Optimal power flow model construction method considering active power voltage regulation capacity of wind turbine generator set
An optimal power flow, active voltage technology, applied in the field of electric power enterprises, can solve problems such as zero reactive power output
Active Publication Date: 2017-05-24
STATE GRID CORP OF CHINA +2
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Problems solved by technology
However, in the face of the electrical structural constraints of the wind turbine, when the active power of the wind turbine is at the maximum value, its reactive power output is almost zero due to the limitation of the inverter capacity
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[0041] The present invention will be further described below in conjunction with accompanying drawings and examples.
[0042] The construction thinking of the present invention is as figure 2 As shown in , an optimal power flow model construction method considering the active voltage regulation ability of wind turbines includes the following steps:
[0043] Step 1: According to the operation requirements of the power grid, establish the upper and lower bound constraints of the static voltage of each node in the whole network;
[0044] V i.min ≤V i ≤V i.max
[0045] Among them, V i Indicates the voltage amplitude of the i-th node of the power grid, V i.min and V i.maxIndicates the upper and lower bounds of the safe operation of the voltage amplitude of the i-th node of the power grid, generally taken as V i.min 0.9~0.95, V i.max 1.05~1.1;
[0046] Step 2: Combined with the wind speed of the wind farm, obtain the active power of the current wind farm through the grid ...
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The invention discloses an optimal power flow model construction method considering the active power voltage regulation capacity of a wind turbine generator set. According to the method, the electrical structure constraint of the wind turbine generator set is considered, so that the active power voltage regulation capacities of the wind turbine generator set under specific operating conditions can be obtained; and based on the specific active power voltage regulation capacities, a secondary penalty function mode is adopted to realize the active power voltage regulation of the wind turbine generator set. The optimal power flow model of the active power voltage regulation capacities of the wind turbine generator set is constructed; according to the optimal power flow model, a formula about wind turbine generator set active power voltage regulation is added for the objective function; the active power voltage regulation of the wind turbine generator set can satisfy static voltage constraint; the model is utilized to optimize the operating states of electric components in a power grid; effective control on the static voltage of grid nodes can be realized; and some nodes can be prevented from being subjected to excessive voltage deviation.
Description
technical field [0001] The invention belongs to the technical field of electric power enterprises, and relates to a method for constructing an optimal power flow model considering the active voltage regulation capability of a wind turbine. Background technique [0002] In the optimal power flow of power system, the voltage level is usually taken as an important criterion of the static index of the system. It is generally believed that the system voltage can be considered qualified as long as the operating voltage of the grid nodes is kept within the specified range in each period of time. However, as new energy such as wind power is widely connected to the power grid, due to the fluctuation and randomness of its output, the voltage of grid-connected nodes will fluctuate or even exceed the specified range, resulting in unqualified static voltage, which also severely limits The integration and consumption of new energy sources such as wind power. [0003] At present, most wi...
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IPC IPC(8): H02J3/06H02J3/48
CPCH02J3/06H02J3/48H02J2203/20Y02E10/76
Inventor 沈阳武崔挺张斌熊尚峰柯德平张辰沈非凡向萌罗潇
Owner STATE GRID CORP OF CHINA