Bypass seamless transfer circuit and method for active voltage drop clamping input control
A clamping and active technology, applied in the direction of circuit devices, electrical components, emergency power supply arrangements, etc., can solve problems such as power interruptions and power supply failures for users
Pending Publication Date: 2022-02-18
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO +2
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Problems solved by technology
[0004] The present invention aims to overcome the problems in the prior art that when the main circuit is switched to the bypass circuit, the user’s power interruption and power supply failure will occur, and provides a bypass seamless power supply circuit with active voltage drop clamp input control and method
Method used
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Embodiment
[0024] Embodiment: first connect the main bypass 2 to the upper port of the air switch, the lower port of the leakage protector through the power clip, and connect the auxiliary bypass 1 to the upper port and the lower port of the air switch, wherein the connection point of the upper port of the air switch is the main bypass The common wiring point of circuit 2 and auxiliary bypass 1; phase sequence detection, by detecting the voltage at the upper port of the air switch at the access point, the lower port of the air switch, and the lower port of the leakage protector respectively, after judging that the phase sequence is correct, the control buzzer If the phase sequence is wrong, the buzzer will continue, and the LCD screen on the panel will give a phase sequence error prompt. It is necessary to adjust the sequence of clips and test again until the phase sequence detection is passed; to the main side The thyristor SCR1 in the circuit 2 is triggered, and the first AC contactor i...
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The invention discloses a bypass seamless transfer circuit and method for active voltage drop clamping input control, and the circuit comprises a main bypass and an auxiliary bypass; the main bypass comprises a bypass leakage protector, a first AC contactor and a first anti-parallel fast power diode; one end of the bypass leakage protector is connected with a bypass ammeter, the other end of the bypass ammeter is connected with a silicon controlled rectifier SCR1, the silicon controlled rectifier SCR1 is connected with one end of a first anti-parallel fast power diode, a first alternating current contactor is connected in parallel with the two ends of the first anti-parallel fast power diode, and the auxiliary bypass comprises a silicon controlled rectifier SCR2, a second anti-parallel fast power diode and a second alternating current contactor; one end of the silicon controlled rectifier SCR2 is connected with one end of the second anti-parallel fast power diode, and the second alternating current contactor is connected with the second anti-parallel fast power diode in parallel. According to the invention, access of the direct-current seamless transfer bypass containing the leakage protector at a low-voltage power distribution network end is mainly solved, seamless transfer is carried out on a user through the bypass circuit, and the meter can be changed without power interruption in the meter changing process.
Description
technical field [0001] The invention relates to the auxiliary field of meter exchange in a low-voltage distribution network, in particular to a bypass seamless transfer circuit and method for active voltage drop clamp input control. Background technique [0002] When the main circuit is switched to the bypass circuit and the air switch, ammeter, or leakage protector in the main circuit is replaced, the current method used is to disconnect the main circuit and then transfer the rest of the circuit to the load. Short-term power failure will cause power failure loss for customers who require continuous power supply. The bypass main circuit controlled by the AC contactor is used for bypass transfer. This method is due to the long closing time of the AC contactor and the various The poor consistency of phase contact closing and disconnection will cause the leakage protector in the main circuit to operate, which may lead to damage to the leakage protector, and problems such as int...
Claims
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Patent Timeline
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CPCH02J9/068
Inventor 和巍陈凯郑涛朱跃施文煇王磊彭坤马振琦郑铭洲曹睿揭业炜盛斌权杨建国喻志平陆卫红牛中伟张楠郝栋梁张晓平吴勤春张力平张晓华
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO