A Study on Short-Circuit-Ratio for an Inverter-Based Resource With Power-Voltage Curves

被引：4

作者：

Yamada, Yasuaki ^{[1
]}

Tsusaka, Akihiro ^{[1
]}

Nanahara, Toshiya ^{[1
]}

Yukita, Kazuto ^{[1
]}

机构：

[1] Aichi Inst Technol, Toyota, Aichi 4700392, Japan

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 2024年 / 39卷 / 04期

关键词：

Inverters; Reactive power; Power system stability; Voltage; Nose; Mathematical models; Resistance; Distributed power generation; inverters; power distribution; power system control; reactive power control; voltage control; power voltage curves; short circuit capacity; system strength;

D O I：

10.1109/TPWRS.2023.3347574

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The article examines a minimum short-circuit-ratio (SCR) for a single-inverter infinite-bus system using power-voltage curves. It derives a steady-state equation between the apparent power and terminal voltage of a current-control type inverter. By normalizing the apparent power with short-circuit-capacity and voltage with that of the infinite bus, the equation proves to be determined with a single parameter, which is calculated with the R/X ratio of the looking-back impedance and the power factor of an inverter. The obtained equation gives a theoretical background on SCR as a metric to assess voltage stability. The minimum SCR is then evaluated for the nose of the power-voltage curves while considering constraints on the inverter terminal voltage. The results reveal that the SCR for an inverter with a constant power factor control has to be greater than about 2. If the reactive power of an inverter is controlled in accordance with its output power, the SCR has to be greater than about 1.

引用

页码：6076 / 6086

页数：11

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