Distributed Energy Resources (DERs) have disrupted the traditional electrical system. Grid-connected photovoltaic (PV) systems deliver electric energy closer to the consumer, shifting the paradigm from centralized to distributed generation. The impact of the stochastic PV output power gives rise to potentially rapid voltage fluctuations. Reactive power compensation is needed to regulate the voltage profile to meet the relevant standards. Traditional approaches like switched capacitors cannot provide reactive power that is continuously adjustable at short time scales. This paper examines an alternative distribution static synchronous compensator (D-STATCOM) based on a matrix converter (MC) for the low voltage distribution networks with high PV penetration. This technology can extend service life by using inductors for energy storage. The converter being studied provides ancillary services, including reactive power support; the impact on reliability, operational constraints, and electrical behavior is demonstrated. The contribution of this paper is a detailed analysis and impact study of the capacitor-less D-STATCOM in high PV penetration distribution networks. The significance of this paper is that it studies the behavior of the power electronics converter and its interaction with the power systems without assuming or neglecting details of either. Compensation effects and reliability comparisons between the proposed capacitorless D-STATCOM and the incumbent D-STATCOM technology are also studied in this paper.

中文翻译：

---

无电容器 D-STATCOM 对高光伏渗透配电网电压分布改善的分析

分布式能源 (DER) 颠覆了传统的电力系统。并网光伏 (PV) 系统将电能输送到离消费者更近的地方，将范式从集中式发电转变为分布式发电。随机 PV 输出功率的影响会导致潜在的快速电压波动。需要无功功率补偿来调节电压曲线以满足相关标准。像开关电容器这样的传统方法不能提供在短时间内连续可调的无功功率。本文研究了一种基于矩阵转换器 (MC) 的替代配电静态同步补偿器 (D-STATCOM)，用于具有高 PV 渗透率的低压配电网络。该技术可以通过使用电感器进行储能来延长使用寿命。正在研究的变流​​器提供辅助服务，包括无功功率支持；展示了对可靠性、操作限制和电气行为的影响。本文的贡献是对高光伏渗透配电网络中无电容器 D-STATCOM 的详细分析和影响研究。本文的意义在于它研究了电力电子转换器的行为及其与电力系统的相互作用，而不假设或忽略任何一个细节。本文还研究了所提出的无电容器 D-STATCOM 与现有 D-STATCOM 技术之间的补偿效果和可靠性比较。本文的贡献是对高光伏渗透配电网络中无电容器 D-STATCOM 的详细分析和影响研究。本文的意义在于它研究了电力电子转换器的行为及其与电力系统的相互作用，而不假设或忽略任何一个细节。本文还研究了所提出的无电容器 D-STATCOM 与现有 D-STATCOM 技术之间的补偿效果和可靠性比较。本文的贡献是对高光伏渗透配电网络中无电容器 D-STATCOM 的详细分析和影响研究。本文的意义在于它研究了电力电子转换器的行为及其与电力系统的相互作用，而不假设或忽略任何一个细节。本文还研究了所提出的无电容器 D-STATCOM 与现有 D-STATCOM 技术之间的补偿效果和可靠性比较。