High penetration of distributed generation (DG) results in technical problems as voltage rise, voltage unbalance, substation reverse power, and transformer overloading. These problems adversely affect the connectivity of DGs either in the planning stage by decreasing the number of connected DGs, or in the operation stage by applying DGs’ active power curtailment (APC). This paper presents a techno-economic approach for the enhancement of photovoltaic (PV) DGs connectivity. The proposed approach first employs a probabilistic economic technique for determining the non-curtailable portion of the PV DG power that ensures profitable DG investment. This portion is integrated, as an economic constraint, in the planning phase of the proposed approach that aims to maximize the number of PV DGs connected to the system. In the operation phase, the proposed approach utilizes the capabilities of the existing equipment on the system, i.e., regulators, capacitors, DGs reactive power, and DGs APC to mitigate all technical problems. The overall objective of this stage is to minimize the total DGs APC while fulfilling all technical and economic constraints. The proposed approach is tested on the modified IEEE 123-bus feeder. The results clarify the efficiency of the proposed techniques in increasing the connectivity of PV DGs while maintaining profitable DG project.

中文翻译：

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增加光伏分布式发电机连接性的技术经济方法

分布式发电（DG）的高渗透率会导致技术问题，例如电压升高，电压不平衡，变电站反向功率和变压器过载。这些问题在规划阶段通过减少连接的DG的数量或在运行阶段通过应用DG的有功功率削减（APC）会对DG的连通性产生不利影响。本文提出了一种技术经济的方法来增强光伏（PV）DG的连接性。所提出的方法首先采用概率经济技术来确定PV DG电力的不可削减部分，以确保可观的DG投资。作为经济约束，这部分内容已整合到所建议方法的规划阶段，该阶段旨在最大化连接至系统的PV DG的数量。在操作阶段，建议的方法利用了系统上现有设备的功能，即调节器，电容器，DG的无功功率和DG的APC来缓解所有技术问题。该阶段的总体目标是在满足所有技术和经济约束的同时，将总危险品的APC降至最低。在改进的IEEE 123总线馈线上测试了所提出的方法。结果表明，在保持盈利的DG项目的同时，提出的技术在提高PV DG的连通性方面的效率。在改进的IEEE 123总线馈线上测试了所提出的方法。结果表明，在保持盈利的DG项目的同时，提出的技术在提高PV DG的连通性方面的效率。在改进的IEEE 123总线馈线上测试了所提出的方法。结果表明，在保持盈利的DG项目的同时，提出的技术在提高PV DG的连通性方面的效率。