CN112531890A - Main/standby switching method and switching device for energy storage coordination controller - Google Patents
Main/standby switching method and switching device for energy storage coordination controller Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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Abstract
The invention relates to a main/standby switching method and a switching device of an energy storage coordination controller and the energy storage coordination controller comprising the main/standby switching device, and the influence of the communication link state on the coordination control capability of the device is considered when the main/standby switching is implemented. The energy storage coordination controller is connected and interacted with the EMS and the PCS from top to bottom to realize steady-state control and dynamic control of the whole station; the communication state of the opposite side and the monitoring system comprehensively considers the states of the station control layer link and the process layer link, and the reliability and the accuracy of state information judgment are ensured. The main-standby switching of the two machines adds consideration to the steady-state control and power supporting capacity of the controller, so that the main machine always has the maximum regulation and control capacity in the normal operation process of the device, the power can be better supported when the power grid fluctuates, and the regulation function of energy storage can be exerted to the maximum extent.
Description
Technical Field
The invention relates to the technical field of energy storage systems of power systems, in particular to a main/standby switching method and a switching device of an energy storage coordination controller and the energy storage coordination controller comprising the switching device.
Background
At present, local networks and provincial offices in China actively lay out energy storage projects, and various manufacturers in the field actively develop key technical research and equipment development of energy storage power stations. With the rapid construction and operation of large energy storage power stations, the requirements for orderly control (including participation in primary frequency modulation and dynamic reactive power voltage regulation) of energy storage units are more and more strong, and the necessity of researching the energy storage coordination control mechanism and implementation method of the energy storage power stations is more and more urgent. The water, light and wind multi-energy complementary integration optimization demonstration engineering of the south China Qinghai Hainan state, the copper mountain power plant of the Xun Huarun and the like all put forward the requirement of configuring an energy storage coordination controller on site so as to realize the rapid control of an energy storage unit. General technical specifications of energy storage power stations are also successively released by Zhejiang electric academy and Jiangsu electric academy, and specific requirements of coordination control are provided. Fig. 1 shows a System architecture and information flow of an energy storage coordination controller, and as shown in fig. 1, the energy storage coordination controller is located between an EMS energy storage monitoring System and an energy storage converter (Power Conversion System, hereinafter referred to as PCS) in an energy storage Power station, and is a unique source of a PCS adjustment control command for coordinating and controlling multiple PCS of the energy storage Power station. In the operation process, the energy storage coordination controller receives and forwards an AGC/AVC instruction from the EMS to realize steady-state control, and simultaneously, telemetering information such as voltage, current, power, frequency and the like of a grid-connected point is uploaded to a monitoring system; and monitoring the voltage and frequency changes of the grid-connected point in real time, and actively implementing frequency modulation and voltage regulation dynamic control.
In order to ensure the reliability of service, the energy storage coordination controller generally adopts a double-set configuration, and when a link is interrupted or a switch is abnormal, the main and standby dual machines of the energy storage coordination controller easily lose contact with the PCS at the same time.
Disclosure of Invention
Based on the above situation in the prior art, an object of the present invention is to provide a method and a device for switching between a main system and a standby system of an energy storage coordination controller, so as to prevent the main system and the standby system of the energy storage coordination controller from losing contact with a PCS at the same time when a link is interrupted or a switch is abnormal.
In order to achieve the above object, according to an aspect of the present invention, a method for switching between a main power source and a standby power source of an energy storage coordination controller is provided, which includes:
self-checking the energy storage coordination controller to judge whether the main/standby energy storage coordination controller fails;
judging a steady-state instruction and the available state of the energy storage converter, and calculating the regulation and control capability of the energy storage coordination controller according to the available state;
judging whether the standby energy storage coordination controller is automatically upgraded to a main energy storage coordination controller or not according to the self-checking result;
and comparing the regulation and control capabilities of the main energy storage coordination controller and the standby energy storage coordination controller to judge whether the standby energy storage coordination controller is optimized and upgraded to the main energy storage coordination controller.
Further, the regulation and control capability of the energy storage coordination controller is calculated and determined according to the following formula:
C＝α·Cems+β·Cpcs
wherein C is the regulation and control capability of the energy storage coordination controller, Cems、CpcsThe energy storage coordination controller is respectively the steady-state regulation and control capability and the power support capability of the energy storage coordination controller, alpha and beta are respectively corresponding weight coefficients, alpha + beta is 1, and alpha<β。
Furthermore, in the formula for calculating the regulation and control capability of the energy storage coordination controller,
Cemsdetermined by the communication state of the energy storage coordination controller and the EMS, when the energy storage coordination controller and the EMS are in normal communication, Cems1 is ═ 1; when the communication between the energy storage coordination controller and the EMS is interrupted, Cems＝0；
CpcsThe total power of the current available energy storage converter and the total power of the total station energy storage converter are determined as follows:
wherein m is the number of the current available energy storage converters, n is the total number of the energy storage converters in the total station, and Px1+Px2+…+PxmFor the total power of the currently available energy-storing converters, Ppcs1+Ppcs2+…+PpcsnThe total power of the total station energy storage converter is obtained; when m is 0 and all the energy storage converters are not adjustable, the steady-state instruction can not be forwarded to the energy storage converters, and at the moment, CemsIs set to 0.
Further, the comparing the regulation and control capabilities of the main energy storage coordination controller and the standby energy storage coordination controller to judge whether to optimize and upgrade the standby energy storage coordination controller to the main energy storage coordination controller comprises the following steps:
when the main energy storage coordination controller detects that the regulation and control capability of the main energy storage coordination controller is smaller than that of the standby energy storage coordination controller and the standby energy storage coordination controller is in an available state, the main energy storage coordination controller automatically lowers to the standby energy storage coordination controller;
and when the auxiliary energy storage coordination controller detects that the regulation and control capability of the auxiliary energy storage coordination controller is greater than that of the main energy storage coordination controller and the main energy storage coordination controller is switched to the auxiliary energy storage coordination controller, the auxiliary energy storage coordination controller is automatically upgraded to the main energy storage coordination controller.
Further, when the difference value of the regulation and control capacities between the main energy storage coordination controller and the standby energy storage coordination controller exceeds a preset threshold value CthAnd then, switching between the main energy storage coordination controller and the standby energy storage coordination controller is carried out.
According to a second aspect of the present invention, a main/standby switching device of an energy storage coordination controller is provided, which includes a self-checking module, a judging module, a processing module, and a switching module; wherein,
the self-checking module is used for carrying out self-checking on the energy storage coordination controller so as to judge whether the main/standby energy storage coordination controller fails;
the judging module is used for judging a steady-state instruction and the available state of the energy storage converter;
the processing module is used for calculating the regulation and control capability of the energy storage coordination controller according to the available state judgment result output by the judgment module;
the switching module judges whether the standby energy storage coordination controller is automatically upgraded to the main energy storage coordination controller according to the result output by the self-checking module; and judging whether the standby energy storage coordination controller is optimized and upgraded to the main energy storage coordination controller according to the regulation and control capability calculation result output by the processing module.
Further, the processing module calculates the regulation and control capability of the energy storage coordination controller according to the following formula:
C＝α·Cems+β·Cpcs
wherein C is the regulation and control capability of the energy storage coordination controller, Cems、CpcsThe energy storage coordination controller is respectively the steady-state regulation and control capability and the power support capability of the energy storage coordination controller, alpha and beta are respectively corresponding weight coefficients, alpha + beta is 1, and alpha<β。
Furthermore, in the formula for calculating the regulation and control capability of the energy storage coordination controller,
Cemsdetermined by the communication state of the energy storage coordination controller and the EMS, when the energy storage coordination controller and the EMS are in normal communication, Cems1 is ═ 1; when the communication between the energy storage coordination controller and the EMS is interrupted, Cems＝0；
CpcsThe total power of the current available energy storage converter and the total power of the total station energy storage converter are determined as follows:
wherein,m is the number of the current available energy storage converters, n is the total number of the energy storage converters in the total station, Px1+Px2+…+PxmFor the total power of the currently available energy-storing converters, Ppcs1+Ppcs2+…+PpcsnThe total power of the total station energy storage converter is obtained; when m is 0 and all the energy storage converters are not adjustable, the steady-state instruction can not be forwarded to the energy storage converters, and at the moment, CemsIs set to 0.
Further, the switching module executes the following steps to judge whether to optimally upgrade the standby energy storage coordination controller to the main energy storage coordination controller:
when the main energy storage coordination controller detects that the regulation and control capability of the main energy storage coordination controller is smaller than that of the standby energy storage coordination controller, and the difference value of the regulation and control capabilities of the main energy storage coordination controller and the standby energy storage coordination controller exceeds a preset threshold value CthWhen the main energy storage coordination controller is in the available state, the main energy storage coordination controller is automatically switched to the standby energy storage coordination controller;
when the auxiliary energy storage coordination controller detects that the regulation and control capability of the auxiliary energy storage coordination controller is larger than that of the main energy storage coordination controller, and the difference value of the regulation and control capabilities of the auxiliary energy storage coordination controller and the main energy storage coordination controller exceeds a preset threshold value CthAnd when the main energy storage coordination controller is switched to the standby energy storage coordination controller, the standby energy storage coordination controller is automatically increased to be the main energy storage coordination controller.
According to a third aspect of the present invention, there is provided an energy storage coordination controller, including the active/standby switching device of the energy storage coordination controller according to the second aspect of the present invention.
In summary, the present invention provides a primary/standby switching method and a switching device for an energy storage coordination controller, and an energy storage coordination controller including the primary/standby switching device, in which the influence of the communication link state on the device coordination control capability is considered when performing the primary/standby switching. The energy storage coordination controller is connected and interacted with the EMS and the PCS from top to bottom to realize steady-state control and dynamic control of the whole station; the communication state of the opposite side and the monitoring system comprehensively considers the states of the station control layer link and the process layer link, and the reliability and the accuracy of state information judgment are ensured. The main-standby switching of the two machines adds consideration to the steady-state control and power supporting capacity of the controller, so that the main machine always has the maximum regulation and control capacity in the normal operation process of the device, the power can be better supported when the power grid fluctuates, and the regulation function of energy storage can be exerted to the maximum extent.
Drawings
FIG. 1 is a system architecture and information flow diagram of an energy storage coordination controller;
FIG. 2 is an information flow diagram of an energy storage coordination controller;
FIG. 3 is a flowchart illustrating an embodiment of a method for switching between a master and a slave in an energy storage coordination controller according to the present invention;
FIG. 4 is a schematic diagram of PCS allowable adjustment decision logic in the active-standby switching method of the energy storage coordination controller according to the present invention;
fig. 5 is a schematic structural diagram of the main/standby switching device of the energy storage coordination controller according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. Firstly, the working principle of the energy storage coordination controller is introduced, fig. 2 shows an information flow diagram of the energy storage coordination controller, and the energy storage coordination controller has four communication links to the outside: a process layer GOOSE interactive link, a process layer GOOSE control link, a station control layer GOOSE link and a station control layer MMS link. Wherein, the GOOSE interactive link of the process layer is used for mutual monitoring of the information of the working states of the two machines; the process layer GOOSE control link is used for issuing a PCS control instruction to realize power control on each PCS; the station control layer GOOSE link is used for heartbeat transmission; and the station control layer MMS link is used for receiving steady-state instructions of the monitoring system. Two groups of switching value information are shared between the two machines: the opening amount is 2, namely the device Fault opening contact Fault and the device Power-off opening contact Power-down are provided, wherein the device Fault opening contact is a normally open contact, when the device self-tests that the hardware is abnormal, the contact is closed, the device Power-off opening contact is a normally closed contact, and under the condition of Power failure of the device, the node is closed; the input amount is 2, namely the fault input of the opposite side device and the power failure input of the opposite side device are respectively connected with the fault input and the power failure input of the opposite side device.
In order to ensure that a main energy storage coordination controller (hereinafter referred to as a "host") has the maximum regulation and control capability and optimize coordination control of an energy storage power station, according to an embodiment of the present invention, a method for switching between main and standby energy storage coordination controllers is provided, and an implementation flowchart of the method is shown in fig. 3, and includes the following steps:
s1: after the electrification is finished, the device periodically performs self-checking, detects whether hardware faults occur in the device, and simultaneously monitors the change of the working state of the device on the opposite side.
S2: the device monitors the state of the GOOSE link of the station control layer and judges whether the heartbeat is interrupted or not.
S3: the device monitors the state of the MMS link of the station control layer and judges the on-off state of the local and monitoring system.
S4: the device judges the communication state of the opposite side and the monitoring system according to the heartbeat state and the communication state of the side and the monitoring system.
S5: the device judges the available state of the steady-state instruction and the available state of the PCS according to the communication state with the EMS and the working state of the PCS.
S6: the device calculates the regulation and control capability of the device according to the steady-state command available state and the PCS available state. Wherein the regulatory capacity of the device is determined by the following formula:
C＝α·Cems+β·Cpcs
wherein C is the regulation and control capability of the energy storage coordination controller, Cems、CpcsThe energy storage coordination controller is respectively the steady-state regulation and control capability and the power support capability of the energy storage coordination controller, alpha and beta are respectively corresponding weight coefficients, alpha + beta is 1, and alpha<β；CemsDetermined by the communication state of the energy storage coordination controller and the EMS, when the energy storage coordination controller and the EMS are in normal communication, Cems1 is ═ 1; when the communication between the energy storage coordination controller and the EMS is interrupted, Cems＝0；CpcsThe total power of the current available PCS and the total power of the total station PCSRate determination, i.e.
In the formula, m is the number of the current available energy storage converters, n is the total number of the energy storage converters in the whole station, and Px1+Px2+…+PxmFor the total power of the currently available energy-storing converters, Ppcs1+Ppcs2+…+PpcsnThe total power of the total station energy storage converter is obtained; when m is 0 and all the energy storage converters are not adjustable, the steady-state instruction can not be forwarded to the energy storage converters, and at the moment, CemsIs set to 0.
S6: the automatic main-lifting device monitors the working states of the device and the opposite side device in real time, and when the device on the opposite side is detected to be overhauled, faulted or power-off and is in a non-main state, if the device on the side has no faults and is overhauled, the device is automatically lifted as a main machine.
S7: and optimizing the master-slave device to calculate in real time and compare the regulation and control capabilities of the two machines. When the host detects that the regulation and control capability of the host is smaller than that of a standby energy storage coordination controller (hereinafter referred to as a standby machine) and exceeds a preset threshold, and meanwhile, the standby machine has no fault and no maintenance and is in an available state, the host automatically drops to the standby machine; and the standby machine detects that the regulation and control capability of the standby machine is greater than that of the host machine and exceeds a preset threshold value, and the host machine is automatically upgraded to the host machine when the host machine is switched to the standby machine. In order to avoid frequent switching of the main and standby machines, a switching threshold value Cth is preset, and switching of the main and standby machines is performed only when the difference of the regulation and control capabilities between the main and standby machines is greater than the switching threshold value Cth and the standby machine has a main-up condition.
In order to ensure the communication reliability and acquire the working state of the opposite device as quickly and accurately as possible, the double-set configured devices exchange state information in a direct optical fiber connection mode, and important information such as device faults, device power failure and the like are mutually accessed to each other in a hard contact mode, so that the influence of communication interference on the judgment of the working state of the double devices is reduced. The device in the maintenance state or the fault state can not be used as a host machine or a standby machine and is in a non-main non-standby state. After the device detects that the opposite side device is powered off through the hard contact, the working state of the opposite side device is set to be a fault state.
In order to accurately acquire the communication state of the contralateral device and the monitoring system. When the GOOSE interactive link of the process layer is normal, the communication state between the opposite side and the monitoring system is obtained through mutual transmission of the GOOSE interactive link of the process layer; when the GOOSE interactive link of the process layer is interrupted, the local side judges the communication state of the opposite side and the monitoring system through the heartbeat state and the communication state of the local side and the monitoring system. And when the heartbeat is interrupted and the communication between the opposite side and the monitoring system is normal, judging that the communication between the opposite side and the monitoring system is interrupted.
Further, the determination of the available state of the PCS is implemented according to the logic shown in fig. 4, which is related to the states of whether the device is operating normally, the shutdown state, the GOOSE interrupt, and the like.
According to a second embodiment of the present invention, a main/standby switching device of an energy storage coordination controller is provided, a schematic configuration diagram of the main/standby switching device is shown in fig. 5, and the switching device includes a self-checking module, a judging module, a processing module, and a switching module.
The self-checking module mainly completes the functions of AD self-checking, power self-checking, open circuit disconnection and other hardware self-checking and master-slave machine running state monitoring, and provides a basis for master-slave state switching.
The judging module is mainly used for judging whether a steady-state instruction is available or not according to the connection state of the device and the EMS; and judging whether the PCS is available or not according to the working state of the PCS and the state of the communication link.
The processing module calculates the regulation and control capability of the device according to the output result of the judging module and outputs the comparison result of the regulation and control capabilities of the main machine and the standby machine to the switching module.
The switching module determines whether to perform the main-standby switching or not according to the output results of the self-checking module and the processing module, and completes the corresponding switching process.
The specific processes of implementing the respective functions by the modules are the same as the steps of the method for switching between the main and standby energy storage coordination controllers provided in the first embodiment of the present invention, and are not described herein again.
According to a third embodiment of the present invention, an energy storage coordination controller is provided, where the energy storage coordination controller includes the active/standby switching device of the energy storage coordination controller according to the second embodiment of the present invention.
In summary, the present invention relates to a primary/secondary switching method and a switching device for an energy storage coordination controller, and an energy storage coordination controller including the primary/secondary switching device, wherein the primary/secondary switching is controlled by using key state data of the controller, and the interaction is performed in a manner of optical fiber direct connection and hard contact, so as to ensure accuracy and reliability of interaction state information; the communication state of the opposite side and the monitoring system comprehensively considers the states of the station control layer link and the process layer link, and the reliability and the accuracy of state information judgment are ensured. The consideration of the steady-state control and the power supporting capability of the device is innovatively added in the active-standby switching of the two machines, so that the main machine always has the maximum regulation and control capability in the normal operation process of the device, the power can be better supported when the power grid fluctuates, and the regulation function of energy storage is exerted to the maximum extent.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A method for switching between main and standby energy storage coordination controllers is characterized by comprising the following steps:
self-checking the energy storage coordination controller to judge whether the main/standby energy storage coordination controller fails;
judging a steady-state instruction and the available state of the energy storage converter, and calculating the regulation and control capability of the energy storage coordination controller according to the available state;
judging whether the standby energy storage coordination controller is automatically upgraded to a main energy storage coordination controller or not according to the self-checking result;
and comparing the regulation and control capabilities of the main energy storage coordination controller and the standby energy storage coordination controller to judge whether the standby energy storage coordination controller is optimized and upgraded to the main energy storage coordination controller.
2. The active-standby switching method according to claim 1, wherein the calculation of the regulation capability of the energy storage coordination controller is determined according to the following formula:
C＝α·Cems+β·Cpcs
wherein C is the regulation and control capability of the energy storage coordination controller, Cems、CpcsThe energy storage coordination controller is respectively the steady-state regulation and control capability and the power support capability of the energy storage coordination controller, alpha and beta are respectively corresponding weight coefficients, alpha + beta is 1, and alpha<β。
3. The method according to claim 2, wherein in the formula for calculating the regulation capability of the energy storage coordination controller,
Cemsdetermined by the communication state of the energy storage coordination controller and the EMS, when the energy storage coordination controller and the EMS are in normal communication, Cems1 is ═ 1; when the communication between the energy storage coordination controller and the EMS is interrupted, Cems＝0；
CpcsThe total power of the current available energy storage converter and the total power of the total station energy storage converter are determined as follows:
wherein m is the number of the current available energy storage converters, n is the total number of the energy storage converters in the total station, and Px1+Px2+…+PxmFor the total power of the currently available energy-storing converters, Ppcs1+Ppcs2+…+PpcsnThe total power of the total station energy storage converter is obtained; when m is 0 and all the energy storage converters are not adjustable, the steady-state instruction can not be forwarded to the energy storage converters, and at the moment, CemsIs set to 0.
4. The active-standby switching method according to claim 3, wherein the comparing the regulation and control capabilities of the main energy storage coordination controller and the standby energy storage coordination controller to determine whether to upgrade the standby energy storage coordination controller to the main energy storage coordination controller includes the steps of:
when the main energy storage coordination controller detects that the regulation and control capability of the main energy storage coordination controller is smaller than that of the standby energy storage coordination controller and the standby energy storage coordination controller is in an available state, the main energy storage coordination controller automatically lowers to the standby energy storage coordination controller;
and when the auxiliary energy storage coordination controller detects that the regulation and control capability of the auxiliary energy storage coordination controller is greater than that of the main energy storage coordination controller and the main energy storage coordination controller is switched to the auxiliary energy storage coordination controller, the auxiliary energy storage coordination controller is automatically upgraded to the main energy storage coordination controller.
5. The active-standby switching method according to claim 4, wherein when the difference of the regulation and control capabilities between the active and standby energy storage coordination controllers exceeds a preset threshold CthAnd then, switching between the main energy storage coordination controller and the standby energy storage coordination controller is carried out.
6. A main and standby switching device of an energy storage coordination controller is characterized by comprising a self-checking module, a judging module, a processing module and a switching module; wherein,
the self-checking module is used for carrying out self-checking on the energy storage coordination controller so as to judge whether the main/standby energy storage coordination controller fails;
the judging module is used for judging a steady-state instruction and the available state of the energy storage converter;
the processing module is used for calculating the regulation and control capability of the energy storage coordination controller according to the available state judgment result output by the judgment module;
the switching module judges whether the standby energy storage coordination controller is automatically upgraded to the main energy storage coordination controller according to the result output by the self-checking module; and judging whether the standby energy storage coordination controller is optimized and upgraded to the main energy storage coordination controller according to the regulation and control capability calculation result output by the processing module.
7. The device according to claim 6, wherein the processing module calculates the regulation capability of the energy storage coordination controller according to the following formula:
C＝α·Cems+β·Cpcs
wherein C is the regulation and control capability of the energy storage coordination controller, Cems、CpcsThe energy storage coordination controller is respectively the steady-state regulation and control capability and the power support capability of the energy storage coordination controller, alpha and beta are respectively corresponding weight coefficients, alpha + beta is 1, and alpha<β。
8. The device according to claim 7, wherein in the formula for calculating the regulation capability of the energy storage coordination controller,
Cemsdetermined by the communication state of the energy storage coordination controller and the EMS, when the energy storage coordination controller and the EMS are in normal communication, Cems1 is ═ 1; when the communication between the energy storage coordination controller and the EMS is interrupted, Cems＝0；
CpcsThe total power of the current available energy storage converter and the total power of the total station energy storage converter are determined as follows:
wherein m is the number of the current available energy storage converters, n is the total number of the energy storage converters in the total station, and Px1+Px2+…+PxmFor the total power of the currently available energy-storing converters, Ppcs1+Ppcs2+…+PpcsnThe total power of the total station energy storage converter is obtained; when m is 0 and all the energy storage converters are not adjustable, the steady-state instruction can not be forwarded to the energy storage converters, and at the moment, CemsIs set to 0.
9. The device according to claim 8, wherein the switching module performs the following steps to determine whether to upgrade the backup energy storage coordination controller into the master energy storage coordination controller:
when the main energy storage coordination controller detects that the regulation and control capability of the main energy storage coordination controller is smaller than that of the standby energy storage coordination controller, and the difference value of the regulation and control capabilities of the main energy storage coordination controller and the standby energy storage coordination controller exceeds a preset threshold value CthWhen the main energy storage coordination controller is in the available state, the main energy storage coordination controller is automatically switched to the standby energy storage coordination controller;
when the auxiliary energy storage coordination controller detects that the regulation and control capability of the auxiliary energy storage coordination controller is larger than that of the main energy storage coordination controller, and the difference value of the regulation and control capabilities of the auxiliary energy storage coordination controller and the main energy storage coordination controller exceeds a preset threshold value CthAnd when the main energy storage coordination controller is switched to the standby energy storage coordination controller, the standby energy storage coordination controller is automatically increased to be the main energy storage coordination controller.
10. An energy storage coordination controller, characterized in that, it comprises the active-standby switching device of energy storage coordination controller according to any one of claims 6-9.
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