CN105301418A - Electric energy quality monitoring system and operating method thereof - Google Patents
Electric energy quality monitoring system and operating method thereof Download PDFInfo
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- CN105301418A CN105301418A CN201510875818.2A CN201510875818A CN105301418A CN 105301418 A CN105301418 A CN 105301418A CN 201510875818 A CN201510875818 A CN 201510875818A CN 105301418 A CN105301418 A CN 105301418A
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Abstract
The invention provides an electric energy quality monitoring system and an operating method thereof. The invention relates to an electric energy quality monitoring system and an operating method thereof. The electric energy quality monitoring system and the operating method thereof can accurately and comprehensively monitor the electric energy quality in real time. The electric energy quality monitoring system comprises a communication forwarding module, a real time monitoring management system and a plurality of monitoring modules, wherein the monitoring modules send the parameter information to the real time monitoring management system through the communication forwarding module; each monitoring module comprises mutual inductors, an analog/digital signal converter and a DSP module; the mutual inductors, the analog/digital signal converter and the DSP module are connected successively; a phase-locked loop is arranged between the mutual inductors and the analog/digital signal converter; the mutual inductors are a voltage transformer and a current transformer; and the communication forwarding module comprises a wired transmission module and a wireless transmission module. The electric energy quality monitoring system and the operating method thereof can accurately and comprehensively monitor the relevant data of the electric energy quality of a distribution network in real time, and can further improve the electric energy quality, and enhance the power grid management to provide basic data, and optimize the power grid structure and the electric energy quality.
Description
Technical field
The present invention relates to the special monitoring system of a kind of power distribution network and method of work thereof, particularly relate to a kind of electric energy quality monitoring system and method for work thereof.
Background technology
Along with fast development that is scientific and technical and national economy, the power quality problem that a large amount of all kinds of imbalance, non-linear electrical equipment cause causes the extensive concern of people, and the quality of the quality of power supply of distribution directly affects the supply safely and reliably of the electric power of huge numbers of families.By realizing monitoring to the quality of power supply of distribution, Real-Time Monitoring and control are carried out to its power quality problem, for the whole network quality of power supply supervision and improve all there is important practical value.
The power quality problem of the following aspects is mainly there is: frequency departure, voltage deviation, imbalance of three-phase voltage, harmonic wave, voltage fluctuation and flicker etc. in distribution.Current power distribution network there is no real-time on-line monitoring system, to the monitoring of distribution network electric energy quality, has mainly pinpointed the problems, occur having complained, go test to solve again, Power quality management is in passive position all the time, cannot adapts to the demand for development of first-class intelligent distribution network.
State Intellectual Property Office 2014-06-11 discloses a kind of Electric Power Quality On-line Monitor System (application number: 2012105126115, applying date 2012-11-30) and comprises Surveillance center and multiple monitoring station; Described each monitoring station comprises power quality parameter collecting unit, for the storage unit of store electrical energy quality national standard index; Signal processing unit, A/D converting unit, connect A/D converting unit, for judge according to the quality of power supply national standard index of the power quality parameter digital signal transmitted and storage the quality of power supply whether have problems and simultaneously by power quality parameter and result of determination Real-time Feedback to the control module of Surveillance center; Described Surveillance center is connected by radio communication with multiple monitoring station; Described Surveillance center connects user by Internet, and user utilizes Internet can the quality of power supply in long-range acquisition a certain moment.But the precision of power quality parameter collecting unit is not high, and the information gathered is inaccurate, and can not accomplish unmanned.
Summary of the invention
The present invention is directed to above problem, provide a kind of can in real time, accurately, the comprehensively electric energy quality monitoring system of the monitoring quality of power supply and method of work thereof.
Technical scheme of the present invention is: comprise communication forwarding module, real-time monitoring and management system and some monitoring modulars, parameter information is sent to real-time monitoring and management system by communication forwarding module by described monitoring modular, it is characterized in that, described monitoring modular comprises voltage transformer (VT), current transformer, modulus signal converter and DSP module;
Described voltage transformer (VT), current transformer are connected with modulus signal converter respectively;
Described modulus signal converter is connected with described DSP module;
Described voltage transformer (VT) is connected phaselocked loop respectively with current transformer.
Described communication forwarding module comprises wired transport module and wireless transport module.
Described real-time monitoring and management system comprises monitoring terminal, communication system, monitoring main website and web access end;
Described monitoring terminal is connected respectively with described DSP module, communication system;
Described communication system, monitoring main website are connected successively with web access end.
Described monitoring main website comprises data server and database, and described data server is connected with database;
Described web access end is connected with described data server by Web server.
Described electric energy quality monitoring system also comprises warning system, and described warning system is located on electrical network, comprises emergency power-off device and power alarm device;
Described warning system is connected with described monitoring main website.
Work as follows:
1) parameter information of voltage transformer (VT) summation current transformer detection of grid, sends to modulus signal converter by parameter information;
2) the continually varying electrical network parameter information that mutual inductor detects by modulus signal converter converts digital signal to and sends DSP module to;
3) DSP module calculates multiple parameters of electric power according to the digital signal transmitted, and judges the health status of electrical network according to the parameters of electric power calculated;
4) various parameters of electric power information is sent to real-time monitoring and management system by communication forwarding module by DSP module;
5) real-time monitoring and management system is by various parameters of electric power information integration, classification, storage, is supplied to staff and long-distance user checks, complete.
In the present invention, monitoring modular and communication forwarding module complement each other, associating real-time monitoring and management system forms organic whole, the electric energy quality monitoring microsystem become under applicable distribution condition monitors distribution network electric energy quality relevant data in real time, accurately, comprehensively, the quality of power supply can be improved further, reinforcement administration of power networks provides basic data, optimize electric network composition and the quality of power supply.Adopt real-time monitoring and management system collection and show the data of all monitoring points, the whole power quality indexs that can monitor, provide browsing the whole network power quality data, statistics, analysis and integration, for Operation of Electric Systems, supervision, administrative authority and other relevant units provide user access function.In monitoring modular, be provided with phaselocked loop, improve accuracy of data acquisition.Set up wireless transport module in the present invention, can standby transport be used as when wire transmission fault, ensure that the normal table of system runs.Also be provided with warning system, can promptly disconnect electrical network when electrical network parameter is abnormal and notify staff, staff can be found and solve fault the very first time, ensured the safe and stable operation of electrical network.Meanwhile, some household electrical appliance can be subject to the impact of electrical network parameter exception, reduction of service life, understand the security incidents such as initiation fire time serious.Timely disconnection electrical network contributes to extending electrical equipment serviceable life, reduces the incidence of the security incidents such as fire.
Accompanying drawing explanation
Fig. 1 is monitoring modular schematic diagram,
Fig. 2 is total software functional block diagram of monitoring modular,
Fig. 3 is communication forwarding module structure as figure,
Fig. 4 is electric energy quality monitoring system network structure,
Fig. 5 is system software structure figure.
Embodiment
The present invention as Figure 1-5, comprise communication forwarding module, real-time monitoring and management system and some monitoring modulars, parameter information is sent to real-time monitoring and management system by communication forwarding module by described monitoring modular, and described monitoring modular comprises voltage transformer (VT), current transformer, modulus signal converter and DSP module.Voltage transformer (VT), current transformer respectively with modulus signal converter (ADC), be connected, modulus signal converter (ADC) is connected with DSP module.Voltage transformer (VT) summation current transformer is referred to as mutual inductor.Monitoring modular carries out the continuous sampling of free of discontinuities and calculating to monitoring, to the calculating and the judgement that record correlation parameter and carry out the initial stage.
Total software functional block diagram of monitoring modular as shown in Figure 2.After powering at every turn, the first link such as initialize communications, display.Each major cycle of system all completes calculating, the storage of the variablees such as primary voltage, electric current, power, degree of unbalancedness, harmonic wave, flickering.Three-phase voltage and electric current u
a, i
a, u
b, i
b, u
c, i
cbecoming through voltage transformer (VT) (PT) summation current transformer (CT) send as analog electrical signal, after 6 tunnels modulus signal converter (ADC) are transformed to 6 railway digital signals, 6 railway digital signals are delivered to DSP module, DSP module calculates multiple parameters of electric power according to 6 tunnel sampled datas.Be provided with phaselocked loop (PLL) between mutual inductor and modulus signal converter, phaselocked loop is mainly used to improve signal synchronization accuracy.
Communication forwarding module is once gone forward side by side with monitoring modular communication every some cycles the reading process of line correlation data.Communication forwarding module and the direct communication of monitoring modular can wired or wireless modes.Wiredly to be connected with monitoring modular by RS485 interface or RS232 interface, to carry out data interaction.Wireless mode can carry out data interaction by modes such as WIFI with monitoring modular.Power quality data forwarding module, after receiving the measurement raw data that electric energy quality monitoring module uploads, is added up quality of power supply related data, analyzes, out-of-limit judgement, event reading etc.And the result generated is stored on the spot, both can call on the spot for user and check, also can send on last layer main website real-time monitoring and management system.Check for long-distance user.The communication interface of communication forwarding module and upper strata monitoring system, adopts the mode of Ethernet.Adopt wired and wireless two kinds of modes to transmit, ensure that the fast and stable that data are transmitted, when set of system fault, can ensure that system is normally run wherein equally.
Real-time monitoring and management system comprises monitoring terminal, communication system, monitoring main website and web access end.Monitoring terminal is connected respectively with described DSP module, communication system, receives the data transmitted.Communication system, monitoring main website are connected successively with web access end, and monitoring main website comprises data server and database, and described data server is connected with database.Data server can send to database the data stored in data or reading database.Described web access end is connected with described data server by Web server.Long-distance user is facilitated to check relevant information.The major function of Real-Time Monitoring management system is the data gathering and show all monitoring points, whole power quality indexs that management system for monitoring can be monitored, provide browsing the whole network power quality data, statistics, analysis and integration, for Operation of Electric Systems, supervision, administrative authority and other relevant units provide user access function.
The present invention also comprises warning system.Warning system is located on electrical network, comprises emergency power-off device and power alarm device, is connected with described monitoring main website.Accept the control of monitoring main website, can realize promptly disconnecting electrical network when electrical network parameter is abnormal, ensure the safety and stability of electrical network, increase the service life.While disconnection electrical network, warning system sends power-off alarm to monitoring main website, has ensured that the staff in monitoring main website finds in the very first time and solves fault, has recovered operation of power networks.
A method of work for electric energy quality monitoring system, works as follows:
1) parameter information of mutual inductor detection of grid, sends to modulus signal converter by parameter information;
2) the continually varying electrical network parameter information that mutual inductor detects by modulus signal converter converts digital signal to and sends DSP module to;
3) DSP module calculates multiple parameters of electric power according to the digital signal transmitted, and judges the health status of electrical network according to the parameters of electric power calculated;
4) various parameters of electric power information is sent to real-time monitoring and management system by communication forwarding module by DSP module;
5) real-time monitoring and management system is by various parameters of electric power information integration, classification, storage, is supplied to long-distance user and staff checks, complete.
Electric energy quality monitoring module and quality of power supply communication forwarding module complement each other, associating real-time monitoring and management system forms organic whole, the electric energy quality monitoring microsystem become under applicable distribution condition monitors distribution network electric energy quality relevant data in real time, accurately, comprehensively, the quality of power supply can be improved further, reinforcement administration of power networks provides basic data, optimize electric network composition and the quality of power supply.Whole system can intelligent operate, without the need to human attendance, can be comprehensive, and unremitting electrical network to be monitored, can Timeliness coverage fault, change and be in this situation of passive position all the time on Power quality management, improve the service quality of network system.
Claims (6)
1. an electric energy quality monitoring system, comprise communication forwarding module, real-time monitoring and management system and some monitoring modulars, parameter information is sent to real-time monitoring and management system by communication forwarding module by described monitoring modular, it is characterized in that, described monitoring modular comprises voltage transformer (VT), current transformer, modulus signal converter and DSP module;
Described voltage transformer (VT), current transformer are connected with modulus signal converter respectively;
Described modulus signal converter is connected with described DSP module;
Described voltage transformer (VT) is connected phaselocked loop respectively with current transformer.
2. a kind of electric energy quality monitoring system according to claim 1, is characterized in that, described communication forwarding module comprises wired transport module and wireless transport module.
3. a kind of electric energy quality monitoring system according to claim 1, is characterized in that, described real-time monitoring and management system comprises monitoring terminal, communication system, monitoring main website and web access end;
Described monitoring terminal is connected respectively with described DSP module, communication system;
Described communication system, monitoring main website are connected successively with web access end.
4. a kind of electric energy quality monitoring system according to claim 3, is characterized in that, described monitoring main website comprises data server and database, and described data server is connected with database;
Described web access end is connected with described data server by Web server.
5. a kind of electric energy quality monitoring system according to claim 4, is characterized in that, described electric energy quality monitoring system also comprises warning system, and described warning system is located on electrical network, comprises emergency power-off device and power alarm device;
Described warning system is connected with described monitoring main website.
6. a method of work for electric energy quality monitoring system as claimed in claim 1, is characterized in that,
Work as follows:
1) parameter information of voltage transformer (VT) summation current transformer detection of grid, sends to modulus signal converter by parameter information;
2) the continually varying electrical network parameter information that mutual inductor detects by modulus signal converter converts digital signal to and sends DSP module to;
3) DSP module calculates multiple parameters of electric power according to the digital signal transmitted, and judges the health status of electrical network according to the parameters of electric power calculated;
4) various parameters of electric power information is sent to real-time monitoring and management system by communication forwarding module by DSP module;
5) real-time monitoring and management system is by various parameters of electric power information integration, classification, storage, is supplied to staff and long-distance user checks, complete.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112269814A (en) * | 2020-10-27 | 2021-01-26 | 国网河北省电力有限公司雄安新区供电公司 | Real-time abnormal data feedback system for power operation system |
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| US20020042683A1 (en) * | 2000-09-25 | 2002-04-11 | Shincovich John T. | Point of use digital electric energy apparatus with real-time dual channel metering |
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Application publication date: 20160203 |