31results about How to "Reduce wind curtailment rate" patented technology

The invention provides a hybrid energy storage system control method for reducing an abandoned wind rate and tracking a wind-power planned output, which comprises the following steps: collecting a wind-power real-time power PWG (t), a wind speed v and a current planned output Pref; calculating the wind-power theoretical power PWT (t); comparing the wind-power real-time power PWG (t) and the wind-power theoretical power PWT (t), and judging whether the abandoned wind is existed; calculating sliding average Prefb; reading a battery energy storage system charge state SOC value and a super capacitor terminal voltage Uc; respectively allocating a charging and discharging power Pbess (t) of the energy storage battery and a charging and discharging power Pc (t) of a super capacitor and then correcting an actual hybrid energy storage system output PESS (t). According to the method, the hybrid energy storage system is used by combining with the wind-power generation, so that the rate of abandoned wind is lowered and the deviation of the wind-power output and planned output is reduced to improve the ability of the wind-power for tracking the wind-power planned output.

The invention provides a power distribution method based on wind power and thermal power combined power generation. According to the power distribution method, adjustment of a thermal power generating unit is started by judging whether the cross section margin of grid connection point exceeds an upper limit value or a lower limit value, so that the adjustment frequency of the thermal power generating unit is reduced; under the condition that the wind power generation output is larger, the strategy that the wind power is restrained appropriately is taken into consideration, shutdown operation of the thermal power unit is not likely to happen, and harmful operation conditions of a thermal power plant are reduced; under the condition of a certain power instruction, the strategy that wind power and thermal power are delivered out in a bundled mode is adopted, wherein the priority is given to wind power during delivery, when the total generated power of the wind power and the thermal power exceeds the power instruction, reduction of the output of the thermal power unit is taken into consideration, and if when the thermal power unit operates at the minimum technical output, the total power of the wind power and thermal power stills exceeds the power instruction, the measure that a wind power plant stops wind power generation so as to enable the total delivered power to be controlled within the power instruction is taken into consideration.

The invention discloses a control method for controlling participation of energy storage in wind power frequency modulation based on rules. The method based on rules quantitatively gives output powerrequired by wind power generator set rotor control, pitch control and energy storage control when frequency of an electric power system changes, cooperatively controls wind power generator set rotor speed, pitch angle and energy storage charge-discharge power, compensates for the defects of existing simple qualitative description of power distribution between a wind power plant and energy storageby utilizing technical and economic complementarity of rotor control, pitch control and energy storage control, and improves and perfects frequency response capability of the wind power plant with high technical economy to realize capability of the wind power plant in participation in system frequency modulation under full wind conditions, thereby improving frequency stability of the electric power system under high wind power and high permeability, reducing energy storage capacity requirements, reducing wind abandoning rate of the wind power plant, increasing auxiliary frequency modulation service value, reducing set wearing, prolonging service life of the set and improving overall operation economic benefits of the wind power plant.

The invention provides a hydrogen production capacity optimization and configuration method for wind power absorption and wind curtailment through a hydrogen production system. The method is characterized in that the structure and operation characteristics of the wind power hydrogen production system are analyzed, and accordingly the hydrogen production capacity optimization and configuration method for wind power absorption and wind curtailment through the hydrogen production system is disclosed. By analyzing and calculating the wind curtailment level of a wind power plant, a wind power wind curtailment duration curve is formed, a wind power annual wind curtailment power statistic model is built through the interval estimation method, the maximum economic benefit serves as the target, the optimal capacity configuration interval of the hydrogen production system is determined by means of the interval optimization theory, and a multi-attribute decision-making model is built so that the optimal electrolytic cell configuration scheme of the hydrogen production system is determined. According to the method, by means of the hydrogen production system with the optical capacity, wind power adsorption and wind curtailment are conducted through the hydrogen production system, and considerable social benefits are higher on the basis of realization of wind power plant benefits.

The invention provides an external passage-based method for determining optimal peak-regulation installation scale of wind power. The method comprises the following steps of estimating building and running cost of a power transmission line, a wind power plant, a thermal power plant and a water pumping energy storage station according to a given ultrahigh-voltage power transmission line; giving outassembly proportion relation (maximum power) of four facilities under an initial state, supplying power to a load curve, and building an optimization model by taking minimum power utilization cost ofa terminal unit as a target; changing the proportion relation of the four facilities to obtain optimization results under different proportion relates, selecting the result with lowest terminal powercost from all optimization results, obtaining the installation scale (namely optimal peak-regulation installation scale of the wine power) of the wind power plant, the thermal power plant and the water pumping energy storage station according to a corresponding matching scheme. By building the optimization model and determining the optimal proportion of wind thermal storage and transmission, thepower utilization cost of the terminal is lowest on the premise that wind power is enabled to be utilized very well, and the wind abandon rate and the wind power terminal cost can be substantially reduced.

The invention discloses a multi-wind-field bidding method for electric heating and promoting wind electricity consumption on spot, belonging to the electric power system technology field. Targeting a minimum electric consumption cost of a thermal storage type electric boiler system, the multi-wind-field bidding method uses wind curtailment power prediction data and a quotation chart which are provided by a wind field according a thermal load requirement of the heat storage electric boiler system, adopts a particle swarm to perform optimization and realizes the minimum electric consumption cost of the thermal storage electric boiler system under a multi-wind filed bidding mode. The multi-wind-field bidding method for electric heating and promoting wind electricity consumption on spot can promote the consumption of wind curtailment electric quantity, improves electricity selling incomes, benefits the wind electricity consumption on spot, can improve a utilization rate of power transmission properties of a power grid company in off-peak hours and effectively reduces electricity buying cost of the thermal storage electric boiler. As a result, the multi-wind-field bidding method for electric heating and promoting wind electricity consumption on spot can effectively promote popularization and application of electric heating in heat supplying northern regions of China in winter.

The invention provides a capacity optimization configuration method and device of a heat-storage electric warming system. The capacity optimization configuration method comprises the steps of acquiring a wind abandoning rate of a power system; and solving a capacity optimization configuration model which is built in advance, and determining respective installation capacity of a heat exchanger device and an electrical heat exchange device and heat storage capacity of a heat storage device. The optimization on the respective installation capacity of the heat exchanger device and the electric heat exchange device in the heat-storage electric warming system and the heat storage capacity of the heat storage device is achieved, the wind power absorption capability is improved, and the economic cost is reduced; and moreover, the optimization on the respective installation capacity of the heat exchanger device and the electric heat exchange device in the heat-storage electric warming system and the heat storage capacity of the heat storage device can be achieved on the basis that the wind abandoning rate and the economic cost are reduced to a great extent, fixed heat based on power constraint of a cogeneration unit is loosen to the greatest extent, the wind power absorption flexibility of the power grid is improved, and the wind abandoning rate of the power grid in a warming period isgreatly reduced.

The invention discloses an alternating current and direct current hybrid microgrid networking system applicable to large power wind / photoelectricity absorption. The alternating current and direct current hybrid microgrid networking system comprises at least one wind power plant, at least one photoelectric power station, at least one large-capacity power transformation system, at least one DC / DC converter, a first alternating current bus, a first direct current bus, a wind power delivery wire, a photoelectric delivery wire, at least two microgird units and a system-level dispatching center. Thefirst alternating current bus is connected into the wind power plant through the large-capacity electric transformation system, and then electric energy is transmitted to all microgrid units throughthe wind power delivery wire; the first direct current bus is connected into the photoelectric power station through the DC / DC converter, and the electric energy is transmitted to all the microgrid units through the photoelectric delivery wire. By means of the alternating current and direct current hybrid microgrid networking system, multiple microgrid units which have a poor new energy absorbingcapability can be networked, a multilayer control structure is adopted, wind / light complementation is fully utilized, support is provided for absorption of the large-capacity wind power, the capacity-expansion requirement of an electric vehicle for a power grid is met, various renewable energy sources can also be utilized to the greatest extent, the influence of new energy absorption on a large power grid is lowered, and the system reliability and stability are improved.

The invention discloses a method for determining minimum safety flow of a turbine low-pressure cylinder. The method includes: combining the static strength index and the dynamic strength index; determining the minimum safety flow of the turbine low-pressure cylinder; establishing a numerical model, analyzing a final-stage blade flow field under a small-flow working condition, analyzing final-stageblade stress and strain under the small-flow working condition, determining the minimum safety flow of the low-pressure cylinder under a static strength condition, performing modal analysis on the final-stage blade under the small-flow working condition, combining dynamic strength and static strength to determine the minimum safety flow of the low-pressure cylinder under a deep peak regulation working condition, and the like. The minimum safety flow of the low-pressure cylinder under the working condition of deep peak regulation can be rapidly and accurately determined, the problem that the minimum safety flow is not accurately determined from the flow field level or the structure side face is solved, safe and stable operation of a unit is guaranteed, the potential of deep peak regulationof the unit can be fully exerted, the wind abandoning rate is reduced, and more new energy can be generated in a grid-connected mode.

The invention discloses a combined heat and power scheduling method for improving the secondary consumption capacity of wind power, which comprises the following steps of: 1, determining a secondary wind power consumption mode, and defining a start-stop control strategy of a heat accumulating type electric boiler; 2, according to inequality constraints which should be met in the peak shaving participation process of the wind turbine generator and the thermoelectric unit, defining a feasibility coefficient to determine a unit power generation right price; 3, determining an objective function and constraint conditions in the combined heat and power dispatching model under peak load regulation right transfer; and 4, carrying out optimization solution on the combined heat and power dispatchingmodel by adopting a dynamic inertia weight and a particle swarm algorithm to achieve combined heat and power dispatching. The scheduling strategy provided by the invention can effectively reduce theintermittency and fluctuation of wind power, improve the wind power consumption and increase the benefit of an electrical comprehensive energy system.

The invention provides a risk reduction scheduling method for an electricity-gas interconnected energy system under the condition of fan failure, which is used for solving the problem of high risk forthe safe operation of the electricity-gas interconnected energy system due to the failure of a wind turbine generator set caused by faults of a power grid and the generator set in the prior art. Themethod comprises the steps of establishing a fan failure risk indicator of the electricity-gas interconnected system considering P2G based on the operation characteristics of the electricity-gas interconnected system and the fan failure risk; fully considering the constraint of an electric power system and the constraint of a natural gas system, establishing a multi-objective optimization model with the minimum risk of fan failure and the minimum coal consumption cost of a coal-fired unit so as to solve the contradiction between the risk and the coal consumption cost in the operation process of the system, thereby realizing risk reduction scheduling of the electricity-gas interconnected energy system, and improving the wind power consumption capability of the electricity-gas interconnectedsystem.

The invention discloses a micro-grid networking system applicable to high-power wind power absorption. The micro-grid networking system applicable to high-power wind power absorption comprises a micro-grid networking system, at least one wind power plant, at least one high-capacity power conversion system, an AC bus I and a special wind power transmission line, wherein the micro-grid networking system comprises at least two micro-grid units and a system-level dispatching center; the wind power plant is connected with the AC bus I by virtue of the high-capacity power conversion system; the AC bus I is connected with the special wind power transmission line; the special wind power transmission line is connected with the micro-grid units included in the micro-grid networking system; and the system-level dispatching center is connected with each micro-grid unit. According to the micro-grid networking system disclosed by the invention, the problems that the high-power wind power is difficultly absorbed, a charging load of an electric automobile has high requirements on distribution network capacity and generating capacity and the like are solved.

The invention discloses a thermal power plant combined heat and power generation and compressed air energy storage complementary integration system which comprises a thermal power plant combined heatand power generation system and an insulation compressed air energy storage system. The condition that heat load and power load supply and demand are not balanced in northern Chain can be solved, andmore reproducible electric energy is contained for internet surfing. Meanwhile, the problem that high-grade energy loss and compressor unit compression heat loss are caused since the heat supply and steam extracting parameters of a combined heat and power generation unit are too high is avoided, and cold and hot water tanks are omitted. The system is in a strong-heat weak-power state when the heatload is high and the power load is low, at the moment, a compressed air energy storage unit stores power and releases heat, and the combined heat and power generation unit and the compressed air energy storage unit can supply heat to heat consumers jointly; the system is in a strong-power weak-heat state when the power load is high and the heat load is low, and at the moment, the compressed air energy storage unit absorbs the heat from the combined heat and power generation unit and meanwhile releases heat; and at other moments, the combined heat and power generation unit works independently,and the heat and power supply capacity can be adjusted with a small range.

The invention belongs to the field of power dispatching, and particularly relates to a coal-electricity internal heat circulation system and a method for improving the wind power consumption level thereof. The constraint relation of a coal-electricityunit boiler combustion system, a high-temperature and low-temperature heat storage system and a steam power generation system is considered, a mathematical model of a steam extraction and double-heat-storage system is established, and a maximum wind power consumption optimization scheduling system is constructed. Through example simulation, the economy and the wind curtailment rate before and after steam extraction and double-heat-storage transformation are analyzed, and the influence effects of different wind power installations and heat storage capacities are compared and analyzed.

The invention provides a combined heat and power scheduling method for absorbing wind power by adopting the multi-energy storage modes. The combined heat and power dispatching method comprises the following steps: determining the composition of an electric heating comprehensive energy system; determining start-stop control strategies of a heat accumulating type electric boiler and a battery energy storage device; establishing energy consumption constraint models of a thermal power generating unit in different peak regulation stages; obtaining a combined heat and power scheduling model; improving a particle swarm algorithm; acquiring related parameters; when the wind power prediction power is larger than or equal to the wind power pre-scheduling output, starting the heat accumulating type electric boiler, and if wind curtailment exists, charging the battery energy storage device; enabling the output of the thermoelectric unit and the output of the heat accumulating type electric boiler to meet the thermal load balance requirement; after the output of the thermoelectric unit, the thermal power unit, the wind turbine generator and the battery energy storage device meets the electric balance requirement, solving the combined heat and power scheduling model by using an improved particle swarm algorithm; and outputting an optimized operation result of the combined heat and power scheduling model. According to the method, the wind curtailment rate is reduced, and the overall comprehensive target participating in scheduling is maximized.

The invention discloses a thermal power cogeneration and compressed air energy storage complementary integrated system, which includes a thermal power cogeneration system and an adiabatic compressed air energy storage system, which can simultaneously solve the problem of heat load and electric load supply and demand in the heating season in northern my country. Balanced situation, to accommodate more renewable electricity grid. At the same time, avoid high-grade energy loss caused by high heating and extraction parameters of cogeneration units, compression heat loss of compressor units, and cancel hot and cold water tanks. When the heat load is high and the electricity load is low, the system is in the state of "strong heat and weak electricity". At this time, the compressed air energy storage unit stores electricity and releases heat, and the combined heat and power unit and the compressed air energy storage Heat supply; when the electric load is high and the heat load is low, the system is in the state of "strong electricity and weak heat". At this time, the compressed air energy storage unit absorbs the heat from the cogeneration unit and releases electricity at the same time; The unit works alone, and the heating and power supply can be adjusted within a small range.

In order to overcome defects in the prior art, the invention provides a multi-time-scale wind storage combined system optimization scheduling method, which optimizes the income of a wind storage combined system on the basis of considering the blockage of a power grid channel, thereby greatly reducing the wind curtailment rate, improving the income of a wind power plant, and ensuring the safe and stable operation of a power grid. A coordinated scheduling model comprehensively considering the power grid side scheduling instruction requirement and the wind storage combined system side power generation plan is established, so that the friendliness of the wind storage combined system connected to the power grid is improved, and the wind abandoning level is reduced while the economical efficiency is improved; according to the method, the two-stage optimization scheduling model of the wind storage combined system considering safe and stable operation of the power grid forms linear programmingand mixed integer linear programming problems, and the problems can be efficiently solved by mature commercial software; the method can be widely applied to the field of energy economy calculation.

The present disclosure provides a method and system for calculating the reliability of a power system including a wind farm. By predicting the load curve of the power system, the scheduling cycle of the power system is determined, the production simulation is performed, and the starting mode of the thermal power unit is determined; the wind speed in the wind farm is predicted. information, determine the wind power, and calculate the net load value and wind abandonment rate according to the determined start-up mode of the thermal power unit; according to the production simulation, the start-up mode of the thermal power unit, the net value of the load machine and the wind power, establish the wind power forecast value-loader net value-abandonment Wind rate curve: according to the statistical results and the forced outage rate of thermal power units, perform sequential convolution according to the forced outage rate of thermal power units and the curve of predicted value of wind power - net value of load generators - curtailment rate of wind power to establish equivalent predicted value of wind power - The net value of the load machine - the wind curtailment rate curve is calculated to obtain the system reliability. The calculation process is simple and the calculation result is accurate.

The invention discloses a coordinated control method for a water hammer effect of a wind power compensation hydraulic turbine. The coordinated control method includes the steps of S1, judging whetherthe change amount of a grid frequency is greater than a given value, and if so, performing a step S2; S2, a fan responding to the change in the grid frequency, and based on a virtual inertia control link, obtaining a first compensation power reference value Pf; S3, judging whether the guide vane opening of a hydraulic turbine changes, and if so, performing a step S4; S4, the fan responding to thechange of the guide vane opening of the hydraulic turbine, and based on a new additional control link, obtaining a second compensation power reference value P[mu]; and S5, acquiring the fan compensation power reference value total amount PTe-ref according to the first compensation power reference value Pf and the second compensation power reference value P[mu]. With the coordinated method of the virtual inertial control and the new additional control, the fan sends out a power shortage for compensating the water hammer effect, the deterioration of the grid frequency is effectively suppressed,and secondary fluctuations in the grid frequency caused by the water hammer effect can be avoided.

The invention belongs to the technical field of electric power systems, and particularly relates to a centralized heat supply pipe network modeling method suitable for electricity and heat combined dispatching. The method comprises the following steps: establishing a centralized heating pipe network model; constructing an electricity and heat combined dispatching model; and obtaining a solving result according to the constructed electric heating joint scheduling model. According to the invention, electric heating energy advantage complementation is utilized to realize operation decoupling, an electric heating combined dispatching model considering pipe network thermal characteristics is constructed, influence factors such as system electric heating load, system peak load regulation capability and wind power uncertainty are comprehensively considered; on the premise of considering the operation cost and wind power consumption benefits, the optimal operation curve of each type of unit is solved, and the wind power integration space is improved. The invention can promote the utilization of comprehensive energy such as electric heating, expand the absorption way of clean energy, improve the comprehensive utilization efficiency of energy, reduce the wind curtailment rate in the heat supply period in winter and reduce the burnup cost of a unit, and has important significance under the background of large-scale concentrated grid connection of wind power.

The present invention overcomes the deficiencies in the prior art, and provides a multi-time scale wind-storage combined system optimization dispatching method. On the basis of considering grid channel blockage, the wind-storage combined system revenue is optimized, which can greatly reduce the wind curtailment rate, Improve the income of wind farms and ensure the safe and stable operation of the power grid; establish a coordination scheduling model that comprehensively considers the dispatching command requirements on the grid side and the power generation plan on the wind-storage combined system side, thereby improving the friendliness of the wind-storage combined system connected to the grid and improving Reduce the level of abandoned wind while being economical; the invention considers the safe and stable operation of the power grid. The two-stage optimal dispatching model of the combined wind storage system constitutes a linear programming and a mixed integer linear programming problem, which can be efficiently solved by mature commercial software; the invention can be widely used in Energy Economics Computing Field.

The invention provides a hybrid energy storage system control method for reducing an abandoned wind rate and tracking a wind-power planned output, which comprises the following steps: collecting a wind-power real-time power PWG (t), a wind speed v and a current planned output Pref; calculating the wind-power theoretical power PWT (t); comparing the wind-power real-time power PWG (t) and the wind-power theoretical power PWT (t), and judging whether the abandoned wind is existed; calculating sliding average Prefb; reading a battery energy storage system charge state SOC value and a super capacitor terminal voltage Uc; respectively allocating a charging and discharging power Pbess (t) of the energy storage battery and a charging and discharging power Pc (t) of a super capacitor and then correcting an actual hybrid energy storage system output PESS (t). According to the method, the hybrid energy storage system is used by combining with the wind-power generation, so that the rate of abandoned wind is lowered and the deviation of the wind-power output and planned output is reduced to improve the ability of the wind-power for tracking the wind-power planned output.

The invention provides a short-term cluster wind power prediction optimization method based on VMD-EMD-WT signal decomposition and SDAE deep learning, and the method comprises the following steps: carrying out the preprocessing of multi-dimensional NWP data and wind power plant historical power data in an original feature database, and dividing the data into a training set and a test set, using VMD, EMD and WT to decompose the wind speed and wind direction characteristic quantity of the training set to serve as a new training set, inputting the wind speed and wind direction characteristic quantity of the new training set and the test set into SDAE for deep learning, and establishing VMD-SDAE, EMD-SDAE and WT-SDAE prediction sub-models; randomly dividing output results of the three prediction sub-models into several sets, and integrating each set by using an SVM algorithm to generate a single integration result; and randomly dividing all single integration results into several sets, integrating each set by using an SVM algorithm, establishing a multi-integration learning model, and outputting a prediction result. The method has higher accuracy and better robustness, and the short-term wind power prediction precision is effectively improved.

The invention provides a hydrogen production capacity optimization and configuration method for wind power absorption and wind curtailment through a hydrogen production system. The method is characterized in that the structure and operation characteristics of the wind power hydrogen production system are analyzed, and accordingly the hydrogen production capacity optimization and configuration method for wind power absorption and wind curtailment through the hydrogen production system is disclosed. By analyzing and calculating the wind curtailment level of a wind power plant, a wind power wind curtailment duration curve is formed, a wind power annual wind curtailment power statistic model is built through the interval estimation method, the maximum economic benefit serves as the target, the optimal capacity configuration interval of the hydrogen production system is determined by means of the interval optimization theory, and a multi-attribute decision-making model is built so that the optimal electrolytic cell configuration scheme of the hydrogen production system is determined. According to the method, by means of the hydrogen production system with the optical capacity, wind power adsorption and wind curtailment are conducted through the hydrogen production system, and considerable social benefits are higher on the basis of realization of wind power plant benefits.

The invention relates to an echelon utilization energy storage system capacity configuration method for reducing wind curtailment, and the method comprises the steps: building an echelon utilization energy storage system full-life cycle cost estimation method through combining a secondary utilization process of a decommissioned power battery; under the condition that a power battery is used as an energy storage element in an echelon mode, wind power consumption income, operation benefits and environmental benefits are comprehensively considered, energy storage power constraint, energy storage capacity constraint, power balance constraint, wind curtailment power constraint and generator set output constraint are used as constraint conditions, and a capacity configuration model of the echelon utilization battery energy storage system is constructed; and according to the actual wind power data, analyzing and configuring the wind power acceptance capability of the echelon utilization energy storage system, obtaining an optimal configuration scheme of the echelon utilization energy storage system, and performing economic evaluation on the optimal configuration scheme. According to the method, the wind curtailment rate can be reduced, and operation benefits are increased. And when the initial SOC of the energy storage system is relatively low, the wind curtailment rate can be reduced.

The present invention provides a risk-reducing dispatching method for an electric-gas interconnected energy system under the failure of a wind turbine, which is used to solve the problems caused by the fault of the power grid and the failure of the unit itself in the prior art to the safe operation of the electric-gas interconnected energy system. For issues with higher risks, including based on the operating characteristics of the electrical-gas interconnection system and the failure risk of wind turbines, the establishment of fan failure risk indicators for the electrical-gas interconnection system considering P2G; fully considering the constraints of the power system and natural gas system, the establishment of the following A multi-objective optimization model with the least risk of wind turbine failure and the least coal consumption cost of coal-fired units is used to solve the contradiction between risk and coal consumption cost during system operation, so as to realize the risk-reducing scheduling of the electricity-gas interconnection energy system and improve the electricity-gas interconnection The ability of the system to absorb wind power.

The invention provides a power distribution method based on wind power and thermal power combined power generation. According to the power distribution method, adjustment of a thermal power generating unit is started by judging whether the cross section margin of grid connection point exceeds an upper limit value or a lower limit value, so that the adjustment frequency of the thermal power generating unit is reduced; under the condition that the wind power generation output is larger, the strategy that the wind power is restrained appropriately is taken into consideration, shutdown operation of the thermal power unit is not likely to happen, and harmful operation conditions of a thermal power plant are reduced; under the condition of a certain power instruction, the strategy that wind power and thermal power are delivered out in a bundled mode is adopted, wherein the priority is given to wind power during delivery, when the total generated power of the wind power and the thermal power exceeds the power instruction, reduction of the output of the thermal power unit is taken into consideration, and if when the thermal power unit operates at the minimum technical output, the total power of the wind power and thermal power stills exceeds the power instruction, the measure that a wind power plant stops wind power generation so as to enable the total delivered power to be controlled within the power instruction is taken into consideration.

The invention provides an external passage-based method for determining optimal peak-regulation installation scale of wind power. The method comprises the following steps of estimating building and running cost of a power transmission line, a wind power plant, a thermal power plant and a water pumping energy storage station according to a given ultrahigh-voltage power transmission line; giving outassembly proportion relation (maximum power) of four facilities under an initial state, supplying power to a load curve, and building an optimization model by taking minimum power utilization cost ofa terminal unit as a target; changing the proportion relation of the four facilities to obtain optimization results under different proportion relates, selecting the result with lowest terminal powercost from all optimization results, obtaining the installation scale (namely optimal peak-regulation installation scale of the wine power) of the wind power plant, the thermal power plant and the water pumping energy storage station according to a corresponding matching scheme. By building the optimization model and determining the optimal proportion of wind thermal storage and transmission, thepower utilization cost of the terminal is lowest on the premise that wind power is enabled to be utilized very well, and the wind abandon rate and the wind power terminal cost can be substantially reduced.

The invention belongs to the field of electric power dispatching, and in particular relates to an internal thermal cycle system of coal power and a method for improving the accommodation level of wind power. The invention considers the constraints of the boiler combustion system of the coal-fired power unit, the high and low temperature heat storage system, and the steam power generation system, establishes a mathematical model of the steam extraction and dual heat storage system, and constructs an optimal scheduling system for maximum wind power consumption. Through the example simulation, the economy and wind abandonment rate before and after the retrofit of steam extraction and double heat storage are analyzed, and the effects of different wind power installed capacity and heat storage capacity are compared and analyzed.

The invention discloses a thermoelectric type compressed air energy storage system and method adopting a thermoelectric unit for steam extraction and heat storage, and the system is formed by introducing an electric heating module and a steam heating module on the basis of adiabatic compressed air energy storage. The system is coupled with a combined heat and power unit and a wind turbine unit, thermoelectric decoupling of the combined heat and power unit can be achieved, wind power fluctuation can be effectively stabilized, and energy grade matching can be carried out on the macroscopic level to improve efficiency. The method has important scientific significance and practical value in the aspects of novel power system construction, dual-carbon target realization and the like.