Transformer area system for governing three-phase imbalance and control method

A balanced, three-phase technology, applied in the direction of multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, single-network parallel feeding arrangement, etc., can solve three-phase imbalance and other problems

Inactive Publication Date: 2021-01-15
XUJI GRP +2
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Problems solved by technology

[0004] The purpose of the present invention is to provide a platform system for controlling three-phase imbalance, and solve

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  • Transformer area system for governing three-phase imbalance and control method
  • Transformer area system for governing three-phase imbalance and control method

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Embodiment Construction

[0029] 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 combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0030] figure 1 It shows a structure diagram of a low-voltage platform system with a high proportion of single-phase photovoltaic access. From figure 1 It can be seen that the system includes distribution network 1, circuit breaker 2, low-voltage distribution transformer 3, collector 4, station area centralized controller 5, SVG 6, branch a1 and branch a2. Distribution network 1 is connected to power transmission line ...

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Abstract

The invention discloses a transformer area system for governing three-phase imbalance and a control method. The system comprises a transformer area centralized controller, a dynamic compensation device, a phase-change switch, a collector and other devices, and the collector collects the current of each branch and communicates with the phase-change switch in each branch. The transformer area centralized controller and the collector are communicated with each other, and the transformer area centralized controller and the dynamic compensation device are communicated with each other. The transformer area centralized controller is adopted to control the phase change switch and the dynamic compensation device, and the problem of three-phase imbalance caused by high-proportion single-phase photovoltaic access to a low-voltage transformer area is solved.

Description

technical field [0001] The invention relates to the field of power quality, in particular to a station area system for controlling three-phase unbalance. Background technique [0002] Household rooftop photovoltaics have been greatly developed due to reasons such as no geographical restrictions, less space occupation, high economic benefits, and energy policy support. However, the output of photovoltaic power generation is affected by factors such as light intensity, ambient temperature, incident angle, and conversion efficiency. Power is random and volatile. The unbalanced low-voltage three-phase caused by the disorderly access of a high proportion of single-phase photovoltaics and different loads of electricity has gradually become prominent, and has become an increasingly urgent power quality problem that needs to be solved. Contents of the invention [0003] (1) Purpose of the invention [0004] The purpose of the present invention is to provide a platform system for...

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Application Information

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IPC IPC(8): H02J3/26H02J3/18H02J3/38
CPCH02J3/26H02J3/18H02J3/381H02J2300/22H02J2310/12Y02E10/56Y02E40/30Y02E40/50
Inventor 岳帅郭奕浓袁方方苑军军张萌赵江信
Owner XUJI GRP
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