Method for controlling coordinated operation of multiple DFACTS devices in urban regional power distribution network

Abstract

The invention relates to a method for controlling coordinated operation of multiple DFACTS devices in an urban regional power distribution network canonical topology. The method comprises the steps of (1) conducting coordination control on a DVR and an SSTS aiming at system voltage drop, (2) conducting coordination control on a DSTATCOM and multiple sets of TSCs aiming at system voltage flicker and reactive compensation, and (3) obtaining four coordination control methods for the DFACTS devices through the combination of the step (1) and the step (2). By the adoption of the method, coordination control of the multiple DFACTS devices in the urban regional power distribution network is achieved. The method is easy to implement and capable of guiding future engineering practice of the urban regional power distribution network.

Description

technical field [0001] The invention relates to the technical field of customized electric power, in particular to a multi-DFACTS equipment coordinated control method suitable for a typical topology of an urban regional power distribution network. Background technique [0002] With the increase of sensitive loads such as semiconductor manufacturing, IT industry, precision instruments, and PLC-controlled industrial equipment, power quality problems have become more and more prominent. The traditional method of increasing the number of wiring can improve power supply reliability, but voltage flicker Modern power quality requirements such as reactive power compensation and harmonic control cannot be met. In important power supply and consumption occasions, it is often necessary to establish an urban regional distribution network containing a variety of DFACTS equipment to meet the needs of sensitive loads for power quality. The DFACTS equipment used in the urban regional distri...

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Problems solved by technology

[0002] With the increase of sensitive loads such as semiconductor manufacturing, IT industry, precision instruments, and PLC-controlled industrial equipment, power quality problems have become more and more prominent. The traditional method of increasing the number of wiring can improve power supply reliability, but voltage flicker Modern power quality requirements such as reactive power compensation and harmonic control cannot be met. In important power supply and consumption occasions, it is often necessary to establish an urban regional distribution network containing a variety of DFACTS equipment to meet the needs of sensitive loads for power quality.

The DFACTS equipment used in the urban regional distribution network mainly includes APF, DVR, SSTS, STATCOM, SVC and battery energy storage, etc. They deal with different power quality problems respectively, and the applied voltage levels and working principles are different. In the regional distribution network, the electrical distance of each device is relatively close, and some devices have similar functions. If there is no coordinated control when power quality problems occur, it will not only affect the effect of power quality control, but may even aggravate power quality problems and cause system instability. Stable, high-quality power in the regional distribution network requires the cooperation of various DFACTS devices. Therefore, it is of great practical significance and engineering value to study the coordinated control strategy of multiple DFACTS devices

In recent years, many scholars have devoted themselves to studying the coordinated control strategy of multiple DFACTS devices, but most studies only considered two kinds of DFACTS devices, and there are few studies on the coordinated control strategies of multiple DFACTS devices.

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