502:
685:
32:
671:
657:
457:
572:
Each inverter consists of two series-connected six pulse inverters forming a twelve pulse inverter. As in many other HVDC facilities, quadrivalves (serial connections of four valves forming a unit) are used. Each valve consists of 7 series-connected thyristors designed for a current of 2,500 A and a
576:
The station has three transformers on the 60 Hz side. One transformer is the power supply of the station, and two 275 kV/55 kV transformers feed the valves. The transformers have their low-voltage windings connected one in a delta and other in a wye. All these transformers share a common tank.
583:
On each side filters for the 5th, 7th, 11th and 13th harmonic exist, which consist of a series connection of a capacitor, an inductor and a resistor. In addition, a high pass filter is used, which consists of a capacitor switched in series with a coil to which a resistor is switched in parallel.
330:
at the start of the 20th century. The Tenryū River was characterized by a high volume of flow and a fast current. Its mountainous upper reaches and tributaries were areas of steep valleys and abundant rainfall, and were sparsely populated. However, the bulk of investment in hydroelectric power
440:
train (several stations of which had to be relocated once the reservoir began to fill. Construction also involved the relocation of 240 households with 296 families. The official opening ceremonies on
October 28, 1957 were attended by
420:, which inherited the various dams and projects on the Tenryū River, all of which were located in Nagano Prefecture. To tap into the hydroelectric potential of the river in Shizuoka Prefecture, the government turned to the
553:). It was rated 300 MW with an operating voltage of ±125 kV. The converter station is connected to the 275 kV 50 Hz grid and the 275 kV level of the 60 Hz grid. Initially the converter used
516:
577:
On the 50 Hz side, two 275/54 kV transformers, in separate tanks, feed the valves, again with one in delta and the other in star connection of the low-voltage windings.
489:
The Sakuma Dam
Reservoir is a popular attraction for canoeing and camping, due to its proximity to downtown Hamamatsu and ease of access. The surrounding area is part of the
256:
878:
252:
888:
720:
993:
340:
645:
953:
843:
918:
1079:
1064:
640:
219:
79:
318:. Nearby a frequency converter station is installed, allowing interchange of power between Japan's 50 Hz and 60 Hz AC networks.
983:
436:, and construction was completed in 1956. Construction was facilitated by the steep V-shaped walls of the site, and its proximity to the
713:
478:
490:
836:
413:
893:
633:
432:, began work on a new dam in 1952, based on plans which had begun as early as 1921. The main contractor for the project was
1059:
706:
729:
421:
153:
416:
ordered the dissolution of Nippon
Hassoden, which was divided into regional power companies. Central Japan came under
1069:
829:
852:
377:
before it was nationalized into the pre-war government monopoly Japan
Electric Generation and Transmission Company
1074:
1003:
513:. In 1965 an HVDC back-to-back station was installed in the city about 1 kilometre south of the power plant (
477:. It supplies water to both the Sakuma Hydroelectric Power Station and serves as the lower reservoir for the
913:
1049:
450:
296:
690:
326:
The potential of the Tenryū River valley for hydroelectric power development was realized by the
928:
580:
The DC smoothing reactor has an inductance of 0.12 H and is designed for a current of 2,400 A.
1054:
601:
1023:
943:
417:
8:
60:
1028:
433:
629:
554:
510:
988:
908:
898:
442:
327:
300:
114:
64:
509:
The western part of Japan uses 60 Hz and the eastern part uses 50 Hz as
336:
1018:
938:
760:
288:
180:
873:
795:
755:
481:, with a rated capacity of 350,000 kW and 1,200,000 kW respectively.
429:
234:
698:
1043:
963:
775:
532:
518:
446:
315:
312:
292:
118:
94:
81:
805:
780:
501:
998:
973:
968:
821:
770:
750:
676:
662:
406:
978:
958:
948:
933:
923:
883:
810:
740:
470:
425:
402:
398:
394:
170:
573:
blocking voltage of 6 kV. Each of the two inverters uses 84 thyristors.
332:
1013:
863:
566:
405:
was started in 1938, but not completed until 1951 due to the start of
800:
785:
765:
745:
562:
558:
437:
31:
684:
304:
903:
474:
393:
in 1938. The first dam on the main stream of the Tenryu River, the
1008:
670:
339:
that development began on the Tenryū River. Private entrepreneur
311:. It is one of the tallest dams in Japan and supports a 350 MW
165:
456:
308:
67:
50:
284:
460:
Commemorative postage stamp on completion of Sakuma Dam
652:
561:. In 1993 it was converted to use light triggered
19:Dam in Shizuoka Prefecture-Aichi Prefecture Japan
1041:
397:was completed in 1935. This was followed by the
728:
386:
368:
352:
276:
602:"Hydropower & Dams in South and East Asia"
544:Sakuma HVDC back-to-back Static Inverter Plant
380:
362:
346:
270:
837:
714:
331:generation in the region was centered on the
851:
569:that had contained the mercury arc valves.
496:
449:and was the occasion for the issuance of a
844:
830:
721:
707:
30:
359:, which later became Yasaku Hydroelectric
500:
455:
1080:Energy infrastructure completed in 1957
646:Sacuma HVDC-back-to-back station scheme
626:Dams in Japan: Past, Present and Future
479:Shin-Toyone Hydroelectric Power Station
1042:
1065:Hydroelectric power stations in Japan
894:Gamagori Choseichi Dam (Aichi, Japan)
825:
702:
469:Sakuma Dam is a hollow-core concrete
343:founded the Tenryūgawa Electric Power
491:Tenryū-Okumikawa Quasi-National Park
565:, which were installed in the same
424:. The new company, in part through
412:After the end of World War II, the
13:
422:Electric Power Development Company
154:Electric Power Development Company
14:
1091:
683:
669:
655:
641:Sacuma HVDC-back-to-back station
624:Japan Commission on Large Dams.
607:. Hydropower and Dams. p. 9
505:Sakuma HVDC Back-to-Back Station
16:Dam on the Tenryū River in Japan
484:
414:American occupation authorities
1004:Toyooka-ike Dam (Aichi, Japan)
594:
1:
587:
914:Iruka-ike Dam (Aichi, Japan)
7:
1060:Dams in Shizuoka Prefecture
730:Dams in Shizuoka Prefecture
451:commemorative postage stamp
387:
369:
353:
335:, and it was not until the
291:, located on the border of
277:
10:
1096:
321:
257:Shin Toyoshi Power Station
859:
736:
464:
381:
363:
347:
271:
251:
243:
233:
225:
215:
210:
202:
194:
186:
176:
164:
159:
149:
141:
133:
125:
110:
73:
56:
46:
38:
29:
24:
1070:Dams in Aichi Prefecture
853:Dams in Aichi Prefecture
497:HVDC frequency converter
691:Renewable energy portal
134:Construction began
1075:Dams completed in 1957
929:Kotozawa Choseichi Dam
533:35.08250°N 137.79889°E
506:
461:
95:35.09944°N 137.79417°E
504:
473:with several central
459:
166:Type of dam
121:(after redevelopment)
1024:Yahata Choseichi Dam
944:Ohbara Choseichi Dam
628:. CRC Press (2009).
511:power grid frequency
418:Chubu Electric Power
388:Nippon Hassoden K.K.
370:Yasaku Suiroku Denki
297:Kitashitara District
253:Sakuma Power Station
889:Banba Choseichi Dam
538:35.08250; 137.79889
528: /
235:Catchment area
226:Total capacity
100:35.09944; 137.79417
91: /
61:Shizuoka Prefecture
1050:Converter stations
1029:Yanagisawa-ike Dam
994:Togo Choseichi Dam
555:mercury arc valves
507:
462:
434:Hazama Corporation
354:Tenryūgawa Denroku
1037:
1036:
819:
818:
761:Hatanagi No.2 Dam
756:Hatanagi No.1 Dam
634:978-0-415-49432-8
341:Fukuzawa Momosuke
303:on the island of
262:
261:
244:Surface area
160:Dam and spillways
142:Opening date
1087:
989:Takaraji-ike Dam
954:Ohno Toshuko Dam
909:Hattachi-ike Dam
899:Gokamura-ike Dam
846:
839:
832:
823:
822:
723:
716:
709:
700:
699:
693:
688:
687:
679:
674:
673:
665:
660:
659:
658:
617:
616:
614:
612:
606:
598:
557:manufactured by
552:
551:
549:
548:
547:
545:
540:
539:
534:
529:
526:
525:
524:
521:
443:Emperor Hirohito
392:
390:
384:
383:
376:
375:
372:
366:
365:
358:
356:
350:
349:
328:Meiji government
301:Aichi Prefecture
282:
280:
274:
273:
115:Power generation
106:
105:
103:
102:
101:
96:
92:
89:
88:
87:
84:
65:Aichi Prefecture
34:
22:
21:
1095:
1094:
1090:
1089:
1088:
1086:
1085:
1084:
1040:
1039:
1038:
1033:
1019:Yahagi No.2 Dam
939:Miyoshi-ike Dam
919:Komanba-ike Dam
855:
850:
820:
815:
732:
727:
697:
696:
689:
682:
675:
668:
661:
656:
654:
621:
620:
610:
608:
604:
600:
599:
595:
590:
543:
541:
537:
535:
531:
530:
527:
522:
519:
517:
515:
514:
499:
487:
467:
428:loans from the
378:
373:
360:
344:
324:
268:
255:
203:Dam volume
117:
99:
97:
93:
90:
85:
82:
80:
78:
77:
20:
17:
12:
11:
5:
1093:
1083:
1082:
1077:
1072:
1067:
1062:
1057:
1052:
1035:
1034:
1032:
1031:
1026:
1021:
1016:
1011:
1006:
1001:
996:
991:
986:
981:
976:
971:
966:
961:
956:
951:
946:
941:
936:
931:
926:
921:
916:
911:
906:
901:
896:
891:
886:
881:
876:
874:Shintoyone Dam
871:
866:
860:
857:
856:
849:
848:
841:
834:
826:
817:
816:
814:
813:
808:
803:
798:
796:Sasamagawa Dam
793:
788:
783:
778:
773:
768:
763:
758:
753:
748:
743:
737:
734:
733:
726:
725:
718:
711:
703:
695:
694:
680:
666:
651:
650:
649:
648:
643:
637:
636:
619:
618:
592:
591:
589:
586:
498:
495:
486:
483:
466:
463:
430:United Nations
323:
320:
260:
259:
249:
248:
245:
241:
240:
237:
231:
230:
227:
223:
222:
217:
213:
212:
208:
207:
204:
200:
199:
196:
192:
191:
188:
184:
183:
178:
174:
173:
168:
162:
161:
157:
156:
151:
147:
146:
143:
139:
138:
135:
131:
130:
127:
123:
122:
112:
108:
107:
75:
71:
70:
58:
54:
53:
48:
44:
43:
40:
36:
35:
27:
26:
18:
15:
9:
6:
4:
3:
2:
1092:
1081:
1078:
1076:
1073:
1071:
1068:
1066:
1063:
1061:
1058:
1056:
1053:
1051:
1048:
1047:
1045:
1030:
1027:
1025:
1022:
1020:
1017:
1015:
1012:
1010:
1007:
1005:
1002:
1000:
997:
995:
992:
990:
987:
985:
982:
980:
977:
975:
972:
970:
967:
965:
964:Onshi-ike Dam
962:
960:
957:
955:
952:
950:
947:
945:
942:
940:
937:
935:
932:
930:
927:
925:
922:
920:
917:
915:
912:
910:
907:
905:
902:
900:
897:
895:
892:
890:
887:
885:
882:
880:
879:Yamaguchi Dam
877:
875:
872:
870:
867:
865:
862:
861:
858:
854:
847:
842:
840:
835:
833:
828:
827:
824:
812:
809:
807:
804:
802:
799:
797:
794:
792:
789:
787:
784:
782:
779:
777:
776:Nagashima Dam
774:
772:
769:
767:
764:
762:
759:
757:
754:
752:
749:
747:
744:
742:
739:
738:
735:
731:
724:
719:
717:
712:
710:
705:
704:
701:
692:
686:
681:
678:
672:
667:
664:
653:
647:
644:
642:
639:
638:
635:
631:
627:
623:
622:
603:
597:
593:
585:
581:
578:
574:
570:
568:
564:
560:
556:
550:
512:
503:
494:
492:
482:
480:
476:
472:
458:
454:
452:
448:
447:Empress Kojun
444:
439:
435:
431:
427:
423:
419:
415:
410:
408:
404:
401:in 1938. The
400:
396:
389:
371:
355:
342:
338:
337:Taishō period
334:
329:
319:
317:
316:power station
314:
313:hydroelectric
310:
306:
302:
298:
294:
290:
286:
279:
267:
258:
254:
250:
246:
242:
238:
236:
232:
229:326,848,000 m
228:
224:
221:
218:
214:
209:
205:
201:
197:
193:
189:
185:
182:
179:
175:
172:
169:
167:
163:
158:
155:
152:
148:
144:
140:
136:
132:
128:
124:
120:
119:Flood control
116:
113:
109:
104:
76:
72:
69:
66:
62:
59:
55:
52:
49:
45:
41:
39:Official name
37:
33:
28:
23:
1055:Gravity dams
999:Tominaga Dam
974:Shintone Dam
969:Shin-ike Dam
868:
790:
771:Misakubo Dam
751:Funagira Dam
677:Water portal
663:Japan portal
625:
609:. Retrieved
596:
582:
579:
575:
571:
508:
488:
485:Surroundings
468:
411:
407:World War II
325:
289:Tenryū River
265:
263:
247:715 hectares
198:293.5 meters
190:155.5 meters
181:Tenryū River
979:Shitara Dam
959:Ohshima Dam
949:Ohi-ike Dam
934:Maeyama Dam
924:Koshido Dam
884:Ameyama Dam
811:Tashiro Dam
741:Akaishi Dam
536: /
523:137°47′56″E
471:gravity dam
426:foreign aid
403:Hiraoka Dam
399:Iwakura Dam
395:Yasuoka Dam
278:Sakuma damu
220:Lake Sakuma
206:1,120,000 m
171:Gravity dam
150:Operator(s)
129:Operational
98: /
86:137°47′39″E
74:Coordinates
1044:Categories
1014:Yahagi Dam
869:Sakuma Dam
864:Kuroda Dam
806:Shiogō Dam
791:Sakuma Dam
781:Oigawa Dam
588:References
567:valve hall
563:thyristors
542: (
520:35°04′57″N
266:Sakuma Dam
83:35°05′58″N
25:Sakuma Dam
984:Souri Dam
801:Senzu Dam
786:Okuno Dam
766:Ikawa Dam
746:Akiba Dam
611:3 October
475:spillways
438:Iida Line
382:日本発送電株式会社
239:4156.5 km
211:Reservoir
904:Habu Dam
333:Ōi River
177:Impounds
57:Location
1009:Ure Dam
322:History
287:on the
216:Creates
111:Purpose
47:Country
632:
465:Design
364:矢作水力電気
305:Honshū
293:Toyone
195:Length
187:Height
126:Status
605:(PDF)
348:天竜川電力
309:Japan
283:is a
272:佐久間ダム
68:Japan
51:Japan
42:佐久間ダム
630:ISBN
613:2010
559:ASEA
445:and
264:The
145:1957
137:1952
285:dam
1046::
493:.
453:.
409:.
385:,
367:,
351:,
307:,
299:,
295:,
275:,
845:e
838:t
831:v
722:e
715:t
708:v
615:.
546:)
391:)
379:(
374:)
361:(
357:)
345:(
281:)
269:(
63:-
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
