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Self-coupling voltage regulation type reactive power dynamic compensation device

A technology of dynamic compensation and power compensation, applied in reactive power adjustment/elimination/compensation, reactive power compensation, circuit devices, etc., can solve problems such as overvoltage, large active power loss, high failure rate, etc., to reduce production costs, Effect of saving metal wire consumption

Inactive Publication Date: 2019-04-23
申建一
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are: inrush current impact when the device is put into operation, overvoltage phenomenon when it is cut off, high failure rate during operation, harmonic current generation, and large active power loss, ranging from 1.2% to 3.0%.

Method used

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  • Self-coupling voltage regulation type reactive power dynamic compensation device
  • Self-coupling voltage regulation type reactive power dynamic compensation device

Examples

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Effect test

Embodiment Construction

[0014] Non-limiting examples of the auto-voltage regulating reactive power dynamic compensation device of the present invention are as follows.

[0015] A coal mine 110KV substation 2×6000KVar / 6.3KV self-coupling voltage regulation SVC. A set of 6000KVar / 6.3KV self-coupling voltage-regulating SVC is configured for the 6.3KV section I busbar of the substation. Among them, the reactive power compensation and 3rd harmonic current filtering branch has a capacity of 3600KVar, the reactive power compensation and 5th harmonic current filtering branch has a capacity of 1800KVar, and the reactive power compensation and 7th harmonic current filtering branch has a capacity of 600KVar. The schematic diagram of its primary system is as follows: figure 2 shown.

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Abstract

The invention provides a self-coupling voltage regulation type reactive power dynamic compensation device. The device has the higher harmonic current filtering function, and belongs to the technical field of power equipment. The device is composed of an autotransformer, an on-load tap changer, a reactive power compensation filter branch, a computer measurement and control system and an on-load tapchanger controller. According to the invention, the function of the zero-voltage and zero-current input is realized. That means, no inrush current impact exists during input. The function of the zero-voltage and zero-current cut off is also realized. That means, no overvoltage phenomenon is generated during cutting off. The device is high in safety and reliability during operation, while no higher harmonic current is generated. The device is also low in active power loss. The device is suitable for reactive power dynamic compensation, high-order harmonic current filtering and system bus voltage adjusting devices of electric power, coal mines, steel and new energy (wind power and solar energy) power stations so as to improve the voltage quality of an electric power system and the operationeconomy of the electric power system.

Description

technical field [0001] The invention discloses an auto-coupling voltage regulating type reactive power dynamic compensation device, which belongs to the technical field of electric power equipment. In particular, a device can achieve zero voltage and zero current input, that is, no inrush impact will be generated when input; zero voltage and zero current cut off, that is, no overvoltage phenomenon will be generated when cut off. Background technique [0002] The types of existing reactive power dynamic compensation devices include thyristor phase-controlled reactor (TCR) and magneto-controlled reactor (MCR). Its working principle is a relatively constant capacitive current I C With an adjustable inductive current I that reflects the system reactive power demand and system bus voltage changes in real time L Synthesis, providing an adjustable inductive or capacitive reactive power to the system. Therefore, it is called a current-type reactive power dynamic compensation devi...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/01
CPCH02J3/01H02J3/1828H02J3/1878Y02E10/76Y02E40/30Y02E40/40
Inventor 陈君诚
Owner 申建一