Improved zone-3 distance protection based on adjacent relays data

Abstract

Summary A wide‐area backup protection (WABP) method is proposed in this paper based on the zone status of distance relays. The time difference between the operation of zone‐3 and wide‐area based methods makes it possible to employ wide‐area data for improvement of zone‐3. In case of zone‐3 is directly backup for zone‐1, the proposed method can decrease the time delay of zone‐3 with a complete reliability. Moreover, the proposed method is capable of discriminating between the actual faults and power system stressed conditions. Considering the operational time of wide‐area methods, the algorithm could also be applied for zone‐2 backup protection. The proposed method is also developed to consider the availability of wide‐area data for all busses within the disturbance area, as well as data missing for one or two adjacent busses, which are remarkable advantages over the existing WABP methods. Meanwhile, the wide‐area data used in the proposed method are only the pickup/release status of distance relays zones which are binary data and can be communicated readily through existing wide‐area infrastructures. Simulation results on the IEEE 57‐bus test system demonstrate the effectiveness of the proposed method as a promising WABP in improving the performance of zone‐3 in distance protection schemes.

Enhancing the reliability of six‐phase transmission line protection using power quality informatics with real‐time validation

“…As mentioned earlier, the performance of conventional protection schemes degrades during wide variation in the nonlinear loading condition, because of power quality issues. The power swing arising due to the load variation may also affect the selectivity and sensitivity of distance relay . To evaluate the performance of the proposed protection scheme in detecting and classifying a fault under varying loading condition, cases involving both variation in load (+40% to −40%) and fault have been simulated and efficacy of the proposed scheme evaluated for these cases.…”

“…The power swing arising due to the load variation may also affect the selectivity and sensitivity of distance relay. [28][29][30] To evaluate the performance of the proposed protection scheme in detecting and classifying a fault under varying loading condition, cases involving both variation in load (+40% to −40%) and fault have been simulated and efficacy of the proposed scheme evaluated for these cases. The test results depicted in Tables 4 and 5 confirm the accuracy and reliability of the proposed scheme under wide variation in linear and nonlinear loading conditions of the transmission line.…”

Transmission Line Distance Protection Algorithm Based on Bayesian Inference

“…Additionally, the authors simulated both the proposed and the differential algorithms [25] in cases featuring high-impedance (500 and 1000 [Ω]) internal faults. In these cases, the proposed method only detects faults if zone 3 (see [26,27]) is used, which yields trip times of at least 800 to 1000 [ms] [26]. Still, the differential algorithm detects high impedance faults with average trip times of 7.67 [ms].…”

Experimental platform tests for setting performances of distance protection installed in Biskra-Batna of the Algerian transmission line

“…In [4], a study is proposed to show the load model effects on distance protective relay settings in Taipower's transmission system. In [5], an improved zone-3 distance protection based on adjacent relays data is proposed, the coordination strategy is capable of discriminating between the actual faults and power system stressed conditions. In [6], a study is presented to show the effect of renewable sources on the performances of distance protection.…”