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A control method of a voltage gain adjusting device of a chain svg controller

A voltage gain and adjustment device technology, applied in the direction of circuit devices, irreversible DC power input to AC power output, electrical components, etc., can solve the problems of manual selection of gain that cannot keep up with the system, control instability, etc., and achieve structural Simple, responsive, and improved stability and reliability effects

Active Publication Date: 2017-01-25
STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Manual selection of gain cannot keep up with changes in system network conditions. When a large mutation occurs in the network, this manual switching process may cause control instability

Method used

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  • A control method of a voltage gain adjusting device of a chain svg controller
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  • A control method of a voltage gain adjusting device of a chain svg controller

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0026] The invention discloses a voltage gain adjustment device of an SVG controller, such as figure 1 As shown, it includes: an acquisition module, a filter, a phase corrector, a digital signal processor, a gain controller, and a PID controller are connected; where,

[0027] The acquisition module collects the bus voltage PT signal and current CT signal of SVG, and inputs the grid voltage signal into the filter, and the phase corrector receives the output signal of the filter for phase correction, and the signal after corrected phase is processed by a digital signal processor. The digital signal is processed, the gain controller receives the bus voltage signal and the reference voltage of the digital signal processor to determine the gain coefficient, and the PID controller device generates the SVG adjusted r...

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Abstract

The invention discloses a voltage gain adjusting device of a chain type SVG (static var generator) controller and a control method. A full-controlled converter device is adopted, the power grid voltage signal variation quantity is taken as the controlled quantity, a voltage gain adjusting signal is obtained by processing the power grid voltage signal variation quantity by an acquisition module, a filter, a phase corrector, a digital signal processor, a gain controller and a PID (proportion integration differentiation) controller, and an SVG outputs an instruction current. According to the voltage gain adjusting device, output control signals of the controller are adjusted according to a nonlinear model of an SVG electric power system, an inverter circuit is accurately controlled, higher gain coefficients are provided for large signals, low gain is provided for small signals, the response speed is high, the tracking precision is high, the stability and the reliability of a power grid can be greatly improved, and efficient operation of the whole power grid is guaranteed.

Description

technical field [0001] The invention relates to a device and a control method for accurately controlling a chained SVG inverter circuit. Background technique [0002] With the rapid development of power electronics technology, flexible AC transmission (FACTS) technology based on high-power power electronic devices is an effective means to enhance the controllability and flexibility of power transmission and distribution systems, and improve the stability and economy of operation. The static var compensation device has significant advantages over the traditional var compensation system in terms of operating range, controllability and response speed, and can effectively increase the transmission capacity of the power system and improve its static and transient stability. The static var generator SVG is an important static var compensation device, which plays an important role in the reactive power compensation of the power system, and the improvement of the voltage and voltage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02M7/48
CPCH02J3/1821H02M7/48Y02E40/10
Inventor 任力季金豹许允都宋柯任妍郭自勇孙贤大李航李海生
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY RIZHAOPOWER SUPPLY
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