CN112290563A - AGC logic superposition method for primary frequency modulation and monitoring system - Google Patents
AGC logic superposition method for primary frequency modulation and monitoring system Download PDFInfo
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- CN112290563A CN112290563A CN202010971487.3A CN202010971487A CN112290563A CN 112290563 A CN112290563 A CN 112290563A CN 202010971487 A CN202010971487 A CN 202010971487A CN 112290563 A CN112290563 A CN 112290563A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
- F03B15/06—Regulating, i.e. acting automatically
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention relates to a method for logically superposing a primary frequency modulation and an AGC (automatic gain control) of a monitoring system, which comprises the following steps of: when the frequency difference is generated in the power grid frequency, the speed regulator performs primary frequency modulation action, and controls the opening action of the guide vane of the unit under the opening mode; and (3) transmitting the primary frequency modulation action power value of the speed regulator to a monitoring system through a channel from the speed regulator to the monitoring system, superposing AGC and primary frequency modulation on the monitoring system, and calculating a power difference value with the power feedback of the unit, if the power difference value exists, controlling the guide vane of the speed regulator to give through a pulse, adjusting the opening degree of the guide vane, adjusting the power of the unit until the power and the power feedback difference value after superposition are 0, and finishing the power closed loop of the unit after the adjustment. The invention can effectively realize the effective superposition of the primary frequency modulation action of the speed regulator and the AGC power adjustment of the monitoring system during the primary frequency modulation action in the opening mode of the speed regulating system, thereby improving the primary frequency modulation performance of the hydroelectric generating set, meeting the standard requirement and enhancing the stability of a power grid.
Description
Technical Field
The invention belongs to the technical field of hydroelectric power generation, and particularly relates to a method for AGC (automatic gain control) logic superposition of a primary frequency modulation and monitoring system.
Background
At present, a speed regulating system of a hydroelectric generating set works in an opening degree mode, is in small closed-loop control, a monitoring system is in a power mode, is in large closed-loop control, and requires the superposition response when primary frequency modulation of the speed regulator system of the generating set and AGC of the monitoring system act simultaneously according to specifications; however, in the actual opening mode of the speed regulation system, when the primary frequency modulation and the AGC respond simultaneously, the primary frequency modulation control quantity of the speed regulator is pulled back by the AGC of the monitoring system, so that the final output quantity of the primary frequency modulation is 0, the primary frequency modulation performance of the hydroelectric generating set is influenced, and the stability of a power grid is influenced.
The current matching logic of the speed regulating system and the monitoring system of the hydroelectric generating set is as follows:
1. the primary frequency modulation of the speed regulator is prior, and when the primary frequency modulation acts, the locking monitoring system AGC is used for active adjustment;
2. the monitoring system has priority, and primary frequency modulation is locked when the AGC of the monitoring system acts;
3. and (3) jointly adjusting, wherein when primary frequency modulation and AGC act simultaneously, the speed regulator and the monitoring system jointly adjust, but the primary frequency modulation action quantity is pulled back by the monitoring system AGC under the opening mode of the speed regulator, so that the primary frequency modulation action quantity is 0.
In the prior art, a primary frequency modulation priority or monitoring priority strategy is simply adopted, so that the primary frequency modulation of a speed regulating system and the AGC of a monitoring system cannot be adjusted simultaneously; or the opening mode of the speed regulating system is adjusted and pulled back by the AGC power of the monitoring system by adopting common adjustment, so that the primary frequency modulation adjustment amount is 0, and the superposition response of the primary frequency modulation and the AGC power adjustment of the monitoring system cannot be reasonably realized by adopting several modes.
Disclosure of Invention
The invention aims to provide a method for logically superposing primary frequency modulation and an AGC (automatic gain control) of a monitoring system, aiming at the problem of logical matching of the primary frequency modulation and the AGC power regulation of the monitoring system in the opening mode of the speed regulating system of the existing hydroelectric generating set, a channel is additionally arranged between a speed regulator and the monitoring system, when the speed regulator performs primary frequency modulation action, a primary frequency modulation action electric quantity calculation value is sent to the monitoring system through the channel, an AGC power set value and a primary frequency modulation action value of the speed regulator are superposed on the monitoring system, and the monitoring system completes power closed loop, so that superposition of the primary frequency modulation and the AGC power regulation of the monitoring system in the opening.
The invention provides a method for logically superposing a primary frequency modulation and an AGC (automatic gain control) of a monitoring system, which comprises the following steps of:
when the frequency difference is generated in the power grid frequency, the speed regulator performs primary frequency modulation action, and controls the opening action of the guide vane of the unit under the opening mode;
and (3) transmitting the primary frequency modulation action power value of the speed regulator to a monitoring system through a channel from the speed regulator to the monitoring system, superposing AGC and primary frequency modulation on the monitoring system, and calculating a power difference value with the power feedback of the unit, if the power difference value exists, controlling the guide vane of the speed regulator to give through a pulse, adjusting the opening degree of the guide vane, adjusting the power of the unit until the power and the power feedback difference value after superposition are 0, and finishing the power closed loop of the unit after the adjustment.
By means of the scheme, the method for logically superposing the primary frequency modulation and the AGC of the monitoring system has the following technical effects:
1) the method can effectively realize the effective superposition of the primary frequency modulation action of the speed regulator and the AGC power regulation of the monitoring system during the primary frequency modulation action in the opening mode of the speed regulating system.
2) The problem that primary frequency modulation and AGC can not participate in power grid frequency modulation simultaneously in an opening degree mode is solved.
3) The problem that the examination of the action quantity of the primary frequency modulation cannot be calculated when the primary frequency modulation and AGC simultaneously act in the opening degree mode is solved.
4) The problem that the primary frequency modulation action quantity is 0 due to the fact that the primary frequency modulation action quantity is pulled back by power adjustment of a monitoring system in an opening mode is solved, the matching logic of the primary frequency modulation and AGC of the hydroelectric generating set in the opening mode is optimized, the primary frequency modulation performance of the hydroelectric generating set is improved, the standard requirement is met, and the stability of a power grid is enhanced.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Drawings
Fig. 1 is a flow chart of the method for AGC logic superposition of a primary frequency modulation and monitoring system of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides a method for logically superposing a primary frequency modulation and an AGC of a monitoring system, including:
when the frequency difference is generated in the power grid frequency, the speed regulator performs primary frequency modulation action, and controls the opening action of the guide vane of the unit under the opening mode;
and (3) transmitting the primary frequency modulation action power value of the speed regulator to a monitoring system through a channel from the speed regulator to the monitoring system, superposing AGC and primary frequency modulation on the monitoring system, and calculating a power difference value with the power feedback of the unit, if the power difference value exists, controlling the guide vane of the speed regulator to give through a pulse, adjusting the opening degree of the guide vane, adjusting the power of the unit until the power and the power feedback difference value after superposition are 0, and finishing the power closed loop of the unit after the adjustment.
By the method for logically superposing the primary frequency modulation and the AGC of the monitoring system, when the primary frequency modulation is performed in the opening mode of the speed regulator, the primary frequency modulation operation power value is sent to the monitoring system through the channel, and the monitoring system superposes the primary frequency modulation operation power value to the AGC power set value, so that the effective superposition of the primary frequency modulation operation of the speed regulation system and the AGC power regulation of the monitoring system in the opening mode of the speed regulation system is realized, and the effective superposition of the primary frequency modulation operation of the speed regulator and the AGC power regulation of the monitoring system in the opening mode of the speed regulation; the problem that primary frequency modulation and AGC cannot participate in power grid frequency modulation at the same time in an opening degree mode is solved; the problem that the examination of the action quantity of primary frequency modulation cannot be calculated when the primary frequency modulation and AGC act simultaneously in the opening degree mode is solved; the problem that the primary frequency modulation action quantity is 0 due to the fact that the primary frequency modulation action quantity is pulled back by power adjustment of a monitoring system in an opening mode is solved, the matching logic of the primary frequency modulation and AGC of the hydroelectric generating set in the opening mode is optimized, the primary frequency modulation performance of the hydroelectric generating set is improved, the standard requirement is met, and the stability of a power grid is enhanced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A method for AGC logic superposition of a primary frequency modulation and monitoring system is characterized by comprising the following steps:
when the frequency difference is generated in the power grid frequency, the speed regulator performs primary frequency modulation action, and controls the opening action of the guide vane of the unit under the opening mode;
and (3) transmitting the primary frequency modulation action power value of the speed regulator to a monitoring system through a channel from the speed regulator to the monitoring system, superposing AGC and primary frequency modulation on the monitoring system, and calculating a power difference value with the power feedback of the unit, if the power difference value exists, controlling the guide vane of the speed regulator to give through a pulse, adjusting the opening degree of the guide vane, adjusting the power of the unit until the power and the power feedback difference value after superposition are 0, and finishing the power closed loop of the unit after the adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010971487.3A CN112290563A (en) | 2020-09-16 | 2020-09-16 | AGC logic superposition method for primary frequency modulation and monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010971487.3A CN112290563A (en) | 2020-09-16 | 2020-09-16 | AGC logic superposition method for primary frequency modulation and monitoring system |
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| CN112290563A true CN112290563A (en) | 2021-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188994A (en) * | 2021-11-05 | 2022-03-15 | 华能澜沧江水电股份有限公司 | Adjustment strategy for improving dynamic stability of primary frequency modulation adjustment process |
| CN114204571A (en) * | 2021-11-05 | 2022-03-18 | 华能澜沧江水电股份有限公司 | Primary frequency modulation method for inhibiting repeated adjustment based on adjustment target setting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107061132A (en) * | 2016-12-15 | 2017-08-18 | 贵州北盘江电力股份有限公司董箐发电厂 | A kind of power station speed regulator power closed-loop adjustment improves power adjusting speed and the regulating system of degree of regulation |
| CN110970911A (en) * | 2019-12-13 | 2020-04-07 | 四川省电力工业调整试验所 | Control method for mutual superposition of AGC and primary frequency modulation in opening degree mode |
-
2020
- 2020-09-16 CN CN202010971487.3A patent/CN112290563A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061132A (en) * | 2016-12-15 | 2017-08-18 | 贵州北盘江电力股份有限公司董箐发电厂 | A kind of power station speed regulator power closed-loop adjustment improves power adjusting speed and the regulating system of degree of regulation |
| CN110970911A (en) * | 2019-12-13 | 2020-04-07 | 四川省电力工业调整试验所 | Control method for mutual superposition of AGC and primary frequency modulation in opening degree mode |
Non-Patent Citations (2)
| Title |
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| 卢舟鑫等: "水电机组一次调频与AGC协联控制改造及试验分析", 《水电与抽水蓄能》 * |
| 唐小波: "大型水电机组一次调频特性试验与探讨", 《2019年云、贵、川、湘、桂、粤、青七省（区）水电站运行检修技术交流研讨会论文集》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188994A (en) * | 2021-11-05 | 2022-03-15 | 华能澜沧江水电股份有限公司 | Adjustment strategy for improving dynamic stability of primary frequency modulation adjustment process |
| CN114204571A (en) * | 2021-11-05 | 2022-03-18 | 华能澜沧江水电股份有限公司 | Primary frequency modulation method for inhibiting repeated adjustment based on adjustment target setting |
| CN114204571B (en) * | 2021-11-05 | 2023-11-24 | 华能澜沧江水电股份有限公司 | Primary frequency modulation method for inhibiting repeated adjustment based on adjustment target setting |
| CN114188994B (en) * | 2021-11-05 | 2024-01-19 | 华能澜沧江水电股份有限公司 | Adjusting method for improving dynamic stability of primary frequency modulation adjusting process |
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Application publication date: 20210129 |