| 引用本文: | 范 越,任 冲,王智伟,程 林,张宏桢.考虑电压稳定约束的新能源送出能力及振荡风险影响的量化分析[J].电力系统保护与控制,2025,53(23):152-162.[点击复制] |
| FAN Yue,REN Chong,WANG Zhiwei,CHENG Lin,ZHANG Hongzhen.Quantitative analysis of new energy delivery capability considering voltage stability constraints and oscillation risk[J].Power System Protection and Control,2025,53(23):152-162[点击复制] |
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| 摘要: |
| 新能源机组动态无功支撑能力弱，随着新能源发电出力增大，系统电压支撑能力下降，电压稳定问题突出。现有研究缺乏考虑电压稳定性的新能源送出极限功率的量化评估方法。为此，首先基于静态电压稳定分析判据，推导了考虑电压稳定性的新能源理论最大发电功率解析表达式，明确了理论最大有功功率与系统短路比、阻抗比、无功补偿容量等因素之间的量化关系，提出了满足有功功率发电需求的最小无功补偿容量计算方法。然后，通过基于数值模型的连续潮流法验证了所提方法的正确性和有效性。最后，在考虑详细控制环节的时域模型中，通过阻抗分析法，初步验证了电压稳定水平与宽频振荡风险间的关联关系。研究成果可为快速、准确评估新能源送出系统安全裕度以及无功补偿容量需求，分析新能源送出系统稳定水平提供参考和依据。 |
| 关键词: 电压稳定性 安全裕度评估 最大有功功率理论极限 短路比 |
| DOI：10.19783/j.cnki.pspc.241688 |
| 投稿时间：2024-12-18修订日期：2025-03-24 |
| 基金项目:国家电网公司总部科技项目资助(5100- 202455001A-1-1-ZN) |
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| Quantitative analysis of new energy delivery capability considering voltage stability constraints and oscillation risk |
| FAN Yue1,REN Chong1,WANG Zhiwei1,CHENG Lin1,ZHANG Hongzhen2 |
| (1. Northwest Branch of State Grid Corporation of China, Xi’ an 710048, China; 2. NR Electric Co., Ltd., Nanjing 211102, China) |
| Abstract: |
| Dynamic reactive power support capacity of new energy units is generally weak, and with the increase of new energy generation, the system’s voltage support capacity declines, making voltage stability issue more prominent. Existing studies lack quantitative evaluation methods for determining the maximum deliverable new energy output under voltage stability constraints. To address this gap, this paper first derives an analytical expression for the theoretical maximum active power output of new energy sources considering static voltage stability criteria. The resulting formulation explicitly quantifies the relationship between the theoretical maximum active power and factors such as system short-circuit ratio, impedance ratio, and reactive power compensation capacity. A calculation method for the minimum reactive power compensation capacity to meet active power generation demands is also proposed. The correctness and effectiveness of the proposed method are then validated using continuous power flow analysis based on numerical modeling. Finally, using impedance-based analysis on a detailed time-domain model with full control loops, this paper preliminarily verifies the correlation between voltage stability levels and wideband oscillation risk. The research findings provide reference for rapid and accurate assessment of new energy delivery margins, determination of required reactive compensation capacity, and evaluation of the stability level of new energy delivery systems. |
| Key words: voltage stability security margin assessment theoretical maximum active power short-circuit ratio |
