摘要详情

ID / 提交时间

26 / 2023-09-21 16:01:40

标题

Online monitoring of primary frequency regulation capability of high-proportion new energy power system

关键字

new energy; different frequency modulation resources; primary frequency modulation capability; online monitoring

主题及专题

1.Renewable energy system > (2)、Renewable energy system planning, design, and operation

状态

全文被拒

作者

Pei Yi / State Grid Wuxi Power Supply Company

摘要

At present, high-proportion new energy power system has become the mainstream trend. Due to the gradual increase of frequency instability accidents, the power system frequency safety problem is prominent. It is urgent to master the true primary frequency modulation capability of heterogeneous frequency modulation resources, and to monitor the system's ability to withstand power disturbances online. This paper introduces the primary frequency modulation capability of the unit by utilizing the adjusted power at the frequency extreme point and the electrical power change at steady state. Similarly, the primary frequency modulation capability of the system is determined by considering the sum of the electrical power change of all units and load at the frequency extreme point and steady state. Additionally, a novel approach is presented to estimate the primary frequency modulation capability indexes through the construction of a first-order inertial frequency difference curve.The examples prove that the proposed method can accurately evaluate the primary frequency modulation capability of the units and the system, and can be applied to the online monitoring system to ensure the frequency safety of the system.