CN102394487A - Protection unit of prepayment device - Google Patents
Protection unit of prepayment device Download PDFInfo
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- CN102394487A CN102394487A CN2011102912681A CN201110291268A CN102394487A CN 102394487 A CN102394487 A CN 102394487A CN 2011102912681 A CN2011102912681 A CN 2011102912681A CN 201110291268 A CN201110291268 A CN 201110291268A CN 102394487 A CN102394487 A CN 102394487A
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Abstract
The invention provides a protection unit of a prepayment device. The structure of the protection unit comprises a voltage transformer, a voltage collection module, a current transformer, a current collection module, a prepayment ammeter, a memory, a CPU (central processing unit), a switching power supply, a prepayment device vacuum switch and a signal drive circuit, wherein the voltage transformer is connected with the CPU through the voltage collection module; and the current transformer is connected with the CPU through the current collection module; and the prepayment ammeter, the memory, the switching power supply, the prepayment device vacuum switch and the signal drive circuit are respectively connected with the CPU. According to the invention, the integrated protection unit of the prepayment device is designed by using elements of the prepayment device, comprising the transformers and a circuit breaker and the like, and has the functions of short-circuit protection, overcurrent protection, zero sequence overcurrent protection, wireless communications and the like, so that the prepayment device has protection function. In addition, by using the protection unit of the prepayment device provided by the invention, while the investment of prepayment clients is reduced, the function of protecting the equipment of the clients can be realized, and the reliability of power supply is also improved at the same time.
Description
(1) technical field
The present invention relates to a kind of prepaid devices, specifically a kind of prepaid devices protected location.
(2) background technology
In order to adapt to management of power use requirements of one's work, power supply department is promoted user installation 10kV high-voltage prepayment metering device, and the prepayment metering device is suitable for installing on the outdoor post; With the high-pressure vacuum breaker is main body; The inner high pressure measurement instrument transformer that embeds, the side perforate is introduced the secondary control signal wire of instrument transformer secondary line and circuit breaker in the control cabinet of side; Side opening connects together through the control cabinet of waterproof, encapsulation process and side, and prepayment meter is placed in the control cabinet of side.When the user purchases electricity charge pre-paying kilowatt-hour meter node action when reaching set point in advance, the circuit breaker trip of prepaid devices cuts off user's power supply.
Prepaid devices is because the mounting distance customer substation is far away, and alarm signals such as electricity charge remaining sum is low are moved, purchased in advance in the overcurrent protection action of protected location and pre-paying kilowatt-hour meter, short-circuit protection action, zero-sequenceprotection, the forward purchasing electricity charge are that zero circuit breaker trip signal user can't in time know.
(3) summary of the invention
Technical assignment of the present invention is the deficiency to prior art, and a kind of high-pressure vacuum breaker that makes full use of is provided, when the subscriber equipment fault, and the prepaid devices protected location of cutting off the electricity supply rapidly.This protected location not only makes full use of the prepayment metering device, has also improved the reliability of supply line.
The technical solution adopted for the present invention to solve the technical problems is:
The prepaid devices protected location does not increase at the prepayment metering device under the situation of protection instrument transformer, solves the metering instrument transformer and is used to protect the loop.The magnetic saturation coefficient unshakable in one's determination of metering instrument transformer is also smaller; When the equipment short circuit; The instrument transformer magnetic saturation of metering level; Can only react above instrument transformer rated value 120% with interior overcurrent value, general short circuit current is all in rated current more than 5 times, so the metering instrument transformer just can not the linear response short-circuit current value.Have two characteristics one to be during through the analysis short circuit, electric current is big, and the 2nd,, voltage is low.Utilize linear overcurrent maximum of metering instrument transformer and low-voltage minimum value composite action to realize short-circuit protection function; At the outlet cable of prepaid devices zero sequence CT is installed and realizes that zero-sequence current detects, and realizes the zero sequence overcurrent protection function; The UPS uninterrupted power supply is installed for prepayment device electric power loop and is not only improved ring current stability, the voltage low switch problem that normally trips very when also solving the subscriber equipment fault.
Its structure comprises voltage transformer, voltage acquisition module, current transformer, current acquisition module, pre-paying kilowatt-hour meter, memory, CPU, Switching Power Supply, prepaid devices vacuum switch and signal drive circuit:
1) voltage transformer is connected with CPU through voltage acquisition module;
2) current transformer is connected with CPU through the current acquisition module;
3) pre-paying kilowatt-hour meter, memory, Switching Power Supply, prepaid devices vacuum switch and signal drive circuit are connected with CPU respectively;
Above-mentioned signal drive circuit comprises that voltage signal drive circuit, current signal drive circuit, the low alarm signal drive circuit of forward purchasing electricity charge remaining sum and forward purchasing electricity charge remaining sum are zero alarm signal drive circuit;
Above-mentioned signal drive circuit is connected with signal emission module.
Above-mentioned CPU also is connected with ZCT through the zero-sequence current acquisition module; Above-mentioned signal drive circuit also comprises the zero-sequence current drive circuit.
Above-mentioned signal emission module is a wireless signal transmitting module, and is corresponding with wireless receiving module.
Above-mentioned Switching Power Supply is connected with UPS, and the prepaid devices vacuum switch is connected with UPS.
Above-mentioned CPU also is connected with display module with input module.
Prepaid devices protected location of the present invention compared with prior art, the beneficial effect that is produced is:
The present invention utilizes elements such as the instrument transformer, circuit breaker of prepaid devices; Design a kind of prepaid devices integrated protection unit; Have short-circuit protection function, overcurrent protection function, zero sequence overcurrent protection function, wireless communication function etc., make prepaid devices have defencive function.Can under the situation that reduces the prepaid customers investment, realize the defencive function of customer equipment, also improve power supply reliability simultaneously.
(4) description of drawings
Accompanying drawing 1 is a FB(flow block) of the present invention;
Accompanying drawing 2 is a theory structure sketch map of the present invention.
Among the figure:
1, input module, 2, display module, 3, voltage transformer, 4, voltage acquisition module, 5, current transformer; 6, current acquisition module, 7, ZCT, 8, the zero-sequence current acquisition module, 9, pre-paying kilowatt-hour meter; 10, memory, 11, CPU, 12, Switching Power Supply, 13, UPS; 14, prepaid devices vacuum switch, 15, wireless transmitter module, 16, wireless receiving module, 17, signal drive circuit.
(5) embodiment
Explanation at length below below in conjunction with accompanying drawing prepaid devices protected location of the present invention being done.
Shown in accompanying drawing 1; Prepaid devices protected location of the present invention; Its structure comprises input module 1, display module 2, voltage transformer 3, voltage acquisition module 4, current transformer 5, current acquisition module 6, ZCT 7, zero-sequence current acquisition module 8, pre-paying kilowatt-hour meter 9, memory 10, CPU11, Switching Power Supply 12, UPS13, prepaid devices vacuum switch 14, wireless signal transmitting module 15, wireless receiving module 16 and signal drive circuit 17; Above-mentioned voltage transformer 3 is connected with CPU11 through voltage acquisition module 4; Current transformer 5 is connected with CPU11 through current acquisition module 6, and ZCT 7 is connected with CPU11 through zero-sequence current acquisition module 8; Input module 1, display module 2, pre-paying kilowatt-hour meter 9, memory 10, Switching Power Supply 12, prepaid devices vacuum switch 14 and signal drive circuit 17 are connected with CPU11 respectively; Above-mentioned UPS13 is connected with prepaid devices vacuum switch 14 with Switching Power Supply 12 respectively; Above-mentioned signal drive circuit 17 links to each other with wireless signal transmitting module 15, and 15 of wireless signal transmitting module are corresponding with wireless receiving module 16.
Above-mentioned signal drive circuit 17 comprises that voltage signal drive circuit, current signal drive circuit, zero-sequence current drive circuit, the low alarm signal drive circuit of forward purchasing electricity charge remaining sum and forward purchasing electricity charge remaining sum are zero alarm signal drive circuit.
Shown in accompanying drawing 2:
Above-mentioned input module 1 (like input keyboard) and display module 2 (like display) are formed the control display circuit of protected location, are used for to protected location input definite value, check functions such as report, video data.
The voltage collection circuit of above-mentioned voltage transformer 3 and voltage acquisition module 4 composition protected locations.The VAC-1 of voltage acquisition module 4 or VAC-2 gather voltage, receive input 1 pin and 2 pin of CPU11; When collection voltage was less than or equal to setting voltage value, time-delay 26 pin output trip signal drove relay K 1 after the comparison operation of CPU11 program, and K1-1 node action YFFKG circuit breaker trip was realized the short circuit trip avoidance function.The 24 pin output short circuit protection actuating signals of CPU11 drive relay K 3 simultaneously, and the K3-1 node action is through wireless signal transmitting module 15 emission short-circuit protection would trip signals.
Above-mentioned current transformer 5, current acquisition module 6 are formed the current acquisition circuit of protected locations.The IAC-1 of current acquisition module 6 or IAC2 gather electric current; Receive input 3 pin and 4 pin of CPU11; When gathering electric current more than or equal to the setting current value; Time-delay 26 pin output trip signal drives relay K 1 after the comparison operation of CPU11 internal processes, and K1-1 node action YFFKG circuit breaker trip is realized the overcurrent trip function.The overcurrent protection of 25 pin of CPU11 output simultaneously actuating signal drives relay K 2, and the K2-1 node action is through wireless signal transmitting module 15 emission overcurrent protection would trip signals.
Above-mentioned ZCT 7, zero-sequence current acquisition module 8 are formed the zero sequence excess current Acquisition Circuit of protected locations.The IAC-3 of zero-sequence current acquisition module 8 gathers zero-sequence current; Receive input 5 pin of CPU11; When gathering zero-sequence current more than or equal to the setting current value; Time-delay 26 pin output trip signal drives relay K 1 after the comparison operation of CPU11 internal processes, and K1-1 node action YFFKG circuit breaker trip was realized zero sequence current trip function.The zero-sequence current protection of 23 pin of CPU11 output simultaneously actuating signal drives relay K 4, and the K4-1 node action is through wireless signal transmitting module 15 emission overcurrent protection would trip signals.
The charge for electricity is small that alarm signal is zero circuit breaker trip signal with the forward purchasing electricity charge in pre-paying kilowatt-hour meter 9 forward purchasing, is input to protected location and forms forward purchasing electricity charge warning Acquisition Circuit.
The YFFDB-3 pre-paying kilowatt-hour meter warning node of pre-paying kilowatt-hour meter 9; Receive input 38 pin of CPU11; When forward purchasing electricity charge remaining sum is equal to or less than set point after the comparison operation of CPU11 internal processes 22 pin output forward purchasing the charge for electricity is small that alarm signal drives relay K 5, the K5-1 node action is through the low alarm signal of wireless signal transmitting module 15 emission forward purchasing electricity charge remaining sums.
The YFFDB-1 forward purchasing electricity charge remaining sum of pre-paying kilowatt-hour meter 9 is zero circuit breaker trip signal node; Receive input 39 pin of CPU11; 26 pin output trip signal drives relay K 1 after the comparison operation of CPU11 internal processes when forward purchasing electricity charge remaining sum is zero; K1-1 node action YFFKG circuit breaker trip; The forward purchasing of 21 pin of CPU11 output simultaneously electricity charge remaining sum is that zero circuit breaker trip signal drives relay K 6, and the K6-1 node action is zero circuit breaker trip signal through wireless signal transmitting module 15 emission forward purchasing electricity charge remaining sums.
Above-mentioned memory 10 is used for depositing the various data of protected location.
Above-mentioned CPU11 is the central processing unit of protected location, exports behind sequential operation according to the variation of input variable and drives corresponding peripheral cell, and CPU adopts 16 or 32 s' ARM embedded scm, can adopt 8 51 series monolithics.
The Switching Power Supply 12 and the prepaid devices vacuum switch 14 (circuit breaker) of above-mentioned UPS13 connection protection unit; Stabilized power supply is provided when voltage is low, for Switching Power Supply 12 and prepaid devices vacuum switch 14, Switching Power Supply 12 provides the galvanic current source to protected location.
Above-mentioned prepaid devices vacuum switch 14 is a circuit breaker, in order to this circuit breaker trip of protected location output trip command.
Above-mentioned wireless transmitter module 15, wireless receiving module 6 are formed the signal wireless output circuit of protected locations.
Claims (6)
1. prepaid devices protected location; Comprise voltage transformer (3), voltage acquisition module (4), current transformer (5), current acquisition module (6), pre-paying kilowatt-hour meter (9), memory (10), CPU (11), Switching Power Supply (12), prepaid devices vacuum switch (14) and signal drive circuit (17), it is characterized in that:
1) voltage transformer (3) is connected with CPU (11) through voltage acquisition module (4);
2) current transformer (5) is connected with CPU (11) through current acquisition module (6);
3) pre-paying kilowatt-hour meter (9), memory (10), Switching Power Supply (12), prepaid devices vacuum switch (14) and signal drive circuit (17) are connected with CPU (11) respectively;
Above-mentioned signal drive circuit (17) comprises that voltage signal drive circuit, current signal drive circuit, the low alarm signal drive circuit of forward purchasing electricity charge remaining sum and forward purchasing electricity charge remaining sum are zero alarm signal drive circuit;
Above-mentioned signal drive circuit (17) is connected with signal emission module.
2. prepaid devices protected location according to claim 1 is characterized in that, above-mentioned CPU (11) also is connected with ZCT (7) through zero-sequence current acquisition module (8); Above-mentioned signal drive circuit (17) also comprises the zero-sequence current drive circuit.
3. prepaid devices protected location according to claim 1 is characterized in that, above-mentioned signal emission module is wireless signal transmitting module (15), and is corresponding with wireless receiving module (16).
4. prepaid devices protected location according to claim 1 is characterized in that, above-mentioned Switching Power Supply (12) is connected with UPS (13).
5. prepaid devices protected location according to claim 1 is characterized in that, above-mentioned prepaid devices vacuum switch (14) is connected with UPS (13).
6. prepaid devices protected location according to claim 1 is characterized in that, above-mentioned CPU (11) also is connected with display module (2) with input module (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102912681A CN102394487A (en) | 2011-09-30 | 2011-09-30 | Protection unit of prepayment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102912681A CN102394487A (en) | 2011-09-30 | 2011-09-30 | Protection unit of prepayment device |
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| Publication Number | Publication Date |
|---|---|
| CN102394487A true CN102394487A (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102912681A Pending CN102394487A (en) | 2011-09-30 | 2011-09-30 | Protection unit of prepayment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242225A (en) * | 2014-09-22 | 2014-12-24 | 国家电网公司 | Intelligent integrated prepayment switch |
| CN111446126A (en) * | 2020-04-09 | 2020-07-24 | 华能伊敏煤电有限责任公司 | Switching device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2674461Y (en) * | 2003-12-22 | 2005-01-26 | 天津市申特高新技术开发公司 | Single-phase electronic type prepayment watt-hour meter |
| CN101398954A (en) * | 2008-10-29 | 2009-04-01 | 航天科工深圳（集团）有限公司 | Three phase pre-payment electric energy metered system and electric energy control device |
| CN201569701U (en) * | 2009-12-29 | 2010-09-01 | 中国电力科学研究院 | Single phase remote charge intelligent ammeter |
| CN202276130U (en) * | 2011-09-30 | 2012-06-13 | 张敬敏 | Prepayment device protection unit |
-
2011
- 2011-09-30 CN CN2011102912681A patent/CN102394487A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2674461Y (en) * | 2003-12-22 | 2005-01-26 | 天津市申特高新技术开发公司 | Single-phase electronic type prepayment watt-hour meter |
| CN101398954A (en) * | 2008-10-29 | 2009-04-01 | 航天科工深圳（集团）有限公司 | Three phase pre-payment electric energy metered system and electric energy control device |
| CN201569701U (en) * | 2009-12-29 | 2010-09-01 | 中国电力科学研究院 | Single phase remote charge intelligent ammeter |
| CN202276130U (en) * | 2011-09-30 | 2012-06-13 | 张敬敏 | Prepayment device protection unit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242225A (en) * | 2014-09-22 | 2014-12-24 | 国家电网公司 | Intelligent integrated prepayment switch |
| CN104242225B (en) * | 2014-09-22 | 2017-05-24 | 国家电网公司 | Intelligent integrated prepayment switch |
| CN111446126A (en) * | 2020-04-09 | 2020-07-24 | 华能伊敏煤电有限责任公司 | Switching device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 277600, No. 86, Dongfeng Road, Weishan County, Shandong, Jining province 18 Applicant after: Zhang Jingmin Co-applicant after: Chen Pengcheng Co-applicant after: Zhong Haifeng Co-applicant after: Wei Wei Co-applicant after: Liu Lian Address before: 277600, No. 86, Dongfeng Road, Weishan County, Shandong, Jining province 18 Applicant before: Zhang Jingmin Co-applicant before: Chen Pengcheng Co-applicant before: Zhong Haifeng Co-applicant before: Wei Wei Co-applicant before: Liu Lian |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Jingmin Inventor after: Chen Pengcheng Inventor after: Zhong Haifeng Inventor after: Wei Wei Inventor after: Liu Lian Inventor before: Zhang Jingmin Inventor before: Chen Pengcheng Inventor before: Zhong Haifeng Inventor before: Wei Wei Inventor before: Liu Lian |
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| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120328 |