计及负荷等效惯量的新型电力系统机组组合安全优化方法

宋嘉雯; 王琦; 王亚伦; 夏宇翔; 汤奕

doi:10.12204/j.issn.1000-7229.2025.09.009

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电力建设 ›› 2025, Vol. 46 ›› Issue (9) : 111-119. DOI: 10.12204/j.issn.1000-7229.2025.09.009

调度运行

计及负荷等效惯量的新型电力系统机组组合安全优化方法

宋嘉雯 ¹ ,
王琦 ¹ ,
王亚伦 ¹ ,
夏宇翔 ² ,
汤奕 ¹

作者信息 +

Security Optimization Method for Unit Commitment in New Power Systems Considering Load Equivalent Inertia

SONG Jiawen ¹ ,
WANG Qi ¹ ,
WANG Yalun ¹ ,
XIA Yuxiang ² ,
TANG Yi ¹

Author information +

文章历史 +

摘要

【目的】随着新型电力系统建设推进，新能源机组逐步替代传统火电机组，电源侧惯量水平持续下降，负荷侧的频率惯量支撑作用愈发重要。因此，有必要在常规机组组合优化中进一步考虑源荷两侧的惯量协同优化配置。【方法】首先分析了负荷侧的等效惯量支撑能力，提出了考虑负荷惯量响应策略的系统惯量计算方法。在此基础上，提出了基于系统初始频率变化率和频率最低点的最小惯量评估方法，并针对所提负荷响应策略和最小惯量评估结果，建立机组组合安全优化模型。【结果】算例结果表明，所提方法在满足系统频率安全约束的同时，降低系统对常规机组惯量的依赖，优化系统源荷惯量资源配置，从而在确保电网安全运行的前提下，显著提升系统的整体运行经济性。【结论】负荷侧可控资源通过其快速响应能力可为电力系统提供灵活的等效惯量支撑，有效缓解频率跌落问题，降低系统运行成本。

Abstract

[Objective] With the advancements in the construction of new power systems， renewable energy units are gradually replacing traditional thermal power units. The inertia level on the generation side continues to decline， and the frequency of the inertial support on the load side is becoming increasingly important. Therefore， it is necessary to incorporate coordinated inertia optimization between generation and load sides into conventional unit commitment processes. [Methods] In this study， the equivalent inertial support capacity of the load side was theoretically analyzed， and a calculation method for the system inertia considering load inertial response strategies was proposed. Building on this foundation， a method for assessing the minimum inertia based on the initial rate of frequency change and frequency nadir was proposed. An optimal unit commitment safety model was established based on the proposed load-response strategy and minimum inertia assessment results. [Results] Case studies demonstrated that the proposed method can satisfy system frequency security constraints， while reducing the reliance on conventional unit inertia and optimizing the allocation of inertial resources between the generation and load sides. Consequently， the overall operational economy of the system was significantly improved without compromising grid security. [Conclusions] Controllable resources on the load side can provide flexible equivalent inertia support through their rapid response capabilities， effectively mitigating frequency decline and reducing system operating costs.

导出引用

宋嘉雯, 王琦, 王亚伦, 等. 计及负荷等效惯量的新型电力系统机组组合安全优化方法[J]. 电力建设. 2025, 46(9): 111-119 https://doi.org/10.12204/j.issn.1000-7229.2025.09.009

SONG Jiawen, WANG Qi, WANG Yalun, et al. Security Optimization Method for Unit Commitment in New Power Systems Considering Load Equivalent Inertia[J]. Electric Power Construction. 2025, 46(9): 111-119 https://doi.org/10.12204/j.issn.1000-7229.2025.09.009

中图分类号： TM712

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