无刷双馈感应风电机组无功范围研究

doi:10.11985/2016.12.004

摘要/Abstract

摘要：

确定无刷双馈感应发电机（BDFIG）无功范围,是其参与电网电压控制和安全调度的基础。本文提出不同风速和运行模式时BDFIG无功范围的解析算法。在最大功率点跟踪（MPPT）和有功调度模式下,分别求取无功上下限对风速和有功功率的偏导数,分析不同风速和调度方式对无功范围的影响。发现BDFIG铜耗影响有功出力和无功范围,用其量化后者误差。仿真结果表明,在MPPT模式下,风速越大,BDFIG无功范围越宽。在有功调度模式下,与转速调节相比,相同有功功率参考值时采用桨距角调节有功损耗小,无功范围宽。

关键词: 无刷双馈发电机, 无功范围, 风速, 转差率, 最大功率点跟踪, 有功调度

Abstract:

Quantification of reactive power capability (RPC) is necessary for the brushless doubly-fed induction generator (BDFIG) participating in voltage control and security dispatch of power system. The analytical model of the RPC of the BDFIG with different wind speeds and operation modes is newly quantified. Following the maximum power point tracking (MPPT), derivatives of the upper/lower var limits to the slip are derived to validate effect of wind speeds on RPC. Following active power dispatch, the derivatives of var limits to the active output of the BDFIG are quantified to validate effect of power regulations on the RPC. The copper loss affects active output and var region, thus it is applied to quantify the error of the latter. Numerical results show that under MPPT mode, higher wind speed yields lower rotor slip and a wider RPC. Under active power dispatch with the same power references, the pitch angle regulation has lower copper loss and wider RPC compared with the rotor speed regulation.

Key words: Brushless doubly fed induction generator, reactive power capability, wind speed, slip, maximum power point tracking, active power dispatch

中图分类号:

TM614

李生虎,安锐,吴正阳. 无刷双馈感应风电机组无功范围研究[J]. 电气工程学报, 2016, 11(12): 22-29.

Li Shenghu,An Rui,Wu Zhengyang. Reactive Power Capability of Brushless Doubly Fed Induction Generators[J]. Journal of Electrical Engineering, 2016, 11(12): 22-29.

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v/(m/s)	s	P_wt(pu)	P_BDFIG(pu)	Q_BDFIGmin(pu)	Q_BDFIGmax(pu)
5.00	0.300 0	0.064 2	0.059 2	-1.395 7	0.873 6
6.00	0.266 6	0.123 8	0.117 5	-1.385 2	0.862 1
7.00	0.144 4	0.196 5	0.188 8	-1.376 0	0.851 5
8.00	0.022 2	0.293 3	0.283 4	-1.361 1	0.834 4
9.00	-0.100 1	0.417 7	0.404 5	-1.334 5	0.804 4
10.00	-0.222 3	0.572 9	0.555 2	-1.284 3	0.749 0
11.00	-0.300 0	0.758 5	0.733 6	-1.191 9	0.646 8
12.00	-0.300 0	0.928 8	0.894 3	-1.076 1	0.513 2
12.49	-0.300 0	1.000 0	0.960 9	-1.016 7	0.442 8

P_BDFIG,set(pu)	转速调节
P_BDFIG,set(pu)	s	P_BDFIG(pu)	Q_BDFIGmin(pu)	Q_BDFIGmax(pu)
0.25	0.238 5	0.238 8	-1.344 9	0.817 3
0.30	0.192 3	0.287 0	-1.333 1	0.803 7
0.35	0.145 5	0.335 3	-1.322 2	0.790 7
0.40	0.096 4	0.383 7	-1.312 8	0.779 6
0.45	0.042 6	0.432 2	-1.302 5	0.767 3
0.50	-0.021 0	0.481 2	-1.293 8	0.757 2
0.55	-0.110 8	0.530 8	-1.286 1	0.749 0
0.5729	-0.222 3	0.555 2	-1.284 3	0.749 0
P_BDFIG,set(pu)	桨距角调节
P_BDFIG,set(pu)	β/(°)	P_BDFIG(pu)	Q_BDFIGmin(pu)	Q_BDFIGmax(pu)
0.25	4.146 4	0.242 9	-1.378 6	0.854 7
0.30	3.234 8	0.291 8	-1.369 1	0.844 1
0.35	2.464 1	0.340 5	-1.357 7	0.831 4
0.40	1.796 4	0.388 9	-1.344 5	0.816 7
0.45	1.207 5	0.437 2	-1.329 5	0.799 9
0.50	0.680 7	0.485 3	-1.312 6	0.780 9
0.55	0.240 1	0.533 3	-1.293 7	0.759 6
0.5729	0	0.555 2	-1.284 3	0.749 0