What is included in the electrical part of a 110kv substation

2 Power System Primary Part 6

Brief description of the project area 7

Status of the power system 8

Power Supply Status 8

Grid Status 9

Electricity Consumption Status 9

The main problems existing in the industrial zone 9

Power System Development Plan 10

Electricity Requirements** 11

Power Planning 14

Power Balance 14

Power Grid Construction Planning 17

The necessity of project construction 17

The role of the project in the power system and the scope of power supply 17

Analysis of the access system scheme 18

Access System Scheme 18

Comparative analysis of access system schemes 20

Project construction scale 21

Recommended Scheme Electrical Calculations 25

System requirements for substation electrical main wiring and related electrical equipment parameters 25 electrical main wiring and layout 25

Main transformer parameter selection 27

Short-circuit current level 28

Substation neutral grounding method 31

Conductor Section Selection and Circuit Type 31

Low-voltage reactive power compensation configuration option 33

Reuse of idle materials 33

Reasonable timing of the project to put into production 33

System-related recommendations 33

3 Power System Secondary Part 34

System Overview 34

Scheduling management relationship 35

System relay protection and safety automatic device 35

Current Situation and Existing Problems 35

System Relay Protection Configuration Scheme 36

Protection and fault information management substation system 37

Safety automatics 37

Technical requirements for communication channels 37

Technical requirements for PT, CT and other related equipment 38

Scheduler augmentation requirement 39

Scheduling automation 39

Status of automation systems 39

Telecontrol system 40

Electric energy metering systems 41

Channel requirement 42

Substation secondary system safety protection 42

Configuration of automation equipment 43

System Communication 43

Overview 43Business Requirements Analysis 43

The State of Communications 44

Means of communication 44

Fiber Optic Communication Scheme 44

Microwave communication scheme 45

Carrier communication scheme 45

Scheduling Data Network Scheme 46

Integrated Data Network Scheme 46

Various Business Channel Scenarios 46

Ancillary facilities 47

Electrical main wiring, equipment selection and verification, short-circuit current calculation, lightning protection and so on.

Do you want to ask what the latest requirements for the construction of 110kv substations are, which is a national standard.

1. The full length of the cable trench should be equipped with a continuous grounding wire device, and the specifications of the grounding wire should meet the requirements of the specification. The metal bracket, the metal sheath and the armor layer of the cable should all be connected with the grounding device, which is to avoid the potential difference between the cable sheath and the metal bracket, so that the alternating current erosion or the unit difference is too high to endanger personal safety.

2. For cables laid in cable trenches that are not filled with yellow sand, bare armor or non-flammable outer sheath cables should be used for fire prevention.

3. If there is a joint on the cable line, in order to prevent the joint from affecting the adjacent cable when the joint fails, the joint can be protected with a fireproof protection box or other fireproof measures can be taken.

4. The bottom of the cable trench can be directly placed with cables, and at the same time, a branch trap frame can also be installed in the trench to increase the number of laying cables.

5. The cable is fixed on the bracket, and when the horizontal device is installed, the power cable and control cable with an outer diameter of no more than 50mm are supported every other time. Power cables with an outer diameter greater than 50mm, every other support. Single-core cables arranged in a regular triangle should be fastened with straps at regular intervals.

When it is installed vertically, it should be fixed at regular intervals.

6. The metal structures in the cable trench need to be galvanized or coated with anti-rust paint anti-corrosion measures.

7. The power cable and the control cable should be installed on the posture bracket on both sides of the ditch respectively. If the conditions are not met, the power cable should be placed on the bracket above the control cable.

Interim regulations on the interval of backup lines of the sub-amponerium.

In order to strengthen the management of the line spacing in the substation, prevent the new"Safety regulations"If there are management loopholes within the time period before full implementation, these interim management provisions are hereby formulated. These provisions apply to the substation operation, maintenance and infrastructure installation units under the bureau.

The application and permission for the inspection and repair work, the issuance and reporting procedures of the reverse gate operation, as well as the state management and naming management of the equipment are all the same as the interval between the running lines.

2 For devices that are under the jurisdiction of the superior dispatch.

The unit in charge of substation operation shall use the substation as a unit to carry out unified naming and management of the standby line interval.

The old line was officially removed from the dispatch. The standby line interval is normally in the line maintenance state.

The interval between new standby lines that have not yet been newly developed is normally in the cold standby state.

In the work on the standby interval, the project sponsor shall notify the biotechnology department of the substation operation supervisor in writing in advance of the work content and planned working hours. After receiving the work ticket, the substation shall obtain the consent of the biotechnology department of the unit before allowing the work class to work. The safety measures on the standby interval shall be implemented by the substation according to the requirements of the work ticket after verification.

3 Interval from the alternate line that has been lapped with the running bus. The operation of the bus gate knife must be clearly ordered by the corresponding dispatching duty.

4. The parameter test work of the new line, if it involves the operation of the side knife of the standby line interval line, shall be coordinated separately.

5. These management regulations will be implemented on a global scale from now on, pending newness"Safety regulations"Adjustments will be made after full implementation.

The 110kV substation spacing equipment is not the responsibility of the non-power unit. The substation is supervised by the power supply department or the power grid company.

2. The substation is a place to change the voltage. In order to transmit the electric energy generated by the power plant to a distant place, the voltage must be raised and turned into high-voltage electricity, and the voltage must be reduced as needed near the user, and the work of raising and lowering the voltage depends on the substation. The main equipment of the substation is the switch and transformer.

3. The substation is a power facility in the power system that transforms voltage, accepts and distributes electric energy, controls the flow direction of electricity and adjusts the voltage. The substation is in a specific environment; It is the process of converting AC-DC-AC. Like submarine transmission cables as well as long-distance transmission scales.

Some use the form of high-voltage direct current transmission and transformation. DC transmission overcomes the capacitance loss of AC transmission. It has an energy-saving effect.

Therefore, the 110kV substation of the photovoltaic power station is supervised by the power supply department or the power grid company.

Hello is happy to answer for you, yes, the 110kv substation spacing equipment is responsible for the electricity unit, I hope you can be satisfied with my answer.

This depends on some relevant agreements between the enterprise and the ** land use, and indeed some projects are led by ** to lead the public works to the factory land outside the red line.

The main area of the station:

1. High-voltage switchgear area: This area includes high-voltage switchgear such as main transformers, circuit breakers, isolation switches, and grounding switches.

2. Low-voltage switchgear area: This area includes low-voltage switchgear, such as low-voltage circuit breakers, contactors, protection devices, etc.

3. Control room: The control room is the center of the substation, which is used to monitor and control the operation status of the substation.

4. Biqi transformer area: The transformer area is the installation area of the number of main transformer belts and devices, mainly including transformers, cooling equipment, fuel tanks, etc. The main transformer is used to convert the high-voltage current into the low-voltage current for further transmission and distribution.

5. Inlet and outlet area: The inlet and outlet area is the connection area between the substation and the power system, including inlet and outgoing switchgear, cables, insulators, etc.

6. Auxiliary facilities area: The auxiliary facilities area includes the office, warehouse, maintenance workshop, and fire-fighting equipment of the substation.

Some information shows that when the capacity is 10,000kw to 100,000kw, 110kv substation can be built;

The cost difference between the cost of building a 110kV substation is relatively large, the selection of components, the construction unit, the level of specifications, etc. are the key factors affecting the cost, generally a 110kV substation of 10,000, there are 40 million should be enough;

Building a 110kV substation has many advantages over using a 10kV:

1. The construction of 110kV substation is the inevitable choice for large power capacity, because only large-capacity transformers can drive large electrical equipment, and the selection of 10kV can not bring such a large capacity, if calculated in 10,000, the minimum 7 lines are required for 10kV power supply, and the cost is not low;

2. Although the cost of building a 110kV station is relatively high, from the perspective of the concept of "life cycle management", its operating cost is relatively low; In particular, the expenditure on electricity bills is obvious; First, the use of the main transformer can greatly reduce the expenditure of basic electricity bills, the second is that the electricity price of 110kV is about 2 cents lower than that of 10kv, do not underestimate this 2 cents, 63000kw power can save 63000 * 720 * yuan a month, a year is 10.88 million, and the difference in electricity charges for three years can recover the construction investment of the substation;

3. Generally speaking, the higher the voltage level, the higher the reliability of power supply, the better the power quality, the smaller the power loss, and the smaller the maintenance cost; There is almost no power rationing in the 110kV substation;

There is still room for expansion of KV substation, and 10KV power supply is already 7 roads, and then the 8th road will be added, and it will be very difficult to go through the electricity procedures, because the local power supply company builds a substation, basically all the exits are occupied by you, and it has become a power supply for you;

Main transformer - transforms the voltage effect, increases the voltage to facilitate high-voltage transmission to reduce losses, and reduces the voltage to supply users at all levels of voltage; Busbar - the role of gathering and distributing electrical energy; Circuit breaker - turn on and break the normal line load current, and cooperate with relay protection and automatic devices to quickly remove the fault when the fault fails, so as to prevent the fault from expanding, etc.; Disconnector - Cause obvious disconnection point during maintenance, and the opening and closing of the disconnector can flexibly change the operation mode of the junction; Voltage muter and current muter - take its secondary value for metering, protection, etc.; Equalizing ring, lightning arrester - to prevent overvoltage and lightning waves from damaging equipment; Station transformer - power supply station; Measurement and control devices, protection devices, telecontrol devices, background units, DC systems, communication equipment, etc.

There is also a bypass switch - when a line circuit breaker is overhauled, the load is poured to the bypass bus through its bypass switch to avoid a line power outage, and the grounding switch is used to prevent power transmission to the work place during equipment or line maintenance, which causes electric shock to the staff, and capacitor bank - to compensate for the reactive power boost voltage; Reactor - suppress reactive power to reduce voltage; ......

Main transformer, busbar, bus-side disconnector, circuit breaker, current interchanger, load-side disconnector.........

Count the electrical equipment in the substation.

Primary equipment: main transformer (neutral point isolation switch, gap protection, arc suppression coil complete set of equipment), circuit breaker (or switch cabinet, GIS, etc.), voltage transformer (including insurance), current transformer, lightning arrester, isolation switch, busbar, busbar, cable, capacitor bank (capacitor, reactance, discharge coil, etc.), station transformer (or grounding transformer), and some substations also have high-frequency protection devices.

Secondary equipment: integrated automation, five-proof lockout, inverter, small current grounding line selection, station electricity, DC (battery), inverter, telecontrol communication, etc.

It seems that there is a little too much, and there may be a little less, so there is a difference.