Distribution automation related

In the future, the distribution network will develop from the current smart distribution network to the active distribution network, and will show the following technical characteristics:
First, the large-scale application of distributed power, energy storage systems and microgrids in the distribution network. The level of network automation requires higher and more flexible;
second, with the popularization of electric vehicles, the distribution network will have the ability to carry the charging load of electric vehicles;
third, the two-way interaction of energy consumption mode, users will usher in a more technologically efficient Intelligent power distribution system;
Fourth, with the popularization of advanced information and automation technology, the integration of power grid infrastructure will become higher and higher.


"Three remote" function: refers to the switch position information (i.e. remote signaling YX) and current and voltage (i.e. telemetry YC) collected by the power distribution terminal, and upload to the main station of power distribution automation through the communication system. At the same time, the main station system of power distribution automation performs switching operations on the switch through the communication system (ie, remote control YK).


Distribution terminal equipment refers to the general name of various feeder remote terminals, distribution transformer remote terminals, and medium-voltage monitoring units (distribution stations) used in the feeder loop of the distribution network, among which:
FTU refers to the installation in the distribution network It is a remote terminal with functions such as remote signaling, telemetry, remote control and fault current detection (or fault detection using a fault indicator) on the pole switch of the feeder circuit;
DTU refers to the ring network cabinet installed in the feeder circuit of the distribution network , Switching station and power distribution station site, remote terminal with functions such as remote signaling, telemetry, remote control and fault current detection (or fault detection by fault indicator);
TTU refers to the monitoring terminal installed on the distribution transformer.
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35KV is absolutely different from 110KV, and the height of the tower is also different. Therefore, the cost of 110KV is 35KV higher, generally 3-5 times.

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The 10KV substation is mostly called the power distribution station, which generally consists of a transformer room, a high-voltage power distribution room, a low-voltage power distribution room and a duty room.

10KV switch station, also known as switch station. It is designed for the stable operation of the system. It only plays the role of connecting different parts of the system, and does not have the function of lifting and lowering voltage. There is no transformer in this station.

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The substation is 35kv, 35kv incoming line twice, one main and one standby, 10kv outgoing line 10 times. Install two main transformers (2x4000KVA), on-load voltage regulation 35kv±3×2.5%/10.5kv.
There are 10 outgoing lines on the 10kv bus of the substation, including three for 400 KVA, two for 500 KVA

and 630 KVA, and one for 800 KVA, 1250 KVA and 1600 KVA. The 10kv system adopts the single-bus segment wiring method, and the system is considered as infinity.

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I have been responsible for the operation and management of seven 35kV and 110kV user substations, and

the , but I have never done 35kV substations. Unattended transformation of substations. So the answer may not meet your

requirements . But
(1) If it is a power station, it has been designed as unattended remote three-distance. If it is a user station, the power department usually requires someone to be on duty.
(2) If you want to do unattended transformation, it is actually not difficult. I have done unattended transformation of 10kV substations. It is nothing more than updating the protection relays of high-voltage equipment to microcomputer integrated protection relays. ABB, Siemens and Schneider all produce similar Comprehensive insurance, set up the RTU on site and connect it, install a SCADA system in the remote control position, and you are done.

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35KV integrated automation system: It adopts layered distribution and open structure design. It is mainly composed of substation layer, communication management layer and field control layer. The main equipment between each layer is as follows:
Substation layer: redundant configuration of active and standby servers, RHP9000 power monitoring system, telecontrol system

Communication management layer: RHP9200 intelligent communication management machine, R series industrial optical fiber ring network switch, R series industrial Ethernet switch, R series optical fiber transceiver, R series serial port server.

On-site control layer: RGP series general-purpose comprehensive protection measurement and control device, RVU500 series voltage comprehensive measurement and control unit, RGP602 main transformer differential protection device, RHP911X series protection measurement and control device, RHP912X series transformer protection device, RHP914X series motor protection measurement and control device, RHP915X series power generation Machine protection measurement and control device,

RHP9114 backup power automatic switching protection measurement and control device, SJR series power meter, JRGZDW DC screen, JRCK800 intelligent control device, third-party intelligent equipment.

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The 35kV line is not so important, it is basically a feeder, and the protection configuration is relatively simple and basically overcurrent protection. It can be judged by several actions.

I am 220 66 10 in the northeast, and 220 110 35 in the south. For our 10kV line, only overcurrent protection is provided. The short line has only one section, and the longer section and three sections.

35kv substations are suitable for larger industrial and mining enterprises. For example, there are larger electric machines and other electrical equipment in the enterprise. Some large enterprises have their own 110\220kV substations, and even have their own power plants. 10kv does not need to set up a separate substation, only a power distribution room. General communities and large enterprises have their own 10kv power distribution rooms, using box-type, dry-type or oil-filled transformers.



If the 35kV side is the line transformer wiring, then the main transformer protection has longitudinal difference, gas as the main protection, overcurrent, zero current, overload, pressure release, abnormal oil level, on-load voltage regulator gas and other backup protections. The switch is SF6, then there is an alarm for SF6 gas pressure.


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