CN203825173U - Ripple coefficient monitoring device of DC power complete plant - Google Patents
Ripple coefficient monitoring device of DC power complete plant Download PDFInfo
- Publication number
- CN203825173U CN203825173U CN201420186398.8U CN201420186398U CN203825173U CN 203825173 U CN203825173 U CN 203825173U CN 201420186398 U CN201420186398 U CN 201420186398U CN 203825173 U CN203825173 U CN 203825173U
- Authority
- CN
- China
- Prior art keywords
- ripple
- monitoring device
- voltage
- ripple factor
- direct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Rectifiers (AREA)
Abstract
The utility model relates to a ripple coefficient monitoring device of a DC power complete plant. The input end of an AC/DC separating unit is connected with a signal input port. The output end of the AC/DC separating unit is connected with the input end of an A/D conversion module. The output end of the A/D conversion module is connected with a MPU. A bus +KM/-KM is connected with the AC/DC separating unit, so that bus voltage signals are obtained. The AC/DC separating unit separates alternating components in 220V direct current. The alternating components are input to the A/D conversion module. With alternating component 0.02S as one cycle, an AC maximum value Uf and a minimum value Ug are converted to voltage digits, and the digits are input to the MPU to process. The average value Up of the direct component is directly input to the MPU. From numerical values of the A/D conversion module, the average values of maximum values and minimum values of 50 continuous cycles, and DC voltage values at the same time are taken to calculate a ripple coefficient. The device satisfies requirements of monitoring the ripple coefficient frequently.
Description
Technical field
The utility model relates to a kind of direct supply set of equipments ripple factor monitoring device.
Background technology
Ripple is a kind of phenomenon causing due to the voltage fluctuation of DC stable power supply, because DC stable power supply is generally formed through links such as rectifying and voltage-stabilizings by AC power, this just inevitably in DC stabilization amount how much with some Alternating Components, this AC compounent being superimposed upon in DC stabilization amount is just referred to as ripple.
The method for expressing of ripple can represent with effective value or peak value, can also can represent by relative quantity by absolute magnitude.Ripple factor be exactly ripple relative quantity: ripple factor=ripple voltage/output voltage.
The ripple of direct supply has the harm of electrical network: make, in electrical network, resonance occurs and cause excess current or superpotential and accidents caused; Increase added losses, reduce efficiency and the plant factor of generating, transmission of electricity and consumer; Make electric equipment operation undesired, accelerate insulation ag(e)ing, thereby shorten their serviceable life; Relay protection, aut.eq., computer system and the running of many consumers are undesired or can not regular event or operation; Make measurement and gauging instrument, instrument correctly not indicate or to measure; Interfere with communications system, the transmission quality of reduction signal, the normal delivery of destruction signal, even defective communication equipment.
Along with improving constantly of Power Electronic Technique and microcomputer technology level, the protective relaying device of microcomputer type uses in a large number in power transformation technology.What provide working power to protective relaying device is mostly DC UPS, and ripple size is most important for the reliability service of microcomputer device, also just becomes an important parameter of microcomputer reliability service.Valve controlling type accumulator requires very strict to the ripple of charging set, the ripple factor of direct supply directly plays important impact to the safety of electrical network, and relevant specification has also been made regulation to ripple.
In DL/T 5044-95 " fuel-burning power plant, transforming station direct current system designing technique regulation ", point out: when silicon rectifying charging unit and accumulator parallel running, the ripple factor being caused by charging equipment should not be greater than 2%.DL 478-92 " static relay protection and automatic safety device general technical specifications " also regulation d.c.power voltage ripple coefficient should not be greater than 2%.DL/724-2000, GB/T856-2005, also clearly proposed the requirement of direct supply ripple.
The numerical value of ripple factor and ripple voltage is intrinsic characteristic along with long-term charging operation can change." 18 great anti-accident measures of electrical network of State Grid Corporation of China " 13.2.1.2 bar has been mentioned and has been wanted periodic monitoring ripple factor, undesirable should adjustment it in time.
Ripple factor is monitored, and conventional monitoring mode mainly contains two kinds at present:
1) operation, maintainer utilize oscillograph or the regular personal monitoring's busbar voltage of digital ripple multimeter AC compounent.This monitoring mode is simple, discontinuous, is applicable to still not possess the DC power system of ripple factor monitoring, alarming function and DC power system in the time of the interim off-the-line operation of accumulator, must the moment carry out personal monitoring.
2) directly adopt the ripple characteristics tester on market to monitor ripple factor.This monitoring mode is directly perceived, but discontinuous and cost is higher.
Above two kinds of methods are not the monitoring devices that direct current set of equipments carries, and measure discontinuous and need extra tester, and testing staff needs the skilled use of grasping instrument simultaneously.
Utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of direct supply set of equipments ripple factor monitoring device is provided.
The purpose of this utility model is achieved through the following technical solutions:
Direct supply set of equipments ripple factor monitoring device, feature is: comprise alternating current-direct current separative element and A/D modular converter, the input end of alternating current-direct current separative element is connected to signal input port, the output terminal of alternating current-direct current separative element connects the input end of A/D modular converter, and the output terminal of A/D modular converter connects microprocessing unit.
Further, above-mentioned direct supply set of equipments ripple factor monitoring device, described alternating current-direct current separative element is the RC loop being made up of capacitor C and resistance R.
Further, above-mentioned direct supply set of equipments ripple factor monitoring device, described microprocessing unit connects a display device.
Further, above-mentioned direct supply set of equipments ripple factor monitoring device, described microprocessing unit is single-chip microcomputer.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
Can meet the requirement of regular monitoring ripple factor, need not carry out continuous detecting by external instrument.Economical rationality, easy to operate, can monitor continuously at any time, and time saving and energy saving, less demanding to testing staff's technical ability.On existing charging and floating machine, increase ripple factor monitoring device.Effective real-time measurement ripple factor when DC power system operation, for the safe reliability that improves protective relaying device and direct-flow storage battery, tool is of great significance, and increases ripple factor monitoring modular in direct supply complete equipment, economic, practical.
Brief description of the drawings
Below in conjunction with accompanying drawing, technical solutions of the utility model are described further:
Fig. 1: organigram of the present utility model;
Fig. 2: the principle schematic of alternating current-direct current separative element.
Embodiment
As shown in Figure 1, direct supply set of equipments ripple factor monitoring device, comprise alternating current-direct current separative element 1 and A/D modular converter 2, the input end of alternating current-direct current separative element 1 is connected to signal input port, the output terminal of alternating current-direct current separative element 1 connects the input end of A/D modular converter 2, the output terminal of A/D modular converter 2 connects microprocessing unit 3, and microprocessing unit 3 can adopt single-chip microcomputer, and microprocessing unit 3 connects display device 4.
As shown in Figure 2, alternating current-direct current separative element is the RC loop being made up of capacitor C and resistance R.
The flow process of direct supply set of equipments ripple factor monitoring is:
A) signal input separates with alternating current-direct current: bus+KM/-KM is connected alternating current-direct current separative element, obtains bus voltage signal, and alternating current-direct current separative element is isolated the AC compounent in 220V direct current; Alternating current-direct current separative element is the RC loop being made up of capacitor C and resistance R, RC loop be connected to bus+KM and-KM between, the voltage measuring in resistance R is exactly AC compounent, the voltage in capacitor C is exactly DC voltage component; Under stable state situation, as long as capacitance and resistance value are reasonable, the decay of AC compounent can be ignored, general R get 1K when above the damping capacity of AC compounent can ignore;
B) A/D conversion: AC compounent is directly inputted in A/D modular converter, taking AC compounent 0.02S(50HZ) be one-period, its peak values of ac Uf and valley Ug are converted to and input to microprocessing unit after voltage digital and process, the mean value Up of DC component is directly inputted into microprocessing unit, carries out computing;
C) micro-processing: from the numerical value of A/D modular converter, get respectively the peak value in continuous 50 cycles and the mean value of valley and with the DC voltage value in the time, calculate as follows ripple factor:
D=（Uf-Ug）/2Up
D-ripple factor;
The peak value of pulsing in Uf-DC voltage;
The valley of pulsing in Ug-DC voltage;
Up-DC voltage average value;
In the DC voltage of output, the half of the difference of percent ripple peak value and valley, with the ratio of VD mean value;
Thereby obtain busbar voltage ripple factor.
Show selectively data by display device: bus DC voltage, bus ripple voltage effective value, busbar voltage ripple factor.
By combined-voltage separating and measuring circuit, the monitored module of magnitude of voltage measuring receives, and transfers data to microprocessor calculate rear output ripple coefficient results by RS485 communication port.
Directly adopt ripple characteristics proving installation to carry out monitoring, alarming to ripple factor, can obtain busbar voltage peak-to-peak value by analog form or digital form, in the time that ripple factor is above standard setting, report to the police immediately; Straight-flow system, if any remote signaling function, should be delivered to up-computer by this alerting signal, so that operation, maintainer processes in time.
Can meet the requirement of regular monitoring ripple factor, need not carry out continuous detecting by external instrument.Economical rationality, easy to operate, can monitor continuously at any time, and time saving and energy saving, less demanding to testing staff's technical ability.On existing charging and floating machine, increase ripple factor monitoring device.Effective real-time measurement ripple factor when DC power system operation, for the safe reliability that improves protective relaying device and direct-flow storage battery, tool is of great significance, and increases ripple factor monitoring modular in direct supply complete equipment, economic, practical.
It is emphasized that: be only preferred embodiment of the present utility model above, not the utility model is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all still belong in the scope of technical solutions of the utility model.
Claims (4)
1. direct supply set of equipments ripple factor monitoring device, it is characterized in that: comprise alternating current-direct current separative element and A/D modular converter, the input end of alternating current-direct current separative element is connected to signal input port, the output terminal of alternating current-direct current separative element connects the input end of A/D modular converter, and the output terminal of A/D modular converter connects microprocessing unit.
2. direct supply set of equipments ripple factor monitoring device according to claim 1, is characterized in that: described alternating current-direct current separative element is the RC loop being made up of capacitor C and resistance R.
3. direct supply set of equipments ripple factor monitoring device according to claim 1, is characterized in that: described microprocessing unit connects a display device.
4. direct supply set of equipments ripple factor monitoring device according to claim 1, is characterized in that: described microprocessing unit is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420186398.8U CN203825173U (en) | 2014-04-17 | 2014-04-17 | Ripple coefficient monitoring device of DC power complete plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420186398.8U CN203825173U (en) | 2014-04-17 | 2014-04-17 | Ripple coefficient monitoring device of DC power complete plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825173U true CN203825173U (en) | 2014-09-10 |
Family
ID=51480655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420186398.8U Expired - Fee Related CN203825173U (en) | 2014-04-17 | 2014-04-17 | Ripple coefficient monitoring device of DC power complete plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825173U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941197A (en) * | 2014-04-17 | 2014-07-23 | 苏州市华东电网电气有限公司 | Monitoring device and method for direct-current power source complete equipment ripple factor |
| CN107037362A (en) * | 2017-05-26 | 2017-08-11 | 广东电网有限责任公司惠州供电局 | A kind of DC charging motor ripple monitoring device |
-
2014
- 2014-04-17 CN CN201420186398.8U patent/CN203825173U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941197A (en) * | 2014-04-17 | 2014-07-23 | 苏州市华东电网电气有限公司 | Monitoring device and method for direct-current power source complete equipment ripple factor |
| CN107037362A (en) * | 2017-05-26 | 2017-08-11 | 广东电网有限责任公司惠州供电局 | A kind of DC charging motor ripple monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103454517B (en) | Capacitance type potential transformer on-line monitoring method | |
| CN201886066U (en) | Transformer core grounding current monitor | |
| CN100557731C (en) | A kind of electronic mutual inductor with anti-stealing electricity function | |
| CN201583631U (en) | Online-detecting device and system of storage battery | |
| CN103941197A (en) | Monitoring device and method for direct-current power source complete equipment ripple factor | |
| CN103701135A (en) | Intelligent series compensation device for distribution network and use method of compensation device | |
| CN101216503A (en) | Hierarchical type electricity anti-theft system and method | |
| US20120316806A1 (en) | Method and Device for Monitoring Energy Efficiency Performance of Equipment | |
| CN203825173U (en) | Ripple coefficient monitoring device of DC power complete plant | |
| CN203536971U (en) | Series connection compensation device for intelligent distribution network | |
| CN203691402U (en) | Integrated repeater | |
| CN104319895A (en) | Intelligent distributing line monitoring terminal | |
| CN206876300U (en) | A kind of cable connector core temp measuring system based on monitoring cable grounding electric current | |
| CN104198953B (en) | Two-way operational testing system and method for electric automobile charge-discharge device | |
| CN203243118U (en) | Voltage monitor | |
| CN203349964U (en) | Self-energy-obtaining wireless temperature sensing chip | |
| CN106525265B (en) | Wireless temperature monitoring and indicating device for capacitor | |
| CN214850476U (en) | Protection circuit of power line carrier PLC collector | |
| CN109660018A (en) | A kind of transmission line of electricity sensing electricity getting device based on Rogowski coil | |
| CN202474745U (en) | Automatic cable transfer box for power distribution | |
| CN101887993A (en) | Nickel-hydrogen battery pack provided with detection device | |
| CN204314413U (en) | A kind of cable short circuit detecting device | |
| CN201682330U (en) | Power supply of Zigbee wireless temperature sensor | |
| CN203119627U (en) | Intelligent comprehensive management system of base station power supply | |
| CN202230159U (en) | Fault monitoring device of electric equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20190417 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |