可靠性与经济性协调的输电线路最大利用率评估方法

孙腾飞; 程浩忠; 张立波; 周勤勇; 贺海磊; 曾平良

doi:10.3969/j.issn.1000-7229.2016.06.011

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电力建设 ›› 2016, Vol. 37 ›› Issue (6) : 70-78. DOI: 10.3969/j.issn.1000-7229.2016.06.011

理论研究

可靠性与经济性协调的输电线路最大利用率评估方法

孙腾飞1，程浩忠1，张立波1，周勤勇2，贺海磊2，曾平良2

作者信息 +

A Load-Carrying Capacity Evaluation Method of Transmission Line Based on Economy and Reliability Coordination

SUN Tengfei1， CHENG Haozhong1， ZHANG Libo1， ZHOU Qinyong2， HE Hailei2， ZENG Pingliang2

Author information +

文章历史 +

摘要

电网运行由于受各种因素制约，若仅以可靠性作为判据进行评估，则输电线路最大利用率处于较低水平。针对这一问题，通过对年持续负荷曲线的分析，提出一种基于经济性与可靠性协调的输电线路最大利用率评估方法，通过协调电力系统可靠性与经济性，得出现有线路年平均利用率真正能够达到的最高水平。评估中首先计算系统满足可靠性约束的年最大负荷，进而对持续负荷曲线超过年最大负荷部分作为过负荷切除，并按照可中断负荷方式给予切负荷赔偿；对于年持续负荷曲线中保留部分，针对其电量不足期望值给予停电损失赔偿。二者共同组成可靠性的经济代价，将其增长速度与电网售电带来的经济效益增速比较，只要可靠性的经济代价增速更慢，评估中系统最大年利用率就仍有提升空间。将该方法应用于IEEE RTS79系统，结果表明此评估方法较传统安全评估结果更高，能够进一步开发线路利用空间，充分利用输电线路的可用容量。

Abstract

The power system operation is constrained by a multitude of factors， and the load-carrying capacity is relatively low if only with reliability as the criterion for evaluation. Aiming at the problem， through the analysis of the annual duration load curve， this paper proposes the maximum load-carrying capacity evaluation method of transmission line based on economy and reliability coordination. By coordinating the reliability and economy of power system， the annual average load-carrying capacity of existing lines can achieve the highest level. In the evaluation， the annual maximum load of the system meeting the reliability constraint is firstly calculated. Then the parts on duration load curve that are greater than the annual maximum are cut as overloads， and load-cutting compensation is given according to the way of interruptible load. Besides， customers also get compensation from the reserved parts on duration load curve as outage cost based on expected energy not supplied （EENS）. The growth of economic costs of reliability composed of the these two compensations are compared with the economic efficiency growth brought by electricity sale of grid， whose result shows that as long as the growth of economic costs of reliability is relatively lower， there will be still likelihood for the improvement of the maximum annual load-carrying capacity in evaluation system. The proposed method is applied in IEEE RTS 79 system， and the result shows that this evaluation method has higher results than those of traditional security assessment， which can further develop the utilization of lines and make full use of the available capacity of transmission line.Symbol`@@

导出引用

孙腾飞, 程浩忠, 张立波, 周勤勇, 贺海磊, 曾平良. 可靠性与经济性协调的输电线路最大利用率评估方法[J]. 电力建设. 2016, 37(6): 70-78 https://doi.org/10.3969/j.issn.1000-7229.2016.06.011

SUN Tengfei, CHENG Haozhong, ZHANG Libo, ZHOU Qinyong, HE Hailei, ZENG Pingliang. A Load-Carrying Capacity Evaluation Method of Transmission Line Based on Economy and Reliability Coordination[J]. Electric Power Construction. 2016, 37(6): 70-78 https://doi.org/10.3969/j.issn.1000-7229.2016.06.011

中图分类号： TM 71

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