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Outlet water temperature control method and system for circulating water in converter valve water cooling system

A technology of outlet water temperature and control method, applied in temperature control, non-electric variable control, control/regulation system, etc., can solve the problems of lagging control effect, inability to achieve stable control of cooling water temperature, etc., and achieve stable outlet water temperature and ensure stability performance, increase the effect of power adjustment function

Active Publication Date: 2021-09-07
CHANGZHOU BORI ELECTRIC POWER AUTOMATION EQUIP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is that the heat exchange mode of traditional air coolers can control the water temperature by controlling the number and rotation speed of the fans. The operating state of the equipment in the system, there is a lag in the control effect, and it cannot meet the requirements of stably controlling the temperature of the cooling water

Method used

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  • Outlet water temperature control method and system for circulating water in converter valve water cooling system
  • Outlet water temperature control method and system for circulating water in converter valve water cooling system
  • Outlet water temperature control method and system for circulating water in converter valve water cooling system

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Embodiment 1

[0048] refer to Figure 1~6 , this embodiment provides a method for controlling the outlet temperature of the circulating water in the water cooling system of the diverter valve, wherein, such as figure 1 , the water cooling system of the diverter valve includes the first water pump, frequency converter, heater connected in series with the three-way mechanism, the water outlet of the three-way mechanism is connected in parallel with the hot side of the plate heat exchanger to form an internal circulation, and the first water pump provides the required water circulation. The power of the heater enters the three-way mechanism after passing through the heater, and the three-way mechanism can adjust the flow of outlet A and outlet B proportionally according to the control command. Circulating water enters the high temperature side of the plate heat exchanger after passing through outlet B, mixes with the circulating water passing through outlet A after cooling down, and finally en...

Embodiment 2

[0073] refer to Figure 7 , is the second embodiment of the present invention, this embodiment is based on the previous embodiment, and the difference from the previous embodiment is that the circulating water outlet temperature control system in the diverter valve water cooling system includes a storage module 101 and a calculation module 102 , an acquisition module 103 , a display unit 104 and an output module 105 .

[0074] Specifically, the storage module 101 is used to store one or more programs to implement the above control method and store the expected value T of the outlet water temperature ref , converter valve loss coefficient k v , cooling water specific heat capacity c w , the rated flow rate Q of the water cooling system is the heat transfer correction coefficient k of the heat exchanger b , water cooling system design temperature difference between inlet and outlet water ΔT, k f It is the frequency conversion correction coefficient, so as to realize the abov...

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Abstract

The invention discloses an outlet water temperature control method and system for circulating water in a converter valve water cooling system. The converter valve water cooling system comprises a first water pump, a frequency converter, a heater and a three-way mechanism which are connected in series, and a water outlet of the three-way mechanism is connected with a hot side of a plate heat exchanger in parallel to form internal circulation; a second water pump, the cold side of the plate heat exchanger and the cooling water source form external circulation; the system also comprises a power regulator and an electric heater. The power supply is connected to the input end of the power regulator, and the output end of the power regulator is connected with the electric heater to supply power to the heater; the three-way adjusting angle and the frequency of the frequency converter are converted through the power of the valve group, the rotating angle and the system flow of the three-way mechanism are corrected and controlled by combining the PID algorithm, the three-way valve angle is used for coarse adjustment slow control, the main pump rotating speed is used for fine adjustment fast control, and the control range is large by combining the two modes, so that the temperature requirements under various operation conditions are met; and the stability of water temperature is ensured by a closed-loop adjustment mode.

Description

technical field [0001] The invention relates to the field of temperature control, in particular to a method for controlling the outlet temperature of circulating water in a water cooling system of a diverter valve. Background technique [0002] The electric power industry currently has many electrical equipment composed of high-power power electronic semiconductor components, such as thyristor converter valves and IGBT converter valves, which are widely used in engineering fields such as direct current transmission. The thyristor element in the converter valve generates high heat during operation and needs to be cooled by circulating cooling water. The cooling water flows through the diverter valve, the temperature rises and the generated heat is taken out, and the heat is exchanged with the external system, so that the temperature of the cooling water drops to a reasonable range and then flows back to the diverter valve to form a closed internal circulation system of coolin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/20
CPCG05D23/20
Inventor 高原耿龙飞江楠施洋洋苏雷
Owner CHANGZHOU BORI ELECTRIC POWER AUTOMATION EQUIP