CN111769576A - Method, system, device and medium for controlling power frequency of energy storage resource electric power system - Google Patents
Method, system, device and medium for controlling power frequency of energy storage resource electric power system Download PDFInfo
- Publication number
- CN111769576A CN111769576A CN202010718061.7A CN202010718061A CN111769576A CN 111769576 A CN111769576 A CN 111769576A CN 202010718061 A CN202010718061 A CN 202010718061A CN 111769576 A CN111769576 A CN 111769576A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- control
- storage resource
- power
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000004590 computer program Methods 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 13
- 238000007667 floating Methods 0.000 claims description 6
- 238000010248 power generation Methods 0.000 abstract description 13
- 206010003591 Ataxia Diseases 0.000 abstract description 2
- 206010010947 Coordination abnormal Diseases 0.000 abstract description 2
- 208000016290 incoordination Diseases 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 230000004044 response Effects 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention belongs to the field of power system control, and discloses a power frequency control method, a system, equipment and a medium for an energy storage resource power system, wherein the control method comprises the following steps: acquiring the regional control deviation and the control performance strategy adjustment requirement of a control region, and acquiring the control region adjustment requirement according to the regional control deviation and the control performance strategy adjustment requirement; and obtaining a control target of the energy storage resource by combining a preset energy storage resource base point power according to an adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource. By adding the energy storage resources, the power regulation capability of the regional power grid is improved, a larger regulation range can be provided, and meanwhile, the incoordination between energy storage resource regulation and power generation resource regulation can be avoided based on the distribution of the regulation requirements of the control region.
Description
Technical Field
The invention belongs to the field of power system control, and relates to a power frequency control method, a power frequency control system, power frequency control equipment and power frequency control media for an energy storage resource power system.
Background
The power system is a system for dynamically balancing power generation and utilization, the unbalance amount of the power generation and utilization can cause the frequency fluctuation of the system, and the power utilization balance of the regional power grid not only relates to the power generation and utilization in the region, but also relates to the exchange power with an external power grid. In order to maintain the frequency stability of the regional power grid and reduce the exchange power deviation, an automatic power generation control (AGC) system is introduced into the power system, and the dynamic balance of the generation electric power of the regional power grid is realized by adjusting the power of the power generation resource. As various non-generator resources begin to participate in system regulation, the regulation resources often have respective decision logic, control systems and management platforms, and mutual coordination is difficult to achieve, so that the active regulation pressure of the power system is gradually increased. Meanwhile, the AGC system presents the problem of control object limitation and control mode limitation. In the aspect of control objects, the power generation resource adjustment is mainly used, and the adjustment capability is limited; in the aspect of a control mode, non-unit resources generally need to be designed and derived into an equivalent unit model, control of other resources is achieved through a control mode similar to a unit, and control deviation exists.
At present, various demand response technologies are generally adopted to control adjustable resources to participate in system regulation, and power regulation is required to be carried out on controllable resources at a fixed time period or in advance for a certain time by signing a contract. However, various demand response technologies lack global coordination, generally take one or more control targets as a main point, set control logic for adjusting resources, and if conditions are met, the resources autonomously respond, so that the adjustment demands of the power system are difficult to obtain, and the action information of other adjustment resources of the power system cannot be obtained, so that the risk of overshoot, undershoot and adjustment conflicts is high.
In summary, the power frequency control of the energy storage resource power system at present has the problems of limited regulation capability and high risk of overshoot, undershoot and regulation conflict caused by the uncoordinated regulation of various resources.
Disclosure of Invention
The invention aims to overcome the defects that the regulation capability of the power frequency control of the energy storage resource power system in the prior art is limited, and the risk of overshoot, undershoot and regulation conflict caused by the uncoordinated regulation of various resources is high, and provides a method, a system, equipment and a medium for controlling the power frequency of the energy storage resource power system.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in a first aspect of the present invention, a method for controlling power frequency of an energy storage resource power system includes the following steps:
acquiring the regional control deviation and the control performance strategy adjustment requirement of a control region, and acquiring the control region adjustment requirement according to the regional control deviation and the control performance strategy adjustment requirement;
and obtaining a control target of the energy storage resource by combining a preset energy storage resource base point power according to an adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource.
The power frequency control method of the energy storage resource electric power system is further improved in that:
the specific method for acquiring the area control deviation of the control area comprises the following steps:
the method comprises the steps of obtaining real-time frequency and real-time exchange power of an area power grid in a control area, obtaining frequency deviation and exchange power deviation of the control area by combining a rated frequency and an exchange power plan of the area power grid in the control area, and obtaining area control deviation of the control area according to the frequency deviation and the exchange power deviation.
The specific method for obtaining the control area adjustment requirement according to the area control deviation and the control performance strategy adjustment requirement comprises the following steps:
the method comprises the steps of respectively filtering and integrating the area control deviation to obtain a filtering area control deviation and an area control deviation integral, obtaining a control area adjustment demand proportional component according to the filtering area control deviation and combining a preset proportional component gain, obtaining a control area adjustment demand integral component according to the area control deviation integral and combining a preset integral gain, taking a control performance strategy adjustment demand as a control area adjustment demand control performance strategy component, and overlapping the control area adjustment demand proportional component, the control area adjustment demand integral component and the control area adjustment demand control performance strategy component to obtain a control area adjustment demand.
The specific method for obtaining the control target of the energy storage resource by combining the preset energy storage resource base point power according to the adjustment interval to which the adjustment requirement of the control area belongs is as follows:
determining the adjustment requirement of the energy storage resource by combining the preset base point power of the energy storage resource according to the adjustment interval to which the adjustment requirement of the control area belongs;
the regulation interval comprises a regulation dead zone, a normal regulation zone, a secondary emergency regulation zone and an emergency regulation zone;
when the adjustment requirement of the control area belongs to the adjustment dead zone, the adjustment requirement of the energy storage resource is 0;
when the regulation requirement of the control area belongs to a normal regulation area or a secondary emergency regulation area, the regulation requirement of the energy storage resource is the regulation requirement of the control area with a preset sharing coefficient;
when the regulation requirement of the control area belongs to the emergency regulation area, the regulation requirement of the energy storage resource is the regulation quantity from the base point power of the energy storage resource to the adjustable boundary of the energy storage resource;
and superposing the adjustment requirement of the energy storage resource with the preset base point power of the energy storage resource to obtain the control target of the energy storage resource.
The adjustable boundary of the energy storage resource is the intersection of the adjustable range of the energy storage resource under the electric quantity constraint condition of the energy storage resource and the adjustable range of the energy storage resource under the constraint condition of the section controller of the energy storage resource.
The base point power of the energy storage resource is preset according to a control mode of the energy storage resource, wherein the control mode comprises a user autonomous mode, a charging mode, a discharging mode, a floating base point mode, an emergency charging mode and an emergency discharging mode;
when the control mode is the user autonomous mode, the base point power of the energy storage resource is set as the real-time power of the battery pack in the energy storage resource;
when the control mode is the charging mode or the emergency charging mode, the base point power of the energy storage resource is set as the rated charging power of the battery pack in the energy storage resource;
when the control mode is the discharging mode or the emergency discharging mode, the base point power of the energy storage resource is set as the rated discharging power of the battery pack in the energy storage resource;
when the control mode is a floating base point mode, the base point power of the energy storage resource is set according to the current electric quantity ratio of the battery pack in the energy storage resource, and when the current electric quantity ratio is lower than the low-order electric quantity ratio, the base point power of the energy storage resource is set as the rated charging power; when the current electric quantity ratio is higher than the high-order electric quantity ratio, the power of the base point of the energy storage resource is set as the rated discharge power; and when the current electric quantity ratio is not lower than the low electric quantity ratio and not higher than the high electric quantity ratio, the base point power of the energy storage resource is set to be 0.
The specific method for adjusting the energy storage resources according to the control target of the energy storage resources comprises the following steps:
and presetting a command dead zone, when the deviation between the control target of the energy storage resource and the real-time power of the energy storage resource exceeds the command dead zone, generating a control instruction according to the control target of the energy storage resource, and sending the control instruction to the energy storage controller for energy storage resource adjustment.
In a second aspect of the present invention, a power frequency control system for an energy storage resource power system includes:
the information acquisition module is used for acquiring the regional control deviation of the control region and the control performance strategy adjustment requirement;
the adjusting requirement determining module is used for obtaining the adjusting requirement of the control area according to the area control deviation and the adjusting requirement of the control performance strategy; and
and the energy storage resource adjusting module is used for obtaining a control target of the energy storage resource by combining the preset energy storage resource base point power according to the adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource.
In a third aspect of the present invention, a terminal device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the above energy storage resource power system power frequency control method when executing the computer program.
In a fourth aspect of the present invention, a computer readable storage medium stores a computer program, which when executed by a processor implements the steps of the above energy storage resource power system power frequency control method.
Compared with the prior art, the invention has the following beneficial effects:
according to the power frequency control method of the energy storage resource electric power system, the energy storage resource is introduced to adjust the power frequency control of the energy storage resource electric power system, the power adjusting capacity of a regional power grid is increased compared with the AGC technology, especially when the adjustable capacity of the power generation resource in a control region is insufficient, the frequency fluctuation of the regional power grid is increased, the exchange power deviation of the regional power grid is increased, so that the stability of the regional power grid is influenced, the regional power frequency control index is deteriorated, and the problem can be effectively relieved by adding the energy storage resource. Meanwhile, compared with a demand response technology, the energy storage resource receives a unified scheduling instruction, so that the discordance of various resource adjustments and power generation resource adjustments can be avoided, the problem that the risk of overshoot, undershoot and adjustment conflict is high due to the fact that the demand response technology is difficult to acquire system adjustment requirements and cannot acquire action information of other adjustment resources of the system under autonomous response is effectively solved, the mode of uniformly distributing the adjustment requirements of the control area is adopted, the operation characteristics of the adjustment resources and the uniform demand sharing of the system adjustment are considered, and the risks can be greatly reduced.
Drawings
FIG. 1 is a logic diagram of power frequency control of an energy storage resource power system according to the present invention;
fig. 2 is a flow chart of a power frequency control method of an energy storage resource power system according to an embodiment of the invention;
FIG. 3 is a detailed flow chart of a method for controlling power frequency of an energy storage resource power system according to an embodiment of the invention;
fig. 4 is a block diagram of a power frequency control system of an energy storage resource power system according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
First, related terms to which the present invention relates are introduced.
Automatic power control (AGC): a real-time control system calculates system adjustment requirements according to frequency deviation and exchange power deviation of a power system in a control area, and shares the requirements to a unit participating in adjustment, so that system frequency stability is maintained, and exchange power deviation of the control area is reduced.
Automatic Power Control (APC): a real-time control system is improved in an AGC system, and a control object of the system is expanded from a power generation resource to all power adjustable resources. The control target is to maintain the frequency stability of the system and reduce the exchange power deviation of the control area by adjusting the power of all resources participating in regulation and control, including power generation resources, controllable loads and energy storage resources.
Exchange power deviation: the control area power grid and the external area power grid are interconnected through a plurality of connecting lines, the connecting lines are channels for energy exchange between the control area power grid and the outside, a superior power grid generally sends out or receives a plan of power sending out or entering of the channels, the plan is an exchange power plan, during real-time operation, the power of high channels is added to the exchange power, and the deviation of the power of high channels and the exchange power plan is exchange power deviation.
An energy storage controller: and (3) participating in the actual regulation object of the APC system, counting the battery pack regulation parameters by the energy storage controller, sending the battery pack regulation parameters to the APC system, receiving the control instruction of the APC system, and regulating the battery pack power.
A battery pack: the energy storage device is controlled by an energy storage controller and is generally formed by connecting a plurality of batteries in series and parallel.
A control area: regional power grids are usually divided by provincial administrative districts, and a control region mainly comprises power elements such as alternating current and direct current lines, generators, loads and transformers in the region. The ac/dc line interconnecting with the external power grid is called a tie line.
Area Control Error (ACE): and calculating the control deviation of the control area according to the frequency deviation and the exchange power deviation of the control area, and calculating the real-time power regulation requirement of the control area according to the control deviation of the control area.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, which shows the logic of the power frequency Control method of the energy storage resource power system of the present invention, an APC system obtains the real-time frequency of the regional power grid in a Control region from a Data Acquisition And monitoring Control System (SCADA), And counts the real-time exchange power of the regional power grid; calculating a Control Area frequency deviation and an exchange power deviation, thereby calculating an Area Control deviation (ACE); calculating a Control Area adjustment Requirement (ARR) according to a Control Performance Strategy (CPS) adjustment Requirement of filtering, integration and superposition; calculating the adjustment requirement of the adjustable resource according to the adjustable range, the control mode and the sharing coefficient of the adjustable resource; and superposing the power of the base point of the adjustable resource to adjust the power, checking to obtain a control target, issuing the control target to the corresponding controller, and adjusting the adjustable resource through the controller.
Based on the above control logic, referring to fig. 2 and 3, a method for controlling power frequency of an energy storage resource power system provided in an embodiment of the present invention is shown, including the following steps:
s1: and acquiring the regional control deviation of the control region and the adjustment requirement of the control performance strategy.
Specifically, to obtain the zone control deviation of the control zone, the frequency deviation and the switching power deviation of the control zone are first determined. In the embodiment, the real-time frequency and the real-time exchange power of the regional power grid in the control region are acquired in real time through the SCADA system, wherein the SCADA system is a computer-based production process control and scheduling automation system, can monitor and control on-site operating equipment, and has the advantages of complete information, efficiency improvement, correct control of the system operating state, decision acceleration, capability of helping to quickly diagnose the system fault state and the like.
The real-time frequency and the real-time exchange power acquired by the SCADA system are utilized, and further the rated frequency and the exchange power plan of the regional power grid in the control region are combined, the frequency deviation of the control region can be obtained after the difference between the real-time frequency and the rated frequency is corrected through the regional power grid frequency deviation coefficient, and the exchange power deviation is reflected as the difference between the real-time exchange power and the exchange power plan. The rated frequency and the exchange power plan are preset in advance and can be determined according to regional power grid parameters. After obtaining the frequency deviation and the exchange power deviation of the control area, the area control deviation of the control area can be obtained by the following formula:
ACEraw＝10*B*(f-f0)+(I-I0)
wherein, ACErawIs regional control deviation, B is regional power grid frequency deviation coefficient, unit MW/0.1Hz, f is real-time frequency, f is0For nominal frequency, I for real-time exchange power, I0To exchange power plans.
The control performance strategy adjustment requirement is designed by considering CPS indexes, ensures that under the condition of multi-region interconnection, the adjustment requirement of the region not only ensures the power frequency stability of the region, but also provides power support for adjacent regions, and determines the control performance strategy adjustment requirement P under the CPS standard through the following formulaCPS：
PCPS＝-10*GCPS*Δf
Wherein G isCPSFor CPS gain, Δ f is the deviation of the real-time frequency from the rated frequency, i.e., the system frequency deviation, and for avoiding excessive regulation power, the value margin of the system frequency deviation is [ -0.2, 0.2]Hz，GCPSAnd the absolute value of the maximum direction ACE which can be accepted when the frequency deviation of the system reaches 0.1Hz is shown, and the value is determined by a dispatcher according to the size of the local area power grid and the regulation performance.
S2: and obtaining a control area adjustment requirement according to the area control deviation and the control performance strategy adjustment requirement.
Specifically, the control area adjustment requirement generally includes three components, which are a control area adjustment requirement proportional component, a control area adjustment requirement integral component, and a control area adjustment requirement control performance policy component.
The proportional component of the adjustment requirement of the control area is proportional to the filtering value of the ACE, the adjustment component which enables the ACE to pass through a 0 point is generated through power control, and the adjustment component is obtained through calculation of the control deviation of the filtering area and the gain of the proportional component. The filtering region control deviation is obtained by filtering the region control deviation, and in this embodiment, a filtering method as described in the following formula is provided:
wherein, ACEfiltFor controlling the deviation of the filter area, aiAs attenuation coefficient, NhisFor the historical record number of the area control deviation, generally 15 historical sampling points are taken, i is the serial number of the historical area control deviation, ACEraw(i) I.e. the history zone control offset representing the sequence number i.
After the control deviation and the proportional component gain of the filtering area are obtained, the proportional component required for adjusting the control area is obtained through the following formula:
PP＝-Gp*ACEfilt
wherein, PPAdjusting the proportional component of demand for the control area, GpIs the proportional component gain. The proportional component gain is under the CPS index, and the proportional component gain is 1 to ensure that ACE is controlled to 0, but not limited to this, and may be different values under other standards.
The integral component of demand for the control area adjustment is to ensure that ACE can be T for a certain period of timeCPSAverage value not exceeding prescribed range L10The set control region adjusts the demand component, and introduces the maximum integral component I to avoid the overlarge integral componentmaxAnd the integral is obtained by combining the integral of the regional control deviation with the integral gain. Specifically, the area control deviation is integrated to obtain an area control deviation integral, and the integral gain G is obtained by the following formulaI：
After obtaining the area control deviation integral and the integral gain, obtaining the integral component of the control area adjustment requirement through the following formula:
PI＝-GI*ACEI
wherein, PIAdjusting the integral component of demand, ACE, for a control areaIThe area control deviation is integrated.
The control region adjustment requirement the control performance policy component adjusts the requirement using a control performance policy.
After the control area adjustment demand proportional component, the control area adjustment demand integral component and the control area adjustment demand control performance strategy component are obtained, the control area adjustment demand proportional component, the control area adjustment demand integral component and the control area adjustment demand control performance strategy component are overlapped, as shown in the following formula, so that a control area adjustment demand P can be obtainedARR：
PARR＝PP+PI+PCPS。
S3: and obtaining a control target of the energy storage resource by combining a preset energy storage resource base point power according to the regulation interval to which the regulation requirement of the control area belongs.
Specifically, firstly, the regulation interval of a control area is determined, and the control area regulation interval is generally divided into a regulation dead zone, a normal regulation area, a secondary emergency regulation area and an emergency regulation area according to the division of the current AGC technology, wherein the control deviation of the regulation dead zone system area is extremely small, the regulation dead zone system area is an ideal state of the operation of a power grid, and the regulation resource does not need to change the power of the regulation resource; the normal regulation area is usually generated by load fluctuation, prediction error and the like, and conventional resources are required to be regulated, so that the area control deviation returns to a regulation dead zone; the system control deviation of the secondary emergency adjusting area is large, and conventional resources and secondary emergency adjusting resources need to be adjusted, so that the area control deviation quickly returns to an adjusting dead zone; the emergency adjusting area indicates that the control deviation of the area is extremely large, and all adjustable resources in the control area comprise conventional adjusting resources, secondary emergency adjusting resources and emergency adjusting resources which need to adjust power according to the adjusting step length; according to different adjustment intervals to which the adjustment requirements of the control area belong, the adjustment requirements of the control area are shared to the energy storage resources in different sharing modes, and the adjustment requirements of the energy storage resources are further determined by combining the base point power of the energy storage resources.
In order to determine the regulation requirement of the energy storage resource, the base point power of the energy storage resource needs to be determined first. In this embodiment, the base point power of the energy storage resource is preset according to the control mode of the energy storage resource. Specifically, the common control modes of the energy storage resource include a user autonomous mode, a charging mode, a discharging mode, a floating base mode, an emergency charging mode, and an emergency discharging mode.
When the control mode is the user autonomous mode, the base point power of the energy storage resource is set as the real-time power of the battery pack in the energy storage resource as shown in the following formula:
Pbase＝Pcur_dev
wherein, PbaseBase point power, P, for energy storage resourcescur_devBattery pack real-time power for energy storage resources.
When the control mode is the charging mode or the emergency charging mode, the base point power of the energy storage resource is set as the rated charging power of the battery pack in the energy storage resource as shown in the following formula:
Pbase＝Pchgcp_dev
wherein, Pchgcp_devThe rated charging power of the battery pack of the energy storage resource is obtained.
When the control mode is the discharging mode or the emergency discharging mode, the base point power of the energy storage resource is set as the rated discharging power of the battery pack in the energy storage resource as shown in the following formula:
Pbase＝Pdiscp_dev
wherein, Pdiscp_devThe rated discharge power of the battery pack which is an energy storage resource.
When the control mode is the floating base point mode, as shown in the following formula, the energy storage resource base point power is set according to the current electric quantity ratio of the battery pack in the energy storage resource, and when the current electric quantity ratio is lower than the low electric quantity ratio, the energy storage resource base point power is set as the rated charging power; when the current electric quantity ratio is higher than the high-order electric quantity ratio, the power of the base point of the energy storage resource is set as the rated discharge power; when the current electric quantity ratio is not lower than the low electric quantity ratio and not higher than the high electric quantity ratio, the base point power of the energy storage resource is set to be 0:
wherein, RTcurFor the current power ratio, RTlowAt a low charge ratio, RThigThe high-order electric quantity ratio.
And the electric quantity ratio is the ratio of the electric quantity stored by the energy storage resource in real time to the maximum storage electric quantity of the equipment. The low-level electric quantity line of a common energy storage power station is 5% -20%, the high-level electric quantity line is 80% -95%, deep charging and deep discharging of an energy storage power supply are reduced, namely the energy storage power supply is reduced to be in a low-level electric quantity state and a high-level electric quantity state, and the service life of energy storage equipment can be prolonged.
And after the power of the base point of the energy storage resource is determined, determining the sharing mode of the energy storage resource according to the adjustment interval to which the adjustment requirement of the control area belongs. Specifically, as shown in the following formula, when the adjustment requirement of the control area belongs to the adjustment dead zone, the adjustment requirement of the energy storage resource is 0; when the regulation requirement of the control area belongs to a normal regulation area or a secondary emergency regulation area, the regulation requirement of the energy storage resource is the regulation requirement of the control area with a preset sharing coefficient; when the regulation requirement of the control area belongs to the emergency regulation area, the regulation requirement of the energy storage resource is the regulation quantity from the base point power of the energy storage resource to the adjustable boundary of the energy storage resource:
wherein, PregIn order to regulate the demand for energy storage resources,
for a practical adjustable upper limit of the energy storage resource,P SEfor a practically adjustable lower limit of energy storage resources, CiSharing factor set for energy storage resources, CtotThe sum of the share factors for all resources participating in the regulation,
in order to adjust the upper bound of the dead zone,
in order to adjust the lower bound of the dead zone,
in order to provide an upper bound for the secondary emergency regulation zone, EPthe lower bound of the sub-emergency regulatory region.
And 2 EP- ∞) as an emergency regulation zone,
indicated as the adjustment of the dead band,
denoted as normal regulatory region and secondary emergency regulatory region.
The energy storage resource does not bear the regulation requirement of the control area in the regulation dead zone, bears the regulation requirement of the control area in the normal regulation area and the secondary emergency regulation area according to the sharing coefficient proportion, and bears the regulation quantity from the base point power to the adjustable boundary in the emergency regulation area.
In the above process, the actual adjustable upper limit of the energy storage resource and the actual adjustable lower limit of the energy storage resource are used, because the energy storage resource is subject to the adjustable range of the limits of various constraint conditions, and the actual adjustable range is the intersection of the adjustable ranges under the constraint conditions. The constraints typically include electrical constraints and profile controller constraints.
The adjustable range calculation formula under the electric quantity constraint is as follows:
wherein the content of the first and second substances,
the battery pack is provided with an adjustable upper bound,SOC mileadjustable lower bound, SOC, for battery packscIs the current battery level, T, of the battery packdlFor the target electric quantity to reach the end time, TcThe power target tracks the reserved time,
adjustable upper bound, SOC, for energy storage resources under battery power constraintsdesIn order to be the target of the amount of electricity,P socand the lower limit of the energy storage resource can be adjusted under the constraint of the electric quantity of the battery.
The adjustable range calculation formula under the section constraint is as follows:
wherein the content of the first and second substances,
adjustable upper bound, P, of energy storage resources under section constraintssubIn order to exchange the power in real time for the cross section,
for the upper limit of cross-sectional exchange power, PcurIn order to store the real-time power of the energy resources,P secthe adjustable lower bound of the energy storage resource under the section constraint,P subthe lower bound of cross-sectional exchange power. The real-time exchange power of the cross section takes the inflow direction as negative and the outflow direction as positive.
The actual adjustable range calculation formula is as follows:
through the method, the regulation requirement of the energy storage resource is obtained, and as shown in the following formula, the regulation requirement of the energy storage resource is superposed with the preset base point power of the energy storage resource to obtain the control target of the energy storage resource:
Pdes＝Pbase+Preg
wherein, PdesIs the control target of the energy storage resource, namely the target power of the energy storage resource.
S4: and adjusting the energy storage resources according to the control target of the energy storage resources.
Specifically, in order to reduce frequent adjustment of the energy storage resources, a command dead zone is preset, when the deviation between the control target of the energy storage resources and the real-time power of the energy storage resources exceeds the command dead zone, an energy storage resource adjustment control instruction is generated according to the target power of the energy storage resources, then the control instruction is sent to the SCADA system, and then the SCADA system controls the corresponding energy storage controller to adjust the energy storage resources. The control instruction comprises target power of the energy storage resource, an energy storage controller id and station id information of the energy storage controller.
When the deviation between the control target of the energy storage resource and the real-time power of the energy storage resource does not exceed the command dead zone, the energy storage resource is not adjusted, so that the frequent adjustment of the energy storage resource is reduced.
In summary, according to the power frequency control method of the energy storage resource electric power system, the energy storage resource is introduced to adjust the power frequency control of the energy storage resource electric power system, so that compared with the AGC technology, the power adjustment capability of the regional power grid is increased, especially when the adjustable capacity of the power generation resource in the control region is insufficient, the frequency fluctuation of the regional power grid is increased, the exchange power deviation of the regional power grid is increased, the stability of the regional power grid is affected, the regional power frequency control index is deteriorated, and the problem can be effectively alleviated by adding the energy storage resource. Meanwhile, compared with a demand response technology, the energy storage resource receives a unified scheduling instruction, and the incoordination between various resource adjustments and power generation resource adjustments can be avoided. The problems that the demand response technology is usually autonomous response, the system regulation demand is difficult to obtain, the action information of other regulation resources of the system cannot be obtained, and the risks of overshoot, undershoot and regulation conflict are high are effectively solved.
Referring to fig. 4, a power frequency control system of an energy storage resource power system according to still another embodiment of the present invention is shown, where the power frequency control system of the energy storage resource power system includes an information obtaining module, an adjustment requirement determining module, and an energy storage resource adjusting module.
The information acquisition module is used for acquiring the regional control deviation of the control region and the control performance strategy adjustment requirement; the adjusting demand determining module is used for obtaining the adjusting demand of the control area according to the area control deviation and the adjusting demand of the control performance strategy; the energy storage resource adjusting module is used for obtaining a control target of the energy storage resource by combining a preset energy storage resource base point power according to an adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource.
In yet another embodiment of the present invention, a terminal device is provided that includes a processor and a memory, the memory storing a computer program comprising program instructions, the processor executing the program instructions stored by the computer storage medium. The Processor may be a Central Processing Unit (CPU), or may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable gate array (FPGA) or other Programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which is a computing core and a control core of the terminal, and is adapted to implement one or more instructions, and is specifically adapted to load and execute one or more instructions to implement a corresponding method flow or a corresponding function; the processor according to the embodiment of the present invention may be used for operating a power frequency control method of an energy storage resource power system, including: acquiring the regional control deviation and the control performance strategy adjustment requirement of a control region, and acquiring the control region adjustment requirement according to the regional control deviation and the control performance strategy adjustment requirement; and obtaining a control target of the energy storage resource by combining a preset energy storage resource base point power according to an adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource.
In still another embodiment, the present invention also provides a computer-readable storage medium (Memory) which is a Memory device in a terminal device and stores programs and data. It is understood that the computer readable storage medium herein may include a built-in storage medium in the terminal device, and may also include an extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. It should be noted that the computer-readable storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory.
One or more instructions stored in a computer-readable storage medium may be loaded and executed by a processor to implement the corresponding steps of the method in the above-described embodiments of the method for controlling power frequency of an energy storage resource electric power system; one or more instructions in the computer-readable storage medium are loaded by the processor and perform the steps of: acquiring the regional control deviation and the control performance strategy adjustment requirement of a control region, and acquiring the control region adjustment requirement according to the regional control deviation and the control performance strategy adjustment requirement; and obtaining a control target of the energy storage resource by combining a preset energy storage resource base point power according to an adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A power frequency control method of an energy storage resource electric power system is characterized by comprising the following steps:
acquiring the regional control deviation and the control performance strategy adjustment requirement of a control region, and acquiring the control region adjustment requirement according to the regional control deviation and the control performance strategy adjustment requirement;
and obtaining a control target of the energy storage resource by combining a preset energy storage resource base point power according to an adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource.
2. The power frequency control method of the energy storage resource electric power system according to claim 1, wherein the specific method for obtaining the area control deviation of the control area is as follows:
the method comprises the steps of obtaining real-time frequency and real-time exchange power of an area power grid in a control area, obtaining frequency deviation and exchange power deviation of the control area by combining a rated frequency and an exchange power plan of the area power grid in the control area, and obtaining area control deviation of the control area according to the frequency deviation and the exchange power deviation.
3. The power frequency control method of the energy storage resource electric power system according to claim 1, wherein the specific method for obtaining the control area regulation requirement according to the area control deviation and the control performance strategy regulation requirement is as follows:
the method comprises the steps of respectively filtering and integrating the area control deviation to obtain a filtering area control deviation and an area control deviation integral, obtaining a control area adjustment demand proportional component according to the filtering area control deviation and combining a preset proportional component gain, obtaining a control area adjustment demand integral component according to the area control deviation integral and combining a preset integral gain, taking a control performance strategy adjustment demand as a control area adjustment demand control performance strategy component, and overlapping the control area adjustment demand proportional component, the control area adjustment demand integral component and the control area adjustment demand control performance strategy component to obtain a control area adjustment demand.
4. The power frequency control method of the energy storage resource power system according to claim 1, wherein the specific method for obtaining the control target of the energy storage resource by combining the preset base point power of the energy storage resource according to the regulation interval to which the regulation requirement of the control area belongs is as follows:
determining the adjustment requirement of the energy storage resource by combining the preset base point power of the energy storage resource according to the adjustment interval to which the adjustment requirement of the control area belongs;
the regulation interval comprises a regulation dead zone, a normal regulation zone, a secondary emergency regulation zone and an emergency regulation zone;
when the adjustment requirement of the control area belongs to the adjustment dead zone, the adjustment requirement of the energy storage resource is 0;
when the regulation requirement of the control area belongs to a normal regulation area or a secondary emergency regulation area, the regulation requirement of the energy storage resource is the regulation requirement of the control area with a preset sharing coefficient;
when the regulation requirement of the control area belongs to the emergency regulation area, the regulation requirement of the energy storage resource is the regulation quantity from the base point power of the energy storage resource to the adjustable boundary of the energy storage resource;
and superposing the adjustment requirement of the energy storage resource with the preset base point power of the energy storage resource to obtain the control target of the energy storage resource.
5. The power frequency control method of the energy storage resource power system according to claim 1, wherein the adjustable boundary of the energy storage resource is an intersection of an adjustable range of the energy storage resource under the constraint of the electric quantity of the energy storage resource and an adjustable range of the energy storage resource under the constraint of a section controller of the energy storage resource.
6. The power frequency control method of the energy storage resource power system according to claim 1, wherein the energy storage resource base point power is preset according to a control mode of the energy storage resource, wherein the control mode includes a user autonomous mode, a charging mode, a discharging mode, a floating base point mode, an emergency charging mode and an emergency discharging mode;
when the control mode is the user autonomous mode, the base point power of the energy storage resource is set as the real-time power of the battery pack in the energy storage resource;
when the control mode is the charging mode or the emergency charging mode, the base point power of the energy storage resource is set as the rated charging power of the battery pack in the energy storage resource;
when the control mode is the discharging mode or the emergency discharging mode, the base point power of the energy storage resource is set as the rated discharging power of the battery pack in the energy storage resource;
when the control mode is a floating base point mode, the base point power of the energy storage resource is set according to the current electric quantity ratio of the battery pack in the energy storage resource, and when the current electric quantity ratio is lower than the low-order electric quantity ratio, the base point power of the energy storage resource is set as the rated charging power; when the current electric quantity ratio is higher than the high-order electric quantity ratio, the power of the base point of the energy storage resource is set as the rated discharge power; and when the current electric quantity ratio is not lower than the low electric quantity ratio and not higher than the high electric quantity ratio, the base point power of the energy storage resource is set to be 0.
7. The power frequency control method of the energy storage resource power system according to claim 1, wherein the specific method for adjusting the energy storage resource according to the control target of the energy storage resource is as follows:
and presetting a command dead zone, when the deviation between the control target of the energy storage resource and the real-time power of the energy storage resource exceeds the command dead zone, generating a control instruction according to the control target of the energy storage resource, and sending the control instruction to the energy storage controller for energy storage resource adjustment.
8. An energy storage resource power system power frequency control system, comprising:
the information acquisition module is used for acquiring the regional control deviation of the control region and the control performance strategy adjustment requirement;
the adjusting requirement determining module is used for obtaining the adjusting requirement of the control area according to the area control deviation and the adjusting requirement of the control performance strategy; and
and the energy storage resource adjusting module is used for obtaining a control target of the energy storage resource by combining the preset energy storage resource base point power according to the adjusting interval to which the adjusting requirement of the control area belongs, and adjusting the energy storage resource according to the control target of the energy storage resource.
9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the energy storage resource power system power frequency control method of any one of claims 1 to 7 when executing the computer program.
10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the energy storage resource power system power frequency control method of any of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718061.7A CN111769576A (en) | 2020-07-23 | 2020-07-23 | Method, system, device and medium for controlling power frequency of energy storage resource electric power system |
| CN202011080140.6A CN112039093B (en) | 2020-07-23 | 2020-10-10 | Method, system, device and medium for controlling power frequency of energy storage resource electric power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718061.7A CN111769576A (en) | 2020-07-23 | 2020-07-23 | Method, system, device and medium for controlling power frequency of energy storage resource electric power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111769576A true CN111769576A (en) | 2020-10-13 |
Family
ID=72727111
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010718061.7A Pending CN111769576A (en) | 2020-07-23 | 2020-07-23 | Method, system, device and medium for controlling power frequency of energy storage resource electric power system |
| CN202011080140.6A Active CN112039093B (en) | 2020-07-23 | 2020-10-10 | Method, system, device and medium for controlling power frequency of energy storage resource electric power system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011080140.6A Active CN112039093B (en) | 2020-07-23 | 2020-10-10 | Method, system, device and medium for controlling power frequency of energy storage resource electric power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN111769576A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653196A (en) * | 2020-12-09 | 2021-04-13 | 中国南方电网有限责任公司 | Power system power generation side standby resource scheduling method, system, device and medium |
| CN116599090A (en) * | 2023-07-18 | 2023-08-15 | 北京中电普华信息技术有限公司 | Power adjustment method, device and computer readable medium based on energy storage resource |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117335454A (en) * | 2023-09-04 | 2024-01-02 | 国网湖北省电力有限公司随州供电公司 | Method and system for energy storage configuration in source network and charge storage integrated regional power grid |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873004A (en) * | 2010-06-13 | 2010-10-27 | 国电南瑞科技股份有限公司 | Unified coordination AGC (Automatic Generation Control) control method of interconnected network |
| CN103151801B (en) * | 2012-02-14 | 2015-04-08 | 国电南瑞科技股份有限公司 | Automatic gain control (AGC) unit coordination control method based on fire-water power joint optimization scheduling |
| CN103746408B (en) * | 2014-01-28 | 2018-06-15 | 北京科东电力控制系统有限责任公司 | Large-scale wind power AGC control method for coordinating |
| CN105529748B (en) * | 2016-01-11 | 2018-05-04 | 中国南方电网有限责任公司 | A kind of automatic power generation control method suitable for Power System Dynamic Simulation |
| CN106712117B (en) * | 2017-01-03 | 2019-03-19 | 国电南瑞科技股份有限公司 | The interconnected network two-level scheduler AGC coordinated control system and method shared based on ACE |
| CN108092324B (en) * | 2017-12-20 | 2022-02-08 | 国电南瑞科技股份有限公司 | AGC control system and control method for wind power participating in peak shaving frequency modulation |
| CN109004641A (en) * | 2018-07-19 | 2018-12-14 | 南京南瑞继保电气有限公司 | A kind of microgrid source net lotus control method for coordinating based on energy source optimization scheduling |
| CN110021930B (en) * | 2019-02-15 | 2022-10-11 | 国电南瑞科技股份有限公司 | Large-scale energy storage participation power grid partition control method and system |
-
2020
- 2020-07-23 CN CN202010718061.7A patent/CN111769576A/en active Pending
- 2020-10-10 CN CN202011080140.6A patent/CN112039093B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112653196A (en) * | 2020-12-09 | 2021-04-13 | 中国南方电网有限责任公司 | Power system power generation side standby resource scheduling method, system, device and medium |
| CN112653196B (en) * | 2020-12-09 | 2023-04-18 | 中国南方电网有限责任公司 | Power system power generation side standby resource scheduling method, system, device and medium |
| CN116599090A (en) * | 2023-07-18 | 2023-08-15 | 北京中电普华信息技术有限公司 | Power adjustment method, device and computer readable medium based on energy storage resource |
| CN116599090B (en) * | 2023-07-18 | 2023-09-19 | 北京中电普华信息技术有限公司 | Power adjustment method, device and computer readable medium based on energy storage resource |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112039093A (en) | 2020-12-04 |
| CN112039093B (en) | 2022-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112039093B (en) | Method, system, device and medium for controlling power frequency of energy storage resource electric power system | |
| CN113517706B (en) | Primary frequency modulation coordination control method, system, equipment and storage medium for wind storage system | |
| CN110768273B (en) | Control method for energy storage combined thermal power participation power grid secondary frequency modulation | |
| US10389165B2 (en) | Energy management apparatus, energy management method and program recording medium | |
| CN108933451B (en) | Microgrid system, microgrid central controller thereof and power distribution control method | |
| CN111416367B (en) | Energy storage multi-scene application cooperative control method | |
| CN108695871B (en) | Configuration method for reducing energy storage capacity requirement of island micro-grid containing power spring | |
| US10141742B2 (en) | System and method for providing a balancing power for an electrical power grid | |
| WO2022252382A1 (en) | Source-grid-load-storage networked coordinated frequency control method | |
| CN110535119B (en) | Energy storage power station time interval electric quantity rolling control method adaptive to power grid peak regulation and frequency modulation | |
| CN109617103B (en) | Energy control method and system for gradient utilization energy storage battery of energy storage unit | |
| CN111276987A (en) | Electric energy storage control method and device of energy storage system | |
| CN108197755A (en) | A kind of Unit Combination Optimization Scheduling a few days ago for considering large receiving-end grid primary frequency modulation performance | |
| CN115514101A (en) | Power distribution method and device for energy storage power station | |
| CN112821416A (en) | Fire storage combined frequency modulation energy storage power distribution method | |
| CN115719979A (en) | Source load storage coordination control method and system for off-grid operation of new energy microgrid | |
| CN115528748A (en) | Method, device, equipment and medium for configuring electric power tight balance state | |
| WO2023108384A1 (en) | Comprehensive identification index-based energy storage multi-scenario application switching control method | |
| CN114498773A (en) | Control method and device for participating in APC frequency modulation of master station by adjustable load | |
| CN112886623A (en) | Energy storage converter VSG mode energy management coordination control method and system | |
| CN110601234A (en) | Energy storage power station power coordination control method and system | |
| CN115001001A (en) | Novel power system source load and storage master-slave game optimization method | |
| CN114123257A (en) | Day-ahead scheduling method considering energy storage power constraint | |
| He et al. | A Coordinated Consensus Control Strategy for Distributed Battery Energy Storages Considering Different Frequency Control Demands | |
| CN112910016A (en) | Frequency modulation control method for power distribution network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201013 |