| 引用本文: | 郑天悦,邓 俊,王潇桐,等.基于电压与功率分布特性的新能源场站等值建模方法[J].电力系统保护与控制,2024,52(22):47-58.[点击复制] |
| ZHENG Tianyue,DENG Jun,WANG Xiaotong,et al.Equivalent modeling method based on voltage and power distribution characteristics of a renewable energy station[J].Power System Protection and Control,2024,52(22):47-58[点击复制] |
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| 摘要: |
| 新能源场站等值建模是高比例新能源电力系统仿真分析的基础，对于电网不同工况与故障，新能源场站内部电压分布情况不同，导致部分新能源机组进入低电压穿越。针对不同机组状态下新能源场站等值建模困难的问题，提出基于电压与功率分布特性的新能源场站等值建模方法。首先，以新能源场站一般结构为基础提出基于道路矩阵的场站拓扑结构表示方法与复杂集电线路拓扑转换方法。其次，提出基于系统道路矩阵的故障期间新能源机组机端电压计算方法，分析了单元变压器挡位对新能源机组进入低电压穿越状态的影响。最后，提出保留电压分布特性的集电线路等值方法，形成基于电压与功率分布特性的新能源场站等值建模方法。并在PSASP中采用10机新能源场站与实际光伏电站算例验证了所提拓扑转化方法与等值建模方法的准确性。 |
| 关键词: 新能源场站 电压分布特性 等值建模 道路矩阵 低电压穿越 |
| DOI：10.19783/j.cnki.pspc.240332 |
| 投稿时间：2024-03-28修订日期：2024-08-02 |
| 基金项目:国家电网公司总部科技项目资助(5100- 202155481A-0-5-ZN) |
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| Equivalent modeling method based on voltage and power distribution characteristics of a renewable energy station |
| ZHENG Tianyue1,DENG Jun1,WANG Xiaotong2,XIA Nan1,WANG Tong2 |
| (1. Power Research Institute of State Grid Shaanxi Electric Power Company Limited, Xi’an 710100, China;
2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
(North China Electric Power University), Beijing 102206, China) |
| Abstract: |
| Equivalent modeling of a renewable energy station is the basis of simulation of a high proportion of renewables energy power system. For different working conditions and faults of the grid, the voltage distribution inside the renewable energy station is different. This leads to parts of units entering low-voltage ride-through (LVRT). There is difficulty in modeling the equivalence of a renewable energy station in different unit states. Thus an equivalence modeling method based on voltage and power distribution characteristics is proposed. First, based on a general structure, a topology representation method of stations based on a road matrix is proposed, and the topology conversion method of complex collector lines is analyzed. Secondly, a system road matrix-based calculation method for converter voltage during faults is proposed, and the effects of renewable energy power and unit transformer blocking on renewable energy units entering LVRT are analyzed. Finally, a collector line equivalence method that preserves the voltage distribution characteristics is proposed, and a renewable energy station equivalence modeling method based on the voltage and power distribution characteristics is formed. The accuracy of the proposed topology transformation method and the equivalence modeling method is verified by using a 10-node renewable energy station and an actual PV station example based on PSASP. |
| Key words: renewable energy station voltage distribution characteristics equivalence modeling road matrix LVRT |
