Simulation evaluation model of high voltage ride-through capability and simulation evaluation method based on it
An evaluation model and high-voltage technology, which is applied in design optimization/simulation, electrical components, control generators, etc., can solve problems such as high cost, complicated test process, undocumented high-voltage ride-through ability simulation evaluation method, etc., to save testing cost effect
Active Publication Date: 2019-12-03
GUODIAN UNITED POWER TECH
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Problems solved by technology
In the prior art, high-voltage ride-through mobile test equipment vehicles are mainly used to test the high-voltage ride-through capability of wind turbines on site. The test process is complicated and the cost is high.
In the prior art, there is a simulation evaluation method for low-voltage ride-through capability of wind turbines, but there is no simulation evaluation method for high-voltage ride-through capability
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Embodiment Construction
[0032] see figure 2 As shown, the present invention provides a simulation evaluation model of high-voltage ride-through capability, including aerodynamic model, torque control model, converter model and high-voltage fault occurrence equipment model of wind turbines connected in sequence.
[0033] Among them, the aerodynamic model of the wind turbine is used to calculate the airflow input power P according to the input initialization evaluation parameters m ,Calculated as follows:
[0034]
[0035] Among them, P m Input power for the air flow, π is the circumference ratio, r b is the blade length of the wind turbine, v w is the wind speed, ρ is the air density, λ is the blade tip speed ratio, that is, the ratio of the blade tip linear speed to the wind speed, w b is the wind turbine blade angular velocity, β is the blade pitch angle, c p is the availability of wind energy.
[0036] Wind energy availability c p The empirical values are shown in the table below:
[...
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The invention discloses a high-voltage ride-through capability simulation evaluation model, which includes a sequentially connected wind turbine aerodynamic model, torque control model, converter model, and high-voltage fault-occurring equipment model; the wind turbine aerodynamic model is used to calculate air flow Input power; torque control model, used to calculate rotor electromagnetic torque according to airflow input power; high-voltage fault occurrence equipment model, used to simulate high-voltage faults and output a given voltage on the low-voltage side of the transformer; converter model, used to Calculate the stator reactive current, active power and reactive power of the wind turbine during the high voltage fault process according to the input power of the air flow, the electromagnetic torque of the rotor and the given voltage on the low voltage side of the transformer. The invention also discloses a high-voltage ride-through ability simulation evaluation method based on the above model. The invention can simulate a high-voltage fault, evaluate the operation state of the wind turbine during the failure process, and verify whether the wind turbine has the capability of high-voltage ride-through.
Description
technical field [0001] The invention relates to the technical field of wind power generating sets, in particular to a high-voltage ride-through capability simulation evaluation model and a simulation evaluation method based on the model. Background technique [0002] Previously, the China Electric Power Research Institute took the lead in proposing the test procedure for the fault ride-through capability of wind turbines (working discussion draft). The following are the specific requirements for the high-voltage ride-through capability of wind turbines in the procedure: [0003] The wind turbine should have the ability to operate continuously without disconnecting from the grid within the specified voltage and time range, and quickly realize power recovery after the voltage returns to normal. During the fault period, the wind turbine should provide inductive reactive current support to assist the grid voltage recovery. Specific requirements are as follows: [0004] A) When ...
Claims
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IPC IPC(8): G06F17/50G06Q50/06
CPCG06Q50/06G06F30/20G06F2113/06G06F2111/10H02P9/107
Inventor 褚景春陈文超王晓丹焦冲谢法杜雯姜德旭蔺雪峰王千
Owner GUODIAN UNITED POWER TECH