Insulation design apparatus of high voltage direct current transmission system

Patent metadata

Field	Value
Publication number	US-10270250-B2
Application number	US-201514793420-A
Country	US
Kind code	B2
Filing date	Jul 7, 2015
Priority date	Nov 26, 2014
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

An insulation design apparatus performing the insulation design of a high voltage direct current (HVDC) transmission system is provided. The insulation design apparatus includes a first insulation model generation unit; a second insulation model generation unit; an insulation verification unit, wherein the second insulation model generation unit selects the positions of each facility, device and arrester of the HVDC transmission system through a system single line diagram to select a representative facility in the HVDC transmission system, divides the HVDC transmission system into the plurality of regions based on the selected representative facility, and generates an insulation model for each region.

First claim

What is claimed is:

1. A non-transitory computer-readable medium having instructions stored thereon for execution, by a processor of a high voltage direct current (HVDC) transmission system, to:
generate an insulation model for the entire HVDC transmission system by analyzing the entire HVDC transmission system;
divide the HVDC transmission system into a plurality of regions and perform modeling on each of the plurality of regions to generate a region-dependent insulation model for each of the plurality of regions; and
determine whether the region-dependent insulation model generated for each of the plurality of regions satisfies a required voltage condition,
re-generate the insulation model for specific regions of the plurality of regions determined to no longer satisfy the required voltage condition by modifying the insulation model based on a change in region-dependent impedance and the region-dependent insulation model without re-analyzing the insulation model of the entire HVDC transmission system,
wherein the non-transitory computer-readable medium includes further instructions stored thereon for execution by the processor to:
collect data for dividing the HVDC transmission system into the plurality of regions;
divide the HVDC transmission system into the plurality of regions based on the collected data; and
generate the region-dependent insulation model for each of the plurality of regions,

wherein the plurality of regions includes at least two of a transmission-side alternating current (AC) portion, a transmission-side transformation portion, a DC transmission portion, a reception-side transformation portion, a reception-side AC portion, a transmission-side transformer portion, a transmission-side AC/DC converter portion, a reception-side DC/AC converter portion, and a reception-side transformer portion.

2. The non-transitory computer-readable medium according to claim 1 , having further instructions stored thereon for execution by the processor to separately apply a stress voltage to each of the plurality of regions and calculate a region-dependent insulation distance based on the applied stress voltage.

3. The non-transitory computer-readable medium according to claim 2 , having further instructions stored thereon for execution by the processor to:
generate the region-dependent model for each of the plurality of regions based on a maximum operation voltage; and
determine a change in insulation distance for each of the plurality of regions based on an environmental factor and modifying the corresponding generated insulation model according to the determined change.

4. The non-transitory computer-readable medium according to claim 1 , having further instructions stored thereon for execution by the processor to:
model the HVDC transmission system based on over-voltage and rated voltage of the HVDC transmission system and generating an insulation base model of the HVDC transmission
perform an insulation calculation on the generated insulation base model and determine an insulation voltage for performing a function of the generated insulation base model;
modify the generated insulation base model based on the determined insulation voltage and generate the insulation model for the entire HVDC transmission system;
calculate an insulation level satisfying a reference voltage of the generated insulation model; and
calculate the over-voltage and rated voltage of the HVDC transmission system.

5. The non-transitory computer-readable medium according to claim 4 , having further instructions stored thereon for execution by the processor to further modify the generated insulation base model based on an insulation voltage and a difference between an actual operating state of the HVDC transmission system and a state of the generated insulation base model to generate the insulation model.

6. The non-transitory computer-readable medium according to claim 5 , wherein the difference between the actual operating state and the state of the generated insulation base model system comprises at least a difference in an environmental factor, a difference in test of components, a deviation in product characteristic, a difference in installation state, a difference in operating life or a safety factor.

7. The non-transitory computer-readable medium according to claim 4 , having further instructions stored thereon for execution by the processor to:
calculate a set voltage of the generated insulation model; and
calculate the reference voltage from the calculated set voltage.

8. The non-transitory computer-readable medium according to claim 7 , having further instructions stored thereon for execution by the processor to calculate the reference voltage based on the set voltage and at least a test state, a test transformation factor or a voltage range.

9. The non-transitory computer-readable medium according to claim 4 , wherein the calculated insulation level comprises voltage values and distance values of one or more positions on the HVDC transmission system.

10. The non-transitory computer-readable medium according to claim 4 , wherein performing calculation comprises calculating based on at least an insulation characteristic of the generated insulation base model a function of the generated insulation base model, a statistical distribution of data on the generated insulation base model, an inaccuracy of input data of the generated insulation base model or a factor affecting a combination of components of the generated insulation base model.

Assignees

• Lsis Co Ltd

Inventors

• Choi Ho Seok
• Choi Yong Kil

Classifications

• H02J2103/30

  Simulating, planning, modelling, reliability check or computer assisted design [CAD] of electric power networks · CPC title

• H02M5/4505

  having a rectifier with controlled elements · CPC title

• Y02E60/60

  Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD] · CPC title

• H02M7/7575

  for high voltage direct transmission link · CPC title

• H02M7/19

  arranged for operation in series, e.g. for voltage multiplication · CPC title