Novel reactive and unbalanced compensation control method
A technology for balancing compensation and control methods, applied in reactive power compensation, reactive power adjustment/elimination/compensation, and reduction of multi-phase network asymmetry. quality effect
Active Publication Date: 2020-04-21
武汉欣和开元电子有限公司
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Problems solved by technology
Usually unbalanced load will bring asymmetrical components including zero-sequence components and negative-sequence components, especially during the use of three-phase four-wire power grids, which not only affects the quality of power supply, but also is not conducive to energy saving and environmental protection
Method used
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[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0039] Embodiments of the present invention provide a novel reactive power and unbalance compensation control method.
[0040] Please refer to figure 1 , figure 1 It is a flow chart of a novel reactive power and unbalance compensation control method in an embodiment of the present invention, specifically including:
[0041] S101: Connect the three-phase three-level IGBT inverter bridge circuit 1, the ARM sampling control circuit 2 and the IGBT drive circuit 3 together to form a three-phase four-wire reactive power and unbalance compensator; the three-phase four-wire wireless The power and unbalance compensator together with the grid three-phase four-wire power supply 4 and the grid load 5 form a three-phase four-wire ...
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The invention relates to a novel reactive and unbalanced compensation control method. The method specifically comprises the following steps that: a three-phase three-level IGBT inverter bridge circuit, an ARM sampling control circuit and an IGBT drive circuit are connected together to form a three-phase four-wire reactive and unbalanced compensator; the three-phase four-wire system reactive and unbalanced compensator is electrically connected with the three-phase four-wire system power supply and load of a power grid; the ARM sampling control circuit drives the three-phase three-level IGBT inverter bridge circuit through the IGBT drive circuit by adopting a repetitive control method, outputs the output current of the three-phase three-level IGBT inverter bridge circuit to the three-phase four-wire system power supply side of the power grid, so that the control function of three-phase four-wire system reactive power and unbalanced compensation is realized. With the three-phase four-wiresystem reactive power and unbalanced compensator and compensation control method adopted, asymmetric components which include zero-sequence components and negative-sequence components and are causedby unbalance loads are eliminated, and power supply quality is improved while energy conservation and environmental protection are guaranteed.
Description
technical field [0001] The invention belongs to the field of power electronics, in particular to a novel reactive power and unbalance compensation control method. Background technique [0002] Most of the loads in the power grid need to consume reactive power. It is unreasonable for these reactive powers to be provided by generators and transmitted over long distances. The reasonable method should be to generate the required reactive power near the loads, and It is the reactive power compensation mentioned above. Usually unbalanced load will bring asymmetrical components including zero-sequence components and negative-sequence components, especially during the use of three-phase four-wire power grids, which not only affects the quality of power supply, but also is not conducive to energy conservation and environmental protection. Unbalance compensation can be considered as a special form of reactive power compensation. Contents of the invention [0003] The purpose of th...
Claims
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IPC IPC(8): H02J3/18H02J3/26
CPCH02J3/1821H02J3/1857H02J3/26Y02E40/30Y02E40/50
Inventor 刘飞毕平劲李新初杨如峰蒋绍涛
Owner 武汉欣和开元电子有限公司