Real time dynamic physics simulation device of flexible DC transmission system

Patent metadata

Field	Value
Publication number	US-9659114-B2
Application number	US-201114129056-A
Country	US
Kind code	B2
Filing date	Nov 29, 2011
Priority date	Jun 24, 2011
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

The present invention relates to a real time dynamic physics simulation device of flexible DC transmission system. The device includes simulated converter transformer, simulated AC field, simulated DC field, simulated converter reactor, simulated converter, and measurement and control cabinet chassis; the simulated AC field includes the vacuum switch I, the contactor I, resistors and the vacuum switch II connected orderly; the simulated DC field includes successively connected the vacuum switch contactor III and II; the simulated AC field is connected with said measurement and control cabinet chassis; Said converter transformer is set between said resistors and said vacuum switch II; Said simulated converter reactors and said simulated converter connected are set between the vacuum switch II and the vacuum switch III. The present invention can accurately simulate different voltage level flexible DC transmission system based on modular multilevel converter (MMC-HVDC), able to accurately understand the operation characteristics of MMC-HVDC and the dynamic responds to the instruction of the control system.

First claim

What is claimed is:

1. A real time dynamic physics simulation device of flexible DC transmission system is characterized that, it includes simulated converter transformer, simulated AC field, simulated DC field, simulated converter reactor, simulated converter, and measurement and control cabinet chassis;
said simulated AC field includes a vacuum switch I, a contactor I, resistors and a vacuum switch II, and they are serially connected; said simulated DC field includes serially connected the vacuum switch contactor III and II; said simulated AC field is connected with said measurement and control cabinet chassis;
said converter transformer is between said resistors and said vacuum switch II; and
said simulated converter reactors and said simulated converter are connected that is between the vacuum switch II and the vacuum switch III.

2. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, said measurement chassis includes an analog acquisition board, a signal conditioning board, a switching quantity input and output plate, a central processing board, a display and a recording equipment; said analog acquisition board gathers corresponding analog and switch quantities; and it outputs control signals through a switching quantity output interface to realize a circuit breaker/closing operation of all levels breakers.

3. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, said control cabinet comprises central processing boards, optical fiber communication board cards, and a power board; said central processing board comprises DSP, FPGA processor, level conversion circuit and communication channels; said control cabinet is used for connecting test system, and its current and voltage signals will be send to upper layer control system through said communication channels.

4. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, said converter is three-phase full bridge form, of which each phase has upper and lower two arms, each bridge arm consists of several scaled down MMC sub module boards in series with each other.

5. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, said converter transformer is a three-phase YD tapped double windings transformer.

6. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, said converter reactor is a three-phase low loss and high quality factor dry-type reactor; of which each phase has two reactors with same reactance value.

7. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, a set contactor III is connected with said resistors in parallel.

8. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, said converter transformer is non standard transmission ratio transformer, according to the simulated system, a capacitance ratio and a transformer ratio are selected, and the equation is:

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9. The real time dynamic physics simulation device of flexible DC transmission system according to claim 1 , is characterized that, said converter reactor is designed according to the actual engineering impedance ratio, is configured to limit the transient and fault current overshoot of simulated device, and its current and impedance simulation ratio are:

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Assignees

• He Zhiyuan
• Liu Dong
• Zhao Yan
• Yang Yuefeng
• Wang Renqiu
• State Grid Corp China
• China Electric Power Res Inst

Inventors

• He Zhiyuan
• Liu Dong
• Zhao Yan
• Yang Yuefeng
• Wang Renqiu

Classifications

• G01R31/085

  in power transmission or distribution lines, e.g. overhead · CPC title

• G01R31/088

  Aspects of digital computing · CPC title

• G01R31/086

  in power transmission or distribution networks, i.e. with interconnected conductors · CPC title

• G06F30/20

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title

• G01R31/2848 Primary

  using simulation · CPC title