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High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof

A compensation control and dynamic compensation technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, harmonic reduction devices, etc. The effect of grid terminal voltage and improving reactive power compensation capacity

Inactive Publication Date: 2011-01-05
哈尔滨同为电气股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing single PPF technology has reactive power overcompensation, and the single TSC technology adopts graded switching, which is not suitable for the continuous change of reactive power of the power grid, and provides a high-voltage power grid combined with PPF and TSC. Filtering and dynamic reactive power compensation control system and its control method

Method used

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  • High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof
  • High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof
  • High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof

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specific Embodiment approach 1

[0026] Specific implementation mode one: the following combination Figure 1 to Figure 2 Describe this embodiment, the high-voltage filtering and dynamic reactive power compensation control system combining PPF and TSC described in this embodiment includes a passive filter unit 1, a reactive power dynamic compensation unit 2, a signal conditioning circuit 3, and a DSP and CPLD control circuit 4 and level shifting circuit 5,

[0027] The passive filtering unit 1 and the reactive power dynamic compensation unit 2 are connected in parallel between the grid input terminal and the load terminal, and the signal conditioning circuit 3 is used to detect the three-phase current signal and the three-phase voltage signal at the input terminal of the grid, and the voltage of the signal conditioning circuit 3 The voltage and current signal input terminals of the DSP and the CPLD control circuit 4 are connected to the current signal output terminal, the PWM control signal output terminal of...

specific Embodiment approach 2

[0028] Specific implementation mode two: the following combination figure 2 Describe this embodiment. This embodiment is a further description of Embodiment 1. The passive filter unit 1 is composed of three star branches, and the three star branches are connected in star form. Each star branch is routed by a circuit breaker 1 -1, fuse 1-2, filter reactor 1-3 and two filter capacitors 1-4,

[0029] A circuit breaker 1-1, a fuse 1-2, a filter reactor 1-3 and two filter capacitors 1-4 in each star branch are connected in series in sequence. Other components and connections are the same as those in Embodiment 1.

specific Embodiment approach 3

[0030] Specific implementation mode three: the following combination figure 2 This embodiment is described. This embodiment is a further description of Embodiment 1. The reactive power dynamic compensation unit 2 is composed of M groups of thyristor switching capacitors TSC, and the compensation capacity of M groups of thyristor switching capacitors TSC is according to 2 n-1 Coding method grouping, n=1, 2, ..., N, where M is an integer greater than 1, N≤M, M groups of thyristor switching capacitors TSC are connected to the power grid in parallel,

[0031] Each group of thyristor switching capacitors TSC is composed of three angular branches connected in an angular shape, and each angular branch is composed of an inductance coil, two anti-parallel thyristors and capacitors in series. Other components and connections are the same as those in Embodiment 1.

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Abstract

The invention discloses a high voltage filter and dynamic reactive power compensation control system combining a PPF with a TSC and a control method thereof, belonging to the technical field of power electronics. The invention solves the problems that a traditional independent PPF technology has reactive power compensation reactive power over compensation, and an independent TSC technology adopts classification switching and is not adapted to reactive power continuous variation of a power grid. In a device thereof, a passive filtering unit and a reactive power dynamic compensation unit are in parallel connected between the input end and the load end of the power grid, a signal conditioning circuit is used for detecting three-phase current and voltage signals of the power grid, the output end of the signal conditioning circuit is connected with the input end of a DSP (Digital Signal Processing) and CPLD (Complex Programmable Logic Device) control circuit, the output end of the DSP and CPLD control circuit is connected with a level conversion circuit, and the output end of the level conversion circuit is connected with a control signal input end of the reactive power dynamic compensation unit. In the method, a reactive power compensation capacitor is controlled to be thrown into the power grid according to the position of obtained power grid parameters in a space nine zone. The invention is used for reactive power compensation of the power grid.

Description

technical field [0001] The invention relates to a high-voltage filtering and dynamic reactive power compensation control system and a control method combining PPF and TSC, and belongs to the technical field of power electronics. Background technique [0002] To achieve safe, reliable and economical LC parameter selection is the original intention of passive filter PPF design. Since the frequency and impedance of the power grid are perturbed to varying degrees during the actual operation of the power grid, if the PPF appears capacitive (non-fundamental wave condition) under the perturbation condition of a certain parameter, it is most likely that the PPF and the grid reactance are connected in parallel. Resonance, resulting in severe amplification of harmonic current, parallel resonance will cause the filter channel to burn out, and even cause the entire filter device itself to be difficult to switch. Since the passive filter PPF is generally fixed switching, there is a poss...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18H02H3/26
CPCY02E40/30Y02E40/40
Inventor 王立国徐殿国邹静任翔夏禹
Owner 哈尔滨同为电气股份有限公司
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