CN109742736A - High-voltage frequency converter guard method based on frequency converter itself energy consumption - Google Patents
High-voltage frequency converter guard method based on frequency converter itself energy consumption Download PDFInfo
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- CN109742736A CN109742736A CN201910056753.7A CN201910056753A CN109742736A CN 109742736 A CN109742736 A CN 109742736A CN 201910056753 A CN201910056753 A CN 201910056753A CN 109742736 A CN109742736 A CN 109742736A
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Abstract
The present invention relates to a kind of high-voltage frequency converter guard methods based on frequency converter itself energy consumption.This method passes through its own the energy consumption of real-time monitoring in high-voltage frequency converter operational process, and compared with energy consumption when under its normal operating conditions with load of the same race, to obtain the operation data of equipment from power level and judge the current operating status of equipment with the presence or absence of abnormal accordingly.Generate fault message rapidly if exception if it exists, equipment protecting equipment quick acting prevents the further expansion of failure.
Description
Technical field
The present invention relates to high-voltage frequency converter guard methods, more particularly to a kind of analysis frequency converter itself energy consumption that passes through to run number
According to high-voltage frequency converter guard method.
Background technique
When in use, the energy absorbed from power grid is mainly used for consumption and the frequency converter itself of load to high-voltage frequency converter
Energy consumption, wherein the energy consumption of itself generally only accounts for the 2%~5% of rated power, also just because of its accounting very little, so with
Preceding Design of Inverter producer generally less pays close attention to the energy consumption of frequency converter itself.However the energy of practical upconverter itself
Consumption includes that the running state information of many equipment may be implemented by the consumption power of real-time monitoring frequency converter from power
The operation data of level analysis equipment, it is relatively reliable, promptly find specific failure, thus act protective device rapidly,
Achieve the purpose that protect equipment while preventing failure further expansion.
When shorted-turn fault occurs for prior art high-voltage frequency converter phase-shifting transformer, monitoring input current can only be passed through
Variation or the variation of transformer temperature judge failure and give to protect.When equipment not running, input current itself will not
Very big, overcurrent protection is not easy to judge, the monitoring of transformer temperature is realized by temperature-sensitive point, when the point distance that short circuit occurs
Temperature-sensitive point farther out when be also not easy to detect.
Summary of the invention
For the above demand and to improving in place of the deficiencies in the prior art, the technical problem to be solved by the present invention is to mention
A kind of high-voltage frequency converter guard method by analyzing frequency converter itself energy consumption operation data is supplied.
In order to solve the above technical problems, the present invention monitors frequency converter input power and output power first, change can be calculated
The energy consumption of frequency device itself, compared with energy consumption range when being worked normally in normal data table, if abnormal energy consumption if it exists
Fault message is generated rapidly, and corresponding equipment protecting equipment is according to fault message quick acting.
Energy consumption range when further, according under frequency converter normal operating conditions with different loads, passes through calculating
It obtains and summarizes as normal data table with experimental data.
Further, when the energy consumption of real-time monitoring frequency converter itself is born under frequency converter normal operating conditions with of the same race
Energy consumption when load compares, and from the operation data of power level analysis equipment, judges that equipment whether there is abnormal energy consumption.
Further, if fault message quick acting cuts off converter power supply in time or barrier frequency converter is defeated
Out.
Still further, being the number according to the abnormal energy consumption of frequency converter itself from the operation data of power level analysis equipment
Value ratio judges specific device fault information.
For the present invention is compared to routine monitoring method, from completely new, macroscopical angle, by being run in frequency converter
Its own energy consumption of real-time monitoring in the process can monitor frequency converter operating status, effectively detection from power level for example
The generation of turn-to-turn short circuit etc failure is relatively reliable, rapid.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
Fig. 1 is that the present invention is based on the flow diagrams of the high-voltage frequency converter guard method of frequency converter itself energy consumption.
Fig. 2 is the electrical connection diagram of frequency converter guard method shown in Fig. 1.
Specific embodiment
Fig. 1 shows the flow diagram of high-voltage frequency converter guard method of the present invention.Input power can be obtained with output power calculating
Frequency converter itself energy consumption, compared with energy consumption range when being worked normally in normal data table, the equipment protection if exception if it exists
Device acts rapidly.It is to implement with voltage class 10kV rated output power 800kVA high-voltage frequency converter two kinds of different loads of band
Example: 1) normal operating conditions under when 100% rated current, frequency converter input power 951kVA, output power 905kVA；Frequency converter
Itself energy consumption 46kVA, itself energy consumption 37kVA when 80% rated current；2) under normal operating conditions when 100% rated current, frequency conversion
Device input power 920kVA, output power 878kVA, frequency converter itself energy consumption 42kVA, itself energy consumption when 80% rated current
30kVA.Mass data summarizes to be stored in inside frequency converter as normal data table, by by frequency converter itself energy consumption and criterion numeral
It compares according to table, judges equipment with the presence or absence of abnormal.
Fig. 2 shows high voltage bus to access frequency converter through circuit breaker Q F, contactor KM1, disconnecting switch QS1, then through being isolated
Switch QS2, contactor KM2 connection load M.Monitoring frequency converter input power is responsible in the internal power monitoring point 1 of frequency converter, internal
Power monitoring point 2 is responsible for monitoring power converter output.
It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, may be used also
To make several modifications and improvements, these also should be regarded as belonging to the scope of protection of the present invention.
Claims (5)
1. a kind of high-voltage frequency converter guard method based on frequency converter itself energy consumption, it is characterised in that: this method monitors change first
Frequency device input power and output power can be calculated the energy consumption of frequency converter itself, when with working normally in normal data table
Energy consumption range compares, and generates fault message rapidly if abnormal energy consumption if it exists, corresponding equipment protecting equipment is according to event
Hinder information quick acting.
2. the high-voltage frequency converter guard method according to claim 1 based on frequency converter itself energy consumption, it is characterised in that: described
Energy consumption range when under frequency converter normal operating conditions with different loads is to be obtained by calculating with experimental data, summarizes
As normal data table.
3. the high-voltage frequency converter guard method according to claim 1 based on frequency converter itself energy consumption, it is characterised in that: described
The energy consumption of real-time monitoring frequency converter itself, energy when by its value under frequency converter normal operating conditions with load of the same race disappear
Consumption compares, to judge that equipment whether there is abnormal energy consumption from the operation data of power level analysis equipment.
4. the high-voltage frequency converter guard method according to claim 1 based on frequency converter itself energy consumption, it is characterised in that: described
Cut off converter power supply or barrier frequency converter output in time according to fault message quick acting.
5. according to claim 1 or the 3 high-voltage frequency converter guard methods based on frequency converter itself energy consumption, it is characterised in that:
The operation data from power level analysis equipment is specific according to the number ratios judgement of the abnormal energy consumption of frequency converter itself
Device fault information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910056753.7A CN109742736A (en) | 2019-01-22 | 2019-01-22 | High-voltage frequency converter guard method based on frequency converter itself energy consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910056753.7A CN109742736A (en) | 2019-01-22 | 2019-01-22 | High-voltage frequency converter guard method based on frequency converter itself energy consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109742736A true CN109742736A (en) | 2019-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910056753.7A Pending CN109742736A (en) | 2019-01-22 | 2019-01-22 | High-voltage frequency converter guard method based on frequency converter itself energy consumption |
Country Status (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063974A (en) * | 2012-12-25 | 2013-04-24 | 广州供电局有限公司 | On-line monitoring method and device of distribution transformer turn-to-turn short circuit |
| CN204216802U (en) * | 2014-10-21 | 2015-03-18 | 南京奥博电气有限公司 | A kind of high voltage converter synchronous switching device |
| US20150346287A1 (en) * | 2014-05-27 | 2015-12-03 | North China Electric Power University | Method For Analyzing Operation State Of Substation By Combining Whole Grid Model With Local Grid Model |
| CN107132437A (en) * | 2017-05-09 | 2017-09-05 | 山东汇能电气有限公司 | The Operation Condition of Power Transformers method of real-time detected based on power attenuation |
-
2019
- 2019-01-22 CN CN201910056753.7A patent/CN109742736A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063974A (en) * | 2012-12-25 | 2013-04-24 | 广州供电局有限公司 | On-line monitoring method and device of distribution transformer turn-to-turn short circuit |
| US20150346287A1 (en) * | 2014-05-27 | 2015-12-03 | North China Electric Power University | Method For Analyzing Operation State Of Substation By Combining Whole Grid Model With Local Grid Model |
| CN204216802U (en) * | 2014-10-21 | 2015-03-18 | 南京奥博电气有限公司 | A kind of high voltage converter synchronous switching device |
| CN107132437A (en) * | 2017-05-09 | 2017-09-05 | 山东汇能电气有限公司 | The Operation Condition of Power Transformers method of real-time detected based on power attenuation |
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Application publication date: 20190510 |
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| WD01 | Invention patent application deemed withdrawn after publication |