CN115842345B - Energy router control method and energy router - Google Patents
Energy router control method and energy router Download PDFInfo
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- CN115842345B CN115842345B CN202310071342.1A CN202310071342A CN115842345B CN 115842345 B CN115842345 B CN 115842345B CN 202310071342 A CN202310071342 A CN 202310071342A CN 115842345 B CN115842345 B CN 115842345B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention discloses an energy router control method and an energy router, wherein the control method comprises the following steps: determining the running state of the mains supply; the running state of the mains supply comprises a first state and a second state, and the mains supply is in the first state when the power is on; when the power is off, the mains supply is in a second state; determining an operation mode of the energy router according to the operation state of the mains supply; when the energy router executes the first operation mode, the energy router compares peak regulation benefits and peak valley arbitrage benefits of the power grid, and controls electric energy transmission of the energy router according to a comparison result; when the energy router executes the second operation mode, the energy router controls the electric energy transmission of the energy router according to the load power and the distributed power supply power of the power grid. Through the arrangement, the energy router is more reasonable in scheduling and controlling the source network charge storage, and the scheduling efficiency is higher.
Description
Technical Field
The invention relates to the technical field of distributed power supplies, in particular to an energy router control method and an energy router.
Background
Along with the development of production technology, green low-carbon energy gradually becomes a widely-agreed society. Photovoltaic power generation has become a mainstream trend, and distributed photovoltaic power generation is a main mode of photovoltaic power generation, and utilizes solar energy to generate power, so that generated electric energy can be distributed nearby, and pollution to the environment is reduced. The distributed power generation energy can digest energy in situ, so that the investment and the running cost of power transmission and transformation can be saved, the loss of a concentrated power transmission line can be reduced, and the reliability of power supply can be improved.
Meanwhile, the energy storage industry is rising, but the current capacity of utilizing, dispatching and allocating the distributed power supply and the distributed energy storage is insufficient, so that the dispatching and the control of the source network charge storage (distributed power supply, power grid, load and energy storage) cannot be realized, and the maximization of energy utilization and the maximization of economic benefit cannot be realized.
Disclosure of Invention
The invention aims to provide an energy router control method and an energy router, which can schedule and control the charge storage of a source network and realize the maximization of energy utilization and the maximization of economic benefit.
Based on the above object, the present invention provides
An energy router control method, comprising the steps of:
determining the running state of the mains supply; the running state of the mains supply comprises a first state and a second state, and the mains supply is in the first state when the power is on; when the power is off, the mains supply is in a second state;
determining an operation mode of the energy router according to the operation state of the mains supply; if the mains supply is in the first state, the energy router executes a first operation mode; if the commercial power is in the second state, the energy router executes a second operation mode;
when the energy router executes the first operation mode, the energy router compares peak regulation benefits and peak valley arbitrage benefits of the power grid, and controls electric energy transmission of the energy router according to a comparison result;
when the energy router executes the second operation mode, the energy router controls the electric energy transmission of the energy router according to the load power and the distributed power supply power of the power grid.
Further, when the energy router executes the second operation mode, if the load power in the power grid is greater than or equal to the distributed power supply power of the power grid, the energy storage system in the power grid transmits power to the energy router, and the output power of the energy storage system satisfies P 1 =P 2 -P 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein P is 1 For the output power of the energy storage system, P 2 For load power, P 3 Is distributed power.
Further, when the remaining available capacity of the energy storage system is smaller than or equal to the first preset capacity, the energy storage system stops transmitting power to the energy router.
Further, when the energy router executes the second operation mode, if the load power in the power grid is less than or equal to the distributed power supply power of the power grid, the energy router transmits power to the energy storage system, and the charging power of the energy storage system satisfies P 4 =P 3 -P 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein P is 4 And the charging power of the energy storage system.
Further, when the remaining available capacity of the energy storage system is greater than or equal to the second preset capacity, the energy router stops transmitting power to the energy storage system.
Further, when the energy router executes the first operation mode and the peak regulation gain of the power grid is greater than or equal to the peak valley arbitrage gain of the power grid, if the commercial power is in the valley price period, the energy router transmits the electric energy input by the commercial power to the energy storage system so as to charge the energy storage system; if the load power of the power grid is higher than the preset power, the energy storage system transmits power to the energy router so as to fill the power required by the power grid.
Further, when the energy router executes the first operation mode and the peak regulation gain of the power grid is smaller than or equal to the peak valley arbitrage gain of the power grid, if the electricity price of the commercial power in the valley price period is larger than or equal to the internet electricity price, the energy router controls the electric energy transmission of the energy router according to the electricity price period of the commercial power; wherein, the electricity price period of the commercial power comprises a valley price period and a peak price period.
An energy router, comprising:
the system comprises an energy transmission module, an interaction module, a data transmission module, a control module and a display module, wherein the energy transmission module is connected with an external power grid, a distributed power supply and a load, and can schedule the distributed power supply so as to maximize the utilization rate and economic benefit of the distributed power supply; the interaction module is used for carrying out data transmission in the energy router; the data transmission module transmits the circuit data in the energy transmission module and the running state in the energy transmission module to the interaction module; the control module controls all devices in the energy router, and the control module also controls the dispatching of the distributed power supply; the display module displays the running state, the control condition and the circuit data of all the devices in the energy router in the control interface.
Further, the energy transmission module comprises a direct current transmission unit and an alternating current transmission unit, the direct current transmission unit is connected with the alternating current transmission unit, and a current conversion device for alternating current-direct current conversion is arranged between the direct current transmission unit and the alternating current transmission unit.
Further, the direct current transmission unit is connected with an external photovoltaic system, an energy storage system, a direct current transmission device and a direct current side load; the alternating current transmission unit is connected with an external distributed power supply, an alternating current transmission device, an alternating current side load and a commercial power.
The invention provides an energy router control method and an energy router, which control the electric energy transmission of the energy router according to the running state of the mains supply, thereby realizing the maximization of the utilization rate and the maximization of the economic benefit of a distributed power supply; meanwhile, the energy router can select multiple operation modes, so that the power grid can operate more intelligently.
Drawings
FIG. 1 is a system block diagram of an energy router provided in accordance with the present invention;
FIG. 2 is a system block diagram of an energy transmission module provided in accordance with the present invention;
fig. 3 is a circuit diagram of an energy transmission module provided in accordance with the present invention;
fig. 4 is a schematic connection diagram of a first data transmission unit according to the present invention;
fig. 5 is a schematic diagram of connection of a second data transmission unit according to the present invention;
fig. 6 is a schematic diagram of connection of a third data transmission unit according to the present invention;
FIG. 7 is a schematic illustration of the connection of an adapter provided in accordance with the present invention;
FIG. 8 is a schematic diagram of a connection of an interactive module provided in accordance with the present invention;
FIG. 9 is a flow chart of an energy router control method provided in accordance with the present invention;
FIG. 10 is a flow chart of an energy router performing a second mode of operation provided in accordance with the present invention;
fig. 11 is a flow chart of an energy router according to the present invention executing a first mode of operation.
Detailed Description
The present invention will be described in detail below with reference to the specific embodiments shown in the drawings, but these embodiments are not limited to the present invention, and structural, method, or functional modifications made by those skilled in the art based on these embodiments are included in the scope of the present invention.
Fig. 1 shows an energy router 100 comprising an energy transmission module 11, a data transmission module 12, an interaction module 13, a control module 14 and a display module 15. The energy transmission module 11 is connected with an external power grid, a distributed power source and a load respectively, and the energy transmission module 11 can schedule the distributed power source so as to maximize the utilization rate and economic benefit of the distributed power source. The interaction module 13 is used for signal transmission in the energy router 100. As an implementation, the interaction module 13 may be configured as an industrial ethernet switch. Under the above arrangement mode, the interaction module 13 has good openness, high universality, low cost and flexible port configuration, and can meet more use requirements. It will be appreciated that the interaction module 13 may also be configured as a fast ethernet switch or other device, depending on the actual requirements. The data transmission module 12 is connected to the energy transmission module 11, and the data transmission module 12 is further connected to the interaction module 13, so that the circuit data and the operation state of the energy transmission module 11 are transmitted to the interaction module 13. The control module 14 is connected with the interaction module 13, and the control module 14 controls all devices in the energy router and also controls the dispatching of the distributed power supply. The display module 15 is connected to the interaction module 13, and the display module 15 is configured to display the operation status, the control status, and the circuit data of all devices in the energy router 100 in the control interface.
As shown in fig. 2, as one implementation, the energy transmission module 11 includes an ac transmission unit 111, a dc transmission unit 112, a protection unit 113, and a detection unit 114. The dc transmission unit 112 is connected to the ac transmission unit 111 to implement ac-dc conversion and transmission in the energy router 100. Specifically, a current conversion device 115 for ac-dc conversion is disposed between the dc transmission unit 112 and the ac transmission unit 111, and the current conversion device 115 can invert the dc power in the dc transmission unit 112 into ac power, and also rectify the ac power in the ac transmission unit 111 into dc power, so that the energy scheduling of the energy router 100 is more convenient. The current conversion device 115 may be configured as a bi-directional converter, an energy storage converter, or other devices. More specifically, the protection unit 113 is used to protect the circuits in the energy transmission module 11. Wherein the protection unit 113 is at least partially disposed in the dc transmission unit 112 to protect the dc side circuit of the energy router 100; the protection unit 113 is also provided at least partially in the ac transmission unit 111 to protect the ac side circuit of the energy router 100; in addition, a protection unit 113 is at least partially disposed between the dc transmission unit 112 and the ac transmission unit 111 to protect a circuit between the dc transmission unit 112 and the ac transmission unit 111. As a possible implementation, the protection unit 113 includes an intelligent circuit breaker that can be intelligently turned on and off. In this embodiment, when detecting an abnormal condition such as overvoltage, overcurrent, or short-circuit in the circuit, the protection unit 113 can automatically shut off the circuit in which the abnormality has occurred, thereby avoiding occurrence of an accident. Further, the detection unit 114 is configured to detect current data of a circuit in the energy transmission module 11. The detecting unit 114 includes a dc detecting device 1141, and the dc detecting device 1141 is at least partially disposed in the dc transmitting unit 112 to detect a dc current in the dc transmitting unit 112. As a possible embodiment, the dc detection device 1141 may be configured as a hall sensor. In this embodiment, the dc detection device 1141 detects the dc current of the dc transmission unit 112 more accurately, and does not affect the power of the circuit. It is appreciated that the dc detection device 1141 may be configured as a dc detector or other devices according to practical needs. The detection unit 114 further comprises an ac detection device 1142, the ac detection device 1142 being at least partially arranged in the ac transmission unit 111, thereby detecting the ac current in the ac transmission unit 111. As a possible embodiment, the ac detection device 1142 may be provided as a current transformer. In this embodiment, the ac detection device 1142 more stably and accurately detects the ac current of the ac transmission unit 111. It is appreciated that the ac detection device 1142 may be configured as an ac detector or other devices according to practical needs. In addition, the ac detection device 1142 is further at least partially disposed between the dc transmission unit 112 and the ac transmission unit 111 to detect an input current or an output current of the ac transmission unit 111.
As shown in fig. 3, the dc transmission unit 112 includes a dc bus 1121, and the dc bus 1121 is used to connect the respective current-carrying branch circuits of the dc transmission unit 112 together, thereby functioning to collect, distribute, and transmit dc power.
As shown in fig. 3, as an implementation manner, the dc transmission unit 112 is connected to an external photovoltaic system, so that the photovoltaic system can transmit power to the dc transmission unit 112. Specifically, the photovoltaic system is coupled to a first protector 1122, and the first protector 1122 can be configured as an arc detector or other device. The first protector 1122 is used to detect the arc of the photovoltaic system on the dc side to provide safety protection to the output of the photovoltaic system. The first protector 1122 is also connected to a maximum power point tracking controller (MPPT controller) 1123, and the MPPT controller 1123 is configured to capture the maximum power point of the photovoltaic system group string, and to stabilize the voltage of the photovoltaic system to be consistent with the voltage of the dc bus 1121. The MPPT controller 1123 is also connected to a protection unit 113, and the protection unit 113 is used to protect a circuit between the photovoltaic system and the dc bus 1121. The protection unit 113 is connected to a dc detection device 1141 for detecting a current, and the dc detection device 1141 is also connected to a dc bus 1121 to transmit output power of the photovoltaic system to the dc bus 1121.
As an implementation manner, the dc transmission unit 112 is further connected to an external energy storage system, so that the dc transmission unit 112 performs power transmission with the external energy storage system. In particular, the energy storage system is coupled to a second protection member 1124, which second protection member 1124 may be configured as a fuse or other device. When the output current of the energy storage system is excessive, the second protector 1124 is opened, thereby protecting the circuit between the energy storage system and the dc bus 1121. More specifically, the second protection component 1124 is connected to the current conversion component 1125, where the current conversion component 1125 can boost or buck the output voltage of the energy storage system until the output voltage of the energy storage system is consistent with the voltage of the dc bus 1121; likewise, the current conversion member 1125 may also boost or buck the output voltage of the dc bus 1121 until the output voltage of the dc bus 1121 coincides with the low voltage of the energy storage system to prevent reverse current transfer between the energy storage system and the dc bus 1121. The current converter 1125 may be configured as a bi-directional current transformer or other device. Further, the current conversion member 1125 is connected to the protection unit 113 to protect the circuit between the energy storage system and the dc bus 1121. Further, the protection unit 113 is connected to the dc detection device 1141, and the dc detection device 1141 is further connected to the dc bus 1121, so that power is transferred between the energy storage system and the dc bus 1121.
As an implementation manner, the dc transmission unit 112 is further connected to an external dc transmission device, so that the dc transmission unit 112 transmits power to the dc transmission device. Specifically, the dc power transmission device is connected to the protection unit 113, the protection unit 113 is connected to the dc detection device 1141, and the dc detection device 1141 is further connected to the dc bus 1121, so that the dc bus 1121 can transmit power to the dc power transmission device. Further, a third protection member 1126 is further disposed between the dc power transmission device and the dc bus 1121, the third protection member 1126 may be configured as a miniature circuit breaker, a fuse, or other structures, and the third protection member 1126 is used for performing overload protection and short-circuit protection on the circuit between the dc power transmission device and the dc bus 1121. The third protector 1126 is further connected to a fourth protector 1127, the fourth protector 1127 is grounded, and the fourth protector 1127 is used to prevent the circuit from being damaged by sudden peak current or voltage in the circuit. The fourth protector 1127 may be provided as a surge protector, a lightning arrester, or other means.
As an implementation, the dc transmission unit 112 is also connected to an external dc-side load. Specifically, the dc side load is connected to a voltage regulator 1128, and the voltage regulator 1128 may step down the current of the dc bus 1121 to supply power to the dc side load. Wherein the voltage regulator 1128 may be provided as a switching power supply. The voltage regulator 1128 is connected to the protection unit 113, the protection unit 113 is further connected to the dc detection device 1141, and the dc detection device 1141 is further connected to the dc bus 1121, so that the dc bus 1121 supplies power to the dc side load.
It will be appreciated that the above circuit is only a part of the circuits provided by the dc transmission unit 112, and the dc transmission unit 112 may also include other circuits according to actual requirements.
As shown in fig. 3, the ac transmission unit 111 includes an ac bus 1111, and the ac bus 1111 is used to connect the respective current-carrying branch circuits of the ac transmission unit 111 together, thereby functioning to collect, distribute, and transmit ac power. The ac bus 1111 is also connected to the dc bus 1121, and ac/dc conversion is performed between the ac bus 1111 and the dc bus 1121 by the current conversion device 115. As shown in fig. 4, the current conversion device 115 is also connected to an external current management system (BMS) so that the BMS controls the current conversion device 115 according to an operation state of the energy storage system.
As shown in fig. 3, as an implementation, the ac transmission unit 111 is connected to an external distributed power source, so that the distributed power source transmits power to the ac transmission unit 111. Specifically, the distributed power source is connected to a current converter 1112, and the current converter 1112 is configured to convert direct current of the distributed power source into alternating current, so that the distributed power source transmits power to the ac transmission unit 111. Wherein the current converter 1112 may be configured as an inverter. Further, the current converter 1112 is connected to the protection unit 113, the protection unit 113 is connected to the ac detection device 1142, and the ac detection device 1142 is further connected to the ac bus 1111, so that the distributed power source can transmit power to the ac bus 1111.
As one implementation, the ac transmission unit 111 is also connected to an external ac power transmission device, so that the ac transmission unit 111 transmits power to the ac power transmission device. Specifically, the ac power transmission device is connected to the protection unit 113, the protection unit 113 is connected to the ac detection device 1142, and the ac detection device 1142 is further connected to the ac bus 1111, so that the ac bus 1111 may transmit electric energy to the ac power transmission device. Further, a first protector 1113 is further disposed between the protection unit 113 and the ac power transmission device, and the first protector 1113 is used for overload protection and short-circuit protection of the circuit between the ac power transmission device and the ac bus 1111. The first protector 1113 may be configured as a miniature circuit breaker, a fuse, or other devices. Further, the first protector 1113 is further connected to a second protector 1114, the second protector 1114 is grounded, and the second protector 1114 is used for protecting against sudden peak current or voltage in the circuit. The second protector 1114 may be configured as a surge protector, a lightning arrester, or other device, among others.
As an implementation, the ac transmission unit 111 is also connected to an external ac side load, so that the ac transmission unit 111 can supply power to the external ac side load. Specifically, the ac side load is connected to the protection unit 113, the protection unit 113 is connected to the ac detection device 1142, and the ac detection device 1142 is further connected to the ac bus 1111, so that the ac bus 1111 can supply power to the ac side load.
As an implementation, the ac transmission unit 111 is also connected to the mains, so that the mains can transmit power to the ac transmission unit 111. Specifically, the mains supply is connected to a third protector 1115, and the third protector 1115 is used for isolating a circuit with rated voltage of more than 1kV, so as to protect the circuit. Wherein the third protector 1115 may be provided as an isolating switch. A fourth protector 1116 is also provided between the mains supply and the ac busbar 1111, the fourth protector 1116 being used for overload protection and short-circuit protection of the circuit. The fourth protector 1116 may be provided as a miniature circuit breaker, a fuse, or other device. The fourth protector 1116 is also connected to a fifth protector 1117, the fifth protector 1117 being grounded. When the load circuit suddenly generates a peak current or voltage due to external interference, the fifth protector 1117 can be turned on and split in a very short time to avoid damage to the load or other devices in the circuit. The fifth protector 1117 may be configured as a surge protector, a lightning arrester, or other devices. Further, the third protector 1115 is connected to the protection unit 113, the protection unit 113 is connected to the ac detection device 1142, and the ac detection device 1142 is further connected to the ac bus 1111, so that the utility power can transmit to the ac bus 1111.
It will be appreciated that the above circuit is only a part of the circuit for connecting the ac transmission unit 111 to an external device, and the ac transmission unit 111 may also include other circuits according to actual requirements.
As shown in fig. 4, as an implementation, the data transmission module 12 includes a first data transmission unit 121. Specifically, the first data transmission unit 121 is connected to the interaction module 13, so as to transmit the acquired data to the interaction module 13. Further, the first data transmission unit 121 is further connected to the dc detection device 1141 to obtain current data of each branch of the dc transmission module. The first data transmission unit 121 is further connected to an ac detection device 1142 disposed between the dc transmission unit 112 and the ac transmission unit 111, so as to obtain current data input or output by the ac transmission unit 111 to the dc transmission unit 112. The first data transmission unit 121 is also connected to the current conversion device 115 and the current conversion member 1125, respectively, to acquire the operation state of the current conversion device 115 and the operation state of the current conversion member 1125. The first data transmission unit 121 is further connected to the MPPT controller 1123 and the first protector 1122, respectively, to obtain an operation state of the MPPT controller 1123 and an operation state of the first protector 1122.
As shown in fig. 5, as an implementation, the data transmission module 12 further includes a second data transmission unit 122. Specifically, the second data transmission unit 122 is connected to the interaction module 13, so as to transmit the acquired data to the interaction module 13. Further, the second data transmission unit 122 is connected to the ac detection device 1142 to obtain current data of each branch of the ac transmission unit 111. The second data transmission unit 122 is further connected to the dc-side load and the ac-side load, respectively, to obtain an operation state of the dc-side load and an operation state of the ac-side load. The second data transmission unit 122 is further connected to the current converter 1112 to obtain an operation state of the current converter 1112.
As shown in fig. 5 and 6, as an implementation, the data transmission module 12 further includes a third data transmission unit 123. Specifically, the third data transmission unit 123 is connected to the interaction module 13 to transmit the acquired data to the interaction module 13. Further, the third data transmission unit 123 is connected to the protection unit 113 to acquire the operation state of the protection unit 113. As shown in fig. 6 and 7, the third data transmission unit 123 further connects the fourth protector 1127, the second protector 1114, the third protector 1115, and the fifth protector 1117 through the adapter 124, respectively, to obtain the operating states of the second protector 1114, the third protector 1115, the fourth protector 1127, and the fifth protector 1117. In addition, an alarm device 16 is also provided within the energy router 100. Specifically, the alarm device 16 includes a first alarm 161, where the first alarm 161 is configured to detect whether the energy router 100 is water-in, and if so, the first alarm 161 sends a water immersion alarm signal to the third data transmission unit 123. The alarm device 16 further includes a second alarm 162, where the second alarm 162 is configured to detect a smoke concentration in the energy router 100, and when the smoke concentration is too high, the second alarm 162 sends a smoke alarm signal to the third data transmission unit 123. The alarm device 16 further includes a third alarm 163, where the third alarm 163 is configured to detect a temperature and humidity in the energy router 100, and when the temperature and humidity in the energy router 100 is too high, the third alarm 163 sends a temperature and humidity alarm signal to the third data transmission unit 123. Further, the third data transmission unit 123 transmits the water immersion warning signal, the smoke warning signal or the temperature and humidity warning signal to the interaction module 13. It will be appreciated that the alert device 16 may also be provided with other alerts, depending on the actual needs.
As shown in fig. 8, as an implementation, the interaction module 13 is further connected to a power optimizer collecting module 17, and the power optimizer collecting module 17 is used for collecting power optimizer data in the photovoltaic system. Further, the interaction module 13 is further connected with an external photovoltaic switch device, and when the photovoltaic system is abnormal, the interaction module 13 can cut off the output of the photovoltaic system through the photovoltaic switch device so as to protect a circuit where the photovoltaic system is located. Still further, the interaction module 13 is further connected to an external cloud server, so as to transmit the operation states of all devices in the energy router 100 and the circuit data in the energy router 100 to the cloud server, so that the staff can monitor the devices in the energy router 100.
As an implementation, the control module 14 may control the energy transmission module 11 when the interaction module 13 receives the operation status and control status of all devices in the energy router 100. Specifically, when the MPPT controller 1123 is abnormal, the control module 14 cuts off the protection unit 113 of the branch where the MPPT controller 1123 is located; meanwhile, the control module 14 controls the photovoltaic switching device to be in an off state so as to cut off the output of the photovoltaic system, thereby ensuring the safety of circuit operation. Further, when an abnormality occurs in the external BMS, the control module 14 controls the current converter 1125 to stop operating; meanwhile, the control module 14 cuts off the protection unit 113 between the energy storage system and the dc bus 1121 to ensure the operation safety of the circuit. Further, when the current conversion device 115 is abnormal, the control module 14 cuts off the protection unit 113 of the dc transmission unit 112, and the control module 14 cuts off the protection unit 113 between the dc transmission unit 112 and the ac transmission unit 111 to ensure line safety. Further, when an abnormality occurs in the current transformer 1112, the control module 14 cuts off the protection unit 113 of the branch circuit where the current transformer 1112 is located. Further, when the control module 14 receives the water immersion alarm signal, the smoke alarm signal or the temperature and humidity alarm signal from the interaction module 13, the control module 14 cuts off all the protection units 113 until detecting that all the devices in the energy router 100 are not abnormal. By the above arrangement, the energy router 100 can be operated more safely in a manner that the energy router 100 performs multi-level protection.
As shown in fig. 9, as an implementation manner, to maximize the utilization ratio of the distributed power source, the present application further provides an energy router control method, which includes the steps of:
determining the running state of the mains supply; the running state of the mains supply comprises a first state and a second state, and the mains supply is in the first state when the power is on; when the power is off, the mains supply is in a second state;
determining an operation mode of the energy router 100 according to an operation state of the utility power; specifically, if the utility is in the first state, the energy router 100 executes the first operation mode; if the utility is in the second state, the energy router 100 executes the second operation mode; in the first operation mode, the energy router 100 runs in parallel with the mains supply, and in the second operation mode, the energy router 100 runs off-line;
when the energy router 100 executes the first operation mode, the energy router 100 compares peak regulation benefits and peak valley arbitrage benefits of the power grid, and controls electric energy transmission of the energy router 100 according to a comparison result;
when the energy router 100 performs the second operation mode, the energy router controls the power transmission of the energy router 100 according to the load power and the distributed power supply. The load power is the sum of the power required by the direct-current charging pile, the alternating-current charging pile, the direct-current side load and the alternating-current side load, and the distributed power supply power is the sum of the power provided by the photovoltaic system and the distributed power supply.
As shown in fig. 10, as an implementation manner, when the energy router 100 executes the second operation mode, if the load power in the power grid is greater than or equal to the distributed power source power in the power grid, the energy storage system in the power grid transmits power to the energy router 100, and the output power of the energy storage system satisfies P 1 =P 2 -P 3 . Wherein P is 1 For the output power of the energy storage system, P 2 For load power, P 3 Is distributed power. Further, when the remaining available capacity (energy storage SOC) of the energy storage system is equal to or greater than the first preset capacity, the energy storage system transmits power to the energy router 100; when the energy storage SOC is less than the first preset capacity, the energy storage system stops transmitting power to the energy router 100 to protect the battery of the energy storage system. Further, after the energy storage system stops transmitting power to the energy router 100, part of the direct current side load and/or the alternating current side load stops working until the commercial power resumes transmission and then is started through the energy storage system. It can be appreciated that, according to actual requirements, the value of the first preset capacity may be adjusted, and in this application, the value of the first preset capacity may be set to 10%.
As an implementation manner, when the energy router 100 executes the second operation mode, if the load power in the power grid is less than or equal to the distributed power source power in the power grid, the energy router 100 transmits power to the energy storage system, and the charging power of the energy storage system satisfies P 4 =P 3 -P 2 . Wherein P is 4 And the charging power of the energy storage system. Further, when the energy storage SOC is equal to or less than the second preset capacity, the energy router 100 transmits power to the energy storage system; when the energy storage SOC is greater than the second preset capacity, the energy source pathThe power transmission to the energy storage system is stopped by the router 100, preventing the energy storage system from being damaged by overcharge. Further, when the energy router 100 stops transmitting power to the energy storage system, the control module 14 controls the current converter 1112 so that the distributed power source power is equal to the load power to maintain the input and output balance of the power grid. It can be appreciated that, according to the actual requirement, the value of the second preset capacity can be adjusted, and in this application, the value of the second preset capacity can be set to 90%.
With the above arrangement, the energy router 100 can make full and reasonable use of the electric energy of the distributed power supply.
As shown in fig. 11, as an implementation manner, when the energy router 100 executes the first operation mode and the peak regulation gain of the power grid is greater than or equal to the peak valley of the power grid, if the utility power is in the valley period, the energy router 100 transmits the electric energy input by the utility power to the energy storage system to charge the energy storage system; if the load power of the power grid is higher than the preset power, the energy storage system transmits power to the energy router 100 to fill the power required by the power grid. Further, when the energy storage system is charged, if the energy storage SOC is larger than the second preset capacity, the energy storage system stops charging; when the energy storage system transmits power to the energy router 100, if the energy storage SOC is smaller than the first preset capacity, the energy storage system stops transmitting power to protect the energy storage system. Through the arrangement, when the peak regulation gain of the power grid is Yu Fenggu set of benefits, the energy router 100 can discharge through the energy storage system to regulate the peak of the power grid; in the valley price stage, the energy router 100 may charge the energy storage system through the utility power, thereby achieving the maximization of economic benefit.
As an implementation manner, when the energy router 100 executes the first operation mode and the peak regulation benefit of the power grid is less than or equal to the peak valley set benefit of the power grid, if the electricity price of the utility power in the valley period is greater than or equal to the internet electricity price, the energy router 100 controls the electric energy transmission of the energy router 100 according to the electricity price period of the utility power. Wherein the electricity rate period includes a valley rate period and a peak rate period. More specifically, when the electricity price is in the peak price period, if the load power is smaller than the distributed power supply power, the energy router 100 may sell the surplus electricity online; if the load power is greater than or equal to the distributed power source power, the energy storage system outputs power to the energy router 100 until the energy storage SOC is less than or equal to the first preset capacity. Further, when the electricity price is in the valley price period, if the load power is smaller than the distributed power source power, the energy router 100 transmits power to the energy storage system to charge the energy storage system; if the load power is greater than or equal to the distributed power supply power, the power required by the load is insufficient, and at this time, the utility power is transmitted to the energy router 100 to supplement the insufficient power.
As an implementation manner, when the energy router 100 executes the first operation mode and the peak regulation benefit of the power grid is less than or equal to the peak Gu Taoli benefit, if the electricity price of the utility power in the valley period is less than the internet electricity price, the energy router 100 controls the electric energy transmission of the energy router 100 according to the load power and the distributed power source power. Specifically, when the load power is smaller than or equal to the distributed power supply power, the redundant electric quantity is sold in a network; when the load power is greater than the distributed source power, the energy storage system transmits power to the energy router 100. Further, during the valley period, the energy router 100 may charge the energy storage system through the mains supply until the energy storage SOC is greater than or equal to the second preset capacity; when in peak electricity periods, the energy storage system may transmit power to energy router 100 to achieve peak valley arbitrage of the power grid.
Through the above arrangement, the energy router 100 can select a control mode to control the electric energy transmission of the energy router 100 according to the peak regulation benefit and the peak valley regulation benefit, and process the surplus electric quantity or the insufficient electric quantity of the power grid according to the electricity price period, so as to realize the maximization of economic benefit.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (8)
1. The energy router control method is characterized by comprising the following steps:
determining the running state of the mains supply; the running state of the mains supply comprises a first state and a second state, and the mains supply is in the first state when the power is electrified; when the power is off, the commercial power is in the second state;
determining an operation mode of the energy router according to the operation state of the mains supply; if the commercial power is in the first state, the energy router executes a first operation mode; if the commercial power is in the second state, the energy router executes a second operation mode;
when the energy router executes the first operation mode, the energy router compares peak regulation benefits and peak valley arbitrage benefits of a power grid, and controls electric energy transmission of the energy router according to a comparison result;
when the energy router executes the second operation mode, the energy router controls electric energy transmission of the energy router according to load power and distributed power supply power of a power grid;
when the energy router executes the first operation mode and the peak regulation gain of the power grid is greater than or equal to the peak valley arbitrage gain of the power grid, if the commercial power is in a valley period, the energy router transmits the electric energy input by the commercial power to an energy storage system so as to charge the energy storage system; if the load power of the power grid is higher than the preset power, the energy storage system transmits power to the energy router so as to fill the power required by the power grid;
when the energy router executes a first operation mode and the peak regulation gain of the power grid is smaller than or equal to the peak valley arbitrage gain of the power grid, if the electricity price of the commercial power in a valley price period is larger than or equal to the internet surfing electricity price, the energy router controls the electric energy transmission of the energy router according to the electricity price period of the commercial power; wherein the electricity price period of the commercial power comprises a valley price period and a peak price period.
2. The energy router control method of claim 1, wherein when said energy router performs said second operationIn the line mode, if the load power in the power grid is greater than or equal to the distributed power supply power of the power grid, the energy storage system in the power grid transmits power to the energy router, and the output power of the energy storage system meets the requirement P 1 =P 2 -P 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein P is 1 For the output power of the energy storage system, P 2 For load power, P 3 Is distributed power.
3. The energy router control method of claim 2, wherein the energy storage system stops transmitting power to the energy router when a remaining available capacity of the energy storage system is less than or equal to a first preset capacity.
4. The energy router control method of claim 2, wherein when the energy router performs the second mode of operation, if the load power in the grid is less than or equal to the distributed power source power of the grid, the energy router transmits power to the energy storage system, and the charging power of the energy storage system satisfies P 4 =P 3 -P 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein P is 4 And charging power for the energy storage system.
5. The energy router control method of claim 4, wherein the energy router stops transmitting power to the energy storage system when a remaining available capacity of the energy storage system is greater than or equal to a second preset capacity.
6. An energy router adapted to the energy router control method according to any one of claims 1 to 5, characterized in that the energy router comprises:
the energy transmission module is connected with an external power grid, a distributed power supply and a load, and can schedule the distributed power supply so as to maximize the utilization rate and economic benefit of the distributed power supply;
the interaction module is used for carrying out data transmission in the energy router;
the data transmission module is used for transmitting the circuit data in the energy transmission module and the running state in the energy transmission module to the interaction module;
the control module is used for controlling all devices in the energy router and controlling the dispatching of the distributed power supply;
and the display module displays the running conditions, the control conditions and the circuit data of all the devices in the energy router in a control interface.
7. The energy router of claim 6, wherein the energy transmission module comprises a dc transmission unit and an ac transmission unit, the dc transmission unit and the ac transmission unit are connected, and a current conversion device for ac-dc conversion is disposed between the dc transmission unit and the ac transmission unit.
8. The energy router of claim 7, wherein the dc transmission unit is connected to an external photovoltaic system, an energy storage system, a dc power transmission device, and a dc side load; the alternating current transmission unit is connected with an external distributed power supply, an alternating current transmission device, an alternating current side load and a commercial power.
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| JPWO2014115569A1 (en) * | 2013-01-28 | 2017-01-26 | 阿部 力也 | Power router and its operation control method and program, power network system, management device control program |
| CN103236718B (en) * | 2013-03-26 | 2014-12-31 | 东北大学 | Source-network-load automatic control system and method for intelligent microgrid |
| CN108923449A (en) * | 2018-06-28 | 2018-11-30 | 国网上海市电力公司 | A kind of household energy management system and method |
| CN109888774A (en) * | 2019-03-04 | 2019-06-14 | 武汉大学 | A kind of Optimal Scheduling and method of Internet of Things energy router |
| CN110138008A (en) * | 2019-05-29 | 2019-08-16 | 哈尔滨工业大学 | Using the electric power energy router of power line carrier communication |
| CN110289621A (en) * | 2019-07-18 | 2019-09-27 | 华北电力大学 | A kind of alternating current-direct current electric energy router of the access containing distributed generation resource |
| CN110649621A (en) * | 2019-09-10 | 2020-01-03 | 安徽南瑞继远电网技术有限公司 | Low-voltage energy router with load priority control function and control method thereof |
| CN111952996B (en) * | 2020-07-16 | 2022-05-06 | 国网江西省电力有限公司南昌供电分公司 | Energy-storage-containing distributed photovoltaic peak regulation control method based on economic benefit evaluation |
| CN112865146A (en) * | 2021-02-01 | 2021-05-28 | 华北电力大学 | Method for generating coordinated operation strategy of user-side energy storage system |
| CN114186722A (en) * | 2021-11-25 | 2022-03-15 | 国网北京市电力公司 | Method and device for determining income of generator set, storage medium and electronic device |
| CN114597901A (en) * | 2022-03-28 | 2022-06-07 | 东北大学 | Energy router based on multi-mode hierarchical management strategy and control method |
| CN114819373A (en) * | 2022-05-09 | 2022-07-29 | 华北电力大学（保定） | Energy storage planning method for sharing hybrid energy storage power station based on cooperative game |
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