Thermal equivalent test method for saturable reactor of direct current converter valve
A test method, reactor technology, applied in the field of efficiency test
Active Publication Date: 2014-02-19
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
At present, no such or similar test method has been used to conduct thermal equivalent tests of saturated reactors at home and abroad.
Method used
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[0027] The topological structure of the saturated reactor thermal equivalent test device provided by the present invention is as follows: figure 2 As shown, the test device includes a charger, a charging capacitor C 0 , resonant capacitor C, reactance L 1 , L 2 , Auxiliary valve V 1 , V 21 , V 22 , the test valve and other components in series with the saturated reactor; the connection between the saturated reactor and the cooling system is as follows: image 3 As shown, the temperature gauge, pressure gauge and flowmeter are used to monitor the state quantities such as temperature and pressure at the outlet of the saturated reactor.
[0028] according to figure 2 and image 3 Connect the electrical system and cooling system of the saturated reactor, start the cooling water system to supply water to the saturated reactor, and the water system reaches a stable operating state; start the electrical system, first use the high-voltage circuit to charge the test valve, unl...
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The invention belongs to the fields of power electronics and power systems, in particular relates to a thermal equivalent test method for a saturable reactor of a direct current converter valve, and provides the thermal equivalent test method and a thermal equivalent test device for the saturable reactor. High voltage and low current and low voltage and high current are alternately applied to the saturable reactor in one period, so that voltage and current borne by the saturable reactor in one period can be equivalent to those under the actual working condition, and both on-state loss and iron core loss reach the operation level; meanwhile, an independent water system is used to cool the saturable reactor, so that the cooling condition is the same as the condition of the saturable reactor in a converter valve system. Through electric strength provided by the test device, heat emission of the saturable reactor is equivalent to that under the actual working condition; a cooling system is arranged, so that heat dissipation of the saturable reactor is equivalent to that under the actual working condition; and the saturable reactor enters a thermally stable state after operating for a certain time, and whether the thermal characteristic of the saturable reactor meets the requirement or not can be known by monitoring the surface temperature of the saturable reactor.
Description
technical field [0001] The invention belongs to the fields of power electronics and power systems, and in particular relates to a thermal equivalent test method for a saturated reactor of a DC converter valve. Background technique [0002] The saturable reactor is an important component in the converter valve system, which is composed of a coil and an iron core. When the thyristor of the converter valve is turned on, the amplitude of the on-state current is small, but the rate of change of the current is large. The saturable reactor is used to limit the rate of change of the open current to avoid damage to the thyristor caused by too fast diffusion of carriers on the surface of the thyristor; when the thyristor After it is fully turned on, the amplitude of the on-state current is relatively large, the iron core of the saturable reactor is in a saturated state, and the external characteristics of the saturable reactor appear as a small inductance, thereby reducing the reactiv...
Claims
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IPC IPC(8): G01R31/00G01K7/22
Inventor 刘杰温家良魏晓光于海玉
Owner CHINA ELECTRIC POWER RES INST