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Файл:Расчет переходных процессов в электроэнергетических системах методом интеграла Дюамеля. Учебное пособие
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– ɜ ɦɟɠɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɟ (ș
n–1
+ Ȗ
ș șn)
n–1
ᇱ
כ
ሺɅሻ
=
3
ξ
ቂsin ቀɅଵെ
כ
+2
ሻ
ሺ
ݔ
Ɏ
+ Ƚቁെ
6
Ɏ
െsin ቀെ
+ Ƚቁቃ+
6
3
ሿ
+
+
+
ሾ
ሺ
ሺ
2ݔ
כ
3
ξ
ሺ
ݔ
+2
כ
ሻ
+3
ቂsin ቀɅଶെ
ሻ
sin
+ Ƚሻെsin Ƚ
ɀ
ଵ
Ɏ
+ ȽെɅଵቁെ
6
Ɏ
െsin ቀɀଵെ
+ Ƚቁቃ+ ڮ
6
ڮ+
+
3
ሾ
ሺ
sin
ɀ
+ Ƚሻെsin Ƚ
ሺ
2ݔ
3
ξ
ሺ
ݔ
+2
כ
ሻ
+3
כ
ቂsin ቀɅെ
ሻ
ିଵ
Ɏ
6
+ ȽെɅ
ିଵ
(2.118)
ሿ
+
ቁെ
Ɏ
ڮ+
െsin ቀɀ
3
ξ
ሺ
ݔ
+2
כ
ሻ
െ
ିଵ
6
ቂsin ቀɅെ
+ Ƚቁቃ+ ڮ
Ɏ
+ ȽെɅ
6
ିଵ
ቁെ
Ɏ
െsin ቀɀ
ିଵ
െ
+ Ƚቁቃ,
6
݇= 1,2,…,݊.
ɇɚɣɞɟɦ ɫɨɫɬɚɜɥɹɸɳɭɸ ɬɨɤɚ ɩɪɢ ɡɚɦɵɤɚɧɢɢ ɧɚɤɨɪɨɬɤɨ
ɡɚɠɢɦɨɜ ɢɫɬɨɱɧɢɤɚ ɷ. ɞ. ɫ. ɜɵɩɪɹɦɢɬɟɥɹ ɢ ɧɟɧɭɥɟɜɵɯ
ɧɚɱɚɥɶɧɵɯ ɭɫɥɨɜɢɹɯ ɜ ɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɢ ɦɟɠɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɚɯ. ȼ ɷɬɨɦ ɫɥɭɱɚɟ ɭɪɚɜɧɟɧɢɹ (2.94) ɢ (2.95)
ɫɨɨɬɜɟɬɫɬɜɟɧɧɨ ɡɚɩɢɫɵɜɚɸɬɫɹ ɜ ɜɢɞɟ
91
ᇱᇱ
ሺɅሻ
݀݅
3
ݔ
+
൬
כ
כ
൰
2
= െ݁
݀Ʌ
כ
ɢ
ᇱᇱ
ሺɅሻ
݀݅
ሺ
+2
ݔ
כ
כ
ሻ
= െ݁
݀Ʌ
(2.120)
.
כ
ɉɪɢɦɟɧɹɹ ɩɪɟɨɛɪɚɡɨɜɚɧɢɟ Ʌɚɩɥɚɫɚ, ɛɭɞɟɦ ɢɦɟɬɶ
3
ᇱᇱ
൬ݔ
+
כ
ሺɅሻ
݅
൰
2
=
כ
൬
3
ᇱᇱ
ݔ
+
כ
ሺ0ሻ
݅
൰
כ
2
݁
െ
ɢ
݁
ᇱᇱ
ሻ
ሺݔ
כ
+2
ሺɅሻ=ሺ
݅
כ
ݔ
כ
+2
ᇱᇱ
ሻ
ሺ0ሻ
݅
כ
െ
כ
,
ɨɬɤɭɞɚ
(2.119)
כ
(2.121)
(2.122)
ᇱᇱ
ሺ0ሻ
݅
=
כ
ᇱᇱ
ሺሻ
݅
כ
െ
ቀݔ
݁
כ
+
כ
1
ή
ଶ
3
ቁ
2
(2.123)
ɢ
ᇱᇱ
ሺ0ሻ
݅
=
כ
ᇱᇱ
ሺሻ
݅
כ
െ
݁
כ
ሺ
ݔ
+2
כ
1
(2.124)
ή
.
ଶ
ሻ
ᇱᇱ
ɝɞɟ ݅
ሺ0ሻ
– ɧɚɱɚɥɶɧɨɟ ɡɧɚɱɟɧɢɟ ɫɨɫɬɚɜɥɹɸɳɟɣ ɜɵɩɪɹɦɥɟɧ-
כ
ɧɨɝɨ ɬɨɤɚ ɜ ɫɨɨɬɜɟɬɫɬɜɭɸɳɟɦ ɩɪɨɦɟɠɭɬɤɟ ɩɪɢ ɡɚɦɵɤɚɧɢɢ
ɷ. ɞ. ɫ. ɜɵɩɪɹɦɢɬɟɥɹ.
92
Ɍɚɤɢɦ ɨɛɪɚɡɨɦ, ɫɨɫɬɚɜɥɹɸɳɚɹ ɜɵɩɪɹɦɥɟɧɧɨɝɨ ɬɨɤɚ ɩɪɢ
ɡɚɦɵɤɚɧɢɢ ɧɚɤɨɪɨɬɤɨ ɡɚɠɢɦɨɜ ɢɫɬɨɱɧɢɤɚ ɷ. ɞ. ɫ. ɜɵɩɪɹɦɢɬɟɥɹ ɢ ɧɟɧɭɥɟɜɵɯ ɧɚɱɚɥɶɧɵɯ ɭɫɥɨɜɢɹɯ ɜ n-ɦ ɢɧɬɟɪɜɚɥɟ ɩɨ-
ᇱᇱ
ɜɬɨɪɹɟɦɨɫɬɢ ɢɡ ɭɫɥɨɜɢɹ, ɱɬɨ ɩɪɢ ș = (n – 1)ʌ/3 ɬɨɤ ݅
ᇱᇱ
ሺ0ሻ
= ݅
, ɛɭɞɟɬ ɨɩɪɟɞɟɥɹɬɶɫɹ ɫɨɨɬɧɨɲɟɧɢɹɦɢ
כ
– ɜ ɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɟ (ș
ș ș
n–1
n–1
כ
+ Ȗ
ሺɅሻ
n–1
=
)
ᇱᇱ
ሺɅሻ
݅
כ
െ
ቀݔ
כ
ᇱᇱ
ሺ
= ݅
כ
݁
כ
ሺ
ɅെɅ
3
+
ቁ
2
Ʌ
ିଵ
ሻ
െ
(2.125)
ሻ
;
ିଵ
– ɜ ɦɟɠɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɟ (ș
n–1
+ Ȗ
ș șn)
n–1
ᇱᇱ
ሺɅሻ
݅
כ
െ
ሺ
ݔ
כ
݁
כ
+2
= ݅
ᇱᇱ
כ
ሺ
ሻ
ሺ
Ʌ
ିଵ
ɅെɅ
+ ɀ
ିଵ
ିଵ
െɀ
ሻ
ିଵ
െ
ሻ
.
(2.126)
ɂɬɚɤ, ɪɟɲɟɧɢɟɦ ɭɪɚɜɧɟɧɢɣ (2.94) ɢ (2.95) ɜ ɫɨɨɬɜɟɬɫɬɜɭɸɳɟɦ ɩɪɨɦɟɠɭɬɤɟ n-ɝɨ ɢɧɬɟɪɜɚɥɚ ɩɨɜɬɨɪɹɟɦɨɫɬɢ ɛɭɞɟɬ ɚɥɝɟɛɪɚɢɱɟɫɤɚɹ ɫɭɦɦɚ ɧɚɣɞɟɧɧɵɯ ɫɨɫɬɚɜɥɹɸɳɢɯ ɜɵɩɪɹɦɥɟɧɧɨɝɨ ɬɨɤɚ
= ݅
ᇱ
כ
ሺɅሻ
ሺɅሻ
݅
כ
+ ݅
ᇱᇱ
ሺɅሻ
.
(2.127)
כ
Ɍɨɝɞɚ ɜɵɩɪɹɦɥɟɧɧɵɣ ɬɨɤ ɜ n-ɨɦ ɢɧɬɟɪɜɚɥɟ ɩɨɜɬɨɪɹɟɦɨɫɬɢ ɦɨɠɟɬ ɛɵɬɶ ɩɪɟɞɫɬɚɜɥɟɧ ɜɵɪɚɠɟɧɢɹɦɢ
93
– ɜ ɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɟ (ș
ș ș
n–1
n–1
+ Ȗ
n–1
)
=
ξ
+2
ሻ
ቂsin ቀɅଵെ
ሺ
ݔ
כ
ሺɅሻ
݅
כ
3
Ɏ
+ Ƚቁെ
6
Ɏ
െs݅݊ቀെ
+ Ƚቁቃ+
6
3
ሿ
+
+
+
ሾ
ሺ
ሺ
2ݔ
כ
3
ξ
ሺ
+2
ݔ
כ
ሻ
+3
ቂsin ቀɅଶെ
ሻ
sin
+ Ƚሻെsin Ƚ
ɀ
ଵ
Ɏ
+ ȽെɅଵቁെ
6
Ɏ
െ
െsin ቀɀ
ڮ+
+
3
ሾ
ሺ
2ݔ
כ
3
ξ
ሺ
ݔ
+2
כ
sin
ሻ
+3
ቂsin ቀɅെ
ሻ
ଵ
ሺ
+ Ƚቁቃ+ ڮ
6
ɀ
+ Ƚሻെsin Ƚ
ିଵ
Ɏ
+ ȽെɅ
6
ିଵ
ሿ
ቁെ
+
(2.128)
Ɏ
െsin ቀɀ
ିଵ
െ
+ Ƚቁቃ+ ڮ
6
3
ڮ+
ሺ
+݅
2ݔ
ᇱᇱ
כ
כ
+3
ሺ
Ʌ
ିଵ
ሺ
sin
ሻ
െ
ቀݔ
Ʌ+ ȽെɅ
݁
כ
3
+
ቁ
כ
2
ሻ
ିଵ
ሺ
ɅെɅ
ሻ
െsin Ƚ
ିଵ
ሿ
+
ሻ
,
ሾ
݇= 1,2,…,݊;
94
– ɜ ɦɟɠɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɟ (ș
n–1
+ Ȗ
ș șn)
n–1
=
ξ
ቂsin ቀɅଵെ
כ
+2
ሻ
ሺ
ݔ
ሺɅሻ
݅
כ
3
Ɏ
+ Ƚቁെ
6
Ɏ
െsin ቀെ
+ Ƚቁቃ+
6
3
ሿ
+
+
+
ሾ
ሺ
ሺ
2ݔ
כ
3
ξ
ሺ
+2
ݔ
כ
ሻ
+3
ቂsin ቀɅଶെ
ሻ
sin
+ Ƚሻെsin Ƚ
ɀ
ଵ
Ɏ
+ ȽെɅଵቁെ
6
Ɏ
െsin ቀɀଵെ
+ Ƚቁቃ+ ڮ
6
3
ሾ
ሺ
sin
ɀ
ڮ+
+
ሺ
2ݔ
ξ
ሺ
ݔ
+2
כ
+3
כ
3
ቂsin ቀɅെ
ሻ
ሻ
+ Ƚሻെsin Ƚ
ିଵ
Ɏ
+ ȽെɅ
6
ିଵ
ሿ
ቁെ
+
(2.129)
Ɏ
ڮ+
െsin ቀɀ
െsin ቀɀ
3
ξ
ሺ
ݔ
+2
כ
ିଵ
െ
ሺ
ݔ
כ
െ
݁
+2
ሻ
Ɏ
6
כ
െ
ିଵ
6
ቂsin ቀɅെ
+ Ƚቁቃ+ ݅
ሺ
ɅെɅ
ሻ
+ Ƚቁቃ+ ڮ
Ɏ
+ ȽെɅ
6
ᇱᇱ
ሺ
Ʌ
כ
ିଵ
െɀ
ିଵ
ିଵ
ିଵ
+ ɀ
ሻ
,
ቁെ
ିଵ
ሻ
െ
݇= 1,2,…,݊.
ɉɨɥɭɱɟɧɧɵɟ ɜɵɪɚɠɟɧɢɹ ɫɨɞɟɪɠɚɬ ɭɝɨɥ ɤɨɦɦɭɬɚɰɢɢ Ȗ,
ɜɟɥɢɱɢɧɚ ɤɨɬɨɪɨɝɨ ɦɟɧɹɟɬɫɹ ɩɪɢ ɩɟɪɟɯɨɞɟ ɨɬ ɨɞɧɨɝɨ ɢɧɬɟɪɜɚɥɚ ɤ ɞɪɭɝɨɦɭ. Ⱦɥɹ ɟɝɨ ɨɩɪɟɞɟɥɟɧɢɹ ɧɚɣɞɟɦ, ɧɚɩɪɢɦɟɪ,
ɬɨɤ i4כ, ɩɪɨɬɟɤɚɸɳɢɣ ɜ ɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɟ
(4ʌ/3 ș 4ʌ/3 + Ȗ4) 5-ɝɨ ɢɧɬɟɪɜɚɥɚ ɱɟɪɟɡ ɜɟɧɬɢɥɶ 4.
95
ɉɨɥɶɡɭɹɫɶ ɭɪɚɜɧɟɧɢɹɦɢ (2.84) ɢ (2.88) ɢ ɭɱɢɬɵɜɚɹ
(2.89), ɧɚɯɨɞɢɦ, ɱɬɨ
݀݅
൰
൬
Ʌെ
ସכ
݀Ԃ
Ʌ+
ሺɅሻ
Ɏ
6
Ɏ
+ Ƚെ
6
=
+ Ƚെ
4Ɏ
4Ɏ
3
൰
3
(2.130)
െ
൰
݁
כ
െ
.
2
3
ݔ
+
൬
כ
2
3
െ
=
ξ
ሺ
ݔ
+2ሻcos
כ
2
3
ξ
ሺ
+1ሻcos
ݔ
כ
2
൬
Ɋɟɲɢɦ ɭɪɚɜɧɟɧɢɟ (2.130) ɨɩɟɪɚɬɨɪɧɵɦ ɦɟɬɨɞɨɦ. Ⱦɥɹ
ɷɬɨɝɨ ɩɪɚɜɭɸ ɱɚɫɬɶ ɭɪɚɜɧɟɧɢɹ ɫɥɟɞɭɟɬ ɡɚɩɢɫɚɬɶ ɨɬɧɨɫɢɬɟɥɶɧɨ ɧɚɱɚɥɚ ɪɚɫɫɦɚɬɪɢɜɚɟɦɨɝɨ ɢɧɬɟɪɜɚɥɚ ɩɨɜɬɨɪɹɟɦɨɫɬɢ
3
ݔ
+
൬
כ
2
3
െ
=
ξ
ሺ
ݔ
2
3
ξ
ሺ
ݔ
כ
2
+2
כ
+1
ሻ
ሻ
cos ቀɅെ
ሺɅሻ
݀݅
ସכ
൰
݀Ԃ
cos ቀɅ+
=
Ɏ
6
Ɏ
+ Ƚቁെ
6
+ Ƚቁെ
(2.131)
݁
כ
.
2
Ɍɨɝɞɚ, ɩɨɞɜɟɪɝɚɹ ɭɪɚɜɧɟɧɢɟ (2.131) ɩɪɟɨɛɪɚɡɨɜɚɧɢɸ
Ʌɚɩɥɚɫɚ, ɩɨɥɭɱɢɦ
96
=
ቈ
ξ
2
൬ݔ
3
ሺ
3
+
כ
ሺሻ
݅
൰
2
ସכ
=
Ɏ
ሻ
+2
ݔ
כ
cos ቀ
+ Ƚቁെ
6
െ
3
ξ
ሺ
ݔ
2
כ
+1
ሻ
cos ቀെ
Ɏ
+ Ƚቁ
6
െ
3
ξ
െ
3
ξ
2
ሺ
ݔ
ቈ
2
ሺ
ݔ
+1
כ
݁
1
כ
െ
ή
2
+2
כ
ሻ
sin ቀെ
+
ሻ
ݔ
൬
sin ቀ
+
כ
Ɏ
6
Ɏ
6
+ Ƚቁ
3
൰
2
݅
ଶ
+ Ƚቁെ
ଶ
ሺ0ሻ
,
ସכ
+1
1
+1
െ
െ
(2.132)
ɨɬɤɭɞɚ
ݔ
ሺሻ
݅
െ
െ
ସכ
ݔ
2ݔ
ݔ
כ
2ݔ
כ
െξ3
+1
כ
+3
כ
=
+1
+3
ξ
sin ቀെ
െ
2ݔ
3
2ݔ
cos ቀെ
ݔ
+2
כ
2ݔ
+3
כ
݁
כ
+3
כ
כ
כ
Ɏ
6
ή
+3
Ɏ
6
sin ቀ
+ Ƚቁ൨
1
ଶ
+ Ƚቁ൨
+ ݅
+2
cos ቀ
Ɏ
+ Ƚቁെ
6
ሺ
ሺ0ሻ
ସכ
Ɏ
+ Ƚቁെ
6
1
ଶ
+1
1
ଶ
1
+1
.
െ
ሻ
െ
(2.133)
Ɉɪɢɝɢɧɚɥ ɷɬɨɝɨ ɢɡɨɛɪɚɠɟɧɢɹ ɢɡ ɭɫɥɨɜɢɹ, ɱɬɨ ɩɪɢ ș = 4ʌ/3
ɬɨɤ i4כ(ș) = i4כ(0) = iכ(0), ɢɦɟɟɬ ɜɢɞ
97
ݔ
ξ
+2
ሺɅሻ
݅
ସכ
=ξ3
2ݔ
כ
כ
+3
sin൬Ʌ+
Ɏ
+ Ƚെ
6
4Ɏ
3
െ
൰
Ɏ
+ Ƚቁቃെ
6
sin൬Ʌെ
݁
כ
ݔ
+3
כ
Ɏ
6
Ʌെ
൬
+ Ƚെ
4Ɏ
3
4Ɏ
3
െ
൰
(2.134)
4Ɏ
+ ݅
൰
כ
.
൬
൰
3
െsin ቀെ
െ
3
ξ
ݔ
+1
כ
2ݔ
כ
Ɏ
+ Ƚቁቃെ
6
െsin ቀ
+3
ɉɪɢ ș = 4ʌ/3 + Ȗ4 ɜɟɧɬɢɥɶ 4 ɝɚɫɧɟɬ ɢ ɬɨɤ i4כ = 0. ɂɫɩɨɥɶɡɭɹ
ɷɬɨ ɭɫɥɨɜɢɟ, ɢɡ (2.134) ɧɚɯɨɞɢɦ
Ɏ
0=ξ3
ሺ
ݔ
כ
+2
ሻ
ቂsin ቀɀ
+
+ Ƚቁെ
ସ
6
Ɏ
െsin ቀ
+ Ƚቁቃെ
6
Ɏ
ሺ
െ
3
ݔ
ξ
כ
+1
ሻ
ቂsin ቀɀସെ
+ Ƚቁെ
6
(2.135)
Ɏ
െsin ቀെ
+ Ƚቁቃെ
6
4Ɏ
െ݁כɀ
ሺ
+
2ݔ
ସ
כ
+3
ሻ
݅
כ
,
൬
൰
3
ɢɥɢ
3
ሺ
2ݔ
+3ሻሾcos
כ
2
+
3
ሾ
ሺ
sin
ɀସ+ Ƚሻെsin Ƚሿ= ݁כɀସെ
ሺ
ɀସ+ Ƚሻെcos Ƚ
ሿ
+
(2.136)
2
4Ɏ
כ
+3
ሻ
݅
כ
98
.
൬
൰
3
െሺ2ݔ
ȼ ɨɛɳɟɦ ɜɢɞɟ ɞɥɹ ɤɨɦɦɭɬɚɰɢɨɧɧɨɝɨ ɩɪɨɦɟɠɭɬɤɚ n-ɝɨ ɢɧ-
ɬɟɪɜɚɥɚ ɩɨɜɬɨɪɹɟɦɨɫɬɢ (ș
ș ș
n–1
n–1
+ Ȗ
) ɭɪɚɜɧɟɧɢɟ ɩɪɢ-
n–1
ɧɢɦɚɟɬ ɜɢɞ
3
ξ
ሺ
2ݔ
+3ሻሾcos
2
+
כ
3
ሾ
ሺ
sin
ɀ
2
ିଵ
െሺ2ݔ
ሺ
ɀ
+ Ƚሻെcos Ƚ
ିଵ
+ Ƚሻെsin Ƚሿ= ݁כɀ
ሻ
ሺ
ሻ
כ
+3
Ʌ
݅
כ
ିଵ
,
ିଵ
ሿ
+
(2.137)
െ
ሺ
ሻ
Ʌ
ɝɞɟ ݅
כ
– ɧɚɱɚɥɶɧɨɟ ɡɧɚɱɟɧɢɟ ɜɵɩɪɹɦɥɟɧɧɨɝɨ ɬɨɤɚ
ିଵ
ɜ ɤɨɦɦɭɬɚɰɢɨɧɧɨɦ ɩɪɨɦɟɠɭɬɤɟ n-ɝɨ ɢɧɬɟɪɜɚɥɚ ɩɨɜɬɨɪɹɟɦɨɫɬɢ.
ɉɨɥɭɱɟɧɧɨɟ ɭɪɚɜɧɟɧɢɟ (2.137) ɨɩɪɟɞɟɥɹɟɬ ɜɟɥɢɱɢɧɭ ɭɝɥɚ
ɤɨɦɦɭɬɚɰɢɢ ɜ ɥɸɛɨɦ ɢɧɬɟɪɜɚɥɟ ɩɨɜɬɨɪɹɟɦɨɫɬɢ ɜ ɡɚɜɢɫɢɦɨɫɬɢ ɨɬ ɧɚɱɚɥɶɧɨɝɨ ɡɧɚɱɟɧɢɹ ɜɵɩɪɹɦɥɟɧɧɨɝɨ ɬɨɤɚ i
(ș) (ɩɪɢ
כn
ș = (n – 1)ʌ /3). ȼ ɪɟɡɭɥɶɬɚɬɟ ɭɞɚɟɬɫɹ ɩɨɥɧɨɫɬɶɸ ɪɚɫɫɱɢɬɚɬɶ
ɪɚɫɫɦɚɬɪɢɜɚɟɦɵɣ ɩɟɪɟɯɨɞɧɵɣ ɩɪɨɰɟɫɫ.
ɇɚ ɪɢɫ. 2.14 ɩɪɢɜɟɞɟɧɚ ɤɪɢɜɚɹ ɜɵɩɪɹɦɥɟɧɧɨɝɨ ɬɨɤɚ ɩɪɢ
ɩɟɪɟɯɨɞɧɨɦ ɩɪɨɰɟɫɫɟ ɜɤɥɸɱɟɧɢɹ ɜɵɩɪɹɦɢɬɟɥɹ, ɪɚɫɫɱɢɬɚɧɧɚɹ ɩɨ (2.128), (2.129) ɢ (2.137) ɞɥɹ ɤɨɧɤɪɟɬɧɨɝɨ ɩɪɢɦɟɪɚ
(eכ = 1,22, x = 3, Į = 15°).
ɂɬɚɤ, ɫ ɩɨɦɨɳɶɸ ɢɧɬɟɝɪɚɥɚ Ⱦɸɚɦɟɥɹ ɩɨɥɭɱɟɧɵ ɫɨɨɬɧɨɲɟɧɢɹ, ɩɨɡɜɨɥɹɸɳɢɟ ɪɚɫɫɱɢɬɚɬɶ ɩɟɪɟɯɨɞɧɵɟ ɩɪɨɰɟɫɫɵ ɜ
ɫɢɫɬɟɦɚɯ, ɜ ɤɨɬɨɪɵɯ ɜɵɩɪɹɦɢɬɟɥɶ ɜɵɩɨɥɧɟɧ ɩɨ ɬɪɟɯɮɚɡɧɨɣ
ɦɨɫɬɨɜɨɣ ɫɯɟɦɟ.
99
Ɋɢɫ. 2.14
100
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