Stationary auxiliary power supply device and power supply system

Abstract

An auxiliary power supply device (1) for station buildings comprises a power converter (11) and a power converter controller (12). The power converter (11) converts recovered electrical energy supplied by an electric rail vehicle (93) into electrical energy supplied to station building equipment (96) and surrounding equipment (97), and outputs the converted electrical energy. The power converter controller (12) monitors the voltage of a railway power supply line (92) and controls the power converter (11) according to the voltage of the railway power supply line (92). If the output power of the power converter (11) is greater than the power consumption of the station building equipment (96), the output power of the power converter (11) is supplied to the station building equipment (96) and the surrounding equipment (97) via an equipment power supply line (95).If the output power of the power converter (11) is equal to or less than the power consumption of the station building equipment (96), the output power of the power converter (11) is supplied to the station building equipment via the plant power supply line (95).

Description

Technical field

[0001] The present disclosure relates to an auxiliary power supply device for station buildings and a power supply system. State of the art

[0002] The recovered electrical energy (or recovered electrical current) generated during the braking of an electric rail vehicle is supplied to station building equipment located in a (railway) station building, such as air conditioning systems, lighting devices, and elevators, as well as to a device in this electric rail vehicle, other nearby electric rail vehicles, and the like. An example of a power supply system that provides electricity to station building equipment is disclosed in patent literature 1. The system for adjusting the power supply disclosed in patent literature 1 converts excess recovered electrical energy, which arises from a running electric vehicle not being used, into alternating current and supplies several station buildings with this alternating current, adjusting the amount of power supplied to each station building. Citation list for patent literature

[0003] Patent literature 1: Unexamined Japanese patent application no. 2017-153191 Summary of the invention: Technical problem

[0004] The power supply adjustment system disclosed in patent literature 1 monitors voltage levels in station buildings located far from a substation and adjusts the amount of power supplied to each station building if, for example, a voltage drop occurs due to a sudden increase in the power consumption of the station building equipment. However, if the power consumption in each station building is low, excess recovered power cannot be used, and therefore effective utilization of the excess recovered power cannot be achieved.

[0005] The present disclosure is made taking into account the above circumstances, and one objective of the present disclosure is to provide an auxiliary power supply device for station buildings and a power supply system that enables the consumption of recovered electrical energy even in the event of fluctuations in electricity consumption by the station building facilities. Solution to the problem

[0006] To achieve the aforementioned objective, an auxiliary power supply device (or auxiliary energy supply device) for station buildings, as described in the present disclosure, is to be connected to a railway power supply line that connects an electric rail vehicle to a railway substation in order to supply the electric rail vehicle with electricity (or electrical energy), and to a plant power supply line that connects a power substation to station building facilities (or equipment) and surrounding facilities (or equipment). The station building facilities are housed in a station building and consume electrical energy, the surrounding facilities are located outside the station building and consume electrical energy, and the power substation supplies the station building facilities and the surrounding facilities with electrical energy.The auxiliary power supply system for the station building comprises a power converter and a power converter controller. The power converter transforms the recovered current (or energy) supplied by the electric rail vehicle via the railway power line into current for supplying the station building equipment and surrounding facilities, and outputs the converted current. The power converter controller monitors the voltage of the railway power supply line and controls the power converter accordingly. If the output power (or current) of the power converter is greater than the current consumption (or power draw), the system switches to a power converter.If the power consumption of the station building systems is less than or equal to the power consumption of the station building systems, the output power of the power converter is supplied to the station building systems and the surrounding systems via the system power supply line, and if the output power of the power converter is equal to or less than the power consumption of the station building systems, the output power of the power converter is supplied to the station building systems via the system power supply line. Advantageous effects of the invention

[0007] The auxiliary power supply device for the station building, as described in this disclosure, is connected to the power supply line that connects the substation to the station building's equipment and the surrounding facilities. If the output power of the power transformer in the auxiliary power supply device for the station building exceeds the power consumption of the station building's equipment, the power transformer's output is supplied to the station building's equipment and the surrounding facilities via a facility power supply line. This configuration allows for the use of recovered electrical energy even in the event of fluctuations in the power consumption of the station building's equipment. Brief description of the drawings Fig. Figure 1 is a block diagram illustrating the configuration of a power supply system according to embodiment 1 of the present disclosure; Fig. Figure 2 is a block diagram illustrating the hardware configuration of an auxiliary power supply device for a station building according to embodiment 1; Fig. Figure 3 is a flowchart illustrating an example of the operation of a renewable power supply by the auxiliary power supply device for the station building according to embodiment 1; Fig. Figure 4 illustrates an example of the electrical power supply by the power supply system according to embodiment 1 to station building facilities and surrounding facilities; Fig. Figure 5 illustrates an example of the output voltage of the auxiliary power supply device for the station building according to embodiment 1; Fig. Figure 6 is a block diagram illustrating a configuration of a power supply system according to embodiment 2; Fig. Figure 7 is a flowchart illustrating an example of the operation of a renewable power supply by an auxiliary power supply device for the station building according to embodiment 2; Fig. Figure 8 shows an example of power supply through the power supply system according to embodiment 2 for station building facilities and the surrounding facilities; Fig. Figure 9 shows another example of power supply through the power supply system according to embodiment 2 for station building facilities and surrounding facilities; Fig. Figure 10 is a block diagram illustrating the configuration of a power supply system according to embodiment 3; Fig. Figure 11 is a flowchart illustrating an example of the operation of a renewable power supply by the power supply system according to embodiment 3; Fig. Figure 12 shows an example of the output voltage of each auxiliary power supply device for station buildings according to embodiment 3; Fig. Figure 13 is a block diagram illustrating a configuration of a first modified example of the power supply system according to the embodiments; Fig. Figure 14 is a block diagram illustrating a configuration of a second modified example of the power supply system according to the embodiments; Fig. Figure 15 is a block diagram illustrating a configuration of a third modified example of the power supply system according to the embodiments; and Fig. Figure 16 is a block diagram illustrating a modified example of the hardware configuration of the auxiliary power supply device for station buildings according to the embodiments. Description of the embodiments

[0008] An auxiliary power supply device for a station building and a power supply system according to embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. In the drawings, identical or corresponding components are assigned the same reference numerals. Design 1

[0009] An auxiliary power supply device for a station building and a power supply system according to embodiment 1 are described by means of examples, including an auxiliary power supply device for a station building that receives recovered electrical energy from an electric rail vehicle of a DC power supply system and supplies electrical energy to station building equipment and surrounding equipment, and a power supply system that includes the auxiliary power supply device for station buildings.

[0010] A power supply system 100, as shown in FIG., is connected to a railway power supply line 92, which connects a railway substation 91 to a rail vehicle 93, which is an electric rail vehicle, and to a facility power supply line 95, which connects a power substation 94 to station building facilities 96 and surrounding facilities 97. The power supply system 100 converts the recovered current supplied by the rail vehicle 93 via the railway power supply line 92 into current for supplying the station building facilities 96 and surrounding facilities 97 and outputs the converted current.

[0011] Railway substation 91 supplies rail vehicle 93 with direct current via railway power supply line 92. Rail vehicle 93 accelerates by driving an electric motor with electric current supplied by railway substation 91 via railway power supply line 92. Rail vehicle 93 feeds the electrical energy generated by the electric motor, which acts as an electric generator during braking, into railway power supply line 92. The electrical energy fed from rail vehicle 93 to railway power supply line 92 is supplied to other rail vehicles (not shown) and to an auxiliary power supply device 1 of the station building, which is part of the power supply system 100.

[0012] The electrical substation 94 supplies alternating current to the station building installations 96 located within a station building and consuming electricity, as well as to the surrounding installations 97 located outside the station building and consuming electricity. The station building installations 96 are electrical installations located within the station building and consuming electrical energy, such as air conditioning systems, lighting fixtures, elevators, and ticket barriers. The surrounding installations 97 are electrical installations located in a commercial establishment around a station and consuming electrical energy, such as air conditioning systems, lighting fixtures, and elevators.

[0013] The plant power supply line 95 is a power line that enables bidirectional power transmission. Specifically, the plant power supply line 95 has a power line of a supply system for delivering power from the power substation 94 and a power line of a renewable energy system for delivering the power supplied by the power supply system 100 to the surrounding facilities 97. With the configuration described above, the electrical energy output by the power substation 94 is delivered to the substation building facilities 96 and the surrounding facilities 97, and the electrical energy output by the power supply system 100 flows from the substation building facilities 96 to the power substation 94 and is then delivered to the surrounding facilities 97.

[0014] The power supply system 100 comprises the auxiliary power supply device 1 for the station building, which converts the recovered power supplied by the rail vehicle 93 via the railway power supply line 92 into power that is supplied to the station building facilities 96 and the surrounding facilities 97, a power meter 21 that measures the amount of power flowing between the power substation 94 and the station building facilities 96, and an output device 22 that detects the amount of external power supplied by the auxiliary power supply device 1 of the station building to the surrounding facilities 97 and displays the detected amount of external power or transmits it to an external device.

[0015] The auxiliary power supply unit 1 of the station building and the station building equipment 96 are both ground equipment under the control of a railway operator, while the surrounding equipment 97 are equipment under the control of another operator, i.e., an operator other than the railway operator. By supplying electricity or energy from the auxiliary power supply unit 1 of the station building to the surrounding equipment 97 under the control of the other operator, the railway operator receives compensation from the other operator based on the external supply quantity. In other words, the railway operator can generate profits by selling surplus recovered energy to the other operator.

[0016] The auxiliary power supply device 1 of the station building has a power converter 11 which converts the recovered current supplied by the rail vehicle 93 via the railway power supply line 92 into current which is supplied to the station building facilities 96 and the surrounding facilities 97, a power converter control unit 12 which controls several switching elements in the power converter 11, and a supply quantity determiner 13 which determines the external supply quantity which corresponds to the quantity of power supplied by the auxiliary power supply device 1 of the station building to the surrounding facilities 97.

[0017] The power converter 11 has a DC / DC converter circuit 14 that converts the high-voltage direct current supplied by the rail vehicle 93 into low-voltage direct current, and a DC / AC converter circuit 15 that converts the low-voltage direct current output by the DC / DC converter circuit 14 into alternating current.

[0018] The power converter control unit 12 monitors a voltage of the railway power supply line 92 and controls the respective switching elements of the DC-DC converter circuit 14 and the DC-AC converter circuit 15 of the power converter 11 according to the voltage of the railway power supply line 92. Specifically, the power converter control unit 12 detects a measured value from a voltmeter (not shown) that measures an input voltage applied to a terminal of the auxiliary power supply device 1 of the station building, which is connected to the railway power supply line 92, and uses the detected measured value as the voltage of the railway power supply line 92, i.e., as the overhead line voltage.

[0019] If the overhead line voltage is higher than or equal to a starting voltage, for example 1,600 V, the power converter controller 12 controls the several switching elements of the power converter 11 to initiate power conversion. The starting voltage is, for example, an upper limit of a target range for the voltage of the railway power supply line 92. The target range is defined by a minimum voltage required to power the rail vehicle 93, a voltage that the railway power supply line 92 can withstand, and the like. The power converter 12 stores information about the upper limit of the target range in advance.

[0020] The power converter controller 12 adjusts the conduction ratio of the switching elements of the DC / DC converter circuit 14 to maintain the output voltage of the DC / DC converter circuit 14 within the target range. The auxiliary power supply device 1 of the station building establishes a mains connection with the plant power supply line 95 and thereby performs control for adjusting the voltage and frequency or the voltage and phase. The power converter controller 12 determines a current command value from a value of the current output by the DC / AC converter circuit 15 and a setpoint value of this current. Based on the current command value, the power converter controller 12 generates gate signals for switching the respective switching elements of the DC / AC converter circuit 15 on and off and outputs the gate signals to the respective switching elements.Through the control of the power converter 11 by the rectifier 12 as described above, the recovered electrical energy supplied by the rail vehicle 93 is converted into alternating current, which is supplied to the station building facilities 96 and the surrounding facilities 97.

[0021] When the power converter controller 12 starts controlling the power converter 1, the supply quantity determiner 13 receives a reading from the power meter 21, which measures the power flowing between the power substation 94 and the station building facilities 96. If the output power of the power converter 11 is greater than the power consumption of the station building facilities 96, a portion of the output current of the power converter 11 is supplied to the surrounding facilities 97 via the facility power supply line 95, which connects the power substation 94 to the surrounding facilities 97. In this case, the supply quantity determiner 13 calculates the external supply quantity, corresponding to the power supplied to the surrounding facilities 97, from the power flowing from the power converter 11 to the power substation 94 as measured by the power meter 21.

[0022] The output device 22 retrieves the external supply quantity from the supply quantity determiner 13 and displays the retrieved external supply quantity or transmits the retrieved external supply quantity to the external device. The external supply quantity corresponds to a quantity of power that is sold by the power supply system 100 to the surrounding facilities 97. The output device 22 transmits the external supply quantity, for example, to an energy management device of the railway operator. This allows the railway operator to record the quantity of electricity or power (or energy) sold with recovered electrical energy.

[0023] Fig. Figure 2 shows a control section of the auxiliary power supply device 1 of the station building with the configuration mentioned above, i.e., the hardware configuration of the power converter controller 12 and the supply flow meter 13. The power converter controller 12 and the supply flow meter 13 each have a processor 81, a memory 82, and an interface 83. The processor 81, the memory 82, and the interface 83 are interconnected via a bus 80. The functions of the components of the converter controller 12 and the supply flow meter 13 are implemented by software, firmware, or a combination of software and firmware. The software and firmware are described in the form of programs and stored in the memory 82. The processor 81 reads and executes the programs stored in the memory 82 to implement the functions of the aforementioned components.That is, memory 82 stores programs for executing the processing of each component of the power converter control 12 or the processing of each component of the supply quantity determiner 13.

[0024] The memory 82 is, for example, a non-volatile or volatile semiconductor memory, such as a random access memory (RAM), a read-only memory (ROM), a flash memory, a erasable programmable read-only memory (EPROM) or an electrically erasable and programmable read-only memory (EEPROM), or a magnetic disk, a flexible disk, an optical disk, a compact disc, a mini disc, or a digital versatile disc (DVD).

[0025] The power converter controller 12 is connected to the power converter 1 via interface 83, in particular to the DC / DC converter circuit 14 and the DC / AC converter circuit 15. The supply quantity determiner 13 is connected to the power meter 21 and the output device 22 via interface 83. Interface 83 has an interface module that conforms to one or more standards suitable for the connection destinations.

[0026] The regenerative power supply provided by the auxiliary power supply device 1 for the station building with the configuration mentioned above is based on Fig. 3 described. At startup, the auxiliary power supply device 1 for the station building begins processing in Fig. 3. The power converter 11 is connected at the beginning of processing in Fig. 3 is assumed to be stopped. The power converter control 12 determines whether an operating condition is met (step S11).

[0027] In embodiment 1, the power converter control 12 monitors the overhead line voltage based on the voltmeter reading and determines whether the overhead line voltage is higher than or equal to the upper limit of the target range, for example, 1600 V. As long as the operating condition is not met, i.e., as long as the overhead line voltage does not reach the upper limit of the target range (No in step S11), the power converter control 12 stops the power converter 11 (step S12). The phrase "stop the power converter 11" also includes keeping the power converter 11 in the stopped state.

[0028] As long as the operating condition is not met and the power transformer 11 is therefore stopped, no electrical energy is supplied from the power transformer 11 to the station building facilities 96 and the surrounding facilities 97. In this situation, the station building facilities 96 and the surrounding facilities 97 are supplied with electricity from the power substation 94, as described in Fig. Power flows FL1 and FL2 are described by dotted lines.

[0029] As in Fig. As shown in Figure 3, the power converter controller 12 controls the power converter 11 when the operating condition is met, in particular when the overhead line voltage reaches the upper limit of the target range (Yes in step S11), and the power converter 11 performs a power conversion (step S13). In step S13, the power converter controller 12 controls the power converter 11 according to the overhead line voltage.

[0030] As in Fig. As shown in Figure 5, the power converter control unit 12 begins controlling the power converter 11 when the overhead line voltage reaches an upper limit V1 of the target range. The power converter control unit 12 increases the output power of the power converter 11 in response to an increase in the overhead line voltage. When the output power of the power converter 11 reaches an upper power limit P1, the power converter control unit 12 performs a control operation to maintain the output power of the power converter 11 at the upper power limit P1 even if the overhead line voltage continues to rise.

[0031] At the start of the power conversion by the power converter 11, electrical current is supplied from the power converter 11 to the station building systems 96, as indicated by the electrical power flow FL3, which is represented by the single dotted line in Fig. 4 is specified. If the output power of the power transformer 11 increases and becomes greater than the power consumption of the station building equipment 96, electrical energy is supplied from the power transformer 11 to the station building equipment 96 and the surrounding equipment 97, as indicated by the electrical power flows FL3 and FL4, which are shown by the single-dotted lines in Fig. 4 will be specified.

[0032] As in Fig. As shown in Figure 3, the supply quantity determiner 13 uses the reading from the power meter 21 to determine whether the output power of the power transformer 11 is greater than the power consumption of the station building equipment 96 (step S14). Specifically, the supply quantity determiner 13 uses the reading from the power meter 21 to determine whether the power flow specified by the power flow FL4 from the power transformer 11 to the surrounding equipment 97 is occurring. If the power flow from the power transformer 11 to the surrounding equipment 97 is occurring, the output power of the power transformer 11 can be considered to be greater than the power consumption of the station building equipment 96.

[0033] If the power flow specified by the power flow FL4 takes place from the power transformer 11 to the surrounding equipment 97, i.e., if the output power of the power transformer 11 is greater than the power consumption of the station building equipment 96 (Yes in step S14), the supply quantity determiner 13 determines as an external supply quantity a power quantity from the power transformer 11 to the surrounding equipment 97, which is specified by the measured value of the power meter 21 (step S15).

[0034] If there is no power flow from the power converter 11 to the surrounding equipment 97, i.e., if the output power of the power converter 11 is equal to or less than the power consumption of the station building equipment 96 (No in step S14), the processing in step S15 is not carried out.

[0035] If the power flow specified by power flow FL4 from power transformer 11 to the surrounding equipment 97 does not take place (No in step S14) or if the processing in step S12 or step S15 is completed, the auxiliary power supply device 1 of the station building terminates the processing of the renewable power supply.

[0036] While activated, the auxiliary power supply device 1 for the station building repeats the aforementioned processing of the renewable power supply at defined intervals. In step S15, the supply quantity determiner 13 determines the external supply quantity in kWh based on the power quantity in kW indicated by the reading of the power meter 21 and the repetition intervals at which the aforementioned processing of the renewable power supply is repeated. For example, the supply quantity determiner 13 determines the external supply quantity in kWh by assuming that the power quantity indicated by the reading of the power meter 21 was delivered over a period corresponding to the repetition intervals.

[0037] If the overhead line voltage decreases and the operating condition is no longer met, after the auxiliary power supply device 1 of the station building has been switched on, the following applies: Fig. 3. If the processing of the renewable power supply shown in step S11 has been repeated and power is supplied from the power converter 11 to the station building facilities 96 and the surrounding facilities 97 (No in step S11), the power converter control 12 causes the power converter 11 to stop operation (step S12), and the auxiliary power supply device 1 for the station building stops the processing of the renewable power supply.

[0038] As described above, the auxiliary power supply device 1 for the station building according to embodiment 1 supplies the station building equipment 96 and the surrounding equipment 97 with electrical energy via the equipment power supply line 95 when the output power of the power transformer 11 in the auxiliary power supply device 1 for the station building is greater than the power consumption of the station building equipment 96. This configuration allows the use of recovered electrical energy even in the event of fluctuations in the power consumption (or energy consumption) of the station building equipment 96.

[0039] As described above, the auxiliary power supply device 1 for the station building supplies the surrounding installations 97 with electricity, determines the external supply quantity corresponding to the power delivered to the surrounding installations 97, and transmits the determined external supply quantity to the output device 22. The railway operator managing the station building in which the auxiliary power supply device 1 for the station building is located can sell power from the auxiliary power supply device 1 for the station building to the surrounding installations 97 and retrieve the external supply quantity, i.e., data indicating the quantity of power sold, from the output device 22. Design 2

[0040] The configuration of the auxiliary power supply device for the station building is not limited to the example above. In embodiment 2, an auxiliary power supply device for the station building is described that includes an energy storage device (or energy storage unit). A Fig. The auxiliary power supply device 2 for the station building shown in Figure 6 comprises, in addition to the components of the auxiliary power supply device 1 for the station building according to embodiment 1, an energy storage device 16 which is charged with current supplied by the power converter 11 and supplies the power converter 11 with current, a charge-discharge control 17 which switches between charging and discharging the energy storage device 16, and a DC-DC converter circuit 18 arranged between the energy storage device 16 and the power converter 11.

[0041] The energy storage device 16 is connected to the power converter 11, more precisely via the DC-DC converter circuit 18 to the output of the DC-DC converter circuit 4. During the charging process, the energy storage device 16 is charged with direct current from the DC-DC converter circuit 14. During the discharging process, the energy storage device 16 supplies the DC-AC converter circuit 15 with direct current.

[0042] The charge-discharge control 17 controls a charge-discharge circuit present in the energy storage device 16 and performs a switching operation between discharging from the energy storage device 16 and charging the energy storage device 16 with the output current of the DC / DC converter circuit 14.

[0043] The DC-DC converter circuit 18 converts the direct current output by the DC-DC converter circuit 14 into electrical energy for charging the energy storage device 16 and supplies the converted electrical energy to the energy storage device 16. The DC-DC converter circuit 18 also converts the direct current resulting from the discharge of the energy storage device 16 into electrical current for supplying the DC-AC converter circuit 15 and supplies the converted electrical current to the DC-AC converter circuit. The DC-DC converter circuit 18 may include a contactor, in particular an electromagnetic DC contactor.

[0044] The hardware configuration of a control section of the auxiliary power supply device 2 for the station building, in particular the hardware configuration of the power converter control 12, the supply quantity determiner 13 and the charge-discharge control 17, is similar to that of the auxiliary power supply device 1 for the station building according to embodiment 1.

[0045] The regenerative power supply provided by the auxiliary power supply device 2 for the station building with the configuration mentioned above is based on Fig. 7 described. The processing in steps S11 to S15 is similar to the processing of the renewable power supply carried out by the auxiliary power supply device 1 for the station building according to embodiment 1, which is described in Fig. 3 is shown.

[0046] Similar to embodiment 1, as long as the operating condition is not met and thus the power transformer 11 is stopped, no electrical current is supplied from the power transformer 11 to the station building facilities 96 and the surrounding facilities 97. In this situation, the station building facilities 96 and the surrounding facilities 97 are supplied with electrical current from the power substation 94, as described in Fig. Power flows FL1 and FL2 are described by dotted lines.

[0047] At the start of the power conversion by the power converter 11, electrical current is supplied from the power converter 11 to the station building equipment 96, as indicated by the power flow FL3, which is represented by the simple dotted line in Fig. 8 is specified. If the output power of the power converter 11 increases and the output power of the power converter 11 becomes greater than the power consumption of the station building equipment 96, electrical current is supplied from the power converter 11 to the station building equipment 96 and the surrounding equipment 97, as described by the electrical power flows FL3 and FL4, which are each represented by the single-dotted lines in Fig. 8 are listed.

[0048] As in Fig. As shown in Figure 7, the charge-discharge control S17 activates the charge-discharge circuit of the energy storage device 16 to charge the energy storage device 16 when the power flow specified by the power flow FL4 from the power converter 11 to the surrounding equipment 97 occurs, i.e., when the output power of the power converter 11 is greater than the power consumption of the station building equipment 96 (Yes in step S14) (step S21). Consequently, as indicated by the single dotted line in Figure 7, the charge-discharge circuit of the energy storage device 16 is activated to charge the energy storage device 16 (step S21). Fig. As described in Figure 8, the power flow FL5 is as follows: electric current is supplied from the DC-DC converter circuit 14 located in the power converter 11 via the DC-DC converter circuit 18 to the energy storage device 16. This results in the energy storage device 16 being charged with the DC energy supplied by the DC-DC converter circuit 14.

[0049] When excess electrical energy or current is available, with the output power of the power converter 11 being supplied to the station building systems 96 and the energy storage device 16 being charged with the electrical energy supplied by the power converter 11, electrical energy is supplied from the power converter 11 to the station building systems 96 and the surrounding systems 97, as represented by the electrical power flows FL3 and FL4, respectively. In other words, when the output power of the power converter 11 is greater than the sum of the electricity consumption of the station building systems 96 and the charging power of the energy storage device 16, electrical current is supplied from the power converter 11 to the station building systems 96 and the surrounding systems 97, charging the energy storage device 16 with the electrical energy supplied by the power converter 11.

[0050] As in Fig. As shown in Figure 7, the supply quantity determiner 13 uses the measured value of the power meter 21 (step S22) to determine whether excess electrical energy is present. If a power flow occurs from the power converter 11 to the surrounding equipment 97 while the energy storage device 16 is being charged, it can be assumed that excess electrical energy is present.

[0051] When the power flow specified by the power flow FL4 from the power converter 11 to the surrounding equipment 97 occurs with the energy storage 16 charged, i.e., when excess power is available (Yes in step S22), the supply quantity determiner 13 receives, as an external supply quantity, a quantity of power supplied by the power converter 11 to the surrounding equipment 97 and specified by the reading of the power meter 21 (step S15).

[0052] If no power flow takes place from the power converter 11 to the surrounding equipment 97 while the energy storage unit 16 is being charged, i.e., if there is no excess power (No in step S22), the processing in step S15 is not carried out.

[0053] If the power flow specified by power flow FL4 from power converter 11 to the surrounding equipment 97 does not occur (No in step S14), the charge-discharge control 17 determines whether the energy storage device 16 is available for discharge (step S23). Specifically, the charge-discharge control 17 determines that the energy storage device 16 is available for discharge if its state of charge is sufficient to power the DC-AC converter circuit 15, for example, 20% or more. If the energy storage device 16 is not available for discharge (No in step S23), the processing in the subsequent steps S24-S28 is not executed.

[0054] When the energy storage device 16 is available for discharge (Yes in step S23), the charge-discharge controller 17 controls the charge-discharge circuit of the energy storage device 16 to discharge the energy storage device 16 (step S24). As a result, as indicated by the single dotted line in Fig. As described in section 9, the power flow FL6 involves the supply of electrical energy from the energy storage device 16 via the DC-DC converter circuit 18 to the DC-AC converter circuit 15 located in the power converter 11. The DC-AC converter circuit 15 converts the direct current supplied by the DC-DC converter circuit 14 and the energy storage device 16 into alternating current and outputs the converted alternating current.

[0055] If the output power of the power converter 11 is greater than the power consumption of the station building equipment 96 when the energy storage 16 is discharged, electrical current is supplied from the power converter 11 to the station building equipment 96 and the surrounding equipment 97, as indicated by the electrical power flows FL3 and FL4, which are represented by the single-dotted lines in Fig. 9 are listed.

[0056] As in Fig. As shown in Figure 7, if the power flow specified by the power flow FL4 from the power converter 11 to the surrounding systems 97 occurs when the energy storage 16 is discharged, i.e., if the output power of the power converter 11 is greater than the electricity consumption of the station building systems 96 (Yes in step S25), the supply quantity determiner 13 determines as an external supply quantity a power quantity that is supplied by the power converter 11 to the surrounding systems 97 and is specified by the measured value of the power meter 21 (step S26).

[0057] If the power flow from the power converter 11 to the surrounding equipment 97 of station 11 does not take place while the energy storage 16 is discharging, i.e., if the output power of the power converter 11 is equal to or less than the electricity consumption of the station building equipment 96 (No in step S25), the processing in step S26 is not carried out.

[0058] The charge-discharge control 17 determines whether the power (or current) from the energy storage device 16 is equal to or less than a lower limit (step S27). The lower limit is determined based on the power of the energy storage device 16 at which the remaining amount of energy in the energy storage device 16 can be considered an amount at which electrical current can be supplied to the DC / AC converter circuit 15.

[0059] If the power (or current) of the energy storage device 16 is equal to or lower than the lower limit (Yes in step S27), the charge-discharge control 17 stops the discharge from the energy storage device 16 (step S28).

[0060] If the power of the energy storage unit 16 is higher than the lower limit (No in step S27), the processing in step S28 is not carried out.

[0061] After completion of the processing in step S12, step S15, or step S27, if there is no power surplus (No in step S22), if the energy storage device 16 is not available for discharge (No in step S23), or if the power of the energy storage device 16 is higher than the lower limit (No in step S27), the auxiliary power supply device 2 for the station building terminates the processing of the renewable power supply. While activated, the auxiliary power supply device 2 for the station building repeats the aforementioned processing at defined intervals. In steps S15 and S26, the supply quantity determiner 13 determines the external supply quantity in kWh based on the power quantity in kW indicated by the reading of the power meter 21 and the repetition intervals at which the aforementioned processing is repeated.

[0062] As described above, the auxiliary power supply device 2 for the station building according to embodiment 2 includes the energy storage device 16 and charges the energy storage device 16 with the electrical energy supplied by the power converter 11 when the output power of the power converter 11 is greater than the power consumption of the station building equipment 96. When the output power of the power converter 11 is equal to or less than the power consumption of the station building equipment 96, the station building equipment 96 is supplied by the power converter 11 with the recovered electrical energy supplied by the rail vehicle 93 and the electrical energy recovered by discharging the energy storage device 16. This configuration allows the consumption of recovered electrical energy even in the event of fluctuations in the power consumption of the station building equipment 96.Even if the recovered electrical energy is small, the electrical energy stored in the energy storage unit 16 enables the supply of electrical energy (or electric current) to the station building facilities 96. embodiment 3

[0063] The power supply system is not limited to the examples mentioned above. In embodiment 3, a power supply system is described that includes several auxiliary power supply devices for station buildings. The one described in Fig. The power supply system 101 shown in Figure 10 includes auxiliary power supply devices 3, 4, and 5 for station buildings, which convert recovered electrical energy into electrical energy to supply it to the station building facilities 96, the surrounding facilities 97, and the surrounding facilities 98, respectively. The power supply system 101 further includes a power meter 21, which measures the amount of power flowing between the power substation 94 and the station building facilities 96; a power meter 23, which measures the amount of power flowing between the power substation 94 and the surrounding facilities 97; and a power meter 24, which measures the amount of power flowing between the power substation 94 and the surrounding facilities 98. For simplicity, the rail vehicle 93 is shown in Fig. 10 not shown.

[0064] The auxiliary power supply device 3 for the station building is connected to the railway power supply line 92 and to the plant power supply line 95, which connects the power substation 94 to the station building facilities 96. The power transformer 11 located in the auxiliary power supply device 3 for the station building comprises the DC-DC converter circuit 14, which converts the recovered current supplied via the railway power supply line 92 into low-voltage direct current, and a station building converter circuit 19, which converts the low-voltage direct current supplied by the DC-DC converter circuit 14 into alternating current in order to supply it to the station building facilities 96.

[0065] The auxiliary power supply device 3 for the station building also has a distribution ratio determiner 20, which determines a distribution ratio on the basis of the electricity consumption of the station building facilities 96, the surrounding facilities 97 and the surrounding facilities 98.

[0066] The power converter control unit 12 retrieves the distribution ratio from the distribution ratio determiner 20 and retrieves measured values ​​from the power meters 21, 23, and 24. The power converter control unit 12 controls the power converter 11 according to the distribution ratio and the measured values ​​of the power meters 21, 23, and 24.

[0067] The supply quantity determiner 13 records output current values ​​from the auxiliary power supply devices 4 and 5 of the station building. From the recorded output current values, the supply quantity determiner 13 calculates an individual supply quantity for each of the surrounding systems 97 and 98, which indicates the amount of power supplied to the surrounding systems.

[0068] The station building converter circuit 19 has a similar configuration to the DC-AC converter circuit 15 of embodiment 1. The station building converter circuit 19 converts the low-voltage DC supplied by the DC-DC converter circuit 14 into AC and delivers the converted AC to the station building equipment 96 via the plant power supply line 95.

[0069] The distribution ratio determiner 20 determines the distribution ratio based on the power consumption of the station building equipment 96, the surrounding equipment 97, and the surrounding equipment 98, and sends an upper power limit according to the determined distribution ratio to each of the power converter controllers 12, 42, and 52. For example, the distribution ratio determiner 20 determines the distribution ratio based on expected values, historical averages, target values, and the like of the power consumption of the station building equipment 96, the surrounding equipment 97, and the surrounding equipment 98. When the power converter controller 12 starts the control of the power converter 11, the distribution ratio determiner 20 sends an operating start instruction to the power converter controllers 42 and 52.

[0070] The auxiliary power supply device 4 of the station building has an ambient converter circuit 41 which converts the low-voltage direct current supplied by the DC / DC converter circuit 14 of the power converter 11 contained in the auxiliary power supply device 3 of the station building into alternating current, and a power converter control 42 which controls the ambient converter circuit 41.

[0071] The ambient converter circuit 41 has a similar configuration to the station building converter circuit 19, i.e. similar to the DC-AC converter circuit 15 of embodiment 1.

[0072] The power converter controller 42 determines a current command value from the current output by the ambient current converter circuit 41 and a setpoint value for this current. Based on the current command value, the power converter controller 42 generates gate signals to switch the respective switching elements of the ambient current converter circuit 41 on and off and outputs the gate signals to the respective switching elements. The power converter controller 42 determines the output power value of the ambient current converter circuit 41 from the phase voltage and phase current output by the ambient current converter circuit 41. The power converter controller 42 sends the determined output current value to the supply quantity determiner 13.

[0073] The auxiliary power supply device 5 for the station building has an ambient converter circuit 51 that converts the low-voltage direct current supplied by the DC / DC converter circuit 14 of the power converter 11 contained in the auxiliary power supply device 3 for the station building into alternating current, and a power converter controller 52 that controls the ambient converter circuit 51.

[0074] The ambient converter circuit 51 has a similar configuration to the station building converter circuit 19, i.e. similar to the DC / AC converter circuit 15 of embodiment 1.

[0075] The power converter controller 52 determines a current command value from the current output by the ambient current converter circuit 51 and a setpoint value for this current. Based on the current command value, the power converter controller 52 generates gate signals to switch the respective switching elements of the ambient current converter circuit 51 on and off and outputs the gate signals to the respective switching elements. The power converter controller 52 determines the output power value of the ambient current converter circuit 51 from the phase voltage and phase current output by the ambient current converter circuit 51. The power converter controller 52 sends the determined output current value to the supply quantity determiner 13.

[0076] Power meter 21 has a similar configuration to power meter 21 of embodiment 1. Power meter 21 sends the measured value to power converter control 12. Power meters 23 and 24 have a similar configuration to power meter 21. Power meter 23 measures the electric current flowing between power substation 94 and the surrounding equipment 97 and sends the measured value to power converter control 12. Power meter 24 measures the electric current flowing between power substation 94 and the surrounding equipment 98 and sends the measured value to power converter control 12.

[0077] The hardware configuration of a control section of the auxiliary power supply devices 3, 4, and 5 of the station building is similar to that of the auxiliary power supply device 1 of the station building according to embodiment 1. Auxiliary power supply device 3 of the station building is connected to auxiliary power supply devices 4 and 5 of the station building via interface 83. Auxiliary power supply devices 4 and 5 of the station building are each connected to auxiliary power supply device 3 of the station building via interface 83.

[0078] The renewable power supply provided by power supply system 101, which has the configuration mentioned above, is powered by Fig. 11 described. When the auxiliary power supply devices 3-5 of the station building are started, the power supply system 101 begins processing in Fig. 11. The power converter 11 located in the auxiliary power supply unit 3 of the station building is switched on at the beginning of processing in Fig. 11 is assumed to be stopped. The processing in steps S11 and S12 is similar to the processing of the renewable power supply provided by the auxiliary power supply unit 1 of the station building according to the in Fig. 3 embodiment 1 is carried out.

[0079] Similar to embodiment 1, as long as the operating condition is not met and thus the power transformer 11 is stopped, no electrical current is supplied from the power transformer 11 located in the auxiliary power supply unit 3 of the station building to the station building equipment 96, and no electrical current is supplied from the auxiliary power supply units 4 and 5 of the station building to the surrounding equipment 97 and the surrounding equipment 98. In this situation, the station building equipment 96, the surrounding equipment 97, and the surrounding equipment 98 are supplied with electricity from the power substation 94, as described in Fig. Power flows FL1, FL2 and FL7 are indicated by dotted lines.

[0080] If the operating condition is met, in particular if the overhead line voltage reaches the upper limit of the target range (Yes in step S11), the distribution ratio determiner 20 determines the distribution ratio (step S31). The distribution ratio determiner 20 sends a notification to each of the power transformer controllers 12, 42 and 52 about the upper power limit or current limit according to the determined distribution ratio.

[0081] The power converter controller 12 controls the power converter 11 according to the distribution ratio, causing the power converter 11 to perform a power conversion (step S13). Specifically, the power converter controller 12 controls the DC / DC converter circuit 14, similar to embodiment 1. The power converter controller 12 controls the station building converter circuit 19 according to the distribution ratio. The station building converter circuit 19 supplies the station building equipment 96 with electrical energy that is equal to or less than the upper power limit, according to the distribution ratio. When the power converter controller 12 starts controlling the power converter 11, the distribution ratio determiner 20 sends an operating start command to the power converter controllers 42 and 52, which are located in the auxiliary power supply devices 4 and 5 of the station building.

[0082] After the power conversion is started by the power converter 11, electrical current is supplied from the power converter 11 to the station building systems 96, as indicated by the electrical power flow FL3, which is shown by the single dotted line in Fig. 10 is specified. When power conversion begins by the ambient current converter circuit 41 located in the auxiliary power supply unit 4 of the station building, electrical current is supplied from the auxiliary power supply unit 4 of the station building to the surrounding equipment 97, as described by the power flow FL4, indicated by a single dotted line. When current conversion begins by the ambient current converter circuit 51 located in the auxiliary power supply unit 5 of the station building, electrical current is supplied from the auxiliary power supply unit 5 of the station building to the surrounding equipment 98, as described by the power flow FL8, indicated by a single dotted line.

[0083] The upper power limit according to the distribution ratio is lower than the upper power limit P1 of the output power of the auxiliary power supply device 1 for the station building according to embodiment 1. For example, as in Fig. As shown in Figure 12, the control of the power converter 11 by the power converter control 12, which is present in the auxiliary power supply device 3 of the station building, causes a gradual increase of the output current of the power converter 11, which leads to an increase to an upper power limit P1' which is less than the upper power limit P1 of the output current of the auxiliary power supply device 1 of the station building according to embodiment 1.

[0084] Upon receiving the start-up command, the power converter controllers 42 and 52 located in the auxiliary power supply devices 4 and 5 of the station building initiate the control of the ambient current converter circuit 41 and 51. The control of the ambient current converter circuit 41 and 51 by the power converter controllers 42 and 52 causes a gradual increase in the output current of the ambient current converter circuits 41 and 51, resulting in an increase up to an upper power limit P2' that is lower than the upper power limit P1 of the output current of the auxiliary power supply device 1 for the station building according to embodiment 1.

[0085] As in Fig. As shown in Figure 11, the supply quantity determiner 13 determines the individual supply quantity from the output power values ​​recorded by the power converter controls 42 and 52 for each of the surrounding systems 97 and the surrounding systems 98, which indicates a quantity of power supplied to the surrounding systems (step S32).

[0086] The power converter control 12 determines, based on the measured values ​​of the power meters 21, 23 and 24, whether the output power of each of the auxiliary power supply devices 3, 4 and 5 of the station building is greater than the power consumption of the corresponding systems of the station building systems 96, the surrounding systems 97 and the surrounding systems 98 (step S33).

[0087] Specifically, the power converter control unit 12 determines, based on the measured value of the power meter 21, whether a power flow from the power converter 11, located in the auxiliary power supply unit 3 of the station building, to the power substation 94 takes place. If the power flow from the power converter 11 to the power substation 94 takes place, the output power of the auxiliary power supply unit 3 of the station building can be considered to be greater than the power consumption of the station building equipment 96.

[0088] Similarly, the power converter control 12 determines, based on the reading from the power meter 23, whether a power flow is taking place from the ambient power converter circuit 41 located in the auxiliary power supply unit 4 of the station building towards the power substation 94. If a power flow from the ambient power converter circuit 41 to the power substation 94 takes place, the output power of the auxiliary power supply unit 4 of the station building can be considered to be greater than the power consumption of the surrounding equipment 97.

[0089] Similarly, the power converter control 12 determines, based on the measured value of the power meter 24, whether a power flow occurs from the ambient power converter circuit 51 located in the auxiliary power supply unit 5 of the station building to the power substation 94. If a power flow occurs from the ambient power converter circuit 51 to the power substation 94, the output power of the auxiliary power supply unit 5 of the station building can be considered to be greater than the power consumption of the surrounding equipment 98.

[0090] If the output power of the auxiliary power supply device 3 of the station building is greater than the power consumption of the station building equipment 96, the output power of the auxiliary power supply device 4 of the station building is greater than the power consumption of the surrounding equipment 97, or the output power of the auxiliary power supply device 5 of the station building is greater than the power consumption of the surrounding equipment 98 (Yes in step S33), the power converter control 12 reduces the power of one of the auxiliary power supply devices 3, 4, and 5 of the station building (step S34).

[0091] For example: If the output power of the auxiliary power supply device 3 of the station building is greater than the power consumption of the station building equipment 96, while the output powers of the auxiliary power supplies 4 and 5 of the station building are less than the power consumption of the surrounding equipment 97 and the surrounding equipment 98, the power converter control 12 adjusts the distribution ratio to reduce the electrical power supplied to the station building converter circuit 19 and to increase the electrical power supplied to the surrounding converter circuits 41 and 51. This reduces the power of the auxiliary power supply device 3 of the station building and thus suppresses the supply of electrical power from the auxiliary power supply device 3 of the station building to the power substation 94.

[0092] After completion of the processing in step S12 or step S34, or if the output power of each of the auxiliary power supply devices 3, 4, and 5 of the station building is equal to or less than the power consumption of the corresponding equipment of the station building equipment 96, the surrounding equipment 97, and the surrounding equipment 98 (No in step S33), the power supply system 101 terminates the processing of the renewable power supply. While the auxiliary power supply devices 3-5 of the station building are activated, the power supply system 101 repeats the aforementioned processing at defined intervals. In step S32, the supply quantity determiner 13 determines the individual supply quantity in kWh based on the power quantity in kW indicated by the recorded output power values ​​and the repetition intervals at which the aforementioned processing is repeated.

[0093] As described above, the power supply system 101 according to embodiment 3 includes the auxiliary power supply devices 3, 4 and 5 of the station building and can supply the station building equipment 96, the surrounding equipment 97 and the surrounding equipment 98 with the recovered energy from the auxiliary power supply devices 3, 4 and 5 of the station building. Due to this configuration, the recovered electrical energy can also be consumed by the surrounding equipment 97 and the surrounding equipment 98 even when the power consumption of the station building equipment 96 is low.

[0094] The embodiments described above are not to be understood as limiting the scope of the present disclosure. The embodiments described above can be freely combined. As an example, the auxiliary power supply devices 3-5 of the station building can include the energy storage device 16 and the charge-discharge control 17.

[0095] The configuration of the power supply systems 100 and 101 is not limited to the examples mentioned above and can be any configuration that enables the supply of the recovered electrical energy to the station building facilities 96, the surrounding facilities 97, and the surrounding facilities 98. For example, the method for distributing the power to the station building's multiple auxiliary power supply devices in power supply system 101 is not limited to the example mentioned above. Fig. The power supply system 101 shown in Figure 13 has auxiliary power supply devices 6, 7 and 8 for the station building, each of which is connected to the railway power supply line 92. For the sake of simplicity, the rail vehicle 93 is shown in Fig. 13 not shown.

[0096] The auxiliary power supply device 6 for station buildings has a similar configuration to the auxiliary power supply device 3 for station buildings. The power converter 11 contained in the auxiliary power supply device 6 for station buildings includes the DC / DC converter circuit 14 and the station building converter circuit 19.

[0097] The auxiliary power supply device 7 for station buildings, in addition to the components of the auxiliary power supply device 4 for station buildings, includes a DC / DC converter circuit 43, which is connected to the railway power supply line 92. The DC / DC converter circuit 43 is controlled by the power converter controller 42 and converts the recovered current supplied by the rail vehicle 93 via the railway power supply line 92 into low-voltage direct current. The DC / DC converter circuit 43 supplies the ambient converter circuit 41 with the low-voltage direct current. For simplicity, the arrows from the power converter controller 42 to the ambient converter circuit 41 and to the DC / DC converter circuit 43 are shown in Fig. 13 not shown.

[0098] The auxiliary power supply device 8 for a station building, in addition to the components of the auxiliary power supply device 5 for the station building, includes a DC / DC converter circuit 53, which is connected to the railway power supply line 92. The DC / DC converter circuit 53 is controlled by the power converter controller 52 and converts the recovered electrical energy supplied by the rail vehicle 93 via the railway power supply line 92 into low-voltage direct current. The DC / DC converter circuit 53 supplies the ambient converter circuit 51 with the low-voltage direct current. For simplicity, the arrows from the power converter controller 52 to the ambient converter circuit 51 and to the DC / DC converter circuit 53 are shown in Fig. 13 not shown.

[0099] The power converter controller 12 controls the DC / DC converter circuit 14 and the station building converter circuit 19 based on the upper power limit according to the distribution ratio determined by the distribution ratio determiner 20. The power converter controller 42 controls the DC / DC converter circuit 43 and the ambient converter circuit 41 based on the upper power limit according to the distribution ratio determined by the distribution ratio determiner 20. The power converter controller 52 controls the DC / DC converter circuit 53 and the ambient converter circuit 51 based on the upper power limit according to the distribution ratio determined by the distribution ratio determiner 20.

[0100] As another example, as in Fig. Figure 14 shows a power supply system 102 comprising an auxiliary power supply device 9 for a station building, which includes some of the components of the auxiliary power supply device 3 for the station building, and a floor-mounted device 71, which includes the supply flow meter 13 and the distribution ratio meter 20. The supply flow meter 13 and the distribution ratio meter 20 present in the floor-mounted device 71 are similar to the supply flow meter 13 and the distribution ratio meter 20 present in the auxiliary power supply device 3 for the station building.The power converter control 12, the DC / DC converter circuit 14, and the station building converter circuit 19, which are present in the auxiliary power supply device 9 for the station building, are similar to the power converter control 12, the DC / DC converter circuit 14, and the station building converter circuit 19, which are present in the auxiliary power supply device 3 for the station building. The floor-mounted device 71 is a separate device from the auxiliary power supply device 9 for the station building.

[0101] As a further example, the auxiliary power supply devices 3, 4, and 5 for the station building can be implemented by a single auxiliary power supply device 3 for the station building. In this configuration, the auxiliary power supply device 3 for the station building also includes the ambient current converter circuits 41 and 51 as well as the power converter controllers 42 and 52.

[0102] The operating conditions for the operation of the renewable energy processing system are not limited to the aforementioned example. For instance, the power converter controller 12 can determine whether the overhead line voltage exhibits an upward trend and, if so, control the power converter 11 to begin power conversion. In this configuration, the power converter controller 12 controls the power converter 11 until the overhead line voltage reaches the lower limit of the target range.

[0103] The supply quantity determiner 13, located in the auxiliary power supply devices 1 and 2 of the station building, can record the power consumption of the station building equipment 96 and determine the external supply quantity from the measured value of the power meter 21 and the power consumption of the station building equipment 96. Specifically, the supply quantity determiner 13 can use as the external supply quantity a value obtained by subtracting the result of subtracting the power flowing from the power substation 94 to the station building equipment 96 from the power consumption of the station building equipment 96 from the output power of the power transformer 11.

[0104] As in Fig. As shown in Figure 15, the power supply system 100 can be connected to the power substation 94 via a reverse power relay 99 in order to suppress the power flow to the power substation 94.

[0105] The number of surrounding installations can be freely chosen. For example, the auxiliary power supply device 1 of the station building can supply power to several destinations via the plant power supply line 95, each of which is a surrounding installation.

[0106] Power supply systems 100, 101, and 102 can receive recovered electrical energy from a rail vehicle 93 of an AC power supply system. In this configuration, the auxiliary power supply devices 1-9 for the station building have a transformer that steps down high-voltage AC current and an AC / DC converter circuit that converts the stepped-down AC current into DC current.

[0107] The hardware configuration of the auxiliary power supply devices 1-9 of the station building is not limited to the examples mentioned above. Fig. Figure 16 shows a modified example of the hardware configuration of the auxiliary power supply devices 1-9 of the station building. As in Fig. As shown in Figure 16, the control section of the auxiliary power supply devices 1-9 of the station building can be implemented by a processing circuit 84. For example, the power converter circuit 12 located in the auxiliary power supply device 1 of the station building is connected via an interface circuit 85 to the power converter 11, in particular to the DC-DC converter circuit 14 and the DC-AC converter circuit 15. The supply quantity meter 13 located in the auxiliary power supply device 1 of the station building is connected via the interface circuit 85 to the power meter 21 and the output device 22.

[0108] If the processing circuit 84 is dedicated hardware, then the processing circuit 84 is an example of a single circuit, a combined circuit, a processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination thereof. Each component of the auxiliary power supply devices 1-9 of the station building can be implemented by a dedicated processing circuit 84 or by a shared processing circuit 84.

[0109] Part of each function of the control section of the auxiliary power supply devices 1-9 for the station building can be implemented by dedicated hardware, and another part by software or firmware. For example, in the auxiliary power supply device 1 for the station building according to embodiment 1, the power converter control 12 can be implemented by the Fig. 16 shown processing circuit 84 and the supply quantity determination 13 by the in Fig. 2 shown processor 81, which reads and executes the programs stored in memory 82.

[0110] The foregoing describes some exemplary embodiments for illustrative purposes. Although the preceding discussion includes specific embodiments, it will be clear to those skilled in the art that changes in form and detail can be made without departing from the general spirit and scope of the invention. Accordingly, the description and drawings should be regarded as illustrative rather than limiting. This detailed description is therefore not to be understood in a restrictive sense, and the scope of the invention is defined solely by the claims and by the entire range of equivalents to which those claims refer. Reference symbol list 1, 2, 3, 4, 5, 6, 7, 8, 9 Auxiliary power supply device for a station building 11 power converters 12, 42, 52 Power converter control 13 Supply quantity determiners 14, 18, 43, 53 DC / DC converter circuit 15 DC / AC converter circuit 16 Energy storage 17 Charging / unloading control 19 Station building converter circuit 20 distribution ratio determiners 21, 23, 24 power meters 22 Output device 41, 51 Environmental converter circuit 71 Ground-based device 80 Bus 81 processor 82 memory 83 Interface 84 Processing circuit 85 Interface circuit 91 Railway substation 92 Railway power supply line 93 Rail vehicle 94 Power substation 95 Plant power supply line 96 station building complexes 97, 98 surrounding facilities 99 reverse current relays 100, 101, 102 Power supply system MC1 Schütz QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2017

[0003] JP 153191

[0003]

Claims

[1] Auxiliary power supply device for a station building, for connection to a railway power supply line connecting an electric rail vehicle to a railway substation to supply the electric rail vehicle with electrical energy, and to a plant power supply line connecting a power substation to station building facilities and surrounding facilities, wherein the station building facilities are located in a station building and consume electrical energy, the surrounding facilities are located outside the station building and consume electrical energy, the power substation serves to supply the station building facilities and the surrounding facilities with electrical energy, wherein the auxiliary power supply device for the station building comprises: a power converter for converting recovered energy supplied by the electric rail vehicle via the railway power supply line into energy for supplying the station building facilities and the surrounding facilities, and for outputting the converted energy; and a power converter control for monitoring a voltage of the railway power supply line and for controlling the power converter according to the voltage of the railway power supply line, wherein If the output power of the power converter is greater than the power consumption of the station building equipment, the output power of the power converter is supplied to the station building equipment and the surrounding equipment via the plant power supply line, and if the output power of the power converter is equal to or less than the power consumption of the station building equipment, the output power of the power converter is supplied to the station building equipment via the plant power supply line. [2] Auxiliary power supply device for the station building according to claim 1, further comprising: an energy storage device connected to the power converter, wherein If the output power of the power converter is greater than the power consumption of the station building systems, the output power of the power converter is supplied to the station building systems via the system power supply line and the energy storage is charged with electrical energy supplied by the power converter. [3] Auxiliary power supply device for the station building according to claim 2, wherein if the output power of the power converter is greater than the sum of the power consumption of the station building installations and a charging power of the energy storage, the output power of the power converter is supplied to the station building installations and the surrounding installations via the installation power supply line and the energy storage is charged with the electrical energy supplied by the power converter. [4] Auxiliary power supply device for the station building according to claim 2 or 3, wherein if the output power of the power converter is equal to or less than the power consumption of the station building equipment, the power converter converts the electrical energy supplied by the energy storage device into electrical energy to supply the station building equipment and the surrounding equipment and outputs the converted electrical energy. [5] Auxiliary power supply device for the station building according to any one of claims 1 to 4, wherein when the power converter is stopped as soon as the voltage of the railway power supply line reaches an upper limit of a target range, the power converter control controls the power converter so that it starts the power conversion by the power converter. [6] Auxiliary power supply device for the station building according to any one of claims 1 to 4, wherein when the power converter is stopped, the power converter control determines whether the voltage of the railway power supply line has an upward trend, and upon finding that the voltage of the railway power supply line has an upward trend, controls the power converter so that the power conversion by the power converter starts. [7] Auxiliary power supply device for the station building according to any one of claims 1 to 6, further comprising: a supply quantity determiner to determine, from a quantity of power flowing between the power substation and the station building facilities, an external supply quantity that corresponds to a quantity of power supplied to the surrounding facilities when the output power of the power converter is greater than the power consumption of the station building facilities. [8] Auxiliary power supply device for the station building according to any one of claims 1 to 6, further comprising: a distribution ratio determiner for determining a distribution ratio for the distribution of the recovered electrical energy to the station building facilities and the surrounding facilities, wherein the power transformer has a station building converter circuit to convert the recovered electrical energy into electrical energy that is supplied to the station building facilities according to the distribution ratio, and to supply the converted electrical energy to the station building facilities, and an ambient energy converter circuit for converting the recovered electrical energy into electrical energy to supply the surrounding systems according to the distribution ratio and for delivering the converted electrical energy to the surrounding systems. [9] Auxiliary power supply device for the station building according to claim 8, wherein the distribution ratio determiner determines the distribution ratio based on the power consumption of the station building facilities and a power consumption of the surrounding facilities. [10] Auxiliary power supply device for the station building according to claim 8 or 9, further comprising: a supply quantity determiner to determine an individual supply quantity from an output power value of the environmental converter circuit, which corresponds to a quantity of power supplied to the surrounding systems. [11] Power supply system comprising: an auxiliary power supply device for a station building, which is connected to a railway power supply line connecting a railway substation to an electric rail vehicle to supply the electric rail vehicle with electrical power, and to an installation power supply line connecting a power substation to station building installations and surrounding installations, wherein the station building installations are located in a station building and consume electrical power, the surrounding installations are located outside the station building and consume electrical power, and the power substation serves to supply the station building installations and the surrounding installations with electrical power; and a power meter for measuring the amount of power flowing between the power substation and the station building facilities, wherein the auxiliary power supply device for the station building a power converter for converting recovered electrical energy supplied by the electric rail vehicle via the railway power supply line into electrical energy for supplying the station building facilities and the surrounding facilities, and for outputting the converted electrical energy, and a power converter control unit for monitoring the voltage of the railway power supply line and for controlling the power converter according to the voltage of the railway power supply line, and If the output power of the power converter is greater than the power consumption of the station building equipment, the output power of the power converter is supplied to the station building equipment and the surrounding equipment via the plant power supply line, and if the output power of the power converter is equal to or less than the power consumption of the station building equipment, the output power of the power converter is supplied to the station building equipment via the plant power supply line. [12] Power supply system according to claim 11, wherein the auxiliary power supply device for the station building further comprises a supply quantity determiner to obtain from a measured value of the power meter an external supply quantity corresponding to a power quantity supplied to the surrounding equipment when the output power of the power converter is greater than the power consumption of the station building equipment. [13] Power supply system comprising: Auxiliary power supply devices for a station building, connected to a railway power supply line that connects a railway substation to an electric rail vehicle to supply power to the electric rail vehicle, and connected to plant power supply lines that each connect a power substation to station building facilities or surrounding facilities, wherein the station building facilities are located in a station building and consume electrical energy, the surrounding facilities are located outside the station building and consume electrical energy, and the power substation supplies electrical energy to the station building facilities and the surrounding facilities, wherein each of the auxiliary power supply devices for a station building a power converter for converting recovered electrical energy supplied by the electric rail vehicle via the railway power supply line into electrical energy for supplying the station building facilities or the surrounding facilities and for outputting the converted electrical energy, and a power converter control unit for monitoring the voltage of the railway power supply line and for controlling the power converter according to the voltage of the railway power supply line. [14] Power supply system according to claim 13, wherein an auxiliary power supply device of the auxiliary power supply devices for station buildings, which is connected to the plant power supply line that connects the power substation to the station building facilities, has a distribution ratio determiner for determining a distribution ratio for the distribution of the recovered electrical energy to the individual station building facilities and the surrounding facilities, and a station building converter circuit to convert the recovered electrical energy into electrical energy to supply the station building equipment according to the distribution ratio and to supply the converted electrical energy to the station building equipment, and wherein an auxiliary power supply device of the auxiliary power supply devices for station buildings, which is connected to the plant power supply line connecting the power substation to the surrounding equipment, has an ambient converter circuit to convert the recovered electrical energy into electrical energy to supply it to the surrounding equipment according to the distribution ratio, and to supply the converted electrical energy to the surrounding equipment. [15] Power supply system according to claim 13, wherein an auxiliary power supply device of the auxiliary power supply devices for station buildings, which is connected to the plant power supply line that connects the power substation to the station building facilities, has a distribution ratio determiner to determine a distribution ratio for the distribution of the recovered electrical energy to each of the station building facilities and the surrounding facilities, Each of the auxiliary power supply devices for station buildings is connected to the railway power supply line, and Each of the auxiliary power supply devices in the station building has a load converter control unit that controls the power converter according to the distribution ratio. [16] Power supply system according to any one of claims 13 to 15, further comprising: Power meters for measuring the amount of power flowing between the power substation and the station building facilities or the surrounding facilities, wherein at least one of the auxiliary power supply devices in the station building must have a supply quantity determiner in order to obtain an individual supply quantity from the measured values ​​of the power meters for each surrounding system, which corresponds to a quantity of power supplied to the surrounding systems. [17] Power supply system according to claim 16, further comprising: an output device for recording the individual supply quantity determined by the supply quantity determiner and for displaying the recorded individual supply quantity or for transferring the recorded individual supply quantity to an external device.

Images