发电技术 ›› 2022, Vol. 43 ›› Issue (6): 880-891.DOI: 10.12096/j.2096-4528.pgt.21121
康佳乐1, 余浩2, 段瑶2, 陈武晖1, 王丹辉3
收稿日期:
2021-12-25
出版日期:
2022-12-31
发布日期:
2023-01-03
作者简介:
基金资助:
Jiale KANG1, Hao YU2, Yao DUAN2, Wuhui CHEN1, Danhui WANG3
Received:
2021-12-25
Published:
2022-12-31
Online:
2023-01-03
Supported by:
摘要:
风电场中风机数量大并且处于不同的运行风速,建立包含每台风机详细的次同步振荡研究模型非常复杂,而且应用该模型进行次同步振荡研究计算耗时长。因此,需要建立保留风电场与接入系统相互作用的次同步振荡特性的风电场等值模型,简化次同步振荡研究的复杂程度。计及风机不同运行风速区间的不同控制策略对次同步振荡模式的影响,采用基于风速指标K-means算法聚类风机,考虑各台风电机组出线端的电流幅值和相位不同的影响,提出基于功率等值的集电系统简化建模方法,在PSCAD/EMTDC中搭建相关风电场仿真模型,并对等值前后次同步振荡模态进行了对比,用以验证该等值方法的合理性。
中图分类号:
康佳乐, 余浩, 段瑶, 陈武晖, 王丹辉. 风电场次同步振荡等值建模方法研究[J]. 发电技术, 2022, 43(6): 880-891.
Jiale KANG, Hao YU, Yao DUAN, Wuhui CHEN, Danhui WANG. Equivalent Modeling Method of Sub-synchronous Oscillation in Wind Farm[J]. Power Generation Technology, 2022, 43(6): 880-891.
额定容量/MW | 额定电压/V | Xls /pu | XM /pu | Xlr /pu | Rs /pu | Rr /pu |
---|---|---|---|---|---|---|
5 | 690 | 0.10 | 4.50 | 0.11 | 0.005 4 | 0.006 07 |
表 1 5 MW风电机组参数
Tab. 1 Parameters of the 5 MW wind turbine
额定容量/MW | 额定电压/V | Xls /pu | XM /pu | Xlr /pu | Rs /pu | Rr /pu |
---|---|---|---|---|---|---|
5 | 690 | 0.10 | 4.50 | 0.11 | 0.005 4 | 0.006 07 |
型号 | 额定电压/kV | 截面积/mm2 | 每千米电阻/Ω | 每千米电感/mH | 允许载流量/A |
---|---|---|---|---|---|
LGJ | 35 | 35 | 0.938 | 1.382 | 148 |
LGJ | 35 | 50 | 0.678 | 1.350 | 193 |
LGJ | 35 | 95 | 0.349 | 1.270 | 295 |
LGJ | 35 | 120 | 0.285 | 1.248 | 335 |
LGJ | 35 | 185 | 0.181 | 1.203 | 454 |
表 2 35 kV线路参数
Tab. 2 Parameters of the 35 kV aerial conductor
型号 | 额定电压/kV | 截面积/mm2 | 每千米电阻/Ω | 每千米电感/mH | 允许载流量/A |
---|---|---|---|---|---|
LGJ | 35 | 35 | 0.938 | 1.382 | 148 |
LGJ | 35 | 50 | 0.678 | 1.350 | 193 |
LGJ | 35 | 95 | 0.349 | 1.270 | 295 |
LGJ | 35 | 120 | 0.285 | 1.248 | 335 |
LGJ | 35 | 185 | 0.181 | 1.203 | 454 |
编号 | 风速/(m/s) | 编号 | 风速/(m/s) |
---|---|---|---|
1 | 10.65 | 11 | 8.21 |
2 | 9.71 | 12 | 6.94 |
3 | 8.71 | 13 | 10.34 |
4 | 7.66 | 14 | 9.32 |
5 | 10.85 | 15 | 8.21 |
6 | 9.51 | 16 | 6.96 |
7 | 8.72 | 17 | 10.55 |
8 | 7.64 | 18 | 9.42 |
9 | 10.35 | 19 | 8.32 |
10 | 9.32 | 20 | 7.44 |
表 3 各风电机组的风速
Tab. 3 Wind speed of each turbines in the plant
编号 | 风速/(m/s) | 编号 | 风速/(m/s) |
---|---|---|---|
1 | 10.65 | 11 | 8.21 |
2 | 9.71 | 12 | 6.94 |
3 | 8.71 | 13 | 10.34 |
4 | 7.66 | 14 | 9.32 |
5 | 10.85 | 15 | 8.21 |
6 | 9.51 | 16 | 6.96 |
7 | 8.72 | 17 | 10.55 |
8 | 7.64 | 18 | 9.42 |
9 | 10.35 | 19 | 8.32 |
10 | 9.32 | 20 | 7.44 |
分组编号 | 机组编号 | 等值风速/(m/s) | 等值电阻/pu | 等值电抗/pu |
---|---|---|---|---|
1 | 1,5,9,13,17 | 10.47 | 0.088 | 0.142 |
2 | 2,6,10,14,18 | 9.46 | 0.093 | 0.149 |
3 | 3,7,11,15,19 | 8.42 | 0.094 | 0.152 |
4 | 4,8,12,16,20 | 7.34 | 0.081 | 0.137 |
表 4 最终等值后的风速与阻抗值
Tab. 4 Wind speed and impedance after final equivalence
分组编号 | 机组编号 | 等值风速/(m/s) | 等值电阻/pu | 等值电抗/pu |
---|---|---|---|---|
1 | 1,5,9,13,17 | 10.47 | 0.088 | 0.142 |
2 | 2,6,10,14,18 | 9.46 | 0.093 | 0.149 |
3 | 3,7,11,15,19 | 8.42 | 0.094 | 0.152 |
4 | 4,8,12,16,20 | 7.34 | 0.081 | 0.137 |
模型 | 实际运行时间/s |
---|---|
详细模型 | 219 |
简化等值模型 | 27 |
表5 仿真时间对比
Tab.5 Simulation time comparison
模型 | 实际运行时间/s |
---|---|
详细模型 | 219 |
简化等值模型 | 27 |
子风电场编号 | 机组台数 | 风速/(m/s) |
---|---|---|
1 | 10 | 11 |
2 | 10 | 8 |
表 6 各子风电场中风机台数和风速
Tab. 6 Number of wind turbines and wind speed in each sub-wind farm
子风电场编号 | 机组台数 | 风速/(m/s) |
---|---|---|
1 | 10 | 11 |
2 | 10 | 8 |
等值方法 | 风速/(m/s) | 电阻/pu | 电抗/pu |
---|---|---|---|
未等值子风场1 | 11 | 0.025 | 0.128 |
未等值子风场2 | 8 | 0.008 5 | 0.427 |
串并联等值 | 9.7 | 0.006 4 | 0.032 |
功率等值 | 9.7 | 0.014 | 0.070 |
表 7 不同等值方法的风速与阻抗值
Tab. 7 Values of different wind speeds and impedances using different equivalent methods
等值方法 | 风速/(m/s) | 电阻/pu | 电抗/pu |
---|---|---|---|
未等值子风场1 | 11 | 0.025 | 0.128 |
未等值子风场2 | 8 | 0.008 5 | 0.427 |
串并联等值 | 9.7 | 0.006 4 | 0.032 |
功率等值 | 9.7 | 0.014 | 0.070 |
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