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"Умные" электросчётчики могут почти в шесть раз завышать энергопотребление


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Posted

Ссылка на текст оригинала:

https://www.theregister.co.uk/2017/03/06/smart_meters_prove_dim/

 

Но лучше, хотя бы в виде краткого анонса, прочитать это:

 

Static energy meter errors caused by conducted electromagnetic interference

Static, or electronic, energy meters are replacing the conventional electromechanical meters. Consumers are sometimes complaining about higher energy readings and billing after the change to a static meter, but there is not a clear common or root cause at present. Electromagnetic interference has been observed between active infeed converters as used in photo-voltaic systems and static meters. Reducing the interference levels eliminated inaccurate reading in static meters. Several field investigations failed to identify a clear root cause of inaccurate readings of static energy meters. Experiments were performed in a controlled lab environment. Three-phase meters showed large deviations, even when supplied with an ideal sinusoidal voltage from a fourquadrant power amplifier. Large variations could be observed when non-linear, fast switching, loads were connected. A deviation of +276 % was measured with one static energy meter, +265% with a second and -46% with a third static energy meter. After dismantling it was revealed that the meters with the positive deviation used a Rogowski coil current sensor. The meter with a Hall effect-based current sensor gave the -46% deviation. The fourth meter, with a current transformer, resulted in -10% in one experiment and +8% in another experiment, where the deviations are with respect to a conventional electromechanical meter. Measurements were repeated with more meters and supplied from standard, low internal impedance, mains supply in the laboratory. Deviations of +475%, +566%, +569%, +581%, +582% and -31% and -32% were registered, with again the positive deviation for Rogowski coil current sensors and negative deviations for the Hall sensors.

http://ieeexplore.ieee.org/document/7866234/?reload=true

 

Писали эти же авторы и в 2016:

 

More often consumers are complaining about the energy bill after the conventional electromechanical meter has been replaced by an electronic, or static, energy meter. Active infeed converters for photo-voltaic systems are a known source for interference to static meters. To investigate the root cause experiments on static meters have been performed in a controlled lab environment. Three-phase meters showed large deviations of more than 250% and -46%. After dismantling it was revealed that the meters with the positive deviation used a Rogowski coil current sensor. The meter with a Hall effect-based current sensor gave the -46% deviation.

http://ieeexplore.ieee.org/document/7739298/

Posted

Static energy meter errors caused by conducted electromagnetic interference

Static, or electronic, energy meters are replacing the conventional electromechanical meters. Consumers are sometimes complaining about higher energy readings and billing after the change to a static meter, but there is not a clear common or root cause at present. Electromagnetic interference has been observed between active infeed converters as used in photo-voltaic systems and static meters.

 

Вместо того, чтобы считать энергию полученную солнечными батареями с крыши дома как отданную в электросеть общего пользования, счетчик считал её как потребленную домом из этой самой сети?

 

Three-phase meters showed large deviations of more than 250% and -46%. After dismantling it was revealed that the meters with the positive deviation used a Rogowski coil current sensor. The meter with a Hall effect-based current sensor gave the -46% deviation.

http://ieeexplore.ieee.org/document/7739298/

А еще Логично предположить что на основе этих датчиков не только счетчики электроэнергии строят....

Posted

Static energy meter errors caused by conducted electromagnetic interference

Static, or electronic, energy meters are replacing the conventional electromechanical meters. Consumers are sometimes complaining about higher energy readings and billing after the change to a static meter, but there is not a clear common or root cause at present. Electromagnetic interference has been observed between active infeed converters as used in photo-voltaic systems and static meters.

 

Вместо того, чтобы считать энергию полученную солнечными батареями с крыши дома как отданную в электросеть общего пользования, счетчик считал её как потребленную домом из этой самой сети?

 

А может завышал кол-во "отданных" киловатт по сравнению с реально выработанными?

 

Three-phase meters showed large deviations of more than 250% and -46%. After dismantling it was revealed that the meters with the positive deviation used a Rogowski coil current sensor. The meter with a Hall effect-based current sensor gave the -46% deviation.

http://ieeexplore.ieee.org/document/7739298/

А еще Логично предположить что на основе этих датчиков не только счетчики электроэнергии строят....

Ну конечно датчик "виноват" :) А разработчики этих счётчиков не при чём?

Posted

Static energy meter errors caused by conducted electromagnetic interference

Static, or electronic, energy meters are replacing the conventional electromechanical meters. Consumers are sometimes complaining about higher energy readings and billing after the change to a static meter, but there is not a clear common or root cause at present. Electromagnetic interference has been observed between active infeed converters as used in photo-voltaic systems and static meters.

 

Вместо того, чтобы считать энергию полученную солнечными батареями с крыши дома как отданную в электросеть общего пользования, счетчик считал её как потребленную домом из этой самой сети?

 

 

 

99% счетчиков электроэнергии - считают ее по "модулю"... Им по барабану направление электроэнергии - им важно сколько ее прошло.

Если есть желание сливать в сеть электроэнергию - нужно использовать двухнаправленный счетчик или дисковый счетчик без стопора.

Posted (edited)

 

99% счетчиков электроэнергии - считают ее по "модулю"... Им по барабану направление электроэнергии - им важно сколько ее прошло.

Если есть желание сливать в сеть электроэнергию - нужно использовать двухнаправленный счетчик или дисковый счетчик без стопора.

 

Проблема давно известна. (Поставщик не хочет покупать электричество обратно)

Решение тоже давно есть. Grid tie inverter with limiter. Прям вот так и забивайте на али.

За счётчиком стоит амперметр-токовые клещи, и умный девайс limiter просто не выдаёт электричества больше, чем потребляет дом.

 

Хрень выгодна, если вы живёте южнее Астрахани - Ростова на Дону, или какая-то местная климатическая аномалия, больше 200 безоблачных дней в году.

Edited by KT315

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