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

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 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 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 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 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.