With the evolution of smart grid system (SGS), many issues associated with traditional grid network, i.e., power system security, monitoring and control, energy efficiency and aging of system’s equipment are resolved. The smart system is flexible enough to integrate many DGs without violating its hosting capacity. However, during and after the integration of DGs into SGS, still many other technical problems exist in the system especially islanding and stability of system. This research proposes a modified Thevenien Equivalent model for voltage stability analysis of smart grid system. With the help of phasor measurement units (PMUs), the data is collected globally and thus voltage stability margin is determined. The dS/dV algorithm is then used to determine voltage stability at all the system nodes. The proposed scheme also provides online monitoring and control of voltage stability of Smart Grid System and results in a new efficient and economical anti-islanding technique based on WSNs. Since, WSNs are already being distributed along the entire structure of Smart Grid Systems for effective communication but can also be used as sensor nodes to record the changes in system voltage and its angle, called sag calculations. The data from sensor nodes, with the help of routing nodes will be then transferred to SCADA center for operating respective circuit breaker of affected DG wirelessly. Power-Hardware-In-Loop setup is used to validate the efficacy of propositions. The analysis is carried for normal as well as for faulty conditions.

随着智能电网系统（SGS）的发展，解决了与传统电网相关的许多问题，例如电力系统安全，监视和控制，能效和系统设备的老化。智能系统足够灵活，可以集成许多DG，而不会破坏其托管能力。但是，在将DG集成到SGS期间和之后，系统中仍然存在许多其他技术问题，特别是系统的孤岛和稳定性。本研究提出了一种改进的Thevenien等效模型，用于智能电网系统的电压稳定性分析。借助相量测量单元（PMU），可全局收集数据，从而确定电压稳定裕度。然后使用dS / dV算法确定所有系统节点上的电压稳定性。该方案还提供了智能电网系统电压稳定性的在线监测和控制，并导致了一种基于WSN的高效，经济的新型防孤岛技术。因为，WSN已经在智能电网系统的整个结构中分布，以进行有效的通信，但也可以用作传感器节点来记录系统电压及其角度的变化，称为下垂计算。来自传感器节点的数据将在路由节点的帮助下被传输到SCADA中心，以无线方式操作受影响的DG的各个断路器。强大的硬件在环设置用于验证命题的有效性。进行正常和故障情况的分析。