and capacitance voltage values of a super capacitor on real time, and acquiring the load power demand condition in a micro-grid on real time; S4, acquiring large grid parameters and scheduling information on real time, and predicating the power demand of a connecting point between the micro-grid and the large grid in the future; S5, optimally operating the micro-grid by using the power demand of the connecting point between an energy storing station and the large power grid, the current energy SOC of the storage battery and the capacitance voltage of the super capacitor, the current load power demand in the power grid, and the output power of the wind-powered generating device and the photovoltaic generating device in the future as the constraining conditions.

The invention provides a monitoring method for a wind power plant energy storage system. According to the method, the generated power of a wind power plant can be predicted, the load changing situation is predicted, the battery capacity of a storage battery module is detected in real time, the running situation of a power distribution network is obtained in real time, the most appropriate control strategy is formulated and implemented, it is guaranteed that the wind power plant stably outputs power, the safety of the energy storage system is improved, and the service life of the energy storage system is prolonged.

The invention relates to a wind-driven generator and diesel engine load coordinated frequency modulation method applicable to a high-permeability renewable energy micro power grid. The method includesfollowing steps: 1) establishing a micro power grid model containing a double-feed asynchronous wind driven generator, a diesel engine and a controllable load; 2) obtaining coordinated frequency modulation characteristics of various frequency modulation micro sources containing a high-permeability wind power micro power grid; and 3) obtaining a wind driven generator and diesel engine load coordinated frequency modulation mode applicable to the high-permeability renewable energy micro power grid according to the micro power grid model and the coordinated frequency modulation characteristics, namely, the double-feed asynchronous wind driven generator and the diesel engine preferably participate in frequency modulation, the controllable load participates in frequency modulation only when anabrupt change amount of the load is greater than a standby capacity of the wind driven generator and the diesel engine, and coordinated frequency modulation is realized through coordination of frequency modulation parameters of the wind driven generator, the diesel engine and the controllable load. Compared with the prior art, the method is advantageous in that the frequency modulation capabilities of the wind driven generator and the diesel engine are fully utilized, the frequency modulation pressure of the controllable load is reduced, and the reliability of power supply of a demand side isguaranteed.

The invention discloses an operation and monitoring method for a battery energy storage power station based on power prediction. The operation and monitoring method comprises the following steps: 1, acquiring operation data of photovoltaic power generation equipment in real time through a photovoltaic power generation equipment monitoring module, and storing data; 2, according to the operation data of the photovoltaic power generation equipment, predicting output power of the photovoltaic power generation equipment within a future reserved moment, and predicting inactive power of an SVG module which can be output; 3, detecting and acquiring SOC of a storage battery module in real time, and acquiring the use situation of load power of a power station in real time; 4, acquiring parameters and scheduling information of a large power grid in real time, and predicting power demands of a connecting point of the energy storage power station and a large power grid in real time; 5, by taking the power demands of the connecting point of the energy storage power station and the large power grid, the SOC of present stored energy of a storage battery, the load power demands of the energy storage power station, the future output power of photovoltaic power generation equipment, and exportable inactive power of the SVG module as constraint conditions, achieving optimal control on a battery energy storage system.

A monitoring device of a wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner has the advantages that the monitoring device can predict the power generation power of wind-photovoltaic power generation equipment in a micro-grid and the load change in the micro-grid, track grid connection point voltage information of large power grids, acquire large power grid scheduling instructions in real time, detect storage battery module battery capacity in real time, set energy accumulation system discharge intervals, perform optimized management on the energy of an energy accumulation system on the basis of an SOC hierarchical control strategy, correct the charging and discharging power of the energy accumulation system in real time, optimize the working performance of the energy accumulation system, make and implement most appropriate control strategies, guarantee that the micro-grid participates in large power grid voltage adjusting according to the requirements of the large power grids during grid connection, and guarantee voltage stability during grid-connected operation.

The invention relates to a distributed generation system. The system is provided with an intelligent monitoring system; the intelligent monitoring system is capable of predicting the generated output of a photovoltaic module and a wind power module of a distributed generation and predicting the change condition of load, and upon the real-time detected energy storage condition of a storage battery module, the running condition of a diesel generator and the real-time acquired running condition of a power distribution network, the optimum control strategy is implemented.

A wind, photovoltaic and storage-integrated micro-grid capable of being operated in a grid-connected manner has the advantages that the micro-grid can predict the power generation power of wind-photovoltaic power generation equipment in the micro-grid and the load change in the micro-grid, track grid connection point voltage information of large power grids, acquire large power grid scheduling instructions in real time, detect storage battery module battery capacity in real time, set energy accumulation system discharge intervals, perform optimized management on the energy of an energy accumulation system on the basis of an SOC hierarchical control strategy, correct the charging and discharging power of the energy accumulation system in real time, optimize the working performance of the energy accumulation system, make and implement most appropriate control strategies, guarantee that a power generation system participates in large power grid voltage adjusting according to the requirements of the large power grids during grid connection, and guarantee voltage stability during grid-connected operation.

The invention relates to a micro-grid power prediction method. According to the prediction method, generated power of a photovoltaic module of a micro-grid and generated power of a wind electricity module of the micro-grid can be predicted, the change condition of loads can be predicted, and based on the real-time detected energy storage condition of a storage battery module and the real-time acquired operation condition of a large grid, power supply strategies of the micro-grid are predicted, so that the micro-grid is in a safe, economical and customer-satisfactory operation state.

The invention provides a micro-grid system capable of controlling frequency automatically. By the micro-grid system, the generation power of a power generation assembly in a micro-grid and load change in the micro-grid can be predicted, frequency information and voltage information of a large grid can be tracked, a dispatching instruction of a large grid is acquired in real time, the capacity of batteries of a storage battery module is detected in real time, a suitable control strategy can be formulated and carried out, the frequency and the voltage of the large grid can be adjusted by the micro-grid according to requirements of the large grid, the safety performance of an energy storage system is improved as much as possible, and the service life of the energy storage system is prolonged as much as possible.

The present invention discloses a generated power control system and control method for an intelligent micro-grid with a medium energy storage function. The control system mainly comprises: a wind-solar complementary power generation system, a photothermal generator set with the medium energy storage function, a micro-grid power control system, etc. The control method comprises: by a micro-grid power control center, receiving a power instruction transmitted from a micro-grid dispatching automation system in real time; collecting generated power of the wind-solar complementary power generation system in real time; and calculating a micro-grid optimal power allocation scheme by an energy management system. According to the power allocation scheme, by carrying out coordination control on heat storage of a heat storage system, a heat release rate, and the generated power of the photothermal generator set, stable output of the generated power of the micro-grid is achieved. According to the control method, technical defects of uncontrollability, discontinuity, large fluctuation adn the like of wind energy and solar generated power, which are caused by change of the external environment, can be overcome, the generated power of the micro-grid is stabilized, electric energy of new energy can be consumed to the greatest extent, and the problem of phenomena of ''wind curtailment'' and ''light curtailment'' in the new energy can be effectively solved.

The invention relates to a micro-grid system capable of automatically realizing energy balance. The micro-grid system comprises wind power generation equipment, photovoltaic power generation equipment, an energy storage device, a first AC/DC bidirectional commutation module, a DC bus, a second AC/DC bidirectional commutation module, loads in a micro-grid and a monitoring device, wherein the first AC/DC bidirectional commutation module is used for connecting the micro-grid with a large-scale power grid and isolating the micro-grid from the large-scale power grid; the second AC/DC bidirectional commutation module is used for connecting the wind power generation equipment, the photovoltaic power generation equipment and the DC bus; the energy storage device comprises a storage battery module, a super capacitor and a bidirectional DC/DC converter connected with the DC bus. According to the micro-grid system, generation power of the power generation equipment in the micro-grid and variation of the loads in the micro-grid can be forecast; power of a connection point of the micro-grid and the large-scale power grid can be tracked and forecast; an optimum control strategy can be made and implemented; the micro-grid is guaranteed to rapidly and stably provide active power and reactive power in the grid connection process according to the requirements of the large-scale power grid; the safety and the service life of the energy storage device can be promoted.

The invention relates to a monitoring device for a micro-grid system capable of automatically realizing energy balance. The monitoring device comprises a wind power generation equipment monitoring module, a photovoltaic power generation equipment monitoring module, an energy storage device monitoring module, a large-scale power grid communication module, a grid-connected operation monitoring module, a load monitoring module, a central control module and a bus module, wherein the wind power generation equipment monitoring module is used for monitoring wind power generation equipment in real time and forecasting generation power of the wind power generation equipment; the photovoltaic power generation equipment monitoring module is used for monitoring photovoltaic power generation equipment in real time and forecasting generation power of the photovoltaic power generation equipment; the energy storage device monitoring module can monitor an SOC of a storage battery module, capacitance and voltage values of a super capacitor and a DC/DC bidirectional transducer in real time; the large-scale power grid communication module is used for acquiring an operation condition and related scheduling information of a large-scale power grid from a large-scale power grid regulation and control center in real time; the grid-connected operation monitoring module is used for controlling a micro-grid to be connected with or isolated from the large-scale power grid; the load monitoring module is used for monitoring loads in an energy storage power station in real time; the center control module is used for determining an operation strategy of the micro-grid and sending a command to each module in the monitoring device so as to execute the operation strategy; the bus module is used for communication of each module of the monitoring device.

A monitoring device 11 comprises a photovoltaic power generation equipment monitoring module 114, an energy storage system monitoring module 115, a large power grid communicating module 112, a frequency and voltage modulating module 116, a center control module 117, a wind power generation equipment monitoring module 113, a load monitoring module 118 and a bus module 111. The photovoltaic power generation equipment monitoring module 114 is used for monitoring photovoltaic power generation equipment 12 in a battery energy storage system 10 in real time and predicting the generation power of the photovoltaic power generation equipment 12; the energy storage system monitoring module 115 is used for monitoring a storage battery module 131 and a DC/CD bidirectional transducer 132 in an energy storage system 13 in real time; the large power grid communicating module 112 is used for learning the running condition and relevant scheduling information of a large power grid 20 from a regulation and control center of the large power grid 20 in real time; the frequency and voltage modulating module 116 is used for controlling a micro-grid system 10 to participate in the frequency and voltage modulation of the large power grid 20 and comprises a frequency modulating module, a voltage modulating module and a cooperative control module; the center control module 117 is used for determining the running strategy of the micro-grid system 10 and giving instructions to all the modules to carry out the power supply strategy; the wind power generation equipment monitoring module 113 is used for monitoring wind power generation equipment 14 in real time; the load monitoring module 118 is used for monitoring loads 17 in the micro-grid system 10 in real time; the bus module 111 is used for the signal communication of each module in the monitoring device 11.

The invention provides a monitoring device of a battery energy storage system with a reactive adjusting function. The monitoring device 11 comprises a renewable energy power generation device monitoring module 114, a storage battery monitoring module 115, a power distribution network connection module 112, a grid connection monitoring module 116, a center control module 117, a static var generator (SVG) monitoring module and a bus module 111, wherein the renewable energy power generation device monitoring module 114 is used for real-timely monitoring a renewable energy power generation device 12 in the battery energy storage system 10 and predicting power generation power of the renewable energy power generation device 12, the storage battery monitoring module 115 is used for real-timely monitoring a storage battery module 13 in an energy storage system 10 of a wind power plant, the power distribution network connection module 112 is used for real-timely obtaining operation conditions and related dispatch information of a power distribution network 20 from an adjusting and controlling center of the power distribution network 20, the grid connection monitoring module 116 is used for controlling the wind power plant energy storage system 10 to be connected with or isolated from the power distribution network 20, the center control module 117 is used for determining an operation strategy of the battery energy storage system 10 and sending instructions to the modules so as to execute a power supply strategy, the SVG monitoring module is used for real-timely monitoring an SVG module 14, and the bus module 111 is used for communication and contact of all modules of the monitoring device 11.

The invention discloses a method for monitoring an intelligent distributed wind power generation system with adjustable voltage and power. The method includes the following steps: S1. a wind generation device monitoring module real-time acquiring operation data of a wind generation device, storing the data, and real-time acquiring demand for load power within the wind power generation system; conducting first-order filtering on an active power PWO that is sent by the wind generation device and outputting an expected active power PWf of the wind generation device; S2. acquiring voltage information at grid-connected points, at the same time based on a scheduling instruction of a large power grid, determining demand for an active or reactive power output of the wind power generation system; real-time detecting and acquiring a SOC of a battery module; S3. processing the acquired information about the wind generation device, a power grid and batteries to obtain an expected output power reference quantity PEss=[delta] P1+[delta]PB of an energy storage system, wherein the [delta] P1 is a difference value between PWO and PWf, setting a discharge zone of the energy storage system, and establishing a SOC layered control strategy; S4. with the demand for active and reactive power output, the current SOC layered control strategy, the current demand for the load power within the wind generation system, and the fact that the wind generation device may output an active and reactive power as restraining conditions, implementing optimized operation of the wind generation system.

The invention provides a monitoring method for a battery energy storage system with the reactive power regulation function. The monitoring method comprises the steps that 1, a renewable energy power generation equipment monitoring module obtains running data of renewable energy power generation equipment in real time and stores the data; 2, according to the running data of the renewable energy power generation equipment, the output power of the renewable energy power generation equipment within the future preset time is predicted, and the reactive power, capable of being output, of a SVG module is predicted in real time; 3, the SOC of a storage battery module is detected and obtained in real time, and parameters and scheduling information of a power distribution network are obtained in real time; 4, optimal control over the battery energy storage system is achieved with active demands and reactive demands in scheduling information of the power distribution network, the current storage battery energy storage SOC, the future renewable energy power generation equipment output power and the reactive power, capable of being output, of the SVG module as constraint conditions.

Disclosed is an intelligent distributed type wind power generation system capable of adjusting voltage and power. According to the power generation grid, the power generation power changes of wind power equipment can be predicted; the grid-connected point voltage information of the large power grid can be tracked; the dispatching instruction of the large power grid can be obtained in real time; the battery capacity of a storage battery module can be detected in real time; the discharging section of an energy storage system can be set; the energy of the energy storage system can be optimized and managed based on an SOC hierarchical control policy; the redundant active power of the wind power generation equipment can be absorbed in time, or the deficient active power of the wind power equipment can be supplemented; the influence on the power grid from the wind power generation system can be reduced; it is ensured that the power generation system can participate in the voltage regulation of the large power grid in grid connection according to the requirement of the large power grid; and the voltage stability in the grid connection operation can be ensured.

The invention provides a battery energy storage system 10 with a reactive adjusting function. The system 10 comprises a renewable energy power generation device 12, a storage battery module 13, a static var generator (SVG) module 14, a first alternating current/direct current (AC/DC) two-way conversion current module 16, a DC bus, a second AC/DC two-way conversion current module 15 and a monitoring device 11, the first AC/DC two-way conversion current module 16 is used for connecting and isolating the energy storage system 10 and a power distribution network 20, and the second AC/DC two-way conversion current module 15 is used for connecting the renewable energy power generation device 12 and the DC bus. The battery energy storage system with the reactive adjusting function has the advantages that change conditions of output power of the renewable energy power generation device can be correctly predicted, a control strategy gives consideration to power distribution network dispatch requirements and energy storage system operation conditions, active power and reactive power can be provided for the power distribution network simultaneously, the dispatch requirements of the power distribution network can be met, meanwhile, power supply reliability is achieved, the safety of the energy storage system is guaranteed, and the service life of the energy storage system is prolonged.

Provided is a voltage and power adjustable supervising device for an intelligently distributed wind generator system, which can accurately predict wind power generation equipment output power change conditions, automatically track grid entry point voltage change, determine grid entry point reactive power requirements in real time, control strategies to meet large power grid scheduling demands and power generation system inner load demands, and meanwhile effectively inhibit power generation system voltage impact on a large power grid; the system can be provided with an energy storage system discharge zone, perform optimization management on energy storage system energy based on an SOC layered control strategy, correct energy storage system charge and discharge power in real time, optimize energy storage system work performance, consider power supply reliability, guarantee power generation system safety, and prolong the service life of power generation system inner equipment.