High-voltage line power-taking CT multi-path parallel power-taking device

Abstract

The utility model relates to the technical field of CT power taking equipment, in particular to a high-voltage line power taking CT multipath parallel power taking device, which comprises a multi-circuit parallel energy taking mutual inductor and an energy taking power supply module, and is characterized in that the multi-circuit parallel energy taking mutual inductor comprises at least two energy taking mutual inductors and is used for obtaining electric energy from a power transmission conductor; the energy-taking power supply module carries out rectification filtering processing on each energy-taking mutual inductor through the discharge protection unit and the rectification unit and then realizes voltage-sharing control, the energy-taking power supply module is sequentially connected with the voltage-stabilizing control unit and the voltage-stabilizing output unit through the DC-DC circuit, and the DC-DC circuit is used for adjusting and constraining electric energy input into the energy-taking power supply module in real time, absorbing instant large current and outputting the electric energy. Stable voltage is output; according to the utility model, the defect that a single energy-taking mutual inductor cannot collect enough energy to maintain power supply of load equipment under low current is overcome, and the energy-taking mutual inductor becomes a better choice for processing monitoring equipment and maintaining the energy supply problem of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of CT power taking equipment, in particular to a multi-channel parallel power taking device for CT power taking from a high-voltage line. Background Art

[0002] With the vigorous construction of smart grids, real-time monitoring of the operating status of high-voltage transmission lines has received increasing attention. Monitoring equipment for high-voltage transmission lines usually works in ultra-high potential and strong magnetic environments, is directly exposed in the wild, and has long lines and a wide distribution range. The power supply of these monitoring equipment and related maintenance and control equipment has always been a more difficult problem. Conventionally, photovoltaic power generation, fiber laser power supply and a single CT power supply device are used. However, the solar energy of photovoltaic power generation needs maintenance and replacement after working for a period of time, and power outages are required during replacement; the optical fiber and photoelectric converter of fiber laser power supply are prone to aging, which can easily affect the power supply quality; a single CT power supply device is prone to not collecting enough energy at low current to maintain the power supply of the load equipment. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a multi-channel parallel power supply device for high-voltage line power supply CT to solve the above-mentioned technical problems.

[0004] A multi-circuit parallel power supply device for high-voltage line power supply CT, including a multi-circuit parallel power supply transformer and an energy supply power supply module, wherein the multi-circuit parallel power supply transformer includes at least two energy supply transformers, which are used to obtain electric energy from the transmission line and input the electric energy into the energy supply power supply module through the multi-circuit CT;

[0005] The energy-taking power supply module implements voltage-sharing control after rectifying and filtering each energy-taking transformer through a discharge protection unit and a rectifier unit, and then sequentially connects the voltage-stabilizing control unit and the voltage-stabilizing output unit through a DC-DC circuit. The DC-DC circuit is used to adjust and constrain the electric energy input to the energy-taking power supply module in real time, absorb instantaneous large current, and output a stable voltage.

[0006] Furthermore, the DC-DC circuit is connected to the energy storage battery through a charging control unit, and the energy storage battery is connected to the voltage stabilization output unit through a voltage conversion unit.

[0007] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects of the utility model include:

[0008] The multi-circuit parallel energy transformer can provide stable power output within the normal current range of the transmission line, overcoming the deficiency that a single energy transformer cannot collect enough energy to maintain the power supply of the load equipment under low current, and becomes a better choice for solving the power supply problem of monitoring equipment and maintenance equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the multi-circuit parallel energy-taking transformer of the utility model;

[0010] Figure 2 It is a flow chart of the utility model;

[0011] Figure numerals: 1-energy extraction transformer, 2-transmission wire, 3-energy extraction power supply module. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, other implementation methods or equivalent replacements obtained by those skilled in the art without creative work are all within the scope of protection of the utility model.

[0013] like Figure 1-2 As shown, a multi-circuit parallel power-taking device for high-voltage line power-taking CT includes a multi-circuit parallel energy-taking transformer and an energy-taking power supply module. The multi-circuit parallel energy-taking transformer includes at least two energy-taking transformers 1, which are used to obtain electric energy from a transmission line 2, and the electric energy is input into an energy-taking power supply module 3 by a multi-circuit CT;

[0014] The energy-taking power supply module 3 realizes voltage-equalizing control after rectifying and filtering each energy-taking transformer 1 through the discharge protection unit and the rectifier unit, and then connects the voltage-stabilizing control unit and the voltage-stabilizing output unit in sequence through the DC-DC circuit. The DC-DC circuit is used for power-taking regulation and maintenance, which can adjust and constrain the electric energy input to the energy-taking power supply module 3 in real time, absorb instantaneous large currents caused by special circumstances such as lightning strikes, and effectively prevent damage to the energy-taking power supply module due to closing gates, short-circuit faults, and lightning strikes. It can defend against short-term current shocks of up to 50KA and 4s, which is safe and reliable, and ensures that the energy-taking power supply module 3 can still output a stable voltage when the current in the transmission conductor 2 is unstable.

[0015] Among them, the DC-DC circuit is connected to the energy storage battery through the charging control unit, and the energy storage battery is connected to the voltage stabilizing output unit through the voltage conversion unit. The energy storage battery can seamlessly output a large instantaneous current to ensure the smooth startup of the equipment, and then convert it to power the voltage stabilizing circuit after startup; when the grid current is very small or even disconnected, the energy storage battery can power subsequent power equipment for a longer period of time through the conversion circuit.

[0016] Table 1 shows the starting current of the power taking device with a single energy taking transformer under different loads. The specification model of the energy taking transformer 1 is: HMGQDCT45, the quantity is 1, and the model of the energy taking power supply module 3 is: HM020W-12V.

[0017] Table 1: Starting current of a power take-off device with a single energy take-off transformer under different loads

[0018]

[0019] Table 2 shows the starting current of the power taking device with parallel energy taking transformers under different loads. The specification model of the energy taking transformer 1 is: HMGQDCT45, the quantity is 2, and the model of the energy taking power supply module 3 is: HM020W-12V.

[0020] Table 2: Starting current of the power take-off device with parallel energy take-off transformer under different loads

[0021]

[0022] It can be seen from the test parameters in Table 1 and Table 2 that, under the same load, the starting current of the power taking device composed of two parallel energy taking transformers is smaller than the starting current of the power taking device composed of a single energy taking transformer.

[0023] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-channel parallel power supply device for high-voltage line power supply CT, characterized in that: It comprises a multi-circuit parallel energy-taking transformer and an energy-taking power supply module (3), wherein the multi-circuit parallel energy-taking transformer comprises at least two energy-taking transformers (1) for obtaining electric energy from a power transmission line (2), and the electric energy is input into the energy-taking power supply module (3) by multiple CTs; The energy-taking power supply module (3) implements voltage-sharing control after rectifying and filtering each energy-taking transformer through a discharge protection unit and a rectifying unit, and then sequentially connects the voltage-stabilizing control unit and the voltage-stabilizing output unit through a DC-DC circuit. The DC-DC circuit is used to regulate and constrain the electric energy input to the energy-taking power supply module (3) in real time, absorb instantaneous large current, and output a stable voltage.

2. The high-voltage line power supply CT multi-channel parallel power supply device according to claim 1, characterized in that: The DC-DC circuit is connected to the energy storage battery through a charging control unit, and the energy storage battery is connected to the voltage stabilization output unit through a voltage conversion unit.

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