Local control strategy of PV inverters for overvoltage prevention in low voltage feeder
Local control strategy of PV inverters for overvoltage prevention in low voltage feeder
复制标题
低压馈线防过压光伏逆变器就地控制策略
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Xiangdong Sun
中科院分区：
文献类型：
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作者：
Biying Ren;Meng Zhang;Shao;Xiangdong Sun
随着分布式光伏发电在低压配电网中的高度普及，在配电网馈线中产生过电压。因此，本文分析了分布式光伏发电对辐射状低压电网电压的影响。提出了各光伏变流器局部电压自调节控制策略，以防止过电压，提高高磁导率。通过检测公共耦合点（PCC）电压及其输出无功功率，光伏变流器可以在三种模式下运行。这三种模式分别是最大功率点跟踪和单位功率因数、最大功率点跟踪和恒功率因数、极限功率跟踪和恒电压。基于所设计的控制策略，建立了多分布式光伏发电的低压电网模型。仿真结果表明了该方案的有效性。
With the high penetration of distributed photovoltaic(PV) generations in low voltage (LV) distribution network, it causes overvoltage in feeder. Therefore, in this paper, impaction on voltage in radial LV grid for distributed PV generations is analyzed. Local voltage self-regulating control strategy of each PV converter to prevent overvoltage and improve the high permeability is proposed. The PV converter control can operate under three patterns based on the detecting the voltage at point of common coupling(PCC) and its output reactive power. The three patterns include PV maximum power point tracking(MPPT) and unity power factor(PF), PV MPPT and constant PF, PV limiting power tracking and constant voltage. Based on the designed control strategy, the low voltage network with multi-distributed PV generation model is built. Simulation results demonstrate that the proposed scheme is effective.