SU868641A1 - Device for measuring asymmetry of voltage in three-phase network - Google Patents
Device for measuring asymmetry of voltage in three-phase network Download PDFInfo
- Publication number
- SU868641A1 SU868641A1 SU802875031A SU2875031A SU868641A1 SU 868641 A1 SU868641 A1 SU 868641A1 SU 802875031 A SU802875031 A SU 802875031A SU 2875031 A SU2875031 A SU 2875031A SU 868641 A1 SU868641 A1 SU 868641A1
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- USSR - Soviet Union
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- voltage
- phase network
- measuring asymmetry
- phase
- measuring
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Description
1one
Изобретение относитс к электротехнике и может быть использовано дл непрерывного контрол качества напр жени в трехфазных сет х трехпроводной линии, например в электросети, где работают асинхронные двигатели.The invention relates to electrical engineering and can be used to continuously monitor the quality of voltage in a three-phase network of a three-wire line, for example, in an electrical network where asynchronous motors operate.
Известно устройство измерени несимметрии напр жени , в состав которого вход т активно-емкостной фильтр напр жени обратной последовательности , выпр митель и микроамперметр A device for measuring voltage unbalance, which includes an active-capacitance negative-sequence voltage filter, rectifier and microammeter, is known.
Устройство не отвечает требовани м как по объему и полноте получаемой информации, так и по точности измерений , а при наличии в электросети высших гармоник оказываетс неработоспособным .The device does not meet the requirements both in terms of the volume and completeness of the information received, and in terms of the accuracy of the measurements, and if there are higher harmonics in the power grid, it is inoperable.
Наиболее близким к предлагаемому по технической сущности вл етс устройство измерени несимметрии напр жений в трехфазных сет х, в котором совместно с активно-емкостным фильтром напр жений обратной последоч вательности, служащим в качестве измерительного датчика, включен частотно-избирательный усилитель, пропускающий на вход микроамперметра лишь основную частоту сети Г23.The closest to the proposed technical essence is a device for measuring voltage unbalance in three-phase networks, in which, together with an active-capacitive filter for the voltage of the reverse sequence, serving as a measuring sensor, a frequency-selective amplifier is passed, passing only main frequency of the G23 network.
Однако данное устройство измер ет лишь модуль напр жени обратной последовательности без сопоставлени его с величиной модул пр мой последовательности и не измер ет сдвиг фазы напр жени обратной пс/следова10 тельности по отношению к фазе напр жени пр мой последовательности, имеет низкие метрологические показатели, точность и быстродействие.However, this device measures only the negative sequence voltage modulus without comparing it with the magnitude of the direct sequence modulus and does not measure the phase shift of the reverse ps / sequence voltage relative to the direct sequence voltage phase, has low metrology, accuracy and speed.
Целью изобретени вл етс расши15 рение функциональных возможностей и повышение точности.The aim of the invention is to enhance the functionality and increase accuracy.
Поставленна цель достигаетс тем, что в устройство измерени несимметрии напр жени в трехфазных сет х, The goal is achieved by the fact that in a voltage unbalance measurement device in three-phase networks,
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802875031A SU868641A1 (en) | 1980-01-25 | 1980-01-25 | Device for measuring asymmetry of voltage in three-phase network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802875031A SU868641A1 (en) | 1980-01-25 | 1980-01-25 | Device for measuring asymmetry of voltage in three-phase network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU868641A1 true SU868641A1 (en) | 1981-09-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU802875031A SU868641A1 (en) | 1980-01-25 | 1980-01-25 | Device for measuring asymmetry of voltage in three-phase network |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU868641A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707881A (en) * | 2020-07-10 | 2020-09-25 | 陕西航空电气有限责任公司 | Three-phase alternating current power supply sequence identification method and device |
-
1980
- 1980-01-25 SU SU802875031A patent/SU868641A1/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707881A (en) * | 2020-07-10 | 2020-09-25 | 陕西航空电气有限责任公司 | Three-phase alternating current power supply sequence identification method and device |
| CN111707881B (en) * | 2020-07-10 | 2022-08-19 | 陕西航空电气有限责任公司 | Three-phase alternating current power supply sequence identification method and device |
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