高电压故障穿越仿真测试技术研究

Research on High Voltage Fault Ride-Through Simulation Testing Technology

基于硬件在环仿真测试平台,采用阻抗、阻容分压原理开展高、低电压故障穿越测试是检验新能源场站发电单元电压耐受能力的重要技术手段。随机投入阻容升压支路易导致并网点电压骤降,进而触发低电压穿越逻辑,降低高电压故障穿越测试效率。为此,提出阻容升压支路柔性投退控制策略及控制策略集成建模方法,实现高电压故障一键顺控模拟,提升了测试效率。仿真结果表明,所提方法可以准确、有效、快速完成高电压故障模拟。

Based on the HIL simulation testing platform,conducting high voltage fault ride-through and low voltage fault ride-through tests using the impedance voltage division principle is an important technical means to test the voltage tolerance ability of power generation units in new energy power plants.It connects randomly the resistor-capacitor boosting branch in parallel and can easily cause a sudden drop in the grid voltage at the point of connection,thereby triggering low voltage ride-through logic and reducing the efficiency of high voltage fault ride-through testing.It proposes a flexible switching control strategy and integrated modeling method for resistor-capacitor boosting branch,enabling one-click sequential control simulation of high voltage faults and improving testing efficiency.The simulation results show that the proposed method can complete the high-voltage fault simulation.