Power quality regulation system

A power quality adjustment and capacity technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of slow compensation speed, poor intelligence, high cost and power consumption

Inactive Publication Date: 2015-05-06
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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AI Technical Summary

Problems solved by technology

[0003] In terms of reactive power compensation, the thyristor capacitor switching device used for static reactive power compensation has slow compensation speed, large impact, poor compensation accuracy, serious under-compensation and over-compensation, stepped compensation, and poor intelligence
However, the cost and power consumption of the dynamic var compensator SVG are relatively high, and it is impossible to configure the harmonic and reactive power management capacity according to the maximum value on the three-phase power line according to the user load, resulting in a waste of capacity

Method used

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Embodiment Construction

[0022] see figure 1 In order to better understand the technical solution of the present invention, the inventors of the present invention will describe in detail below through specific embodiments in conjunction with the accompanying drawings:

[0023] A power quality regulation system of the present invention includes the following components:

[0024] Active filter 1 integrated with the main controller, referred to as APF, dynamic var compensation device 2, referred to as SVG; thyristor capacitor switching device 3 for static var compensation, referred to as TSC; and three-phase load unbalance compensation device 4, and a voltage regulator 5 for dynamically and accurately adjusting the outgoing voltage of the user load of the three-phase power line. Among them, the active filter 1, the dynamic reactive power compensation device 2, the thyristor capacitor switching device 3 and the three-phase load unbalance compensation device 4 are respectively connected to the three-phase...

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Abstract

The invention discloses a power quality regulation system comprising an active filter, a dynamic reactive power compensation device, a thyristor capacitor switching device, a voltage regulator position on a user load side of a three-phase power line and an on-load regulated capacity transformer positioned on the three-phase power line. N groups of capacitors are arranged on the thyristor capacitor switching device; the active filter, the dynamic reactive power compensation device and the thyristor capacitor switching device are all connected with the three-phase power line; a master controller is arranged on the active filter, the dynamic reactive power compensation device and the thyristor capacitor switching device are connected with the master controller respectively through CAN buses, and a voltage measurement transformer and a current measurement transformer are arranged between the master controller and the grid side of the three-phase power line.

Description

technical field [0001] The invention relates to a power quality regulating system in the field of power electronics. Background technique [0002] At present, the intelligent devices used to improve power quality in low-voltage power distribution systems mainly include: dynamic reactive power compensation devices, thyristor capacitor switching devices for static reactive power compensation, harmonic control devices, three-phase load unbalance compensation devices, regulator etc. [0003] In terms of reactive power compensation, the thyristor capacitor switching device used for static reactive power compensation has slow compensation speed, large impact, poor compensation accuracy, serious under-compensation and over-compensation, stepped compensation, and poor intelligence. However, the cost and power consumption of the dynamic var compensator SVG are relatively high, and it is impossible to configure the harmonic and reactive power management capacity according to the maxi...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/01
CPCH02J3/01H02J3/1864H02J3/26Y02E40/30Y02E40/40
Inventor 王伟峰陈永福冯文俊解蕾杨嘉俊廖文廖强强仲隽伟
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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