Method for assessing power grid wind power consumption capacity taking risks and unit combinations into account
A technology of wind power accommodation and unit combination, which is applied in wind power generation, computing, electrical components, etc., can solve problems such as wind curtailment, load shedding, and grid operating frequency deviation, so as to improve feasibility, computing efficiency, and computing time The effect of shortening
Active Publication Date: 2018-03-09
TAIYUAN UNIV OF TECH
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Problems solved by technology
When the grid-connected capacity of wind power exceeds the capacity of the grid, wind abandonment will occur, or adverse consequences such as frequency offset and load shedding will be caused to the grid operation
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[0023] The evaluation method of wind power accommodation capacity of the power grid that takes into account risks and unit combinations includes the following steps:
[0024] S1: Generate the time series curves of the output of a single wind turbine in each wind farm. Assuming that there are r wind farms that can be built, historical data is used to simulate the randomness of wind speed, wind speed data is randomly extracted from historical data, and wind speed prediction errors are taken into account to obtain the predicted time-series wind speed. Combined with the wind power output characteristic curve, each wind power The time series curve of the output of a single wind turbine in the field.
[0025] S2: Randomly generate W groups of grid-connected capacity combinations of wind farms and form a set Θ. Randomly generate W groups of r wind farm grid-connected unit number combinations, combined with the time series curves of each wind farm's single wind turbine output determi...
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The invention relates to a method for assessing wind power consumption capacity, in particular to a method for assessing power grid wind power consumption capacity taking risks and unit combinations into account. The method comprises the following steps: Step 1: generating a time series sequence curve of output power of a single wind power unit of each wind power plant; Step 2: randomly generatinga set of grid-connected capacity combinations for each wind power plant; Step 3: solving rough optimization objective function values; Step 4: determining ordinal optimization problem types; Step 5:determining a precise optimization set; Step 6: solving accurate optimization objective function values; Step 7: determining the optimal wind power consumption capacity of a power grid. The method provided by the invention takes risks and unit combinations into account, calculates and assesses the optimal capacity of multiple wind power plants connected to the power grid, and finally determines the optimal wind power consumption capacity of the power grid. The method provided by the invention can take the operational reliability and economy of the system into account, and improve the utilization rate of the new energy of the power grid, and is a prospective method for optimization assessment of the power grid wind power consumption capacity, thus providing suggestions and basis for the operation planning of a power system.
Description
technical field [0001] The invention relates to a method for evaluating wind power accommodation capacity in a power system, in particular to a method for evaluating wind power accommodation capacity of a power grid taking into account risks and unit combinations. Background technique [0002] With the rapid growth of wind power grid-connected capacity, the curtailment rate of wind power has been increasing due to constraints such as grid security and stability. In 2016, the curtailment rate of my country's Xinjiang, Gansu and other provinces has reached more than 42%. In order to ensure the investment income of wind farms, the state has introduced corresponding policies to slow down the progress of wind power construction in areas with high wind curtailment rates, but how much wind power should be approved in order to ensure the increase in my country's new energy grid-connected capacity and at the same time increase the capacity of wind power. Utilization rate has become an...
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IPC IPC(8): H02J3/38G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/0639G06Q50/06H02J3/386H02J2203/20Y02A90/10Y02E10/76Y02P90/82Y04S10/50
Inventor 贾燕冰付可宁韩肖清王英王鹏梁琛
Owner TAIYUAN UNIV OF TECH