CN104931836A - Power grid monitoring and early warning system - Google Patents
Power grid monitoring and early warning system Download PDFInfo
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- CN104931836A CN104931836A CN201510371100.XA CN201510371100A CN104931836A CN 104931836 A CN104931836 A CN 104931836A CN 201510371100 A CN201510371100 A CN 201510371100A CN 104931836 A CN104931836 A CN 104931836A
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Abstract
The invention discloses a power grid monitoring and early warning system. The system includes a CPU, a system protection controller, a power grid information collection module, a current and voltage detection module, an alarming system, a remote network controller, and a terminal. The system protection controller is connected to the CPU. The power grid information collection module and the current and voltage detection module are connected to the CPU. The signal output end of the CPU is connected to the alarming system. The communication end of the CPU is connected to the remote network controller. The remote network controller is equipped with a data sharing module in a mating manner. For state monitoring of an electric power system, faults of a power grid and predictions of power failure hidden trouble accidents, the power grid monitoring and early warning system is established through a remote monitoring technology, power grid fault mode identification, a high-speed system diagnosis technology and a network-disconnection detection and evaluation system to dynamically monitor, predict and evaluate the power grid in real time according to instant state changes of the electric power system. Moreover, information high-speed transmission, decision, alarming and system protection operations are carried out by utilizing a power grid early warning system and a high-speed network communication technology.
Description
Technical field
The present invention relates to grid monitoring techniques field, particularly relate to a kind of power system monitor and early warning system.
Background technology
Along with modern power electronic industrial expansion, rolling up and the long-term overload operation of electric system of the non-linear electric load of Large Copacity, the impact of electric system and the accident of initiation thereof are received day by day to the concern of people, mains by harmonics not only can to relay protection, communication facilities, electronic devices etc. produce harmful effect, harmonic pollution also can increase the failure rate of electrical network greatly, reduce the reliability of electrical network, power grid quality is caused and has a strong impact on, for a long time, due to China's electric power wretched insufficiency, electric system is in serious overload operation state all the time, there is various uncertain hidden danger, the U.S. in recent years, European and Russian electric power large-scale blackout is that alarm bell has been beaten in China's electric system, therefore, for electric system momentary status variation prediction, calculate the accident risks of electric system and the possibility of catastrophic failure, operation of power networks state is assessed, report to the police and automatically control, and by information fast transport to operational management person and decision-making level, avoid the generation of hidden failure, or the loss of fault is limited in minimum zone, it is this area urgent problem.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of power system monitor and early warning system, operation of power networks state is evaluated by using CPU to compare operation of power networks parameter and fault model parameter, and comparative result is transferred to Remote Network Controller by communication module, operational management person is monitored operational factor by terminating machine, and report to the police under set condition, can anticipation fault type and faulty line, improve safe operation of electric network and stability.
For solving the problems of the technologies described above; the technical solution used in the present invention is: a kind of power system monitor and early warning system; comprise CPU, system protection controller, electric network information acquisition module, current/voltage detection module, warning system, Remote Network Controller and terminating machine; described system protection controller is connected with CPU; described electric network information acquisition module is connected with CPU with current/voltage detection module; described cpu signal output terminal connects warning system; CPU communication ends connects Remote Network Controller, the supporting setting data sharing module of described Remote Network Controller.
Described CPU comprises power system information processing module, fault model module, information analysis module and communication module, described electric network information acquisition module is connected with power system information processing module with current/voltage detection module signal end, described fault model module is connected with power system information processing module, described power system information processing module signal output part link information analysis module, information analysis module is connected with communication module.
Described current/voltage detection module comprises the A/D conversion chip that isolation mutual inductance testing circuit, Anti-aliasing Filter Circuits and signal are CS5460A, and A/D conversion chip is measured through isolation mutual inductance testing circuit and the pretreated electric current and voltage instantaneous value of Anti-aliasing Filter Circuits, effective value, power and energy value.
The beneficial effect adopting technique scheme to produce is: the present invention is directed to POWER SYSTEM STATE monitoring, the prediction of electric network fault and power failure accident risks, utilize remote control technology, electric network fault pattern-recognition, High Speed System diagnostic techniques and suspension check and evaluation system and arranging power system monitor and early warning system, according to the change of electric system momentary status, real-time dynamic monitoring and forecast assessment are carried out to electrical network, and utilize electrical network early warning system and high-speed network communication technology to carry out high speed information transmission, decision-making, warning and system protection operate, effectively improve operation of power networks stability and security.
Accompanying drawing explanation
Fig. 1 is principle of the invention block diagram;
Fig. 2 is fault model module principle figure of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
In order to solve existing power system monitor, also early warning is not in place, easily because of problem that local fault causes whole electrical network to stop transport, the invention provides a kind of power system monitor and early warning system, comprise CPU, system protection controller, electric network information acquisition module, current/voltage detection module, warning system, Remote Network Controller and terminating machine, described system protection controller is connected with CPU, described electric network information acquisition module is connected with CPU with current/voltage detection module, described cpu signal output terminal connects warning system, CPU communication ends connects Remote Network Controller, the supporting setting data sharing module of described Remote Network Controller, : described CPU comprises power system information processing module, fault model module, information analysis module and communication module, described electric network information acquisition module is connected with power system information processing module with current/voltage detection module signal end, described fault model module is connected with power system information processing module, described power system information processing module signal output part link information analysis module, information analysis module is connected with communication module, described current/voltage detection module comprises the A/D conversion chip that isolation mutual inductance testing circuit, Anti-aliasing Filter Circuits and signal are CS5460A, and A/D conversion chip is measured through isolation mutual inductance testing circuit and the pretreated electric current and voltage instantaneous value of Anti-aliasing Filter Circuits, effective value, power and energy value.
The present invention adopts grid fault analytical method to predict electric network fault, by the collection analysis to network system signal, calculate hidden failure evolution and system holding capacity, the outburst of prediction concealment fault, the decision-making had most is taked to avoid the generation of accident, the basic thought of system failure modelling is: first set up series of faults state model to the various faults of system, the system power voltage detected and electric network state and fault model are compared computing, thus carry out electric power system fault identification and status predication, its principle is as shown in Figure 2.
The fundamental purpose that POWER SYSTEM STATE detects be operation states of electric power system measured, analyze, Evaluation and Prediction, realize scheduled operation and system overhaul provides reference frame for controlling actuating equipment, therefore POWER SYSTEM STATE detects what mainly carry out is that power failure type identification and the system failure develop the assessment measured.
Practical power systems fault mostly is short trouble, it is also maximum to the harm of electric system, and short-circuit between conductors fault accounts for more than 80% of total failare, therefore, the emphasis that electric power system fault differentiates judges short trouble type and trouble spot, and fault model is see accompanying drawing 2.
The present invention is in operational process, electric system three voltage and current signals are through isolation mutual inductance testing circuit, enter special signal after the pre-process circuits such as Anti-aliasing Filter Circuits and detect A/D conversion chip, conversion chip model is CS5460A, its inside comprises two analog to digital converters, can to system voltage current instantaneous value, effective value, power and electric energy are measured, for system queries, timing carries out determination and analysis to operation of power networks state, DSP is utilized to detect line voltage current instantaneous value and fft analysis calculating, thus obtain the various harmonic parameters of electrical network and running state parameter, and the warning implementing malfunction operates with protection, realize electrical network intelligent monitoring and warning function.
In a word; the present invention is directed to the prediction of POWER SYSTEM STATE monitoring, electric network fault and power failure accident risks; utilize remote control technology, electric network fault pattern-recognition, High Speed System diagnostic techniques and suspension check and evaluation system and arranging power system monitor and early warning system; according to the change of electric system momentary status, real-time dynamic monitoring and forecast assessment are carried out to electrical network; and utilize electrical network early warning system and high-speed network communication technology to carry out high speed information transmission, decision-making, warning and system protection to operate, effectively improve operation of power networks stability and security.
Claims (3)
1. a power system monitor and early warning system; it is characterized in that: comprise CPU, system protection controller, electric network information acquisition module, current/voltage detection module, warning system, Remote Network Controller and terminating machine; described system protection controller is connected with CPU; described electric network information acquisition module is connected with CPU with current/voltage detection module; described cpu signal output terminal connects warning system; CPU communication ends connects Remote Network Controller, the supporting setting data sharing module of described Remote Network Controller.
2. power system monitor according to claim 1 and early warning system, it is characterized in that: described CPU comprises power system information processing module, fault model module, information analysis module and communication module, described electric network information acquisition module is connected with power system information processing module with current/voltage detection module signal end, described fault model module is connected with power system information processing module, described power system information processing module signal output part link information analysis module, information analysis module is connected with communication module.
3. power system monitor according to claim 2 and early warning system, it is characterized in that: described current/voltage detection module comprises the A/D conversion chip that isolation mutual inductance testing circuit, Anti-aliasing Filter Circuits and signal are CS5460A, and A/D conversion chip is measured through isolation mutual inductance testing circuit and the pretreated electric current and voltage instantaneous value of Anti-aliasing Filter Circuits, effective value, power and energy value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510371100.XA CN104931836A (en) | 2015-06-30 | 2015-06-30 | Power grid monitoring and early warning system |
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| CN201510371100.XA CN104931836A (en) | 2015-06-30 | 2015-06-30 | Power grid monitoring and early warning system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938164A (en) * | 2016-03-16 | 2016-09-14 | 浙江新能量科技股份有限公司 | Remote intelligent monitoring system and monitoring method for energy operation of transformer substation |
| CN108320126A (en) * | 2016-12-16 | 2018-07-24 | 山东电力调度控制中心 | A kind of grid company province ground county's Integrated management system |
| CN108710099A (en) * | 2018-05-24 | 2018-10-26 | 广州供电局有限公司 | Capacitance type potential transformer monitoring alarm method and system |
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| JPS5587961A (en) * | 1978-12-27 | 1980-07-03 | Tokyo Electric Power Co Inc:The | System for identifying fault point of power transmission line |
| CN1207500A (en) * | 1998-08-26 | 1999-02-10 | 北京英康通用电力技术有限公司 | Method and system for detecting failure in distribution network |
| CN201181322Y (en) * | 2008-02-01 | 2009-01-14 | 厦门安达兴电气有限公司 | Electric network fault remote intelligent monitoring device |
| CN201673233U (en) * | 2010-05-26 | 2010-12-15 | 西安兴汇电力科技有限公司 | Distribution network line fault judger |
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2015
- 2015-06-30 CN CN201510371100.XA patent/CN104931836A/en active Pending
Patent Citations (4)
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| JPS5587961A (en) * | 1978-12-27 | 1980-07-03 | Tokyo Electric Power Co Inc:The | System for identifying fault point of power transmission line |
| CN1207500A (en) * | 1998-08-26 | 1999-02-10 | 北京英康通用电力技术有限公司 | Method and system for detecting failure in distribution network |
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| 李树广: "电网监控与预警系统的研制", 《电网技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938164A (en) * | 2016-03-16 | 2016-09-14 | 浙江新能量科技股份有限公司 | Remote intelligent monitoring system and monitoring method for energy operation of transformer substation |
| CN108320126A (en) * | 2016-12-16 | 2018-07-24 | 山东电力调度控制中心 | A kind of grid company province ground county's Integrated management system |
| CN108710099A (en) * | 2018-05-24 | 2018-10-26 | 广州供电局有限公司 | Capacitance type potential transformer monitoring alarm method and system |
| CN108710099B (en) * | 2018-05-24 | 2021-08-31 | 广东电网有限责任公司广州供电局 | Monitoring and alarming method and system for capacitor voltage transformer |
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