Exploring the truth behind the hubbub: Why electricity tariffs have changed

Online Hot talk about some residents in Shanghai "January electricity tariffs doubled" People's Daily search for the truth behind the hubbub: Why the electricity bill has changed our correspondent Jiang Ice recently, about Shanghai, some residents "January electricity tariffs doubled" in the network is speculation, netizens said their own home in January electricity tariffs significantly increased.　　For the reasons for the increase in electricity tariffs, netizens questioned the main focus on two aspects: first, the new meter metering problems, and the second is the power supply departments deliberately to increase the voltage caused. Is there a general increase in electricity tariffs in Shanghai households in January? Is the Netizen's question reasonable?　　In response to these problems, the reporter conducted a survey interview.　　Focus One: Is there a problem with the meter? At the beginning of February, Internet users posted their own electricity bills online: The January electricity bill doubled by more than last December.　　As the power company had previously replaced some of the residents ' families with new electric meters, there was suspicion that there was a problem with the new meter count.　　The reporter learned from the Shanghai Bureau of Quality Supervision, in response to the public's query, February 15, the Shanghai Municipal Bureau of Quality Supervision organized the City Energy Meter strong inspection station technical experts, scattered in different communities, the first to the electricity meter questioned the 14 households of the electricity meter conducted on-site online verification, which has a new table also has an old table, the results are all qualified. February 17, the Shanghai Municipal Bureau of Quality Supervision issued a message that from February 9 to 16th, the City Power meter strong inspection station 750 "doubt" Power meter application for verification, sampling 222, qualified 216, the passing rate of 97.3%. Recently, the new table to apply for accreditation 170, sampling 56, the results of all qualified. In the 6 failed meters that have been found, there are 4 metering performance accuracy, its unqualified reason is not the measurement factor, all does not affect the electric energy billing----------------------------------------------　　There are also two meters with a deviation in metering performance, of which 1 watch clock error is 1 minutes slower than allowable value, may slightly affect time-sharing billing, but it is unlikely to cause a sharp increase in electricity tariffs; the other 1 meters are very poor metering, but they are less measurable and consumers may pay less for electricity.　　And netizens have suggested that "the power supply department can remotely control the household electricity meter, to walk how fast, go through the head can also walk back," in this, the East China University of Technology, physics professor Kang Kijun said, although it sounds magical, but technically "difficult to achieve", "not so simple." Professor Stern, director of electrical engineering at Shanghai Jiaotong University, said, in principle, users can be absolutely assured that the power sector does not have the means to speed up the meter. He believes that the meter since the birth of more than 100 years, there is no fundamental change in the accuracy of the count, the new electronic meter is certainly more sensitive than the old mechanical meters, the increase in electricity tariffs will not be much.　　The meter has been in a closed, live working state, there is no way to let it go fast.　　Focus Two: Has the voltage been elevated? For some netizens proposed that the power companies deliberately increase the voltage to achieve more electricity charges, a Shanghai electric power company, said the country's powerThere are quality requirements and the implementation of monitoring system, the National Electricity Regulatory Commission will be issued each quarter of the provincial power supply quality of the "two-rate" (power supply reliability, comprehensive voltage pass rate) indicators, these data on the government website have public information to check.　　Reporter February 24 from the National Electricity Regulatory Commission information public website-"China Electric Power Information public network" on See, in the fourth quarter of 2010, Shanghai Electric Power Company's urban power supply reliability rate of 99.983%, comprehensive voltage qualified rate of 99.814%. Professor Stern of the Department of Electrical Engineering, Shanghai Jiaotong University, said the power companies could not increase electricity tariffs by increasing the voltage, "not to mention, the high and low voltage, will not have a great impact on the electricity count, more likely to bring a geometric increase in electricity tariffs." Professor Yan explained that the size of the user's voltage is determined by the transformer in the distribution station.　　In the peak and trough of electricity consumption, the gap between electricity load will be very large, but the voltage difference is not much.　　Focus Three: Why does the electricity bill increase? The Shanghai Electric Power company explained that the unusually cold weather of December this year was the main cause of the big increase in electricity tariffs for households in January.　　Meteorological data show that Shanghai January this year, the lowest temperature in 34 years, the temperature of 0 ℃ the following days as many as 18 days, far more than last January (6 days) and last December (5 days) level, which will make residents home heating equipment, especially air-conditioning power consumption surge. This reporter to the air-conditioning industry to understand the air-conditioning power consumption situation. Chunlan Group Shanghai Marketing Management Center General manager Jin Jianwen told reporters, to a 2 air-conditioning for example, the rated power is generally 1500 watts, excluding the use of environmental factors, theoretically, it runs (refrigeration or heating) an hour to generate electricity consumption of 1.5 degrees. But now the air-conditioning has auxiliary heating device to ensure the heating effect of air-conditioning. The auxiliary heating device usually starts automatically when the outdoor temperature is below 0 ℃. The power of the auxiliary electric heating of air conditioner is different from the manufacturer, the auxiliary electric heating power of a 2 air conditioner is generally 1600 watts, the high can reach 2000 watts.　　In other words, when the outdoor temperature is below 0 ℃, a 2 air conditioner will increase the electricity consumption from 1.5 degrees to 3 to 3.5 degrees per hour. Shanghai Electric Power Company also said that the increase in electricity tariffs, in addition to weather reasons, there are two other factors, one is the school winter vacation, some large and middle school students at home more time; second, the regular reading date coincides with the Spring Festival holiday, the power company postponed some of the residents of the meter reading time, so that should be counted into the February electricity consumption, in advance into the January.　　Statistics of Household Electricity Bill of 14 households in Shanghai how about the electricity situation of the 14 households that originally questioned the electricity meter? Shanghai Electric Power Company provides 14 households since December 2009 electricity situation. From the data provided, it is true that there has been a significant increase in electricity tariffs in January. Compared with the relevant data can be seen, many families in summer and winter electricity is significantly higher than other seasons, winter is usually higher than summer.　　The statistical tables select the month in which air conditioners may be used in the last year or so.