摘要
当电网电压发生对称跌落时,因光照强度不变,使得光伏系统发出的电量不发生变化,从而会在逆变器直流侧堆积大量的电能,若不采取相应的措施,会对逆变器造成严重的损害。为了把直流侧多余的能量吸收掉,在直流侧加入了超级电容储能系统。逆变器采用电网电压定向的矢量控制,并且与超级电容储能系统相配合来维持直流母线电压稳定,同时逆变器发出相应的无功功率来支撑并网点电压,从而更好地实现低电压穿越。最后在MATLAB/SIMULINK仿真软件中搭建了12k W的带有超级电容储能系统的光伏并网系统并进行仿真验证,从仿真结果来看,方法是正确的。
When the grid voltage is dropped symmetrically, the light intensity is not changed, so thatthe electric quantity emitted by the photovoltaic system does not change, making a large amount ofelectric energy accumulated on the direct current side of the inverter, and if corresponding measures arenot taken, serious damage is caused to the inverter. In order to absorb the excess energy from the DCside, a super capacitor energy storage system is added to the DC side. The inverter adopts vector controlof grid voltage orientation and is matched with a super capacitor energy storage system to maintain thevoltage stability of a direct current bus, while sending out corresponding reactive power to support theparallel grid voltage, so as to better realize the low voltage crossing. At last, a 12 kW photovoltaic gridconnectedsystem with super capacitor energy storage system is built in MATLAB ∕ Simulink simulationsoftware and the simulation results show that the method is correct.
出处
《微处理机》
2018年第1期48-52,共5页
Microprocessors
