The whole process of generator grid connection, wind turbine grid connection?

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It must be connected to the grid at the same time, otherwise, the forced non-synchronous grid connection may produce a strong inrush current and damage the generator.

The reason why the generator should be connected to the grid at the same time is to reduce the impact on the generator when it is connected to the grid. Because the change frequency of alternating current is 50Hz, it is basically unwilling to achieve it by relying on people to judge whether it is at the same time, and it is extremely easy to be connected to the grid at the same time, and in serious cases, the electric power generated by the impulse current will torsion the coil and even the spindle of the generator.

Yes, but at least 3 bulbs should be used for nuclear phase, nuclear period, otherwise the consequences will be very serious, and pay attention to adjusting the output voltage of the generator to make its output power equal.

The conditions for the generator to be connected to the grid are: voltage, phase sequence, frequency can be connected to the grid, you only need to find the voltage and phase sequence to you can use the air switch to manually strengthen but be sure to find the phase sequence right.

If it is used as a backup power supply, there is no electricity on the grid, and it can be directly connected to the grid. If the capacity of some generators is small compared to the capacity of the power grid, it can also be directly connected to the grid.

That's not what you're saying

There are three ways for wind turbine grid-connected control devices: soft grid-connected, step-down operation and rectifier inverter. The grid-connected control of wind turbines directly affects whether wind turbines can transmit electricity to the transmission grid and whether the units are affected by the inrush current when they are connected to the grid.

The anemometer detects the wind speed, the wind vane detects the wind direction and performs yaw operation, when the wind speed reaches the start-up value, the pitch system starts to work, and the blades are changed to a suitable angle according to the wind speed, and the speed sensor detects the wind turbine speed and the generator speed.

When the speed reaches the output power condition, the excitation power supply begins to excite, the generator begins to output power, when the voltage reaches the grid-connected condition, the inverter performs the grid-connected operation, and the rest is to select the boost and the secondary boost to be integrated into the booster station and into the power grid according to the situation.

1. Conditions for generator grid connection:

1) The frequency of the generator is the same as the frequency of the system.

2) The outlet voltage of the generator is the same as the system voltage, and its maximum error should be within 5%.

3) The phase sequence of the generator is the same as that of the system.

4) The voltage phase of the generator is consistent with the phase of the system voltage.

When the above four conditions are met, the grid-connected switch can be closed to make the generator set merge into the system for operation.

2. Steps for generator grid connection:

1) Turn on the power supply of the excitation adjustment cabinet, confirm that the operation-exit switch is in the exit state at this time, and set the input (exit is at the exit.

state, pass in the exit state).

2) Put the excitation into the trolley, put the excitation into the low-voltage side switch, and close the demagnetization switch.

3) Put the local (main control to the spot), manual (automatic to automatic), run (exit to run), set input (exit to input), stator voltage will appreciate the default value, slowly increase the excitation voltage, until the stator voltage reaches the rated voltage of the generator, exit the set.

In this process, it is necessary to observe whether there is any abnormal change in the sampling of each group of generators, if there is, stop the voltage boost, find out the cause, and if necessary, directly jump the demagnetization switch.

The main operation of the synchronous screen (manual synchronous and automatic synchronous can be selected, before that, the generator incoming trolley is called to the working position, and the 122 switch is pushed to the working position).

1) Hit the place from afar.

2) Manual automatic to manual.

3) The locking switch is put into operation at the same time.

4) Select 1TK of Line 1

5), the handle to thick, observe the grid on both sides of the voltage abnormal, if not, and then the handle to fine, then the manual meter in the middle of the pointer will rotate clockwise, if not, you can adjust the generator frequency, near 12 o'clock direction (+-20 degrees), according to the manual closing automatic quasi-synchronous.

The remote local to the spot, manual automatic to automatic, the device is powered on at the same time, the locking switch is put into the same period, the synchronous switch is put into the selected channel, and the start synchronous button is pressed.

1) Check whether the current and voltage circuits of each group of generators are correct.

2) Put all the handles on the screen at the same time to the exit state, put the input on the excitation adjustment cabinet (exit in the exit state), restore the steam engine jump and demagnetization jump plate, and check whether the current, voltage and power of each group of generators are normal.

1) The frequency of the generator is the same as the frequency of the system.

2) The outlet voltage of the generator is the same as the system voltage, and its maximum error should be within 5%.

3. The residual field sequence of the generator phase is the same as the phase sequence of the system.

4) The voltage phase of the generator is consistent with the phase of the system voltage.

Generators have a wide range of uses in industrial and agricultural production, national defense, science and technology, and daily life. There are many forms of generators, but their working principles are all based on the laws of electromagnetic induction and electromagnetic forces. Therefore, the general principles of its construction are:

Magnetic circuits and circuits that use appropriate magnetic and conductive materials to generate electromagnetic power and achieve the purpose of energy conversion.

The grid-connected cabinet of the generator is an "ordinary" high-voltage switchgear with a built-in circuit breaker, which is called "grid-connected cabinet" because it connects the generator system and the power grid system, and is equipped with a complete grid-connected protection device, which plays a role in connecting the generator to the grid. Generally, the "grid-connected cabinet" is not a professional power plant, most of which are self-supplied power plants and some small hydropower plants, with a grid-connected voltage of between 6-35kv and a capacity of 1000kw-25000kw. The conditions for the grid connection of the generator set "Mr. Qiuwei11A" are very comprehensive, and the special point of the cabinet is that the protection installed is different from other outgoing switchgear, which is generally equipped with directional overcurrent protection, wide pulse speed limit and break protection at current, low-voltage and low-cycle oscillation de-column protection, synchronous out-of-step protection, etc., and some will be scattered and installed in various places.

Synchronous generator: refers to the alternator with the same speed of the rotor and the rotating magnetic field of the stator, which can be divided into two types: rotating armature and rotating magnetic field according to the structure.

The grid-connected mode of synchronous generator: quasi-same commetic mode is connected to the grid, using the microprocessor chip as the core, the closing phase angle is carried out in the first posture town, and the voltage and frequency of the object are variably adjusted to improve the accuracy and grid-connected speed of the same period.

Features: The frequency on both sides is the same, the voltage is the same, the trace infiltration coarse phase sequence is the same, the phase is the same, and the impact on the system is small.