In recent years, along with imbalance between power supply and demand transforms, electric power turned to the buyer's market by the seller's market.Developing electricity market, raising power supply quality become the task of top priority of power department, take the direct-furnish mode, implementing " table one family " engineering is effective behave, but has proposed new problem also for the management of power supply department thereupon, is exactly that the difficult problem of electricity charge recovery is just obvious further originally.Reclaiming that first of the electricity charge close is to check meter, and all will pay a large amount of manpowers and outside the time in the past, also must user Lai Peihe, since all be the problem that makes the power supply department headache.Domestic in recent years popular a kind of paying clasp type electricity meter that gives though can solve the paying problem, several new problems occur accordingly: the one, and power department can not be grasped at any time to the user power utilization amount, comes blindness for power supply management generation; The 2nd, because power department can not be grasped ammeter ruuning situation stealing electricity phenomenon takes place easily, especially IC-card is if decrypted its consequence is more hardly imaginable; The 3rd, the problem that aspects such as quality, price exist has limited the use (see for details and be entitled as " give the paying ammeter and can enter common people house " literary composition " northwest electricity newspaper " on August 6th, 98 two editions) of this product.In addition then, for present China based on thermal power generation, transferring the lotus electricity consumption is manual work of a nuchal spine of power supply department all the time, the count by time sharing of Ti Chuing is the effective measures of dealing with problems already, promptly be to meet phase, the low phase user power utilization amount of meeting to formulate different electricity prices by the electric load height, encourage the user to meet many electricity consumptions of phase at height, hang down and meet few electricity consumption of phase, but power department can't be distinguished in the user power utilization amount height and meet phase electric weight and the low phase electric weight that meets, and makes the count by time sharing way that proposes already also can only " be deeply aware of one's own helplessness when faced with a great task ".This invention makes the count by time sharing way become a reality when a difficult problem is checked meter in solution.
This system is made of the power consumer power consumption remote automatic meter reading system of a honeycomb fashion computing machine, modulator-demodular unit, client server, SZ series digit electric energy meter etc.Power consumer is divided into some service areas by supply transformer, each service area is installed a client server, all client servers couple together with couple of conductor and join with the modulator-demodular unit that is installed on power supply department, power consumer is installed digital electricity meter, and power supply department just can pass through functions (as shown in Figure 1) such as " power consumer data acquisition system (DAS) " software implementation user electric quantity data acquisition, statistics, printing on computers like this.
The principle of this system is " power consumer data acquisition system (DAS) " software on the operational computations machine WINDOWS platform, user SZ series digit electric energy table number that the root a tree name need be gathered and service district code name send instruction, this instruction through modulator-demodular unit modulation back by wired accepted demodulation by client server and discern after, by required client server that SZ series digit electric energy table number is encoded, the FSK command information that is modulated to 29KHZ sends through supply line, SZ series digit electric energy meter (performance is section as follows) receives that command information is after identification, SZ series digit electric energy meter by required user sends this table information about power this moment, this information is through client server, modulator-demodular unit is delivered to " the power consumer data acquisition system (DAS) " calculated on the meter WINDOWS platform, this system has continuously acquisition function automatically, follows according to different line qualities and per hour can gather user's electric quantity data 3000-5000.This system can need be provided with user's power supply segment function according to the user, and power supply department can situation such as be paid according to certain demand charge and cut off by this system at any time or closed certain user's power supply.If increase suitable equipment (as PTAD, CTAD etc.), also can carry out remote monitor to the circuit operation conditions by this system at each branch road of supply line.
SZ series digit electric energy meter is one of crux of this system, the up-to-date band full-electronic intelligence instrument that this instrument adopts extensive IC of CMOS and microprocessor chip etc. to constitute, this instrument compare with the common electrical kilsyth basalt except that have precision height, broad quantum, low in energy consumption, the life-span is long, volume is little, liquid crystal digital shows, this digital electricity meter has the data communication ability.This digital electricity meter is partly formed (as shown in Figure 2) by metering, liquid crystal display, reception amplification, modulation, demodulation, microprocessor, storer etc.Metering section is converted to umber of pulse by microprocessor processes rear drive liquid crystal display and simultaneously electric weight numerical value being write as storer by an application-specific integrated circuit with electric weight, but with guarantee in the power-off condition following table data long preservation and during for each energising reading into the microprocessor drive liquid crystal display.Receive the instruction that client server is sent when microprocessor and at first discern,, receive the instruction of cutting off the electricity supply when microprocessor and the time just drive the power cutoff switch if true time microprocessor driven sender partly sends electric weight digital signal this moment.This digital electricity meter can make an output port as required, can be used to drive an electromagnetic switch for the bigger user of power consumption and cuts off the electricity supply.This digital electricity meter can both be given accurate metering for the active power of positive and negative both direction and with same direction integrating, should show without any electromagnetic component in addition, even the electricity filching person use is shown device and can not be reached at the bottom of its stealing order, therefore has the real function of opposing electricity-stealing.
At present urban and urual areas of whole country have electricity meter-reading personnel more than 40 ten thousand (majority all is the temporary staff) approximately according to incompletely statistics, minimumly after these technology reduce meter reading personnel more than 30 ten thousand if all adopt, and only this item can be reduced expenses more than ten hundred million yuan to power supply department every year.Adopt the management level that can improve power supply department after this system greatly, effectively control stealing electricity phenomenon, help the implementation of " Every household has an ammeter " again, count by time sharing is become a reality, the user consciously adjusts to the low phase of meeting to power load under the driving of price interests, help the operation of power plant, the obtained benefit of whole electric system is big has just well imagined.This system is manufactured experimently by the applicant and reaches designing requirement, and the applicant agrees to make technology transfer, and collects the charges by relevant regulations, to realize the social value of this technology.