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首页> 外文期刊>Smart Grid, IEEE Transactions on >Optimal Protection Coordination for Meshed Distribution Systems With DG Using Dual Setting Directional Over-Current Relays
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Optimal Protection Coordination for Meshed Distribution Systems With DG Using Dual Setting Directional Over-Current Relays

机译：具有双重设置方向性过电流继电器的带有DG的网状配电系统的最佳保护协调

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摘要

In the presence of distributed generation (DG), it is important to assure a fast and reliable protection system for the distribution network to avoid unintentional DG disconnection during fault conditions. In this paper, dual setting directional over-current relays are proposed for protecting meshed distribution systems with DG. Dual setting relays are equipped with two inverse time-current characteristics whose settings will depend on the fault direction. The protection coordination problem for the dual setting directional relay is formulated as a nonlinear programming problem where the objective is to minimize the overall time of operation of relays during primary and backup operation. The proposed protection coordination scheme using dual setting relays is compared against the conventional approach, which relies on the conventional one setting directional relay. The proposed scheme is applied to the power distribution network of the IEEE 30-bus system equipped with synchronous and inverter-based DG. The results show that the proposed protection coordination scheme with dual setting relay can significantly reduce the overall relay operating time, making it an attractive option for distribution systems with DG.
机译：在存在分布式发电（DG）的情况下，重要的是要确保为配电网络提供快速可靠的保护系统，以避免在故障情况下意外断开DG。在本文中，提出了一种双设定方向过流继电器，用于保护带有DG的网状配电系统。双设定继电器具有两个反时限电流特性，其设定将取决于故障方向。双设定方向继电器的保护协调问题被表述为一个非线性规划问题，其目的是使一次和备用运行期间继电器的总体运行时间最小化。将所提出的使用双设定继电器的保护协调方案与传统方法进行了比较，传统方法依赖于传统的一个设定方向继电器。所提出的方案被应用于配备有同步和基于逆变器的DG的IEEE 30总线系统的配电网络。结果表明，所提出的双设定继电保护协调方案可以显着减少继电器的总体运行时间，使其成为具有DG的配电系统的有吸引力的选择。

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