Reactive power and harmonic compensation method, device and system
A harmonic compensation and sub-harmonic technology, which is applied in the field of reactive power and harmonic compensation methods, devices and systems, can solve the problems of increasing the construction cost of photovoltaic power station systems and the high cost of capacitor compensation cabinets
Active Publication Date: 2018-06-26
HUAWEI DIGITAL POWER TECH CO LTD
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, with the above scheme, the cost of the capacitance compensation cabinet is relatively high, which increases the construction cost of the photovoltaic power station system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0052] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of practice in sequences other than...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
An embodiment of the invention provides a reactive and harmonic wave compensation method, device and system. The method includes acquiring voltage and current of an AC combiner box output point; acquiring reactive compensation total amount and compensation total component of harmonic waves of all orders according to the voltage and current; distributing corresponding reactive compensation sub components and compensation sub components harmonic waves of all orders for inverters according to a preset rule, wherein the sum of the reactive compensation sub components distributed to all the inverters is the reactive compensation total amount and the sum of compensation sub components of harmonic waves of the same order is the compensation total amount of harmonic waves of the same order; distributing instructions to the inverters, wherein the instructions include reactive compensation sub components and compensation sub components of harmonic waves of all orders distributed to the inverters and each inverter determines the final output volume according to the reactive compensation sub components and compensation sub components of harmonic waves of all orders and the active power output of the inverters. Therefore, construction cost of a photovoltaic power station system is reduced.
Description
technical field [0001] Embodiments of the present invention relate to electric power technology, in particular to a reactive power and harmonic compensation method, device and system. Background technique [0002] In the power system, reactive power and harmonics are very harmful. Such as: reactive power will cause increased line loss, and harmonics will cause power equipment failures. Therefore, reactive power and harmonic compensation must be considered in power system construction. [0003] In the photovoltaic power station system, each battery panel is connected to an inverter, and the inverter converts the DC power of the battery panel into AC power. output to the medium-voltage grid output, however, since the inverter will generate harmonics during the conversion process, and the grid output will generate reactive power, therefore, reactive and harmonic compensation is required. In the prior art, through the A capacitor compensation cabinet is added between the AC c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/18
CPCY02E10/56Y02E40/30Y02E40/40
Inventor 徐运燕
Owner HUAWEI DIGITAL POWER TECH CO LTD