CN204287319U - A kind of real time bidirectional electric energy independent measure system - Google Patents
A kind of real time bidirectional electric energy independent measure system Download PDFInfo
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- CN204287319U CN204287319U CN201420563187.1U CN201420563187U CN204287319U CN 204287319 U CN204287319 U CN 204287319U CN 201420563187 U CN201420563187 U CN 201420563187U CN 204287319 U CN204287319 U CN 204287319U
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Abstract
The utility model discloses a kind of real time bidirectional electric energy independent measure system, comprise voltage measurement module, current measurement module, electric energy computation chip, bidirectional electric energy counter circuit, metering processor and communication module, electric energy computation chip is output power direction while output power pulse, bidirectional electric energy counter circuit can identify that power direction indicates and aligns backward power pulse and count respectively, metering processor obtains independently in real time and accumulates forward and reverse electric energy, and backward power timing directly being read electric energy computation chip output compares with the main website reference value received, meeting and alarm during unusual circumstance.The utility model can the accumulation of forward, reverse power and forward and reverse total electric energy in real time between independent measure user and electrical network, simultaneously can by the monitoring to backward power, note abnormalities, remind related personnel to carry out doubtful supervision of gaining national generation of electricity by new energy subsidy event by cheating in time.
Description
Technical field
The utility model belongs to Electric Energy Metering Technology field, specifically relates to a kind of real time bidirectional electric energy independent measure system.
Background technology
Regenerative resource distributed generation technology is one of achievements of technology innovation with application prospect most in intelligent power grid technology field in recent years, is considered to solve current energy crisis, the effective way of environment quagmire.The powering mode adopting regenerative resource distributed power generation to combine with traditional mains supply obtains general accreditation and popularization.It is pointed out that in the powering mode combined with mains supply at regenerative resource distributed power generation, the flowing of electric energy between electrical network and user is not unidirectional.User both by electrical network to its supplementary power, can may give electrical network feedback power again, and the electric energy of feedback can also obtain the generation of electricity by new energy subsidy of country.This just needs a kind of metering system and the method that can realize the real-time independent measure of bidirectional electric energy.
Traditional electric energy metered system only can realize electric energy flows to user one direction metering from electrical network, and in current published Intelligent electric-energy metering technical scheme, computation chip only adopts pulse to export usually, Electric energy accumulation only has a counter, the electric energy of accumulation can be forward, reverse or forward and reverse algebraic sum, cannot measure forward, reverse power independently.As domestic published patent of invention CN 102200544A proposes a kind of total electricity accumulation method realizing the intelligent electric meter of bidirectional measuring, the cumulative of forward and reverse total electricity under the various rate of cumulative sum of forward and reverse total electricity can be realized, but the independent measure of forward and reverse electric energy cannot be realized, during electricity consumption payment settlement on sale, also just cannot the electricity of user feedback online be settled accounts and be subsidized.The development of regenerative resource distributed generation technology and the practical needs promoted can not be met.For another example domestic published patent of invention CN 103364631A proposes a kind of high-voltage user photovoltaic power generation electric energy metered system and method thereof, it refer to used electric energy meter for bidirectional electric energy gauging table, but do not provide scheme of the invention and the embodiment of bidirectional electric energy gauging table, what these all obviously can not meet regenerative resource distributed generation technology further develops the needs promoted with practicality.
Summary of the invention
In view of above-mentioned prior art Problems existing, the purpose of this utility model is to provide between a kind of user being configured with distributed new power generating equipment and electrical network, can the accumulation of forward, reverse power and forward and reverse total electric energy in real time between independent measure user and electrical network, simultaneously can by the monitoring to backward power, note abnormalities, remind related personnel to carry out doubtful system of gaining the real time bidirectional electric energy independent measure of the supervision of national generation of electricity by new energy subsidy event by cheating in time.
The purpose of this utility model adopts following technical scheme to realize:
A kind of real time bidirectional electric energy independent measure system, is characterized in that, comprise voltage measurement module, current measurement module, electric energy computation chip, bidirectional electric energy counter circuit, electric energy metrical processor and communication module;
Line voltage is converted into low voltage signal by voltage transformer (VT) by described voltage measurement module, then through anti-aliasing low-pass filter, is supplied to the voltage channel of electric energy computation chip, in order to carry out power measurement;
Current conversion between electrical network and user is low voltage signal by current transformer and series connection sampling resistor by described current measurement module, then through anti-aliasing low-pass filter, is supplied to the current channel of electric energy computation chip, in order to carry out power measurement;
Described electric energy computation chip is bidirectional electric energy power measurement chip, while output electrical energy pulse, exports electric energy power direction zone bit;
Described bidirectional electric energy counter circuit by two independently forward and reverse power counter form, two independently the power direction zone bit that all exported by computation chip by logical circuit of forward and backward counter is enable;
Described electric energy metrical processor, the carry pulse reading electric energy counter exports, complete conversion and the accumulation of forward and reverse electric energy, when the forward and reverse electricity of the accurate real time measure of needs, directly read the current count numerical value of bidirectional electric energy counter, simultaneously to counter O reset, after electric energy converts, be added with a front Electric energy accumulation value respectively, obtain accurate forward and reverse electric energy, calculate simultaneously the algebraic sum of forward and reverse electric energy and absolute value and;
Described communication module is used for the electric energy information about power of electric energy metrical processor acquisition process being sent to main website and receives the instruction and backward power reference value that main website assigns.
Further, the cutoff frequency of described low-pass filter is less than or equal to the half of electric energy computation chip current channel AD sample frequency.
Further, in described electric energy computation chip, export 0-1 low and high level power direction zone bit, one of them represents the forward electric energy of electrical network to customer power supply, another one then for the reverse power that representative of consumer is fed back to electrical network, simultaneously real time measure and export survey the instantaneous value of power forward or backwards.
Further, when the power direction zone bit that electric energy computation chip exports represents forward power, forward electric energy counter works, the electrical energy pulse that counting electric energy computation chip exports; When the power direction zone bit that electric energy computation chip exports represents backward power, reverse power counter works, the electrical energy pulse that counting electric energy computation chip exports.
Further, at set intervals, the power direction zone bit that reading electric energy computation chip exports by electric energy metrical processor, when the output pulses that electric energy computation chip positive output is reverse, the backward power instantaneous value that reading electric energy computation chip measures by electric energy metrical processor, and this value is compared with the backward power reference value that the main website received is assigned, if it is greater than reference value, then send alarm by communication module to main website.
Further, described electric energy metrical processor reads the time interval of the carry pulse of electric energy counter is 5-60 second.
Further, described communication module receives the time interval of the backward power reference value that main website issues is 5-30 minute.
Further, the transport module of described communication module and passage adopt optical fiber, GPRS, power carrier, RS 485.
Compared with prior art, the beneficial effects of the utility model are:
The utility model can realize the independent measure of real time bidirectional electric energy between electrical network and user, in the intelligent grid application containing new forms of energy distributed power generation, while the electric energy of metering electrical network supply user, the electric energy that metering user feeds back to electrical network, solves prior art and can only measure the problem of electrical network to the electric energy total amount algebraic sum of the forward electric energy of user or reverse power or Direct/Reverse;
In the intelligent grid containing new forms of energy distributed power generation, the utility model is with single equipment completing user electricity consumption payment settlement simultaneously, and national generation of electricity by new energy online subsidy clearing, provide reliable, convenient, and the technical solution of the existing electric energy measuring equipment cost of investment of not obvious increase;
The utility model, while completing real time bidirectional electric energy independent measure, effectively can reduce or avoid the event utilizing improper means to gain national generation of electricity by new energy subsidy by cheating to occur.
Accompanying drawing explanation
Fig. 1 is the utility model application structure figure;
Fig. 2 is the utility model inner structure schematic diagram;
Fig. 3 is the schematic diagram of the utility model electric energy metrical counter circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is conducted further description:
As shown in Figure 1, the utility model provides a kind of real time bidirectional electric energy independent measure system, is connected between electrical network and user, and user side is not only configured with conventional power load, is also configured with distributed new Blast Furnace Top Gas Recovery Turbine Unit (TRT);
As shown in Figure 2, the utility model specifically comprises voltage measurement module 1, current measurement module 2, electric energy computation chip 3, bidirectional electric energy counter circuit 4, metering processor 5, communication module 6.Wherein,
The photovoltaic conversion of junction between electrical network and user is low voltage signal by the voltage transformer (VT) in it by voltage measurement module 1, voltage transformer secondary side output voltage peak-to-peak value should meet input restriction and the measuring accuracy needs of computation chip voltage channel, this signal is through anti-aliasing low-pass filter, be supplied to the voltage channel of electric energy computation chip, preferably, the cutoff frequency of low-pass filter should be less than or equal to the half of electric energy computation chip voltage channel AD sample frequency;
Current conversion between electrical network and user is low voltage signal by current transformer and series connection sampling resistor by current measurement module 2, the peak-to-peak value of this voltage signal should meet input restriction and the measuring accuracy needs of computation chip current channel, through anti-aliasing low-pass filter, be supplied to the current channel of electric energy computation chip, preferably, the cutoff frequency of low-pass filter should be less than or equal to the half of electric energy computation chip current channel AD sample frequency;
Employing can meet the electric energy computation chip 3 of following requirement: the forward between the real-time independent measure electrical network of electric current and voltage information can measured according to voltage, current measurement module and user and backward power; Adopt the output form of electricity output pulses, and provide the direction flag of exported electricity output pulses simultaneously, zone bit 1 high level represents the forward power of electrical network to customer power supply, and zone bit 0 low level represents the backward power of user to electrical network feedback power; The instantaneous numerical value of the power forward or backwards measured can be read in real time.Have the more computation chip that can simultaneously require above in the market, this example adopts the CS5463 type single phase bidirectional electric energy computation chip of CIRRUS LOGIC company;
According to meter constant choose reasonable time constant T that electric energy computation chip 3 exports, preferably, T is between 10ms to 10s, and this time constant T, the computation chip Maximum Power Output pulsed frequency time should be less than, the full required time of bidirectional electric energy counter counts.Per interval T, the current count numerical value reading a forward and reverse power counter respectively resets counter by metering processor, metering processor is according to the counter read, converse current the counted electric flux of bidirectional electric energy counter according to the meter constant of computation chip, carry out with the forward stored and reverse power respectively cumulative after upgrade storage.When forward and reverse electricity accurately settled accounts by needs, to directly read the current count numerical value of bidirectional electric energy counter, counter be reset simultaneously, after electric energy converts, be added to respectively in the forward and reverse electric energy stored, obtain accurate real-time forward and reverse electric energy.When electric energy is settled accounts, metering processor also calculates forward and reverse algebraic sum electric energy by according to the forward and reverse energy value storing accumulation, and forward and reverse absolute value and electric energy etc. also store respectively.
Obtain independently forward and reverse electric energy and measure the energy data that processor module can calculate some mixing later, forward electric energy as total be user total from electrical network power purchase electric energy, total reverse power is the sale of electricity electric energy of user distribution formula power supply generating to electrical network, and total forward electric energy deducts the electric energy that total reverse power just obtains user and Utilities Electric Co.'s needs clearing.
Bidirectional electric energy counter circuit 4 includes counter---forward electric energy counter and the reverse power counter that two independently have ena-bung function (be 1 enable).The power direction zone bit that electric energy computation chip exports directly receives the Enable Pin of forward electric energy counter, is received the Enable Pin of reverse power counter by not circuit.When zone bit is 1, forward electric energy counter counts the output pulses that computation chip exports, and is designated as forward electric energy; When zone bit is 0, reverse power counter counts the output pulses that computation chip exports, and is designated as reverse power.The mode that bidirectional electric energy counter all adopts " carry output ", the capacity of counter is generally little, the output pulses constant that can export in conjunction with computation chip, according to required electric energy metrical precision choose reasonable rolling counters forward limit value, whenever the Counter Value of counter reaches this limit value, the accumulation of electric energy in counter meaning forward or backwards has reached the minimum measurement unit that measuring accuracy requires, this hour counter will export high level by comparer, this level resets counter, thus form a pulse output, this pulse exports with the form of interrupting as metering processor is read.
The present embodiment is with FPGA specific implementation bidirectional measuring processor 5, as shown in Figure 3, two independently forward and reverse electric energy counter be written in FPGA, all have enable, Protection Counter Functions, computation chip provides the input pin that output pulses directly links FPGA, and the counting input end in inside with two counters is connected.The power direction zone bit that computation chip provides links another input pin of PFGA, is directly connected with the Enable Pin of forward electric energy counter in inside, is connected by the Enable Pin of logical "not" circuit with reverse power counter simultaneously.The counting of forward and reverse electric energy counter exports the output pin being all directly connected to FPGA, and each output terminal being connected to respective clear terminal and FPGA through a comparator circuit exports as respective electric energy metrical pulse simultaneously;
Metering processor 5 receives the output pulse of forward and reverse counter with the form of interrupting, carry out the accumulation of forward and reverse power respectively, and is deposited respectively by the forward and reverse electric flux after accumulation.When forward and reverse electricity accurately settled accounts by needs, to directly read the current count numerical value of bidirectional electric energy counter, counter be reset simultaneously, after electric energy converts, be added to respectively in the forward and reverse electric energy stored, obtain accurate real-time forward and reverse electric energy.When electric energy is settled accounts, metering processor also calculates forward and reverse algebraic sum electric energy by according to the forward and reverse energy value storing accumulation, and forward and reverse absolute value and electric energy etc. also store respectively;
Every 60 seconds, the power direction zone bit that reading computation chip exports by metering processor 5, when read zone bit is 0, during the output pulses that namely now computation chip positive output is reverse, the backward power instantaneous value that reading computation chip measures by metering processor, and this value is compared with the backward power warning reference value that the main website received is assigned, if it is greater than reference value, then send alarm by communication module to main website;
Communication module 6 is for being sent to main website by the electric energy information about power of metering processor acquisition process and receiving the instruction and backward power reference value that main website assigns.The customer reverse power alarm reference value that communication module 6 is assigned every acceptance in 5-30 minute main website, this warning reference value will be calculated by following methods: according to weather condition, ambient temperature situations, the distributed new installed capacity situation of user calculates the customer reverse value and power reference P1 of this period
, by the uploading data of history collection in the past, analyze the maximum reverse power P 2 of user
,
get its greater among P1 and P2, add with reference to nargin
, obtain the backward power warning reference value of this period user
, namely
.
The customer reverse performance number of reading and backward power limit reference compare by metering processor, when occurring that customer reverse performance number is greater than backward power limit reference, send warning by communication module, remind related personnel to gain national generation of electricity by new energy Subsidy Act by cheating supervise doubtful in time.
The communication that communication module can adopt optical fiber/GPRS/ power carrier/RS 485 transport module such as grade and passage to realize between native system and main website.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to the utility model claims.
By reference to the accompanying drawings exemplary description is carried out to the utility model patent above; the realization of obvious the utility model patent is not subject to the restrictions described above; as long as have employed the various improvement that method is conceived and technical scheme is carried out of the utility model patent; or the design of the utility model patent and technical scheme directly applied to other occasion, all in protection domain of the present utility model without to improve.
Claims (3)
1. a real time bidirectional electric energy independent measure system, is characterized in that, comprises voltage measurement module, current measurement module, electric energy computation chip, bidirectional electric energy counter circuit, metering processor and communication module;
Line voltage is converted into low voltage signal by voltage transformer (VT) by described voltage measurement module, then through anti-aliasing low-pass filter, is supplied to the voltage channel of electric energy computation chip, in order to carry out power measurement;
Current conversion between electrical network and user is low voltage signal by current transformer and series connection sampling resistor by described current measurement module, then through anti-aliasing low-pass filter, is supplied to the current channel of electric energy computation chip, in order to carry out power measurement;
Described electric energy computation chip is bidirectional electric energy power measurement chip, while output electrical energy pulse, exports electric energy power direction zone bit;
Described bidirectional electric energy counter circuit by two independently forward and reverse power counter form, two independently the power direction zone bit that all exported by computation chip by logical circuit of forward and backward counter is enable;
Described electric energy metrical processor, the carry pulse reading electric energy counter exports, complete conversion and the accumulation of forward and reverse electric energy, when the forward and reverse electricity of the accurate real time measure of needs, directly read the current count numerical value of bidirectional electric energy counter, simultaneously to counter O reset, after electric energy converts, be added with a front Electric energy accumulation value respectively, obtain accurate forward and reverse electric energy, calculate simultaneously the algebraic sum of forward and reverse electric energy and absolute value and;
Described communication module is used for the electric energy information about power of metering processor acquisition process to be sent to main website and receives the instruction and backward power reference value that main website assigns.
2. real time bidirectional electric energy independent measure system according to claim 1, is characterized in that, the cutoff frequency of described low-pass filter is less than or equal to the half of electric energy computation chip current channel AD sample frequency.
3. real time bidirectional electric energy independent measure system according to claim 1, is characterized in that, the transport module of described communication module and passage adopt optical fiber, GPRS, power carrier, RS 485.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237632A (en) * | 2014-09-28 | 2014-12-24 | 南方电网科学研究院有限责任公司 | Real-time bidirectional independent electric-energy metering system |
| CN112014634A (en) * | 2020-08-21 | 2020-12-01 | 国核电力规划设计研究院重庆有限公司 | Multi-loop bidirectional dynamic electric energy metering device and method |
| CN116593768A (en) * | 2023-04-27 | 2023-08-15 | 深圳市锐能微科技有限公司 | Electric energy metering method and device, electronic equipment and medium |
-
2014
- 2014-09-28 CN CN201420563187.1U patent/CN204287319U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237632A (en) * | 2014-09-28 | 2014-12-24 | 南方电网科学研究院有限责任公司 | Real-time bidirectional independent electric-energy metering system |
| CN112014634A (en) * | 2020-08-21 | 2020-12-01 | 国核电力规划设计研究院重庆有限公司 | Multi-loop bidirectional dynamic electric energy metering device and method |
| CN112014634B (en) * | 2020-08-21 | 2024-02-09 | 国核电力规划设计研究院重庆有限公司 | Multi-loop bidirectional dynamic electric energy metering device and method |
| CN116593768A (en) * | 2023-04-27 | 2023-08-15 | 深圳市锐能微科技有限公司 | Electric energy metering method and device, electronic equipment and medium |
| CN116593768B (en) * | 2023-04-27 | 2024-03-26 | 深圳市锐能微科技有限公司 | Electric energy metering method and device, electronic equipment and medium |
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