CN101924394A - Substation load stabilizing system and realizing method thereof - Google Patents
Substation load stabilizing system and realizing method thereof Download PDFInfo
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- CN101924394A CN101924394A CN2010102648148A CN201010264814A CN101924394A CN 101924394 A CN101924394 A CN 101924394A CN 2010102648148 A CN2010102648148 A CN 2010102648148A CN 201010264814 A CN201010264814 A CN 201010264814A CN 101924394 A CN101924394 A CN 101924394A
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Abstract
The invention discloses a substation load stabilizing system and a realizing method thereof. The substation load stabilizing system comprises a substation monitoring system and a load stabilizing system, wherein the load stabilizing system also comprises a frequency realizing subsystem, a voltage realizing subsystem, a load realizing subsystem and a power failure and restoration subsystem, wherein the load stabilizing system is connected with the substation monitoring system by a communication network, the subsystems of the load stabilizing system are connected by a computer buffer memory, and the substation monitoring system and the load stabilizing system are assembled into a substation duty room. The substation load stabilizing system can replace the traditional various low-frequency low-voltage load-shedding device, an overload cutoff device and an automatic bus transfer device and a corresponding system thereof, avoids the overlapping development of research staff, shortens a development period, reduces the construction cost of an electric network at the same time, effectively increases the operational reliability of the electric network and ensures the reasonable load distribution of the electric network.
Description
Technical field
The present invention relates to a kind of transformer station load and concentrate stabilizing control system and its implementation, especially relate to a kind of substation load stabilizing system and its implementation, belong to electrical technology field based on soft PLC.
Background technology
At present, State Grid Corporation of China proposes to build strong intelligent grid, and intelligent substation is an important ring of intelligent grid.At the continuous development of intelligent substation, require the senior application function of intelligent substation supervisory control system to enrich constantly and strengthen.Clearly propose in " the intelligent substation Protection Technology standard " of State Grid Corporation of China's issue; prepared auto restart, overload connection are cut function and can be realized at station level; the security control device that need not fast trip is not then had clear and definite its implementation, and the voltage power-less adjusting realizes in station level also.At above-mentioned situation, for realize comprising of full intelligent substation of multiple function at station level, the concentrated stabilizing control system of cutting function as frequency off-load, voltage off-load, prepared auto restart and overload connection provides possibility.
Frequency off-load, voltage off-load system, overload off-load system and prepared auto restart system and power fail recovery system in the electric power system at present all set up separately, become system separately.In fact, full transformer station information all need be gathered by above-mentioned each system, all can obtain in monitoring system of electric substation.Do not appear at present the concentrated stabilizing control system that comprises above-mentioned functions in the intelligent substation.
Summary of the invention
Technical problem to be solved by this invention provides a kind of frequency off-load in the transformer station, voltage off-load, load off-load and power failure realized to be switched and the mode self-recovering function, and intelligent substation systems stabilisation and its implementation of various forms of low frequencies, low pressure off-load, overload off-load, backup auto-activating device or system in the alternative transformer station.
For solving the problems of the technologies described above, the invention provides a kind of substation load stabilizing system, comprise with the lower part:
Monitoring system of electric substation: be used to realize the real-time information collection of transformer station, and the real time information of gathering is passed to substation load stabilizing system, and accept and carry out the circuit breaker breaker tripping and closing order next by the substation load stabilizing system transmission;
Load stabilizing system: comprise following each subsystem
Frequency stabilization subsystem: overfrequency and the UFLS function of finishing transformer station;
Voltage stabistor system: overvoltage and the low pressure Load Alleviation Function of finishing transformer station;
Steady load subsystem: the overload off-load of finishing transformer station;
Power failure and recovery subsystem: full standing posture prepared auto restart and the overload connection thereof of finishing transformer station are cut, and power failure disappearance back operational mode self-recovering function,
It is characterized in that: described load stabilizing system is connected by communication network with monitoring system of electric substation, each subsystem connects by Computer Cache in the described load stabilizing system, and described monitoring system of electric substation and load stabilizing system are installed in transformer station's night shift room.
Aforesaid substation load stabilizing system is characterized in that: described frequency stabilization subsystem, voltage stabistor system, steady load subsystem and power failure and recovery subsystem adopt soft PLC to realize logic online programmable and in-circuit emulation.
Aforesaid substation load stabilizing system is characterized in that: described transformer station comprises intelligent substation and conventional substation.
The implementation method of aforesaid substation load stabilizing system is characterized in that, comprises the following steps:
1) monitoring system of electric substation is gathered the real time information of transformer station, and the real time information that collects is transferred to load stabilizing system;
2) each subsystem of load stabilizing system according to the real-time status of transformer station finish frequency off-load (comprising overfrequency and low frequency), voltage off-load (comprising overvoltage and low pressure), load off-load, power failure switches and mode self-recovering function (comprise prepared auto restart and overload connection cut function);
3) load stabilizing system is given monitoring system of electric substation with circuit breaker breaker tripping and closing command transfer, finish the execution of each subsystem breaker tripping and closing order of load stabilizing system by it, thus finish transformer station frequency off-load (comprising overfrequency and low frequency), voltage off-load (comprising overvoltage and low pressure), load off-load, power failure switches and mode self-recovering function (comprise prepared auto restart and overload connection cut function);
The implementation method of aforesaid substation load stabilizing system, it is characterized in that: realize each the subsystem logic online programming and the in-circuit emulation function of load stabilizing system by soft PLC, finished frequency off-load (comprising overfrequency and low frequency), voltage off-load (comprising overvoltage and low pressure), load off-load in transformer station or the conventional substation, power failure switches and mode self-recovering function (comprise prepared auto restart and overload connection cut function).
The implementation method of aforesaid substation load stabilizing system is characterized in that: described transformer station comprises intelligent substation and conventional substation.
The implementation method of aforesaid substation load stabilizing system is characterized in that: in described step 1), monitoring system of electric substation passes to load stabilizing system in the mode of 104 stipulations with the real time information of gathering by Ethernet.
The implementation method of aforesaid substation load stabilizing system is characterized in that: in described step 3), described load stabilizing system passes to monitoring system of electric substation by Ethernet in the mode of 104 stipulations.
The beneficial effect that the present invention reached: substation load stabilizing system and its implementation based on soft PLC of the present invention realized based on each subsystem logic online programming and in-circuit emulation in the systems stabilisation on the soft PLC basis, realized simultaneously the frequency off-load (comprising overfrequency and low frequency) in intelligent substation or the conventional substation again, voltage off-load (comprising overvoltage and low pressure), the load off-load, power failure switches and mode self-recovering function (comprise prepared auto restart and overload connection cut function), the alternative existing various low-frequency low-voltage load shedding devices that used, overload Union Switch Device and backup auto-activating device and corresponding system thereof, both avoided research staff's overlapping development, shortened the construction cycle, reduced simultaneously the power grid construction cost again, effectively improve the operation of power networks reliability, guaranteed the network load reasonable distribution.
Description of drawings
Fig. 1 is a substation load stabilizing system theory diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing a kind of embodiment of the present invention is described further.
In the present embodiment, the monitoring system of electric substation that adopts based on the substation load stabilizing system of soft PLC is a NSS100 embedded transformer station supervisory control system, soft PLC adopts state's auspicious NSPLC software through pictures in electricity south, is used for finishing the function of each subsystem of intelligent substation load stabilizing system.
Intelligent substation load stabilizing system and its implementation based on soft PLC realized based on each subsystem logic online programming and in-circuit emulation in the systems stabilisation on the soft PLC basis, realized again simultaneously in intelligent substation or the conventional substation rate off-load (comprising overfrequency and low frequency), voltage off-load (comprising overvoltage and low pressure), load off-load, power failure switches and mode self-recovering function (comprise prepared auto restart and overload connection cut function).
The real time information of the full transformer station of NSS100 embedded transformer station supervisory control system collection, and passing to the intelligent substation load stabilizing system in the mode of 104 stipulations by Ethernet, each subsystem of intelligent substation load stabilizing system is realized transformer station's information sharing by the common data buffer area.
According to the current operational mode of transformer station and frequency, the voltage and current situation of transformer station, in real time transformer station is carried out the centralized control of frequency, voltage and load based on each subsystem of intelligent substation load stabilizing system of soft PLC.After transformer station breaks down or is unusual, NSS100 embedded transformer station supervisory control system is with the transformer station's real time information (busbar voltage that collects, frequency, the current operational mode of line current and electrical network) passes to the intelligent substation load stabilizing system, if current transformer station situation satisfies the entry condition of certain subsystem in the intelligent substation systems stabilisation, then pass through corresponding delay and logic determines, then the intelligent substation systems stabilisation is according to default logic and the current load condition of electrical network, send a series of circuit breaker breaker tripping and closing order, after circuit breaker breaker tripping and closing order passes to NSS100 embedded transformer station supervisory control system, finish the breaker tripping and closing operation of a series of circuit breakers of transformer station, realize certain subsystem corresponding function, guarantee the continued power and the load balancing of network load.
The present invention is illustrated according to an exemplary embodiments; be to be understood that; the foregoing description does not limit the present invention in any form; all employings based on the form of soft PLC technology concentrate frequency off-load (comprising overfrequency and low frequency), voltage off-load (comprising overvoltage and low pressure), the load off-load of realizing transformer station's (comprising intelligent substation and conventional substation), power failure switches and mode self-recovering function (comprise prepared auto restart and overload connection cut function), all drop within the protection range of patent of the present invention.
Claims (8)
1. substation load stabilizing system comprises with the lower part:
Monitoring system of electric substation: be used to realize the real-time information collection of transformer station, and the real time information of gathering is passed to substation load stabilizing system, and accept and carry out the circuit breaker breaker tripping and closing order next by the substation load stabilizing system transmission;
Load stabilizing system: comprise following each subsystem
Frequency stabilization subsystem: overfrequency and the UFLS function of finishing transformer station;
Voltage stabistor system: overvoltage and the low pressure Load Alleviation Function of finishing transformer station;
Steady load subsystem: the overload off-load of finishing transformer station;
Power failure and recovery subsystem: full standing posture prepared auto restart and the overload connection thereof of finishing transformer station are cut, and power failure disappearance back operational mode self-recovering function,
It is characterized in that: described load stabilizing system is connected by communication network with monitoring system of electric substation, each subsystem connects by Computer Cache in the described load stabilizing system, and described monitoring system of electric substation and load stabilizing system are installed in transformer station's night shift room.
2. substation load stabilizing system according to claim 1 is characterized in that: described frequency stabilization subsystem, voltage stabistor system, steady load subsystem and power failure and recovery subsystem adopt soft PLC to realize logic online programmable and in-circuit emulation.
3. substation load stabilizing system according to claim 1 and 2 is characterized in that: described transformer station comprises intelligent substation and conventional substation.
4. the implementation method of substation load stabilizing system according to claim 1 is characterized in that, comprises the following steps:
1) monitoring system of electric substation is gathered the real time information of transformer station, and the real time information that collects is transferred to load stabilizing system;
2) each subsystem of load stabilizing system is finished frequency off-load, voltage off-load, load off-load, power failure switching and mode self-recovering function according to the real-time status of transformer station;
3) load stabilizing system is given monitoring system of electric substation with circuit breaker breaker tripping and closing command transfer, finish the execution of each subsystem breaker tripping and closing order of load stabilizing system by it, thereby frequency off-load, voltage off-load, load off-load, the power failure of finishing transformer station switch and the mode self-recovering function.
5. the implementation method of substation load stabilizing system according to claim 4, it is characterized in that:, finish frequency off-load, voltage off-load, load off-load, power failure switching and mode self-recovering function in transformer station or the conventional substation by each subsystem logic online programming and the in-circuit emulation function that soft PLC realizes load stabilizing system.
6. according to the implementation method of claim 4 or 5 described substation load stabilizing systems, it is characterized in that: described transformer station comprises intelligent substation and conventional substation.
7. the implementation method of substation load stabilizing system according to claim 4 is characterized in that: in described step 1), monitoring system of electric substation passes to load stabilizing system in the mode of 104 stipulations with the real time information of gathering by Ethernet.
8. the implementation method of substation load stabilizing system according to claim 7 is characterized in that: in described step 3), described load stabilizing system passes to monitoring system of electric substation by Ethernet in the mode of 104 stipulations.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102648148A CN101924394A (en) | 2010-08-26 | 2010-08-26 | Substation load stabilizing system and realizing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102648148A CN101924394A (en) | 2010-08-26 | 2010-08-26 | Substation load stabilizing system and realizing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830663A (en) * | 2012-04-09 | 2012-12-19 | 常州明成翔锐环保科技有限公司 | Environment monitoring device based on video debugging |
| CN103593507A (en) * | 2013-10-17 | 2014-02-19 | 广东电网公司茂名供电局 | Automatic intelligent central deloading method for power grids |
| WO2014040339A1 (en) * | 2011-10-21 | 2014-03-20 | 广东省电力调度中心 | Intelligent control device for electric power system and implementation method therefor |
| CN103762590A (en) * | 2014-01-13 | 2014-04-30 | 国家电网公司 | On-line setting method for load reduction amount of low-frequency load-reducing basic wheels of electric system |
| CN104993587A (en) * | 2015-06-25 | 2015-10-21 | 国电南瑞科技股份有限公司 | Intelligent transformer station comprehensive monitoring system and realization method thereof |
-
2010
- 2010-08-26 CN CN2010102648148A patent/CN101924394A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014040339A1 (en) * | 2011-10-21 | 2014-03-20 | 广东省电力调度中心 | Intelligent control device for electric power system and implementation method therefor |
| CN102830663A (en) * | 2012-04-09 | 2012-12-19 | 常州明成翔锐环保科技有限公司 | Environment monitoring device based on video debugging |
| CN103593507A (en) * | 2013-10-17 | 2014-02-19 | 广东电网公司茂名供电局 | Automatic intelligent central deloading method for power grids |
| CN103762590A (en) * | 2014-01-13 | 2014-04-30 | 国家电网公司 | On-line setting method for load reduction amount of low-frequency load-reducing basic wheels of electric system |
| CN103762590B (en) * | 2014-01-13 | 2017-06-30 | 国家电网公司 | Power system UFLS takes turns off-load amount on-line tuning method substantially |
| CN104993587A (en) * | 2015-06-25 | 2015-10-21 | 国电南瑞科技股份有限公司 | Intelligent transformer station comprehensive monitoring system and realization method thereof |
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Application publication date: 20101222 |