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Pole-mounted rural power grid low-voltage comprehensive improving device and method

A low-voltage, agricultural network technology, applied in the direction of AC network voltage adjustment, reactive power compensation, etc., can solve the problems of large power supply radius, limited compensation capacity, large line loss, etc., to increase the voltage at both ends of the load and achieve stable voltage. Effect

Inactive Publication Date: 2016-11-23
武汉武新电气科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the low-voltage single-phase 220V system of the rural power grid, due to poor consideration and rapid development during construction, there are problems such as small power supply line paths and large power supply radius in some station areas, resulting in line loss for local residents during peak power loads Large, large line voltage drop, and the terminal voltage is lower than the minimum voltage available for electrical appliances, seriously affecting the production and life of rural residents, and also affecting the construction of new rural areas in our country
[0003] At the present stage, in view of the problem of low voltage in the rural power grid area, the large-scale replacement or increase of the transformer and cable diameter has a large investment scale, long cycle, and difficult operation implementation; the compensation capacity can be compensated by means of capacitance compensation and on-load voltage regulation. Limited, inconspicuous effect, hidden safety hazards and other disadvantages, it cannot quickly and effectively solve the low voltage problem commonly existing in rural power grids

Method used

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  • Pole-mounted rural power grid low-voltage comprehensive improving device and method
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  • Pole-mounted rural power grid low-voltage comprehensive improving device and method

Examples

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Effect test

Embodiment 1

[0032] figure 1 and figure 2 It shows a low-voltage comprehensive lifting device for rural power grids on a pole, including a sampling control module, a voltage compensation module, a reactive power compensation module and a protection system;

[0033] The voltage compensation module is used to boost the output voltage of the device;

[0034] The reactive power compensation module is used to compensate the inductive reactive power in the system according to the power factor of the system in real time, so as to improve the power factor;

[0035] The sampling control module is used to automatically collect voltage and current signals at the installation place, and control the voltage and power factor adjustment of the device;

[0036] The protection system is used to give the device reaction time and send out an alarm signal when a fault occurs.

[0037] As preferably, the sampling control module includes a sampling unit and a controller;

[0038] The sampling unit is used ...

Embodiment 2

[0053] Figure 4 It is an embodiment of the electrical schematic diagram of the device of the present invention, wherein the sampling circuit includes a first sampling circuit on the incoming line side of the device and a second sampling circuit on the outgoing line side, and the first sampling circuit collects input from the grid side The voltage level, the second sampling circuit is used to collect the output voltage level of the device, the first sampling circuit is first connected to the transformer primary side incoming line side N2 through the circuit breaker QF1, the indirect connection between the first sampling circuit and the second sampling circuit There is a primary side incoming line switch JC01, and the transformer secondary side outgoing line side N1 is provided with a first contactor JC1 that increases the voltage of the incoming line side N2 by 30%, and a second contactor JC2 that increases the voltage of the incoming line side N2 by 15%. The second sampling c...

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Abstract

The invention relates to a pole-mounted rural power grid low-voltage comprehensive improving device and method. The pole-mounted rural power grid low-voltage comprehensive improving device is connected in series on a rural power grid power transmission line, and comprises a sampling control module, a voltage compensation module, a reactive compensation module and a protection system. The voltage compensation module is used for improving the output voltage of the device; the reactive compensation module is used for compensating inductive reactive power in the system in real time according to the power factor of the system to improve power factor; the sampling control module is used for collecting voltage and current signals at the installation place automatically and controlling adjustment of voltage and power factor of the device; and the protection system is used for giving response time to the device and sending an alarm signal when fault occurs. The device is mounted on a telegraph pole in a transformer area; a controller obtains real-time voltage data from a sampling unit; the controller controls a contactor in each gear of a transformer to switch, thereby realizing voltage improvement, ensuring outlet voltage of the device is stabilized within 190 V-240 V, and realizing voltage stabilization; and a thyristor switched capacitor realizes reactive compensation.

Description

technical field [0001] The invention relates to the technical field of electric power and automation, and more specifically relates to a low-voltage comprehensive lifting device and method for rural power grids on poles. Background technique [0002] At present, in the low-voltage single-phase 220V system of the rural power grid, due to poor consideration and rapid development during construction, there are problems such as small power supply line paths and large power supply radius in some station areas, resulting in line loss for local residents during peak power loads Large, large line voltage drop, and the terminal voltage is lower than the minimum voltage available for electrical appliances, which seriously affects the production and life of rural residents, and also affects the construction of new rural areas in our country. [0003] At the present stage, in view of the problem of low voltage in the rural power grid area, the large-scale replacement or increase of the ...

Claims

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Application Information

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IPC IPC(8): H02J3/12H02J3/16
CPCH02J3/12H02J3/16Y02E40/30
Inventor 孙林波杜小刚方四安潘毅魏四海
Owner 武汉武新电气科技股份有限公司
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