Low-voltage line voltage compensating device and compensating method thereof

A low-voltage line, voltage compensation technology, applied in the direction of AC network voltage adjustment, etc., can solve problems such as low voltage and instability, and achieve the effect of increasing voltage and simple structure

Inactive Publication Date: 2015-01-14
武汉珞珈天铭电气科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a low-voltage line voltage compensation device and its compensation method, which solves the problem of low voltage and instability of low-voltage lines caused by long-distance power transmission, which not only meets the economic requirements of power transmission, but also satisfies the User requirements for voltage quality

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  • Low-voltage line voltage compensating device and compensating method thereof
  • Low-voltage line voltage compensating device and compensating method thereof

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Embodiment Construction

[0024] The present invention will be further described below with reference to the drawings and embodiments.

[0025] figure 1 Description marked in: 1-low voltage line, 2-isolation transformer, 3-AC chopping module, 4-voltage measurement module, 5-voltage series module, 6-bypass switch, 7-load.

[0026] figure 2 Description marked in: S1-input circuit breaker, S2-bypass circuit breaker (ie figure 1 In 6), S3-output circuit breaker, C1-capacitor, L1-inductance.

[0027] Such as figure 1 with figure 2 As shown, the low-voltage line voltage compensation device of the embodiment of the present invention includes an isolation transformer 2, an AC chopping module 3, a voltage measurement module 4, a voltage series module 5, a bypass switch 6, an input circuit breaker S1 and an output circuit breaker S3; its connections The relationship is: the low-voltage line 1, the isolation transformer 2 and the AC chopper module 3 are electrically connected in sequence; the AC chopper module 3 is ...

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Abstract

The invention relates to a low-voltage line voltage compensating device and a compensating method thereof. The device comprises an isolating transformer, an alternating current chopper module, a voltage measuring module, a voltage series module and a by-pass switch; the connection relation comprises that a low-voltage line, the isolating transformer and the alternating current chopper module are electrically connected in turn; the alternating current chopper module is electrically connected with the voltage measuring module and the voltage series module respectively; the voltage series module and the by-pass switch are connected in parallel and then are electrically connected with a load respectively; and the voltage measuring module is connected with the low-voltage line. By taking electricity from the low-voltage line through the isolating transformer, the voltage value of the alternating current chopper module measured by the voltage measuring module generates a compensating voltage, and then the compensating voltage is sent to the voltage series module so as to ensure the voltage acquired by the load in a range of standard value. The method adopts power-electronics alternating current chopper technology and voltage series compensating modes to control and stabilize the voltage at the tail end of the low-voltage line in the standard range, and solves the problem of low and unstable voltage of the low-voltage line due to long-distance power transmission.

Description

Technical field [0001] The invention relates to a low-voltage line voltage compensation device and a compensation method thereof, which are suitable for use in a distribution network and solve the problem of low voltage after the low-voltage line is transmitted over a long distance. Background technique [0002] The "Rural Low-Voltage Power Technical Regulations" stipulates that the power supply radius of the low-voltage power grid is generally not more than 500 meters. However, in the rural distribution network, due to the scattered distribution of power users, it is inevitable that the load is small and the power supply radius exceeds 500 meters. Due to the small load, it is difficult to use the 10kV medium-voltage line to send power to the user from the perspective of economic benefits, so low-voltage line is selected for power supply; but the low-voltage line passes long-distance power transmission, the terminal voltage will increase with the change of user load The fluctuat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12
Inventor 阮江军乐健苏毅
Owner 武汉珞珈天铭电气科技有限公司
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