Staggered single-cycle control complementary current generator and control method thereof

A current compensation, single-cycle control technology, applied in reactive power compensation, AC network to reduce harmonics/ripple, reactive power adjustment/elimination/compensation and other directions, can solve practical requirements, single control target, control Incorrect equations, etc.

Active Publication Date: 2011-02-09
山东华天科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] 1) The control target is too single to meet the diverse actual compensation needs;
[0023] 2) If the power supply voltage waveform is distorted, the compensated current waveform will also be distorted in the same way;
[0024] 3) The high-frequency ripple component in

Method used

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  • Staggered single-cycle control complementary current generator and control method thereof
  • Staggered single-cycle control complementary current generator and control method thereof
  • Staggered single-cycle control complementary current generator and control method thereof

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Embodiment Construction

[0101] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0102] figure 1 It is a structural schematic diagram of the first embodiment of the present invention, which is suitable for the compensation of three-phase four-wire power lines;

[0103] Such as figure 1 As shown, a kind of interleaved single-cycle control compensation current generator is characterized in that it consists of 1 energy storage capacitor group, 2 three-phase inverter bridge I, 3 three-phase inverter bridge II, 4 current transformer group I, 5 Current transformer group II, 6 three-phase inductors I, 7 three-phase inductors II, 8-13 drive units I-VI, 14-19 drive pulse generation units I-VI, 20 synchronous pulse generation units, 21 voltage parameter calculations Unit, 22 command current calculation unit, 23 DC voltage detection unit, 24 current detection unit I, 25 current detection unit II, 26 AC voltage detection unit, 27 current dete...

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Abstract

The invention relates to a staggered single-cycle control complementary current generator and a control method thereof. The invention has the advantages of small current tracking error, high tracking speed, fixed switching frequency, and the like and remarkably decreases the ripple component of the output compensation current in a staggered ripple cancellation mode. The staggered single-cycle control complementary current generator comprises a three-phase inverter bridge I and a three-phase inverter bridge II, the output ends of the two three-phase inverter bridges I and II are respectively connected in series with a current transformer group I and a current transformer group II and then respectively connected with a three-phase inductor I and a three-phase inductor II, the output ends ofthe three-phase inductors I and II are connected in parallel and then connected with a three-phase compensated power line, the three-phase inverter bridges are respectively connected with pulse driving devices which are respectively with corresponding current detection units I and II, synchronous pulse generating units, voltage parameter arithmetic elements and instruction current arithmetic elements, the current detection units are connected with the respective current transformer groups, and the two arithmetic elements are connected with corresponding detection units.

Description

technical field [0001] The invention relates to an interleaved single-cycle control compensating current generator and a control method thereof for actively tracking and compensating harmonic currents and reactive currents in a power system. Background technique [0002] The active compensation of harmonic current and reactive current in the power system by modern power electronic technology is an important content in the flexible power transmission technology (FACTS) and consumer power technology (D-FACTS) developed in recent years. For example, parallel active power filter (APF) and static synchronous compensator (STATCOM), etc., all belong to the compensation current generator manufactured by modern power electronic technology. [0003] In order to achieve high-efficiency and high-speed compensation effects, this type of compensation current generator often uses hysteresis tracking method or PWM method to modulate and drive the inverter bridge in order to generate the req...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/30Y02E40/40
Inventor 李建明鞠洪兵王德涛
Owner 山东华天科技集团股份有限公司
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