Active and reactive current coordination control-based photovoltaic grid-connected inverter control method

A current coordination and control method technology, applied in the direction of reactive power adjustment/elimination/compensation, photovoltaic power generation, reactive power compensation, etc., can solve problems such as lack of compensation requirements, waste of photovoltaic power plants, backward construction of reactive power compensation devices, etc. Achieve the effect of improving transient stability and improving transient voltage

Inactive Publication Date: 2017-02-15
WIND POWER TECH CENT OF GANSU ELECTRIC POWER +3
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Problems solved by technology

Because the construction of reactive power compensation devices in domestic large and medium-sized photovoltaic power plants is backward or even does not meet the compensation requirements, the current research on reactive power and voltage control methods is mainly concentrated in the field of distributed photovoltaic power generation, and research on reactive power and voltage control in grid-connected photovoltaic power plants It is not yet widespread, so it is necessary to study reactive power ...

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  • Active and reactive current coordination control-based photovoltaic grid-connected inverter control method
  • Active and reactive current coordination control-based photovoltaic grid-connected inverter control method
  • Active and reactive current coordination control-based photovoltaic grid-connected inverter control method

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Embodiment Construction

[0041] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0042] Specifically, the photovoltaic grid-connected inverter control method based on active and reactive current coordinated control includes the following steps:

[0043] Step 1: Introduce a capacitive current control loop into a two-stage grid-connected inverter based on a grid voltage-oriented control strategy to form a dual current loop control;

[0044] Step 2: Control the normal operation condition and the transient operation condition respectively by giving the current reference value.

[0045] The two-stage grid-connected inverter uses the front-stage Boost circuit to realize the voltage control of the photovoltaic power station, and uses the rear-stage inv...

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Abstract

The invention discloses an active and reactive current coordination control-based photovoltaic grid-connected inverter control method. The method mainly comprises the steps of: firstly, introducing a capacitor current control loop into a two-stage grid-connected inverter based on a grid voltage orientation control strategy to form double current loop control; and secondly, setting a current reference value to give corresponding control strategies to a normal operation condition and a transient stability condition. The active and reactive current coordination control-based photovoltaic grid-connected inverter control method provided by the invention facilitates transient voltage recovery after a system is in a short circuit fault, and improves the transient stability of the system.

Description

technical field [0001] The present invention relates to the technical field of power system transient stability research field, in particular to a photovoltaic grid-connected inverter control method based on coordinated control of active and reactive currents. Background technique [0002] Photovoltaic power generation is an important form of solar energy utilization. Its principle is to use solar panels to convert the received light energy into electrical energy. Since light energy is inexhaustible compared with other traditional energy sources, photovoltaic power generation has the characteristics of low operating cost and inexhaustible source. With the improvement of technology and production process level, it has broad development prospects. [0003] At present, there are generally two ways to use photovoltaic power generation. One is distributed photovoltaic power generation, and the other is photovoltaic power generation connected to the grid, that is, grid-connected ...

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Application Information

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IPC IPC(8): H02J3/38H02J3/18
CPCH02J3/385H02J3/18Y02E40/30Y02E10/56
Inventor 汪宁渤刘俊丁坤路亮陈业夫周识远何世恩李津
Owner WIND POWER TECH CENT OF GANSU ELECTRIC POWER
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