CN109818362B - Access control method of user-side energy storage device - Google Patents
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- CN109818362B CN109818362B CN201910228343.6A CN201910228343A CN109818362B CN 109818362 B CN109818362 B CN 109818362B CN 201910228343 A CN201910228343 A CN 201910228343A CN 109818362 B CN109818362 B CN 109818362B
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Abstract
The invention discloses an access control method of a user side energy storage device, which comprises the steps of arranging the energy storage device at the user side in a power grid, and connecting the energy storage device with the power grid and a user load; acquiring the running states and running data of a power grid and an energy storage device; and controlling the connection relation between the user side energy storage device and the power grid and the user load to realize the access control of the user side energy storage device. According to the access control method of the user side energy storage device, the energy storage device is arranged on the user side, and a set of mature and reliable access control method of the user side energy storage device is provided according to the user side load, the power grid load and the state data of the energy storage device, so that the user side energy storage device can be utilized to the maximum extent, the power grid can be ensured to run stably and reliably, and the method is scientific, reliable, simple and feasible.
Description
Technical Field
The invention particularly relates to an access control method of a user side energy storage device.
Background
With the development of economic technology and the improvement of living standard of people, electric energy becomes essential secondary energy in production and life of people, and brings endless convenience to production and life of people.
The problem of peak-valley balance of the power grid is one of the keys of reliable and stable operation of the power grid; in order to deal with the large load of the power grid during the peak period of power utilization, the power grid usually reserves a large spare load. In order to improve the operation efficiency and reliability of the power grid, it is a common scheme for the power grid to install an energy storage device at a user side. After the energy storage device is installed on the user side, when the redundant electric quantity of the power grid is generated, certain redundant energy of the power grid is consumed and stored by accessing the energy storage device on the user side, and when the power grid needs additional electric quantity supplement, certain stored electric quantity is released by the energy storage device on the user side to feed the power grid back and forth, so that the stable and reliable operation of the power grid is ensured. Meanwhile, due to the installation of the energy storage device on the user side, the situation that a user has backup energy to use when the power grid is powered off can be guaranteed, and the reliability of power supply of the user is improved.
However, in the current access control method for the energy storage device on the user side, a rough switching mode is adopted, and a dispatcher or an operator carries out manual command according to experience and the current situation, so that the access control method is very dependent on the experience of the operator, is low in reliability and is poor in scientificity.
Disclosure of Invention
The invention aims to provide a scientific and reliable access control method of a user side energy storage device, which can maximally utilize the user side energy storage device and ensure the stable and reliable operation of a power grid.
The access control method of the user side energy storage device provided by the invention comprises the following steps:
s1, arranging an energy storage device at a user side in a power grid, and connecting the energy storage device with the power grid and a user load;
s2, acquiring the running state and running data of the power grid and the running state and running data of the energy storage device at the user side;
and S3, controlling the connection relation between the user side energy storage device and the power grid and the user load according to the operation state and the operation data acquired in the step S2, and realizing the access control of the user side energy storage device.
Step S1, the energy storage device is connected to the power grid and the user load, specifically, the energy storage device is connected to the ring main unit dedicated to the energy storage device, the ring main unit dedicated to the energy storage device is connected to the user load through the first switch, and the ring main unit dedicated to the energy storage device is connected to the existing ring main unit of the power grid through the second switch.
The operation state and the operation data of the power grid and the operation state and the operation data of the energy storage device at the user side in the step S2 specifically include an energy storage charge state of the energy storage device, user load data and power grid load data.
Step S3, where the control of the connection relationship between the energy storage device on the user side and the power grid and the user load is specifically to control the connection relationship between the energy storage device on the user side and the power grid and the user load by using the following rules:
r1, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, and the user load of a user connected with the energy storage device is in a peak period, connecting and discharging the energy storage device with the user load, and participating in peak clipping application of the user side load;
r2, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, and the user load of a user connected with the energy storage device is in a low valley period, the energy storage device is connected with the user load and is charged, and the user load participates in valley filling application of the user side load;
r3, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak time period, the energy storage device is connected with the power grid, and energy recovery and balance of the energy storage device are carried out;
r4, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the power grid and discharges to participate in peak regulation application at the power grid side;
r5. when the energy storage state of charge of the energy storage device is greater than or equal to the set maximum value and the user load of the user connected with the energy storage device is in the peak time period, the energy storage device is connected with the user load and discharges to participate in the peak clipping application of the user side load;
r6. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in the low valley period, and the power grid load is in the off-peak period, the energy storage device is connected with the power grid and performs energy recovery and balance of the energy storage device;
r7. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in the low valley period and the power grid load is in the peak period, the energy storage device is connected with the power grid and discharges to participate in the peak regulation application of the power grid side;
r8. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak period, the energy storage device is connected with the power grid and performs energy recovery and balance of the energy storage device;
r9. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the power grid and discharges to participate in the peak regulation application of the power grid side;
r10, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a peak period, and the power grid load is in a non-peak period, connecting the energy storage device with the power grid and charging;
r11, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a peak period, and the power grid load is in a peak period, the energy storage device is connected with the power grid or connected with the user side load, and meanwhile, the energy storage device does not act;
r12, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak period, connecting the energy storage device with the power grid and charging;
r13, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the user side load and is charged;
and R14, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value and the user load of the user connected with the energy storage device is in a low valley period, connecting and charging the energy storage device with the user side load, and performing valley filling application of the user side load.
According to the access control method of the user side energy storage device, the energy storage device is arranged on the user side, and a set of mature and reliable access control method of the user side energy storage device is provided according to the user side load, the power grid load and the state data of the energy storage device, so that the user side energy storage device can be utilized to the maximum extent, the power grid can be ensured to run stably and reliably, and the method is scientific, reliable, simple and feasible.
Drawings
FIG. 1 is a process flow diagram of the process of the present invention.
Fig. 2 is a schematic diagram of the connection between the energy storage device at the user side and the existing power grid in the method of the present invention.
Detailed Description
FIG. 1 shows a flow chart of the method of the present invention: the access control method of the user side energy storage device provided by the invention comprises the following steps:
s1, arranging an energy storage device at a user side in a power grid, and connecting the energy storage device with the power grid and a user load; specifically, the energy storage device is connected with a ring main unit special for the energy storage device, the ring main unit special for the energy storage device is connected with a user load through a first switch, the ring main unit special for the energy storage device is connected with an existing ring main unit of a power grid through a second switch, and a schematic diagram of the ring main unit special for the energy storage device is shown in fig. 2;
s2, acquiring the running state and running data of the power grid and the running state and running data of the energy storage device at the user side; the method specifically comprises the data of the energy storage state of charge, user load data, power grid load data and the like of an energy storage device;
s3, controlling the connection relation between the user side energy storage device and the power grid and the user load according to the operation state and the operation data obtained in the step S2, and realizing access control of the user side energy storage device; specifically, the following rules are adopted to control the connection relation among the energy storage device at the user side, the power grid and the user load:
r1, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, and the user load of a user connected with the energy storage device is in a peak period, connecting and discharging the energy storage device with the user load, and participating in peak clipping application of the user side load;
r2, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, and the user load of a user connected with the energy storage device is in a low valley period, the energy storage device is connected with the user load and is charged, and the user load participates in valley filling application of the user side load;
r3, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak time period, the energy storage device is connected with the power grid, and energy recovery and balance of the energy storage device are carried out;
r4, when the energy storage charge state of the energy storage device is between the set maximum value and the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the power grid and discharges to participate in peak regulation application at the power grid side;
r5. when the energy storage state of charge of the energy storage device is greater than or equal to the set maximum value and the user load of the user connected with the energy storage device is in the peak time period, the energy storage device is connected with the user load and discharges to participate in the peak clipping application of the user side load;
r6. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in the low valley period, and the power grid load is in the off-peak period, the energy storage device is connected with the power grid and performs energy recovery and balance of the energy storage device;
r7. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in the low valley period and the power grid load is in the peak period, the energy storage device is connected with the power grid and discharges to participate in the peak regulation application of the power grid side;
r8. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak period, the energy storage device is connected with the power grid and performs energy recovery and balance of the energy storage device;
r9. when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the power grid and discharges to participate in the peak regulation application of the power grid side;
r10, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a peak period, and the power grid load is in a non-peak period, connecting the energy storage device with the power grid and charging;
r11, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a peak period, and the power grid load is in a peak period, the energy storage device is connected with the power grid or connected with the user side load, and meanwhile, the energy storage device does not act;
r12, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak period, connecting the energy storage device with the power grid and charging;
r13, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the user side load and is charged;
and R14, when the energy storage charge state of the energy storage device is smaller than or equal to the set minimum value and the user load of the user connected with the energy storage device is in a low valley period, connecting and charging the energy storage device with the user side load, and performing valley filling application of the user side load.
In specific application, the energy storage device is controlled by the PCS inverter to be connected into a power grid through a circuit breaker and a transformer, and the charging and discharging process of the battery energy storage system is controlled, so that the peak clipping and valley filling application on the user side and the peak shaving application on the power grid side are completed.
Claims (3)
1. An access control method for a user side energy storage device comprises the following steps:
s1, arranging an energy storage device at the user side in the power grid, and connecting the energy storage device with the power grid and the user load;
s2, acquiring the running state and running data of the power grid and the running state and running data of the energy storage device at the user side;
s3, controlling the connection relation between the user side energy storage device and the power grid and the user load according to the operation state and the operation data acquired in the step S2, and realizing the access control of the user side energy storage device; specifically, the following rules are adopted to control the connection relation among the energy storage device at the user side, the power grid and the user load:
r1, when the energy storage state of charge of the energy storage device is between the set maximum value and the set minimum value, and the user load of the user connected with the energy storage device is in the peak time period, the energy storage device is connected with the user load and discharges to participate in the peak clipping application of the user side load;
r2, when the energy storage state of charge of the energy storage device is between the set maximum value and the set minimum value, and the user load of the user connected with the energy storage device is in the valley period, the energy storage device is connected with the user load and is charged, and the energy storage device participates in the valley filling application of the user side load;
r3, when the energy storage state of charge of the energy storage device is between the set maximum value and the set minimum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak time period, the energy storage device is connected with the power grid, and the energy recovery and the balance of the energy storage device are carried out;
r4, when the energy storage state of charge of the energy storage device is between the set maximum value and the set minimum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the power grid and discharges to participate in the peak regulation application of the power grid side;
r5, when the energy storage charge state of the energy storage device is larger than or equal to the set maximum value and the user load of the user connected with the energy storage device is in the peak time period, the energy storage device is connected with the user load and discharges to participate in the peak clipping application of the user side load;
r6, when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of a user connected with the energy storage device is in a low valley period, and the power grid load is in a non-peak period, the energy storage device is connected with the power grid, and the energy recovery and balance of the energy storage device are carried out;
r7, when the energy storage charge state of the energy storage device is larger than or equal to the set maximum value, the user load of a user connected with the energy storage device is in a low-ebb period, and the power grid load is in a peak period, the energy storage device is connected with the power grid and discharges to participate in peak regulation application at the power grid side;
r8, when the energy storage state of charge of the energy storage device is larger than or equal to the set maximum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak time period, the energy storage device is connected with the power grid, and the energy recovery and balance of the energy storage device are carried out;
r9, when the energy storage charge state of the energy storage device is larger than or equal to the set maximum value, the user load of a user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the power grid and discharges to participate in peak regulation application at the power grid side;
r10, when the energy storage state of charge of the energy storage device is less than or equal to the set minimum value, the user load of the user connected with the energy storage device is in the peak period, and the power grid load is in the off-peak period, the energy storage device is connected with the power grid and charges;
r11, when the energy storage state of charge of the energy storage device is less than or equal to the set minimum value, the user load of the user connected with the energy storage device is in the peak period, and the power grid load is in the peak period, the energy storage device is connected with the power grid or the user side load, and the energy storage device does not act;
r12, when the energy storage state of charge of the energy storage device is less than or equal to the set minimum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a non-peak time period, the energy storage device is connected with the power grid and charges;
r13, when the energy storage state of charge of the energy storage device is less than or equal to the set minimum value, the user load of the user connected with the energy storage device is in a flat time period, and the power grid load is in a peak period, the energy storage device is connected with the user side load and is charged;
and R14, when the energy storage state of charge of the energy storage device is less than or equal to the set minimum value and the user load of the user connected with the energy storage device is in a valley period, the energy storage device is connected with the user side load and is charged, and the valley filling application of the user side load is parameterized.
2. The method according to claim 1, wherein the step S1 is performed to connect the energy storage device to a power grid and a user load, specifically, to connect the energy storage device to a ring main unit dedicated to the energy storage device, where the ring main unit dedicated to the energy storage device is connected to the user load through a first switch, and the ring main unit dedicated to the energy storage device is connected to an existing ring main unit of the power grid through a second switch.
3. The method according to claim 1, wherein the operation state and operation data of the power grid and the operation state and operation data of the user-side energy storage device in step S2 specifically include an energy storage state of charge, user load data, and grid load data of the energy storage device.
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