CN110556839A - primary frequency modulation control strategy of energy storage AGC (automatic gain control) auxiliary frequency modulation system of thermal power plant - Google Patents
primary frequency modulation control strategy of energy storage AGC (automatic gain control) auxiliary frequency modulation system of thermal power plant Download PDFInfo
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- CN110556839A CN110556839A CN201910739810.1A CN201910739810A CN110556839A CN 110556839 A CN110556839 A CN 110556839A CN 201910739810 A CN201910739810 A CN 201910739810A CN 110556839 A CN110556839 A CN 110556839A
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- frequency modulation
- energy storage
- primary frequency
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- modulation action
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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
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
Abstract
The invention discloses a primary frequency modulation control strategy of an energy storage AGC auxiliary frequency modulation system of a thermal power plant, which comprises the following steps: when the unit DCS generates a primary frequency modulation action signal, the energy storage EMS detects whether secondary frequency modulation is acting; if no secondary frequency modulation action exists, a primary frequency modulation action signal is normally sent to the energy storage EMS, and the energy storage is suspended; if the secondary frequency modulation is acting, comparing the directions of the secondary frequency modulation action and the primary frequency modulation action; if the two directions are consistent, a primary frequency modulation action signal is not sent to the energy storage EMS, and the energy storage is not suspended; if the two directions are not consistent, a primary frequency modulation action signal is normally sent to an energy storage EMS according to a primary frequency modulation priority principle, and the energy storage is suspended; and when the primary frequency modulation action signal disappears, the stored energy is recovered to normal operation. The invention obviously reduces the energy storage pause times and improves the operation efficiency of the energy storage system.
Description
Technical Field
The invention relates to the technical field of power grid AGC frequency modulation, in particular to a primary frequency modulation control strategy of an energy storage AGC auxiliary frequency modulation system of a thermal power plant.
Background
Energy storage AGC auxiliary frequency modulation systems are increasingly being applied to thermal power plants for assisting thermal power plant units in responding to AGC commands (secondary frequency modulation commands), and the typical working principle is shown in fig. 1. And an AGC instruction of the dispatching center simultaneously issues a set DCS and an energy storage EMS, and the energy storage EMS outputs power according to the deviation of the AGC instruction and the set actual power so as to eliminate the deviation.
The system can effectively improve the capacity of the thermal power plant unit for responding to the secondary frequency modulation, but simultaneously causes interference to the capacity of the thermal power plant unit for responding to the primary frequency modulation.
according to a primary frequency modulation action mechanism, the thermal power plant unit detects the change of the cycle wave (the rotating speed of a steam turbine) of the power grid, and spontaneously adjusts the power of the unit to stabilize the cycle wave of the power grid. Therefore, the energy storage system regards the unit power change caused by primary frequency modulation as disturbance to secondary frequency modulation, outputs power in the opposite direction, and objectively counteracts the primary frequency modulation effect.
Therefore, in the situation that the energy storage AGC auxiliary frequency modulation system of the thermal power plant is put into operation, the function of preventing the energy storage from interfering the primary frequency modulation of the unit is needed.
The following solutions are mainly used to realize this function:
the 'primary frequency modulation action' signal directly triggers the 'pause' of the energy storage system.
As shown in fig. 2, the unit DCS monitors the steam turbine rotation speed signal, and when the rotation speed is greater than 3002r/min or less than 2998r/min, it considers a "primary frequency modulation action", and the DCS sends the signal to the energy storage EMS. After the energy storage EMS receives a primary frequency modulation action signal of the unit, the EMS keeps the current power value of the stored energy unchanged; and when the primary frequency modulation action signal disappears, the energy storage system recovers the adjusting function and continues to respond to the secondary frequency modulation according to the AGC command.
This solution is easy to implement, but has the following problems:
1) The 'primary frequency modulation action' signal forcibly requires the energy storage to be suspended and keeps the current state, the primary frequency modulation signal is usually very frequent (the primary frequency modulation signal appears once in about 2-3 minutes on average), and the frequent 'suspension' influences the capability of the energy storage to quickly respond to the secondary frequency modulation.
2) the capacity of energy storage 'pause' is also influenced by the energy storage residual power, and when the residual electric quantity is insufficient, the energy storage cannot keep the current output power unchanged.
2. The stored energy follows the deviation action of the rotating speed of the steam turbine and participates in primary frequency modulation regulation.
As shown in fig. 3, the primary frequency modulation load correction amount required to be changed by the unit is calculated according to the deviation between the current rotating speed and the rated rotating speed of the steam turbine. And distributing the load correction quantity to the unit and the energy storage device to be executed respectively according to the states of the unit and the energy storage device. The scheme can prevent the energy storage system from reversely adjusting the primary frequency modulation, and simultaneously, the energy storage system participates in the primary frequency modulation adjustment, so that the adjustment burden of the unit is reduced.
the disadvantage is that an additional control system is required, the system design is complex, and the overall reliability of primary frequency modulation is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a primary frequency modulation control strategy of an energy storage AGC auxiliary frequency modulation system of a thermal power plant, combines the advantages of the two schemes, overcomes the defects, and not only can prevent the primary frequency modulation function of a unit from being influenced by energy storage, but also can better avoid the influence of frequent pause of energy storage on the secondary frequency modulation capability.
In order to realize the purpose, the invention adopts the technical scheme that:
A primary frequency modulation control strategy of an energy storage AGC auxiliary frequency modulation system of a thermal power plant comprises the following steps:
When the unit DCS generates a primary frequency modulation action signal, the energy storage EMS detects whether secondary frequency modulation is acting;
if no secondary frequency modulation action exists, indicating that the stored energy is in an idle period, a primary frequency modulation action signal is normally sent to an energy storage EMS, and the stored energy is suspended;
If the secondary frequency modulation is acting, comparing the directions of the secondary frequency modulation action and the primary frequency modulation action;
If the two directions are consistent, the secondary frequency modulation is favorable for primary frequency modulation, a primary frequency modulation action signal is not sent to the energy storage EMS, the energy storage is not suspended, and the normal action is kept;
if the directions of the two signals are not consistent, the secondary frequency modulation hinders the primary frequency modulation, and according to a primary frequency modulation priority principle, a primary frequency modulation action signal is normally sent to an energy storage EMS (energy storage management system), and the energy storage is suspended;
and when the primary frequency modulation action signal disappears, the stored energy is recovered to normal operation.
Compared with the prior art, the invention has the advantages that:
1. The control strategy of the invention does not need to add additional control equipment and has no influence on the original primary frequency modulation loop and function; the energy storage can be prevented from influencing the primary frequency modulation function of the unit, and the influence of frequent temporary suspension of the energy storage on the secondary frequency modulation capability can be better avoided; and under the condition that the primary frequency modulation direction and the secondary frequency modulation direction are consistent, the energy storage AGC plays a role in assisting primary frequency modulation.
2. Compared with the scheme that the energy storage is required to be kept unchanged according to the primary frequency modulation action signal of the unit, the energy storage is frequently suspended. The invention obviously reduces the energy storage pause times and improves the operation efficiency of the energy storage system.
3. Compared with the scheme that an energy storage system follows primary frequency modulation action, the energy storage system directly participates in primary frequency modulation adjustment. According to the invention, only when the secondary frequency modulation and the primary frequency modulation act in the same direction, the stored energy indirectly participates in the primary frequency modulation, no additional control equipment is required to be added, and the original primary frequency modulation loop is not required to be changed.
Drawings
FIG. 1 is a schematic diagram of an energy storage AGC assisted frequency modulation system;
FIG. 2 is a schematic diagram of a forced "pause" energy storage primary frequency modulation;
FIG. 3 is a schematic diagram of the energy storage following turbine speed deviation participating in primary frequency modulation regulation;
FIG. 4 is a schematic diagram of the energy storage primary frequency modulation based on the charge and discharge direction judgment of the present invention;
Fig. 5 is a logic diagram of a unit DCS sending a "primary frequency modulation action" signal to an energy storage EMS.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 4, the primary frequency modulation control strategy of the thermal power plant energy storage AGC auxiliary frequency modulation system of this embodiment includes the following steps:
When the unit DCS generates a primary frequency modulation action signal, the energy storage EMS detects whether secondary frequency modulation is acting;
If no secondary frequency modulation action exists, indicating that the stored energy is in an idle period, normally sending a primary frequency modulation action signal to an energy storage EMS (energy management system), pausing the stored energy, and keeping the current output unchanged by the stored energy;
If the secondary frequency modulation is acting, comparing the directions of the secondary frequency modulation action and the primary frequency modulation action;
If the two directions are consistent, the secondary frequency modulation is favorable for primary frequency modulation, a primary frequency modulation action signal is not sent to the energy storage EMS, the energy storage is not suspended, and a normal action (normally executing an AGC command issued by a dispatching center) is kept;
If the directions of the two signals are not consistent, the secondary frequency modulation hinders the primary frequency modulation, and according to a primary frequency modulation priority principle, a primary frequency modulation action signal is normally sent to an energy storage EMS (energy storage management system), and the energy storage is suspended;
And when the primary frequency modulation action signal disappears, the stored energy is recovered to normal operation.
The actual configuration logic of the DCS of the unit is shown in fig. 5, when the unit performs primary frequency modulation, the energy storage is suspended and the original state is maintained, but the following exceptions occur:
a. when the primary frequency modulation action of the unit needs to be loaded, the output of the energy storage EMS responding to the AGC is discharged;
b. When the primary frequency modulation action of the unit needs load reduction, the output of the energy storage EMS responding to the AGC is charging;
In the above way, the primary frequency modulation control strategy of the thermal power plant energy storage AGC auxiliary frequency modulation system does not need to add extra control equipment, and has no influence on the original primary frequency modulation loop and function; the energy storage can be prevented from influencing the primary frequency modulation function of the unit, and the influence of frequent temporary suspension of the energy storage on the secondary frequency modulation capability can be better avoided; and under the condition that the primary frequency modulation direction and the secondary frequency modulation direction are consistent, the energy storage AGC plays a role in assisting primary frequency modulation.
the above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. the utility model provides a thermal power plant's energy storage AGC assists frequency modulation system primary control strategy which characterized in that: the method comprises the following steps:
When the unit DCS generates a primary frequency modulation action signal, the energy storage EMS detects whether secondary frequency modulation is acting;
if no secondary frequency modulation action exists, indicating that the stored energy is in an idle period, a primary frequency modulation action signal is normally sent to an energy storage EMS, and the stored energy is suspended;
if the secondary frequency modulation is acting, comparing the directions of the secondary frequency modulation action and the primary frequency modulation action;
if the two directions are consistent, the secondary frequency modulation is favorable for primary frequency modulation, a primary frequency modulation action signal is not sent to the energy storage EMS, the energy storage is not suspended, and the normal action is kept;
If the directions of the two signals are not consistent, the secondary frequency modulation hinders the primary frequency modulation, and according to a primary frequency modulation priority principle, a primary frequency modulation action signal is normally sent to an energy storage EMS (energy storage management system), and the energy storage is suspended;
And when the primary frequency modulation action signal disappears, the stored energy is recovered to normal operation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787340A (en) * | 2021-01-04 | 2021-05-11 | 上海外高桥第三发电有限责任公司 | Control method for combined frequency modulation of thermal power and energy storage system |
| CN113315146A (en) * | 2021-06-02 | 2021-08-27 | 华润电力湖南有限公司 | Energy storage system frequency modulation control method, terminal and computer readable storage medium |
| CN113937790A (en) * | 2021-10-12 | 2022-01-14 | 云南电网有限责任公司电力科学研究院 | Matching method for primary frequency modulation and secondary frequency modulation of electrochemical energy storage system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050001595A1 (en) * | 2003-07-02 | 2005-01-06 | May Marcus W. | Method and apparatus to perform battery charging using a DC-DC converter circuit |
| CN104201670A (en) * | 2014-08-28 | 2014-12-10 | 湖南大学 | Cooperative control method and system of battery energy storage power source participating in secondary frequency modulation of power grid |
| CN106786693A (en) * | 2016-12-20 | 2017-05-31 | 浙江海洋大学 | For primary frequency modulation and a kind of energy storage device system of AGC auxiliary adjustment technologies |
| CN107611995A (en) * | 2017-08-18 | 2018-01-19 | 大唐户县第二热电厂 | Primary frequency modulation optimization method |
| CN108539764A (en) * | 2018-06-07 | 2018-09-14 | 中安创盈能源科技产业有限公司 | A kind of device and method of thermoelectricity joint energy storage response primary frequency modulation and frequency modulation frequency modulation |
| CN109659984A (en) * | 2018-12-12 | 2019-04-19 | 国家电网有限公司 | AGC control method for coordinating, apparatus and system suitable for a variety of frequency modulation measures |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
| CN110212552A (en) * | 2019-06-11 | 2019-09-06 | 中国神华能源股份有限公司 | The control method and system of thermal power generation unit primary frequency modulation |
-
2019
- 2019-08-12 CN CN201910739810.1A patent/CN110556839A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050001595A1 (en) * | 2003-07-02 | 2005-01-06 | May Marcus W. | Method and apparatus to perform battery charging using a DC-DC converter circuit |
| CN104201670A (en) * | 2014-08-28 | 2014-12-10 | 湖南大学 | Cooperative control method and system of battery energy storage power source participating in secondary frequency modulation of power grid |
| CN106786693A (en) * | 2016-12-20 | 2017-05-31 | 浙江海洋大学 | For primary frequency modulation and a kind of energy storage device system of AGC auxiliary adjustment technologies |
| CN107611995A (en) * | 2017-08-18 | 2018-01-19 | 大唐户县第二热电厂 | Primary frequency modulation optimization method |
| CN108539764A (en) * | 2018-06-07 | 2018-09-14 | 中安创盈能源科技产业有限公司 | A kind of device and method of thermoelectricity joint energy storage response primary frequency modulation and frequency modulation frequency modulation |
| CN109659984A (en) * | 2018-12-12 | 2019-04-19 | 国家电网有限公司 | AGC control method for coordinating, apparatus and system suitable for a variety of frequency modulation measures |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
| CN110212552A (en) * | 2019-06-11 | 2019-09-06 | 中国神华能源股份有限公司 | The control method and system of thermal power generation unit primary frequency modulation |
Non-Patent Citations (1)
| Title |
|---|
| 金光等: "广西大化一次调频与二次调频配合关系优化处理", 《水电自动化与大坝监测》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787340A (en) * | 2021-01-04 | 2021-05-11 | 上海外高桥第三发电有限责任公司 | Control method for combined frequency modulation of thermal power and energy storage system |
| CN112787340B (en) * | 2021-01-04 | 2023-07-18 | 上海外高桥第三发电有限责任公司 | Control method for joint frequency modulation of thermal power and energy storage system |
| CN113315146A (en) * | 2021-06-02 | 2021-08-27 | 华润电力湖南有限公司 | Energy storage system frequency modulation control method, terminal and computer readable storage medium |
| CN113315146B (en) * | 2021-06-02 | 2023-04-18 | 华润电力湖南有限公司 | Energy storage system frequency modulation control method, terminal and computer readable storage medium |
| CN113937790A (en) * | 2021-10-12 | 2022-01-14 | 云南电网有限责任公司电力科学研究院 | Matching method for primary frequency modulation and secondary frequency modulation of electrochemical energy storage system |
| CN113937790B (en) * | 2021-10-12 | 2024-02-06 | 云南电网有限责任公司电力科学研究院 | Matching method for primary frequency modulation and secondary frequency modulation of electrochemical energy storage system |
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