Full-split-phase-compensation compensation device based on 124888 coding
A compensation device and coding technology, applied in reactive power compensation, circuit devices, reactive power adjustment/elimination/compensation, etc., can solve problems such as increased line and transformer losses, system three-phase imbalance, and unfavorable compensation accuracy. To achieve the effect of improving the compensation accuracy
Pending Publication Date: 2019-04-26
ANHUI NANRUI JIYUAN POWER GRID TECH CO LTD +1
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Problems solved by technology
[0004] The traditional compensation scheme has only one encoding method, that is, the capacity of the single-loop capacitor is equal to the cycle switching, so the capacitive reactive power provided by the traditional reactive power compensation device is a limited number of several levels, which is not conducive to improving the compensation accuracy, and the power grid needs The value of the compensated capacitive reactive power is often continuous and not graded, and the three-phase imbalance of the system will also increase the loss of the line and transformer
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[0019] see figure 1 , which is a circuit structure diagram of a full sub-complement compensation device based on 124888 encoding proposed by the present invention;
[0020] Such as figure 1 As shown, a full sub-compensation compensation device based on 124888 encoding, including: a three-phase line acquisition device, six compensation circuits 1C-6C and a controller;
[0021] The three-phase line acquisition device is arranged on the three-phase line for detecting the voltage and current of each phase in the three-phase line; the six compensation circuits 1C-6C are arranged in parallel on the three-phase lines L1, L2, and L3. The six compensation loops 1C-6C are electrically connected to the output terminals of the controller respectively, and the output terminals of the three-phase line acquisition device are connected to the controller; the six compensation loops 1C-6C all adopt sub-compensation capacitor circuits, and the six compensation loops The 124888 encoding method ...
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The invention discloses a full-split-phase-compensation compensation device based on 124888 coding. The full-split-phase-compensation compensation device comprises a three-phase line collection device, six compensation loops and a controller; the three-phase line collection device is arranged on a three-phase line for detecting the voltage and current of each phase in the three-phase line; and thesix compensation loops are arranged in parallel on the three-phase line, the six compensation loops are separately and electrically connected with the output end of the controller, and the output endof the three-phase line collection device is connected with the controller. The six compensation loops adopt a split-phase-compensation capacitor loop, wherein the six compensation loops use a 124888coding mode to distribute the capacitance of the split-phase-compensation capacitor loop, and the controller combines seventeen domains to perform switching operation on the six compensation loops. The full-split-phase-compensation compensation device greatly improves the capacity control over the capacitor, realizes accurate and rapid full-split-phase compensation of the three phases of A, B andC, and is suitable for the design of three-phase unbalanced reactive power compensation products in a low-voltage power grid region.
Description
technical field [0001] The invention relates to the technical field of electric power system equipment, in particular to a 124888 code-based full sub-compensation compensation device, which is suitable for the design of three-phase unbalanced reactive power compensation products in low-voltage power grid areas. Background technique [0002] In the low-voltage power grid, with the improvement of residents' living standards and the popularization of household appliances, as well as the development of industry, a large number of nonlinear and impact loads are connected to the power grid, which will generate harmonics, voltage fluctuations and flicker during operation, resulting in grid voltage fluctuations. The waveform is distorted, the three-phase load is unbalanced, and the power factor of the power grid is mostly relatively low. [0003] With the rapid development of China's economy, the market demand for reactive power compensation devices is also growing rapidly. At pres...
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Login to View More IPC IPC(8): H02J3/18H02J3/16H02J3/26
CPCH02J3/16H02J3/1828H02J3/26Y02E40/30Y02E40/50
Inventor 奚振乾闫少春王成进谢红福吴海峰光魏娟潘兵余娟陆文文戴前婷苏群焦丙辰程前
Owner ANHUI NANRUI JIYUAN POWER GRID TECH CO LTD