EP3895273A1 - Energiequelle für ein gleichspannungsnetz, verfahren zum betrieb einer solchen energiequelle, gleichspannungsnetz mit einer mehrzahl solcher energiequellen und verfahren zum betrieb eines solchen gleichspannungsnetzes - Google Patents
Energiequelle für ein gleichspannungsnetz, verfahren zum betrieb einer solchen energiequelle, gleichspannungsnetz mit einer mehrzahl solcher energiequellen und verfahren zum betrieb eines solchen gleichspannungsnetzesInfo
- Publication number
- EP3895273A1 EP3895273A1 EP20706964.2A EP20706964A EP3895273A1 EP 3895273 A1 EP3895273 A1 EP 3895273A1 EP 20706964 A EP20706964 A EP 20706964A EP 3895273 A1 EP3895273 A1 EP 3895273A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- energy source
- connection point
- energy
- control
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/10—Parallel operation of DC sources
- H02J1/102—Parallel operation of DC sources being switching converters
Definitions
- Energy source for a direct voltage network method for operating such an energy source, direct voltage network with a plurality of such energy sources and method for operating such a direct voltage network
- the invention relates to an energy source device, referred to below as an energy source, for a DC voltage network.
- the energy source device comprises on the one hand the actual energy source, in the case of an energy source device for a direct voltage network, that is to say a direct current or direct voltage source.
- the energy source device comprises at least electrical or electronic functional units for what is known as primary control, a sensor system for detecting at least one electrical variable in the DC voltage network and / or electrical or electronic functional units for exchanging data with other energy source devices and / or a higher-level unit.
- energy source instead of “energy source device”. Whenever the term “energy source” is used, the term “energy source device” must always be read along with it.
- the invention further relates to a method for operating an energy source of the aforementioned type, a DC voltage network with a plurality of such energy sources and finally a method for operating such a DC voltage network.
- a primary control enables the parallel operation of several energy sources and determines directly or indirectly the respective energy sources. given electrical power.
- the primary control On the basis of the primary control, the total electrical energy available in the electrical network and / or the power can be commutated from at least one energy source to at least one other energy source.
- the secondary regulation aims at avoiding or at least reducing load-dependent fluctuations in the electrical network.
- the tertiary control causes individual energy sources to be switched on or off depending on a power requirement in the electrical network.
- the secondary control and the tertiary control are implemented in a higher-level unit, referred to below as the control station - the control station is hierarchically superordinate to the energy sources. Due to the secondary or tertiary regulation resulting control signals for the energy sources feeding the electrical network are transmitted from the control station to the respective energy source or the respective energy sources.
- a bus system for example, can be used for such a transmission.
- control system fails and / or the communicative connection between the control system and the energy sources fails, the central secondary control and the central tertiary control brought about by the control system are no longer available. This can lead to an overload situation and ultimately to a failure of the electrical network.
- An object of the invention is based on this, ei ne electrical energy source, in particular an energy source in the form of a direct current or direct voltage source, a method for operating such an energy source, an electrical network with a plurality of such energy sources and a method for operating such a network specify that avoids the risk of a power failure due to a failure of a control system or a failure of a communicative connection to the control system.
- this task is according to the invention by means of an energy source (energy source device) in the form of a direct current or direct voltage source for a direct voltage network, whereby electrical energy can be fed to a junction point of the direct voltage network by means of the energy source and electrical energy can be fed in during operation by the energy source the connection point is fed in, achieved in that the energy source has a functional unit functioning as a control unit for automatic switching on or off of the energy source, the control unit being determined and set up in such a way that it ensures that it is not the last one remaining before it is switched off Energy source is at the point of connection.
- this object is achieved according to the invention by the features of the parallel method claim. It is then provided that in a method for operating an energy source (energy source device) in the form of a direct current or direct voltage source and in a direct voltage network by means of the energy source, electrical energy is fed to a junction point of the direct voltage network, so that the energy source has a functional unit that functions as a control unit which generates a switch-on or switch-off signal for the automatic switch-on or switch-off of the energy source, the energy source ensuring that it is not the last remaining energy source at the point of connection before it is switched off.
- energy source energy source device
- the invention is also a DC voltage network with, on the one hand, a plurality of energy sources of the type described here and below, connected to a common connection point, and, on the other hand, at least one consumer connected to the connection point.
- the invention is also a method for loading such a DC voltage network.
- the invention is in addition, a method for operating a DC voltage network with a plurality of energy sources of the type described here and below connected to a common junction point and at least one consumer connected to the junction point, with different delay times of the control units of all energy sources.
- the advantage of the solution proposed here is that the tertiary control previously assigned to the control system is now implemented in a decentralized manner, specifically in each energy source by means of a respective control unit. If the control system fails, the central tertiary control previously carried out by a central control station is now still available in the form of a decentralized tertiary control carried out by the respective control units of the energy sources. A central control station is no longer necessary. Because the control system and / or the communication with the control system are often redundant because of the failure of the control system or the communication with the control system, the present invention eliminates the need for such a redundant design.
- the tertiary control can be implemented as central tertiary control - in the control station - and as decentralized tertiary control - in the energy sources, with the decentralized tertiary control being activated when the control station or the communicative connection to the Control station fails.
- the control unit assigned to an energy source according to the invention for automatically connecting or disconnecting the energy sources of the DC voltage network is also referred to below as “decentralized tertiary control” or the control unit itself as “decentralized tertiary control unit” because the respective Control units provided control of the supply and Switching off the energy sources of the DC voltage network is similar to a central control system or a control station he brought tertiary control, hereinafter referred to as "central tertiary control" for differentiation, only with the difference that the control proposed here is organized decentrally.
- the procedure has different aspects in connection with the approach proposed here.
- an automatic connection or disconnection of an energy source is provided within the scope of the proposed decentralized tertiary control
- simultaneous connection or disconnection of several energy sources is prevented by various delay times of the decentralized tertiary control units.
- the decentralized tertiary control units monitor communication with the control station.
- the decentralized tertiary control is automatically activated by the decentralized tertiary control units of the energy sources. These then take over the tertiary control instead of the control station.
- the energy source comprises a control unit which is intended and set up to generate a connection signal, the connection signal being generated when the energy source is switched off and a DC voltage amplitude at the node drops below a first comparison value.
- the control unit If the conditions covered by the connection rule are met, the energy source is automatically switched on or the energy source is automatically switched on at least.
- the control unit In a corresponding method for operating the energy source, the control unit generates a connection signal for automatic connection of the Energyquel le when the energy source is switched off and a DC voltage amplitude at the node drops below the first comparison value.
- the energy source comprises a control unit which is intended and set up to generate a switch-off signal, the switch-off signal being generated when the energy source is switched on and either one or the DC voltage amplitude at the node exceeds a second comparison value or an active power output by the energy source falls below a third comparison value.
- a control unit which is intended and set up to generate a switch-off signal, the switch-off signal being generated when the energy source is switched on and either one or the DC voltage amplitude at the node exceeds a second comparison value or an active power output by the energy source falls below a third comparison value.
- the control unit With a corresponding Method for operating the energy source, the control unit generates a switch-off signal for automatically switching off the energy source when the energy source is switched on and either the DC voltage amplitude at the point of connection exceeds the second comparison value or the active power output by the energy source falls below the third comparison value.
- an energy source with such an implementation of a switch-on rule also includes such an implementation of a switch-off rule and vice versa.
- the switch-on signal and / or the switch-off signal can be output with a time delay by the control unit by a predetermined or predeterminable delay time and is output with a time delay during operation by the delay time. With different delay times, this avoids unintentional simultaneous connection or disconnection of several energy sources.
- different delay times are guaranteed by the fact that the energy sources included in a DC voltage network are each given different delay times, for example by stamping or loading time values into memory areas provided for this purpose encode the respective delay time, and these time values are each different.
- the last remaining energy source is prevented from also switching off and the voltage supply thus failing.
- Each energy source therefore monitors at least in connection with a planned automatic shutdown process to determine whether it is the last remaining energy source at the connection point.
- an energy source for which an automatic shutdown process is imminent is briefly referred to below as an outgoing energy source.
- an outgoing energy source no longer takes part in the energy supply at the connection point.
- An outgoing energy source lowers its power point before it is actually switched off, i.e. H. the power consumption point of a droop function serving the primary control of the energy source, for example via a temporal ramp function.
- the outgoing energy source activates an automatically activatable and automatically deactivatable shutdown process. This is implemented, for example, as a partial functionality of a standby state, which is activated when the energy source is automatically switched off on the basis of a switch-off signal or a corresponding status of an output signal from the control unit.
- the power point Due to the activated shutdown process and during the shutdown process, the power point is reduced. If, in addition to the outgoing energy source, at least one other energy source is actively involved in supplying the DC voltage network with electrical energy, the power of the outgoing energy source is automatically commutated to the or every other energy source due to the primary control. This at least one further energy source thus gradually takes over the feeding of the electrical power that is no longer fed in from the outgoing energy source in the course of the decrease in the power consumption point. The outgoing energy source automatically monitors the DC voltage amplitude at its connection point during the shutdown process.
- the lowering of the Performance point stopped.
- the process of switching off the energy source recognizes that the energy source is the last remaining energy source at the connection point, and the energy source does not switch off; the shutdown process is ended.
- the shutdown process is continued and the power fed in by the outgoing energy source drops in the course of the shutdown process, for example to zero.
- the outgoing energy source can be switched off, which corresponds to an activation of the standby state.
- an outgoing energy source can also be switched off automatically as part of the shutdown process if commutation to at least one other energy source is detected during the shutdown process when the power consumption point is lowered and the power consumption point falls below a threshold value.
- the outgoing energy source lowers its power on point as part of the shutdown process. This reduces the voltage amplitude, but not the power of the energy source currently provided at the connection point.
- the reduction in voltage is limited by a fourth comparison value. When the voltage amplitude of the energy source reaches this fourth comparison value and the power is greater than zero, the energy source is the last remaining source and does not switch off.
- the shutdown process is exited as follows: The power of the consumers and the power of the energy source currently available at the connection point increase because consumers connected to the connection point increase their output or new consumers are switched on. If the voltage at the connection point falls below the fourth comparison value, the energy source increases its power consumption point, since the voltage is not below the fourth comparison value remains. As a result, the power consumption point increases. Falling below the fourth comparison value or increasing the power consumption point after falling below the fourth comparison value terminates the shutdown process and leads to the standby state being exited. After leaving the standby mode, the energy source is again in the operating mode.
- the active power at the node i. H. the power of the energy source currently provided at the connection point and / or the power consumption point of the droop function of the outgoing energy source can be compared with further fifth and sixth comparison values, for example also stored in the memory as limit values, and if these comparison values are exceeded, the Shutdown process and leaving the standby mode.
- the fifth and sixth comparison values must have a reasonable distance from the second and third comparison values so that the energy source does not toggle. After leaving the standby mode, the energy source is again in the operating state.
- control units listen to every communication with a higher-level control system and activate the decentralized tertiary control by the respective control unit if communication with the control system fails.
- the decentralized tertiary control is permanently activated in the energy sources.
- the decentralized tertiary control in the energy sources is preferably activated automatically, through automatic activation of the decentralized tertiary Control function of the control unit if the control system or communication with the control system fails.
- the criterion for this is, for example, an automatic monitoring of communication with the control system implemented in each energy source, in particular the control unit there.
- the automatic monitoring of communication with the control system is implemented, for example, in the form of a basically known watchdog function. To do this, the watchdog function listens to the communication between the energy source and the control system. Every communication from the control system and incoming to an energy source, for example a telegram sent by the control system and received by an energy source, is evaluated as a sign of life from the control system, which resets the watchdog of the energy source.
- the counter on which the watchdog is based ultimately runs down, and a lack of sign of life from the control system and, as a result, a failure of the control system or a failure of communication with the control system are automatically detected.
- the watchdog expires, the decentralized tertiary control is automatically activated in the energy sources, i.e. the control unit is automatically activated.
- the control system which also detects a failure of communication to an energy source, activates the decentralized tertiary control in all communicatively still accessible energy sources and thus its own central secondary control and central control Tertiary control deactivated. Then there is no mixed operation between the still accessible and the no longer accessible energy sources.
- the monitoring of communication with the control system can also be secured by adding a characteristic identifier to each telegram from the control system. holds, for example, the value of a counter that is incremented with each telegram. Then the watchdog of an energy source is only reset on the basis of an incoming telegram, which is automatically recognizable as a follow-up telegram of a previously received telegram based on the characteristic identifier.
- the control unit of an energy source is preferably implemented in the form of a microcontroller, in the form of a microprocessor together with a memory, in the form of an ASIC, FPGA or the like.
- the activation or deactivation of the control unit can be implemented, for example, in that the output signals of a deactivated control unit are ineffective, for example due to a corresponding masking.
- the internal functionality of the control unit is then active regardless of the activation status.
- the activation state only influences the output of the output signals or the effectiveness of the output signals.
- control unit which can be integrated, for example, by retrofitting in an energy source that is already in operation, which works according to the method as described here and below, and means for implementing the method includes.
- the method is preferably implemented in the form of a computer program.
- the invention is thus on the one hand a Com puterprogram with program code instructions that can be executed by a computer and on the other hand a storage medium with such a computer program, so a computer program product with program code means, and finally also an energy source or a control unit, in the memory as a means to carry out the Method and its Ausgestaltun conditions such a computer program is loaded or loadable.
- FIG. 1 shows an energy generation system with energy sources
- FIG 3 droop functions for primary control of an energy source
- FIG. 4 shows a power generation system as in FIG. 1 with an optional or only temporarily available control station
- FIG. 5 shows an energy source of an energy generation system as in FIG. 4 with a functional unit functioning as a control unit
- FIG. 6 shows a logic diagram as an example of a possible implementation of a decentralized tertiary control
- FIG. 7 shows resulting states of an energy source as part of the decentralized tertiary control as in FIG. 5.
- the energy generation system 10 comprises a plurality of energy sources 14 connected together at a connection point 12 (symbolically denoted by EQ1, EQ2... EQn).
- energy consumers 16 (symbolically denoted VI, V2... Vn) connected to the connection point 12 and sometimes briefly referred to below as consumers 16 are supplied with electrical energy.
- the energy sources 14 jointly ensure the supply of the consumers 16. However, this does not preclude an individual energy source 14 or individual energy sources 14 from being switched on or off as required.
- a common supply of the loads 16 by means of the energy sources 14 does not mean that all the energy sources 14 connected to the node 12 are permanently active.
- the energy supply can also be carried out on the basis of DC voltage.
- the energy sources 14 then provide a DC voltage with a defined amplitude (DC voltage amplitude Eh st ) for the energy consumer 16 at the node 12.
- the power sources 14 operate either as DC voltage sources or DC current sources.
- each energy source 14 so as part of the functionality of each energy source 14, the so-called (known per se) primary control is implemented.
- the primary control made light the parallel operation of several energy sources 14.
- the primary control is implemented on the basis of so-called (known per se) droop functions 20, 22 (FIG. 2, FIG. 3). These differ depending on the mode of operation of the respective energy source 14.
- the droop function 20 causes, depending on an active power Pi st , which the energy source 14 provides at its output and thus at the node 12, a reduction in a DC voltage amplitude Usoll output by the energy source 14
- the droop function 22 causes, depending on a direct voltage amplitude U lst output by the energy source 14, a lowering of the power P soii output by the energy source 14 and thus fed into the node 12 .
- the representations in FIG. 2 and FIG. 3 each show an example of a droop function 20, 22 for operating an energy source 14 operating as a voltage source (FIG. 2) or for operating an energy source 14 operating as a current source (FIG. 3).
- Usoll-ku (P 0 - Pist) + Uo are the setpoint amplitude U soii of the direct voltage which is provided by the voltage regulator of the energy source 14, the gradient k u of the droop function 20, the power point Po of the droop function 20, the voltage point Uo of the droop function 20 and the power Pi st currently made available at the node 12 of the energy source 14 (power supplied is positive).
- P -l / ku (Uo _ U t) + Po are the setpoint P soii of the power which is provided by the power regulator or current regulator of the energy source 14 (delivered power is positive), the gradient 1 / ku of the droop function 22, the Power point Po of the droop function 22, the voltage point Uo of the droop function 22 and the current amplitude of the direct voltage Ui st at the node 12 (power supplied is positive).
- the control system 24 is a hierarchically superordinate unit to the energy sources 14 connected at a common connection point 12. Depending on a power requirement of the connected consumers 16, energy sources 14 must be switched on and off. This task is taken over by the tertiary regulation.
- the secondary control which is subordinate to the tertiary control, ensures that the amplitude of the direct voltage provided at the node 12 is constant or at least essentially constant and does not fluctuate as a function of the load. For this purpose, the secondary control varies the parameters of the subordinate primary controls, i.e. the parameters of the respective droop function 20, 22.
- the secondary control thus shifts the straight line of the respective droop function 20, 22 to the right or left or up or down.
- the control system 24 is communicatively connected to each energy source 14 in a manner known per se, for example via a field bus.
- This communicative connection is shown in the presen- tation in FIG. 1 in the form of double arrows between the energy sources 14 and the control system 24.
- the double arrows illustrate, on the one hand, a communication infrastructure, for example a fieldbus, and, on the other hand, data transmitted in the context of communication, for example telegrams transmitted according to a bus protocol.
- the functions of the tertiary and secondary control are no longer given or at least no longer fully given.
- the then missing central tertiary control can lead to an overload of the active energy sources 14 when the load changes and as a result to a protective shutdown of the or each overloaded energy source 14 and thus ultimately lead to a failure of the energy supply as a whole.
- the approach proposed here relates to an operation of a DC voltage network 30 shown in FIG. 4 on the basis of the illustration in FIG. 1. Specifically, the approach proposed here relates to the operation of a DC voltage network 30 without a superimposed control system 24 or an operation of a DC voltage network 30 in which a superimposed control system 24 is at least temporarily unavailable.
- the DC voltage network 30 is an energy generation system 10 with a plurality of energy sources 14 connected to a common node 12 in the form of DC voltage or DC current sources.
- a decentralized tertiary control in all energy sources 14 instead of a central tertiary control of a control system 24 or in addition to a central tertiary control of a control system 24 is provided for operating a DC voltage network 30.
- the primary control remains as before and takes place, for example, on the basis of droop functions 20, 22 (FIG. 2, FIG. 3).
- each energy source 14 can, as it were, decide independently when it switches on within the DC voltage network 30 and provides electrical power at the common node 12 of the DC voltage network 30 and when it switches off again.
- the criteria for the automatic connection or disconnection are based on network variables that all energy sources 14 at their connection point (electrically equivalent to the common Connection point 12) are accessible, derived. This makes use of the fact that the DC voltage amplitude Ui St at node 12 changes due to the primary control in the energy sources 14 depending on the load state at node 12. Previously (in a system with control system 24 and central tertiary and secondary control) the secondary control had a constant DC voltage amplitude Ui St as its goal.
- the following variables serve an energy source 14 as a decision criterion for automatic switching on or off:
- control unit 32 is shown schematically simplified as part of an individual energy source 14.
- the energy source 14 direct current or
- Each energy source 14 comprises a sensor system that is basically known per se, for example DC voltage sensors for detecting the DC voltage amplitude Ui St at the connection point 12, and DC sensors for detecting the from the direct current Ii St supplied to the energy source 14 and power meters for detecting the active power Pi St supplied by the energy source 14.
- the active power Pi St can alternatively be derived from the measured
- the DC voltage Ui st and the measured direct current Ii st are calculated.
- the recorded values are processed by the control unit 32.
- the above-mentioned comparison values (first, second, third comparison value) are, for example, impressed into the memory 34 as limit values 36 or loaded into the memory 34 as variable limit values 36.
- the control unit 32 comprises, in a manner known per se, a comparator 38 or a software or firmware implementation of a comparator. On the basis of an output signal from the comparator 38, at least one output signal from the control unit 32 results.
- the output signal from the control unit 32 or an output signal from the control unit 32 acts as a switch-on or switch-off signal 40, 42 for the respective energy source 14 and causes an automatic connection or switching off the energy source 14.
- FIG. 6 shows a schematically simplified logic diagram as an example of a possibility of implementing the automatic generation of a switch-on and switch-off signal 40, 42 on the basis of the variables monitored by the control unit 32 as a decision criterion for the automatic switch-on or switch-off.
- the representation of the comparator 38 in FIG. 5 can also be understood as a representation of an implementation of the logic diagram shown in FIG. 6 comprising at least one comparator 38.
- FIG. 7 different operating states 50, 52 of an energy source 14 according to FIG. 5 are shown in a schematically simplified manner.
- an operating state 50 is activated on the basis of a switch-on signal 40 or a corresponding status of an output signal of the control unit 32.
- a standby state 52 is activated on the basis of a switch-off signal 42 or a corresponding status of an output signal of the control unit 32.
- the switch-on or switch-off signals 40, 42 are preferably converted - or generally the or each output signal of the control unit is converted 32 - in the individual energy sources 14 according to a predetermined or predeterminable time delay, the concrete delay times in all energy sources 14 are set differently and have a sufficiently large distance from several seconds to minutes. The order in which the energy sources 14 are switched on and off is determined by the selection of the delay times.
- This determination of the sequence when switching on and off and the consideration of the established sequence is preferably also done by means of the control unit 32.
- the memory 34 of each control unit 32 is stamped with a unique time value 54 (FIG. 5) or such a unique time value 54 is loaded into memory 34 as a variable time value 54. If delay times are taken into account in this way, the or each output signal of the control unit 32 is only output after the respective time value 54 has expired.
- each energy source 14 monitors at least in connection with a planned automatic shutdown process whether it is the last remaining energy source 14 at the connection point 12.
- An energy source for which an automatic shutdown process is imminent is briefly referred to below as an outgoing energy source 14.
- An outgoing energy source 14 no longer takes part in the energy input at the node 12 after the shutdown process has been completed.
- An outgoing energy source 14 lowers its power consumption point Po before the actual shutdown, for example via a temporal ramp function.
- the outgoing energy source 14 activates an automatically activated and automatically deactivated shutdown process 56. This is implemented, for example, as a partial functionality of the ready state 52.
- the outgoing energy source 14 automatically monitors the DC voltage amplitude U ist at its connection point 12 during the shutdown process 56.
- the shutdown process 56 of the energy source 14 recognizes that the energy source 14 is the last remaining energy source 14 at the node 12 and the energy source 14 does not shut down (the shutdown process 56 is ended).
- the shutdown process 56 is continued, and the power Pi st fed in from the outgoing energy source 14 drops in the course of the shutdown process 56, for example to zero.
- the outgoing energy source 14 can be switched off (activation of the standby state 52).
- an outgoing energy source 14 can also be switched off automatically as part of the shutdown process 56 if commutation to at least one further energy source 14 is detected during the shutdown process 56 when the power point Po is lowered and the power point Po falls below a threshold value. In other words, the outgoing energy source 14 lowers its power point Po as part of the shutdown process 56.
- the shutdown process 56 is exited as follows: The power of consumers 16 and Pi St increase because consumers 18 connected to node 12 increase their output or new consumers 18 are switched on. If the voltage at the connection point falls below the fourth comparison value VG4, the energy source 14 raises its power consumption point Po, since the voltage does not remain below the fourth comparison value VG4. As a result, Po increases. Falling below the fourth comparison value VG4 or increasing the power consumption point Po after falling below the fourth comparison value VG4 terminate the shutdown process 56 and result in the standby state 52 being exited. After leaving the standby state 52, the energy source 14 is again in the operating state 50.
- the active power Pi st at the connection point and / or the power consumption point Po of the outgoing energy source are compared with further fifth and sixth comparison values VG5 or VG6 (for example also stored in the memory 34 as limit values 36), and one Exceeding these comparison values causes the shutdown process 56 to end and the state of readiness 52 to be exited.
- the fifth and sixth comparison values VG5 and VG6 must be a reasonable distance from the second and third comparison values VG2 and VG3 so that the energy source 14 does not toggle. After leaving In the standby state 52, the energy source 14 is again in the operating state 50.
- the decentralized tertiary control in the energy sources 14 is permanently activated.
- the decentralized tertiary control in the energy sources 14 is preferably automatically activated (by automatic activation of the decentralized tertiary control function of the control unit 32) when the control system 24 or the communication to the Control system 24 fail.
- the criterion for this is, for example, an automatic monitoring of the communication with the control system 24 implemented in each energy source 14, in particular the control unit 32 there.
- the automatic monitoring of the communication with the control system 24 is, for example, in the form of a basically known watchdog Function 58 implemented.
- Each communication from the control system 24 and incoming to an energy source 14, for example a telegram sent by the control system 24 and received by an energy source 14, is evaluated as a sign of life of the control system 24 and resets the watchdog of the energy source 14.
- the watchdog function 58 listens to the communication with the control system 24, as shown in the illustration in FIG. 4 schematically simplified by an arrow starting from the double arrow and pointing to the watchdog function 58, the double arrow (such as in FIG 1) the communication between the energy source 14 and the control system 24 represents.
- the counter on which the watchdog is based finally runs down and a lack of sign of life from the control system 24 and, as a result, a failure of the control system 24 or a failure of communication with the control system 24 are automatically detected.
- the decentralized tertiary control is then automatically activated in the energy sources 14, that is to say the decentralized tertiary control unit 32 is automatically activated.
- control system 24 which itself recognizes a failure of communication to an energy source 14, activates the decentralized tertiary control in all communicatively still accessible energy sources 14 and thus deactivates its own central secondary control and its own central tertiary control. Then there is no mixed operation between the still accessible and the no longer accessible energy sources.
- each telegram originating from the control system 24 includes a characteristic identifier, for example the value of a counter incremented with each telegram. Then the watchdog of an energy source 14 is reset only on the basis of an incoming telegram, which is automatically recognizable as a follow-up telegram of a previously received telegram based on the characteristic identifier.
- control unit 32 of an energy source 14 (control unit 32 of an energy source device 14) is preferably implemented in the form of a microcontroller, in the form of a microprocessor together with a memory 34, in the form of an ASIC, FPGA or the like.
- the activation or deactivation of the control unit 32 can be implemented, for example, in that in the case of a deactivated control unit 32, the output signals 40, 42 thereof are inoperative (for example due to a corresponding masking).
- the internal functionality of the control unit 32 is then active regardless of the activation state.
- the activation status only affects the output of the output Signals 40, 42 or the effectiveness of the output signals 40,
- An energy source (energy source device) 14 in the form of a direct current or direct voltage source for a direct voltage network 30 and a method for operating it are specified the energy source 14 electrical see energy can be fed to a node 12 of the DC voltage network 30 and is fed in during operation, and the energy source 14 has a control unit 32 for decentralized tertiary control, ie for automatically switching on or off the energy source 14.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Control Of Voltage And Current In General (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19157434.2A EP3696935A1 (de) | 2019-02-15 | 2019-02-15 | Energiequelle in einem gleichspannungsnetz, verfahren zum betrieb einer solchen energiequelle, gleichspannungsnetz mit einer mehrzahl solcher energiequellen und verfahren zum betrieb eines solchen gleichspannungsnetzes |
| PCT/EP2020/053534 WO2020165207A1 (de) | 2019-02-15 | 2020-02-12 | Energiequelle für ein gleichspannungsnetz, verfahren zum betrieb einer solchen energiequelle, gleichspannungsnetz mit einer mehrzahl solcher energiequellen und verfahren zum betrieb eines solchen gleichspannungsnetzes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3895273A1 true EP3895273A1 (de) | 2021-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19157434.2A Withdrawn EP3696935A1 (de) | 2019-02-15 | 2019-02-15 | Energiequelle in einem gleichspannungsnetz, verfahren zum betrieb einer solchen energiequelle, gleichspannungsnetz mit einer mehrzahl solcher energiequellen und verfahren zum betrieb eines solchen gleichspannungsnetzes |
| EP20706964.2A Withdrawn EP3895273A1 (de) | 2019-02-15 | 2020-02-12 | Energiequelle für ein gleichspannungsnetz, verfahren zum betrieb einer solchen energiequelle, gleichspannungsnetz mit einer mehrzahl solcher energiequellen und verfahren zum betrieb eines solchen gleichspannungsnetzes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19157434.2A Withdrawn EP3696935A1 (de) | 2019-02-15 | 2019-02-15 | Energiequelle in einem gleichspannungsnetz, verfahren zum betrieb einer solchen energiequelle, gleichspannungsnetz mit einer mehrzahl solcher energiequellen und verfahren zum betrieb eines solchen gleichspannungsnetzes |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP3696935A1 (de) |
| CN (1) | CN113439374B (de) |
| WO (1) | WO2020165207A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009149518A1 (en) * | 2008-06-13 | 2009-12-17 | Ceramic Fuel Cells Limited | Fuel cell stabilisation system and method |
| US8008808B2 (en) * | 2009-01-16 | 2011-08-30 | Zbb Energy Corporation | Method and apparatus for controlling a hybrid power system |
| US9093862B2 (en) * | 2009-01-16 | 2015-07-28 | Zbb Energy Corporation | Method and apparatus for controlling a hybrid power system |
| DE102009000323A1 (de) * | 2009-01-20 | 2010-07-22 | Robert Bosch Gmbh | Serienschaltung von Schaltreglern zur Energieübertragung in Batteriesystemen |
| DE102010005656A1 (de) * | 2010-01-19 | 2011-07-21 | Converteam GmbH, 12277 | Verfahren und Vorrichtung zum Betreiben eines Umrichterwerks eines elektrischen Bahn-Netzes |
| US9898018B2 (en) * | 2013-03-14 | 2018-02-20 | Arda Power Inc. | Power clipping method and system |
| US10666047B2 (en) * | 2013-03-14 | 2020-05-26 | Arda Power Inc. | Power management concept in DC distributed systems |
| DE102014108395B4 (de) * | 2014-06-13 | 2019-09-05 | Sma Solar Technology Ag | Energieerzeugungsanlage und Verfahren zum Betrieb einer Energieerzeugungsanlage |
| US9744925B2 (en) * | 2014-07-31 | 2017-08-29 | General Electric Company | DC power system for marine applications |
| CN105262135A (zh) * | 2015-11-11 | 2016-01-20 | 广东电网有限责任公司电力科学研究院 | 含复合储能的风光柴储微电网系统及并网时协调控制方法 |
| CA3062352A1 (en) * | 2017-05-04 | 2018-11-08 | Luis Zubieta | Dc voltage regulation by independent power converters |
| CN109149777B (zh) * | 2018-09-28 | 2020-07-07 | 阳光电源股份有限公司 | 一种关断控制系统和方法 |
-
2019
- 2019-02-15 EP EP19157434.2A patent/EP3696935A1/de not_active Withdrawn
-
2020
- 2020-02-12 WO PCT/EP2020/053534 patent/WO2020165207A1/de not_active Ceased
- 2020-02-12 CN CN202080014742.3A patent/CN113439374B/zh not_active Expired - Fee Related
- 2020-02-12 EP EP20706964.2A patent/EP3895273A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN113439374B (zh) | 2023-11-07 |
| EP3696935A1 (de) | 2020-08-19 |
| CN113439374A (zh) | 2021-09-24 |
| WO2020165207A1 (de) | 2020-08-20 |
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