CN112467751A - Emergency control system for safety and stability of electric power system - Google Patents
Emergency control system for safety and stability of electric power system Download PDFInfo
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- CN112467751A CN112467751A CN202011240489.1A CN202011240489A CN112467751A CN 112467751 A CN112467751 A CN 112467751A CN 202011240489 A CN202011240489 A CN 202011240489A CN 112467751 A CN112467751 A CN 112467751A
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- 238000004891 communication Methods 0.000 claims abstract description 35
- 239000003381 stabilizer Substances 0.000 claims abstract description 32
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 11
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 238000011217 control strategy Methods 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 18
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/58—The condition being electrical
- H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention discloses a safety and stability emergency control system of an electric power system, which is characterized in that a distributed electric power information acquisition module is arranged for monitoring state information and control data of each electric power device, an electric power analysis module is arranged for checking and analyzing the data sent by an electric power communication module, when the data are abnormal, a control command is sent to a voltage stabilizing device through the electric power communication module, when the input current exceeds the current overload value, a voltage stabilizer is controlled to enter a timed overload protection mode, namely, overload delay is set to reduce the load, and when the overload protection mode is started to exceed the timing, the input current still exceeds the set current value, the load of any electric power device is cut off, so that an online safety and stability emergency control strategy can be realized according to the real-time running state of the electric power system.
Description
Technical Field
The invention relates to the technical field of power control systems, in particular to a safety and stability emergency control system for a power system.
Background
With the development of long-distance high-voltage transmission technology, the power grid in China has gradually developed into a large-scale interconnected power system. However, the interconnected power systems are prone to chain reaction when encountering various accidents, thereby causing large-area power failure. As the second three defense lines for guaranteeing the stability and the safety of the power grid and the important means for improving the transmission capacity of the power grid, the power grid emergency control system plays an important role in the aspects of improving the transmission capacity of the power grid, avoiding power nesting, guaranteeing the stability of the system, preventing the expansion of accidents and the like, and obtains good economic and social benefits.
Safety and stability emergency control devices (hereinafter referred to as "stability control devices") have been widely used in power systems, and after a power element fails, the safety and stability emergency control devices quickly identify the failure and quickly match a preset emergency control strategy according to the failed element, the failure type and the current operation mode. With the expansion of the scale of the power system and the variable operation modes, the emergency control strategy established through offline analysis is difficult to realize optimal control, even difficult to ensure the safety and stability of the power system, and an online safe and stable emergency control strategy according to the real-time operation state of the power system is urgently needed.
Disclosure of Invention
The invention aims to solve the problems and provides a safety and stability emergency control system for an electric power system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a safety and stability emergency control system for a power system comprises the following components:
the distributed power information acquisition modules are connected in a wired mode and used for monitoring state information and control data of each power device;
the power communication module is used for realizing the mutual connection of power equipment, the connection between the power equipment and the distributed power information acquisition module, the connection between the distributed power information acquisition module and the power analysis module, the connection between the power analysis module and the power control module and the sending or receiving of data of the power information acquisition module through medium-short distance wireless communication;
the at least one storage module is used for storing data in a hard disk arraying mode and storing historical data of the power information acquisition module for at least one month;
at least one power analysis module for transmitting a control command to the voltage stabilization device through the power communication module when the data is abnormal by checking and analyzing the data transmitted by the power communication module;
and the at least one power control module receives the control command sent by the power analysis module through the power communication module, outputs the control parameters to the corresponding voltage stabilizing equipment through the power communication module, and outputs the control parameters to cut off any power equipment through the power communication module.
Optionally, the control command is that the power analysis module feeds back to the generation and execution of the emergency control strategy of the power control module through the power communication module after the power equipment is abnormal.
Optionally, the emergency control policy is a preset current overload value and overload duration, the power information obtaining module detects that the current of the power device exceeds the preset current overload value, and the overload duration of the power device exceeds the preset current overload duration, and performs emergency control on the voltage stabilizing device outputting the control parameter to the power communication module.
Optionally, the voltage stabilizing device is a voltage stabilizer, and when the input current exceeds the current overload value, the voltage stabilizer is controlled to enter a timed overload protection mode, that is, an overload delay is set to reduce the load, and when the overload protection mode is started to exceed the time, the input current still exceeds the set current value, the load of any power device is cut off; and when the overload protection mode is in a timing state and the input current is lower than the set current value, the overload protection mode is used for eliminating overload delay.
Optionally, in the overload protection mode, a main control module and a distributed temperature detection circuit are further provided, the number of the distributed temperature detection circuits corresponds to that of the voltage regulators, temperature sensors are arranged in the distributed temperature detection circuits, the temperature sensors detect the temperatures of the voltage regulators, calculate the average temperature of the last 3 seconds time period from the detected temperatures, feed back the average temperature output level value of the time period to the main control module, and the main control module judges whether the temperatures of the voltage regulators are normal according to the average temperature value detected by the distributed temperature detection circuits and continues to maintain the overload protection mode of the voltage regulators if the temperatures are abnormal.
Optionally, the main control module presets a first threshold and a second threshold of the temperature of the voltage stabilizer, the second threshold is greater than the first threshold and greater than the normal operating temperature of the voltage stabilizer, and when the distributed temperature detection circuit monitors that the temperature of the voltage stabilizer is higher than the first threshold and less than the second threshold, the overload protection mode of the voltage stabilizer is continuously maintained; and when the temperature of the voltage stabilizer monitored by the distributed temperature detection circuit is higher than a second threshold value, the load of any power equipment is cut off.
The invention has the following advantages:
the invention is used for monitoring the state information and control data of each power device by arranging a distributed power information acquisition module, and by arranging a power analysis module, the invention checks and analyzes the data sent by a power communication module, sends a control command to a voltage stabilizing device by the power communication module when the data is abnormal, controls a voltage stabilizer to enter a timed overload protection mode when the input current exceeds a current overload value, namely, setting overload delay to reduce load, and cuts off the load of any power device when the overload protection mode is started and exceeds the set time and the input current still exceeds the set current value, thereby being capable of safely and stably controlling an emergency strategy on line according to the real-time running state of a power system.
Drawings
Fig. 1 is a schematic diagram of a safety and stability emergency control system of an electrical power system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a safety and stability emergency control system for an electric power system includes:
in the implementation, a distributed power information acquisition module is adopted, each distributed power information acquisition module is connected in a wired manner and is used for monitoring state information and control data of each power device, and the distributed power information acquisition module can acquire information of current, voltage, frequency and the like of the power devices.
In the implementation, a power communication module is adopted, and the power communication module realizes that power devices communicate with each other, the power devices and the distributed power information acquisition module, the distributed power information acquisition module and the power analysis module, the power analysis module and the power control module through medium-short distance wireless communication, and is used for sending and receiving data of the power information acquisition module. The power communication module can be used for GPRS communication and WIFI communication.
In this embodiment, a storage module is used to store data by forming an array of hard disks, and in this embodiment, historical data of the power information acquisition module is saved for one month.
In the present embodiment, a power analysis module is used, and by checking and analyzing data transmitted from the power communication module, a control command is transmitted to the voltage stabilizing device through the power communication module when the data is abnormal.
In the implementation, a power control module is adopted, a power communication module is used for receiving a control command sent by a power analysis module, a power communication module is used for outputting control parameters to corresponding voltage stabilizing equipment, and a power communication module is used for outputting the control parameters to cut off any power equipment.
The control command is generated and executed by the emergency control strategy fed back to the power control module by the power communication module after the power equipment is abnormal by the power analysis module. The emergency control strategy is a preset current overload value and overload duration, the power information acquisition module detects that the current of the power equipment exceeds the preset current overload value, and the overload duration of the power equipment exceeds the preset current overload duration, and the power communication module outputs control parameters to the corresponding voltage stabilizing equipment to implement emergency control.
The voltage stabilizing device is a voltage stabilizer, when the input current exceeds a current overload value, the voltage stabilizer is controlled to enter a timed overload protection mode, namely, an overload delay is set to reduce the load, and when the overload protection mode is started to exceed the timed value, the input current still exceeds a set current value, the load of any power equipment is cut off; and when the overload protection mode is in a timing state and the input current is lower than the set current value, the overload protection mode is used for eliminating overload delay.
In the overload protection mode, a main control module and distributed temperature detection circuits are further arranged, the number of the distributed temperature detection circuits corresponds to that of the voltage stabilizers, temperature sensors are arranged in the distributed temperature detection circuits and used for detecting the temperature of the voltage stabilizers, calculating the average temperature of the detected temperature within the past 3 second time period, and feeding the average temperature output level value of the time period back to the main control module, and the main control module judges whether the temperature of the voltage stabilizers is normal according to the average temperature value detected by the distributed temperature detection circuits and continues to maintain the overload protection mode of the voltage stabilizers if the temperature of the voltage stabilizers is not normal.
The method comprises the steps that a main control module presets a first threshold and a second threshold of the temperature of a voltage stabilizer (in the embodiment, the temperature of the voltage stabilizer refers to the temperature of a coil of the voltage stabilizer), and the second threshold is larger than the first threshold and larger than the normal operation temperature of the voltage stabilizer, in the embodiment, the first threshold is 80 ℃ and the second threshold is 95 ℃, so that the temperature is guaranteed to be lower than 100 ℃, the coil of the voltage stabilizer is prevented from being overhigh, and when a distributed temperature detection circuit monitors that the temperature of the voltage stabilizer is higher than the first threshold (80 ℃) and smaller than the second threshold (95 ℃), an overload protection mode of the voltage stabilizer is continuously kept; when the temperature of the voltage stabilizer is monitored by the distributed temperature detection circuit to be higher than a second threshold value (95 ℃), the load of any power equipment is cut off.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention. In the present invention, unless otherwise explicitly specified or limited, the terms "connected", "distributed", and the like are to be understood broadly, and for example, may be mechanically connected or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (6)
1. A safety and stability emergency control system for an electric power system is characterized by comprising the following components:
the distributed power information acquisition modules are connected in a wired mode and used for monitoring state information and control data of each power device;
the power communication module is used for realizing the mutual connection of power equipment, the connection between the power equipment and the distributed power information acquisition module, the connection between the distributed power information acquisition module and the power analysis module, the connection between the power analysis module and the power control module and the sending and receiving of data of the power information acquisition module through medium-short distance wireless communication;
the at least one storage module is used for storing data in a hard disk arraying mode and storing historical data of the power information acquisition module for at least one month;
at least one power analysis module for transmitting a control command to the voltage stabilization device through the power communication module when the data is abnormal by checking and analyzing the data transmitted by the power communication module;
and the at least one power control module receives the control command sent by the power analysis module through the power communication module, outputs the control parameters to the corresponding voltage stabilizing equipment through the power communication module, and outputs the control parameters to cut off any power equipment through the power communication module.
2. The emergency control system according to claim 1, wherein the control command is fed back to the generation and execution of the emergency control strategy of the power control module through the power communication module after the power equipment is abnormal by the power analysis module.
3. The electrical power system safety and stability emergency control system according to claim 2, wherein the emergency control strategy is a preset current overload value and an overload duration, the electrical power information obtaining module detects that the current of the electrical power equipment exceeds the preset current overload value, and the overload duration of the electrical power equipment exceeds the preset current overload duration, and the emergency control is performed on the electrical power communication module to output the control parameter to the corresponding voltage stabilizing device.
4. The emergency control system according to claim 3, wherein the voltage stabilizer is a voltage stabilizer, and when the input current exceeds the current overload value, the voltage stabilizer is controlled to enter a timed overload protection mode, that is, an overload delay is set to reduce the load, and when the overload protection mode is started to exceed the timed overload, the input current still exceeds the set current value, the load of any power equipment is cut off; and when the overload protection mode is in a timing state and the input current is lower than the set current value, the overload protection mode is used for eliminating overload delay.
5. The power system safety and stability emergency control system according to claim 4, wherein: in foretell overload protection mode, still set up host system and distributed temperature detection circuit, distributed temperature detection circuit quantity corresponds with the stabiliser, be provided with temperature sensor in the distributed temperature detection circuit, temperature sensor detects the stabiliser temperature and will detect the average temperature of temperature calculation in the past 3 seconds time quantum to average temperature output level value with this time quantum feeds back to host system, host system judges whether the stabiliser temperature is normal according to the temperature average value that distributed temperature detection circuit detected, if abnormal continuation keeps the overload protection mode of stabiliser.
6. The emergency control system according to claim 5, wherein the main control module presets a first threshold and a second threshold of the temperature of the voltage regulator, and the second threshold is greater than the first threshold and greater than the normal operating temperature of the voltage regulator, and when the distributed temperature detection circuit monitors that the temperature of the voltage regulator is higher than the first threshold and less than the second threshold, the overload protection mode of the voltage regulator is continuously maintained; and when the temperature of the voltage stabilizer monitored by the distributed temperature detection circuit is higher than a second threshold value, the load of any power equipment is cut off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011240489.1A CN112467751A (en) | 2020-11-09 | 2020-11-09 | Emergency control system for safety and stability of electric power system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011240489.1A CN112467751A (en) | 2020-11-09 | 2020-11-09 | Emergency control system for safety and stability of electric power system |
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| CN202011240489.1A Pending CN112467751A (en) | 2020-11-09 | 2020-11-09 | Emergency control system for safety and stability of electric power system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156236A (en) * | 2021-03-18 | 2021-07-23 | 广西电网有限责任公司 | Method and system for judging line overload of stability control device based on temperature change |
| CN114755479A (en) * | 2022-04-06 | 2022-07-15 | 南栖仙策(南京)科技有限公司 | Power grid regulation and control method and device |
| CN115102294A (en) * | 2022-08-26 | 2022-09-23 | 华能太原东山燃机热电有限责任公司 | Electric power monitoring method and monitoring system |
| CN117152925A (en) * | 2023-10-27 | 2023-12-01 | 吉林省吉能电力通信有限公司 | Big data-based power communication data processing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156236A (en) * | 2021-03-18 | 2021-07-23 | 广西电网有限责任公司 | Method and system for judging line overload of stability control device based on temperature change |
| CN114755479A (en) * | 2022-04-06 | 2022-07-15 | 南栖仙策(南京)科技有限公司 | Power grid regulation and control method and device |
| CN115102294A (en) * | 2022-08-26 | 2022-09-23 | 华能太原东山燃机热电有限责任公司 | Electric power monitoring method and monitoring system |
| CN117152925A (en) * | 2023-10-27 | 2023-12-01 | 吉林省吉能电力通信有限公司 | Big data-based power communication data processing system |
| CN117152925B (en) * | 2023-10-27 | 2024-01-16 | 吉林省吉能电力通信有限公司 | Big data-based power communication data processing system |
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Application publication date: 20210309 |