CN106099936B - Load adjusting method applied to cement factory isolated network power supply system - Google Patents
Load adjusting method applied to cement factory isolated network power supply system Download PDFInfo
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- CN106099936B CN106099936B CN201610437028.0A CN201610437028A CN106099936B CN 106099936 B CN106099936 B CN 106099936B CN 201610437028 A CN201610437028 A CN 201610437028A CN 106099936 B CN106099936 B CN 106099936B
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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
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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
- 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
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Abstract
Present invention is disclosed a kind of load adjusting methods applied to cement factory isolated network power supply system：If power shortage or brownout occur for power grid, four-wheel cutting load is taken to adjust according to this, after round cut Load Regulation, carries out next round cutting load adjusting again if there are still power shortage or brownout；First round cutting load is adjusted：Cut off the 13.5 14.5% of load total amount；Second round cut Load Regulation：Cut off the 12.8 13.5% of load total amount；Third round cutting load is adjusted：Cut off the 12 12.8% of load total amount；Fourth round cutting load is adjusted：Cut off the 10 11% of load total amount.The present invention is according to the electricity consumption particularity of cement factory, it can be achieved that the reliability of supply network, safety, economical.
Description
Technical field
The present invention relates to isolated networks for electrical domain.
Background technology
With the Strategy for economic development paces of national the Belt and Road, China was large-scale ripe in country in Southeast Asia's construction in recent years
Cement producing line is expected, because built cement plant area does not have enough power supplys to supply, using power plant for self-supply's (scale：3 × 18MW) to water
Mud production provides electric power, to meet needs of the manufacture of cement to electric power.Private station is isolated power grid mode, and private station starts
Power supply is provided by diesel-driven generator, but is a lack of a kind of stability that can ensure entire isolated network power supply system, is improved electricity consumption matter
Amount is suitble to the control technology of novel power grid operational mode.
Invention content
Load fluctuation problem caused by numerous switching that the invention solves cement factories because of big load start and stop, and ensure entire
The stability of isolated network power supply system.
To achieve the goals above, the technical solution adopted by the present invention is：Applied to cement factory isolated network power supply system
Load adjusting method：
If power shortage or brownout occur for power grid, four-wheel cutting load is taken to adjust according to this, after round cut Load Regulation,
Carry out next round cutting load adjusting again if there are still power shortage or brownout；
First round cutting load is adjusted：Cut off the 13.5-14.5% of load total amount；
Second round cut Load Regulation：Cut off the 12.8-13.5% of load total amount；
Third round cutting load is adjusted：Cut off the 12-12.8% of load total amount；
Fourth round cutting load is adjusted：Cut off the 10-11% of load total amount.
Power grid occurs power shortage and adjusts the time limit：
First round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.2s；
Second round cut Load Regulation operating frequency/operation time limit：45-50Hz/0.2s
Third round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.3s；
Fourth round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.3s；
Power grid occurs brownout and adjusts the time limit：
First round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un/1.5s；
Second round cut Load Regulation operation voltage/operation time limit：0.5-0.9Un/1.5s
Third round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un/1.5s；
Fourth round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un/1.5s.
If after completing four-wheel Load Regulation, there are still power shortage or brownouts, then carry out the special cutting load tune of two-wheeled
Section；
The first round, special cutting load was adjusted：Cut off the 13.5-14.5% of load total amount；
The second special cutting load of wheel is adjusted：Cut off the 6-7% of load total amount；
Power grid occurs power shortage and adjusts the time limit：
The first round, special cutting load adjusted operating frequency/operation time limit：45-50Hz/15s；
The second special cutting load of wheel adjusts operating frequency/operation time limit：45-50Hz/15s；
Power grid occurs brownout and adjusts the time limit：
The first round, special cutting load adjusted operation voltage/operation time limit：0.5-0.9Un/15s；
The second special cutting load of wheel adjusts operation voltage/operation time limit：0.5-0.9Un/15s.
First round cutting load adjusts excision load：Limestone crushing area equipment, lime stone conveyor zones equipment, water
Mud grinds transformer；
Second round cut Load Regulation cuts off load：Account for the cement grinding mill main motor and its cement of cement factory sum half
Grind exhaust blower；
Third round cutting load adjusts excision load：Account for the other half total cement grinding mill main motor and its water of cement factory
Mud grinds exhaust blower；
Fourth round cutting load adjusts excision load：Clinker warehouse transformer, packet transformer in bulk；
The first round special cutting load adjusts excision load：Raw material grinds main motor, raw material grinds circulating fan；
The second special cutting load of wheel adjusts excision load：Material allocation transformer.
The power shortage is that mains frequency is less than 48.5Hz.
The present invention is according to the electricity consumption particularity of cement factory, it can be achieved that the reliability of supply network, safety, economical.
Specific implementation mode
The characteristics of big load start and stop are often had according to cement factory is asked for load fluctuation caused by solution frequent switching
Topic, ensures the stability of entire isolated network power supply system, and when Power Plant Design considers to be configured with 1 set of electric power load regulating system, reduces
Impact to power grid.
In addition, when private station generating set generated output therein is insufficient or catastrophic failure off-the-line, to ensure
, there is not large-area power-cuts in the stability of entire power grid, considers that a set of load low frequency load shedding equipment is arranged, to full factory's load income
Classification, orderly cutting load is realized according to parameters such as supply voltage, frequencies automatically.
Isolated network Load Regulation control system capacity is the important link of scheme facility, and the size of capacity directly determines that isolated network is transported
Capable success or failure and project investment size.Therefore, how to determine that the pondage of isolated power grid complex control system just seems particularly
It is important.The size of isolated network Load Regulation complex control system pondage is mainly dashed forward by the total capacity of electrical equipment with electrical equipment
Varying capacity two large divisions determines.For the generating set of off-the-line operation, ∑ generating set=∑ stablizes electrical equipment+∑ mutation
Electrical equipment.Ensure that the electricity consumption for being mutated electrical equipment is adjusted in the crucial of generating set stable operation, i.e.,:Isolated network load
Adjust the electricity consumption that complex control system pondage should be slightly bigger than mutation electrical equipment.
For electricity generation system, when load fluctuation is less than 8%, Turbo-generator Set can be born, and will not cause vapour
The action of machine emergency trip system will not cause the special voltage of generating set to change.
Cutting load total value and each round cut load value
Cutting load total value：Power shortage caused by being shut down by a generator failure calculates.
Normal operation system total load：18 × 2=36MW
Power shortage caused by one generator emergency stop valve trip：18MW
Cutting load value is calculated by 18MW, accounts for total load：
Frequency stability when isolated power grid is relatively poor, and the frequency variation of normal operation can use 48.5~50.5Hz, institute
Power shortage has occurred to be believed that when f ＜ 48.5Hz.
If power shortage or brownout occur for power grid, four-wheel cutting load is taken to adjust according to this, after round cut Load Regulation,
Carry out next round cutting load adjusting again if there are still power shortage or brownout；
First round cutting load is adjusted：Cut off the 13.5-14.5% of load total amount；
Second round cut Load Regulation：Cut off the 12.8-13.5% of load total amount；
Third round cutting load is adjusted：Cut off the 12-12.8% of load total amount；
Fourth round cutting load is adjusted：Cut off the 10-11% of load total amount.
Preferred embodiment：
First round cutting load is adjusted：14% i.e. 14% × 36=5.04MW (joins cutting load) containing generator tripping
Second round cut Load Regulation：13% i.e. 13% × 36=4.68MW
Third round cutting load is adjusted：12.5% i.e. 12.5% × 36=4.5MW
Fourth round cutting load is adjusted：10.5% i.e. 10.5% × 36=3.78MW
1st, 2 wheel cutting loads are slightly more, and the validity of low frequency Automatic Load can be improved.
Mains frequency transformation period constant is related with power shortage, net capacity, when 40% that power shortage is total load
When~50%, which is about 1~1.5s.To improve the validity of low frequency automatic load-reducing, respectively
Wheel action delay should not be grown, the operation time limit of the especially the 1st, the 2nd wheel.
Power grid occurs power shortage and adjusts the time limit：
First round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.2s；
Second round cut Load Regulation operating frequency/operation time limit：45-50Hz/0.2s
Third round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.3s；
Fourth round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.3s；
Preferred embodiment：
First round cutting load adjusts operating frequency/operation time limit：48.4Hz/0.2s
First round cutting load adjusts operating frequency/operation time limit：48.1Hz/0.2s
First round cutting load adjusts operating frequency/operation time limit：47.8Hz/0.3s
First round cutting load adjusts operating frequency/operation time limit：47.5Hz/0.3s
Power grid occurs brownout and adjusts the time limit：
First round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un/1.5s；
Second round cut Load Regulation operation voltage/operation time limit：0.5-0.9Un/1.5s
Third round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un/1.5s；
Fourth round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un/1.5s.
Preferred embodiment：
First round cutting load adjusts operation voltage/operation time limit：80%Un/1.5s；
Second round cut Load Regulation operation voltage/operation time limit：76%Un/1.5s；
Third round cutting load adjusts operation voltage/operation time limit：72%Un/1.5s；
Fourth round cutting load adjusts operation voltage/operation time limit：68%Un/1.5s；
Un is to adjust voltage value.
If after completing four-wheel Load Regulation, there are still power shortage or brownouts, then carry out the special cutting load tune of two-wheeled
Section；
The first round, special cutting load was adjusted：Cut off the 13.5-14.5% of load total amount；
The second special cutting load of wheel is adjusted：Cut off the 6-7% of load total amount；
Power grid occurs power shortage and adjusts the time limit：
The first round, special cutting load adjusted operating frequency/operation time limit：45-50Hz/15s；
The second special cutting load of wheel adjusts operating frequency/operation time limit：45-50Hz/15s；
Power grid occurs brownout and adjusts the time limit：
The first round, special cutting load adjusted operation voltage/operation time limit：0.5-0.9Un/15s；
The second special cutting load of wheel adjusts operation voltage/operation time limit：0.5-0.9Un/15s.
For the particularity of cement factory, often wheel excision load needs to cut off different equipment, to make cement factory
Damage minimizes, and by reasonable analysis, excision load sequence is as follows：
First round cutting load adjusts excision load：Limestone crushing area equipment, lime stone conveyor zones equipment, water
Mud grinds transformer；
Second round cut Load Regulation cuts off load：Account for the cement grinding mill main motor and its cement of cement factory sum half
Grind exhaust blower；(cement grinding mill of cement factory of the present invention, if cement grinding mill is odd number, cuts off cement at least provided with two groups
Factory's sum half adds one cement grinding mill main motor and its cement grinding mill exhaust blower)
Third round cutting load adjusts excision load：Account for the cement grinding mill main motor of cement factory total the other half (residue)
And its cement grinding mill exhaust blower；
Fourth round cutting load adjusts excision load：Clinker warehouse transformer, packet transformer in bulk；
The first round special cutting load adjusts excision load：Raw material grinds main motor, raw material grinds circulating fan；
The second special cutting load of wheel adjusts excision load：Material allocation transformer.
Claims (3)
1. the load adjusting method applied to cement factory isolated network power supply system, it is characterised in that：
If power shortage or brownout occur for power grid, four-wheel cutting load is taken to adjust according to this, after round cut Load Regulation, if still
There are power shortage or brownouts then to carry out next round cutting load adjusting again；
First round cutting load is adjusted：Cut off the 13.5-14.5% of load total amount；
Second round cut Load Regulation：Cut off the 12.8-13.5% of load total amount；
Third round cutting load is adjusted：Cut off the 12-12.8% of load total amount；
Fourth round cutting load is adjusted：Cut off the 10-11% of load total amount;
Power grid occurs power shortage and adjusts the time limit：
First round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.2s；
Second round cut Load Regulation operating frequency/operation time limit：45-50Hz/0.2s;
Third round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.3s；
Fourth round cutting load adjusts operating frequency/operation time limit：45-50Hz/0.3s；
Power grid occurs brownout and adjusts the time limit：
First round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un/1.5s；
Second round cut Load Regulation operation voltage/operation time limit：0.5-0.9Un /1.5s
Third round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un /1.5s；
Fourth round cutting load adjusts operation voltage/operation time limit：0.5-0.9Un /1.5s;
If after completing four-wheel Load Regulation, there are still power shortage or brownouts, then carry out the special cutting load of two-wheeled and adjust；
The first round, special cutting load was adjusted：Cut off the 13.5-14.5% of load total amount；
The second special cutting load of wheel is adjusted：Cut off the 6-7% of load total amount；
Power grid occurs power shortage and adjusts the time limit：
The first round, special cutting load adjusted operating frequency/operation time limit：45-50 Hz/15s；
The second special cutting load of wheel adjusts operating frequency/operation time limit：45-50 Hz/15s；
Power grid occurs brownout and adjusts the time limit：
The first round, special cutting load adjusted operation voltage/operation time limit：0.5-0.9Un /15s；
The second special cutting load of wheel adjusts operation voltage/operation time limit：0.5-0.9Un /15s.
2. the load adjusting method according to claim 1 applied to cement factory isolated network power supply system, it is characterised in that：
First round cutting load adjusts excision load：Limestone crushing area equipment, lime stone conveyor zones equipment, cement grinding mill
Transformer；
Second round cut Load Regulation cuts off load：Account for cement grinding mill main motor and its cement grinding mill row of cement factory sum half
Wind turbine；
Third round cutting load adjusts excision load：Account for the other half total cement grinding mill main motor and its cement grinding mill of cement factory
Exhaust blower；
Fourth round cutting load adjusts excision load：Clinker warehouse transformer, packet transformer in bulk；
The first round special cutting load adjusts excision load：Raw material grinds main motor, raw material grinds circulating fan；
The second special cutting load of wheel adjusts excision load：Material allocation transformer.
3. the load adjusting method according to claim 1 applied to cement factory isolated network power supply system, it is characterised in that：
The power shortage is that mains frequency is less than 48.5 Hz.
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| CN201610437028.0A CN106099936B (en) | 2016-06-18 | 2016-06-18 | Load adjusting method applied to cement factory isolated network power supply system |
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| CN201610437028.0A CN106099936B (en) | 2016-06-18 | 2016-06-18 | Load adjusting method applied to cement factory isolated network power supply system |
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| CN106099936B true CN106099936B (en) | 2018-08-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107382109B (en) * | 2017-09-04 | 2022-04-08 | 中材建设有限公司 | Electric energy self-maintaining dry cement sintering process and power supply and distribution system thereof |
| CN107492913A (en) * | 2017-09-21 | 2017-12-19 | 哈尔滨广瀚燃气轮机有限公司 | Isolated network power station PMS power management systems |
| CN109638972B (en) * | 2019-02-01 | 2021-04-30 | 国网江苏省电力有限公司 | Network load interaction control method adaptive to load characteristics, terminal and storage medium |
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| CN103094904A (en) * | 2013-01-04 | 2013-05-08 | 南京南瑞继保电气有限公司 | Low-frequency low-voltage load shedding calculation method |
| CN103532147A (en) * | 2013-10-24 | 2014-01-22 | 国家电网公司 | Stable, real-time and emergent voltage and power angle control method based on response message |
| CN104505840A (en) * | 2014-12-19 | 2015-04-08 | 西安交通大学 | Low-frequency low-voltage combined load shedding method |
| CN104917291A (en) * | 2015-05-05 | 2015-09-16 | 国家电网公司 | Low-frequency and low-voltage load reduction system based on distributed hierarchical control framework |
-
2016
- 2016-06-18 CN CN201610437028.0A patent/CN106099936B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094904A (en) * | 2013-01-04 | 2013-05-08 | 南京南瑞继保电气有限公司 | Low-frequency low-voltage load shedding calculation method |
| CN103532147A (en) * | 2013-10-24 | 2014-01-22 | 国家电网公司 | Stable, real-time and emergent voltage and power angle control method based on response message |
| CN104505840A (en) * | 2014-12-19 | 2015-04-08 | 西安交通大学 | Low-frequency low-voltage combined load shedding method |
| CN104917291A (en) * | 2015-05-05 | 2015-09-16 | 国家电网公司 | Low-frequency and low-voltage load reduction system based on distributed hierarchical control framework |
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Address after: 241000 South Jiuhua Road 1017, Yijiang District, Wuhu City, Anhui Province Patentee after: Anhui Conch Building Materials Design and Research Institute Co., Ltd. Address before: 241000 South Jiuhua Road 1017, Yijiang District, Wuhu City, Anhui Province Patentee before: Anhui Conch Design & Research Institute of Building Materials |
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Effective date of registration: 20190604 Address after: No. 39 Cultural Road, Jinghu District, Wuhu City, Anhui Province, 241000 Co-patentee after: Anhui Conch Building Materials Design and Research Institute Co., Ltd. Patentee after: Anhui Hailuo Group LLC Co-patentee after: anhui conch cement company limited Address before: 241000 South Jiuhua Road 1017, Yijiang District, Wuhu City, Anhui Province Patentee before: Anhui Conch Building Materials Design and Research Institute Co., Ltd. |
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