CN-121983901-A - Mobile ice melting device for distribution network and ice melting method based on temperature and current

CN121983901ACN 121983901 ACN121983901 ACN 121983901ACN-121983901-A

Abstract

The invention relates to the technical field of ice melting devices, in particular to a movable ice melting device for a distribution network and an ice melting method based on temperature and current, which comprises at least three high-voltage cables based on temperature and current; the three high-voltage cables are respectively marked as a line A, a line B and a line C based on temperature and current, a strain clamp is arranged between the high-voltage cables based on temperature and current, the current is controlled to be conducted/disconnected through the strain clamp based on temperature and current, normal power supply is conducted, and the power supply is stopped when the strain clamp is disconnected.

Inventors

MA ZONGJUN
PENG SHIYANG
HUANG WEI
LI YI
YANG XIAO
YANG BO
LIU HAO
WU YU

Assignees

贵州电网有限责任公司

Dates

Publication Date: 20260505
Application Date: 20251215

Claims (10)

1. The movable ice melting device for the distribution network is characterized by comprising, At least three high voltage cables (1); The three high-voltage cables (1) are respectively marked as a line A, a line B and a line C, strain clamps (11) are arranged between each high-voltage cable (1), and the current is controlled to be conducted or disconnected through the strain clamps (11); Normal power supply is conducted; stopping power supply when the power is disconnected, and dividing each high-voltage cable (1) into a charged power supply line and an uncharged ice melting line so as to perform local ice melting operation; An ice-melting portion (2) comprising, The drainage unit (21) is used for introducing high-voltage alternating current from a power supply line and is used as an input power supply for ice melting; The high-voltage side of the transformation unit (22) is electrically connected with the drainage unit (21) and is used for converting the introduced high-voltage alternating current into low-voltage alternating current; a rectifying unit (23) with an ac input end electrically connected to the low-voltage side of the transforming unit (22) for rectifying the transformed low-voltage ac to dc; The output unit (24) is used for feeding the rectified direct current into the ice melting circuit, enabling the ice melting circuit to pass through continuous direct current, enabling the circuit to generate heat by utilizing the Joule heating effect, and realizing ice melting through heat conduction; The movable carrier (3) is used for bearing the ice melting part (2) and is movable, so that the ice melting part can be quickly deployed on site.
2. The mobile ice melting device for a distribution network according to claim 1, wherein the drainage unit (21) comprises at least three flexible wires A (211), and the three flexible wires A (211) are respectively matched with the three power supply lines one by one.
3. The mobile ice melting device for a distribution network according to claim 2, wherein the flexible lead A (211) is provided with a high-voltage switch (212); The dynamic end of the high-voltage switch (212) is electrically connected with one end of the flexible lead A (211), and the static end of the high-voltage switch is electrically connected with the input end of the high-voltage winding of the voltage transformation unit (22), so that the dual functions of power supply isolation and short-circuit protection are achieved.
4. A mobile ice melting device for a distribution network according to claim 3, wherein the transformation unit (22) is a 10/0.4kV power transformer with a capacity ranging from 100 kVA to 200kVA.
5. The portable ice-melting device for a distribution network according to claim 4, wherein said output unit (24) comprises at least two flexible wires B (241) and a shorting wire (242); The two flexible wires B (241) are respectively an anode wire and a cathode wire, the anode wire is connected with the starting end of the ice melting circuit on the circuit A, the cathode wire is independently connected with the starting end of the ice melting circuit on the circuit B, or the starting ends of the ice melting circuits of the circuit B and the circuit C are connected in parallel; The shorting bars (242) electrically connect the ends of the ice melting lines of the lines A and B or the ends of the ice melting lines of the lines A, B and C to form a passage.
6. The portable ice-melting device for a power distribution network according to claim 5, wherein a low-voltage switch (243) is provided on the flexible wire B (241).
7. The mobile ice-melting device for a distribution network according to claim 6, wherein the ice-melting part (2) further comprises, The detection unit (25) is used for collecting the operation parameters of the ice melting loop in real time and providing state feedback for subsequent control; The intelligent control unit (26) performs closed-loop regulation and control on the running states of the transformation unit (22) and the rectification unit (23) based on feedback data of the detection unit (25), and realizes self-adaptive regulation of the ice melting process.
8. The mobile ice melting device for the distribution network of claim 7, wherein the detection unit (25) is composed of a current transformer (251) and a temperature sensing element (252), and the current transformer (251) is connected in series between the output end of the rectification unit (23) and the ice melting circuit and is used for collecting working current signals of the ice melting circuit in real time; the temperature sensing element (252) is arranged at the head end position of the ice melting circuit and is used for collecting real-time temperature signals of the ice melting circuit.
9. The mobile ice melting device for the distribution network of claim 8, wherein the signal input end of the intelligent control unit (26) is electrically connected with the current transformer (251) and the temperature sensing element (252) respectively to obtain detection signals, and the signal output end is electrically connected with the control end of the rectifying unit (23); the intelligent control unit (26) is pre-stored with cable specification and ice melting corresponding current values, and can adaptively output control signals to the rectifying unit (23) through a PID (proportion integration differentiation) regulating algorithm according to the collected current signals, temperature signals and ice melting corresponding current values, so that closed-loop dynamic regulation and control of ice melting line current are realized.
10. The temperature and current-based ice melting method comprises the movable ice melting device for the distribution network according to any one of claims 1-9, and is characterized by comprising the following specific steps: the initial current rising stage is to gradually rise to the ice melting current; the ice melting stage is to keep the ice melting current running, monitor the temperature of the ice melting line in real time, and adjust the output to reduce the current when the temperature is higher than the set temperature TM; and (3) an ice melting ending stage, namely when ice melting is ended, regulating output to enable the current to drop to 0.

Description

Mobile ice melting device for distribution network and ice melting method based on temperature and current Technical Field The invention relates to the technical field of ice melting devices, in particular to a movable ice melting device for a distribution network and an ice melting method based on temperature and current. Background The icing of the mountain area distribution network line in winter is an important problem endangering the operation safety of the distribution network line, and due to the lack of ice melting equipment aiming at the mountain area distribution network line, a large number of people are sent out by each power supply unit in winter every year to carry out manual knocking deicing work along the line, so that the manual deicing work efficiency is low and the safety hidden trouble is high; because the high-voltage cables adopted by the mountain area distribution network have specification differences of wire sections, materials (such as aluminum cores and copper cores) and the like, the direct-current resistance values of the cables with different specifications are different, and parameters (such as current intensity and duration) required by the cables with different specifications to achieve an ideal ice melting effect are also different according to Joule's law, if the current value and temperature of an ice melting circuit cannot be monitored in real time in ice melting operation, the problems of ageing and damage of a wire insulating layer due to current overload or incomplete melting of ice coating due to insufficient current can occur, and meanwhile, the safety risks such as equipment burnout and short circuit of the circuit can be caused. Disclosure of Invention The invention is provided in view of the problems of the conventional movable ice melting device for the distribution network and the ice melting method based on temperature and current. The technical problems are solved by the following technical proposal that the invention provides a movable ice melting device for a distribution network, which comprises, At least three high voltage cables are based on temperature and current; The three high-voltage cables are respectively marked as a line A, a line B and a line C based on temperature and current, a strain clamp is arranged between each high-voltage cable based on temperature and current, and current is controlled to be conducted/disconnected through the strain clamp based on temperature and current; Normal power supply is conducted; stopping power supply when the power is disconnected, and dividing each high-voltage cable into a charged power supply line and an uncharged ice melting line based on temperature and current so as to perform local ice melting operation; The ice melting is based in part on temperature, current, including, The drainage unit is used for introducing high-voltage alternating current from a power supply line based on temperature and current and is used as an input power supply for ice melting; the high-voltage side of the transformation unit is electrically connected with the drainage unit based on temperature and current and is used for converting the introduced high-voltage alternating current into low-voltage alternating current; The rectification unit is based on temperature and current, and an alternating current input end of the rectification unit is electrically connected with a low-voltage side of the transformation unit based on temperature and current and is used for rectifying the transformed low-voltage alternating current into direct current; The output unit is used for feeding the direct current output by rectification into the ice melting circuit based on temperature and current, so that the ice melting circuit passes through continuous direct current, the circuit generates heat by utilizing the Joule heating effect, and the ice coating is melted by heat conduction; The movable carrier is based on temperature and current, is used for bearing the ice melting part and is based on temperature and current, and the movable carrier has mobility and is convenient to be rapidly deployed to the site. In a preferred embodiment of the movable ice melting device for the distribution network, the drainage unit comprises at least three flexible wires A based on temperature and current, and the three flexible wires A are respectively matched with three power supply lines one by one based on temperature and current. In a preferred embodiment of the mobile ice melting device for the distribution network, the flexible wire A is provided with a high-voltage switch based on temperature and current; the high-voltage switch is characterized in that the movable end of the high-voltage switch based on temperature and current is electrically connected with one end of the flexible lead A based on temperature and current, and the static end of the high-voltage switch is electrically connected with the input end of the high-voltage winding of the voltage