Scheduling method of combined power system with wind power participating in backup
A dispatching method and power system technology, applied in wind power generation, circuit devices, AC network circuits, etc., can solve the problems of down-regulation and reserve, and the inability of wind farms to provide up-regulation reserve for the power system, so as to achieve the effect of improving economic benefits.
Active Publication Date: 2019-03-15
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
[0003] The present invention aims at the disadvantages of the prior art that the wind farm cannot provide up-regulation backup and down-regulation backup for the power system, and cannot realize joint optimization of power generation between the wind farm and the thermal power plant from the perspective of economic operation of the power system, and proposes a joint power system in which wind power participates in backup The dispatching method combines wind turbines and thermal turbines to make wind turbines run in a suboptimal state, so that the combined power system as a whole operates in a state that is better than the full wind power generation, and wind power can operate within a certain safety margin. Provide up-regulation reserve and down-regulation reserve for the system within the range
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[0021] like figure 1 As shown, this embodiment includes the following steps:
[0022] Step 1. Read the initialization data of the combined power system and the operating parameters of the unit, calculate the wind power reserve capacity of the wind turbine, set the convergence value ε, set the dispatch period and the demanded amount of the wind power dispatch plan, and list the objective function of the wind power dispatch with corresponding constraints.
[0023] The convergence value ε in this embodiment is taken as 1% in consideration of accuracy and computational complexity.
[0024] The initialization data of the combined power system includes data such as the upper and lower limits of the output of the unit, the ramp rate, and the predicted output of the wind farm.
[0025] The operating parameters of the unit include the generation cost curve C of each unit G,i , Control cost curve C of carbon dioxide emission E,i and start-stop fee S i .
[0026] The wind power res...
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Provided is a scheduling method for participation of wind power in providing standby for a united electric power system. The method comprises steps of firstly, calculating wind power standby capacity of a wind turbine generating unit of the united electric power system; according to an operation parameter of the system, constructing a wind power scheduling model; by combining a set parameter, solving a planning value of to-be-solved quantity of a wind power full output scheduling plan; by combining the wind power standby capacity and the planning value of the wind power full output scheduling plan, adding corresponding constrains according to an adopted wind power scheduling strategy and carrying out iteration optimization so as to obtain an updated planning value; and re-setting a wind power scheduling plan and a thermal power scheduling plan in a scheduling period, and carrying out execution through the wind turbine generating unit and a thermal power generating unit, wherein the to-be-solved quantity is output of a wind power plant, the output of a thermal power plant and an operation states at a certain moment. According to the invention, by adopting a wind power standby and economical scheduling strategy, and using the standby capability of the wind power, standby is provided for the system and operation economical performance of the system is improved.
Description
technical field [0001] The invention relates to a technology in the field of wind power dispatching, in particular to a dispatching method of a combined power system in which wind power participates in standby. Background technique [0002] At present, the research on wind power consumption mainly focuses on two aspects: reliability and economy. In terms of economy, the system backup and environmental benefits are taken as the cost of wind power generation, and the short-term dispatch problem after wind power is integrated into the grid is studied. In terms of reliability, a large number of literatures have been studied from two perspectives: wind power combined with other energy sources to improve reliability and power system backup optimization. On the one hand, wind energy, water energy, solar energy, natural gas, and energy storage units are integrated to coordinate and optimize different energy sources, stabilize mutual fluctuations, and reduce the impact on the power ...
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IPC IPC(8): H02J3/46
CPCH02J3/46H02J2203/20Y02E10/76
Inventor 余墨多黄文焘邰能灵郑晓冬宁连营
Owner SHANGHAI JIAOTONG UNIV