High pressure water resistance

Abstract

The invention discloses a high pressure water resistor which comprises a working water tank made from an insulating material. A phase potential polar plate and a zero level polar plate are concentrically arranged in the working water tank; a resistance value adjusting mechanism is arranged between the phase potential polar plate and the zero level polar plate; a water through window communicating the phase potential polar plate and the zero level polar plate is arranged on the resistance value adjusting mechanism; the resistance value adjusting mechanism adjusts the cross section, communicated by water, between the two polar plates by adjusting the size of the water through window; the cross section, communicated by water, between the two polar plates changes, so that the resistance between the polar plates changes. The resistance value adjusting mechanism is small in inertia and high in control sensitivity, effectively solves the problem of large fluctuation of a load power of a unit, is high in testing precision, good in safety performance and suitable for high pressure environments, can be applied to a direct current test, an alternating current test and a three-phase alternating current test, and is convenient and rapid, low in testing cost, reasonable in structure, convenient to operate and good in universality.

Description

technical field [0001] The invention belongs to the field of performance testing of high-voltage generator sets and high-voltage power supplies, and relates to a high-voltage water resistor used for load tests of generator sets. Background technique [0002] At present, there are usually two types of load devices used for load tests of generator sets: dry resistance and water resistance. Dry resistance is mainly made of contactor and resistance wire, and the number of resistance wires connected in parallel can be changed by closing the contactor, so as to obtain the specified resistance value; water resistance is mainly made of metal plate and water, by adjusting the metal plate and The distance or contact area between water to obtain the specified resistance value. [0003] The advantages of dry resistance are small power fluctuations and high control precision. The disadvantages are: the cost is expensive, which is more than three times that of water resistance; the power...

AI Technical Summary

Problems solved by technology

[0003] The advantages of dry resistance are small power fluctuations and high control precision. The disadvantages are: the cost is expensive, which is more than three times that of water resistance; the power is adjusted through contactors, and the resistance value of the resistance wire connected in series with each contactor is certain, so The power adjustment is stepped, and only a few designed power values ​​can be adjusted. The dry resistance designed for a generator set of a certain power is difficult to apply to other power generators, and the compatibility is poor; the number of cooling fans is large , serious noise pollution; large number of resistance wires, high comprehensive failure rate, and high maintenance cost; dry resistance designed for AC generators cannot be applied to DC generators

The disadvantages of this heat dissipation method are: in the process of mixing cooling water, the water temperature fluctuates greatly, resulting in large power fluctuations in the operation process; supporting facilities such as cooling towers, large heat exchangers, and large-area pools occupy a large area and are difficult to construct. The cost is high; the most serious thing is that the circulating cooling water circuit is directly connected with the phase plate. If it is applied to a high-voltage test of 6kV or 10kV, the heat dissipation equipment and pipelines in the circulating water circuit are at high potential, and there is a huge Security risks

[0006] Therefore, before the implementation of this patent, the existing water resistor power adjustment methods had technical problems such as poor adjustment sensitivity, large fluctuations in load power, and cooling system equipment occupying a large area, high cost, and low safety performance.

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