Hosting mode-based distributed power supply synchronizing method and device

Abstract

The invention provides a hosting mode-based distributed power supply synchronizing method and a hosting mode-based distributed power supply synchronizing device. The synchronizing device consists of a thyristor control reactor, a controller and a switch, wherein the thyristor control reactor comprises two thyristors; the controller is connected with the thyristor control reactor through the thyristors; and the switch is connected in series with the thyristor control reactor. The invention overcomes the influence of voltage change due to the fact that the distributed power supply accesses a main network, ensures that the distributed power supply transmits the active power and the passive power to the main network, provides convenience for scheduling operation of the main network, and realizes the synchronization of the distributed power supply.

Description

technical field

[0001] The invention relates to a grid-connected interface method and device for a distributed power source and a main network, in particular to a distributed power source grid-connected method and device based on a trusteeship mode. Background technique

[0002] The access of distributed power to the power grid will bring a series of impacts on the voltage, power quality, system protection and dispatching operation of the distribution network and even the transmission network, and will cause a huge change in the size and direction of the power flow in the distribution network, making the distribution network The steady-state voltage of the power grid also changes, which will inevitably affect the voltage stability of the system. While the grid-connected inverter transmits active power, it also improves the power quality of the grid through reactive power compensation and harmonic suppression. Its goal is to control the AC current output by the inverter circu...

Examples

Embodiment Construction

[0015] Explanation of symbols in the drawings: 1-thyristor-controlled reactor, 2-thyristor, 3-inductor, 4-capacitor, 5-controller, 6-switch.

[0016] Hereinafter, the present invention will be further described through specific embodiments in conjunction with the accompanying drawings.

[0017] see figure 1 , This embodiment consists of a thyristor controlled reactor 1, a controller 5 and a switch 6. The thyristor controlled reactor 1 includes two thyristors 2 , an inductor 3 and a capacitor 4 . The controller 5 is connected with the thyristor-controlled reactor 1 through the thyristor 2 . The switch 6 is connected in series with the thyristor controlled reactor 1 .

[0018] P ref and Q ref For the preset active power and reactive power values ​​of the main network in the hosting mode, the preset current is output to the controller after being adjusted by the limiter, and the controller 5 adjusts the thyristor control reactor 1 according to the preset current value to cha...

technical field

[0001] The invention relates to a grid-connected interface method and device for a distributed power source and a main network, in particular to a distributed power source grid-connected method and device based on a trusteeship mode. Background technique

[0002] The access of distributed power to the power grid will bring a series of impacts on the voltage, power quality, system protection and dispatching operation of the distribution network and even the transmission network, and will cause a huge change in the size and direction of the power flow in the distribution network, making the distribution network The steady-state voltage of the power grid also changes, which will inevitably affect the voltage stability of the system. While the grid-connected inverter transmits active power, it also improves the power quality of the grid through reactive power compensation and harmonic suppression. Its goal is to control the AC current output by the inverter circu...

Examples

Embodiment Construction

[0015] Explanation of symbols in the drawings: 1-thyristor-controlled reactor, 2-thyristor, 3-inductor, 4-capacitor, 5-controller, 6-switch.

[0016] Hereinafter, the present invention will be further described through specific embodiments in conjunction with the accompanying drawings.

[0017] see figure 1 , This embodiment consists of a thyristor controlled reactor 1, a controller 5 and a switch 6. The thyristor controlled reactor 1 includes two thyristors 2 , an inductor 3 and a capacitor 4 . The controller 5 is connected with the thyristor-controlled reactor 1 through the thyristor 2 . The switch 6 is connected in series with the thyristor controlled reactor 1 .

[0018] P ref and Q ref For the preset active power and reactive power values ​​of the main network in the hosting mode, the preset current is output to the controller after being adjusted by the limiter, and the controller 5 adjusts the thyristor control reactor 1 according to the preset current value to cha...

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