阅读说明：本技术 牵引供电系统中的能量管理装置及牵引供电系统 (Energy management device in traction power supply system and traction power supply system ) 是由 王大杰 陈鹰 唐英伟 李胜飞 李玉光 任静 王存岗 郝立佳 于 2021-07-30 设计创作，主要内容包括：本发明适用于电气化铁路技术领域,提供了一种牵引供电系统中的能量管理装置及牵引供电系统,该装置包括：第一功率指令计算单元、第二功率指令计算单元、中央处理单元、α相母线信号采集模块、β相母线信号采集模块、α相馈线信号采集模块和β相馈线信号采集模块；第一功率指令计算单元用于根据α相馈线信号和α相母线信号计算α相功率；第二功率指令计算单元用于根据β相馈线信号和β相母线信号计算β相功率；中央处理单元用于根据α相功率和β相功率生成用于控制铁路功率调节器进行能量管理的能量控制指令。本申请通过采集馈线信号计算α相功率和β相功率,能够避免线路上新增储能装置后采集工况不准确的问题,提高信号采集准确性。(The invention is suitable for the technical field of electrified railways, and provides an energy management device in a traction power supply system and the traction power supply system, wherein the device comprises: the system comprises a first power instruction calculating unit, a second power instruction calculating unit, a central processing unit, an alpha-phase bus signal acquisition module, a beta-phase bus signal acquisition module, an alpha-phase feeder signal acquisition module and a beta-phase feeder signal acquisition module; the first power instruction calculating unit is used for calculating alpha-phase power according to the alpha-phase feeder line signal and the alpha-phase bus signal; the second power instruction calculating unit is used for calculating beta-phase power according to the beta-phase feeder line signal and the beta-phase bus signal; and the central processing unit is used for generating an energy control instruction for controlling the railway power regulator to perform energy management according to the alpha-phase power and the beta-phase power. According to the method and the device, the alpha-phase power and the beta-phase power are calculated by collecting the feeder line signals, the problem that the collecting working condition is inaccurate after an energy storage device is newly added on a line can be avoided, and the signal collecting accuracy is improved.)

1. An energy management device in a traction power supply system, comprising: the system comprises a first power instruction calculating unit, a second power instruction calculating unit, a central processing unit, an alpha-phase bus signal acquisition module arranged on an alpha-phase bus of a traction substation, a beta-phase bus signal acquisition module arranged on a beta-phase bus of the traction substation, an alpha-phase feeder line signal acquisition module arranged on a feeder line of the alpha-phase bus and a beta-phase feeder line signal acquisition module arranged on a feeder line of the beta-phase bus;

the alpha-phase bus signal acquisition module and the alpha-phase feeder signal acquisition module are respectively connected with the first power instruction calculation unit, and the beta-phase bus signal acquisition module and the beta-phase feeder signal acquisition module are respectively connected with the second power instruction calculation unit; the first power instruction calculating unit and the second power instruction calculating unit are respectively connected with the central processing unit;

the alpha-phase bus signal acquisition module is used for acquiring an alpha-phase bus signal, the beta-phase bus signal acquisition module is used for acquiring a beta-phase bus signal, and the alpha-phase feeder signal acquisition module is used for acquiring an alpha-phase feeder signal; the beta-phase feeder line signal acquisition module is used for acquiring beta-phase feeder line signals;

the first power instruction calculating unit is used for calculating alpha-phase power according to the alpha-phase feeder line signal and the alpha-phase bus signal and sending the alpha-phase power to the central processing unit;

the second power instruction calculating unit is used for calculating beta-phase power according to the beta-phase feeder line signal and the beta-phase bus signal and sending the beta-phase power to the central processing unit;

the central processing unit is used for generating an energy control instruction according to the alpha-phase power and the beta-phase power, and the energy control instruction is used for controlling the traction power supply system to perform energy management.

2. The energy management device in a traction power supply system as claimed in claim 1, wherein said alpha phase bus signal comprises an alpha phase bus voltage; the alpha phase feeder signal comprises an alpha phase feeder current;

the alpha-phase feeder line signal acquisition module comprises alpha-phase feeder line current acquisition units which are respectively arranged on a plurality of feeder lines of the alpha-phase bus and used for acquiring alpha-phase feeder line currents of the corresponding feeder lines; the alpha-phase bus signal acquisition module comprises an alpha-phase bus voltage acquisition unit for acquiring the alpha-bus voltage;

the first power instruction calculation unit is specifically configured to:

and calculating the feeder line power corresponding to each feeder line of the alpha-phase bus according to the alpha-phase bus voltage and each alpha-phase feeder line current, and summing the feeder line power corresponding to each feeder line of the alpha-phase bus to obtain the alpha-phase power.

3. The energy management device in a traction power supply system according to claim 2, wherein the α -phase feeder current collection unit includes a current transformer; the alpha-phase bus voltage acquisition unit comprises a voltage transformer.

4. The energy management device in a traction power supply system as claimed in claim 1, wherein said β -phase bus signal comprises a β -phase bus voltage; the beta-phase feeder signal comprises a beta-phase feeder current;

the beta-phase feeder line signal acquisition module comprises beta-phase feeder line current acquisition units which are respectively arranged on a plurality of feeder lines of a beta-phase bus and used for acquiring beta-phase feeder line currents of corresponding feeder lines; the beta-phase bus signal acquisition module comprises a beta-phase bus voltage acquisition unit for acquiring beta-phase bus voltage;

the second power instruction calculation unit is specifically configured to:

and calculating the feeder power corresponding to each feeder of the beta-phase bus according to the beta-phase bus voltage and the beta-phase feeder current, and summing the feeder power corresponding to each feeder of the beta-phase bus to obtain the beta-phase power.

5. The energy management device in a traction power supply system according to claim 4, wherein the β -phase feeder current collection unit includes a current transformer; the beta-phase bus voltage acquisition unit comprises a voltage transformer.

6. The energy management device in a traction power supply system as set forth in claim 1, wherein said first power command calculation unit comprises an electric energy meter.

7. The energy management device in a traction power supply system as set forth in claim 1, wherein said second power command calculation unit comprises an electric energy meter.

8. An energy management arrangement in a traction power supply system as claimed in any one of claims 1 to 7, wherein the alpha phase bus signal comprises an alpha phase bus current and an alpha phase bus voltage; the beta-phase bus signal comprises beta-phase bus current and beta-phase bus voltage;

the alpha-phase bus signal acquisition module comprises an alpha-phase bus current acquisition unit for acquiring the alpha-phase bus current and an alpha-phase bus voltage acquisition unit for acquiring the alpha-phase bus voltage, and the beta-phase bus signal acquisition module comprises a beta-phase bus current acquisition unit for acquiring the beta-phase bus current and a beta-phase bus voltage acquisition unit for acquiring the beta-phase bus voltage;

the first power instruction calculating unit is further used for calculating alpha-phase bus power according to the alpha-phase bus current and the alpha-phase bus voltage and sending the alpha-phase bus power to the central processing unit;

the second power instruction calculating unit is further used for calculating beta-phase bus power according to the beta-phase bus current and the beta-phase bus voltage and sending the beta-phase bus power to the central processing unit;

and the central processing unit is also used for checking the correctness of the energy control instruction according to the alpha-phase bus power and the beta-phase bus power.

9. The energy management device in a traction power supply system as claimed in claim 8, wherein said α -phase bus current collection unit comprises a current transformer and said β -phase bus current collection unit comprises a current transformer.

10. A traction power supply system comprising an energy storage device, a railway power conditioning device, a traction network and an energy management device as claimed in any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of electrified railways, and particularly relates to an energy management device in a traction power supply system and the traction power supply system.

Background

Electrified railways belong to a large group of industrial users with distinct characteristics, and traction power supply systems as typical impact loads always affect national power grids. At present, the electrified railway mainly has the conditions of low electric energy quality, waste of regenerated electric energy and the like, so that the important importance of railway construction operation planning is to ensure the railway power supply quality, ensure safe and stable operation and realize the railway energy conservation and efficiency improvement.

At present, the collection method for electrified railway energy management generally judges the working condition on a line by collecting voltage and current signals on a power supply bus of a substation, but the collection mode of the line with a newly-added energy storage device cannot accurately determine the working condition of the line, so that the condition that the working condition judgment is inaccurate exists.

Disclosure of Invention

In view of this, the embodiment of the present invention provides an energy management device in a traction power supply system and the traction power supply system, so as to solve the problem in the prior art that when a bus voltage and current signal of a traction substation is collected to judge a line working condition, the judgment accuracy is poor.

A first aspect of an embodiment of the present invention provides an energy management device in a traction power supply system, including:

the system comprises a first power instruction calculating unit, a second power instruction calculating unit, a central processing unit, an alpha-phase bus signal acquisition module arranged on an alpha-phase bus of a traction substation, a beta-phase bus signal acquisition module arranged on a beta-phase bus of the traction substation, an alpha-phase feeder line signal acquisition module arranged on a feeder line of the alpha-phase bus and a beta-phase feeder line signal acquisition module arranged on a feeder line of the beta-phase bus;

the alpha-phase bus signal acquisition module and the alpha-phase feeder signal acquisition module are respectively connected with the first power instruction calculation unit, and the beta-phase bus signal acquisition module and the beta-phase feeder signal acquisition module are respectively connected with the second power instruction calculation unit; the first power instruction calculating unit and the second power instruction calculating unit are respectively connected with the central processing unit;

the system comprises an alpha-phase bus signal acquisition module, a beta-phase bus signal acquisition module and an alpha-phase feeder line signal acquisition module, wherein the alpha-phase bus signal acquisition module is used for acquiring an alpha-phase bus signal, the beta-phase bus signal acquisition module is used for acquiring a beta-phase bus signal, and the alpha-phase feeder line signal acquisition module is used for acquiring an alpha-phase feeder line signal; the beta-phase feeder line signal acquisition module is used for acquiring beta-phase feeder line signals;

the first power instruction calculating unit is used for calculating alpha-phase power according to the alpha-phase feeder line signal and the alpha-phase bus signal and sending the alpha-phase power to the central processing unit;

the second power instruction calculation unit is used for calculating beta-phase power according to the beta-phase feeder line signal and the beta-phase bus signal and sending the beta-phase power to the central processing unit;

the central processing unit is used for generating an energy control instruction according to the alpha-phase power and the beta-phase power, and the energy control instruction is used for controlling a railway power regulator of the traction power supply system to manage energy.

In one embodiment, the alpha phase bus signal comprises an alpha phase bus voltage; the alpha phase feeder signal comprises an alpha phase feeder current;

the alpha-phase feeder line signal acquisition module comprises alpha-phase feeder line current acquisition units which are respectively arranged on a plurality of feeder lines of the alpha-phase bus and used for acquiring alpha-phase feeder line currents of the corresponding feeder lines; the alpha-phase bus signal acquisition module comprises an alpha-phase bus voltage acquisition unit for acquiring alpha-phase bus voltage;

the first power instruction calculation unit is specifically configured to:

and calculating the feeder line power corresponding to each feeder line of the alpha-phase bus according to the alpha-phase bus voltage and each alpha-phase feeder line current, and summing the feeder line power corresponding to each feeder line of the alpha-phase bus to obtain the alpha-phase power.

In one embodiment, the alpha-phase feeder current collection unit comprises a current transformer; the alpha-phase bus voltage acquisition unit comprises a voltage transformer.

In one embodiment, the beta phase bus signal comprises a beta phase bus voltage; the beta-phase feeder line signal comprises beta-phase feeder line current;

the beta-phase feeder line signal acquisition module comprises beta-phase feeder line current acquisition units which are respectively arranged on a plurality of feeder lines of the beta-phase bus and used for acquiring beta-phase feeder line currents of the corresponding feeder lines; the beta-phase bus signal acquisition module comprises a beta-phase bus voltage acquisition unit for acquiring beta-phase bus voltage;

the second power instruction calculation unit is specifically configured to:

and calculating the feeder power corresponding to each feeder of the beta-phase bus according to the beta-phase bus voltage and the beta-phase feeder current, and summing the feeder power corresponding to each feeder of the beta-phase bus to obtain the beta-phase power.

In one embodiment, the beta-phase feeder current collection unit comprises a current transformer; the beta-phase bus voltage acquisition unit comprises a voltage transformer.

In one embodiment, the first power command calculation unit comprises an electric energy meter.

In one embodiment, the second power command calculation unit comprises an electric energy meter.

In one embodiment, the alpha phase bus signal includes an alpha phase bus current and an alpha phase bus voltage; the beta-phase bus signal comprises beta-phase bus current and beta-phase bus voltage;

the alpha-phase bus signal acquisition module comprises an alpha-phase bus current acquisition unit for acquiring alpha-phase bus current and an alpha-phase bus voltage acquisition unit for acquiring alpha-phase bus voltage, and the beta-phase bus signal acquisition module comprises a beta-phase bus current acquisition unit for acquiring beta-phase bus current and a beta-phase bus voltage acquisition unit for acquiring beta-phase bus voltage;

the first power instruction calculating unit is also used for calculating the alpha-phase bus power according to the alpha-phase bus current and the alpha-bus voltage and sending the alpha-phase bus power to the central processing unit;

the second power instruction calculating unit is also used for calculating the beta-phase bus power according to the beta-phase bus current and the beta-phase bus voltage and sending the beta-phase bus power to the central processing unit;

the central processing unit is also used for checking the correctness of the energy control instruction according to the alpha-phase bus power and the beta-phase bus power.

In one embodiment, the alpha phase bus current collection unit comprises a current transformer and the beta phase bus current collection unit comprises a current transformer.

A second aspect of an embodiment of the present invention provides a traction power supply system, including:

energy storage devices, railway power conditioning devices, traction grids, and energy management devices as above.

Compared with the prior art, the embodiment of the invention has the following beneficial effects: the energy management device in the traction power supply system provided by the embodiment comprises: the system comprises a first power instruction calculating unit, a second power instruction calculating unit, a central processing unit, an alpha-phase bus signal acquisition module, a beta-phase bus signal acquisition module, an alpha-phase feeder signal acquisition module and a beta-phase feeder signal acquisition module; the system comprises an alpha-phase bus signal acquisition module, a beta-phase bus signal acquisition module and an alpha-phase feeder line signal acquisition module, wherein the alpha-phase bus signal acquisition module is used for acquiring an alpha-phase bus signal, the beta-phase bus signal acquisition module is used for acquiring a beta-phase bus signal, and the alpha-phase feeder line signal acquisition module is used for acquiring an alpha-phase feeder line signal; the beta-phase feeder line signal acquisition module is used for acquiring beta-phase feeder line signals; the first power instruction calculating unit is used for calculating alpha-phase power according to the alpha-phase feeder line signal and the alpha-phase bus signal and sending the alpha-phase power to the central processing unit; the second power instruction calculation unit is used for calculating beta-phase power according to the beta-phase feeder line signal and the beta-phase bus signal and sending the beta-phase power to the central processing unit; the central processing unit is used for generating an energy control instruction according to the alpha-phase power and the beta-phase power, and the energy control instruction is used for controlling a railway power regulator of the traction power supply system to manage energy. The energy management device provided by the embodiment calculates the alpha-phase power and the beta-phase power by acquiring the feeder line signals, so that the problem of inaccurate acquisition working condition after an energy storage device or other energy devices are newly added on a line can be avoided, and the signal acquisition accuracy is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of an energy management device in a traction power supply system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of connection between each transformer and an electric energy meter of the energy management device according to the embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to explain the technical means of the present invention, the following description will be given by way of specific examples.

In one embodiment, as shown in fig. 1, fig. 1 shows a structure of an energy management device in a traction power supply system provided by the present embodiment, which includes:

the system comprises a first power instruction calculating unit 10, a second power instruction calculating unit 20, a central processing unit 30, an alpha-phase bus signal acquisition module arranged on an alpha-phase bus of a traction substation, a beta-phase bus signal acquisition module arranged on a beta-phase bus of the traction substation, an alpha-phase feeder line signal acquisition module arranged on a feeder line of the alpha-phase bus and a beta-phase feeder line signal acquisition module arranged on a feeder line of the beta-phase bus;

the alpha-phase bus signal acquisition module and the alpha-phase feeder signal acquisition module are respectively connected with the first power instruction calculation unit, and the beta-phase bus signal acquisition module and the beta-phase feeder signal acquisition module are respectively connected with the second power instruction calculation unit; the first power instruction calculating unit and the second power instruction calculating unit are respectively connected with the central processing unit;

the system comprises an alpha-phase bus signal acquisition module, a beta-phase bus signal acquisition module and an alpha-phase feeder line signal acquisition module, wherein the alpha-phase bus signal acquisition module is used for acquiring an alpha-phase bus signal, the beta-phase bus signal acquisition module is used for acquiring a beta-phase bus signal, and the alpha-phase feeder line signal acquisition module is used for acquiring an alpha-phase feeder line signal; the beta-phase feeder line signal acquisition module is used for acquiring beta-phase feeder line signals;

the first power instruction calculating unit is used for calculating alpha-phase power according to the alpha-phase feeder line signal and the alpha-phase bus signal and sending the alpha-phase power to the central processing unit;

the second power instruction calculation unit is used for calculating beta-phase power according to the beta-phase feeder line signal and the beta-phase bus signal and sending the beta-phase power to the central processing unit;

the central processing unit is used for generating an energy control instruction according to the alpha-phase power and the beta-phase power, and the energy control instruction is used for controlling a railway power regulator of the traction power supply system to manage energy.

In this embodiment, the energy control instruction is used to enable the railway power conditioner to control the α power supply arm to transfer traction energy to the β power supply arm, the β power supply arm to transfer traction energy to the α power supply arm, the α power supply arm to transfer braking energy to the β power supply arm, and the β power supply arm to transfer braking energy to the α power supply arm; if the energy storage device is connected into the traction power supply system, the energy control instruction is also used for enabling the railway power regulator to control the energy storage system to store energy from the alpha power supply arm, and the energy storage system releases energy to the alpha power supply arm; the energy storage system stores energy from the beta power supply arm, and the energy storage system releases energy to the beta power supply arm.

In this embodiment, the α -phase bus signal may include an α -phase bus voltage and an α -phase bus current. The beta phase bus signal may include a beta phase bus voltage and a beta phase bus current.

According to the embodiment, the power value of the train after energy is mutually utilized between trains on the same power supply arm can be directly calculated by acquiring the electric signals on the feeder line of the two-phase bus of the traction substation, the situation that the line working condition before the intervention of the energy storage system cannot be correctly acquired by acquiring the voltage and current signals on the traction power supply bus after the energy storage device is newly added on the line is avoided, and therefore the accuracy of signal acquisition and line working condition judgment is improved.

In one embodiment, the alpha phase bus signal comprises an alpha phase bus voltage; the alpha phase feeder signal comprises an alpha phase feeder current;

the alpha-phase feeder line signal acquisition module comprises alpha-phase feeder line current acquisition units which are respectively arranged on a plurality of feeder lines of the alpha-phase bus and used for acquiring alpha-phase feeder line currents of the corresponding feeder lines; the alpha-phase bus signal acquisition module comprises an alpha-phase bus voltage acquisition unit for acquiring alpha-phase bus voltage;

the first power instruction calculation unit is specifically configured to:

and calculating the feeder line power corresponding to each feeder line of the alpha-phase bus according to the alpha-phase bus voltage and each alpha-phase feeder line current, and summing the feeder line power corresponding to each feeder line of the alpha-phase bus to obtain the alpha-phase power.

In one embodiment, the alpha-phase feeder current collection unit comprises a current transformer; the alpha-phase bus voltage acquisition unit comprises a voltage transformer.

In one embodiment, the beta phase bus signal comprises a beta phase bus voltage; the beta-phase feeder line signal comprises beta-phase feeder line current;

the beta-phase feeder line signal acquisition module comprises beta-phase feeder line current acquisition units which are respectively arranged on a plurality of feeder lines of the beta-phase bus and used for acquiring beta-phase feeder line currents of the corresponding feeder lines; the beta-phase bus signal acquisition module comprises a beta-phase bus voltage acquisition unit for acquiring beta-phase bus voltage;

the second power instruction calculation unit is specifically configured to:

and calculating the feeder power corresponding to each feeder of the beta-phase bus according to the beta-phase bus voltage and the beta-phase feeder current, and summing the feeder power corresponding to each feeder of the beta-phase bus to obtain the beta-phase power.

In one embodiment, the beta-phase feeder current collection unit comprises a current transformer; the beta-phase bus voltage acquisition unit comprises a voltage transformer.

In the present embodiment, as shown in fig. 1, taking an example that the α -phase bus includes two feeder lines, and the β -phase bus includes two feeder lines, the α -phase feeder line current collection unit includes a current transformer CT3 installed on the feeder line 1 and a current transformer CT4 installed on the feeder line 2, the β -phase feeder line current collection unit includes a current transformer CT5 installed on the feeder line 3 and a current transformer CT6 installed on the feeder line 4, current signals at the secondary sides of the current transformer CT3 and the current transformer CT4 are sent to the first power instruction calculation unit, and current signals at the secondary sides of the current transformer CT5 and the current transformer CT6 are sent to the second power instruction calculation unit. The current transformer can be directly connected with a measuring winding of the circuit breaker CT or connected in series with an existing measuring winding loop.

A current transformer CT1 corresponding to the alpha-phase bus current acquisition unit is installed on the alpha-phase bus, and a current transformer CT2 corresponding to the beta-phase bus current acquisition unit is installed on the beta-phase bus; and a voltage transformer PT1 corresponding to the alpha-phase bus voltage acquisition unit is installed on the alpha-phase bus, and a voltage transformer PT2 corresponding to the beta-phase bus voltage acquisition unit is installed on the beta-phase bus.

In one embodiment, the first power command calculation unit comprises an electric energy meter.

In one embodiment, the second power command calculation unit comprises an electric energy meter.

In this embodiment, the first power instruction calculating unit/the second power instruction calculating unit may be a software processing device, and may also be an electric energy meter.

When the first power instruction calculating unit/the second power instruction is the electric energy meter, the worker can select the model of the electric energy meter according to the number of the feeder lines.

Specifically, taking an α -phase bus including two feeder lines and an electric energy meter corresponding to the first power instruction calculating unit as an example, a process of performing power calculation by using the electric energy meter is as follows:

as shown in fig. 2, terminals 2 and 5 of the electric energy meter terminal are respectively connected with YMa and YMn, and simultaneously, the terminals 2 and 8 are connected in parallel, the center line of the terminal 5 is shared, terminals 1 and 3 are respectively connected with a CT3 secondary side loop, terminals 7 and 9 are respectively connected with a CT4 secondary side loop, the terminals 1 and 3 in the electric energy meter are a current transformer in the electric energy meter, the terminals 2 and 5 are voltage signals corresponding to the current loops of the terminals 1 and 3, and the power of the loop can be obtained by multiplying the current signals of the terminals 1 and 3 by the voltage signals of the terminals 2 and 5. Similarly, the terminals 7 and 9 are a current transformer inside the electric energy meter, the terminals 8 and 5 are voltage signals corresponding to a current loop of the terminals 7 and 9, and the power of the loop can be obtained by multiplying the current signals of the terminals 7 and 9 by the voltage signals of the terminals 8 and 5. Then the algebraic sum of the two powers is taken as the alpha-phase power measured by the alpha-phase electric energy meter. The output power of the connection mode is the algebraic sum of the power of the feeder 1 and the power of the feeder 2, namely the power value after the energy between trains on the same power supply arm is mutually utilized.

Similarly, the electric energy meter corresponding to the beta phase can also adopt the wiring mode to realize the calculation of the sum of the power of each feeder line of the beta phase.

By the method, the power can be directly measured by the electric energy meter, so that the power signal is directly output to the central processing unit.

In one embodiment, the alpha phase bus signal includes an alpha phase bus current and an alpha phase bus voltage; the beta-phase bus signal comprises beta-phase bus current and beta-phase bus voltage;

the alpha-phase bus signal acquisition module comprises an alpha-phase bus current acquisition unit for acquiring alpha-phase bus current and an alpha-phase bus voltage acquisition unit for acquiring alpha-phase bus voltage, and the beta-phase bus signal acquisition module comprises a beta-phase bus current acquisition unit for acquiring beta-phase bus current and a beta-phase bus voltage acquisition unit for acquiring beta-phase bus voltage;

the first power instruction calculating unit is also used for calculating the alpha-phase bus power according to the alpha-phase bus current and the alpha-bus voltage and sending the alpha-phase bus power to the central processing unit;

the second power instruction calculating unit is also used for calculating the beta-phase bus power according to the beta-phase bus current and the beta-phase bus voltage and sending the beta-phase bus power to the central processing unit;

the central processing unit is also used for checking the correctness of the energy control instruction according to the alpha-phase bus power and the beta-phase bus power.

In this embodiment, the α -phase bus power and the β -phase bus power are used to check whether the execution result of the railway power regulator is correct, and if not, the issuing of the energy control instruction is stopped, and notification information indicating that the checking is incorrect is sent to the terminal device, so that the staff can adjust the execution command in time, and the accuracy of energy management is ensured.

In one embodiment, the alpha phase bus current collection unit comprises a current transformer and the beta phase bus current collection unit comprises a current transformer.

The embodiment provides a traction power supply system which comprises an energy storage device, a railway power regulating device, a traction network and the energy management device.

In the present embodiment, the energy storage device includes, but is not limited to, flywheel energy storage device, super capacitor energy storage device, and other various forms of energy storage devices. The traction power supply system provided by the embodiment can be applied to electric railways such as high-speed railways, ordinary-speed railways and urban railways. When the energy management device is applied to a traction power supply system comprising an energy storage device, the energy control command generated by the energy management device is used for controlling the railway power regulation device and the energy management device to realize energy management of the traction power supply system.

The acquisition method provided by the application avoids the condition that the acquisition working condition is inaccurate after an energy storage device is newly added on a circuit, and the algorithm of the central processing unit is simpler while the mode of measuring the power by the electric energy meter is more convenient. The method is an excellent method for collecting and judging the working condition of the line.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.