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Petroleum fracturing direct-current transmission power system

A power system and DC transmission technology, applied in parallel operation of DC power supplies, DC network circuit devices, DC circuits can reduce harmonics/ripples, etc., can solve large equipment capacity, large system harmonics, shortened service life of equipment, etc. problems, to reduce weight and investment costs, lower speed regulation performance requirements, and eliminate mutual influence

Inactive Publication Date: 2021-06-18
山东汉德自动化控制设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many disadvantages in this system, such as poor stability of multi-generator sets in parallel, poor impact resistance of the system, low transmission efficiency due to large reactive power capacity of the system, large system harmonics, large equipment capacity, large investment, and shortened service life of equipment. affect other control systems, etc.

Method used

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  • Petroleum fracturing direct-current transmission power system
  • Petroleum fracturing direct-current transmission power system
  • Petroleum fracturing direct-current transmission power system

Examples

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Effect test

Embodiment 1

[0059] A fracturing DC power system provided in this embodiment is composed of six subsystems: power generation, power transmission and distribution, power transformation and distribution, drive, energy storage, and energy management.

[0060] The power generation sub-system is composed of a prime mover and a generator, which is used to convert the mechanical energy of the prime mover into electrical energy. It is collectively called a generator set, and the generator set adopts a DC generator set.

[0061] The transmission and distribution electronic system consists of cables, busbars, DC circuit breakers and protection devices, which transmit electric energy to electrical equipment, and have the function of automatically identifying and isolating system faults.

[0062] The transformation and distribution electronic system realizes the transformation of power system, voltage and frequency according to the power demand of electric equipment, and supplies power to auxiliary equ...

Embodiment 2

[0073] In DC transmission, the system adopts 800VDC DC system for transmission, and the maximum voltage peak value can reach 1000VDC.

[0074] The power generation subsystem adopts DC generators, and the power transmission and distribution process adopts DC transmission.

[0075] DC power transmission and distribution fundamentally solves the problems of reactive power occupation and harmonics in traditional AC transmission and power generation systems;

[0076] The power transmission and distribution subsystem adopts a DC power distribution network. The DC transmission reduces the volume of the system and makes the system more flexible;

[0077] The power transformation and distribution system adopts the DC area power distribution device powered by DC. The system directly supplies DC power to the front end of the inverter, which reduces the traditional AC-DC-AC strategy of the inverter, and directly uses DC-AC to complete the power transmission. ;

[0078] The main drive sy...

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Abstract

The invention provides a petroleum fracturing direct-current transmission power system. The system comprises a power generation subsystem, a power transmission and distribution subsystem, a power transformation and distribution subsystem, a driving subsystem, an energy storage subsystem and an energy management subsystem; a power generation system and a driving system which are mutually independent in traditional electric fracturing are combined into a whole, and is unified as direct-current voltage in the form of electric energy; the direct current is transmitted to the driving end of each electric device through a bus; a driving device supplies power to the device through an inverter or a switch; and therefore, comprehensive utilization of energy of a whole well site is achieved.

Description

technical field [0001] The invention belongs to the technical field of power equipment, and in particular relates to a direct current transmission power system for petroleum fracturing. Background technique [0002] Oil fracturing has experienced the era of diesel engine-driven fracturing, high-voltage motor-driven fracturing and low-voltage motor-driven fracturing. In the low-voltage motor-driven fracturing pump system, the power supply part adopts a 600V AC system. The system features are: the power generation subsystem adopts an AC power frequency synchronous generator set; the power transmission and distribution subsystem adopts an AC power frequency distribution network; The power distribution subsystem adopts AC power frequency transformer power distribution device; the drive subsystem adopts frequency converter; the system has no energy storage subsystem; the energy management subsystem adopts the basic energy management system. System-wide monitoring and basic energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02J1/10H02J1/02H02J1/14H02J7/34H02P9/14H02P101/25
CPCH02J1/00H02J1/02H02J1/10H02J1/14H02J7/345H02P9/14H02P2101/25H02J1/106
Inventor 刘洪伟张爱珍范俊杰
Owner 山东汉德自动化控制设备有限公司
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