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35kv direct hanging svg system and its plc logic control method

A logic-controlled, direct-mounted technology, applied in flexible AC transmission systems, photovoltaic power generation, wind power generation, etc., can solve problems such as large footprint, elimination difficulties, and harmonic generation, and achieve the effect of reducing transmission loss

Active Publication Date: 2017-05-10
GUANGDONG MINGYANG LONGYUAN POWER ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, SVC has the following disadvantages: 1. The response time of SVC is 10-40ms, which is longer; 2. The compensation capacity is determined by the capacitor capacity and reactor capacity, which is narrow; 3. SVC itself is a harmonic source, which will generate Harmonics are very difficult to eliminate; 4. Since SVC uses high-voltage and large-capacity capacitors and reactors as energy storage components, it occupies a large area; 5. Due to the use of high-voltage and large-capacity capacitors and reactors, the power consumption is relatively high

Method used

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  • 35kv direct hanging svg system and its plc logic control method
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  • 35kv direct hanging svg system and its plc logic control method

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Embodiment Construction

[0039] The 35kV direct-mounted SVG control system adopts the configuration monitoring + PLC + controller mode. Among them, configuration monitoring is mainly responsible for issuing various control parameters, protection settings of the whole machine, and displaying operation status and faults; PLC is mainly responsible for the operation process of the whole machine; the main controller adopts DSP+FPGA architecture, and DSP is a step-down type from the previous generation. SVG’s TMS320F2812 is upgraded to TMS320F28335. TMS320F28335 has 32-bit floating-point calculation capabilities and high accuracy, which can easily calculate decimals. Fixed-point TMS320F2812 cannot directly calculate decimals and must be converted. It is mainly responsible for monitoring, PLC and FPGA. Data transfer between: FPGA is mainly responsible for 35kV direct-mounted SVG sampling, algorithm calculation, PWM pulse generation and protection, etc.

[0040] Such as figure 1 As shown, a 35kV direct-mounted S...

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Abstract

The invention discloses a 35 kV direct-hanging SVG system and a PLC logic control method thereof. The control system uses a method of configuration monitoring + PLC+ controller. The configuration monitoring is mainly responsible for issuing various control parameters, whole machine protection set values, and displaying operation states and faults. The PLC is mainly responsible for whole machine operation flow. The main controller uses DSP adding FPGA architecture. The 35 kV direct-hanging SVG does not need a step-down transformer, and is directly hung on a 35 kV power grid. The system can adapt to hundred-trillion-level fast dynamic compensation of a power grid, adjusts voltage of a long-distance transmission line, reduces power transmission loss, improves transmission capacity, and improves transient voltage maintenance level. The system can be widely used in wind power stations, photovoltaic power stations, etc.

Description

Technical field [0001] The invention relates to a large-capacity static reactive power compensator, in particular to a 35kV direct-mounted SVG system and its PLC logic control method. Background technique [0002] In the construction and operation of my country's power grid, a long-standing problem is insufficient reactive power compensation capacity and unreasonable equipment, especially the lack of adjustable reactive power capacity, and there are fewer reactive power regulating devices that respond quickly. [0003] In recent years, with the rapid economic growth, China's power grid has the following characteristics: generators are basically at full power, making dynamic reactive power support increasingly insufficient; with economic growth and high-tech development, constant power loads are increasing year by year; Air-conditioning, heating and other types of sudden load increase accounted for an increasing proportion, and the peak reached more than 40%. Conventional capacitor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCH02J3/18Y02E10/56Y02E10/76Y02E40/10
Inventor 吴福林陶原何小龙文接南杜超超
Owner GUANGDONG MINGYANG LONGYUAN POWER ELECTRONICS
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