Method for adaptively adjusting SVG rated current along with operating temperature

A technology of self-adaptive adjustment and operating temperature, applied in the direction of reactive power adjustment/elimination/compensation, electrical components, circuit devices, etc., it can solve the problems that SVG cannot quickly and dynamically compensate for operation, components are damaged, and enter the protection state. Avoid the effect of being easily damaged or entering a protected state

Pending Publication Date: 2020-12-29
BEIHAI SHENLAN SCI & TECH DEV
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Problems solved by technology

[0003] In the actual operation of SVG, the overall temperature of the device will be too high. The main reasons for this phenomenon are: poor contact of IGBT, aging of silica gel, aging of fan, aging of IGBT, and high external temperature. As the main core components of SVG, IGBT The rated current index is selected according to the rated compensation capacity of the device. With the continuous change of the site load and the increase of the operating environment temperature of the device, the SVG will still output the compensation current according to the rated capacity, which will cause damage to the components or enter the protection state. As a result, the SVG cannot normally perform fast dynamic compensation operation. Therefore, it is necessary to limit the output current of the IGBT as the operating temperature rises, so as to ensure the output current of the power device and make the device work in a safe area.

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  • Method for adaptively adjusting SVG rated current along with operating temperature

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Embodiment Construction

[0011] Combine below figure 1 , the technical solution of the present invention is described in further detail.

[0012] A method for self-adaptive adjustment of SVG rated current with operating temperature, comprising the following steps:

[0013] (1) According to the SVG rated output current setting value I c1 And the maximum temperature T that is allowed to operate the rated output current setting value c1 , SVG main component IGBT maximum junction temperature T C2 , output current I at junction temperature of SVG c2 , it is calculated that the operating temperature range of SVG is T c1 ~T c2 The derating factor of

[0014] (2) Collect the current operating temperature T of SVG 0 , when T 0 ≤ T C1 When, the rated output current of SVG=I c1 ; when T C1 0 C2 When the continuous time exceeds a certain period of time, the rated output current of SVG=I c2 +δ(T c2 -T c1 ), when T 0 ≥T C1 When, the rated output current of SVG=I c2 .

[0015] (3) According to th...

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Abstract

The invention discloses a method for adaptively adjusting rated current of an SVG (Static Var Generator) along with operating temperature, belongs to the technical field of dynamic reactive power compensation, and effectively prevents components from being damaged or entering a protection state due to over-high operating environment temperature of a device by adaptively and dynamically increasingor decreasing the rated current outputted by an IGBT (Insulated Gate Bipolar Transistor) of the SVG according to the highest temperature detected during operation of the SVG, and a caused problem thatthe SVG cannot normally carry out rapid dynamic compensation operation is further prevented.

Description

Technical field: [0001] The invention belongs to the technical field of dynamic reactive power compensation, and in particular relates to a method for self-adaptive adjustment of SVG rated current along with operating temperature. Background technique: [0002] In recent years, with the development of economic construction, the nonlinear, impulsive and fluctuating loads connected to the distribution network are increasing day by day, and the reactive power transmission loss of the power grid, unbalanced three-phase load, line loss and voltage loss, and harmonic interference Power quality problems such as power grids are becoming more and more serious, seriously affecting the normal operation of the power system and user equipment. Therefore, in order to improve the power transmission quality of the power grid, it is necessary to install reactive power compensation equipment in the distribution network to adjust the power imbalance in the distribution network, reduce the line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/01
CPCH02J3/01H02J3/1842Y02E40/10Y02E40/40
Inventor 姚普粮龙光成黄镜彬劳承毅欧世文吴恒春
Owner BEIHAI SHENLAN SCI & TECH DEV
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