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Application Case of Nanda Automation PLC in Comprehensive Monitoring System of Hydropower Station

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Application Case of Nanda Automation PLC in Comprehensive Monitoring System of Hydropower Station

  • Categories:Hydropower
  • Author:
  • Origin:
  • Time of issue:2020-05-14 14:17
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(Summary description)Dahekou Hydropower Station is located in the Datan section of the Apeng River in Cangling Town, Youyang County, Chongqing City. It is the eighth-level power station planned for the main stream of Apeng River. Its upper cascade is Box Rock Power Station, and its next cascade is Tizidong Power Station. The power station is connected to the tail water of Xiangyanyan Hydropower Station, and the installed capacity is 3×27.5MW. Its main task is to generate electricity.

Application Case of Nanda Automation PLC in Comprehensive Monitoring System of Hydropower Station

(Summary description)Dahekou Hydropower Station is located in the Datan section of the Apeng River in Cangling Town, Youyang County, Chongqing City. It is the eighth-level power station planned for the main stream of Apeng River. Its upper cascade is Box Rock Power Station, and its next cascade is Tizidong Power Station. The power station is connected to the tail water of Xiangyanyan Hydropower Station, and the installed capacity is 3×27.5MW. Its main task is to generate electricity.

  • Categories:Hydropower
  • Author:
  • Origin:
  • Time of issue:2020-05-14 14:17
  • Views:
Information

 

Application Case-Dahekou Hydropower Station

 

Project Overview >>>

Dahekou Hydropower Station is located in the Datan section of the Apeng River in Cangling Town, Youyang County, Chongqing City. It is the eighth-level power station planned for the main stream of Apeng River. The upper cascade is the Box Rock Power Station, and the next cascade is the Lazidong Power Station. The power station is connected to the tail water of Xiangyanyan Hydropower Station, and the installed capacity is 3×27.5MW. Its main task is to generate electricity.

 

 

The power station is the largest eighth-level power station in the nine-level development of the Apeng River (the seventh level is the Xiangyan power station, the sixth level is the Qilitang power station (proposed), the fifth level is the Yutan power station, and the fourth level is the Zhou Bai Power Station), with a drainage area of 4,619 square kilometers, an average annual flow rate of 133 cubic meters per second, and an annual runoff of 4.2 billion cubic meters. The hub is arranged as a concrete hollow gravity dam, an internal dam-type factory building, and installed capacity of 3×27.5 MW. The barrage dam is a sluice dam with a height of 85 meters, a storage capacity of 115 million cubic meters, and a 5 hole 11x15 meter top sluice gate, which can safely discharge the extraordinary flood that has happened in 500 years. The normal storage level of the power station is 385.0 meters, the dead water level is 369.0 meters, the design water head is 55 meters, the guaranteed output is 13.6 megawatts, and the annual power generation is 375 million kwh.

 

Electrical main wiring: 3 hydro-generators (single unit capacity is 27.5MW) and 3 main transformers with a capacity of 31110kVA to form a unit wiring, the generator rated voltage is 10.5kV. The outgoing voltage level of the power station is 110kV, and there are 4 outgoing lines, respectively, to Jumuling Substation, Longtan Substation, Tizidong Hydropower Station and Xiangyanyan Hydropower Station. 110kV side adopts single bus section wiring.

 

This power station carries out automation technology transformation according to the principle of "unattended (less people) on duty". After the transformation of automation technology, the overall principle design of "unattended (less people) on duty" should be realized. The power station is controlled by a full computer monitoring system. When the centralized control center of the basin cascade hydropower station is completed, the centralized control center of the basin cascade hydropower station will complete the centralized monitoring and operation of the power station.

 

Economical redundancy solution >>>

  • The system adopts dual CPU hot standby redundancy scheme to achieve CPU redundancy and network redundancy to meet the requirements of the PLC system redundancy function of medium and large power stations. The hot standby redundant CPU is in a rack, which solves the space problem of the control cabinet and reduces the system cost.
  • Adopt PPM sub-pulse and MODBUS TCP network timing mode.
  • The auxiliary machine system adopts a single CPU with Ethernet interface to realize the system interconnection of the whole plant.

 

 

Application Case-Yunnan Jiduhe Second Hydropower Station

 

Project Overview >>>

Yunnan Lushui County Xinyuan Jiduhe Power Generation Co., Ltd. Jiduhe Second-level Hydropower Station is located in the lower reaches of Jidu River in Lianchong Township, Lushui County, Nujiang Lisu Autonomous Prefecture, Yunnan Province. The hub of the power plant is about 3km away from Liancong Township and 42km away from Liuku Town where Nujiang Prefecture Government is located. The project area is located on the left bank of the Nu River. The power station is a diversion type development, with a flow rate of 6.0m/s, a design head of 254.30m, a guaranteed output of 4.33MW, an annual power generation of 66.073 million KW·h, and an annual utilization hour of 5241h.

 

Single CPU dual network solution >>>

 

 

Application case-Guizhou Moziwan Hydropower Station

 

Project Overview>>>
Moziwan Hydropower Station is located in the Tujia Autonomous County along the Yanhe River, on the right bank of the Wujiang River. It is the third level of the development of the Batuo River cascade. It is also the last power station in Yanhe County, 30km away from the county. The design building of Moziwan Power Station is Grade IV. The watershed area above the dam site of the power station reservoir is 589.7 square kilometers, with a total storage capacity of 11.4 million cubic meters. The design head of the power station is 30.5m, and the design reference flow rate is 9.5 m3/s. The installed capacity is 2×2500kW, and the annual power generation is 2490kW·h. It is transported to the 35kV substation in Zhongjie Township of Yanhe County by the 35kV line of the first loop with a total length of 12km.

 

 

Single CPU single network solution >>>

 

 

 

 

Application case-State Grid Sichuan Aba Prefecture Yuanyangqiao, Yuntun Power Station

 

Project Overview >>>

As of the end of 2004, hydropower development and “agricultural network transformation” in Songpan County had 24 small hydropower stations in the county, with a total of 35 units, and 4 power stations were connected to the network. The county network installed 8 units/6375kW, with an annual power generation capacity of 3086kW.h. There are 4 backbone power stations: Yuanyangqiao Power Station (installed capacity 2*600kW), Yuntun Power Station (installed capacity 2*1250kW), Hongqiaoguan Power Station (installed capacity 2*250kW), Shuzhuba Power Station (installed capacity 3*250kW).

 

Economical single CPU dual network solution >>> 

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Time of issue:2020-06-24 00:00:00

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Time of issue:2020-06-22 00:00:00

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