Reactive Power Coordinated Control Method and Device for Distributed Power Generation Devices

A technology of distributed power generation and coordinated control, applied in circuit devices, photovoltaic power generation, reactive power compensation, etc. Dealing with problems such as distribution network terminal voltage

CN107069816BActive Publication Date: 2018-02-16FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-02-16

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Abstract

The invention relates to a reactive power coordinated control method and device of a distributed power generation device. The method comprises the steps of detecting an apparent power currently output from the distributed power generation device and a current charge state value of an energy storage device when that a voltage value of the distributed power generation device exceeds a limit is detected; adjusting an output power of a photovoltaic side and then adjusting an active power output of the distributed power generation device when the current charge state value is larger than a preset electrical quantity normal zone upper limit value, otherwise adjusting the active power output of the distributed power generation device; and adjusting a reactive power output of the distributed power generation device when the apparent power is smaller than the upper limit value, or the voltage value exceeds a lower limit and a reactive power value is larger than zero, or the voltage value exceeds an upper limit and the reactive power value is smaller than zero or after the active power output of the distribution power generation device is adjusted. With the adoption of the scheme, the reactive power adjustment requirement of the distributed power generation device is met, the service lifetime of a transformer is also not shortened, and the problem of electric energy quality such as voltage deviation prevented to the greatest extent.
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Description

technical field

[0001] The invention relates to the technical field of distributed power generation, in particular to a reactive power coordination control method and device for a distributed power generation device. Background technique

[0002] At present, the main way to improve the power quality at the end of the distribution network is to adjust the voltage fluctuation caused by the access of distributed photovoltaic power sources by adjusting the taps of the on-load tap changer in the distribution network. The real-time, rapid and fine adjustment requirements cannot effectively deal with the situation that the voltage at the end of the distribution network exceeds the limit. At the same time, frequently adjusting the taps of the on-load tap changer will not only shorten the service life of the transformer, but even cause power quality problems such as voltage deviation. Contents of the invention

[0003] In view of this, the present invention provides a reactive pow...

Examples

Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0046] see figure 1 As shown, in one of the embodiments, a reactive power coordinated control method of a distributed power generation device is provided, and the reactive power coordinated control method of a distributed power generation device in this embodiment is described by taking the distributed power generation device as an example . Such as figure 1 As shown, the reactive power coordination control method without distributed power generation device in this embodiment includes:

[0047] Step S101: detecting the voltage value of the grid-connected point;

[00...