Static reactive generating device
A technology of static var generation and power filtering, applied in harmonic reduction devices, reactive power adjustment/elimination/compensation, flexible AC transmission systems, etc., can solve the problem of continuous adjustment of reactive power, reactive power compensation, Implementation difficulties and other issues, to achieve the effect of simple and reliable control system, reduce harmonic loss, and improve stability and reliability
Inactive Publication Date: 2012-01-18
维尔利(苏州)能源科技有限公司
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Problems solved by technology
At the same time, the low power factor of the converter needs to compensate reactive power
In order to solve the problems of harmonic pollution and reactive power compensation in similar occasions, technicians have developed a variety of reactive power compensation devices, but either the cost is high or the implementation is difficult, and the real continuous adjustment of reactive power cannot be realized.
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[0013] refer to figure 1 As shown, the low-voltage static var generator of the present invention is used for the implementation example of reactive power compensation and harmonic filtering on the low-voltage secondary side of the rectifier transformer of the rolling mill transmission system. The device includes a set connected to the low-voltage secondary side of the transmission system rectifier transformer ZB A passive power filter device (FC) 1 for absorbing harmonics and reactive power compensation, and a set of IGBT control reactor (TCR) 2 connected to the low-voltage secondary side of the drive system rectifier transformer 2B for quickly absorbing reactive power , and a control system 3 . The input terminal of the high-voltage voltage and current signal of the control system 3 is connected to the voltage transformer PT1 and the current transformer CT1 of the high-voltage primary side of the rectifier transformer ZB, and the input terminal of the low-voltage voltage and ...
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The invention discloses a static reactive generating device. The static reactive generating device comprises a passive electric power filter device FC, an IGBT (Insulated Gate Bipolar Translator) Control Reactor (TCR) and a control system, and is characterized in that: the passive electric power filter device FC and the TCR together with a load are connected in parallel on a bus of a low-voltage secondary side of a rectifier transformer ZB; and furthermore, the passive electric power filter device FC and the TCR together with the load can also be connected in parallel on a direct power distribution low-voltage bus with load-like properties. The static reactive generating device has the advantages of quickness in response, wide operation range, high reliability, low power consumption and saved occupied area, can be used for compensating harmonic waves and reactive power at the same time, cannot lead to resonant short circuit, and is particularly suitable for use in an occasion with quicker reactive change of impact.
Description
technical field [0001] The invention particularly relates to a static var generator suitable for harmonic filtering and fast reactive power compensation in occasions where the supply voltage fluctuates greatly or the load contains high-order harmonics. Background technique [0002] In iron and steel metallurgy, petrochemical and other large industrial users and large substations, industrial loads connected to the AC power grid (6kV, 10kV, 35kV voltage levels, etc.) will generate 6k±1 or 12k±1 harmonics during work ( k is a positive integer), causing pollution to the power grid. The voltage fluctuation caused by the reactive impact will affect the normal operation of the electrical equipment. To eliminate the voltage fluctuation, the reactive power must be compensated. At the same time, the low power factor of the converter needs to compensate reactive power. In order to solve the problems of harmonic pollution and reactive power compensation in similar occasions, technicia...
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Login to View More IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/12Y02E40/10Y02E40/40
Inventor 文劲宇陈飞郑建勇高留民
Owner 维尔利(苏州)能源科技有限公司