Why use 132kV voltage to connect to wind farms

Large-scale wind farms are generally connected to the 110kV power grid, and the wind farms are integrated into the 220kV power grid after being assembled, and some are directly connected to the 220kV, which is not regulated.

The Middle East, such as Iran, Iraq, etc., and some African countries such as Chad and Niger.

United Kingdom, part of the Commonwealth and former British colonies.

Middle East, South Asia, Africa section.

In order to reduce the loss of electrical energy.

Because at the same power, w = ui, the greater the voltage (u), the smaller the current (i), according to the wire calorific q is equal to the square of the current multiplied by the resistance times time (q = irt 2). The lower the current, the less heat generated by the wire, and the less energy is lost.

Reasons:1Solve the limitations of high-capacity power transmission for equipment manufacturing.

2.Reduce the delivery current and reduce the loss.

The power system adopts high-voltage or even ultra-high-voltage transmission mainly:

1) Solve the limitations of large-capacity power transmission for equipment manufacturing.

2) Reduce the transmission current and reduce the loss.

3) Improve the safety and reliability of the power grid. The construction of UHV power grid can fundamentally solve the problem of poor power grid security caused by the weak connection of 500kV AC across large regions, provide strong grid support for the receiving power grid in eastern China, and solve the problem of excessive short-circuit current of 500kV power grid in densely loaded areas.

4) Reduce the number of corridors and save a lot of land resources. Taking the power transmission projects of Xiluodu, Xiangjiaba, Wudongde and Baihetan hydropower stations as examples, compared with the use of 800kV UHVDC transmission technology and 500kV HVDC transmission technology, the transmission line can be reduced from 10 to 6 times, saving the transmission corridor covering an area of 300km2. Taking the AC transmission technology that transmits 10GW of electricity and the transmission distance of 800km as an example, the use of 500kV AC transmission technology requires 8 10 transmission lines, while the use of 1000kV AC transmission technology only needs 2 transmission lines, which can reduce the width of the transmission corridor by 300m and save the transmission corridor covering an area of 240km2.

5) Obtain significant economic benefits. The UHV power grid will achieve large-scale cross-regional networking, which can obtain huge networking benefits including peak staggering, peak shaving, mutual assistance between water and fire, mutual backup, and reduction of curtailment of hydropower, and reduce network loss. Replacing the 500kV AC ultra-high voltage transmission function with 1000kV AC UHV can reduce the transmission cost, reduce the repeated construction of some 500kV AC ultra-high voltage transmission channels, and save a lot of investment.

6) Reduce the pressure of railway coal transportation and promote the intensive development of coal. The construction of ultra-high voltage power grid can realize the mutual promotion of large power grids, large power sources and large coal mines, implement the integrated development of coal and electricity, improve the coal recovery rate, improve the safety production level of coal mines, and reduce the comprehensive cost of coal and electricity.

7) Promote the large-scale development of the western region, increase capital investment in the western region, turn resource advantages into economic advantages, and at the same time reduce the environmental protection pressure in the central and eastern regions, and promote the coordinated development of regional social economy.

8) Drive the comprehensive upgrading of China's electrical manufacturing technology. By relying on the construction of UHV power grid project, we can enhance China's independent innovation ability in science and technology, take the road of leapfrog development, comprehensively improve the manufacturing level of domestic power transmission and transformation equipment manufacturing enterprises, make the domestic ultra-high voltage equipment manufacturing technology more mature, realize the upgrading of China's AC and DC power transmission and transformation equipment manufacturing technology, and significantly improve international competitiveness.

The power is very large, if the voltage is small, the current is large, the line loss is very large, and even the power cannot be sent, and the total loss is lost.

220 121 is the rated voltage of the transformer, and the corresponding voltage level of the system is: 220 110 10kV.

This is a main transformer used in a power plant, the generator outlet voltage, so the low voltage side of the transformer must be. As for which gear is actually used on both sides of 110kV and 220kv, it is decided according to the actual needs of the local power grid. In the setting, 230kV and 115kV are +5% higher than the system rated voltage, which is normal.

Transformers, generators and other equipment that are regarded as power sources should be 5% higher than the system voltage due to the voltage drop caused by the line and load, such as the 10kV system power supply.

Because there is a voltage drop in the transmission process and the operation of the substation process, it should be higher than the rated voltage.

For 220kV and above lines, in order to ensure the continuity of power supply of transmission lines, short-term non-full-phase operation is allowed. Therefore, the split-phase circuit breaker is generally used, that is, if it is a single-phase instantaneous fault, the other two phases are still operating normally in the process of protecting and removing the fault. Of course, if it is a long-term and permanent failure, the three phases will still be removed.

132kV transmission voltage.

d/c【Chinese Explanation】Downconverter.

lineLine-in.

After tripping, do on-site preventive tests: DC resistance, conversion ratio, withstand voltage. None of the anomalies found?

I suspect that it is a short circuit between turns, just a few turns, and the above experiments may not be able to make the quality of the transformer, or do chromatographic analysis to confirm the quality of the transformer or misoperation

To emphasize, I hate wind farms the most The wind farms of the five major power generation companies have run n.

1. There is a problem with the transformer.

2. Problems with the contact switch of the booster station.

3. There is a problem with the insulation between the phases.

4. There is a problem with the load switch of the fan.

Most of my people are transformers.

I'm also a newbie -

I'm sorry, I don't know why.

Even if it's prescribed, there's a lot of engineering experience in it.

The maximum operating voltage of the power system shall be stipulated by the standards formulated by the state. The values are as follows:

Power system rated voltage (kv) - > maximum operating voltage of power system (kv).

The maximum operating voltage of the power system refers to the maximum operating voltage value at any point in the system at any time when the system is operating normally. Transient overvoltages (e.g. caused by switching operation) and abnormal transient voltage changes are excluded.

The rated voltage of the power system refers to the voltage level standard stipulated by the state for the generation standardization and unification of electrical equipment.