Nowadays, the power system is characterized by a conglomeration of ultra and extra-high voltage AC and DC transmission corridors, multi-terminal DC (MTDC), and a new generation having Ultra Mega Power Plants (UMPP). It consists of a large power transmission and distribution network across the country along with old conventional generating units and insertion of Renewable Energy Sources (RES). The System Integrity and Protection Schemes (SIPS) play a crucial role in maintaining a secure and reliable grid and assist in effective grid management during severe power system contingencies. In this article, the operational experiences of three prime important SIPS in India are presented. The demerits in existing SIPS are pointed out and a methodology is proposed to overcome them. The performance and effectiveness of the proposed methodology are evaluated by simulation studies on the 39-bus New England system nested with the HVDC link in MATLAB. Simulation results confirmed the authenticity of a proposed methodology in preserving system integrity. Results are validated using Electrical Transient Analyzer Program (ETAP), which is a very powerful design and analysis tool and has an extremely user-friendly interface.

如今，电力系统的特征是超高压和超高压交流和直流输电走廊，多端子直流（MTDC）以及具有超大型电厂（UMPP）的新一代的聚集。它由遍布全国的大型输配电网络以及老式的常规发电机组和可再生能源（RES）组成。系统完整性和保护计划（SIPS）在维护安全可靠的电网以及在严重的电力系统突发事件中协助有效的电网管理方面发挥着至关重要的作用。本文介绍了印度三个重要的重要SIPS的运营经验。指出了现有SIPS的缺点，并提出了克服这些缺点的方法。通过在MATLAB中以HVDC链接嵌套的39总线新英格兰系统的仿真研究，对所提出方法的性能和有效性进行了评估。仿真结果证实了所提方法在保持系统完整性方面的真实性。使用电气瞬态分析仪程序（ETAP）验证结果，该程序是功能非常强大的设计和分析工具，并且具有非常友好的用户界面。