CN204649821U - A kind of testing circuit of power collection systems - Google Patents
A kind of testing circuit of power collection systems Download PDFInfo
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- CN204649821U CN204649821U CN201520208708.6U CN201520208708U CN204649821U CN 204649821 U CN204649821 U CN 204649821U CN 201520208708 U CN201520208708 U CN 201520208708U CN 204649821 U CN204649821 U CN 204649821U
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Abstract
The utility model provides a kind of testing circuit of power collection systems, is applied to single-phase or three-phase circuit, comprises: bleeder circuit, treatment circuit, comparator circuit and detection signal output circuit; The voltage signal dividing potential drop of direct supply is low reference voltage signal and high reference voltage signal by described bleeder circuit, and exports described comparator circuit to respectively by low reference voltage output terminal and high reference voltage output terminal; Described treatment circuit receives the ac signal that Acquisition Circuit sends, and formation average-voltage signal transfers in described comparator circuit after treatment; The described average-voltage signal received compares with described low reference voltage signal and high reference voltage signal by described comparator circuit respectively, and forms detection signal and be sent to described detection signal output circuit; Described detection signal output circuit, according to the described detection signal received, is exported in corresponding circuit; Thus power collection systems is operated in normal range.
Description
Technical field
The utility model relates to power domain, is specifically related to a kind of testing circuit of power collection systems.
Background technology
Power collection systems is the system gathering the power information of power consumer, process and monitor in real time, realizes the functions such as the automatic collection of power information, metering exception monitoring, electric energy quality monitoring, electrical energy consumption analysis and management, relevant information are issued, distributed energy is monitored, the information interaction of intelligent power equipment.
The acquisition terminal of power collection systems is generally AC single phase or three phase supply to the requirement of working power.For power collection systems, the supply voltage of each equipment of its internal system there is fluctuation, therefore, can have influence on the normal work of power collection systems.Such as: for electric equipments all in circuit acquisition system, have a rated voltage, but in practice, can not ensure completely to work under rated voltage, be a scope near rated voltage, General Requirements is ± 15%.In order to protective device equipment and process quality, if lower than-15% this voltage, be exactly " under-voltage "; Contrary, when working under the condition exceeding rated voltage, then produce superpressure situation.And those situations all can have influence on power collection systems to normal work
For enabling each equipment in power collection systems be operated in normal range, needing to provide a kind of testing circuit, sending different control signals according to the voltage signal detected, ensure the normal work of system.
Utility model content
The utility model provides a kind of power collection systems testing circuit, causes to solve the existing voltage due to power collection systems collection existence fluctuation the problem that power collection systems cannot normally work.
The utility model provides a kind of testing circuit of power collection systems, is applied to single-phase or three-phase circuit, comprises: bleeder circuit, treatment circuit, comparator circuit and detection signal output circuit; Wherein, the voltage signal dividing potential drop of direct supply is low reference voltage signal and high reference voltage signal by described bleeder circuit, and exports described comparator circuit to respectively by low reference voltage output terminal and high reference voltage output terminal; Described treatment circuit receives the ac signal that Acquisition Circuit sends, and formation average-voltage signal transfers in described comparator circuit after treatment; The described average-voltage signal received compares with described low reference voltage signal and high reference voltage signal by described comparator circuit respectively, and forms detection signal and be sent to described detection signal output circuit; Described detection signal output circuit, according to the described detection signal received, is exported in corresponding circuit.
Preferably, described bleeder circuit comprises: the first resistance group of the multiple resistance of series connection and the second resistance group of multiple resistance of mutually connecting mutually; Described first resistance group and the second resistance group be connected in parallel on power supply input end and ground hold between; Described first resistance group described low reference voltage output terminal is set near described the resistance input end held; Described second resistance group described high reference voltage output terminal is set near described the resistance input end held; Between described low reference voltage output terminal with described end, be connected the first electric capacity, between described high reference voltage output terminal with described end, be connected the second electric capacity.
Preferably, described first resistance group comprises: the first resistance, the second resistance and the 3rd resistance; Described second resistance group comprises: the 4th resistance, the 5th resistance and the 6th resistance.
Preferably, described treatment circuit comprises: exchange bleeder circuit and amplifier treatment circuit; Described interchange bleeder circuit comprises: be serially connected in respectively each cross streams electric signal input end and ground hold between the 7th resistance and the 8th resistance; Described amplifier process single channel comprises: the first operational amplifier and the second operational amplifier, and wherein, described 7th resistance is connected the positive input terminal of the first operational amplifier with the common port of the 8th resistance; The negative input end of described first operational amplifier be connected the first diode between output terminal; The second diode is connected between the output terminal of described first operational amplifier and the positive input terminal of the second operational amplifier; Between the negative input end and the output terminal of described second operational amplifier of described first operational amplifier, be connected in series the 9th resistance and the tenth resistance, the negative input end of described second operational amplifier is connected between the 9th resistance and the tenth resistance.
Preferably, described treatment circuit also comprises: filtering circuit; The output terminal of described filtering circuit is connected with the power end of described first operational amplifier; Second operational amplifier output terminal exports average-voltage signal, and is sent to described comparator circuit input end.
Preferably, described comparator circuit comprises the first comparer and the second comparer; Second operational amplifier output terminal of described treatment circuit and described first comparer positive input terminal, described first comparer negative input end is connected with the low reference voltage output terminal of described bleeder circuit; Described first comparator output terminal is corresponding with the input end of described detection signal output circuit to be connected; The positive input terminal of described second comparer receives the average-voltage signal of described treatment circuit output terminal output; The negative input end of described second comparer is connected with the high reference voltage output terminal of described bleeder circuit, and the output terminal of described second comparer is connected with the input end of described detection signal output circuit.
Preferably, described detection signal output circuit receives the detection signal exported from described comparator circuit, and diode is set on described detection signal output circuit, form line and signal, form trigger pip according to described line and signal and be sent in corresponding circuit.
Preferably, the direct current supply voltage signal that described bleeder circuit receives is 3.3V.
Preferably, the supply voltage signal of described low reference voltage output terminal is 1.25V; The supply voltage signal of described high reference voltage output terminal is 2.08V.
Compared with prior art, the utility model has the following advantages:
The testing circuit of the power collection systems that the utility model provides, the ac voltage signal of collection is obtained average-voltage signal through processing circuit processes, those average-voltage signal are sent in testing circuit, in testing circuit, those average-voltage signal are compared with low reference voltage signal and high reference voltage signal respectively, obtain testing result, those testing results are sent to control circuit, control circuit controls according to each testing result, the ac voltage signal realized gathering detects, power collection systems is made to be operated in normal range, the voltage signal owing to gathering is avoided to there is the situation of under-voltage or superpressure and cause power collection systems normally to work.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment and technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment and description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structured flowchart of a kind of power collection systems testing circuit that the utility model provides;
Fig. 2 is the circuit diagram of a kind of power collection systems testing circuit first embodiment that the utility model provides.
Embodiment
Below by engaging the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to shown in Fig. 1, Fig. 1 is a kind of power collection systems testing circuit that the utility model provides.Comprise: bleeder circuit 100, treatment circuit 200, comparator circuit 300 and detection signal output circuit 400; Wherein, the voltage signal dividing potential drop of DC power supply is low reference voltage signal and high reference voltage signal by described bleeder circuit 100, and exports described testing circuit 300 to respectively by low reference voltage output terminal and high reference voltage output terminal; Described treatment circuit 200 receives the ac signal that Acquisition Circuit sends, and after described ac signal being carried out the process such as dividing potential drop, forms average-voltage signal, transferred to by described average-voltage signal in described comparator circuit 300; The described average-voltage signal received compares with described low reference voltage signal and high reference voltage signal by described comparator circuit 300 respectively, and the detection signal formed more afterwards is sent to described detection signal output circuit 400, described detection signal output circuit 400 according to the described detection signal received, and forms detection signal and is exported in corresponding circuit.
The voltage signal that the utility model detects according to testing circuit, realizes detecting the supply voltage of each equipment in power collection systems or power collection systems, and realizes the controls such as follow-up relative alarm according to testing result.
For testing circuit provided by the utility model, the powering mode adopting three-phase electricity is that embodiment is described.The ac voltage signal gathered in this treatment circuit 200 is divided into three tunnels, that is: A phase, B phase and C phase.Be understandable that, the testing circuit 300 that the utility model provides also can be applied in single-phase electricity pattern.
Be described in detail to each ingredient in testing circuit by the first embodiment to the testing circuit of the power collection systems that the utility model provides below in conjunction with Fig. 2, Fig. 2 is the circuit diagram of a kind of power collection systems testing circuit first embodiment that the utility model provides.
The power collection systems testing circuit that the utility model provides comprises: bleeder circuit 100, treatment circuit 200, comparator circuit 300 and detection signal output circuit 400, wherein, bleeder circuit 100 adopts the supply voltage signal of 3.3V, the voltage signal of this 3.3V carries out dividing potential drop through the first resistance group parallel with one another and the second resistance group, form low reference voltage signal 1.25V and high reference voltage signal 2.08V, and export respectively by low reference voltage and the output of high reference voltage output terminal.Wherein, the first resistance group comprises: the first resistance 1, second resistance 2 and the 3rd resistance 3, and described first resistance 1/ second resistance 2/ the 3rd resistance 3 is connected mutually; Second resistance 2 groups comprises: the 4th resistance 4, the 5th resistance 5 and the 6th resistance 6, and described four/five/six resistance is connected mutually; First resistance 1 group and the second resistance 2 groups be connected in parallel on described supply voltage input end and ground hold between.Described low reference voltage output terminal is arranged between two resistance in seriess of closely holding, that is: between described second resistance 2 and the 3rd resistance 3; Described high reference voltage exports between two crosstalks resistances being arranged at and closely holding, that is: between described 5th resistance 5 and the 6th resistance 6.For avoiding superpotential generation, the utility model is provided with first electric capacity in parallel with the 3rd resistance 3 between low reference voltage output terminal is held with ground; Second electric capacity in parallel with the 6th resistance 6 is provided with between high reference voltage output terminal is held with ground.
Treatment circuit 200 comprises interchange bleeder circuit 201 and amplifier process single channel 203, and the harmonic wave in order to produce in treatment circuit, can also comprise filtering circuit 202.Exchange bleeder circuit 201 to be by the supply voltage of collection or to carry out dividing potential drop, because the layout of A, B, C phase is identical, therefore, below only A phase is described, this treatment circuit 200 specifically comprises: arrange the 3rd electric capacity at treatment circuit 200 current input terminal (namely three-phase alternating current output terminal), between described 3rd electric capacity is held with ground, be connected in series the 7th resistance 7 and the 8th resistance 8; Amplifier treatment circuit 203 is described 7th resistance 7 is connected the first operational amplifier positive input terminal with the common port of the 8th resistance 8, the negative input end of described first operational amplifier be connected the first diode between output terminal, form the first closed loop discharge circuit; The second diode is connected between the output terminal of described first operational amplifier and the positive input terminal of the second operational amplifier, output terminal and the second operational amplifier positive input terminal of described second diode are connected with stake resistance, between the first operational amplifier negative input end and the second operational amplifier output terminal, be connected in series the 9th resistance 9 and the tenth resistance 10; Described second operational amplifier negative input end is connected between the 9th resistance 9 and the tenth resistance 10, forms the second closed loop discharge circuit; The output terminal of the second operational amplifier exports average-voltage signal, and is sent to described testing circuit 300 input end.
Under three-phase electricity powering mode, the average-voltage signal that described second operational amplifier output terminal exports can be AVA, AVB and AVC.
For avoiding there is ripple in treatment circuit 200, the utility model is connected with filtering circuit on the first operational amplifier, filtering is carried out to the direct supply of discharge circuit, thus ensure that the direct current entering discharge circuit is pure, this filtering circuit can be connected on other output pins of the first operational amplifier, pin 4,8 as shown in Figure 2.
Filtering circuit comprises: the first filter capacitor and the second filter capacitor, be serially connected between direct supply and reference voltage, and hold with being connected between the first filter capacitor and the second filter capacitor.
Comparator circuit 300 comprises: be arranged on the first comparer on described each phase circuit and the second comparer; The output terminal of described treatment circuit 200 second operational amplifier is connected with described first comparer positive input terminal, and described first comparer negative input end is connected with the low reference voltage output terminal of described bleeder circuit 100; Described first comparator output terminal connects with in described detection signal output circuit 400, the input end of each phase circuit is corresponding; The positive input terminal of described second comparer is connected with the second operational amplifier output terminal; The negative input end of described second comparer is connected with the high reference voltage output terminal of described bleeder circuit 100, and the output terminal of described second comparer is corresponding with the input end of described detection signal output circuit 400 to be connected.
Detection signal output circuit 400 receives the detection signal exported from described comparator circuit 300, and respectively with the diode be arranged on each phase circuit of described detection signal output circuit 400, form line and signal, according to line and signal trigger alarm circuit alarm or KONGZHI circuit.
Above the structure of a kind of testing circuit that the utility model provides is described, below in conjunction with testing circuit structure, the principle of work of this testing circuit is described.Whether the power supply that the utility model provides testing circuit to may be used for detecting power collection systems is normal, whether the power supply that also can detect a certain equipment or device in power collection systems is normal, or the voltage detecting of voltage transformer (VT) (hereinafter referred to as PT) secondary circuit in power collection systems.Illustrate with the voltage detecting of PT secondary circuit in power collection systems, as follows:
The error of power collection systems, can comprise: the error in dipping etc. that the resultant error of PT summation current transformer (hereinafter referred to as CT), the error of electric energy meter, PT secondary circuit voltage drop cause.The error in dipping that the pressure drop of PT secondary wiring causes is maximum, and it is that long range propagation can produce very large pressure drop, also just creates very large error because PT secondary singal needs longer cable transmission to receive electric energy meter to pulpit.The utility model can detect the detection of transmitting terminal and receiving-end voltage in PT secondary circuit.
The utility model testing circuit provides the direct supply of a 3.3V, and specific works principle is as follows:
First, be that the voltage signal of the PT secondary circuit transmitting terminal of low reference voltage signal V1-L and high reference voltage signal V2-H and collection compares by 3.3V voltage, be specially, the three-phase alternating current voltage signal collecting PT secondary circuit transmitting terminal is carried out dividing potential drop and carry out filtering to the direct supply entering into discharge circuit before amplifier by treatment circuit 200, thus obtain the average-voltage signal of each phase, that is: AVA, AVB and AVC; The average-voltage signal of correspondence is sent to the first comparer LM393 positive input terminal of each phase in comparator circuit 300 and the negative input end of the second comparer LM393 by each phase circuit respectively; The negative input end of the first comparer receives low reference voltage signal, is compared by its average-voltage signal with the first comparer positive input terminal; The positive input terminal of the second comparer receives high reference voltage signal, is compared by its average-voltage signal with the second comparer negative input end.
Under normal circumstances, the value of the three-phase voltage signal collected meets following requirement, that is: V1-L < AVA < V2-H, V1-L < AVB < V2-H, V1-L < AVC < V2-H, the average-voltage signal received when comparator circuit 300 compares with height reference voltage, average-voltage signal is between V1-L to V2-H scope, then the output of detection signal output circuit 400 is normal; The average-voltage signal received when comparator circuit 300 compares with low reference voltage, and when average-voltage signal is lower than V1-L voltage signal, then comparator circuit 300 output voltage is low; When average-voltage signal and the high reference voltage compare of comparator circuit 300 reception, when average-voltage signal is higher than V2-H voltage signal, comparator circuit 300 output voltage is high, detection signal output circuit 400 receives the high signal that comparator circuit 300 exports, and output detections signal is not to warning circuit (figure is depending on going out).
The signal that comparator circuit 300 exports comprises: faultA_L, faultA_H, faultB_L, faultB_H, faultC_L, faultC_H;
The low reference voltage signal that the average-voltage signal received is connected with the first comparer negative input end is compared the first fiducial value obtaining each phase by the first comparer, that is: faultA_L, faultB_L and faultC_L, those first fiducial values export detection signal output circuit 400 to by the first comparator output terminal; The high reference voltage signal that the average-voltage signal received is connected with the negative input end of the second comparer is compared the second fiducial value obtaining each phase by the second comparer, that is: faultA_H, faultB_H and faultC_H, those second fiducial values export detection signal output circuit 400 to by the second comparator output terminal.Wherein, described faultA_L is A phase voltage undervoltage alarm signal, faultA_H is A phase voltage superpressure alarm signal, faultB_L is B phase voltage undervoltage alarm signal, faultB_H is B phase voltage superpressure alarm signal, faultC_L is C phase voltage undervoltage alarm signal, and faultC_H is C phase voltage superpressure alarm signal; Those detection signals are sent to detection signal output circuit 400 input end by comparator circuit 300, and those signals are sent in corresponding circuit according to different circuit by detection signal output circuit 400.
In addition, diode is provided with between every output terminal and the every input end of detection signal output circuit 400 of comparator circuit 300, the detection signal that detection signal output circuit 400 input end receives forms line and signal through diode, when the line of every output and signal are high level, testing result is normal, diode D46 (as shown in Figure 2) is switched on, and line and signal have KONGZHI to hold to export; When the line that line and signal export and signal are low level, testing result is fault, diode D46 (as shown in Figure 2) is then cut off, line and signal export warning circuit to by fault, that is, when the circuit in power collection systems occurs superpressure or be under-voltage, line and signal export warning circuit to by fault.
Above to the utility model provide a kind of testing circuit of power collection systems to be described in detail, apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications.In sum, this description should not be construed as restriction of the present utility model.
Claims (9)
1. a testing circuit for power collection systems, is applied to single-phase or three-phase circuit, it is characterized in that, comprising: bleeder circuit, treatment circuit, comparator circuit and detection signal output circuit;
Wherein, the voltage signal dividing potential drop of direct supply is low reference voltage signal and high reference voltage signal by described bleeder circuit, and exports described comparator circuit to respectively by low reference voltage output terminal and high reference voltage output terminal;
Described treatment circuit receives the ac signal that Acquisition Circuit sends, and formation average-voltage signal transfers in described comparator circuit after treatment;
The described average-voltage signal received compares with described low reference voltage signal and high reference voltage signal by described comparator circuit respectively, and forms detection signal and be sent to described detection signal output circuit;
Described detection signal output circuit, according to the described detection signal received, is exported in corresponding circuit.
2. the testing circuit of power collection systems according to claim 1, is characterized in that, described bleeder circuit comprises: the first resistance group of the multiple resistance of series connection and the second resistance group of multiple resistance of mutually connecting mutually; Described first resistance group and the second resistance group be connected in parallel on power supply input end and ground hold between; Described first resistance group described low reference voltage output terminal is set near described the resistance input end held; Described second resistance group described high reference voltage output terminal is set near described the resistance input end held; Between described low reference voltage output terminal with described end, be connected the first electric capacity, between described high reference voltage output terminal with described end, be connected the second electric capacity.
3. the testing circuit of power collection systems according to claim 2, is characterized in that: described first resistance group comprises: the first resistance, the second resistance and the 3rd resistance; Described second resistance group comprises: the 4th resistance, the 5th resistance and the 6th resistance.
4. the testing circuit of power collection systems according to claim 1, is characterized in that: described treatment circuit comprises: exchange bleeder circuit and amplifier treatment circuit; Described interchange bleeder circuit comprises: be serially connected in respectively each cross streams electric signal input end and ground hold between the 7th resistance and the 8th resistance; Described amplifier process single channel comprises: the first operational amplifier and the second operational amplifier, and wherein, described 7th resistance is connected the positive input terminal of the first operational amplifier with the common port of the 8th resistance; The negative input end of described first operational amplifier be connected the first diode between output terminal; The second diode is connected between the output terminal of described first operational amplifier and the positive input terminal of the second operational amplifier; Between the negative input end and the output terminal of described second operational amplifier of described first operational amplifier, be connected in series the 9th resistance and the tenth resistance, the negative input end of described second operational amplifier is connected between the 9th resistance and the tenth resistance.
5. the testing circuit of power collection systems according to claim 4, is characterized in that, described treatment circuit also comprises: filtering circuit; The output terminal of described filtering circuit is connected with the power end of described first operational amplifier; Second operational amplifier output terminal exports average-voltage signal, and is sent to described comparator circuit input end.
6. the testing circuit of power collection systems according to claim 1, is characterized in that: described comparator circuit comprises the first comparer and the second comparer; Second operational amplifier output terminal of described treatment circuit and described first comparer positive input terminal, described first comparer negative input end is connected with the low reference voltage output terminal of described bleeder circuit; Described first comparator output terminal is corresponding with the input end of described detection signal output circuit to be connected; The positive input terminal of described second comparer receives the average-voltage signal of described treatment circuit output terminal output; The negative input end of described second comparer is connected with the high reference voltage output terminal of described bleeder circuit, and the output terminal of described second comparer is connected with the input end of described detection signal output circuit.
7. the testing circuit of power collection systems according to claim 1, it is characterized in that: described detection signal output circuit receives the detection signal exported from described comparator circuit, and diode is set on described detection signal output circuit, form line and signal, form trigger pip according to described line and signal and be sent in corresponding circuit.
8. the testing circuit of power collection systems according to claim 1, is characterized in that: the direct current supply voltage signal that described bleeder circuit receives is 3.3V.
9. the testing circuit of power collection systems according to claim 7, is characterized in that: the supply voltage signal of described low reference voltage output terminal is 1.25V; The supply voltage signal of described high reference voltage output terminal is 2.08V.
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| CN201520208708.6U CN204649821U (en) | 2015-04-08 | 2015-04-08 | A kind of testing circuit of power collection systems |
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| CN201520208708.6U CN204649821U (en) | 2015-04-08 | 2015-04-08 | A kind of testing circuit of power collection systems |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911329A (en) * | 2016-06-15 | 2016-08-31 | 电子科技大学 | Multi-detection-point voltage detection circuit used for energy collection system |
| CN106646077A (en) * | 2016-11-18 | 2017-05-10 | 深圳市有方科技股份有限公司 | Detection apparatus used for detecting open and short circuit of load |
| CN113791348A (en) * | 2021-09-28 | 2021-12-14 | 中国科学院半导体研究所 | Phase signal detection device of alternating current generator |
-
2015
- 2015-04-08 CN CN201520208708.6U patent/CN204649821U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911329A (en) * | 2016-06-15 | 2016-08-31 | 电子科技大学 | Multi-detection-point voltage detection circuit used for energy collection system |
| CN106646077A (en) * | 2016-11-18 | 2017-05-10 | 深圳市有方科技股份有限公司 | Detection apparatus used for detecting open and short circuit of load |
| CN113791348A (en) * | 2021-09-28 | 2021-12-14 | 中国科学院半导体研究所 | Phase signal detection device of alternating current generator |
| CN113791348B (en) * | 2021-09-28 | 2023-02-24 | 中国科学院半导体研究所 | Phase signal detection device of alternating current generator |
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Effective date of registration: 20160922 Address after: 100176, Beijing Yizhuang Daxing District Economic Development Zone, No. 16, Zhonghe street, Zhonghe science and Technology Park, building 5 Patentee after: QIANJIANG (BEIJING) INFORMATION TECHNOLOGY CO.,LTD. Address before: 100176 Beijing Yizhuang Daxing District economic development zone and 16 Zhonghe street, Zhonghe science and Technology Park, building 5 Patentee before: Yijiang (Beijing) Technology Development Co.,Ltd. |
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Granted publication date: 20150916 |