CN112260297B - Double-bus grid-connected energy storage system management method, device, equipment and medium - Google Patents

Double-bus grid-connected energy storage system management method, device, equipment and medium Download PDF

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Publication number
CN112260297B
CN112260297B CN202011158640.7A CN202011158640A CN112260297B CN 112260297 B CN112260297 B CN 112260297B CN 202011158640 A CN202011158640 A CN 202011158640A CN 112260297 B CN112260297 B CN 112260297B
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working condition
circuit breaker
bus
controller
energy storage
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CN112260297A (en
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许泽阳
夏耀杰
杨杰
余德启
叶东挺
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Shanghai Electric Distributed Energy Technology Co ltd
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Shanghai Electric Distributed Energy Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management

Abstract

The application discloses a method, a device, equipment and a medium for managing a double-bus grid-connected energy storage system, which are used for solving the problem that no solution is available in the prior art for controlling the operation of a double-bus system. In the embodiment of the application, the last state and the current state of the third breaker are obtained; if the third circuit breaker meets the preset condition, respectively instructing the first controller and the second controller to execute shutdown operation; the preset conditions are that the last state is an open state and the current state is a closed state; if the third circuit breaker does not meet the preset condition, acquiring the working condition type represented by the current states of the third circuit breaker, the first circuit breaker and the second circuit breaker; and according to the type of the working condition, instructing the first controller and/or the second controller to execute corresponding operation. Because the specific working condition type can be identified based on the monitoring of the working condition, and the corresponding operation and maintenance operation is executed, the unmanned operation and maintenance of the double-bus grid-connected energy storage system can be realized.

Description

Double-bus grid-connected energy storage system management method, device, equipment and medium
Technical Field
The application relates to the technical field of information processing, in particular to a method, a device, equipment and a medium for managing a double-bus grid-connected energy storage system.
Background
With the development of power grid technology, an energy storage system gradually becomes an indispensable link in a power network, and is increasingly applied to power grid frequency modulation, peak clipping and valley filling, demand regulation, power grid power fluctuation suppression and the like.
The inventor finds that a double-bus energy storage power grid has special requirements on operation, and a targeted design is required according to actual operation requirements, and no solution is provided for controlling the operation of a double-bus system in the related art.
Disclosure of Invention
The application provides a data storage method, a data storage device, an electronic device and a data storage medium based on a key value system, so as to at least solve the problem that no solution exists in the prior art on how to control the operation of a double-bus system. The technical scheme of the application is as follows:
according to a first aspect of an embodiment of the present application, a method for managing a double-bus grid-connected energy storage system is provided, where the double-bus includes a first bus and a second bus, the first bus is provided with a first circuit breaker, a first energy storage power station and a first controller, the second bus is provided with a second circuit breaker, a second energy storage power station and a second controller, and a third circuit breaker is provided between the first bus and the second bus, the method includes:
acquiring the last state and the current state of the third circuit breaker;
if the third circuit breaker meets a preset condition, respectively instructing the first controller and the second controller to execute shutdown operation; the preset conditions are that the last state is an open state and the current state is a closed state;
if the third circuit breaker does not meet the preset condition, acquiring the working condition type represented by the current states of the third circuit breaker, the first circuit breaker and the second circuit breaker;
and instructing the first controller and/or the second controller to execute corresponding operations according to the working condition type.
In some embodiments, the instructing the first controller and/or the second controller to perform the corresponding operation according to the operating condition type includes:
if the working condition type is a first working condition, acquiring estimated power consumption sum of the first bus and the second bus; and instructing the first controller to perform: controlling the discharge following load of the first energy storage power station to be set as a difference value between the sum of the electricity consumption and a first specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station to be smaller than the estimated electricity consumption power of the first bus when charging; while instructing the second controller to perform: controlling a discharge following load of the second energy storage power station to be set as a difference value between the sum of the electricity consumption and the first specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station to be smaller than the estimated electricity consumption power of the second bus when charging; the first working condition is that the third circuit breaker, the first circuit breaker and the second circuit breaker are all in a closed state;
if the working condition type is a second working condition, the first controller is instructed to execute: controlling the discharge following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and a second specified power consumption of the first bus during discharging, and simultaneously controlling the charging power of the first energy storage power station during charging to be smaller than the estimated power consumption of the first bus; the second specified power is smaller than the first specified power, the second working condition is that the second circuit breaker is in an open state, and the first circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a third working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power for charging the second energy storage power station to be smaller than the estimated power consumption of the second bus; the third working condition is that the first circuit breaker is in an open state, and the second circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a fourth working condition or an eighth working condition, respectively instructing the first controller and the second controller to carry out shutdown operation; the fourth working condition is that the first circuit breaker and the second circuit breaker are both in an open state, and the third circuit breaker is in a closed state; the eighth working condition is that the first circuit breaker, the second circuit breaker and the third circuit breaker are all in an off state;
if the working condition type is a fifth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform: controlling the discharging following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the second bus; the fifth working condition is that the first circuit breaker and the second circuit breaker are both in a closed state, and the switch is in an open state;
if the working condition type is a sixth working condition, the first controller is instructed to execute the following steps: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform shutdown operation; the sixth working condition is that the second circuit breaker and the third circuit breaker are both in an open state, and the first circuit breaker is in a closed state;
if the working condition type is a seventh working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the first controller to perform shutdown operation; the seventh working condition is that the first circuit breaker and the third circuit breaker are both in an open state, and the second circuit breaker is in a closed state.
In some embodiments, the method further comprises:
respectively determining the estimated electric power of the bus according to the following method aiming at any bus of the first bus and the second bus:
periodically acquiring the actual power consumption in each monitoring period;
and adopting the maximum value of the obtained actual power consumption in each monitoring period as the estimated power consumption of the bus.
In some embodiments, the sum of the individual monitoring periods is less than the specified monitoring duration.
In some embodiments, the method further comprises:
when any working condition in the first working condition set jumps to a working condition in the second working condition set, ending the operation;
responding to the user operation of restarting and starting, and returning to execute the step of obtaining the last state and the current state of the third breaker on the tie line;
the first working condition set comprises any one of the fifth working condition, the sixth working condition, the seventh working condition and the eighth working condition;
the second set of operating conditions includes the first operating condition, the second operating condition, the third operating condition, and the fourth operating condition.
In some embodiments, before instructing the first controller and/or the second controller to perform the corresponding operation according to the operating condition type, the method further includes:
and if at least one of the first controller and the second controller is determined to have a fault, indicating the controller with the fault to perform shutdown operation.
In a second aspect, the embodiment of the present application further provides a double-bus grid-connected energy storage system management device, including first bus and second bus in the double-bus, be equipped with first circuit breaker, first energy storage power station and first controller on the first bus, be equipped with second circuit breaker, second energy storage power station and second controller on the second bus, first bus with be equipped with the third circuit breaker between the second bus, the device includes:
the acquisition module is used for acquiring the last state and the current state of the third circuit breaker;
the indicating module is used for respectively indicating the first controller and the second controller to execute shutdown operation if the third circuit breaker meets the preset condition; the preset conditions are that the last state is an open state and the current state is a closed state;
the working condition type determining module is used for acquiring the working condition types represented by the current states of the third circuit breaker, the first circuit breaker and the second circuit breaker if the third circuit breaker does not meet the preset condition;
the indicating module is further used for indicating the first controller and/or the second controller to execute corresponding operation according to the working condition type.
In some embodiments, the indication module is specifically configured to:
if the working condition type is a first working condition, acquiring estimated power consumption sum of the first bus and the second bus; and instructing the first controller to perform: controlling the discharge following load of the first energy storage power station to be set as a difference value between the sum of the electricity consumption and a first specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station to be smaller than the estimated electricity consumption power of the first bus when charging; while instructing the second controller to perform: controlling a discharge following load of the second energy storage power station to be set as a difference value between the sum of the electricity consumption and the first specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station to be smaller than the estimated electricity consumption power of the second bus when charging; the first working condition is that the third circuit breaker, the first circuit breaker and the second circuit breaker are all in a closed state;
if the working condition type is a second working condition, the first controller is instructed to execute: controlling the discharge following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and a second specified power consumption of the first bus during discharging, and simultaneously controlling the charging power of the first energy storage power station during charging to be smaller than the estimated power consumption of the first bus; the second specified power is smaller than the first specified power, the second working condition is that the second circuit breaker is in an open state, and the first circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a third working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power for charging the second energy storage power station to be smaller than the estimated power consumption of the second bus; the third working condition is that the first circuit breaker is in an open state, and the second circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a fourth working condition or an eighth working condition, respectively indicating the first controller and the second controller to carry out shutdown operation; the fourth working condition is that the first circuit breaker and the second circuit breaker are both in an open state, and the third circuit breaker is in a closed state; the eighth working condition is that the first circuit breaker, the second circuit breaker and the third circuit breaker are all in an off state;
if the working condition type is a fifth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the second bus; the fifth working condition is that the first circuit breaker and the second circuit breaker are both in a closed state, and the switch is in an open state;
if the working condition type is a sixth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform shutdown operation; the sixth working condition is that the second circuit breaker and the third circuit breaker are both in an open state, and the first circuit breaker is in a closed state;
if the working condition type is a seventh working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the first controller to perform shutdown operation; the seventh working condition is that the first circuit breaker and the third circuit breaker are both in an open state, and the second circuit breaker is in a closed state.
In some embodiments, the apparatus further comprises:
the estimation module is used for determining the estimated electric power of the bus according to the following devices for any one of the first bus and the second bus:
periodically acquiring the actual power consumption in each monitoring period;
and adopting the maximum value of the obtained actual power consumption in each monitoring period as the estimated power consumption of the bus.
In some embodiments, the sum of the individual monitoring periods is less than the specified monitoring duration.
In some embodiments, the indication module is further to:
when any working condition in the first working condition set jumps to a working condition in the second working condition set, ending the operation;
responding to the user operation of restarting and starting, and returning to execute the step of obtaining the last state and the current state of the third breaker on the tie line;
the first working condition set comprises any one of the fifth working condition, the sixth working condition, the seventh working condition and the eighth working condition;
the second set of operating conditions includes the first operating condition, the second operating condition, the third operating condition, and the fourth operating condition.
In some embodiments, the instruction module is further configured to, before instructing the first controller and/or the second controller to perform corresponding operations according to the operating condition type, instruct, if it is determined that at least one of the first controller and the second controller fails, the failed controller to perform a shutdown operation.
According to a third aspect of embodiments herein, there is provided an electronic device comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the data storage method based on the key-value system according to any one of the first aspect of the embodiments of the present application.
According to a fourth aspect of the embodiments of the present application, a non-volatile readable storage medium is provided, and when a computer program electronic device in the storage medium is executed, the electronic device is enabled to execute the dual bus grid-connected energy storage system management method according to any one of the first aspect of the embodiments of the present application.
According to a fifth aspect of the embodiments of the present application, a computer program product is provided, which, when running on an electronic device, causes the electronic device to execute a method for managing a dual-bus grid-connected energy storage system according to any one of the first aspect and the first aspect of the embodiments of the present application.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects: specific working condition types can be identified based on monitoring of working conditions, corresponding operation and maintenance operations are executed, and unmanned operation and maintenance of the double-bus grid-connected energy storage system can be achieved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.
Fig. 1 is a schematic diagram of a dual bus grid-connected energy storage system according to an exemplary embodiment.
Fig. 2 is a schematic flow chart illustrating a method for managing a dual-bus grid-connected energy storage system according to an exemplary embodiment.
FIG. 3 is a schematic diagram illustrating one type of operating condition according to an exemplary embodiment.
Fig. 4 is another schematic flow diagram illustrating a method for managing a dual bus grid-connected energy storage system according to an exemplary embodiment.
Fig. 5 is another flow chart of a method for managing a dual bus grid-connected energy storage system according to an exemplary embodiment.
Fig. 6 is an explanatory diagram illustrating a method for managing a dual bus grid-connected energy storage system according to an exemplary embodiment.
Fig. 7 is a schematic flow chart of a method for managing a dual bus grid-connected energy storage system according to an exemplary embodiment.
Fig. 8 is a schematic structural diagram of a management device of a dual-bus grid-connected energy storage system according to an exemplary embodiment.
FIG. 9 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
In order to make the technical solutions of the present application better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of this application 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 should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The application scenario described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not form a limitation on the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems. Wherein, in the description of the present application, the meaning of "a plurality" unless otherwise indicated.
Based on how to realize unmanned operation and maintenance of a double-bus system, at present, no reasonable scheme is provided, and the application provides a double-bus grid-connected energy storage system management method, device, electronic equipment and medium. In the method, a breaker is arranged in each bus of the double buses, and a connecting line is arranged between the two buses, so that corresponding operation and maintenance strategies can be formulated and executed according to the working condition types of the breaker and the connecting line, and unmanned operation and maintenance are realized.
In addition, in order to prevent the energy storage reverse power from surfing the internet, a load following allowance is added, and the actual following load is obtained by subtracting the set allowance from the load power.
The following describes a management method of a dual-bus grid-connected energy storage system according to the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a dual-bus grid-connected energy storage system according to an embodiment of the present application, the energy storage system includes a first bus L1 and a second bus L2, a first circuit breaker 301, a first energy storage power station C1 and a first controller SCS1 are disposed on the first bus L1, and a second circuit breaker 302, a second energy storage power station C2 and a second controller SCS2 are disposed on the second bus L2; a third breaker 300 is provided as a tie line between the first bus bar L1 and the second bus bar L2.
Electric equipment is arranged on each of the first bus L1 and the second bus L2. When the first breaker 301 is closed, the power is supplied to the electric device through the first bus L1, and when the first breaker C1301 is opened, the first bus cannot supply the power to the electric device. Similarly, when the second circuit breaker 302 is closed, the power is supplied to the electric equipment through the second bus L2, and when the second circuit breaker 302 is opened, the second bus cannot supply the power to the electric equipment. Of course, the electric devices provided on the first bus bar L1 and the second bus bar L2 may be the same or different, and different meanings include completely different or partially different. The method can be configured according to actual requirements, and the embodiment of the application is not limited to this.
In order to meet the requirement of saving electricity cost or dealing with abnormal conditions, the energy storage power stations on the first bus L1 and the second bus L2 can store electric energy. When the cost is high or power is cut off, the energy storage power station discharges electricity, and the electricity is provided for the electric equipment through the corresponding bus. Wherein the first energy storage substation C1 is charged and discharged through the first bus L1, and the second energy storage substation C2 is charged and discharged through the second bus L2.
In some embodiments, for example, the energy storage device can properly discharge when the electricity price is high, and the proper energy storage when the electricity price is low can not only help users to save cost, but also can reasonably manage and utilize the energy storage power station.
The management method for the double-bus grid-connected energy storage system provided by the embodiment of the application can be executed by any controller (such as a first controller or a second controller) on the double bus, and can also be provided with electronic equipment capable of communicating with the first controller and the second controller, such as an FPGA (Field Programmable Gate Array), a terminal device with processing capability, and the like. And the function of managing the double-bus grid-connected energy storage system can be called as unmanned operation and maintenance function hereinafter. This function may allow for manual start-up or shut-down (i.e., ending unattended operation and maintenance), and, in some cases, may be automatically shut-down or restarted depending on the circumstances.
As shown in fig. 2, a schematic flow diagram of a management method of a dual-bus grid-connected energy storage system according to an embodiment of the present application includes the following steps:
in step 201, a last state and a current state of the third breaker are obtained;
in step 202, if the third circuit breaker meets a preset condition, respectively instructing the first controller and the second controller to execute a shutdown operation; the preset conditions are that the last state is an open state and the current state is a closed state;
in step 203, if the third circuit breaker does not satisfy the preset condition, acquiring a working condition type represented by the current states of the third circuit breaker, the first circuit breaker and the second circuit breaker;
in step 204, the first controller and/or the second controller are instructed to perform corresponding operations according to the type of the working condition.
Therefore, in the embodiment of the application, when the third circuit breaker meets the preset condition, it is indicated that a fault occurs and maintenance is needed, so that control over the energy storage system can be suspended, the first controller and the second controller are controlled to be shut down, energy consumption is saved, and unnecessary operation management in the first controller and the second controller is avoided. In addition, when no fault exists, when unmanned operation and maintenance are required to be carried out on the first controller and the second controller, corresponding instructions can be issued according to actual working condition types so as to realize reasonable unmanned operation and maintenance operation according to actual power grid environments.
In some embodiments, based on the respective states of the first circuit breaker, the second circuit breaker and the third circuit breaker, a total of 8 operating conditions can be divided, as shown in fig. 3, which is a schematic diagram of different operating conditions. Wherein, 8 kinds of operating modes include:
a first working condition: under the working condition, the third circuit breaker, the first circuit breaker and the second circuit breaker are all in a closed state;
the second working condition is as follows: under the working condition, the second circuit breaker is in an open state, and the first circuit breaker and the third circuit breaker are both in a closed state;
the third working condition is as follows: under the working condition, the first circuit breaker is in an open state, and the second circuit breaker and the third circuit breaker are both in a closed state;
the fourth working condition: under the working condition, the first circuit breaker and the second circuit breaker are both in an open state, and the third circuit breaker is in a closed state;
a fifth working condition: under the working condition, the first circuit breaker and the second circuit breaker are both in a closed state, and the switch is in an open state;
a sixth working condition: under the working condition, the second circuit breaker and the third circuit breaker are both in an open state, and the first circuit breaker is in a closed state;
the seventh working condition: under the working condition, the first circuit breaker and the third circuit breaker are both in an open state, and the second circuit breaker is in a closed state;
the eighth working condition: under this operating condition, the first circuit breaker, the second circuit breaker and the third circuit breaker are all in the off-state.
Unmanned operation and maintenance under each working condition can be controlled according to estimated power consumption demand, so that reasonable management and control can be carried out on the energy storage power station according to actual demands.
The power demand can be described according to the situations of different buses, for example, as shown in fig. 4, the method for determining the estimated power consumption (i.e. the power demand) of each bus according to the following method for any bus of the first bus and the second bus comprises the following steps:
step 401: periodically acquiring actual power consumption in each monitoring period;
step 402: and adopting the maximum value of the obtained actual power consumption in each monitoring period as the estimated power consumption of the bus.
In a monitoring period, the power of the bus is sampled, the sampled power is accumulated, and the accumulated value is divided by the sampling times to obtain the actual average power consumption in the monitoring period.
For example, assuming that one monitoring period is every 15 minutes, the average power usage is calculated, and further, assuming that one month is one total monitoring period, the maximum average power usage per month may be newly counted. In practice, the starting point of one month may be set according to the user's requirement, for example, 25 # 10/month is the starting point of a total monitoring period. As shown in fig. 5, a schematic flow chart for determining the estimated power consumption of the bus is as follows:
in step 501, it is checked whether the current time is the starting point of a total monitoring period, i.e. point 25 and 10, if yes, step 502 is executed, otherwise step 503 is executed.
Step 502: and resetting the recorded maximum power utilization.
Step 503: and determining whether the timing duration of the timer is less than the monitoring period of 15 minutes, if so, executing step 504, otherwise, executing step 505.
Step 504: and accumulating the sampling power of the bus in the current monitoring period.
Step 505: and keeping the accumulated value of the sampling power in the current monitoring period at the sampling times to obtain the actual power consumption of the current monitoring period.
Step 506: and comparing the actual power consumption of the current monitoring period with the recorded maximum actual power consumption, if the actual power consumption of the current monitoring period is greater than the recorded maximum actual power consumption, executing the step 507, otherwise, keeping the maximum actual power consumption unchanged.
Step 507: and setting the actual power utilization power of the current monitoring period as the maximum actual power utilization power.
Thus, the dynamic rolling calculation of the maximum actual power usage over a total monitoring period (e.g., one month) can be combined with historical and accurate estimates of the power usage.
When the first controller and the second controller are instructed to perform control, the corresponding control may be performed based on the estimated power consumption. Before instructing the first controller and/or the second controller to execute corresponding operations according to the working condition types, if at least one of the first controller and the second controller is determined to have a fault, instructing the faulty controller to perform shutdown operation. Assuming that the controller on the bus where the breaker in the closed state is located is in the power-on operation state, according to the type of the operating condition, the first controller and/or the second controller is instructed to perform corresponding operations, as shown in fig. 6, which may be implemented as:
1) if the working condition type is a first working condition, acquiring estimated power consumption sum of the first bus and the second bus; and respectively sending instructions to the first controller and the second controller, wherein:
(1) instructing the first controller to perform: controlling a discharge following load of the first energy storage power station to be set as a difference value between the sum of the power consumption and the first specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus;
(2) while instructing the second controller to perform: and controlling the discharge following load of the second energy storage power station to be set as a difference value between the sum of the power consumption and the first specified power during discharging, and simultaneously controlling the charging power of the second energy storage power station during charging to be smaller than the estimated power consumption of the second bus.
In addition, in the application, in view of the fact that the controller has time delay in response, in order to prevent the energy storage reverse power from being on line, a load following allowance (namely first designated power) is added, and the actual following load is the load power minus the following amount allowance. Under each subsequent working condition, the idea is referred to, and the load following allowance is realized to prevent the energy storage reverse power from surfing the Internet.
2) And if the working condition type is the second working condition, indicating the first controller to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power consumption when discharging, and simultaneously controlling the charging power of the first energy storage power station to be smaller than the estimated power consumption of the first bus when charging; wherein the second specified power is less than the first specified power; for example, the first specified power may be twice the second specified power.
3) And if the working condition type is a third working condition, indicating the second controller to execute: controlling the discharge following load of the second energy storage power station to be set as the difference value of the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power for charging the second energy storage power station to be smaller than the estimated power consumption of the second bus;
4) if the working condition type is a fourth working condition or an eighth working condition, respectively instructing the first controller and the second controller to carry out shutdown operation;
5) if the working condition type is a fifth working condition:
instructing the first controller to perform: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power consumption when discharging, and simultaneously controlling the charging power of the first energy storage power station to be smaller than the estimated power consumption of the first bus when charging;
instructing the second controller to perform: controlling the discharge following load of the second energy storage power station to be set as the difference value of the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power when charging the second energy storage power station to be smaller than the estimated power consumption of the second bus;
6) if the working condition type is a sixth working condition:
instructing the first controller to perform: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power consumption when discharging, and simultaneously controlling the charging power of the first energy storage power station to be smaller than the estimated power consumption of the first bus when charging;
instructing the second controller to perform shutdown operation;
7) if the working condition type is a seventh working condition:
instructing the second controller to perform: controlling the discharge following load of the second energy storage power station to be set as the difference value of the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power when charging the second energy storage power station to be smaller than the estimated power consumption of the first bus;
and instructing the first controller to perform shutdown operation.
In summary, in the face of different working conditions, reasonable mechanisms and methods can be adopted to reasonably control different controllers, so that some basic requirements of unmanned operation and maintenance are met.
It should be noted that, in the operation process of the unmanned operation and maintenance, after the instruction is obtained, the instruction may be generated and sent to the corresponding controller, and the controller receives the instruction and then operates the instruction according to the self condition. For example, when the first energy storage power station is currently in a discharging stage, the first controller corresponding to the first energy storage power station may control the first energy storage power station to execute the corresponding instruction according to the instruction for discharging, for example, the first controller may call the communication issuing interface to issue the corresponding instruction to the first energy storage power station to execute.
Of course, whether the energy storage substation is to be discharged or to be charged may be determined according to actual requirements. For example, the peak value of the electricity price can be discharged, and then discharge control is performed according to the estimated electricity power of the current monitoring period by unmanned operation and maintenance, namely, the discharge load follows. Charging can be carried out at the low price of electricity, and then charging control is carried out on the estimated electricity utilization power of the current monitoring period according to unmanned operation and maintenance, namely the charging power does not exceed the estimated electricity utilization power.
In addition, in the embodiment of the present application, some special conditions may cause the operation condition to jump, for example, from the fifth operation condition to the first operation condition. In order to cope with the fault possibly caused by the special condition, the first working condition set may be defined in the embodiment of the present application to include any one of a fifth working condition, a sixth working condition, a seventh working condition, and an eighth working condition; the second set of operating conditions includes a first operating condition, a second operating condition, a third operating condition, and a fourth operating condition. When any working condition in the first working condition set jumps to a working condition in the second working condition set, the unmanned operation and maintenance finishes the operation; then, if the user manually starts the unmanned operation and maintenance, the step of acquiring the last state and the current state of the third circuit breaker on the tie line can be returned to be executed in response to the user operation of restarting the starting.
For any of the first to third circuit breakers, it is assumed that 0 represents an open state and 1 represents a closed state. Then, the following describes, with reference to fig. 7, a method for managing a dual-bus grid-connected energy storage system according to an embodiment of the present application, including the following steps:
step 701: when unmanned operation and maintenance are started, the last state and the current state of the third circuit breaker are obtained, and if the third circuit breaker is started for the first time, the last state is set to be 1.
Step 702: judging whether the third circuit breaker meets a preset condition, namely the last state is an open state and the current state is a closed state; if yes, go to step A1, otherwise go to step 703.
Step A1: and respectively instructing the first controller and the second controller to execute shutdown operation.
Step A2: and D, judging whether the first controller and the second controller are both powered off, if so, executing the step A3, otherwise, executing the step A4.
Step A3: after the last state of the third circuit breaker is set to 0, the exit operation is performed.
Wherein, the device can be restarted periodically after each exit. The recorded previous state is available for comparison with the acquired current state at the next boot to facilitate execution of step 702.
Step A4: and after the last state of the third breaker is set as the current state value, returning to execute the step 701.
Step 703: and judging whether the current working condition type is the fourth working condition or the eighth working condition, if so, executing step A1, otherwise, executing step 704.
Step 704: and judging whether the current state of the third breaker is an open state, namely 0, if so, executing the step B1, otherwise, executing the step C1.
Step B1: whether the first circuit breaker and the second circuit breaker are in an open state is identified, and whether a controller fault exists is identified.
Step B2: and if the first circuit breaker is in an off state or the first controller has a fault, indicating the first controller to execute a fault shutdown process.
Step B3: and if the second circuit breaker is in an off state or the second controller has a fault, indicating the second controller to execute a fault shutdown process.
Step B4: and in the first controller and the second controller, determining whether the target controller is in a power-on state or not for the target circuit breaker which is in a closed state and has no controller fault, if not, executing the step B5, and if so, executing the step B6.
Step B5: and controlling the target controller to enter a fault shutdown process.
Step B6: and identifying the type of the working condition.
Step B7: and processing according to the operation corresponding to the working condition type.
For example, when the operating condition type is the fifth operating condition, the first controller load is instructed to follow the difference between the predicted power consumption and the set allowance, and the second controller load is instructed to follow the difference between the predicted power consumption and the set allowance.
And when the working condition type is a sixth working condition, controlling the first controller to follow the difference between the estimated power consumption and the set allowance, and controlling the discharge load to follow according to the charge demand according to the peak-valley electricity price.
And when the working condition type is a seventh working condition, controlling the second controller to carry out load following on the difference between the estimated power consumption and the set allowance, and carrying out charging demand control and discharging load following according to the peak-valley electricity price.
Step C1: and respectively judging whether the first controller and the second controller have a fault, if so, executing the step C2, otherwise, executing the step C3 on the controller without the fault.
Step C2: and instructing the controller with the fault to enter a fault shutdown process.
Step C3: and continuously judging whether the controller without the fault is in a starting state, if not, executing a step C4, and if so, executing a step B6, namely identifying the type of the working condition and executing corresponding operation according to the type of the working condition.
Step C4: and indicating the controller to enter a starting process.
For example, when the type of the operating condition is the first operating condition, the respective loads of the first controller and the second controller are controlled to follow the difference between the sum of the predicted power consumption and the set margin of 2 times. Otherwise, the operation and maintenance operation under the second working condition or the third working condition is executed.
Based on the same inventive concept, an embodiment of the present application further provides a dual-bus grid-connected energy storage system management device, where the dual-bus includes a first bus and a second bus, the first bus is provided with a first circuit breaker, a first energy storage power station and a first controller, the second bus is provided with a second circuit breaker, a second energy storage power station and a second controller, and a third circuit breaker is arranged between the first bus and the second bus, as shown in fig. 8, the device includes:
an obtaining module 801, configured to obtain a last state and a current state of the third circuit breaker;
an indicating module 802, configured to respectively instruct the first controller and the second controller to execute a shutdown operation if the third circuit breaker meets a preset condition; the preset conditions are that the last state is an open state and the current state is a closed state;
a working condition type determining module 803, configured to obtain a working condition type represented by current states of the third circuit breaker, the first circuit breaker, and the second circuit breaker if the third circuit breaker does not satisfy the preset condition;
the indicating module is further used for indicating the first controller and/or the second controller to execute corresponding operations according to the working condition types.
In some embodiments, the indication module is specifically configured to:
if the working condition type is a first working condition, acquiring estimated power consumption sum of the first bus and the second bus; and instructing the first controller to perform: controlling the discharge following load of the first energy storage power station to be set as a difference value between the sum of the electricity consumption and a first specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station to be smaller than the estimated electricity consumption power of the first bus when charging; while instructing the second controller to perform: controlling a discharge following load of the second energy storage power station to be set as a difference value between the sum of the electricity consumption and the first specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station to be smaller than the estimated electricity consumption power of the second bus when charging; the first working condition is that the third circuit breaker, the first circuit breaker and the second circuit breaker are all in a closed state;
if the working condition type is a second working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and a second specified power when discharging, and simultaneously controlling the charging power when charging the first energy storage power station to be smaller than the estimated power consumption of the first bus; the second specified power is smaller than the first specified power, and the second working condition is that the second circuit breaker is in an open state, and the first circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a third working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power for charging the second energy storage power station to be smaller than the estimated power consumption of the second bus; the third working condition is that the first circuit breaker is in an open state, and the second circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a fourth working condition or an eighth working condition, respectively indicating the first controller and the second controller to carry out shutdown operation; the fourth working condition is that the first circuit breaker and the second circuit breaker are both in an open state, and the third circuit breaker is in a closed state; the eighth working condition is that the first circuit breaker, the second circuit breaker and the third circuit breaker are all in an off state;
if the working condition type is a fifth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the second bus; the fifth working condition is that the first circuit breaker and the second circuit breaker are both in a closed state, and the switch is in an open state;
if the working condition type is a sixth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform shutdown operation; the sixth working condition is that the second circuit breaker and the third circuit breaker are both in an open state, and the first circuit breaker is in a closed state;
if the working condition type is a seventh working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the first controller to perform shutdown operation; and the seventh working condition is that the first circuit breaker and the third circuit breaker are both in an open state, and the second circuit breaker is in a closed state.
In some embodiments, the apparatus further comprises:
the estimation module is used for determining the estimated electric power of the bus according to the following devices for any one of the first bus and the second bus:
periodically acquiring the actual power consumption in each monitoring period;
and adopting the maximum value of the obtained actual power consumption in each monitoring period as the estimated power consumption of the bus.
In some embodiments, the sum of the individual monitoring periods is less than the specified monitoring duration.
In some embodiments, the indication module is further to:
when any working condition in the first working condition set jumps to a working condition in the second working condition set, ending the operation;
responding to the user operation of restarting and starting, and returning to execute the step of obtaining the last state and the current state of the third breaker on the tie line;
the first working condition set comprises any one of the fifth working condition, the sixth working condition, the seventh working condition and the eighth working condition;
the second set of operating conditions includes the first operating condition, the second operating condition, the third operating condition, and the fourth operating condition.
In some embodiments, the instruction module is further configured to, before instructing the first controller and/or the second controller to perform corresponding operations according to the operating condition type, instruct, if it is determined that at least one of the first controller and the second controller fails, the failed controller to perform a shutdown operation.
With regard to the apparatus in the above-described embodiment, the specific manner in which each unit executes the request has been described in detail in the embodiment related to the method, and will not be elaborated here.
After introducing the dual bus grid-connected energy storage system management method and apparatus of an exemplary embodiment of the present disclosure, a computing device according to another exemplary embodiment of the present disclosure is introduced next.
As will be appreciated by one skilled in the art, aspects of the present disclosure may be embodied as a system, method or program product. Accordingly, various aspects of the present disclosure may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
In some possible implementations, a computing device according to the present disclosure may include at least one processor, and at least one memory. The memory stores program code that, when executed by the processor, causes the processor to perform the steps of the dual bus grid-connected energy storage system management method according to various exemplary embodiments of the present disclosure described above in this specification. For example, the processor may perform steps as in a dual bus grid-tied energy storage system management method.
The computing device 130 according to this embodiment of the disclosure is described below with reference to fig. 9. The computing device 130 shown in fig. 9 is only one example and should not impose any limitations on the functionality or scope of use of embodiments of the disclosure.
As shown in fig. 9, computing device 130 is embodied in the form of a general purpose computing device. Components of computing device 130 may include, but are not limited to: the at least one processor 131, the at least one memory 132, and a bus 133 that connects the various system components (including the memory 132 and the processor 131).
Bus 133 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a processor, or a local bus using any of a variety of bus architectures.
The memory 132 may include readable media in the form of volatile memory, such as Random Access Memory (RAM)1321 and/or cache memory 1322, and may further include Read Only Memory (ROM) 1323.
Memory 132 may also include programs/utilities 1325 having a set (at least one) of program modules 1324, such program modules 1324 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
Computing device 130 may also communicate with one or more external devices 134 (e.g., keyboard, pointing device, etc.), with one or more devices that enable a user to interact with computing device 130, and/or with any devices (e.g., router, modem, etc.) that enable computing device 130 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 135. Also, computing device 130 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) via network adapter 136. As shown, network adapter 136 communicates with other modules for computing device 130 over bus 133. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with computing device 130, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
In some possible embodiments, the aspects of a dual bus grid-connected energy storage system management method provided by the present disclosure may also be implemented in the form of a program product, which includes program code for causing a computer device to perform the steps of a dual bus grid-connected energy storage system management method according to various exemplary embodiments of the present disclosure described above in this specification, when the program product is run on the computer device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The program product for a dual bus grid-connected energy storage system management method of embodiments of the present disclosure may employ a portable compact disk read-only memory (CD-ROM) and include program code, and may be run on a computing device. However, the program product of the present disclosure is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In situations involving remote computing devices, the remote computing devices may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to external computing devices (e.g., through the internet using an internet service provider).
It should be noted that although in the above detailed description several units or sub-units of the apparatus are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functions of two or more units described above may be embodied in one unit, in accordance with embodiments of the present disclosure. Conversely, the features and functions of one unit described above may be further divided into embodiments by a plurality of units.
Further, while the operations of the disclosed methods are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure 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 so forth) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. 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.
While preferred embodiments of the present disclosure have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various changes and modifications can be made in the present disclosure without departing from the spirit and scope of the disclosure. Thus, it is intended that the present disclosure also encompass such modifications and variations as fall within the scope of the claims and their equivalents.

Claims (14)

1. The double-bus grid-connected energy storage system management method is characterized in that the double buses comprise a first bus and a second bus, a first circuit breaker, a first energy storage power station and a first controller are arranged on the first bus, a second circuit breaker, a second energy storage power station and a second controller are arranged on the second bus, a third circuit breaker is arranged between the first bus and the second bus, and the method comprises the following steps:
acquiring the last state and the current state of the third circuit breaker;
if the third circuit breaker meets a preset condition, respectively instructing the first controller and the second controller to execute shutdown operation; the preset conditions are that the last state is an open state and the current state is a closed state;
if the third circuit breaker does not meet the preset condition, acquiring the working condition type represented by the current states of the third circuit breaker, the first circuit breaker and the second circuit breaker;
and instructing the first controller and/or the second controller to execute corresponding operations according to the working condition type.
2. The method of claim 1, wherein instructing the first controller and/or the second controller to perform respective operations according to the operating condition type comprises:
if the working condition type is a first working condition, acquiring estimated power consumption sum of the first bus and the second bus; and, instructing the first controller to perform: controlling the discharge following load of the first energy storage power station to be set as a difference value between the sum of the power consumption and first specified power during discharging, and simultaneously controlling the charging power during charging of the first energy storage power station to be smaller than the estimated power consumption of the first bus; while instructing the second controller to perform: controlling a discharge following load of the second energy storage power station to be set as a difference value between the sum of the electricity consumption and the first specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station to be smaller than the estimated electricity consumption power of the second bus when charging; the first working condition is that the third circuit breaker, the first circuit breaker and the second circuit breaker are all in a closed state;
if the working condition type is a second working condition, the first controller is instructed to execute: controlling the discharge following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and a second specified power consumption of the first bus during discharging, and simultaneously controlling the charging power of the first energy storage power station during charging to be smaller than the estimated power consumption of the first bus; the second specified power is smaller than the first specified power, and the second working condition is that the second circuit breaker is in an open state, and the first circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a third working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power for charging the second energy storage power station to be smaller than the estimated power consumption of the second bus; the third working condition is that the first circuit breaker is in an open state, and the second circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a fourth working condition or an eighth working condition, respectively indicating the first controller and the second controller to carry out shutdown operation; the fourth working condition is that the first circuit breaker and the second circuit breaker are both in an open state, and the third circuit breaker is in a closed state; the eighth working condition is that the first circuit breaker, the second circuit breaker and the third circuit breaker are all in an off state;
if the working condition type is a fifth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the second bus; the fifth working condition is that the first circuit breaker and the second circuit breaker are both in a closed state, and the switch is in an open state;
if the working condition type is a sixth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform shutdown operation; the sixth working condition is that the second circuit breaker and the third circuit breaker are both in an open state, and the first circuit breaker is in a closed state;
if the working condition type is a seventh working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the first controller to perform shutdown operation; the seventh working condition is that the first circuit breaker and the third circuit breaker are both in an open state, and the second circuit breaker is in a closed state.
3. The method of claim 2, further comprising:
respectively determining the estimated electric power of the bus according to the following method aiming at any bus of the first bus and the second bus:
periodically acquiring actual power consumption in each monitoring period;
and adopting the maximum value of the obtained actual power consumption in each monitoring period as the estimated power consumption of the bus.
4. The method of claim 3, wherein the sum of the individual monitoring periods is less than a specified monitoring duration.
5. The method according to any one of claims 2-4, further comprising:
when any working condition in the first working condition set jumps to a working condition in the second working condition set, ending the operation;
responding to the user operation of restarting and starting, and returning to execute the step of acquiring the last state and the current state of the third breaker on the tie line;
the first working condition set comprises any one of the fifth working condition, the sixth working condition, the seventh working condition and the eighth working condition;
the second set of operating conditions includes the first operating condition, the second operating condition, the third operating condition, and the fourth operating condition.
6. The method of claim 1, wherein prior to instructing the first controller and/or the second controller to perform the respective operation according to the operating condition type, the method further comprises:
and if at least one of the first controller and the second controller is determined to have a fault, indicating the controller with the fault to perform shutdown operation.
7. The utility model provides a double bus energy storage system management device that is incorporated into power networks, a serial communication port, including first generating line and second generating line in the double bus, be equipped with first circuit breaker, first energy storage power station and first controller on the first generating line, be equipped with second circuit breaker, second energy storage power station and second controller on the second generating line, first generating line with be equipped with the third circuit breaker between the second generating line, the device includes:
the acquisition module is used for acquiring the last state and the current state of the third breaker;
the indicating module is used for respectively indicating the first controller and the second controller to execute shutdown operation if the third circuit breaker meets a preset condition; the preset conditions are that the last state is an open state and the current state is a closed state;
the working condition type determining module is used for acquiring the working condition types represented by the current states of the third circuit breaker, the first circuit breaker and the second circuit breaker if the third circuit breaker does not meet the preset condition;
the indicating module is further used for indicating the first controller and/or the second controller to execute corresponding operation according to the working condition type.
8. The apparatus according to claim 7, wherein the indication module is specifically configured to:
if the working condition type is a first working condition, acquiring estimated power consumption sum of the first bus and the second bus; and instructing the first controller to perform: controlling the discharge following load of the first energy storage power station to be set as a difference value between the sum of power consumption and first specified power during discharging, and simultaneously controlling the charging power of the first energy storage power station during charging to be smaller than the estimated power consumption of the first bus; while instructing the second controller to perform: controlling a discharge following load of the second energy storage power station to be set as a difference value between the sum of the electricity consumption and the first specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station to be smaller than the estimated electricity consumption power of the second bus when charging; the first working condition is that the third circuit breaker, the first circuit breaker and the second circuit breaker are all in a closed state;
if the working condition type is a second working condition, the first controller is instructed to execute: controlling the discharge following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and a second specified power consumption of the first bus during discharging, and simultaneously controlling the charging power of the first energy storage power station during charging to be smaller than the estimated power consumption of the first bus; the second specified power is smaller than the first specified power, and the second working condition is that the second circuit breaker is in an open state, and the first circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a third working condition, the second controller is instructed to execute: controlling the discharging following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power for charging the second energy storage power station to be smaller than the estimated power consumption of the second bus; the third working condition is that the first circuit breaker is in an open state, and the second circuit breaker and the third circuit breaker are both in a closed state;
if the working condition type is a fourth working condition or an eighth working condition, respectively indicating the first controller and the second controller to carry out shutdown operation; the fourth working condition is that the first circuit breaker and the second circuit breaker are both in an open state, and the third circuit breaker is in a closed state; the eighth working condition is that the first circuit breaker, the second circuit breaker and the third circuit breaker are all in an off state;
if the working condition type is a fifth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the second bus; the fifth working condition is that the first circuit breaker and the second circuit breaker are both in a closed state, and the switch is in an open state;
if the working condition type is a sixth working condition, the first controller is instructed to execute: controlling the discharging following load of the first energy storage power station to be set as a difference value between the estimated power consumption of the first bus and the second specified power when discharging, and simultaneously controlling the charging power of the first energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the second controller to perform shutdown operation; the sixth working condition is that the second circuit breaker and the third circuit breaker are both in an open state, and the first circuit breaker is in a closed state;
if the working condition type is a seventh working condition, the second controller is instructed to execute: controlling the discharge following load of the second energy storage power station to be set as a difference value between the estimated power consumption of the second bus and the second specified power when discharging, and simultaneously controlling the charging power of the second energy storage power station when charging to be smaller than the estimated power consumption of the first bus; and instructing the first controller to perform shutdown operation; the seventh working condition is that the first circuit breaker and the third circuit breaker are both in an open state, and the second circuit breaker is in a closed state.
9. The apparatus of claim 8, further comprising:
the estimation module is used for determining the estimated electric power of the bus according to the following devices for any one of the first bus and the second bus:
periodically acquiring actual power consumption in each monitoring period;
and adopting the obtained maximum value of the actual electric power in each monitoring period as the estimated electric power of the bus.
10. The apparatus of claim 9, wherein the sum of the individual monitoring periods is less than a specified monitoring duration.
11. The apparatus of any of claims 8-10, wherein the indication module is further configured to:
when any working condition in the first working condition set jumps to a working condition in the second working condition set, ending the operation;
responding to the user operation of restarting and starting, and returning to execute the step of acquiring the last state and the current state of the third breaker on the tie line;
the first working condition set comprises any one of the fifth working condition, the sixth working condition, the seventh working condition and the eighth working condition;
the second set of operating conditions includes the first operating condition, the second operating condition, the third operating condition, and the fourth operating condition.
12. The device according to claim 7, wherein the indicating module is further configured to, before instructing the first controller and/or the second controller to perform the corresponding operation according to the operating condition type, instruct the failed controller to perform a shutdown operation if it is determined that at least one of the first controller and the second controller fails.
13. An electronic device, comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the dual bus grid-connected energy storage system management method of any of claims 1-6.
14. A storage medium storing a computer program, wherein the computer program in the storage medium, when executed by a processor of an electronic device, enables the electronic device to perform the dual bus grid-connected energy storage system management method according to any one of claims 1 to 6.
CN202011158640.7A 2020-10-26 2020-10-26 Double-bus grid-connected energy storage system management method, device, equipment and medium Active CN112260297B (en)

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