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What does this error mean? power flow code

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Yasir Ghazi
Yasir Ghazi on 17 Apr 2018
Edited: Walter Roberson on 17 Apr 2018
% Bus Bus Voltage Angle ---Load---- -------Generator----- Injected
% No code Mag. Degree MW Mvar MW Mvar Qmin Qmax Mvar
busdata=[1 0 1.00 0 5.6 2.6 0 0 0 0 0
2 2 0.9793 0 0 0 404.1 239.3 180 -180 0
3 0 1.00 0 5.6 2.6 0 0 0 0 0
4 0 1.00 0 36.9 16.8 0 0 0 0 0
5 0 1.00 0 66.6 27.6 0 0 0 0 0
6 0 1.00 0 101.2 46.1 0 0 0 0 0
7 0 1.00 0 40.4 18.4 0 0 0 0 0
8 0 1.00 0 78.7 35.9 0 0 0 0 0
9 0 1.00 0 56.2 25.6 0 0 0 0 0
10 0 1.00 0 78.7 35.9 0 0 0 0 0
11 0 1.00 0 33.7 15.4 0 0 0 0 0
12 0 1.00 0 30.3 13.8 0 0 0 0 0
13 0 1.00 0 33.7 15.4 0 0 0 0 0
14 0 1.00 0 56.2 26.6 0 0 0 0 0
15 0 0.9297 0 0 0 0 0 0 0 0
16 0 1.00 0 20.2 9.2 0 0 0 0 0
17 2 0.9347 0 0 0 596.2 292.4 240 -240 0
18 0 1.00 0 0 0 0 0 0 0 0
19 0 1.00 0 0 0 0 0 0 0 0
20 0 1.00 0 22.2 10.1 0 0 0 0 0
21 2 0.9304 0 5.6 2.5 210 -90 120 -120 0
22 0 1.00 0 0 0 0 0 0 0 0
23 0 1.00 0 50 22.8 0 0 0 0 0
24 0 1.00 0 25 11.2 0 0 0 0 0
25 0 1.00 0 35 16 0 0 0 0 0
26 2 0.9725 0 0 0 230 -12.1 120 -120 0
27 0 1.00 0 26.3 12 0 0 0 0 0
28 0 1.00 0 75.1 34.2 0 0 0 0 0
29 0 1.00 0 0 0 0 0 0 0 0
30 0 1.00 0 7.5 3.4 0 0 0 0 0
31 0 1.00 0 74.6 34 0 0 0 0 0
32 0 1.00 0 10 4.6 0 0 0 0 0
33 0 1.00 0 65.1 29.6 0 0 0 0 0
34 0 1.00 0 22.4 10.2 0 0 0 0 0
35 2 0.9706 0 30 13.7 45 17.1 30 -30 0
36 0 1.00 0 14.9 6.8 0 0 0 0 0
37 0 1.00 0 7.5 3.4 0 0 0 0 0
38 0 1.00 0 7.5 3.4 0 0 0 0 0
39 0 1.00 0 20 9.1 0 0 0 0 0
40 0 1.00 0 0 0 0 0 0 0 0
41 0 1.00 0 0 0 0 0 0 0 0
42 0 1.00 0 89 40.5 0 0 0 0 0
43 0 1.00 0 71.2 32.4 0 0 0 0 0
44 2 0.9745 0 0 0 469.2 182 240 -240 0
45 0 1.00 0 97.9 44.6 0 0 0 0 0
46 0 1.00 0 71.2 32.4 0 0 0 0 0
47 0 1.00 0 26.7 12.2 0 0 0 0 0
48 2 0.9811 0 35.6 16.2 116 123.9 180 -180 0
49 2 0.9811 0 8.9 4.1 49.5 18.6 30 -30 0
50 0 1.00 0 44.5 20.3 0 0 0 0 0
51 0 1.00 0 80.1 36.5 0 0 0 0 0
52 0 1.00 0 0 0 258 94 120 -120 0
53 0 1.00 0 40.8 18.6 0 0 0 0 0
54 0 1.00 0 65.2 29.7 0 0 0 0 0
55 0 1.00 0 97.8 44.6 0 0 0 0 0
56 0 1.00 0 48.9 22.3 0 0 0 0 0
57 0 1.00 0 101.9 46.4 0 0 0 0 0
58 0 1.00 0 0 0 0 0 0 0 0
59 2 1.00 0 0 0 240 107 120 -120 0
60 0 1.00 0 97.8 44.6 0 0 0 0 0
61 0 1.00 0 69.3 31.6 0 0 0 0 0
62 0 1.00 0 101.1 46 0 0 0 0 0
63 0 1.00 0 89.7 40.8 0 0 0 0 0
64 0 1.00 0 110 50.1 0 0 0 0 0
65 0 1.00 0 81.5 37.1 0 0 0 0 0
66 0 1.00 0 126.3 57.6 0 0 0 0 0
67 2 0.9729 0 0 0 254 138.4 180 -180 0
68 0 1.00 0 97.8 44.6 0 0 0 0 0
69 0 1.00 0 73.4 33.4 0 0 0 0 0
70 0 1.00 0 77.4 35.3 0 0 0 0 0
71 0 1.00 0 0 0 457.8 273.3 340 -340 0
72 0 1.00 0 106 48.3 0 0 0 0 0
73 0 1.00 0 77.4 35.3 0 0 0 0 0
74 0 1.00 0 59.5 27.1 0 0 0 0 0
75 2 1.0256 0 0 0 236.6 6.9 120 -120 0
76 0 1.00 0 97.8 44.6 0 0 0 0 0
77 0 1.00 0 110 50.1 0 0 0 0 0
78 0 1.00 0 97.8 44.6 0 0 0 0 0
79 2 1.0259 0 0 0 134 15 60 -60 0
80 2 0.937 0 0 0 195.5 47 60 -60 0
81 0 1.00 0 85.6 39 0 0 0 0 0
82 2 0.9238 0 0 0 267 90 120 -120 0
83 0 1.00 0 8.2 3.7 0 0 0 0 0
84 0 1.00 0 85.6 39 0 0 0 0 0
85 0 1.00 0 68.5 31.2 0 0 0 0 0
86 2 1.00 0 0 0 569.7 164.8 180 -180 0
87 0 1.00 0 20.4 9.3 0 0 0 0 0
88 0 1.00 0 16.3 7.4 0 0 0 0 0
89 0 1.00 0 45.5 20.7 0 0 0 0 0
90 2 0.9457 0 0 0 148.7 106.7 120 -120 0
91 0 1.00 0 54.6 24.9 0 0 0 0 0
92 0 1.00 0 0 0 0 0 0 0 0
93 0 1.00 0 53 24.1 0 0 0 0 0
94 2 0.9043 0 0 0 221.6 141.6 240 -240 0
95 0 1.00 0 19.6 8.9 0 0 0 0 0
96 0 1.00 0 13 5.9 0 0 0 0 0
97 0 1.00 0 16.3 7.4 0 0 0 0 0
98 2 0.9503 0 16.3 7.4 195.5 47 60 -60 0
99 2 1.0253 0 0 0 148.7 106.7 120 -120 0
100 2 0.9645 0 0 0 300 150.8 180 -180 0
101 0 1.00 0 53 24.1 0 0 0 0 0
102 0 1.00 0 101.91 46.4 0 0 0 0 0
103 0 1.00 0 93.7 42.7 0 0 0 0 0
104 0 1.00 0 89.7 40.8 0 0 0 0 0
105 0 1.00 0 77.4 35.3 0 0 0 0 0
106 0 1.00 0 61.1 27.9 0 0 0 0 0
107 2 0.9802 0 0 0 312 162.7 240 -240 0
108 0 1.00 0 69.3 31.6 0 0 0 0 0
109 0 1.00 0 11.4 5.2 0 0 0 0 0
110 0 1.00 0 65.2 29.7 0 0 0 0 0
111 0 1.00 0 23.6 10.8 0 0 0 0 0
112 0 1.00 0 6.5 3 0 0 0 0 0
113 0 1.00 0 20.4 9.3 0 0 0 0 0
114 2 0.9149 0 42.9 19.5 37.6 10.4 60 -60 0
115 2 0.9267 0 0 0 133.5 73.4 90 -90 0
116 0 1.00 0 107.1 48.8 0 0 0 0 0
117 1 0.9401 0 0 0 0 0 0 0 0
118 0 1.00 0 100.3 45.7 0 0 0 0 0
119 0 1.00 0 20.1 9.1 0 0 0 0 0
120 0 1.00 0 21.1 9.6 0 0 0 0 0
121 2 0.9815 0 17 7.7 387.8 279.4 360 -360 0
122 0 1.00 0 97.3 44.3 0 0 0 0 0
123 0 1.00 0 63.7 29 0 0 0 0 0
124 0 1.00 0 192.1 58.8 0 0 0 0 0
125 0 1.00 0 53.7 24.4 0 0 0 0 0
126 1 0.9092 0 45.1 20.6 0 0 0 0 0
127 0 1.00 0 0 0 0 0 0 0 0
128 0 1.00 0 73.7 33.6 0 0 0 0 0
129 0 1.00 0 26.1 11.9 0 0 0 0 0
130 0 1.00 0 23 10.5 0 0 0 0 0
131 0 1.00 0 73 33.3 0 0 0 0 0
132 0 1.00 0 40 18.2 0 0 0 0 0
133 0 1.00 0 75 34.2 0 0 0 0 0
134 0 1.00 0 13.3 6 0 0 0 0 0
135 0 1.00 0 54.5 24.8 0 0 0 0 0
136 2 1.00 0 81.1 36.9 54 19.5 30 -30 0
137 0 1.00 0 45.7 20.8 0 0 0 0 0
138 0 1.00 0 57.5 26.2 0 0 0 0 0
139 0 1.00 0 0 0 0 0 0 0 0
140 0 1.00 0 122.3 55.7 0 0 0 0 0
141 2 0.9937 0 0 0 255.4 168.9 180 -180 0
142 2 0.9775 0 0 0 245.2 170 180 -180 0
143 0 1.00 0 36.8 16.8 0 0 0 0 0
144 0 1.00 0 95.8 43.6 0 0 0 0 0
145 2 0.995 0 0 0 188.2 71.6 120 -120 0
146 0 1.00 0 16.9 7.7 0 0 0 0 0
147 0 1.00 0 47.8 21.8 0 0 0 0 0
148 0 1.00 0 147.6 67.2 0 0 0 0 0
149 0 1.00 0 103.8 47.3 0 0 0 0 0
150 0 1.00 0 102.2 46.6 0 0 0 0 0
151 0 1.00 0 8.1 3.7 0 0 0 0 0
152 2 0.9823 0 94.9 43.2 26 21.5 30 -30 0
153 0 1.00 0 130.6 59.5 0 0 0 0 0
154 0 1.00 0 0 0 0 0 0 0 0
155 0 1.00 0 102.3 46.6 0 0 0 0 0
156 0 1.00 0 128.7 58.6 0 0 0 0 0
157 0 1.00 0 23.9 10.9 0 0 0 0 0
158 0 1.00 0 151.7 69.1 0 0 0 0 0
159 0 1.00 0 0 0 0 0 0 0 0
160 0 1.00 0 109.1 49.7 0 0 0 0 0
161 0 1.00 0 59.7 27.2 0 0 0 0 0
162 2 0.9978 0 0 0 315.6 178.8 120 -120 0
163 0 1.00 0 83.5 38.1 0 0 0 0 0
164 0 1.00 0 78.7 35.8 0 0 0 0 0
165 2 0.9641 0 0 0 766 552.5 600 -600 0
166 0 1.00 0 132.8 60.5 0 0 0 0 0
167 0 1.00 0 78.7 35.8 0 0 0 0 0
168 0 1.00 0 56.1 25.5 0 0 0 0 0
169 2 0.8539 0 150.5 68.6 52.6 58 60 -60 0
170 0 1.00 0 38.4 17.5 0 0 0 0 0
171 0 1.00 0 97.4 44.4 0 0 0 0 0
172 2 0.9952 0 66.6 30.4 29 10.8 30 -30 0
173 0 1.00 0 16.6 7.6 0 0 0 0 0
174 0 1.00 0 52 23.7 0 0 0 0 0
175 0 1.00 0 50.2 22.9 0 0 0 0 0
176 0 1.00 0 77.6 35.4 0 0 0 0 0
177 2 0.9757 0 0 0 279 250.1 240 -240 0
178 0 1.00 0 146.6 66.8 0 0 0 0 0
179 0 1.00 0 172.4 78.6 0 0 0 0 0
180 0 1.00 0 51.3 23.4 0 0 0 0 0
181 0 1.00 0 65.9 30 0 0 0 0 0
182 0 1.00 0 86.2 39.3 0 0 0 0 0
183 0 1.00 0 86.2 39.3 0 0 0 0 0
184 2 0.9763 0 0 0 373 256.7 240 -240 0
185 0 1.00 0 43.2 19.7 0 0 0 0 0
186 0 1.00 0 19.7 9 0 0 0 0 0
187 0 1.00 0 140.2 63.9 0 0 0 0 0
188 0 1.00 0 66.1 30.1 0 0 0 0 0
189 0 1.00 0 40 18.2 0 0 0 0 0
190 2 1.0075 0 0 0 26.5 9.3 30 -30 0
191 2 0.9368 0 44.4 20.2 27.5 21.4 30 -30 0
192 2 0.9466 0 0 0 154.4 -13 30 -30 0
193 2 0.9466 0 0 0 13.7 4.7 30 -30 0
194 2 1.00 0 0 0 26.5 33.8 60 -60 0
195 0 1.00 0 26.6 13.5 0 0 0 0 0
196 0 1.00 0 31.5 14.3 0 0 0 0 0
197 0 1.00 0 0 0 0 0 0 0 0
198 0 1.00 0 28.3 12.9 0 0 0 0 0
199 0 1.00 0 25.2 11.5 0 0 0 0 0
200 0 1.00 0 59.8 27.3 0 0 0 0 0
201 0 1.00 0 0.6 0.3 0 0 0 0 0
202 0 1.00 0 0.6 0.3 0 0 0 0 0
203 0 1.00 0 0.6 0.3 0 0 0 0 0
204 0 1.00 0 0.6 0.3 0 0 0 0 0
205 0 1.00 0 15.1 6.9 0 0 0 0 0
206 0 1.00 0 0.6 0.3 0 0 0 0 0
207 0 1.00 0 0.6 0.3 0 0 0 0 0
208 0 1.00 0 12.6 5.7 0 0 0 0 0
209 0 1.00 0 69.3 31.6 0 0 0 0 0
210 0 1.00 0 31.5 14.3 0 0 0 0 0
211 0 1.00 0 75.6 34.4 0 0 0 0 0
212 0 1.00 0 0 0 0 0 0 0 0
213 0 1.00 0 73.5 33.5 0 0 0 0 0
214 0 1.00 0 113.4 51.7 0 0 0 0 0
215 2 0.9993 0 0 0 233.3 193.2 240 -240 0
216 0 1.00 0 75.6 34.4 0 0 0 0 0
217 0 1.00 0 44.1 20.1 0 0 0 0 0
218 0 1.00 0 47.9 21.8 0 0 0 0 0
219 0 1.00 0 0.6 0.3 0 0 0 0 0
220 0 1.00 0 12.6 5.7 0 0 0 0 0
221 0 1.00 0 50.4 23 0 0 0 0 0
222 0 1.00 0 3.1 1.4 0 0 0 0 0
223 0 1.00 0 9.4 4.3 0 0 0 0 0
224 0 1.00 0 34.6 15.8 0 0 0 0 0
225 0 1.00 0 3.8 1.7 0 0 0 0 0
226 0 1.00 0 0.6 0.3 0 0 0 0 0
227 0 1.00 0 0.6 0.3 0 0 0 0 5
228 0 1.00 0 126 57.4 0 0 0 0 0
229 0 1.00 0 7.6 3.4 0 0 0 0 0
230 2 1.0364 0 0 0 223 11 180 -180 0
231 0 1.00 0 69.3 31.6 0 0 0 0 0
232 2 0.9645 0 0 0 212.8 112.8 120 -120 0
233 0 1.00 0 0 0 0 0 0 0 0
234 0 1.00 0 71.8 32.7 0 0 0 0 0
235 0 1.00 0 0 0 0 0 0 0 0
236 0 1.00 0 0 0 0 0 0 0 0
237 0 1.00 0 47.2 21.5 0 0 0 0 0
238 0 1.00 0 15.1 6.9 0 0 0 0 0
239 2 0.9956 0 0 0 136 66 120 -120 0
240 0 1.00 0 18.9 8.6 0 0 0 0 0];
% Line code
% Bus bus R X 1/2 B = 1 for lines
% nl nr p.u. p.u. p.u. > 1 or < 1 tr. tap at bus nl
linedata=[1 2 0.03199 0.12771 0.01489 1
2 3 0.00695 0.02776 0.003235 1
2 4 0.00167 0.00937 0.00221 1
2 8 0.002176 0.013432 0.002569 1
2 11 0.002316 0.014293 0.0027335 1
2 13 0.023034 0.050448 0.004527 1
5 12 0.007594 0.058192 0.005712 1
5 15 0.004661 0.019349 0.0035425 1
6 14 0.001395 0.007805 0.0018435 1
7 11 0.00837 0.05166 0.0098805 1
7 14 0.001395 0.007805 0.0018435 1
7 15 0.006138 0.037884 0.0072455 1
8 11 0.000237 0.001464 0.00028 1
9 11 0.054042 0.109521 0.009634 1
9 13 0.023654 0.071031 0.006745 1
9 17 0.020402 0.061011 0.006073 1
10 17 0.0012 0.007405 0.001416 1
10 27 0.03213 0.08721 0.0095 1
12 16 0.002232 0.013776 0.002635 1
14 15 0.008474 0.03518 0.006441 1
20 21 0.04228 0.12285 0.01159 1
20 22 0.04228 0.11475 0.0125 1
22 31 0.005563 0.02383 0.0023945 1
23 25 0.04228 0.11475 0.0125 1
24 32 0.030525 0.08892 0.0084555 1
24 22 0.018265 0.053071 0.005007 1
25 31 0.024665 0.113231 0.013038 1
26 30 0.010993 0.031941 0.0030135 1
28 44 0.04482 0.12164 0.01325 1
29 31 0.005106 0.031513 0.006027 1
32 88 0.026231 0.087598 0.0085125 1
33 48 0.063413 0.30193 0.030952 1
34 33 0.04482 0.12164 0.01325 1
34 35 0.04228 0.11475 0.0125 1
34 36 0.018265 0.053071 0.005007 1
36 37 0.024665 0.113231 0.013038 1
36 38 0.005563 0.02383 0.0023945 1
29 52 0.01237 0.067996 0.371892 1
39 53 0.023677 0.068796 0.0064905 1
40 50 0.032959 0.16403 0.0182015 1
41 48 0.02118 0.09445 0.011255 1
42 43 0.002803 0.013157 0.002159 1
43 44 0.006138 0.037884 0.0072455 1
44 45 0.001395 0.007805 0.0018435 1
44 46 0.0089 0.03554 0.004145 1
44 47 0.01268 0.03443 0.0035 1
44 48 0.01691 0.0459 0.005 1
44 49 0.01113 0.04442 0.00518 1
45 51 0.002009 0.011239 0.0026545 1
48 49 0.00003 0.00017 0.000035 1
48 50 0.028242 0.14106 0.014556 1
52 105 0.005356 0.039944 0.0083355 1
53 94 0.006417 0.039606 0.007575 1
54 55 0.00234 0.01001 0.001005 1
54 59 0.012568 0.02547 0.08962 1
54 109 0.003351 0.018761 0.0024885 1
55 56 0.00612 0.02621 0.002635 1
55 57 0.00401 0.01716 0.001725 1
56 104 0.000336 0.000908 0.10835 1
57 59 0.004586 0.038282 0.007652 1
57 60 0.00032 0.00086 0.10244 1
58 107 0.000061 0.000167 0.004925 1
60 61 0.00024 0.00066 0.07835 1
62 104 0.000305 0.000825 0.0985 1
63 64 0.00097 0.00266 0.00788 1
63 67 0.00612 0.02443 0.00285 1
64 67 0.00054 0.0015 0.044325 1
65 67 0.000237 0.001464 0.00028 1
66 67 0.00039 0.00107 0.03152 1
67 103 0.00279 0.01722 0.0032935 1
67 107 0.007232 0.028873 0.0033665 1
68 89 0.00946 0.03776 0.0044 1
68 100 0.005007 0.019989 0.0023305 1
68 132 0.020378 0.114055 0.02014 1
69 72 0.00286 0.016 0.003779 1
70 79 0.000518 0.001403 0.16745 1
71 72 0.00753 0.04215 0.009955 1
71 103 0.011662 0.06525 0.0154115 1
71 118 0.00321 0.01795 0.00424 1
73 75 0.00092 0.00253 0.07497 1
74 76 0.00286 0.016 0.003779 1
75 76 0.00047 0.00128 0.037925 1
75 79 0.000061 0.000167 0.004925 1
76 99 0.00047 0.00128 0.037925 1
77 90 0.000244 0.00066 0.0788 1
78 101 0.001172 0.007232 0.0013835 1
79 99 0.000427 0.001155 0.1379 1
81 79 0.00286 0.016 0.003779 1
82 130 0.034902 0.075754 0.006783 1
82 131 0.0106 0.06544 0.012515 1
83 85 0.00033 0.00089 0.01062 1
83 86 0.004297 0.026519 0.005072 1
83 106 0.000605 0.001665 0.04925 1
84 106 0.00286 0.016 0.003779 1
85 86 0.00154 0.00859 0.00203 1
86 91 0.000732 0.00198 0.2364 1
86 108 0.005217 0.032201 0.006159 1
86 109 0.001256 0.007749 0.001482 1
87 94 0.000558 0.003444 0.0006585 1
88 108 0.007952 0.044489 0.010508 1
89 134 0.01846 0.09858 0.006755 1
89 139 0.01574 0.04996 0.004795 1
92 101 0.000305 0.000825 0.0985 1
92 102 0.000159 0.000429 0.05122 1
92 112 0.000021 0.000058 0.006895 1
93 99 0.00061 0.00165 0.197 1
95 94 0.00286 0.016 0.003779 1
98 101 0.00385 0.023764 0.004545 1
98 102 0.004297 0.026519 0.005072 1
100 111 0.000605 0.001665 0.04925 1
101 112 0.000305 0.000825 0.0985 1
107 110 0.000366 0.00099 0.1182 1
113 112 0.00286 0.016 0.003779 1
114 115 0.03338 0.13326 0.015535 1
115 116 0.00279 0.01561 0.003685 1
117 119 0.007254 0.044772 0.008563 1
117 121 0.020088 0.123984 0.023713 1
118 126 0.008805 0.054346 0.0103945 1
119 120 0.058177 0.169042 0.015948 1
121 122 0.0228 0.09106 0.010615 1
123 128 0.039956 0.09948 0.009154 1
124 125 0.03159 0.09097 0.00857 1
124 128 0.004882 0.030135 0.0057635 1
125 175 0.1215 0.3148 0.029165 1
126 127 0.007254 0.040586 0.009586 1
128 186 0.04495 0.111915 0.0102985 1
129 127 0.00286 0.016 0.003779 1
131 133 0.018914 0.081022 0.0081415 1
134 135 0.0038 0.0291 0.002856 1
134 139 0.027059 0.07344 0.008 1
134 143 0.009271 0.051889 0.009774 1
134 149 0.013392 0.074928 0.0176975 1
134 152 0.010114 0.062422 0.011939 1
135 146 0.026359 0.112161 0.0157755 1
136 140 0.000214 0.000578 0.06895 1
136 141 0.013022 0.037838 0.0035695 1
136 144 0.004228 0.012285 0.001159 1
137 143 0.00759 0.031719 0.0058125 1
138 140 0.01808 0.077448 0.007782 1
138 164 0.014368 0.088683 0.0169615 1
140 141 0.00622 0.03497 0.00826 1
141 144 0.003284 0.020268 0.0038765 1
141 145 0.000382 0.002139 0.000505 1
141 153 0.002887 0.01615 0.0038145 1
142 143 0.00286 0.016 0.003779 1
147 149 0.04951 0.19767 0.023045 1
148 150 0.002371 0.013269 0.003134 1
149 150 0.002464 0.015205 0.002908 1
149 151 0.009904 0.055415 0.013089 1
149 152 0.003488 0.021525 0.004117 1
150 151 0.007533 0.042147 0.009955 1
154 155 0.005074 0.01377 0.0015 1
154 159 0.000061 0.000167 0.004925 1
154 164 0.02579 0.07 0.007625 1
156 159 0.002232 0.013776 0.002635 1
156 160 0.001228 0.008835 0.0010825 1
156 165 0.022006 0.095588 0.0176065 1
157 158 0.010368 0.05805 0.007155 1
158 159 0.005859 0.036162 0.0069165 1
158 161 0.005301 0.029659 0.0070055 1
158 162 0.007276 0.04491 0.0085895 1
159 161 0.000586 0.003278 0.0007745 1
159 163 0.008304 0.051255 0.009803 1
159 168 0.010602 0.065436 0.0125155 1
160 162 0.007618 0.051268 0.007774 1
161 162 0.010375 0.064033 0.012247 1
163 168 0.006468 0.039919 0.007635 1
164 165 0.00924 0.03687 0.0043 1
165 166 0.00272 0.0152 0.00359 1
165 167 0.00356 0.014214 0.0016575 1
165 168 0.010038 0.076923 0.0075505 1
165 169 0.005664 0.031688 0.0074845 1
165 170 0.00837 0.05166 0.0098805 1
170 171 0.015345 0.09471 0.018114 1
171 172 0.001947 0.007774 0.0009065 1
172 173 0.033963 0.07939 0.008381 1
172 174 0.025042 0.062605 0.0058035 1
174 177 0.071241 0.177629 0.016388 1
175 187 0.072319 0.30979 0.0311285 1
176 184 0.012834 0.079212 0.01515 1
176 185 0.03296 0.08207 0.00755 1
177 182 0.002511 0.015498 0.002964 1
178 184 0.000558 0.003122 0.0007375 1
179 184 0.003906 0.024108 0.004611 1
180 181 0.01116 0.06888 0.013174 1
183 197 0.093016 0.27027 0.025498 1
186 195 0.039956 0.09948 0.009154 1
187 189 0.002651 0.01483 0.0035025 1
187 191 0.010995 0.04903 0.009061 1
187 195 0.05494 0.136785 0.012587 1
188 192 0.007097 0.030345 0.004378 1
188 239 0.023436 0.144648 0.0276655 1
189 192 0.004045 0.022634 0.005346 1
190 194 0.000036 0.0001 0.002955 1
191 192 0.008928 0.049952 0.0117985 1
191 194 0.038035 0.115983 0.0119435 1
192 193 0.000061 0.000167 0.004925 1
192 193 0.000061 0.000167 0.004925 1
196 235 0.000488 0.00132 0.1576 1
197 198 0.00964 0.02616 0.00285 1
197 201 0.009724 0.028256 0.0026655 1
197 202 0.01835 0.053317 0.00503 1
197 205 0.01158 0.03366 0.003175 1
197 206 0.02591 0.09576 0.00888 1
197 225 0.011416 0.033169 0.0031295 1
197 229 0.022831 0.061965 0.00675 1
197 233 0.003488 0.021525 0.004117 1
199 233 0.00964 0.026163 0.00285 1
200 209 0.012862 0.055095 0.005536 1
200 216 0.01404 0.0381 0.00415 1
200 218 0.007812 0.048216 0.009222 1
200 230 0.004045 0.024969 0.0047755 1
200 231 0.00664 0.040984 0.0078385 1
200 234 0.00272 0.016789 0.003211 1
200 236 0.004045 0.024969 0.0047755 1
201 203 0.015644 0.045455 0.0042885 1
202 204 0.014883 0.043243 0.0040795 1
203 204 0.006765 0.019656 0.0018545 1
204 205 0.029173 0.084766 0.007997 1
204 207 0.001691 0.00459 0.0005 1
204 227 0.007272 0.02113 0.0019935 1
206 215 0.03314 0.12249 0.011355 1
207 215 0.027615 0.11025 0.0128545 1
208 209 0.008066 0.034554 0.003472 1
209 231 0.000712 0.005456 0.0005355 1
210 211 0.012555 0.07749 0.014821 1
211 212 0.008153 0.030174 0.0025295 1
211 232 0.000279 0.001722 0.0003295 1
212 237 0.00226 0.013948 0.0026675 1
214 228 0.006696 0.041328 0.0079045 1
214 234 0.004101 0.025313 0.0048415 1
215 216 0.01168 0.04664 0.00544 1
215 217 0.00246 0.01374 0.003245 1
215 219 0.00435 0.02435 0.00575 1
215 222 0.00331 0.01225 0.001315 1
215 223 0.00307 0.01136 0.00122 1
215 228 0.015066 0.092988 0.017785 1
217 218 0.00781 0.04371 0.010325 1
217 240 0.001786 0.011021 0.002108 1
218 236 0.005656 0.03491 0.006677 1
219 221 0.0036 0.020136 0.0047555 1
220 218 0.00286 0.016 0.003779 1
222 223 0.00265 0.0098 0.00105 1
224 228 0.038941 0.16681 0.0167615 1
225 226 0.01142 0.03317 0.00313 1
226 227 0.00558 0.01622 0.00153 1
230 236 0.00239 0.014751 0.002821 1
231 235 0.000122 0.00033 0.0394 1
233 238 0.017038 0.05862 0.0071995 1];
lfybus % form the bus admittance matrix
lfnewton % Load flow solution by Newton-Raphson method
busout % Prints the power flow solution on the screen
lineflow % computes and displays the line flow and losses
Warning: Matrix is singular to working precision.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)
Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.
> In lfnewton (line 114)
In Untitled2 (line 502)

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Answers (1)

Walter Roberson
Walter Roberson on 17 Apr 2018
Edited: Walter Roberson on 17 Apr 2018

It means that the lfnewton routine used the \ (matrix left divide) operator to calculate directions, but the matrix on the left side is singular. https://www.mathworks.com/matlabcentral/answers/318736-i-get-warning-matrix-is-singular-close-to-singular-or-badly-scaled-results-may-be-inaccurate-rco#comment_417793

Or possibly the calculation of the terms overflowed, leading to infinities that tried to cancel, leading to a nan output.

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