CN201829840U - Integral box type substation with compact arrangement - Google Patents

Abstract

The utility model relates to a compact layout integrated box-type substation. The box-type substation of the utility model is composed of a transformer, a high-voltage cabinet, a low-voltage cabinet and a capacitor cabinet. The high-voltage cable inlet plug of the transformer, the transformer tap changer, the oil level gauge, the thermometer, the pressure gauge, and the pressure release valve , The oil drain plug is installed on the side of the transformer near the high voltage cabinet. In this box-type substation, the capacitor cabinet and the high-voltage cabinet are overlapped and combined. The shielded touchable plug-in head of the main power cable on the side of the high-voltage cabinet is behind the capacitor room. The capacitor cabinet is a structure that can be rotated and opened as a whole. The use of this transformer and its connection method greatly reduces the volume of the box-type substation, has strong applicability, high safety, and low noise. It can go deep into the power load center, reduce line loss, reduce the use of low-voltage cables, and reduce wire loss. And improve the quality of power supply.

Description

Compact layout integrated box-type substation

technical field

The utility model relates to a prepackaged box-type substation, in particular to a compact layout type box-type substation. the

Background technique

The box-type substation is a combination of electrical primary equipment (high-voltage switchgear, power transformer, low-voltage switchgear, fans and heaters, etc.) Communication devices, etc.) are combined into one body, and these devices are installed in a container that looks like a "box", without walls, houses, or structures. the

The pre-installed box-type substation started from the 1960s to the 1970s. It is an outdoor complete substation developed by western developed countries such as Europe and the United States. This technology was introduced into China in the early 1990s, and the power sector formulated corresponding standards. In urban power grid construction and renovation projects, prefabricated box-type transformers are widely used due to their advantages of land saving, energy saving and miniaturization. the

European-style prefabricated substations use traditional transformers, which are characterized by easy installation, but they are large in size and the power distribution is too centralized. Due to its large size, it occupies a lot of limited land resources, which affects the appearance of the environment. More importantly, because the low-voltage load is too concentrated, many low-voltage outgoing cables increase the line loss rate, and the cost of investing in medium and low-voltage copper core cables at the initial stage is greatly increased. . the

The American prefabricated substation adopts a special transformer, which is small in size and easy to penetrate into the load center, which reduces the power supply radius and improves the terminal voltage quality. However, the single transformer distribution scheme cannot meet the needs of users with high requirements for high-voltage metering and transformer protection. needs. And because the high-voltage and low-voltage incoming and outgoing lines of American transformers are installed on the front of the transformer, the traditional high-voltage and low-voltage incoming and outgoing lines of transformers are connected and installed on the top of the oil tank of the transformer with insulating porcelain bushings. Space increases. The key to determine the power distribution function and dimensions of the box-type substation is the high-voltage switchgear and the transformer room, which account for about 2/3 of the size of the box-type substation. This kind of transformer and its wiring method make the box-type substation larger in size, and it is not easy to be close to the power consumption terminal and go deep into the load center. the

Utility model content

In view of the above situation, the utility model provides an improved compact layout integrated box-type substation to solve the above problems. the

The compact layout integrated box-type substation of the utility model is composed of a transformer, a high-voltage cabinet, a low-voltage cabinet and a capacitor cabinet. , pressure relief valve, and oil drain plug are installed on the side of the transformer. the

In the above-mentioned box-type substation, its transformer high-voltage cable inlet plug, transformer tap changer, oil level gauge, thermometer, pressure gauge, pressure relief valve, and oil drain plug are installed near the side of the high-voltage cabinet. the

In the above-mentioned box-type substation, the capacitor cabinet and the high-voltage cabinet are overlapped and combined. The shielded touchable plug-in head of the main power cable on the side of the high-voltage cabinet is behind the capacitor room, and the capacitor cabinet is a structure that can be rotated and opened as a whole. the

In the above-mentioned box-type substation, the capacitor cabinet and the adjacent low-voltage cabinet are fixed by a rotatable fixing device. the

In the above-mentioned box-type substation, the capacitor cabinet and the adjacent low-voltage cabinet are fixed by hinges, one end of the hinge is fixed on the capacitor cabinet, and the other end is fixed on the low-voltage cabinet. the

In the above-mentioned box-type substation, the power supply line of the capacitor room is connected to the main circuit busbar of the low-voltage room through a flexible connection cable. the

In the above-mentioned box-type substation, the flexible connecting cable between the capacitor room and the main circuit of the low-voltage room is inside the machine. the

By changing the structure and wiring mode of the power transformer, the utility model provides a compact layout integrated box-type substation, whose volume is only 1/3 to 1/4 of the same type of European-style box-type substation, with small volume, high safety, Low noise, strong applicability, effective energy saving and so on. the

Due to the small size of the compact layout integrated box-type substation, it can be installed in places where traditional large substations cannot be installed due to terrain and environmental influences. In this way, it can be close to the power terminal, go deep into the load center, and reduce the power loss and wire loss of the transmission line. . the

According to the estimation of relevant data: from power generation to power supply, to the process of electricity consumption, the total power consumption of various electrical equipment (including generators, transformers, power lines, motors, etc.) in the generalized power system accounts for about 28% of the power generation. %-33%. Calculated based on my country's power generation in 2002, among the electrical equipment in operation, there is a yearly power loss of 463.2 billion kW·h-545.8 billion kW·h for the whole country, which is equivalent to the power consumption of 10 medium power-consuming provinces Sum. In order to ensure the high-speed and stable development of the national economy, it is of great significance to seek a way to save electricity by relying on high-tech without material investment. The economical operation of the power grid is a connotative power-saving technology that achieves obvious power-saving effects without material investment. the

The main loss of the power system is composed of transformer loss and transmission line conductor loss. Due to the existence of wire resistance of transmission lines, a large amount of power loss will be caused during power transmission, and the power loss caused by long-distance high-voltage power transmission lines accounts for about 5% to 7% of the transmitted power. For the local power grid, the terminal of the 35 kV or 110Kv high-voltage line is deep into the load center of the enterprise and the city, and the length of the 10 kV distribution line can be greatly shortened to reduce line loss. At the same time, this can simplify the number of transformation stages (according to statistics, each transformation will consume 1-2% of reactive power, and the more transformation lines, the greater the loss). The small integrated box-type substation goes deep into the load center, which is of great significance to reduce the power loss of low-voltage lines and save the consumption of non-ferrous metals. It is especially suitable for occasions where the medium voltage terminal load is dispersed. the

The main high-voltage power supply first enters the high-voltage cabinet of the box transformer from the incoming line end of the high-voltage cabinet, then connects the outgoing line end of the high-voltage cabinet to the high-voltage incoming line end of the transformer, and then connects to the low-voltage cabinet from the low-voltage outgoing line end of the transformer, and then connects the capacitor through the low-voltage cabinet , connected to the user through a capacitor. the

Using reactive power compensation capacitor cabinets or adjusting transformer taps in substations can increase the voltage level of the grid operation and effectively reduce the power loss of the power grid. According to calculations, if the line operating voltage value increases by 5%, the power loss can be reduced by 9%. If the 6kV line is raised to 10V operation, the power loss can be reduced by about 64%, and the transmission parameters of the line are greatly increased at the same time. This can also simplify the number of transformation stages, make the grid layout more reasonable, and minimize the loss of the grid. the

In the compact layout integrated box-type substation, the flexible connection cable between the capacitor cabinet and the low-voltage cabinet is inside the machine. When the capacitor cabinet is opened, it does not affect the cable connection, so it can be opened with power. After opening, you can see the shielded touchable plug-in head of the main power cable on the side of the high-voltage cabinet, and you can perform installation or maintenance operations. This shielded touchable plug can ensure the safety of the high-voltage part after opening, and will not cause danger to people. Moreover, the openable capacitor cabinet can also reduce the damage of electrical equipment, prolong the life of electrical equipment, and reduce the maintenance workload. the

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail. the

Fig. 1 is a plane layout diagram of the compact layout integrated box-type substation of the present invention. the

Figure 2 is a structural diagram of the side of the transformer near the high-voltage cabinet. the

Fig. 3 is a plane layout diagram when the capacitor cabinet of the box-type transformer of the utility model is rotated and opened. the

Figure 4 is a structural diagram of the hinge assembled and disassembled. the

Detailed ways

A compact layout integrated box-type substation consists of transformers, high-voltage cabinets, low-voltage cabinets and capacitor cabinets. The transformer's high-voltage cable inlet plug 1, transformer tap changer 6, oil level gauge 4, double upper Limiting contact temperature controller 2, pressure gauge 5, pressure relief valve 3, oil drain plug 7 are installed near the side of the high voltage cabinet of the transformer. The capacitor cabinet and the high-voltage room are overlapped and combined. The plug-in head of the main power cable on the side of the high-voltage room is behind the capacitor cabinet. The capacitor cabinet is a structure that can be rotated and opened as a whole. When the main power cable junction room on the side of the high-voltage room fails and needs to be repaired, the capacitor cabinet can be opened to carry out maintenance operations. The capacitor cabinet and the adjacent low-voltage cabinet are fixed by 8 hinges, one end of the hinge is fixed on the capacitor cabinet, and the other end is fixed on the low-voltage cabinet. The power supply line of the capacitor room is connected with the main circuit busbar of the low-voltage room through a flexible connecting cable 9 . The flexible connecting cable between the capacitor room and the main circuit of the low-voltage room is inside the machine. the

Due to its small size, the compact layout integrated box-type substation can be installed in places where traditional large substations cannot be installed due to terrain and environmental influences. In this way, it can be close to the power terminal and go deep into the load center to reduce the power loss and wire loss of the transmission line. . the

Using reactive power compensation capacitor cabinets or adjusting transformer taps in substations can increase the voltage level of the grid operation and effectively reduce the power loss of the power grid. the

Since the flexible connection cable between the capacitor cabinet and the low-voltage cabinet is inside the machine, the connection of the cables will not be affected when the capacitor cabinet is opened, so it can be opened with power on. After opening, you can see the shielded touchable plug-in head of the main power cable on the side of the high-voltage cabinet, and you can perform installation or maintenance operations. This shielded touchable plug can ensure the safety of the high-voltage part after opening, and will not cause danger to people. Moreover, the openable capacitor cabinet can also reduce the damage of electrical equipment, prolong the life of electrical equipment, and reduce the maintenance workload. the

The compact layout integrated box-type substation of the utility model has the characteristics of small size, high safety, low noise, strong applicability, and effective energy saving. the

The above embodiment is only a description of the preferred implementation of the utility model, not to limit the scope of the utility model. Without departing from the design spirit of the utility model, those of ordinary skill in the art made the technical solution of the utility model Various modifications and improvements should fall within the protection scope determined by the claims of the present utility model. the

Claims (7)

1. A compact layout integrated box-type substation, which is composed of transformers, high-voltage cabinets, low-voltage cabinets and capacitor cabinets. , thermometer, pressure gauge, pressure relief valve, and oil drain plug are installed on the side of the transformer. 2. The box-type substation as claimed in claim 1, characterized in that: the high-voltage cable inlet plug of the transformer, the transformer tap changer, the oil level gauge, the thermometer, the pressure gauge, the pressure release valve, and the oil drain plug are installed On the side of the transformer near the high-voltage cabinet. 3. The box-type substation as claimed in claim 1 or 2, wherein the capacitor cabinet and the high-voltage cabinet are overlapped and combined, and the shielded touchable plug-in plug of the total power supply cable on the side of the high-voltage cabinet is behind the capacitor room, which is characterized in that : Its capacitor cabinet is a structure that can be rotated and opened as a whole. 4. The box-type substation according to claim 3, characterized in that: the capacitor cabinet and the adjacent low-voltage cabinet are fixed by a rotatable fixing device. 5. The box-type substation according to claim 4, characterized in that: the capacitor cabinet and the adjacent low-voltage cabinet are fixed by a hinge, one end of the hinge is fixed on the capacitor cabinet, and the other end is fixed on the low-voltage cabinet. 6. The box-type substation according to any one of claims 3-5, characterized in that: the power supply line of the capacitor room is connected to the main circuit busbar of the low-voltage room through a flexible connection cable. 7. The box-type substation according to any one of claims 3-5, characterized in that: the flexible connection cable between the capacitor room and the main circuit of the low-voltage room is inside the machine.

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