A relay protection self-contained power supply

Abstract

The present invention relates to a relay protection self-contained power supply. It comprises diodes D1, D0, D2, a first signal lamp XD1, a second signal lamp XD1, a current limiting and voltage limiting charging module M1, a battery overvoltage protection module M2, a battery capacity detection module M3, a DC / DC boost module M4, and an anti-interference module M5; the positive electrode of the diode D1 is respectively connected to the positive electrode of D0, the cathode of D1 is respectively connected to the first end of the first signal lamp XD1 and the first end of the current limiting and voltage limiting charging module M1, the third end of the current limiting and voltage limiting charging module M1 is respectively connected to the battery overvoltage protection module M2, the battery capacity detection module M3, and the DC / DC boost module M4, the DC / DC boost module M4 is also connected to the anti-interference module M5, and the second signal lamp XD1 is connected in parallel at both ends of the anti-interference module M5. The relay protection self-contained power supply is a short-time self-contained power supply for a protection device that can improve the safety of the protection device.

Description

Technical Field

[0001] The invention relates to the technical field of circuit protection devices, and in particular to a short-time self-contained power supply for a protection device. Background Art

[0002] In modern power systems, the power supply for 110kV line protection of 220kV substations is configured separately, and the low-voltage DC power supply for 110kV line protection of important 110kV substations is also configured separately. If a fault occurs in the power system, the charging device trips, and the battery capacity drops sharply or opens, and reliable low-voltage DC power cannot be provided to the protection and tripping circuits, the line switch will refuse to operate, causing a cross-level fault removal, which will lead to large-scale power outages, which will bring great difficulties to the safe production of enterprises and the protection of people's lives and property. Summary of the invention

[0003] In view of the above problems, the present invention aims to solve the above problems. One object of the present invention is to provide a relay protection self-contained power supply that solves the above problems. Specifically, the present invention provides a short-time self-contained power supply for a protection device that can improve the safety of the protection device.

[0004] The technical solution of the present invention is: a relay protection self-contained power supply, including diodes D1, D0, D2, a first signal light XD1, a second signal light XD2, a current limiting and voltage limiting charging module M1, a battery overvoltage protection module M2, a battery capacity detection module M3, a DC / DC boost module M4, and an anti-interference module M5; the positive electrode of the diode D1 is respectively connected to the positive electrode of D0 and 220V+, the cathode of D1 is respectively connected to the first end of the first signal light XD1 and the first end of the current limiting and voltage limiting charging module M1, the second end of the first signal light XD1 and the second end of the current limiting and voltage limiting charging module M1 are connected to 220V-, and the third end of the current limiting and voltage limiting charging module M1 is respectively connected to the battery overvoltage protection module M2 and the battery capacity detection module M3. The detection module M3 and the DC / DC boost module M4 are connected, the battery overvoltage protection module M2 and the battery capacity detection module M3 are respectively arranged at the two ends of the battery, the DC / DC boost module M4 is also connected to the anti-interference module M5, and the second signal light XD2 is connected in parallel at both ends of the anti-interference module M5, the anti-interference module M5 is also connected to the anode of the diode D2, the cathode of D2 is respectively connected to the cathode of D0, and the cathode of D2 and the cathode of D0 serve as the first output end of the relay protection self-contained power supply, the first end of the second signal light XD2 is connected to the anode of the diode D2, and the second end of the second signal light XD2 and the second end of the first signal light XD1 serve as the second output end of the relay protection self-contained power supply.

[0005] Furthermore, it also includes terminals J1, J2, J3, and J4; terminal J1 is connected to 220V+, terminals J2 and J3 are connected to 220V-, and terminal J3 serves as the second output end of the relay protection self-contained power supply, and terminal J4 is respectively connected to the cathode of D2 and the cathode of D0 and serves as the first output end of the relay protection self-contained power supply.

[0006] The beneficial effects of the present invention are as follows: the present invention is a short-time self-contained power supply for a protection device which can improve the safety of the protection device, can provide a standby power of 100W, and the working time can reach more than 20 minutes.

[0007] Other characteristic features and advantages of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. For those of ordinary skill in the art, other drawings can be obtained from these drawings without paying creative work.

[0009] Figure 1 The structural diagram of the relay protection self-contained power supply of the present invention is exemplarily shown. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0011] The basic idea of ​​the present invention is that

[0012] The relay protection self-contained power supply provided according to the present invention is described in detail below in conjunction with the accompanying drawings.

[0013] Example 1: Figure 1As shown, a relay protection self-contained power supply includes diodes D1, D0, D2, a first signal light XD1, a second signal light XD2, a current limiting and voltage limiting charging module M1, a battery overvoltage protection module M2, a battery capacity detection module M3, a DC / DC boost module M4, and an anti-interference module M5; the anode of the diode D1 is respectively connected to the anode of D0 and 220V+, the cathode of D1 is respectively connected to the first end of the first signal light XD1 and the first end of the current limiting and voltage limiting charging module M1, the second end of the first signal light XD1 and the second end of the current limiting and voltage limiting charging module M1 are connected to 220V-, and the third end of the current limiting and voltage limiting charging module M1 is respectively connected to the battery overvoltage protection module M2 and the battery capacity detection module M3. The block M3 and the DC / DC boost module M4 are connected, the battery overvoltage protection module M2 and the battery capacity detection module M3 are respectively arranged at the two ends of the battery, the DC / DC boost module M4 is also connected to the anti-interference module M5, and the second signal light XD2 is connected in parallel at both ends of the anti-interference module M5, the anti-interference module M5 is also connected to the anode of the diode D2, the cathode of D2 is respectively connected to the cathode of D0, and the cathode of D2 and the cathode of D0 serve as the first output end of the relay protection self-contained power supply, the first end of the second signal light XD2 is connected to the anode of the diode D2, and the second end of the second signal light XD2 and the second end of the first signal light XD1 serve as the second output end of the relay protection self-contained power supply.

[0014] Furthermore, it also includes terminals J1, J2, J3, and J4; terminal J1 is connected to 220V+, terminals J2 and J3 are connected to 220V-, and terminal J3 serves as the second output end of the relay protection self-contained power supply, and terminal J4 is respectively connected to the cathode of D2 and the cathode of D0 and serves as the first output end of the relay protection self-contained power supply.

[0015] The working principle of the present invention is:

[0016] The 220V AC power supply of the present invention is input through J1 and J2 wiring terminals.

[0017] Under normal circumstances, the current flows in the following order: 220V positive power supply → J1 terminal → D0 diode → J4 → protection device → J3 → J2 back to 220V negative power supply.

[0018] When the input power is normal, input 220V positive power → diode D1 → first signal light XD1, and the 220V DC power input is normal. At the same time, the 220V positive power through diode D1 is loaded on the current limiting and voltage limiting charging module M1, and the four series-connected rechargeable lithium batteries are charged. The battery overvoltage protection module M2 is a protection circuit for the lithium battery to prevent the lithium battery from being overcharged and damaged. The battery capacity detection module M3 is a device that detects the capacitance of each lithium battery when the lithium battery voltage is boosted for protection.

[0019] Figure 1 The first signal light XD1 on the middle left hand side, when there is input power, the first signal light XD1 lights up green, when there is output power, the second signal light XD2 lights up red.

[0020] The DC / DC boost module M4 increases the voltage from 16V to 208V, and then after anti-interference filtering by the anti-interference module M5 (anti-interference filter can be used), the positive 208V is supplied to the protection device through → diode D2 → J4. The anti-interference module M5 can eliminate the high-frequency components contained in the DC boost that affect the normal operation of the protection device.

[0021] Other upper-level DC loads are also connected to the 220V. The function of the D0 diode is that, under normal circumstances, the protection device is powered by the working power supply. Since the DC voltage output by the DC / DC boost module M4 is only 208V, and the negative terminal of the D0 diode has a DC voltage of about 235V under normal circumstances, the D2 diode is in an automatic blocking state. When the upper-level input power supply disappears, the negative power supply voltage of D2 is higher than the negative power supply voltage of D0, and the D0 diode is reversely blocked. The voltage output by the DC / DC boost module M4 can only supply the protection device it carries, and will not supply power to the upper-level power supply, which can overcome the problem of the upper-level power supply quickly exhausting the battery power, and at the same time prevent the device from being damaged by carrying a larger load. The present invention can provide 100W of standby power, and the working time can reach more than 20 minutes.

[0022] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present invention.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the article or device including the elements.

[0024] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. The present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A relay protection self-contained power supply, characterized in that: It includes diodes D1, D0, D2, a first signal light XD1, a second signal light XD2, a current limiting and voltage limiting charging module M1, a battery overvoltage protection module M2, a battery capacity detection module M3, a DC / DC boost module M4, and an anti-interference module M5; the anode of the diode D1 is respectively connected to the anode of D0 and 220V+, the cathode of D1 is respectively connected to the first end of the first signal light XD1 and the first end of the current limiting and voltage limiting charging module M1, the second end of the first signal light XD1 and the second end of the current limiting and voltage limiting charging module M1 are connected to 220V-, and the third end of the current limiting and voltage limiting charging module M1 is respectively connected to the battery overvoltage protection module M2, the battery capacity detection module M3, and the DC / DC boost module M4. The DC boost module M4 is connected, the battery overvoltage protection module M2 and the battery capacity detection module M3 are respectively arranged at the two ends of the battery, the DC / DC boost module M4 is also connected to the anti-interference module M5, and the second signal light XD2 is connected in parallel at both ends of the anti-interference module M5, the anti-interference module M5 is also connected to the anode of the diode D2, the cathode of D2 is respectively connected to the cathode of D0, and the cathode of D2 and the cathode of D0 serve as the first output end of the relay protection self-contained power supply, the first end of the second signal light XD2 is connected to the anode of the diode D2, and the second end of the second signal light XD2 and the second end of the first signal light XD1 serve as the second output end of the relay protection self-contained power supply.

2. The relay protection self-contained power supply according to claim 1 is characterized in that: It also includes terminals J1, J2, J3, and J4; terminal J1 is connected to 220V+, terminals J2 and J3 are connected to 220V-, and terminal J3 serves as the second output end of the relay protection self-contained power supply, and terminal J4 is respectively connected to the cathode of D2 and the cathode of D0 and serves as the first output end of the relay protection self-contained power supply.

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