A zero-sequence current ice melting device and its control strategy, equipment and medium
A zero-sequence current and control strategy technology, applied in the field of electric power, can solve the problems of large amount of ice-melting engineering and poor ice-melting effect, and achieve the effects of improving operation mode, convenient movement, and improving stability and economy.
Active Publication Date: 2022-07-19
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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[0003] This application provides a zero-sequence current ice-melting device and its control strategy, equipment and medium, which are used to solve the technical problems of the prior art that the ice-melting engineering of 10kV distribution network lines is large and the ice-melting effect is poor
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[0047] In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0048] see figure 1, a zero-sequence current ice-melting device provided in the embodiment of the present application includes: a three-phase four-bridge-arm converter and a grounding device;
[0049] The three-phase four-leg converter includes: four-leg, filter capacitor, filter reactance, neutral filter reactance, first isolation...
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The present application discloses a zero-sequence current ice melting device and its control strategy, equipment and medium. The device includes: a three-phase four-arm converter and a grounding device; wherein the three-phase four-arm converter includes: a four-arm converter , filter capacitor, filter reactance, neutral line filter reactance, the first isolation switch, the first circuit breaker; the filter capacitor is connected in parallel with the DC side of the four-bridge arm; one end of the filter reactance of each phase is connected to the AC side of the four-bridge arm respectively. The first group of bridge arms, the second group of bridge arms, the third group of bridge arms, and the other ends are connected to the beginning of the line to be melted through the first circuit breaker and the first isolation switch in turn; one end of the neutral line filter reactance is connected to The other end of the fourth group of bridge arms in the AC side of the four bridge arms is grounded; one end of the grounding device is sequentially connected to the line to be melted through the second circuit breaker and the second isolation switch, and the other end is grounded. It solves the technical problems of large amount of ice-melting engineering and poor ice-melting effect for 10kV distribution network lines in the prior art.
Description
technical field [0001] The present application relates to the field of electric power technology, and in particular, to a zero-sequence current ice melting device and its control strategy, equipment and medium. Background technique [0002] Among the existing ice-melting technologies for transmission lines, thermal de-icing is the most efficient ice-melting method. Power outage thermal deicing is represented by DC ice melting, while non-power outage thermal deicing includes overload ice melting, phase shifting transformer ice melting, and split sub-conductor alternating ice melting. With the continuous improvement of the power supply reliability requirements for the distribution network (10kV level), non-power outage thermal deicing has more practical application significance, but the existing non-power outage thermal de-icing cannot be applied to the distribution network. The electrical line is the terminal of the distribution network, and the load is determined by the use...
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IPC IPC(8): H02G7/16H02M7/5387H02M1/088H02J3/18H02J3/12H02H9/02
CPCH02G7/16H02M7/53875H02M1/088H02J3/1842H02J3/12H02H9/02Y02E40/40
Inventor 卢智键蔡英逊何湛邦陈竞灿郭国伟龚杰黄新东黎趸磊黄婉晴唐高煜阙东瀚刘轶郑翔升吴柏涛李文仕周志豪
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID