An Optimal Power Flow Model Construction Method Considering the Active Power and Voltage Regulation Capability of Wind Turbines
A technology of optimal power flow and active voltage, applied in the field of electric power enterprises, can solve problems such as zero reactive power output
Active Publication Date: 2018-12-25
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 with reference to the drawings and examples.
[0042] The construction ideas of the present invention are as follows figure 2 As shown, an optimal power flow model construction method considering the active voltage regulation capability of a wind turbine includes the following steps:
[0043] Step 1: Establish the upper and lower bounds of static voltage of each node in the whole network according to the operation requirements of the power grid;
[0044] V i.min ≤V i ≤V i.max
[0045] Where V i Indicates the voltage amplitude of the i-th node of the power grid, V i.min And V i.max Indicates the upper and lower bounds of the safe operation of the voltage amplitude of the i-th node of the power grid, generally V i.min 0.9~0.95, V i.max 1.05~1.1;
[0046] Step 2: According to the wind speed of the wind farm, obtain the active power of the current wind farm through the grid measurement system;
[0047] Step 3: Using the electri...
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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 adjustment capability of a wind turbine. Background technique [0002] In the optimal power flow of the power system, the voltage level is usually taken as an important criterion for 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 node in each time period remains within the specified range. However, as new energy sources represented by wind power are widely connected to the power grid, due to the volatility and randomness of their output, the grid-connected node voltage fluctuates or even exceeds the specified range, resulting in unqualified static voltage, which also severely limits This has improved the access and consumption of new energy sources such as wind power. [0003] At...
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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